On August 5, 2021 Oncternal Therapeutics, Inc. (Nasdaq: ONCT), a clinical-stage biopharmaceutical company focused on the development of novel oncology therapies, reported financial results for the second quarter of 2021 (Press release, Oncternal Therapeutics, AUG 5, 2021, View Source [SID1234585850]). Oncternal management will host a webcast today at 5:00 p.m. ET to provide a business update and discuss its second quarter of 2021 financial results.
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"We presented very encouraging data from our clinical programs, expanded our ongoing study of cirmtuzumab for patients with MCL, we continue to progress towards initiating a first-in-human trial of our ROR1 targeted CAR-T, and started evaluating an intensified dosing regimen for TK216, an ETS inhibitor which has generated encouraging results in Ewing sarcoma. Furthermore, we strengthened our management team, and we continue to have a strong balance sheet and look forward to multiple potential catalysts in the coming months," said James Breitmeyer, M.D., Ph.D., Oncternal’s President and CEO.
Recent Highlights
Cirmtuzumab (ROR1 antibody):
In June 2021, we presented encouraging interim clinical data for cirmtuzumab in combination with ibrutinib in patients with mantle cell lymphoma (MCL) and chronic lymphocytic leukemia (CLL) in a poster session at ASCO (Free ASCO Whitepaper) 2021 (NCT0308887). The data remain consistent and confirm and extend previous results. An objective response rate (ORR) of 83% (15 of 18 evaluable patients) was observed for heavily pre-treated patients with MCL treated with cirmtuzumab plus ibrutinib, which compares favorably to the historical ORR of 66% for ibrutinib monotherapy (Rule, 2017). The complete response (CR) rate of 39% for MCL patients treated with cirmtuzumab plus ibrutinib (7 of 18 evaluable patients) also compares favorably to the historical CR rate of 20% for ibrutinib monotherapy, with CRs remaining durable for 8-30+ months. The median progression-free survival (PFS) and overall survival (OS) were not reached for MCL patients with a median follow-up of 18.9 months. The median PFS and OS were also not reached for CLL patients, with a median follow-up of 22.1 months. The combination of cirmtuzumab and ibrutinib continues to be well tolerated, with a safety profile consistent with or slightly improved compared to historical data for ibrutinib monotherapy. For example, in patients with MCL, Grade 3-4 neutrophil decrease was documented in 11.5% of patients with cirmtuzumab plus ibrutinib, compared to 29% for ibrutinib alone from its registration study.
In July 2021, we opened a new treatment cohort of the ongoing Phase 1/2 study to evaluate cirmtuzumab plus ibrutinib in up to 34 patients with MCL who are refractory to prior BTK inhibitor treatment (ibrutinib, acalabrutinib or zanubrutinib), or who are at high risk for progression, having had an inadequate response to ibrutinib (stable disease or partial response).
The investigator-sponsored study of cirmtuzumab and paclitaxel for metastatic or locally advanced, unresectable breast cancer at UC San Diego (NCT02776917) has completed enrollment and the results are expected to be presented at a scientific conference or publication.
The investigator-sponsored study of cirmtuzumab consolidation for treatment of patients with detectable CLL on venetoclax at UC San Diego (NCT04501939) remains active and enrolling patients.
TK216 (ETS inhibitor):
In June 2021, we presented encouraging interim clinical data for TK216 in patients with relapsed or refractory Ewing sarcoma in an oral session at ASCO (Free ASCO Whitepaper) 2021 (NCT02657005). The data remain consistent and confirm and extend previous results. Two patients who achieved a CR remain with no evidence of disease, one for over 24 months and the other for over 14 months on study. The treatments continued to be well tolerated, with reversible myelosuppression as the most common side effect.
In July 2021, we added a new Phase 2 expansion cohort targeting up to 21 Ewing sarcoma patients to evaluate clinical responses to single agent TK216 using an optimized dosing regimen, treating for 28 days per cycle, to intensify the amount of TK216 administered over time.
Corporate:
In Q2 2021, we appointed Salim Yazji, M.D., as Chief Medical Officer and Pablo Urbaneja as Senior Vice President of Corporate Development.
Expected Upcoming Milestones
Cirmtuzumab (ROR1 antibody) programs
Clinical data update for patients with MCL and CLL treated with cirmtuzumab plus ibrutinib in the ongoing Phase 1/2 study in the fourth quarter of 2021
FDA interaction regarding potential registration trial of cirmtuzumab in patients with MCL
Preclinical data in additional ROR1-expressing tumors in the fourth quarter of 2021
ROR1 CAR-T program
First-in-human dosing in the first half of 2022
TK216 (ETS inhibitor) programs
Clinical data update for patients with Ewing sarcoma treated in the ongoing Phase 1/2 study in the fourth quarter of 2021
Preclinical data in additional ETS-driven tumors in the fourth quarter of 2021
Second Quarter 2021 Financial Results
Our grant revenue was $0.9 million for the second quarter ended June 30, 2021. Our grant revenue is derived from a sub-award under a grant from the California Institute for Regenerative Medicine (CIRM) to UC San Diego, which was awarded to advance our Phase 1/2 clinical trial evaluating cirmtuzumab in combination with ibrutinib for the treatment of patients with MCL or CLL.
Our total operating expenses for the second quarter ended June 30, 2021 were $8.6 million, including $1.8 million in non-cash stock based compensation. Research and development expenses for the quarter totaled $5.2 million, and general and administrative expenses for the quarter totaled $3.4 million. Net loss for the second quarter was $7.7 million, or a loss of $0.16 per share, basic and diluted.
As of June 30, 2021, we had $103.7 million in cash and cash equivalents. We believe these funds will be sufficient to fund our operations into 2023. As of June 30, 2021, we had approximately 49.4 million shares of common stock outstanding.
Management Webcast
As previously announced, Oncternal will host a webcast today, August 5, 2021, at 5:00 p.m. ET (2:00 p.m. PT). The live webcast will be available online and may be accessed from the "Investors" page of the company website at View Source A replay of the webcast will be available beginning approximately one hour after the conclusion of the call and will remain available for at least 30 days thereafter.