BOSTON and LONDON, Oct. 09, 2025 (GLOBE NEWSWIRE) -- Akari Therapeutics, Plc (Nasdaq: AKTX), an oncology biotechnology company developing novel payload antibody drug conjugates (ADCs), today announced that it has filed two new provisional patent applications with the United States Patent and Trademark Office (USPTO). The first application includes claims protecting Akari’s novel immuno-oncology payload, PH1 (a novel Thailanstatin analog), and its spliceosome modulatory mechanism of action, which is expected ...

Core Insights - Akari Therapeutics has announced promising preclinical data for its novel antibody drug conjugate (ADC) payload, PH1, which targets the AR-V7 receptor linked to hormone refractory prostate cancer progression [1][2][3] Group 1: Product Development - PH1 has shown the ability to suppress AR-V7 receptor expression in a hormone-refractory metastatic castration resistant prostate cancer (mCRPC) model, indicating its potential effectiveness where current therapies fail [3] - In hormone-sensitive LnCAP cells, PH1 demonstrated single-agent benefits and additive effects when combined with existing therapies like Xtandi and Erleada, suggesting potential for first-line combination regimens [4] - The company aims to develop PH1 ADCs as either first-line therapies with ARPIs or second-line therapies for patients who have failed ARPI treatments [5] Group 2: Market Context - There is a significant unmet need for effective therapies in ARPI-resistant hormone refractory prostate cancer, as current options are limited primarily to traditional chemotherapy [2] - Current first-line therapies, including enzalutamide (Xtandi), apalutamide (Erleada), and darolutamide (Nubeqa), have substantial annual sales, indicating a lucrative market for effective alternatives [2] Group 3: Company Overview - Akari Therapeutics specializes in developing next-generation spliceosome payload ADCs, with its lead candidate, AKTX-101, targeting the Trop2 receptor and utilizing a novel PH1 payload [6] - The company’s innovative ADC discovery platform allows for the generation and optimization of ADC candidates tailored to specific targets, enhancing its competitive edge in oncology [6][7]

Core Insights - Akari Therapeutics has announced promising preclinical data for its novel antibody drug conjugate (ADC) payload, PH1, which targets the AR-V7 receptor linked to hormone refractory prostate cancer progression [1][2][3] Group 1: Product Development - The ADC payload PH1 has shown the ability to suppress AR-V7 receptor expression in a hormone-refractory metastatic castration resistant prostate cancer (mCRPC) model, indicating its potential effectiveness where current therapies fail [3][4] - In a hormone-sensitive model, PH1 demonstrated single-agent benefits and additive effects when combined with existing therapies like Xtandi and Erleada, suggesting potential for first-line combination regimens [4][5] - Akari aims to develop the first ADC therapeutic for prostate cancer, targeting both first-line and second-line treatment scenarios for AR-V7 driven tumors [5] Group 2: Market Context - There is a significant unmet need for effective therapies in ARPI-resistant hormone refractory prostate cancer, as current options are limited primarily to traditional chemotherapy [2][4] - Current first-line therapies, including enzalutamide, apalutamide, and darolutamide, have substantial annual sales, indicating a lucrative market for effective alternatives [2] Group 3: Company Overview - Akari Therapeutics specializes in developing next-generation spliceosome payload ADCs, with a focus on innovative therapeutic mechanisms that differ from traditional ADCs [6][7] - The lead candidate, AKTX-101, targets the Trop2 receptor and utilizes a proprietary linker to deliver the PH1 payload directly into tumors, aiming for enhanced efficacy and survival outcomes [6][7]