Welcome to the Biora Therapeutics First Quarter 2023 financial results call. At this time, all participants are in a listen-only mode. A brief question and answer session will follow the formal presentation. If anyone should require operator assistance during the conference, please press Star then 0 on your telephone keypad. As a reminder, this conference is being recorded. I will now turn the call over to Kristy Grabowski Director of IR Communications with LifeSci Advisors, Biora's investor relations firm. Thank you. Please go ahead.
Thank you operator. Good afternoon, and welcome to the Biora Therapeutics first quarter 2023 corporate update and financial results conference call. Joining me on the call are Adi Mohanty, Chief Executive Officer, and Eric d'Esparbes, Chief Financial Officer. Before I turn the call over to Mr. Mohanty, I would like to remind you that today's call will include forward-looking statements within the meaning of the federal securities laws, including, but not limited to, the types of statements identified as forward-looking in our quarterly report on Form 10-Q that we filed or will file later today and our subsequent reports filed with the SEC, which are available on our website in the investors section. These forward-looking statements represent our views only as of the date of this call and involve substantial risks and uncertainties, including many that are beyond our control.
Please note that the actual results could differ materially from those projected in any forward-looking statement. For a further description of the risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements as well as risks related to our business, please see the company's periodic reports filed with the SEC. I will now turn the call over to Adi Mohanty, CEO of Biora Therapeutics. Adi.
Thanks Kristy. T hank you everyone for joining us. Since our last call six weeks ago, we have continued executing on development plans for our NaviCap targeted delivery platform, completing much of the data analysis from this talk study in our BT-600 program with results that are encouraging. With our BioJet systemic delivery program, we made excellent progress with device development and began pre-clinical studies using an autonomous version of our next generation BioJet device. Based on the top-line bioavailability results we shared in March that were more than double our target levels, we progressed rapidly to pre-clinical testing with one of our pharma collaborators. We're also planning to present detailed bioavailability results from our BioJet platform at an upcoming medical conference.
We strengthened our clinical team with the addition of Dr. Ariella Kelman as chief medical officer, which is good timing as we prepare to enter the clinic this year. Moving on to the program updates. First, I'll cover our NaviCap targeted therapeutics platform with our lead program, BT-600, in ulcerative colitis. Currently available therapeutics for ulcerative colitis or UC work by entering the bloodstream and being circulated systemically throughout the body with a limited amount of drug reaching the site of disease in the colon.
Our solution is based on the NaviCap platform, which uses an orally ingestible device about the size of a fish oil pill that is designed to deliver drug directly to the colon using our GI tract localization technology. Our lead program BT-600 is our proprietary liquid formulation of tofacitinib delivered via the NaviCap device. A commercially available version of tofacitinib is approved for the treatment of UC.
Today, tofacitinib is administered orally, and like other orally delivered drugs, it is taken up systemically with a limited amount reaching the area of disease in the colon. By delivering drug where it is needed at the site of disease, BT-600 has the potential to deliver sufficient drug to the tissue of the targeted area to improve efficacy and also reduce systemic exposure, which may improve safety. Global sales for UC drugs are approximately $7 billion per year and growing, we know UC patients are still suffering tremendously with a large unmet need. We believe we can potentially solve one of the primary treatment gaps, which is the inability to achieve high enough drug levels in the disease tissue without systemic toxicity. That's why we're excited about the results that we're seeing from the toxicology study for BT-600.
At the time of our last call in March, we had recently completed execution of our toxicology study for BT-600, during which we administered over 600 drug device combinations in canines. Since then, we have received a majority of the data, and the results continue to look good. All planned devices were administered, and we observed no adverse events or safety signals. Of particular note, there were no safety findings on histopathology of the colon or on blood safety and chemistry tests, including liver function tests, even at the highest 25 milligrams dose of tofacitinib. With the NaviCap platform, our goal is to achieve high drug concentrations in the colon tissue, and we want to see these levels going down between doses and not accumulating.
When we look at drug levels in the blood, we want to see some drug in the blood but at low levels because it is believed that reducing systemic exposure can improve safety. In our previous seven-day canine study, we measured tissue drug levels at six and 12 hours after administration of the last dose and saw tissue concentrations exceeding IC90, which is what we want to see. In this tox study, we measured drug levels in tissue 24 hours after administration of the last dose and saw drug in colon tissues with levels suggesting that the drug does not accumulate over time, which is another favorable sign of safety. Taken in the aggregate, we believe these studies support the ability of BT-600 to deliver high concentrations of drug to colon tissue to potentially drive efficacy and then dissipate in a short enough time to support safety.
In the recent toxicology study, we continued to see peak drug levels in blood at approximately one-quarter of what would be expected with the equivalent dose of commercially available tofacitinib using traditional oral administration. This further supports our desired approach of having lower levels of systemic exposure to potentially reduce toxicity. Final analysis is still ongoing. We anticipate receiving the audited report in the coming weeks. We're also tracking well on progress with other aspects of the program, and we currently remain on track for our planned IND filing in Q3 . We also recently announced that Dr. Ariella Kelman has joined Biora as Chief Medical Officer, bringing valuable experience as an immunologist and strengthening our clinical team.
Ariella's medical background and broad experience with dozens of early-stage and late-stage development programs for therapeutics over her 15-plus years at Genentech will be valuable as we prepare to file our IND for BT-600 and then progress our program into later stages of development. Moving on to our BioJet systemic therapeutics platform. The BioJet platform aims to facilitate systemic oral delivery of drugs that would otherwise require injection or infusion. The BioJet platform is based on an orally ingestible device that provides liquid jet delivery to the small intestine to maximize systemic uptake. The platform has the potential to deliver a broad range of large molecules such as proteins, peptides and nucleic acids without complex reformulation. We believe this platform can help improve disease management and associated patient outcomes and reduce intravenous infusion costs across a range of chronic use indications.
Most of all, we believe this will improve patient convenience, which has been shown to affect patient compliance. These improvements could also help injectable biotherapeutics such as monoclonals become more competitive with alternatives. During Q1, we announced top-line results from preclinical studies with two drugs, adalimumab, a monoclonal antibody, and semaglutide, a peptide and GLP-1 receptor agonist. In the preclinical study with semaglutide, we achieved more than double our target bioavailability using BioJet platform. I'm excited to share that data from this study was accepted as a late-breaking abstract at the American Diabetes Association scientific sessions. We think the acceptance of this abstract as a late breaker indicates the tremendous interest by the scientific community in oral delivery of GLP-1 agonists and other large molecules. We look forward to sharing detailed results from the study at the upcoming ADA meeting in June.
We recently conducted a round of preclinical testing with our collaborator, Ionis Pharmaceuticals, using an endoscopically activated BioJet device with an Ionis antisense oligonucleotide molecule. We're awaiting updates on results of that study and will share more as soon as we're able to. In the few short weeks since our last call, we've also conducted preclinical testing with an autonomously triggered BioJet device. We expect testing to continue through the coming weeks. We remain on track to generate data during Q2 that we believe are necessary to enable our other two pharma collaborators to initiate testing with their own molecules. We look forward to progressing these collaborations and advancing toward our goal of achieving meaningful partnerships for our BioJet platform later this year. We continue to see potential for multiple partnerships over time due to the broad applicability of the BioJet platform to different molecules.
As a reminder, one aspect of our comprehensive patent position for the BioJet platform is a key patent granted last year, which covers methods for using an ingestible device to treat a condition using jet delivery of a GLP-1 receptor agonist formulation to the small intestine to achieve systemic uptake. This puts Biora in a very strong competitive position for providing oral delivery of GLP-1s. With the success of drugs like Ozempic and Mounjaro, we're seeing analyst projections for the GLP-1 market being revised upward to $100 billion annually within the next 10 years. To summarize our anticipated milestones for both platforms. For our NaviCap platform, we remain committed to filing an IND for BT-600 in Q3, and we anticipate initiating our phase 1 trial before the end of the year.
For our BioJet platform, we're continuing development of our autonomous BioJet device with additional preclinical data generation expected during the second quarter of 2023. We also expect to continue to test and initiate new testing of the BioJet device of the molecules of our pharma collaborators. We also look forward to sharing results for our BioJet preclinical study with semaglutide at the American Diabetes Association Scientific Sessions on June 23rd. With that, I'll now turn the call over to Eric for a review of our financial results and capital market activities.
Thanks Adi and good afternoon, everyone. During the first quarter, operating expenses excluding stock-based compensation expenses were $13.2 million, an increase of $1.6 million compared to Q4 2022, primarily driven by higher investment in device development and preclinical activities. Breaking this down, G&A expenses in the first quarter were $8.4 million, including $1.5 million in stock-based compensation expenses, while R&D expenses in the first quarter were $7.2 million, including $0.9 million in stock-based compensation expenses. While spending will continue to fluctuate from month-to-month as we progress towards the clinic, we maintain our guidance of an average monthly operating cash burn of approximately $4 million.
We successfully raised $12.9 million in gross proceeds from our ATM program during the 1st quarter, effectively funding our Q1 operating expenses, leading to a stable cash balance of $30.5 million as of March 31st, 2023. We also continue to make progress with monetizing remaining legacy assets, which might add incremental funding in the near future. Finally we continue to work actively on optimizing our capital structure to maintain and enhance our public company profile and we expect to have some updates before our next call. With that, I will now turn the call back over to Adi.
Thanks, Eric. Biora continues to make strides with both our NaviCap targeted oral delivery platform, where we're focused on entering the clinic with our BT-600 program, and our BioJet systemic oral delivery platform, where we're focused on completing our next gen device and progressing with pharma collaborators. We look forward to providing further updates as we achieve our milestones. With that, operator, we're now ready for questions.
Thank you. We will now be conducting a question and answer session. If you would like to ask a question, please press star then one on your telephone keypad. A confirmation tone will indicate your line is in the question queue. You may press star then two if you would like to remove your question from the queue. For participants using speaker equipment, it may be necessary to pick up your handset before pressing the star keys. One moment please while we poll for questions. The first question is from Mayank Mamtani of B. Riley Securities. Please go ahead.
Hi, this is Yuan, for Mayank. Congrats on the completion of the tox study for BT-600 program, and looking forward to seeing more data updates from you guys. I have a couple of questions, if I may. On the BT-600 program, it's great to see the peak drug level is about one quarter of oral drug. Can you comment on if the half-life in blood is different from the oral route as well? Following on that, can you maybe share the route of clearance following this drug delivery device? Where will the majority of the drug go? I have a follow-up.
Okay. Hi Yuan. You asked about the half-life. Interestingly, what we find is pretty consistent with what is seen in literature about tofacitinib, which is a very typical half-life and clearance. What we impact more is time to reach Cmax and the AUC. We're gonna start getting really technical about these things, but the bottom line is we think we have a better profile where we don't get to that Cmax, which is where people end up with the toxicity issues. We're at about a quarter of what would happen with the regular tofacitinib. However, it behaves the same way as it normally does, which is it clears with a similar half-life and clears out within the same amount of time that it would normally clear out. We don't see accumulation in the blood.
We don't see accumulation in the tissue, which is all good signs that encourage us as we move forward.
Got it. Thanks for the clarification. Regarding the IND filing in 3Q, can you clarify, is the 14-day GLP toxicology study the only experiment you need to file that IND? For this GLP toxicology study, is NHP involved? As you know, there's an industry-wide shortage of NHP at the moment.
We don't have a supply issue. What we need, as you know, for an IND, primarily it's a safety study that with this tox study we're completing, but there's several other aspects. There's stability data, there's all the CMC sections, and we've been generating stability data, which continues to look encouraging. All of those things we are already in progress, creating all that data. We'll be receiving final reports on the safety studies over the coming weeks. Which is why we keep thinking, look, with what we've seen so far, it gives us confidence in being able to be in a position to file our IND in Q3.
Got it. Thanks for taking our questions.
The next question is from Joe Pantginis of H.C. Wainwright. Please go ahead.
Hey, everyone. Matt on here for Joe. Two questions from us on the GLP-1 BioJet program. The first one, I was wondering if you can maybe preview the types of data that you might be presenting at the ADA meeting. Second, you know, given the popularity of the GLP-1 agonists, do you have any other additional updates around the potential partners or partner conversations you're having for the program? Is there any potential to keep it in-house? Thank you very much.
Okay, Matt. In next month, as we said, we're gonna be presenting data. That data is all the data that we generated with our next generation device, which is the device that we are currently continuing to test. We're really excited about it. As we mentioned, we got, you know, greater than 2x our target. Just as a reminder, our target is around 15% bioavailability and we were able to get more than 2x of that. The numbers were, I think we announced, were somewhere in the 37% range. What we couldn't share was the details of the various animals and all the tightness of the CV. We'll be sharing how consistent and how well it performed with multiple animals in that study. That's pretty interesting. It's...
You're right, there's a lot of interest in the GLP-1s right now. There's a significant amount of news that is being created. Yes, we get questions all the time. The fact that we also have this broader GLP-one patent, which is to do with, you know, all kinds of GLP-1 molecules that might wanna be administered with a jet system internally like we do with our BioJet program. We do have options to keep some of that in-house. Our conversations with our BioJet platform are pretty broad, pretty wide, ranging in terms of number, types of molecules, disease areas. We absolutely think that, as we get past having collaborations and partnerships, we can and will have in-house programs that we will take forward.
Our goal this year is to stay focused and streamlined, get our NaviCap program into the UC patients, get a phase 1 started, get the data generated in the BioJet program to create these opportunities for collaborations and partnerships. We do have enough IP as well as data generated to create our own program where we could take, for example, potentially an oral alternative to the injectable GLP-1s. That is absolutely something we could and would look at doing. The near- term clarity in the company and our goal is stay focused. Over the next few months, we could have some very, very interesting data generated, and that's something that will help us with what we plan to do in the future.
Yep, great. Totally makes sense. Thanks for the updates.
At this moment, there are no further questions. I would like to turn the floor back over to Adi Mohanty for closing comments.
Thank you all once again for joining us for our Q1 2023 financial results call. We're really happy with the progress we're making and look forward to keeping everyone updated as things progress. Thank you.
Ladies and gentlemen, that concludes this conference. Thank you for joining us. You may now disconnect your lines.