Q4 2023 Voyager Therapeutics Inc Earnings Call
Participants
Alfred W. Sandrock; President, CEO & Director; Voyager Therapeutics, Inc.
Peter P. Pfreundschuh; CFO; Voyager Therapeutics, Inc.
Todd Carter; Chief Scientific Officer; Voyager Therapeutics, Inc.
Unidentified Company Representative
Jack Kilgannon Allen; Senior Research Analyst; Robert W. Baird & Co. Incorporated, Research Division
Jay Olson; Executive Director & Senior Analyst; Oppenheimer & Co. Inc., Research Division
Philip M. Nadeau; MD & Senior Research Analyst; TD Cowen, Research Division
Ray Forset
Sumant Satchidanand Kulkarni; Analyst; Canaccord Genuity Corp., Research Division
Unidentified Analyst
Presentation
Operator
Good day. Thank you for standing by. Welcome to the Q4 2023 Voyager Therapeutics Earnings Conference Call. At this time, all participants are in a listen-only mode. After the speakers' presentation, there will be a question-and-answer session. (Operator Instructions). Please be advised that today's conference is being recorded. I would now like to hand the conference over to your first speaker today, Peter Pfreundschuh, Chief Financial Officer. Please go ahead.
Peter P. Pfreundschuh
Thank you, and good afternoon. Joining me on the call today is Dr. Al Sandrock, our CEO; and Dr. Todd Carter, our Chief Scientific Officer. We issued our Q4 and year-end 2023 financial results press release this afternoon. The press release and 10-K are available on our website. In a moment, I will turn the call over to Al. Before I do this, I want to remind everyone that during this call, Voyager representatives may make forward-looking statements as noted on Slide 2 of today's deck.
These forward-looking statements include future expectations, plans and prospects. All forward-looking statements are inherently uncertain and are subject to risks and uncertainties that may cause actual results to differ materially from those indicated by these forward-looking statements. You are encouraged to review and understand the various material risks and uncertainties based on the company as described in the company's most recent annual report, Form 10-K filed with the SEC this afternoon. All SEC filings are available on the company's website.
Now it is my pleasure to turn the call over to Al.
Alfred W. Sandrock
Thank you, Pete, and good afternoon, everyone. Please turn to Slide 3. I I'd like to start by defining Voyager's position as an emerging leader in neurogenetic medicine. First, our pipeline. We anticipate having at least four wholly owned and partnered CNS programs in the clinic by the end of 2025 with the potential to generate clinical data in 2025 and 2026. Our most advanced programs are our anti-tau antibody for Alzheimer's disease and our SOD1 gene therapy program for amyotrophic lateral sclerosis, or ALS. I will talk more about both programs in a few minutes.
Second, our platform. Voyager is working to solve the delivery challenges inherent to CNS gene therapies with our TRACER capsid discovery platform. We have demonstrated high transduction in multiple brain areas at relatively low doses with de targeting of the liver and dorsal root ganglion across multiple species. We have also shown blood-brain barrier penetrants across multiple animal species, and we have identified a receptor that is expressed in humans.
Third, partnerships. In January of 2024, we received $100 million from Novartis in a combination of upfront payment and equity investment to develop gene therapies for Huntington's disease and spinal muscular atrophy. This brings our total of partnered programs to 13 with the potential to generate $8.2 billion in longer-term milestone payments. Whereas this is a bio box unquote number, it is not factored into our cash runway guidance. I will note that some of it is becoming real.
Earlier this week, we triggered a $5 million milestone payment upon selection of a lead development candidate for our Neurocrine partnered Friedreich's ataxia program. All of us -- all this has given us a strong balance sheet, which we expect to provide runway into 2027, removing our financial overhang and enabling us to potentially generate value-creating clinical data in 2025 and 2026.
Finally, potential. We have already demonstrated our strength as a leader in CNS capsid technology. We now aim to expand from gene therapy and antibodies into other modalities of neurogenetic medicine, potentially broadening our impact. We continue to explore the potential to leverage receptor X to shuttle non-viral genetic medicines across the blood brain barrier and look forward to sharing data on this in the future.
On Slide 4, I want to take a moment to acknowledge just how much Voyager has achieved recently. Following the Novartis collaboration, we closed a $100 million public offering. We closed 2023 with approximately $231 million in cash. When you add the $100 million from Novartis and the $100 million from the offering that brings us to a pro forma cash number of approximately $431 million as of December 31, 2023.
We are also progressing our GLP toxicology work with our anti-tau antibody, VY-TAU01 for Alzheimer's disease and remain on track for an IND filing in the first half of this year. We achieved two development candidate selections with gene therapy programs, on our wholly owned SOD1 ALS gene therapy and one with our Neurocrine partnered Friedreich's ataxia program. We also generated data with our wholly owned tile silencing gene therapy program, showing robust reductions in human tau mRNA and protein in a mouse model, which Todd will share more on later.
All of these milestones are helping us build a robust pipeline, as you can see on Slide 5. I do want to note that the wholly owned programs at the top of the slide denoted in orange are the only programs we fund. The rest of our pipeline is funded by our partners. While I won't go into detail on all of these today, I do want to dig into some of our wholly owned programs, particularly our anti-tau antibody, our tile knockdown gene therapy and our SOD1 ALS gene therapy.
Moving to Slide 6. When I look at the Alzheimer's space, I'm encouraged by the progress, particularly the approval of 2 anti-amyloid antibodies. I view Tau as the next exciting target in this field. Why? We've long known that the spread of pathological to correlate to the progression of Alzheimer's disease. In fact, Alzheimer's disease progression is characterized by Braak staging, which is based on the spread of pathological tau.
Our anti-tau antibody, VY-TAU01 is differentiated from other approaches based on the epitope targets, which is located in the C-terminal rather than the N-terminal or mid-domain and which has been shown to inhibit the spread of pathological tile by more than 70% preclinical study. We are currently progressing through IND-enabling studies and remain on track to file an IND in the first half of this year.
We plan to initiate a single ascending dose study this year in healthy volunteers, and we plan to initiate a multiple ascending dose study next year in patients with early stages of Alzheimer's disease. We hope to generate proof-of-concept data for slowing the spread of pathological tau via PET Imaging in 2026. I'll now turn it over to Todd to talk about another approach we are developing to target Tau.
Todd Carter
Thank you, Al. Please turn to Slide 7. In addition to our entity tau antibody approach, we are also working on tau side immune therapy. This refer to the (inaudible) interact BDD penetrate AAV capsid to deliver Vectorized how targeted siRNA. As shown, a single intravenous administration of our tau cytokine gene therapy and humanized tau mouse model caused robust reductions in human health RNA and protein. This was observed across multiple bring regions. And in some regions, we have seen up to a 90% reduction to tau RNA.
This quarter will be presented at the 2024 AD/PD Conference. Given these promising data, Voyager has prioritized this program and advanced it to a research, and we anticipate an IND filing in 2026. I'll just echo what Al said here. We see tau is an incredibly important target for Alzheimer's disease. So much so that we are pursuing multiple modalities, both in antibody and gene therapy. We are encouraged by the early data for both of these programs and look forward to continuing to share (inaudible).
In addition, I want to share a little data from our SOD1 ALS gene therapy program. We announced the selection of the development candidate for this program in December 2023. And some of the data behind this decision are shown on Slide 8. As you can see, a single IV dose of our development candidate in none primates resulted in 73% and 82% reduction in SOD1 mRNA in cervical and lumbar spinal cord motor neurons, respectively. These are quite significant reductions in some of the key cell types affected by the disease.
Additionally, we think an added benefit is that the effect is not limited to the spinal cord. When you look at approaches of injecting and medicine eternally, you often see steep grades of effects dropping off once you move away from the injection site. But because our IV approach leverages the vascular system to deliver across the blood bring barrier, we see not only strong map down along the spinal cord but also lowering the brainstem and motor cortex, which we believe will be important in addressing ALS. This program continues to progress toward ID filing mid-2025.
Now I'll turn the call back to Al.
Alfred W. Sandrock
Thank you, Todd. Turning to Slide 9. You can see Voyager has started the year off strong, and we continue to execute on our milestones. We began the year with our second Novartis collaboration, this time to advance gene therapies for Huntington's disease and spinal muscular atrophy. We then raised $100 million through a public offering in January of 2024, providing runway into 2027.
Just this week, we announced the selection of a development candidate for our Neurocrine partnered Friedreich's ataxia gene therapy program, which triggered a $5 million milestone. I want to close by acknowledging all of the hard work of the Voyager team, which has allowed us to progress as much as we have. Looking forward, Voyager is well capitalized to advance at least four wholly owned and partnered CNS programs into the clinic this year and next. And with our financial overhang removed, we look forward to potentially generating value-creating clinical data in 2025 and 2026.
With that, we're happy to take any questions you may have. Operator?
Question and Answer Session
Operator
Yes. Thank you. As mentioned, at this time, we'll conduct a question-and-answer session. (Operator Instructions) Our first question comes from the line of Jack Allen with Baird.
Jack Kilgannon Allen
Congratulations to the team on all the progress made throughout the quarter. My question is fairly high level, but it relates to all three of the assets that you anticipate moving forward towards clinical studies here, be it the ALS program, the Friedreich's ataxia program externally and then the internal Alzheimer's program that you're prioritizing?
How should we think about vector selection across all three of these assets? Do they feature the same vector? Or are they each using novel vectors? And as you move towards the clinic, I guess, to what degree you can you translate preclinical results across these programs and clinical results from an early clinical data to the latest pipeline assets that are going to move forward as well.
Alfred W. Sandrock
Jack, this is Al. I'll start, and then I'll turn it over to Todd for his comments. So with respect to the capsid, we haven't disclosed which capsid. We will be -- every one of these programs will use one of our novel capsids discovered through the TRACER platform. They will be delivered by BBB. And we anticipate we will use doses well below E14 vg/kg because that's where -- those are the doses that have jumping safety issues with other AAV programs.
So -- and we select these capsids based on a capsid profile that we create for every single disease and every single target based on the fact that these diseases reside in different parts of the nervous system and also we want to be sure that we target the cells that are necessary while de targeting the cells that may cause toxicities. That leads us to these case profiles. And luckily, we have an array of capsids we can choose from and our partners can choose from. Todd?
Todd Carter
I don't have a lot to add to your comments, Al, the major points. As Al mentioned, we identified a profile for the capsids that are specifically oriented to each disease that we're going after. Of course, there's a different payload in each case. You're talking about the zero type of a capsid that is effectively the envelope that delivers that payload. And we really try to hit each of those components that Al mentioned to give us the best opportunity for success and to reduce any potential risks of tolerability issues.
Jack Kilgannon Allen
I think Jack had a question about predictability, I think, of preclinical models. And we don't -- we chose targets, Jack, that we think are validated based on human genetics or human studies of other types, including controlled clinical trials. And then what we aim to do is to do pharmacology and animals.
And for us, doing clear pharmacological studies in nonhuman primates, where you don't have the availability of the so-called models of disease. We think that may be just as informative or perhaps more informative to help us choose the right capsid because the size of the animals are obviously different from mice and the delivery characteristics may be more similar to humans. I hope that helps with that part of the question. Todd, do you want to add anything?
Operator
Yes, excuse me. The next question comes from the line of David Hong with Citi.
Unidentified Analyst
This is Sam back on for David. Congrats on the progress. Just if you could provide any color on how we should think about collaboration revenues for 2024. Is there any significant potential near-term milestones for partners that could lead to lumpiness in quarterly revenues?
Alfred W. Sandrock
Steve, do you want to take that?
Unidentified Company Representative
Sure, Al. So we don't provide specific guidance with regards to collaboration revenue, especially new collaborations per se. We have been very fortunate in that as part of today's announcement and what came out earlier this week was further validation that the collaborations that we already have in place, specifically collaboration around the FA program with Neurocrine is advancing and moving forward.
And so that continues to validate the science and the organization and also bring to the company additional cash flow revenues that we had not previously kind of projected as part of our overall cash runway. That's an additional $5 million as we discussed in today's conference call. I do think as you look at our financials for the close of 2023, we do have pretty significant revenues this year, and that was largely driven through originally the first deal that we did with Neurocrine at the beginning of '23, the subsequent option to license agreement with Novartis earlier in the year.
And then, of course, the final collaboration or the second collaboration with Novartis around the SMA program as well as the HD program. So '23 was a banner year for us. I think from a revenue generation and cash flow perspective, obviously, making forward -- we're going to be very open to business development discussions and always open to conversations.
And there could be further revenue generation associated with our capsid platform as you think about 2024 and definitely milestones for our existing 13 programs. So I think it's important to just be mindful that we don't provide guidance here, but we do believe that there could be further revenue generation as we move forward in '24.
Operator
One moment for our next question. This question comes from the line of Jay Olson with Oppenheimer.
Jay Olson
Congrats on all the progress, and thank you for providing the update. We have a question about the TAU01 program since there's some near-term readouts for competing to targeted therapies, including Phase II readouts from an anti-tau mid-domain antibody from Roche and UCB and OGA inhibitor from Lilly. Can you just talk about the potential read across to your own TAU01 program and maybe more broadly to the tower targeting strategy? And then I have a follow-on, if I could, please.
Alfred W. Sandrock
That's a great question. I mean, yes, we are aware that there's multiple antibodies against various epitopes on the tile molecule. And -- there could be some read-through. I would say that we believe that epitope matters a lot, certainly did in the case of the amyloid antibodies and because all the ones that work are in terminal where terminal turned out, the C-terminal and Mid-terminal amyloid antibodies were not as effective. In the case of tau, we chose the C terminal based on animal experiments where we inject human pathological tau into the animal, and we look at the blockade of spread to other brain regions.
And we chose the C-terminal because it was the most robust antibody in blocking that spread. We actually had a number of antibodies against other epitopes and highly specific for pathological tau. So we had to -- we had about half a dozen of those. We had to choose one of them, and we decided that we would use this spreading assay, bioassay in animals to make our decision on which epitope. So it's a long answer to say that I think a positive result just underscores, I think that the towers is a great target to go after, but a negative result maybe because it was the wrong epitope. Now if it's a C-terminal antibody, then we have to take notice there. But again, even within the same region, some antibodies block spread better than others. So even that, we can't take too seriously either. Todd, do you want to add anything?
Todd Carter
I think you captured it. And the point at the end there that Al made was we can identify and through our studies we did antibodies that targeted epitopes very close to one another on cross the tile protein. And some of those antibodies would work quite well in our screening assay and others would not. And it really dependent upon a particular epitope. And I'll just reiterate that in our assays, the PET N-terminal antibodies that have failed in the clinic to date failed in that assay as well. So we're taking something forward that was quite robust and targets pathological tau specifically.
Jay Olson
Great. And if I could squeeze in a follow-up question about recent discussions with the FDA. Can you just comment on their plans to more broadly use biomarkers for the accelerated approval of gene therapies?
Alfred W. Sandrock
Yes, that was -- we read that with great interest. And I applaud the use of surrogate markers, if you will. These are diseases with such terrible consequences for patients. And if we can use a surrogate biomarker to get accelerated approval and then confirm in the confirmatory trial, I think the patients get access to the drugs earlier. And I think it's a valid approach. And I personally think that for the right disease and the right surrogate marker, this is exactly the right approach for patients.
Jay Olson
Great. And maybe just looking at regulators outside the U.S., any takeaways from the positive CHMP opinion for Tofersen?
Alfred W. Sandrock
Well, yes, that's another great example. I mean, as we all know, Tofersen did not meet the primary endpoint, which was a clinical outcome measure, the pre-specified outcome measure of ALS functional rating scale, but it did have a strong effect, the clear cut effect on neurofilament. The U.S. approved based on that as a surrogate biomarker reasonably likely to predict clinical efficacy. And we now just saw last week that Europe essentially followed suit and allowed for person to be approved -- I assume, again, specifically based on the use of neurofilament as the surrogate biomarker.
We'll have to wait for the regulatory -- the EPAR to know exactly what their thinking was, but it's important to note that the only outcome measure that was -- well, the main outcome measure that was positive was the NFL with a lot of strong support from the other clinical outcome measures, but the one that was statistically significant was NFL. So you're maybe thinking along the same lines, I guess, is the point.
Jay Olson
Great. Super helpful. Congrats again on all the progress.
Operator
Our next question comes from the line of Ray Forset with Guggenheim Securities.
Ray Forset
This is Ray Forset from Debjt's team at Guggenheim. Two questions from us. One, could you highlight the features of your VY-TAU01 Phase Ib clinical plan that you would point to as competitive advantages relative to historical or ongoing tau clinical efforts? And our second question is what lessons from Lecanemab and other Albeta targeting therapies would you point to as most informative for the design of a tau-targeting clinical program and specifically your VY-TAU01 program?
Alfred W. Sandrock
Yes. So the VY-TAU01 the Phase II program that we hope to get proof of concept based on tau PET imaging. Our current plan, and we still have more work to do to actually get input from investigators and FDA, obviously. But the current plan is to enroll early-stage Alzheimer's patients, probably a Braak stage 2, perhaps 3 but early stage by Braak staging as well and look for the spread of tau to other regions in the brain or other cortical regions that we know that the toll spread to.
The great thing about Alzheimer's disease is that it's a very stereotypical spreading pattern. So we can look at regions of interest in the brain and see whether or not we're reducing the spread and in some ways, we want to recapitulate the data. We saw quite robustly in the animals that we just talked about earlier where we use human pathological to look at the spread. So whether that's a competitive advantage or whether it's -- I mean we chose the program because we like the fact that we can get proof of concept on the spread of tau very efficiently.
We think we can do it with -- on the order of 25 or so patients for group in a 1-year duration and proof-of-principle on the spread. So that's our current plan. As I said, it's still kind of -- we're still a couple of years away. So that may change, but that's our current plan. In terms of lessons from Lecanemab, well, in a way I mentioned it earlier that epitope matters a lot -- that early-stage patients are probably where you need to go. And then you need to have a robust effect. I mean the other distinguishing feature of Aducanumab and Lecanemab, and Donanemab is that you had a very robust effect on the amyloid PET Imaging in 1 year.
And so we hope to see a robust clear-cut effect on Tau PET Imaging. And if we don't see that, we're not going to move forward. We need to see the fact that we've got not only target engagement, but a clear pharmacodynamics effect on the tile spreading hypothesis, if you will. If you don't see that we're not going to move forward with that program. But as we talked about earlier, we still have the top silencing program behind that, which takes a different approach to a very important target.
Operator
This question comes from the line of Phil Nadeau with TD Cowen.
Philip M. Nadeau
A couple from us. First on the SOD1 program. In the past, you guided towards starting GLP-1 tox for the program in the first half of 2024. We see that you're guiding towards an IND next year. Is the GLP-1 tox on schedule? Any changes to the time lines ahead of the IND filing?
Alfred W. Sandrock
Actually, no, there's been no change in our -- in the timing. This is exactly the time line that we had planned from the very beginning Phil.
Philip M. Nadeau
Perfect. And then second, on the VY-TAU01, a follow-up to the prior question. On the Phase Ia and Ib, appreciating that proof of concept will be generated by the PET scans. What PD markers will be able to look at from the Phase Ia and Ib in advance of getting that PET scan data to make sure you're on the right track. Will it simply be pharmacokinetics? Will you have good data on target engagement or any other PD biomarkers that you'll be able to look at to make sure -- or to ensure that you're on the right track towards producing the PET proof-of-concept data?
Alfred W. Sandrock
Yes. That's a good question, Phil. So on the Phase Ia, that's going to be a single ascending dose study in normal healthy volunteers. So we're not going to get any pharmacodynamics or target engagement data. We will be getting data on safety and PK and try to get to the point where we identify the optimal doses to move into the Phase Ib trial based on safety and PK. And then in the Phase Ib or I may have called a Phase 2 trial, we will be -- there are a whole pathway of tau-related biomarkers we could look at.
The primary one that we're going to pay attention to is Tau PET Imaging because as I said earlier, we will take advantage of the stereotypical spread of tau and look at regions of interest in the brain to test the spreading hypothesis, if you will. But there are a number of additional biomarkers we will be looking at in addition to CSF biomarkers for tau. We will also -- we're lucky to have some blood biomarkers of covalently modified forms of tau that we can look at, such as VYTAU various phosphorylated forms of tau.
And people have seen efficacy on those, certainly the amyloid trials, but also in some of the tau trials as well, for example, a bit of 80tASO that Biogen is pursuing. So I think that we'll look at all of them, but our decision-making, Phil is going to be primarily based on the Tau PET Imaging for the reasons I stated earlier.
Operator
Moment for our next question. This question comes from the line of Joon So Lee with Truist Securities.
Unidentified Analyst
This is maybe on -- for June and congrats on the quarter and thanks for taking our questions. So could you please elaborate on the choice of artificial microRNAs over Vectorized siRNA or shRNA for (inaudible) candidate of yours? And I have a follow-up.
Alfred W. Sandrock
Todd, do you want to take that?
Todd Carter
Sure. Of course, our payloads are the Vectorized siRNA are technically a Vectorized pharma the prior artificial microRNA. We have a lot of experience. We've been doing this for many, many years at Voyager on how to Vectorized these things. You identify the siRNA. It sits within a particular cassette. When expressed, it will get the process as it is processed in the nucleus and exported into the cytoplasm.
We think Vectorizing the siRNA, we can, with a single dose deliver, is digit of level of expression. And these are a catalytic type of approach where the siRNA continues to be used by processing mechanisms of the cell to knock down the mRNA. We know we can get quite specific in targeting of the mRNA involved and our whole process of selecting these lean call, careful attention to things like the processing, the lack of targets and that sort of thing. So we're comfortable and actually very enthusiastic about the siRNA approach we take. Did that answer your question?
Unidentified Analyst
So a quick addition to this question. Is it different from shRNA backbone or (inaudible) backbone of the type of promoters that use?
Todd Carter
I heard shRNA, -- what was you're?
Alfred W. Sandrock
Artificial micron.
Todd Carter
It is effectively an artificial microRNA, but it is entirely artificial in that -- those that we choose do not exist in the endogenous expression, but it is an artificial microRNA. It is different from a shRNA, which those hairpins are involved in other types of processing that resulted in reductions in RNA. So it is distinct.
Unidentified Analyst
And lastly, there have been multiple end terminal targeting antibodies for tau and several for the microtubule binding domain. And it seems that you are the only one with the C-terminal targeting. Can you please provide some insight on how selection of C-terminal has been like less per balance?
Alfred W. Sandrock
Well, thank you. Yes. So it turns out that there are two other companies that are also targeting the C-terminal that we're they aware of, there could be more. But Merck, for example, is in Phase I with a C-terminal monoclonal antibody. And Lundbeck is also in Phase I with the C-terminal targeting antibody. And you're right that there are a couple of -- at least two other -- maybe three other companies targeting the microtubule binding region.
Again, I think many of us, we select these antibodies that are specific for pathological forms of tower. And we had a number against various regions as well. How do you pick which one of those? They're all selective for pathological forms of tau. And so some have chosen, for example, cellular take assays or cellular toxicity assays. We happen to choose the In Vivo spreading assay where you inject human pathological tau into the brain of mice and we look at the spread.
Who knows which one of these assays is the right one to use? I mean it's hard to know until we see the human data to be able to say, "Oh, that's the one that was most predictive." But we like the fact that it's a biological that it's a spreading assay In Vivo that starts with human pathological tau. And so that's why we chose to see terminal directed antibody, but we're not the only ones that chose to C-terminals seems. Go ahead Todd.
Todd Carter
Just a couple of other points. You mentioned the in-terminal antibodies, and those have, I think, almost without fail, they have not succeeded in the clinic. And then I mentioned this earlier, in the in Vivo model that Al described, those antibodies do not work in that model. And so our antibodies are different from those that to date have failed in the clinic.
We've also chosen the epitope and when we say C-terminal, these other antibodies that target the C-terminal region, they target distinct epitopes in the C-terminal region. So even different antibodies in what we might call the C-terminal region, are likely to be distinct from one another as well.
Alfred W. Sandrock
So far, when you look at the enthermal antibody, it seems that the animal has negative predictive value. But we don't know the weather also has positive predictive value. But that's the point I think you were trying to make on the terminal.
Unidentified Analyst
Very helpful. Appreciate it.
Operator
One for our next question. This last question comes from the line of Sumant Kulkarni with Canaccord.
Sumant Satchidanand Kulkarni
It's actually a follow-up to a question that I asked on the last quarterly update and it relates to GLP talks on the anti-TAM antibody. You had mentioned that there were some nuances to running those studies and your slides today say you still expect to complete these studies in the first quarter. So could you share any specifics on what more needs to be done so you can hit your time line for an IND submission in the first half of this year?
Alfred W. Sandrock
Well, the nuances are that it's an antibody that binds specifically to human pathological tau and the typical stock -- so typical tox studies are done in wild-type animals. And to look at on-target toxicity, there is no animal -- wild-type animal that can be used to evaluate on-target toxicity. So the nuance is that you have to do studies in animals that are expressing human pathological tile, otherwise, there's no target. And the problem is that those animals are sick, because they carry human pathological tau. So it's very hard to do long-lasting studies in animals that are sick.
But we've been -- but we have -- look, we have a lot of confidence in the toxicology package we chose -- you'll recall that we did have a pre-IND meeting last year. I think it was almost a year ago, I think it was March of last year, where we had an interaction with FDA. A lot of our work is -- actually all of our work is based on that interaction. And look, we're on track to achieve our goal of filing the IND in the first half of this year. So sometime in the next couple of months or so and we hope to start the first in-human study shortly thereafter.
Operator
Thank you. So at this time, I'm showing no further questions. I would now like to turn the call back to Dr. Sandrock for closing remarks.
Alfred W. Sandrock
Well, I just want to say thank you to everyone for joining us today, and please feel free to follow up directly with any questions. Thank you.
Operator
Yes. Thank you, and thank you for your participation in today's conference. This does conclude the program, and you may now disconnect. Goodbye.
