On August 8, 2024 Aptose Biosciences Inc. ("Aptose" or the "Company") (NASDAQ: APTO, TSX: APS), a clinical-stage precision oncology company developing highly differentiated oral targeted agents to treat hematologic malignancies, reported financial results for the three months ended June 30, 2024, and provided a corporate update (Press release, Aptose Biosciences, AUG 8, 2024, View Source [SID1234645584]).
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"We are pleased that our triplet protocol of tuspetinib with venetoclax and azacitidine (TUS+VEN+AZA) has been allowed to proceed at the 40 mg dose of tuspetinib, a dose that as a single agent and in doublet therapy has been shown to be safe and active," said William G. Rice, Ph.D., Chairman, President and Chief Executive Officer of Aptose. "We – along with our board and outside scientific advisors – strongly believe tuspetinib is an ideal drug for frontline triplet therapy and we remain committed to securing financing to pursue its development for the newly diagnosed AML patient population in desperate need of an improved frontline therapy."
Key Corporate Highlights
Tuspetinib Protocol Now Ready for Triplet Therapy Study – Aptose’s company-sponsored phase 1/2 TUS+VEN+AZA triplet study is designed to test tuspetinib in combination with standard of care dosing of azacitidine and venetoclax as frontline therapy in newly diagnosed AML patients unfit for chemotherapy. The planned study will dose VEN-naïve, FLT3i-naïve, and HMA-naïve patients, a group expected to be highly responsive to the TUS+VEN+HZA triplet regimen. Current triplet therapies containing kinase inhibitors can be limited by toxicities often requiring dose reductions of all three agents and may not be effective in the larger FLT3-unmutated AML population. The U.S. Food and Drug Administration (FDA) has allowed TUS to be administered as part of the triplet at 40 mg daily, at an initial dose shown active as a single agent in relapsed or refractory AML patients.
ASH Abstract – On July 31, 2024, Aptose submitted an abstract for presentation at the 2025 Annual Meeting of the American Society of Hematology (ASH) (Free ASH Whitepaper) in December 2024. Lead author Navel Daver, MD, University of Texas MD Anderson Cancer Center, Houston, TX and research team explore the safety and efficacy results that support the upcoming combination study of TUS+VEN+AZA as a triplet drug combination frontline therapy in newly diagnosed AML patients ineligible for intensive chemotherapy, independent of FLT3 mutation status, which is an important differentiator for tuspetinib.
Nasdaq – On July 19, 2024, Aptose announced that it had received a deficiency letter (the "Deficiency Letter") from the Nasdaq Listing Qualifications Department of The Nasdaq Stock Market LLC ("Nasdaq") notifying the Company that, for the last thirty (30) consecutive business days, the closing bid price for the Company’s common shares had been below the minimum $1.00 per share required for continued listing on The Nasdaq Capital Market pursuant to Nasdaq Listing Rule 5550(a)(2) (the "Minimum Bid Price Requirement"). The Deficiency Letter has no immediate effect on the listing of the Company’s common shares, and its common shares will continue to trade on The Nasdaq Capital Market under the symbol "APTO" at this time. The Company’s common shares continue to trade on the Toronto Stock Exchange ("TSX") under the symbol "APS". The Company’s listing on the TSX is independent and will not be affected by the Nasdaq listing status.
In accordance with Nasdaq Listing Rule 5810(c)(3)(A), the Company has been given one hundred and eighty (180) calendar days, or until January 10, 2025, to regain compliance with the Minimum Bid Price Requirement. If at any time before January 10, 2025, the bid price of the Company’s common shares closes at $1.00 per share or more for a minimum of ten (10) consecutive business days, the Staff will provide written confirmation that the Company has achieved compliance. If the Company does not regain compliance with the Minimum Bid Price Requirement by January 10, 2025, the Company may be afforded a second one hundred and eighty (180) calendar day period to regain compliance. The Company intends to monitor the closing bid price of its common shares and may, if appropriate, consider available options to regain compliance with the Minimum Bid Price Requirement. However, there can be no assurance that the Company will be able to regain compliance with the Minimum Bid Price Requirement or will otherwise be in compliance with other Nasdaq Listing Rules.
Multiple Planned Value-creating Milestones Ahead
Frontline therapy triplet pilot dose initiation planned in newly diagnosed (ND) AML: 2H 2024
Triplet pilot dose escalation planned with early data in ND AML: ASH (Free ASH Whitepaper) 2024
Triplet pilot completed with CR/MRD data and dose selection: EHA (Free EHA Whitepaper) 2025
Triplet Ph2/Ph3 pivotal program planned initiation: 2H 2025