{"id":89967,"date":"2024-02-27T21:53:08","date_gmt":"2024-02-28T02:53:08","guid":{"rendered":"https:\/\/ifintechworld.com\/?p=89967"},"modified":"2024-02-27T21:53:09","modified_gmt":"2024-02-28T02:53:09","slug":"regenxbio-inc-rgnx-q4-2023-earnings-call-transcript","status":"publish","type":"post","link":"https:\/\/ifintechworld.com\/?p=89967","title":{"rendered":"REGENXBIO Inc. (RGNX) Q4 2023 Earnings Call Transcript"},"content":{"rendered":"
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REGENXBIO Inc. (NASDAQ:RGNX<\/span>) Q4 2023 Earnings Conference Call February 27, 2024 4:30 PM ET<\/p>\n

Company Participants<\/strong><\/p>\n

Patrick Christmas \u2013 Chief Legal Officer<\/p>\n

Ken Mills \u2013 Chief Executive Officer<\/p>\n

Steve Pakola \u2013 Chief Medical Officer<\/p>\n

Vit Vasista \u2013 Chief Financial Officer<\/p>\n

Conference Call Participants<\/strong><\/p>\n

Gena Wang \u2013 Barclays<\/p>\n

Gospel Enyindah-Asonye \u2013 Morgan Stanley<\/p>\n

Alec Stranahan \u2013 Bank of America<\/p>\n

Annabel Samimy \u2013 Stifel<\/p>\n

Lisa Walter \u2013 RBC Capital Markets<\/p>\n

Mani Foroohar \u2013 Leerink Partners<\/p>\n

Operator<\/strong><\/p>\n

Good day, and thank you for standing by. Welcome to REGENXBIO\u2019s Fourth Quarter 2023 Earnings Conference Call. At this time, all participants are in a listen-only mode. After the speakers\u2019 presentation, there will be a question-and-answer session. [Operator Instructions] Please be advised today\u2019s conference is being recorded.<\/p>\n

I would now like to hand the conference over to Patrick Christmas, Chief Legal Officer. Please go ahead.<\/p>\n

Patrick Christmas<\/strong><\/p>\n

Good afternoon, and thank you for joining us today. Earlier this afternoon, REGENXBIO released financial and operating results for the fourth quarter and full year ended December 31, 2023. The press release is available on our website at www.regenxbio.com.<\/p>\n

Today\u2019s conference call will include forward-looking statements regarding our financial outlook, in addition to regulatory and product development plans. These forward-looking statements are subject to risks and uncertainties that may cause actual results to differ from those forecasted and can be identified by words such as expect, plan, will, may, anticipate, believe, should, intend, and other words of similar meaning. Any such forward-looking statements are not guarantees of future performance and involve certain risks and uncertainties. These risks are described in the risk factors and the management\u2019s discussion and analysis sections, REGENXBIO\u2019s annual report on Form 10-K for the full year ended December 31, 2023, and comparable risk factors sections of REGENXBIO\u2019s quarterly report on Form 10-Q, which are on file with the Securities and Exchange Commission and available on the SEC\u2019s website.<\/p>\n

Any information we provide on this conference call is provided only as of the date of this call, February 27, 2024 and we undertake no obligation to update any forward-looking statements we may make on this call on account of new information, future events, or otherwise. Please be advised that today\u2019s call is being recorded and webcast. In addition any unaudited or pro forma financial information that may be provided is preliminary and does not purport to project financial positions or operating results of the company. Actual results may differ materially.<\/span><\/p>\n

I would like to now turn the call over to Ken Mills, CEO of REGENXBIO.<\/p>\n

Ken Mills<\/strong><\/p>\n

Thank you very much, Patrick, good afternoon, everyone, and thanks for joining us. I\u2019m pleased to begin today\u2019s call with a recap of our recent business highlights as well as an update on our corporate goals. Steve Pakola, our Chief Medical Officer, will then provide an update on clinical programs, and Vit Vasista, our Chief Financial Officer, will provide an overview of financial results for the fourth quarter and the full year ended December 31, 2023. At the end of the call, we\u2019re going to open the line up for questions.<\/p>\n

Late last year, REGENXBIO began work on a pipeline prioritization plan that enables us to focus our capabilities and resources on large commercial opportunities where product candidates are differentiated, can be expedited, and support meaningful value generation soon and for the long term. Our priority programs are ABBV-RGX-314 program for the treatment of wet AMD and diabetic retinopathy being developed in collaboration with our partner AbbVie. RGX-202 for the treatment of Duchenne and RGX-121 for the treatment of MPS II or Hunter syndrome.<\/p>\n

Early on in 2024, we\u2019ve experienced exciting progress for each of these programs. We believe there\u2019s a multibillion dollar potential for the RGX-314, a single injection treatment to become a first-in-class gene therapy in wet AMD, and the standard of care to treat and prevent progression of diabetic retinopathy. Enrollment remains on track with our subretinal delivery program for wet AMD, currently in pivotal trials with an expectation to support global regulatory submission by the end of 2025 through the first half of 2026.<\/p>\n

We hosted calls recently with leading retina experts to review our new positive clinical data from our treatment for wet AMD and diabetic retinopathy using in-office suprachoroidal delivery. These events were exciting for us, and today we\u2019re going to be talking about additional upcoming data and events that we\u2019re giving guidance on.<\/p>\n

Three weeks ago, we focused attention on our rare disease pipeline in two amazing milestones. In Duchenne, we announced the completion of enrollment in Cohort 2 and additional positive interim data from our ongoing trial. We are thrilled to see RGX-202 is demonstrating strong microdystrophin expression across a wide range of patients. And for MPS II, we achieved what I think is a major breakthrough with statistically significant results for our pivotal trial on which we are filing a BLA. Patients receiving this treatment have continued to show improvement in their neurodevelopmental skill acquisition up to four years, and we recently observed discontinuation standard of care intravenous enzyme therapy.<\/p>\n

Our recent milestones demonstrate how our new plan is supporting the acceleration in the development of gene therapies and the expansion of value for our shareholders. And today we\u2019re providing some new guidance, as I mentioned, on near term milestones for Duchenne and our treatments for wet AMD and diabetic retinopathy using in-office delivery. Next week, we have plans to share new Duchenne trial update at the Muscular Dystrophy Association Conference being held in Orlando, Florida. Also, we expect to share new program and data updates for the Phase 2 ALTITUDE and AVA trials in Q2 and mid 2024, respectively.<\/p>\n

Overall, we\u2019re absolutely thrilled about our status and the progress the company\u2019s made and with the way things have started off in 2024, I\u2019m going to circle back in a bit and talk more about next steps for us, but for now I\u2019m going to turn it over to Steve so he can do a deeper dive on the review of the clinical progress for our prioritized program.<\/p>\n

Steve Pakola<\/strong><\/p>\n

Thank you, Ken. I\u2019ll begin with RGX-314, which is being developed in collaboration with AbbVie to treat wet AMD and diabetic retinopathy via subretinal and suprachoroidal routes of administration.<\/p>\n

RGX-314 utilizes the NAV AAV8 vector to deliver a gene encoding as therapeutic antibody fragment to inhibit VEGF. The anti-VEGF market opportunity is poised to grow significantly as the population ages. RGX-314 for the treatment of wet AMD via subretinal delivery is being evaluated in two ongoing pivotal trials, ATMOSPHERE and ASCENT, which are expected to enroll a total of 1,200 patients in the U.S., Europe and Japan, and we anticipate global regulatory submissions in late 2025 through the first half of 2026.<\/p>\n

In addition to our Phase 2 Pharmacodynamic Study that is evaluating the same dose levels being used in the two pivotal trials, we also have two ongoing Phase 2 trials that fall under our collaboration with AbbVie assessing in-office suprachoroidal delivery of RGX-314 for the treatment of wet AMD in the AAV8 study and diabetic retinopathy or DR in the ALTITUDE study. AAV8 is an active controlled dose escalation trial evaluating RGX-314 for the treatment of wet AMD.<\/p>\n

In January, we presented full six month results from cohorts five and six at the Hawaiian Eye Meeting. Consistent with previous updates, the data presented continued to support the safety profile of RGX-314 and showed a meaningful reduction in anti-VEGF treatment burden. ALTITUDE is the observation controlled study of RGX-314 suprachoroidal delivery for treatment of DR. We\u2019re very excited about the opportunity in DR given the size of this market, which exceeds that of wet AMD, and because we believe this patient population could benefit the most from a potential one-time gene therapy.<\/p>\n

In November, we presented one-year data from dose levels one and two showing RGX-314 to be well tolerated, with patients demonstrating clinically meaningful improvements in disease severity with reductions in vision threatening events. We look forward to providing additional updates on this program in the second quarter of this year.<\/p>\n

Moving to RGX-202 a potential one-time gene therapy for the treatment of Duchenne. RGX-202 is a highly differentiated product designed to deliver a transgene for a novel microdystrophin that includes the functional elements of the C-Terminal or CT domain found in naturally occurring dystrophin. RGX-202 is designed to support the delivery and targeted gene expression throughout skeletal and heart muscle using our NAV AAV8 vector and a well characterized muscle specific promoter.<\/p>\n

Our AAV capsid also represents an alternative for boys who may not be eligible for other AAV mediated microdystrophin therapies due to age or presence of preexisting neutralizing antibodies. In February, we presented exciting interim data from the Phase 1\/2 Affinity Duchenne trial, demonstrating that RGX-202 continued to be well tolerated with no drug related serious adverse events in five patients at both dose levels. All three patients at dose level one showed robust RGX-202 microdystrophin expression and reduction from baseline in serum creatinine kinase or CK levels, supporting evidence of clinical improvement.<\/p>\n

RGX-202 microdystrophin expression from the third patient at dose level 1 was measured to be 83.4% compared to normal control at three months, the highest expression seen thus far. Importantly, we have seen RGX-202 activity in every patient and across a broad age group of both younger and older boys.<\/p>\n

Coming up next week at the MDA Conference, we\u2019re excited to share new program and data updates from the Phase 1\/2 Duchenne trial. We also look forward to sharing initial strength and functional assessment data later this year. Also in February at the WORLD Symposium, we announced that the CAMPSIITE pivotal trial of RGX-121 for the treatment of MPS II met its primary endpoint with high statistical significance.<\/p>\n

Patients treated with RGX-121 achieved decreased cerebrospinal fluid, CSF levels of D2S6, a key biomarker of brain disease activity to below maximum attenuated disease levels. We remain on track to file a BLA in 2024 under the accelerated approval pathway, using CSF D2S6 as a surrogate endpoint reasonably likely to predict clinical benefit.<\/p>\n

To conclude, we have made significant progress with data updates and trial progression across all programs in our pipeline.<\/p>\n

Lastly, I\u2019d like to thank the patients, families, clinicians and patient advocacy representatives who have supported all of these programs.<\/p>\n

And with that, I turn the call over to Vit to review our financial guidance.<\/p>\n

Vit Vasista<\/strong><\/p>\n

Thank you, Steve. REGENXBIO ended the quarter in year end on December 31, 2023, with cash, cash equivalents and marketable securities totaling $314 million compared to $565 million as of December 31, 2022. The decrease was primarily driven by cash used to fund operating activities in 2023.<\/p>\n

R&D expenses were $232 million for the year ended December 31, 2023, compared to $242 million in 2022. The decrease was primarily attributable to clinical trial and manufacturing expenses for ABBV-RGX-314, resulting in an increase in development cost reimbursement from AbbVie under our eye care collaboration.<\/p>\n

We expect a balance in cash, cash equivalents and marketable securities of $314 million as of December 31, 2023 to fund our operations into the second half of 2025. This cash runway guidance is based on the company\u2019s current operational plans and excludes the impact of any payments that may be received from AbbVie upon the achievement of development or commercial milestones under our RGX-314 collaboration.<\/p>\n

With that, I will turn the call back to Ken to provide final thoughts.<\/p>\n

Ken Mills<\/strong><\/p>\n

Thanks, Vit, thanks Steve. 2024 our plans are intended to generate significant value for our shareholders as we ensure that resources are allocated to our most valuable product candidates and to accelerate the development of these candidates. As outlined here today and supported by the press release announcements, we\u2019re motivated to expand value by addressing important unmet need in patients.<\/p>\n

We plan to achieve this in our eye care partnership with AbbVie using our potential one-time treatments by sustaining vision, health long-term and overcoming clinical challenges of managing retinal disease. Our operational goals with AbbVie are directed at completing work and assessments needed to support initiation pivotal trials for RGX-314 using in-office suprachoroidal delivery and completing enrollment of our ongoing pivotal trials for RGX-314 using sub-retinal delivery, which underpins our filing strategy for global regulatory submission by the end of 2025 through the first half of 2026.<\/p>\n

Initial efficacy data from the first patients treated with RGX-202 is enabling us to accelerate this program. Duchenne is a market where there\u2019s a large unmet need for new therapies and that is capable of supporting multiple gene therapies, and we believe RGX-202 has a unique, differentiating set of features that support its potential to be a best-in-class product. We\u2019re taking steps to initiate a pivotal trial for RGX-202 this year.<\/p>\n

Our recent top-line pivotal data supports that we are meaningfully changing the course of disease in boys with MPS II by restoring their missing gene function. Based on these data, we\u2019re working to file a BLA as quickly as possible. By the end of this year, everything in our pipeline should be initiating pivotal stage, fully enrolled at pivotal stage or under a filed BLA.<\/p>\n

As a result of these recent updates and upcoming near-term milestones and milestones throughout 2024 announced today, we believe REGENXBIO is well positioned for success this year and in the long term.<\/p>\n

So thanks everybody for your time today. We hope that you share our enthusiasm about these recent updates about the impact that our treatments and treatment candidates are having on patients, and we also ask that you join us later this week in honoring Rare Disease Day.<\/p>\n

With that, I will turn the call over to questions. Operator?<\/p>\n

Question-and-Answer Session<\/strong><\/p>\n

Operator<\/strong><\/p>\n

[Operator Instructions] Our first question will come from the line of Gena Wang with Barclays.<\/p>\n

Gena Wang<\/span><\/strong><\/p>\n

Thank you for taking my questions, also congrats on the clinical progress here. So, regarding the data update for both RGX-202 and RGX-314, one is next week and the other two is a later 2024. So could you please lay out the additional data points that we will be able to see?<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes, thanks, Gena. We\u2019re not able to give that level of fidelity here today with respect to the MDA Conference next week. We plan to have new data and updates about the program, and we\u2019re also under an embargo status with respect to the conference. So there is currently scheduled, though a investigator presentation at the conference next week, and also some posters that we have submitted previously as part of anticipated updates. And now we\u2019re able to give more clarity that there will actually be new updates left next week on RGX-202.<\/p>\n

With respect to RGX-314 suprachoroidal, we\u2019re just continuing to share the data and the progress that we see happening with both wet AMD and diabetic retinopathy. We just a few weeks ago, about a month ago, made the Hawaiian Eye update and at the end of last year at AAO, we had the diabetic retinopathy suprachoroidal update. So more time has gone by, more work by the program teams, so there\u2019s going to be updates that include new data and new program updates we anticipate Q2 and mid-2024 with respect to suprachoroidal.<\/p>\n

Gena Wang<\/span><\/strong><\/p>\n

Thank you.<\/p>\n

Operator<\/strong><\/p>\n

Our next question will come from the line of Vikram Purohit with Morgan Stanley.<\/p>\n

Gospel Enyindah-Asonye<\/span><\/strong><\/p>\n

Hi, everyone. This is Gospel on for Vikram. We have one question for the RGX-202 program. Since the last update, do you have any updated commentary on the baseline characteristic, patient characteristic for patient three that may have contributed to the higher level of microdystrophin expression and reduction in CK levels for patient one and two?<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Hi, Gospel. Thanks for the question.<\/p>\n

I think no new information since we updated last time, and all the patients enrolled in the trial are meeting inclusion criteria, therefore have backgrounds that are sufficiently similar. Obviously, we\u2019ve got a wider age range here in terms of enrollment, four to eleven than I think what people have been used to seeing from different data sets.<\/p>\n

This particular patient was 6.5-year old, and I think we were really enthusiastic about this being the largest increase in microdystrophin. I think we attribute to just some of the natural heterogeneity that can exist in the progression of the disease. And we certainly see this at the high end of the range of expression in terms of things that have been reported in general, including by other sponsors.<\/p>\n

But I think it really, for us, reflects the robustness of the treatment, and we\u2019re going to be excited as we get into dose level 2 to be able to continue to reinforce that RGX-202 is highly expressive and also contributes meaningfully to, hopefully, improvement in these boys.<\/p>\n

Gospel Enyindah-Asonye<\/span><\/strong><\/p>\n

Thank you very much.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Thanks.<\/p>\n

Operator<\/strong><\/p>\n

Thank you. Our next question will come from the line of Alec Stranahan with Bank of America.<\/p>\n

Alec Stranahan<\/span><\/strong><\/p>\n

Hey, guys, thanks for taking our questions, just two from me.<\/p>\n

First, on RGX-314, we\u2019ve obviously seen increasing focus recently on other companies developing gene therapies for wet AMD, but obviously you guys are still furthest ahead. Maybe thinking beyond an approval, and I realize there\u2019s a lot of uncertainty to get to that point. But assuming RGX-314 gets approved, what kind of competitive moat do you see being formed? Is this a scale advantage, having AbbVie as your launch partner, wealth of data from the pivotal program, or maybe something specific to RGX-314 itself; any thoughts here would be great? And then I\u2019ve got a follow up.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. Maybe all of the above, Alec. I mean, I think the real emphasis for us with RGX-314, both in terms of how far along we are in development and the partnership with AbbVie and the investment that\u2019s being made in its development, particularly on the long-term outcome side. I mean, we have evidence of sustaining vision in patients and vision health long-term up to four years. And with that we\u2019ve even seen improvement in vision in some patients at three years and beyond four years from a single injection and that is with more than overcoming. That is with patients who have never needed an injection since they received RGX\u2011314 in some circumstances. So that addresses the overcoming the sort of day-to-day challenges that physicians and patients have with respect to managing retinal disease. I think that evidence of durability and that focus on vision is going to be incredibly important in the clinical and commercial setting.<\/p>\n

Steve, I don\u2019t know if you want to comment about how you\u2019re thinking about that with the medical teams and how that translates.<\/p>\n

Steve Pakola<\/span><\/strong><\/p>\n

Yes. I think the durability as you mentioned, and certainly the opportunity to have this big of a database of patients and patient exposures, combined with the durability that we can show, and when you throw in the VA stability and even improvement in the setting of a dramatic reduction in treatment burden, that\u2019s really unparalleled compared to any of the competitors out there, when you think of the combination of durability, reduction in treatment burden with the VA findings. So our investigators repeat this over and over again when they refer to the kind of results that we\u2019ve seen to date.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

And AbbVie\u2019s partnership and thoughtfulness and views that have come to bear on thinking about how to influence clinical development, clinical development decisions and the positioning of things late stages. We complete enrollment in pivotal trials for atmosphere and ascent, especially ex-U.S. have been phenomenal. I mean, they\u2019re just \u2013 they\u2019re obviously a great global partner with a global footprint and an unbelievable engine for really tuning into the patient and in this case the retinal specialist experience to reinforce what they need. But I really believe it\u2019s about long-term vision health and that\u2019s the differentiation that we see with RGX\u2011314.<\/p>\n

Alec Stranahan<\/span><\/strong><\/p>\n

Okay, great. That\u2019s helpful.<\/p>\n

And then maybe one quick one just on the cash runway, some big events anticipated that could trigger milestones from AbbVie over the next 12 to 18 months, let\u2019s say. But are there any other levers you guys can pull to push this past second half 2025 if needed, or are you pretty comfortable with the set up in regards to the runway? Thanks.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

I think we said after we introduced our updated strategic plans last year and the cost reductions, that we were as a company and our Board of Directors very focused on enhancing value for shareholders. And that meant focusing on very high potential opportunities with differentiation, commercial opportunities that were meaningful. It involved some hard choices, and some of those choices were reduction in burn. We\u2019ve been seeing early on this year that we\u2019ve been achieving those goals and continue to be on track to not only maintain that guidance, but continue to be confident in it.<\/p>\n

And I think with respect to that basket of milestones, I mean, having just reported the top line data for RGX-121 pivotal, and seeing that being able to share that for the first time, and some of the other observations like the reduction and changes in enzyme replacement therapy continuation. Feeling really confident about the BLA filing, really working as quickly as possible to get that on track. Of course, with the BLA approval we\u2019ve expected that we could be eligible for a PRV. And talking today about the notion of updated data and updated progress on suprachoroidal positions us for the ability to achieve some of those additional milestones, as well as part of the AbbVie partnership.<\/p>\n

So I just think a few months removed from the updated strategic plan and the focus, we\u2019re really enthusiastic about the momentum that we have with the science and with this plan right now. I think the capital is in a good place.<\/p>\n

Alec Stranahan<\/span><\/strong><\/p>\n

Thank you.<\/p>\n

Operator<\/strong><\/p>\n

Thank you. Our next question will come from the line of Ellie Merle with UBS.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Hi, this is Sarah [ph] for Ellie. Thanks so much for taking our question.<\/p>\n

I guess two quick ones from us. Can you talk about your most recent thoughts on expectations into initial strength and functional data from RGX-202 later this year? And then also, can you remind us, is longer term data from the suprachoroidal RGX-314 program gating to starting Phase 3 or potentially we could start a Phase 3 before we see that data? Thanks so much.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Thanks, Sarah. With respect to strength and motor function data. Over the course of 2024, we\u2019ve guided that we expect to be able to achieve that and share that for both dose level 1 and dose level 2. I think with the microdystrophin expression that we\u2019ve been seeing to date with dose level 1, we continue to be really enthusiastic about the fact that there\u2019s an approval endpoint that has been supported by the FDA. It\u2019s therefore been labeled as a surrogate that\u2019s reasonably likely to predict clinical benefit. And the clinical benefit that we\u2019re all looking for here is improvement in strength and motor function in these boys and daily activity things, as well as routinized assessments for those.<\/p>\n

So, no, I think we\u2019re on track. The guidance that we\u2019re giving is still to progress through with microdystrophin updates, additional data about how we\u2019re going to be making sort of pivotal dose decision, which is really going to be weighted towards microdystrophin data and safety data. And then by the second half of the year as we\u2019ve migrated towards our final plan for initiation of pivotal trial, I think then that strengthened motor function data will be more mature and will be something that really will start to cross communicate not only with pivotal plan, because that\u2019s really going to be an accelerated approval strategy based on microdystrophin, but it\u2019ll start to set up the conversation about confirmatory evidence as well.<\/p>\n

So I think everything\u2019s on track as we\u2019ve expected it could be by now. And again, we\u2019re going to have another update just announced today with some new data at the muscular dystrophy associated conference next week to continue to let this story breathe throughout 2024.<\/p>\n

Steve, on the second question?<\/p>\n

Steve Pakola<\/span><\/strong><\/p>\n

Yes. So thanks, Sarah. So you mentioned long-term data, how much do we need in suprachoroidal before we\u2019re thinking about Phase 3? I think it\u2019s important to mention that, for example, with diabetic retinopathy, we know what is an acceptable pivotal endpoint and its use of the validated DRSS scale. And we know that that\u2019s at a one-year time point and we know, as Ken mentioned we fortunately late last year were able to present one-year data from dose levels 1 and 2, where they both were well tolerated.<\/p>\n

And we were seeing not only proof of concept, but exactly what we\u2019d want to see in terms of improvement on diabetic retinopathy severity and a dramatic reduction in vision threatening events. So that really puts us in the AbbVie in a good position as far as assessing the potential to move into later stage development. But we\u2019re not in a position to give any more details or any kind of timeline on it, other than to just give you that sense of how we can assess this data, both from a safety and efficacy standpoint.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Great. Thanks, guys.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Thanks.<\/p>\n

Operator<\/strong><\/p>\n

Our next question will come from the line of Annabel Samimy with Stifel.<\/p>\n

Annabel Samimy<\/span><\/strong><\/p>\n

Hi. Thanks for taking my question.<\/p>\n

Just to follow-up on the DMD program in terms of the dose selection between dose 1 and 2 for moving into the Phase 3, you just mentioned microdystrophin levels and safety data. But I guess to get a little bit more granular, is there a level you\u2019re aiming for as far as microdystrophin expression that correlates better with potential functional benefit that you\u2019re looking for, or just trying to determine whether you can probably reach a broader swath of the population with as high dystrophin and levels as possible, as long as that safety stays intact? So that\u2019s my first question.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. I mean it\u2019s a great question, Annabel. I think we\u2019re drawing on several different resources right at this point in terms of how we\u2019re thinking about pivotal dose determination, and we\u2019ve guided to the fact that that\u2019s a mid-year decision for us.<\/p>\n

First, we\u2019re clearly impacted by microdystrophin levels that we\u2019ve seen at dose level 1 and we\u2019re excited. I mean, we\u2019re seeing signal in a wide range of boys in all boys, age range wise, and we\u2019re seeing differences, but I think that in some cases they\u2019re explainable. I mean, in older kids, I think there\u2019s some evidence of additional progression in disease. So we have an over ten-year old, had a lower level of microdystrophin and in that particular case that may be something where a dose level 2 will be important.<\/p>\n

In the other boys, the four year old and the six year old, to date, we\u2019re seeing things that are well within the range of the product that\u2019s already approved on the basis of accelerated approval and evidence that in other cases, with other sponsors they\u2019ve seen forms of improvements in boys in terms of strength and motor function at these types of levels. So again, the enthusiasm at dose level 1 is very high.<\/p>\n

And we look at our preclinical data and we brought this forward last year as well. We reran some preclinical studies directly comparing dose level 1 and dose level 2 in MDX mice, and we see separation, we see better results with dose level 2. And so to the extent that that data directs us as well, if dose level 2 is safe, which it has been reported to date and continues in our view to be. It\u2019s going to be hard to want to step away from that, because I think we\u2019re just naturally going to expect.<\/p>\n

More is going to get us more expression. More expression is going to get us improvement in function. So I think we\u2019ll keep playing that out in the first evidence of dose level 2 expression and other observations are going to be important contributions to that. And that\u2019s why starting next week and into the middle of the year, we have expectations that we\u2019ll be getting more data to sort of help shape that entire decision.<\/p>\n

Annabel Samimy<\/span><\/strong><\/p>\n

Okay. And is there any chance that you move forward with two doses or is that not something that\u2019s done in gene therapy?<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

No, it\u2019s not something that I think we \u2013 of course, we\u2019ve done that in ATMOSPHERE, in ASCENT, in Retina, as well as anyone that can be more commonplace and for masking purposes and other reasons, probably good reasons to do that in some of the retina settings. But for rare diseases and with respect to MPS II, I think as well as Duchenne, I think we\u2019ve been focused on single dose trials with the doses that can provide the greatest evidence of not only the gene turning on the proteins themselves expressing but in these phases of development, the strongest evidence of both safety and functional benefit.<\/p>\n

And so it will be two or one, and the preclinical evidence says it\u2019s two, but the clinical evidence right now says one is really good. So I find for us that\u2019s actually not dissimilar to things we observed with RGX-121, where we were seeing expression dose escalated and ultimately took the highest dose into pivotal with that was a safe dose. And look at what we achieved with respect to the pivotal result there. I think we\u2019re following a similar playbook here.<\/p>\n

Annabel Samimy<\/span><\/strong><\/p>\n

Great. Thanks very much. Appreciate the color.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. Thank you.<\/p>\n

Operator<\/strong><\/p>\n

Our next question comes from the line of Brian Skorney with Baird.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Hey, guys, this is Charlie [ph] on for Brian. I was just \u2013 I wanted to ask a question about RGX-121. I was wondering, looking at the difference between the patients who are greater than two standard deviations below the mean at age equivalent skills, how do you think about the difficulty of showing gain of skills in those patients in terms of, could this affect the label and will this affect your commercial plan? Do you expect those patients to be treated as well? It would just be great to get some color on that. Thanks.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. It\u2019s also a great question because I think we\u2019ve brought forward this really interesting data in terms of stratification. We had a call today. We\u2019ve had calls recently with rare disease families and parents and investigators and partners. And I think one way to answer that, Charlie, is disease stabilization is improvement for families.<\/p>\n

Right now in Hunter and in Duchenne are going to be able to be finding access to things like gene therapy and other care at a point in time where you can expect to see the type of improvement that we\u2019re seeing in the kids that are within two standard deviations of the mean, and usually that\u2019s age correlated. But we\u2019ve decided to step out a little bit under the spotlight of just saying it\u2019s about age and getting kids younger, I mean, that\u2019s certainly true, but it\u2019s not exclusively yet, it is about progression as well. When it comes to thinking about the commercial benefit and the clinical benefit in the commercial setting rather, I have to say, I mean we\u2019ve shown the Baileys and we\u2019re very transparent about what we\u2019re seeing in terms of the different functional indices in the assessments that we do clinically, and that there can be differences.<\/p>\n

What we sometimes talk about less, and though I think is going to be a part of the conversation with payers and in the commercial setting is, when we are seeing stabilization, what impact is that having at home? What impact is that having on family? What impact is that having on sleep patterns, on toileting, on engagement with the boys among their families? And those things are not to be discounted in any way, shape or form. They are more caregiver and patient reported outcomes different than the sort of analyses that we do in these structured forms of evaluating behavior and neurodevelopment.<\/p>\n

So, I think we\u2019ve also, even in this program for RGX-121, had a trial publicly available that we\u2019ve dosed kids over the age of five that are much older than any place that you would even expect to even potentially see the type of stabilization that we\u2019ve shown in the setting so far. And there are things to take away from that that are valuable for patients and families. So, look, overall, I think getting kids earlier, earlier in the progression of the disease, and younger is going to result in some of, I think, the strongest outcomes when it comes to the literal interpretations of neurological development, behavioral development, fine motor skills, and so forth. But there\u2019s a lot of kids, I think, that also can benefit from gene therapy on the basis of that stabilization comment.<\/p>\n

And those are also some of the kids that may benefit from the discontinuation of enzyme replacement therapy, which, while it may not be something that is part of the label initially, I think it\u2019s going to creep into the clinical and commercial consciousness over time. So, I feel like RGX-121 is a very strong clinical data set to support high unmet need across a lot of boys with Hunter.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Yes, definitely. The data is great. So thank you for providing that extra color.<\/p>\n

Operator<\/strong><\/p>\n

Our next question will come from the line of Danielle Brill with Raymond James.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Hey, guys, this is Alex on for Danielle, just kind of a big picture question again on DMD. Curious to know how you interpreted some of the regulatory comments made last week at an FDA biomarker workshop about needing to think about subsequent therapies and impact on patients potentially not being able to get a better gene therapy in the future. Might that imply that [indiscernible] label expansion may be limited to just four to seven years old considering that\u2019s the population that they studied in their placebo controlled trials.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

It almost feels like a loaded question. I think we have, look we are in a mode right now with RGX-202 where we\u2019re just beginning to see what the potential is here. And I think with additional updates and additional data, I think then we can really feel like we can move ourselves into the conversation. We\u2019re there. We have differentiated biology. We have something that I think is an opportunity for a variety of different stakeholders to pause and think about what the innovation of adding the C-Terminal domain to an AAV therapeutic can mean.<\/p>\n

What can it mean from a kind of surrogate endpoint perspective, but also from the longer term outcomes perspective. And I think we appreciate the complexity that in AAV development and in the regulation of AAV, you\u2019re setting things up as precedents in ways that I think are important and need to continue to support innovation. And that\u2019s what we hear and that\u2019s what we see from the approaches that have been taken by the agency in the case of a lot of work that\u2019s going on in gene therapy.<\/p>\n

So I think that, yes, we think that innovation continues to be important. We think that when we\u2019re showing data in older boys, for instance, that we think that that evidence and that information is useful to contribute to conversations within the community and all stakeholders, including regulators, about how to help steer our development plan and our approach and things that may come after us as further improvements. So we like to hear that those thoughts are happening and that those conversations are happening, and we feel it as well in our direct interactions.<\/p>\n

Unidentified Analyst<\/span><\/strong><\/p>\n

Fair enough. Thanks for the color.<\/p>\n

Operator<\/strong><\/p>\n

Our next question will come from the line of Luca Issi with RBC Capital Markets.<\/p>\n

Lisa Walter<\/span><\/strong><\/p>\n

Oh, great. Thanks for taking our question. This is Lisa for Luca. Just a couple on MPS II. So, first, a question on your regulatory strategy. I know you have reiterated that biomarker reduction at four months is sufficient for accelerated approval. However, we know Denali has to run a head to head trial versus ERT as the Phase 2\/3 study, which is five times bigger in six times longer than your CAMPSIITE Phase 2. Is there any chance that the FDA opts to hold RGX-121 to the same standard as Denali? And I have a follow up. Thanks.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Hi, Lisa. Thanks for the question. The target product profile for RGX-121 is specifically focused on addressing the neurological complications of MPS II in kids with known neuronopathic mutations. And that\u2019s where we focused all of our clinical development. That has led to the selection of a pivotal dose and the execution of the pivotal phase of the CAMPSIITE trial. And in that case, it means we\u2019ve enrolled a demographic of kids that are pretty young, in some cases just months old, and not always as progressed in the disease. But sometimes they have siblings or have known neuropathic genotypes that are basically a certainty of their progression and their characterization.<\/p>\n

And that\u2019s the label we\u2019re looking for. We\u2019re looking for the treatment that comes forward with this accelerated approval exercise to be something that is delivered on top of Elaprase to address the high unmet need for the kids who, with neuronopathic mutations, while they still have benefits from things like IV Elaprase, they\u2019re dying from the brain disease. And we\u2019re looking to address that and reconstitute function at the gene level to not only look to achieve, to save them from dying, but also to get them back on the path of either normal growth and development or stabilized growth and development.<\/p>\n

And I think FDA has expressed with us and publicly, a real openness to the use of what is a really well characterized biochemical marker, which is the natural substrate of the enzyme that\u2019s deficient in boys with Hunter syndrome. And just last week, we were at a meeting, including Denali and Ultragenyx and others, lobbying for the use of that biomarker in the setting of accelerated approval. And I saw real meaningful advancement and conversation occurring there. And we\u2019re all working together on this, I should add, I\u2019m pulling for Denali and I\u2019m pulling for treatments for other MPS\u2019s. And I think in the same way that I see the constituents at those places pulling for us and pulling for RGX-121.<\/p>\n

So we don\u2019t control what the FDA does across all the different sponsor programs. I think all we can communicate is that we\u2019ve tried to be very focused on what part of the disease in MPS II, we think RGX-121 can show the most benefit. Design a therapeutic candidate and a set of trials to achieve that. And with feedback all along, I think we\u2019re in an excellent position with our approach to file a BLA as quickly as possible here.<\/p>\n

So, look, there are differences between the different types of approaches and different products, and they have different product profiles and they\u2019re looking to achieve different things. But when it comes to things like using a biomarker to support accelerated approval, when it comes to using that biomarker to assess it as a surrogate endpoint, we\u2019re on the same page with a lot of other people, and we\u2019re really encouraged about where our program is going and hope that that also is, frankly, something that\u2019s an observational change for other programs as well.<\/p>\n

Lisa Walter<\/span><\/strong><\/p>\n

Got it. Super helpful. And just a follow-up from CAMPSIITE. Do you have any plans to share additional biomarker data, such as systemic reduction of GAGs or NFL? Any color would be helpful. Thanks.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

We don\u2019t have any specific guidance right now on MPS II other than filing of the BLA. And I think that\u2019s really where all of the focus, resource, energy, effort and having achieved the primary endpoint based on the trial design, that\u2019s where we are. I think maybe we get into the second half of the year, and as we start to talk more about post filing, what\u2019s happening with respect to the commercial setting and what additional data may be useful to sort of frame out things that get described or defined in label or in terms of things that are helpful. That may be something we focused on, but right now, the focus of the team internally is completing the modules, completing the follow-up of all patients on safety to support the BLA filing the second half of this year.<\/p>\n

Lisa Walter<\/span><\/strong><\/p>\n

Got it. Thanks so much.<\/p>\n

Operator<\/strong><\/p>\n

Our next question will come from the line of Mani Foroohar with Leerink Partners.<\/p>\n

Mani Foroohar<\/span><\/strong><\/p>\n

Hey guys, thanks for taking the question. Obviously there\u2019s been a lot of digging in on the pipeline. A quick clarification. You guys laid out in your financial guidance that you\u2019ve got cash runway. It looks like the back half of 2025, but you do delineate in the press release a number of NAV Technology Platform licensees that you define as having meaningful milestones throughout 2024. I think you call out Ultragenyx, Rocket, Novartis specifically with memory serves, could you walk through this year and highlight individual events that would result in cash flows coming to you guys or in you changing the accounting treatment and value carried on your financial statements for any of these licensee programs? Just trying to understand what that means for you guys financially or from an accounting basis.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. I think the things we\u2019ve pointed most to Mani in terms of potential impact on balance sheet are the milestones certainly that are associated with the transition of suprachoroidalinto pivotal phase with AbbVie. Those have been the major priorities. And then the potential to achieve a pediatric review voucher upon the approval of RGX-121. And I think our guidance on all of those things have been, they\u2019re event driven, obviously, but there are things that we see the potential for them to occur over the course of our existing execution timeline. And those are hundreds of millions of dollars of individual events. When we start to look at the section on the press release and the history of the company around our NAV Technology Platform licensees, it\u2019s a great and interesting question.<\/p>\n

I mean, obviously the impact of Novartis as we continue to report quarterly sales and annual sales has to this point not really changed our balance sheet since we did the monetization of the Zolgensma royalty, and we continue to see the impact of that being limited over the course of the next year, certainly into 2025. That might change. We\u2019re seeing some evidence of regulatory progress, for instance, on the intrathecal Zolgensma approach, which could change the labeling or change the product availability of the AAV9 expressing SMN. But we\u2019re not planning to include any additional discussion or guidance in terms of thoughts about that impact in the near term.<\/p>\n

When it comes to Rocket and Ultragenyx, I think we\u2019ve identified that they have two or three programs collectively in pivotal phase, and that the approval of those products, the reporting out of pivotal data, may give us a bit more evidence and confidence to talk about the likelihood of achieving milestones for product approvals. And so, again, those are event driven things that could occur as they\u2019ve guided over the course of this year or even into 2025.<\/p>\n

So, I think that\u2019s how we\u2019ve been thinking about identifying and sort of focusing on the NAV Technology Platform, licensees and the drivers of value. I don\u2019t think that in our licenses and maybe the intrathecal Zolgensma could be something that would be an exception to this. But I don\u2019t think that those types of milestones are necessarily at the same level as a PRV or the types of milestones that combined $0.5 billion in milestones associated with AbbVie partnership suprachoroidal progress would be in the same range. They might be, though, I don\u2019t know, five to 10 times less than some of those things on a generalized basis. When you look at the historical benefit of our licensee milestones. Is that helpful?<\/p>\n

Mani Foroohar<\/span><\/strong><\/p>\n

No, that\u2019s really helpful. Thank you.<\/p>\n

Ken Mills<\/span><\/strong><\/p>\n

Yes. Good question.<\/p>\n

Operator<\/strong><\/p>\n

Thank you. This concludes today\u2019s conference call. Thank you for participating. You may now disconnect.<\/p>\n<\/div>\n

Read the full article here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

REGENXBIO Inc. (NASDAQ:RGNX) Q4 2023 Earnings Conference Call February 27, 2024 4:30 PM ET Company Participants Patrick Christmas \u2013 Chief Legal Officer Ken Mills \u2013 Chief Executive Officer Steve Pakola \u2013 Chief Medical Officer Vit Vasista \u2013 Chief Financial Officer Conference Call Participants Gena Wang \u2013 Barclays Gospel Enyindah-Asonye \u2013 Morgan Stanley Alec Stranahan \u2013 […]<\/p>\n","protected":false},"author":1,"featured_media":613,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[236],"tags":[83],"class_list":["post-89967","post","type-post","status-publish","format-gallery","has-post-thumbnail","hentry","category-news","tag-featured","post_format-post-format-gallery"],"yoast_head":"\nREGENXBIO Inc. (RGNX) Q4 2023 Earnings Call Transcript | iFintechWorld<\/title>\n<meta name=\"description\" content=\"REGENXBIO Inc. 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