Q2 2023 Moleculin Biotech Inc Earnings Call

Participants

Jenene Thomas; IR; Moleculin Biotech, Inc.

Walter Klemp; Founder, President, CEO & Chairman; Moleculin Biotech, Inc.

John Paul Waymack; Senior Chief Medical Officer; Moleculin Biotech, Inc.

Jonathan Foster; EVP & CFO; Moleculin Biotech, Inc.

Jonathan Aschoff; Analyst; Roth MKM

Jeff Jones; Analyst; Oppenheimer & Co. Inc.

Presentation

Operator

Hello, and welcome to the Moleculin Biotech quarterly update conference call and webcast. (Operator Instructions) As a reminder, this conference is being recorded. It's now my pleasure to turn the call over to your host, Jenene Thomas, Investor Relations. Please go ahead, Jenene.

Jenene Thomas

Thank you, Kevin. Good morning and welcome, everyone. At this time, I would like to remind our listeners that remarks made during this webcast may state management's intentions, beliefs, expectations, or future projections. These are forward-looking statements that involve risks and uncertainties.
Forward-looking statements on this call are made pursuant to the Safe Harbor provisions of the federal securities laws and are based on Moleculin's current expectations, and actual results could differ materially. As a result, you should not place undue reliance on any forward-looking statements.
Some of the factors that could cause actual results to differ materially from those contemplated by such forward-looking statements are discussed in the periodic reports, Moleculin files with the Securities and Exchange Commission. These documents are available in the Investors section of the company's website, and on the Securities and Exchange Commission's website. We encourage you to review these documents carefully.
Additionally, certain information contained in this webcast relates to, or is based on studies, publications, surveys, and other data obtained from third-party sources, and the company's own estimates and research. While the company believes these third-party sources to be reliable as of the date of this presentation, it does not independently verify and makes no representation as to the adequacy, fairness, accuracy, or completeness of [or that] any independent source of verified information obtained from third-party sources. Any data discussed regarding clinical trials in progress are considered preliminary and subject to be changed.
Joining us on the call today from Moleculin's management team are Walter Klemp, Chairman and Chief Executive Officer; Dr. John Paul Waymack, Senior Chief Medical Officer; and Jonathan Foster, Executive Vice President and Chief Financial Officer. I would now like to turn the call over to Mr. Klemp, Chairman and CEO. Wally, please proceed.

Walter Klemp

Thanks, Jenene, and thanks to everyone on today's call for your interest in Moleculin. We reiterated our commitment on our last two quarterly calls that 2023 would be our year of data. And now, the data from our priority pipeline programs are coming into view.
We've now completed the Phase 1b portion of our MB-106 trial. That's the AML trial in Europe, studying the combination of Annamycin with cytarabine, or Ara-C. Importantly, that means we've now established our Phase 2 dose, and have commenced Phase 2 recruitment.
In the meantime, the preliminary CR rate, or complete response rate, for the Phase 1b portion of our AML program looks to be 33%. And as our Senior CMO, Dr. Paul Waymack, will discuss, that's already well above the benchmark used for approval in the class of patients we're targeting.
In our other lead indication of soft tissue sarcoma, we're now seeing 73% of subjects exhibiting stable disease after two cycles of treatment. Again, this is above expectations at this stage of STS lung metastases, and indicative of an encouraging efficacy signal.
As always, I should stress that these data are preliminary, and subject to change. But so far, we are very encouraged by what we're seeing.
So when we look at the milestones we've set out for this year with Annamycin, we've already delivered on the first three, and we have more to come. Specifically, we expect to be announcing Phase 2 data for AML, and more Phase 2 data for STS, which we intend to do with each quarterly and year-end call. And let's not forget that there's ongoing development work in our other two technologies, and that should be generating news flow yet this year.
But we know that the main focus for most investors is on Annamycin. And here to discuss that in more detail is our Senior Chief Medical Officer, Dr. Paul Waymack. Paul?

John Paul Waymack

Thank you, Wally. I'll get right into it. For our lead compound, L-Annamycin, we continue to generate favorable clinical data from our ongoing Phase 1b/2 clinical trials of Annamycin, in patients with soft tissue sarcoma with lung metastases and in patients with acute myelogenous leukemia -- that is AML.
We believe we are positioned to complete both trials early next year. Our soft tissue sarcoma trial, MB-107, is a combined Phase 1b and Phase 2 trial. For the combined Phase 1b and Phase 2 components, we have enrolled and treated a total of 26 patients with at least two cycles of therapy. I should note that completion of two cycles occurs every six weeks and is immediately followed with a CT scan to assist tumor status. Now among these 26 patients, we have achieved a 73% rate of stable disease.
Similar results have been seen in the 15 patients who are being treated in the Phase 2 component of the study, wherein we have a 67% rate of stable disease after the first two cycles. During the remainder of the second half of this year, we anticipate reporting additional interim data, including topline progression-free survival data and overall survival data.
In our ongoing Phase 1b/2 MB-106 clinical trial, which is in patients with refractory and relapsed AML, we have had six patients complete the dose escalation Phase 1b portion of the study. This 1b portion of the study has identified 230 milligrams per meter square as the dose to be used in the Phase 2 portion of the study.
And we are now enrolling patients in the Phase 2 portion of the study. We should note that the Phase 2 portion of the study is enrolling not only patients with refractory and relapsed leukemia, but also patients for whom Annamycin will be the first-line therapy.
We were not only pleased that the Phase 1b portion of the study identified the dose of Annamycin to be used in the Phase 2 part of the study, but that it also resulted in two of the six patients achieving a CR or CRi. That is a 33% CR plus CRi success rate.
Now again, we want to stress that these data are preliminary and subject to change. But I would also add, for perspective, that we have seen recent new drug approvals in AML based on lower levels of complete response. So we are very encouraged by the data so far.
Finally, let me note that we continue to monitor closely for evidence of any cardiac toxicity in all patients treated with Annamycin. And yet, we have still not had a single patient in any of our trials exhibit any signs, symptoms, lab results, EKG results, or imaging results that have shown evidence of heart damage.
During the second half of this year, we anticipate presenting the study report from our prior successful MB-105 monotherapy with Annamycin in patients with AML study. We also anticipate presenting updates on our ongoing MB-106 study. I am very encouraged by what we are seeing, and for the potential for Annamycin for both of our lead indications.
Moving on to our immune transcription modulator, we continue to make progress in creating an intravenous formulation of our WP1066 drug. Simultaneously, we are having discussions with multiple academic institutions to initiate investigator-sponsored clinical trials or programs for the treatment of adult and pediatric tumors of the brain.
During the second half of this year, we hope to report topline results from an investigator-initiated Phase 1 study in pediatric brain tumors. We will also continue to seek external funding opportunities for investigator-initiated clinical trials. And we'll provide updates on our IV formulation development.
Regarding our WP1122 glycosylation inhibitor, we have opened an IND to initiate a Phase 1 study for the treatment of glioblastoma -- that is brain tumors, brain cancers. We have also been granted orphan drug designation from FDA for the treatment of glioblastoma-type brain tumors.
During the second half of this year, we hope to report preliminary findings of the National Institute of Health -- that is the NIH-funded animal testing studies with the Tacaribe arenavirus. And we will continue to seek external funding opportunities for an investigator-initiated clinical trial. Jon, onto you.

Jonathan Foster

Thanks, Paul. Based on our current Phase 1b/2 activities and ramping up for future programs, our $32 million of cash on hand at the end of Q2 should take us into the third quarter of 2024. The planned funded activities include our current trials and also beginning Phase 3 [talk] studies, and other preparations for future possible AML and STS trials with Annamycin. We continue with our financial focus on advancing Annamycin in clinical studies and finding an IV formulation for WP1066.
R&D expense declined slightly in the second quarter versus the prior year quarter, as we were running three clinical trials: MB-106, MB-107, and MB-301 last year. Now, we are focused on MB-106 and MB-107, and moving Annamycin forward in future clinical studies. G&A expense decreased as a result of reduced legal expenses.
In our last shareholder meeting process, we spoke with numerous shareholders, and they voiced their concern over potential naked short selling and stock price manipulation. We heard you, we are aligned, and we agree that we should do everything possible to guard against this. Recently, we engaged Share Intelligence Services (sic -- see press release, "Shareholder Intelligence Services") to monitor trading activity in our stock, stock ownership, and significant movement of ownership to provide us with more knowledge on our trading activity. Wally?

Walter Klemp

Thanks, Jon. Well, I'm sure from our discussion today, it's clear that we are laser focused on clinical execution right now. And the payoff should be in important data readouts over the coming quarters. These data will play two critical roles: continuing to communicate efficacy in both STS and AML, as well as informing the pivotal clinical trial designs that we will begin negotiating with regulatory authorities.
And as Jon mentioned, we are in a solid position of having sufficient capital to reach what we believe are key data and regulatory milestones along the way. But perhaps most importantly for shareholders, we believe the data rolling in over the balance of the year will begin to address the disconnect we see between our current share price and what we believe is the real potential value of Moleculin. Well, Jenene, that covers our prepared slides for today's call, but we'd be happy to answer any questions that people may have.

Jenene Thomas

Thank you, Wally. Kevin, please proceed.

Question and Answer Session

Operator

Certainly. We'll now be conducting a question-and-answer session. (Operator Instructions) Our first question today is coming from Jonathan Aschoff from Roth MKM. Your line is now live.

Jonathan Aschoff

Thank you. Good morning, guys. Jon, just a fast one, one for you first. Is this R&D run rate real or is this kind of temporarily low like last year?

Jonathan Foster

It should be low this quarter and gradually increasing as we move into the fourth quarter and the first quarter of next year, as we prepare for future clinical trials, as I've discussed. We'll have another batch of Annamycin being produced. So that's where we get to the $32 million taking us into the third quarter of next year.

Jonathan Aschoff

Okay, thank you. And I had some of your more defined timing for upcoming catalysts in my last quarterly note than I see now. And [I was wondering] if you could shine a little light on that. Like, are you slowing down to save some money, or what might account for that?

Walter Klemp

So -- (multiple speakers) Jon, let me sort of take the front end of that, but you might want to comment on our specific choice of disclosures. We don't necessarily see anything slowing down. I do feel like some of the progress that we want to make over the balance of the year involves outreach to FDA.
And as you know, Jonathan, that -- timing with regulatory authorities is really a guessing game. And so we want to make sure everybody understands that we're going to start the negotiating process with regulatory authorities, but we don't want to be too specific about the timing of when we're going to have that feedback, because sure enough, if we put a stake in the ground, it will be wrong.
So we're seeing good recruitment in both trials, so we're not backing off the timing there. But we really do want to try to be respectful of the fact that we can't dial in regulatory dialogues with any precision.

Jonathan Aschoff

That's fair. And lastly, why do you think the SD rate was higher when you included the 31 evaluable patients at different doses -- this is STS and ALM, than with just the 15 evaluable patients with the recommended Phase 2 dose? I was just curious why that SD rate was kind of flipped versus what I'd expect.

Walter Klemp

So Jon, you've been closest to crunching all those numbers on a regular basis, do you want to tackle that one?

Jonathan Foster

Yeah, and I think Paul can add in here as well. When you look at the time from initial diagnosis of lung metastasis, we're getting very tired patients. So you're seeing a little difference from the standpoint of the time from initial diagnosis to the time when they enter into our trial.
The last time I looked at it, the median time from initial diagnosis of lung metastasis appear to be around 20 months. So that's very tired patients, from a lung metastasis standpoint. Paul, you want to add some color?

John Paul Waymack

I'll just add lack of color, play statistician, and say that when the numbers are 67% and 73%, unless you got a 10,000-patient study, those numbers, statistically, are just about the same. So I would not put any great emphasis on 67% versus 73% except those are both, in our opinion, really good numbers to have when you look at the literature.

Jonathan Aschoff

Those are very fair answers. Thank, guys.

Walter Klemp

Thanks, Jonathan.

Operator

Thank you. Next question is coming from Jeff Jones from Oppenheimer. Your line is now live.

Jeff Jones

Hi, guys. Congratulations on the quarter, thanks for taking the question. I guess -- you had mentioned updating on data and presenting data; is there a plan to present at a conference, or is this just going to be at your typical quarterly updates?

Walter Klemp

So our reference here was really focused on the quarterly updates. Having said that, we're definitely expecting to have presentations at the upcoming ASH and other -- CTOS and other critical meetings. Certainly, the data will be interesting for those conferences, and we've got folks that will be presenting, but our reference in this call is really to make sure that people understand that you can count on the fact that when we do our quarterly calls, we are going to provide a very thorough clinical update.

Jeff Jones

Great. Appreciate that, Wally. And in terms of the MB-107 STS lung mets study, in the patients being dosed at the RP2D, I believe you have 15 patients evaluable. Were there any PRs or CRs, or do you anticipate sharing waterfall or swimmer plots so we can get some more visibility to what's going on with individual patients?

Walter Klemp

So, Paul, do you want to address this question?

John Paul Waymack

Yes, thank you. First, when we say the data are preliminary, that's definitely the case because at the recommended Phase 2 dose, we still have a lot of patients who are ongoing, who have not yet had progressive disease. So we have patients who haven't even had their initial six-week follow-up scans yet. So these are very preliminary.
We have not yet seen a patient with anything better than stable disease. But considering these are averaging about fourth-line therapy, we are not surprised. And we are very pleased just with such late-stage patients to be able to get 67% to 73% of them to have stable disease at the time of the initial evaluation, especially in light of what the literature shows would be expected from this patient population.

Jeff Jones

Great. Thank you, guys.

Operator

Thank you. We have reached the end of our question-and-answer session. I'd like to turn the floor back over for any further closing comments.

Walter Klemp

Thank you. Again, thanks everybody. Obviously, as we've said in multiple conference calls before this, the data's coming in and so it's actually a pretty exciting time for us. And we're really looking forward to these, especially these next two quarters, just because of the timing of the additional data that's going to be coming in. So please stay tuned. We can't wait to report more data. Have a great day.

Operator

Thank you. That does conclude today's teleconference and webcast. You may disconnect your line at this time and have a wonderful day. We thank you for your participation today.