Lucicebtide

TARRYTOWN, N.Y., March 26, 2025 /PRNewswire/ -- Sapience Therapeutics, Inc., a clinical-stage biotechnology company focused on the discovery and development of peptide therapeutics to address oncogenic and immune dysregulation that drive cancer, today announced four poster presentations at the American Association for Cancer Research (AACR) Annual Meeting 2025, taking place April 25-30, 2025, in Chicago, Illinois. Sapience will present non-clinical results from both of its clinical programs, lucicebtide (formerly known as ST101), a first-in-class antagonist of C/EBPβ, and ST316, a first-in-class antagonist of β-catenin and its co-activator, BCL9, as well as results from its preclinical Fra1 antagonist peptide (FraAP) program, a first-in-class antagonist of the activator protein 1 (AP-1) complex. "We are thrilled to be presenting a compendium of non-clinical data supportive of our clinical and preclinical SPEARs™ programs, including lucicebtide, ST316, and our FraAP program, at the upcoming AACR Annual Meeting," said Jim Rotolo, Ph.D., Sapience's Chief Scientific Officer. "Results from our lucicebtide and ST316 studies further elucidate their respective mechanisms of action and highlight their potential for combination strategies. Additionally, preclinical data demonstrate the potential of our FraAP program to induce anti-cancer activity by targeting the AP-1 complex, particularly in head and neck squamous cell carcinoma." Poster Presentation Details and Abstract Highlights: Title: "The clinical C/EBPβ antagonist peptide lucicebtide synergizes with molecularly targeted therapies in GBM" Session Title: Targeted Therapies and Combinations 1 Location: Poster Section 34 Abstract Number: 839 Date and Time: Sunday, April 27, 2025, 2:00 pm – 5:00 pm CDT Abstract Summary: In non-clinical studies, the mechanism of lucicebtide, which has previously demonstrated antitumor activity via direct cell death and immune activation within the tumor microenvironment, enabled a synthetic lethal effect with molecularly targeted therapeutics, such as EGFR inhibitors, that are typically not effective when used as monotherapies for the treatment of glioblastoma (GBM). Transcriptional analysis utilizing GBM genetics and signatures of C/EBPβ activity were performed to identify potential target populations likely to benefit from lucicebtide combinations. Title: "FraAP, a peptide antagonist against the activator protein 1 transcription factor complex, demonstrates cancer cell cytotoxicity and reduced invasion in vitro and tumor regression in vivo in HNSCC models" Session Title: Gene Regulation and Transcription Factors 2 Location: Poster Section 10 Abstract Number: 1415 Date and Time: Monday, April 28, 2025, 9:00 am – 12:00 pm CDT Abstract Summary: FraAP selectively binds to and inhibits key oncogenic drivers of the AP-1 transcription factor complex, resulting in the suppression of AP-1 driven pathways required for cancer cell cycle progression, proliferation, and invasion and promotes apoptosis in preclinical studies. Further, in a head and neck squamous cell carcinoma (HNSCC) xenograft model, administration of FraAP results in significant tumor growth inhibition, further demonstrating the anti-cancer potential of targeting the AP-1 complex. Title: "An ex vivo organoid study to identify biomarkers of sensitivity to ST316, a clinical-stage β-catenin antagonist peptide" Session Title: Biomarkers and Molecular Targets for Prevention Location: Poster Section 43 Abstract Number: 2361 Date and Time: Monday, April 28, 2025, 9:00 am – 12:00 pm CDT Abstract Summary: Analysis of 60 patient-derived tumor organoids revealed that tumors with TP53 WT and mutations in the MAPK pathway significantly correlate with sensitivity to ST316, a β-catenin antagonist peptide. Further, in non-clinical models, combining ST316 with encorafenib, a BRAF inhibitor, showed synergistic effects in BRAFV600E-mutant colorectal cancer (CRC) organoids, demonstrating a promising combination approach in this poor prognosis and underserved patient population. Across studies, findings support rational combinations of ST316 with clinically relevant MAPK inhibitors. Title: "Reprogramming of MDSCs by ST316, a clinical peptide antagonist of β-Catenin/BCL9, enhances anti-tumor immuno- and chemotherapy" Session Title: Modifiers of Tumor Microenvironment Location: Poster Section 30 Abstract Number: 3275 Date and Time: Monday, April 28, 2025, 2:00 pm – 5:00 pm CDT Abstract Summary: Results reveal a novel role for Wnt/β-catenin signaling in myeloid-derived suppressor cell (MDSC) biology, a key mediator of immune-suppression, whereby antagonism of β-catenin with ST316 leads to suppression of MDSC expansion. In combination studies, ST316 significantly enhances the anti-tumor efficacy of anti-PD-1 immunotherapy and standard-of-care chemotherapies for advanced CRC such as FOLFIRI. While anti-PD-1 and FOLFIRI alone each resulted in expansion of immunosuppressive MDSCs, combination with ST316 prevented this expansion. These data suggest that therapeutically targeting the β-catenin/BCL9 interaction may be an effective strategy to enhance both chemotherapy and immunotherapy in Wnt-driven tumors that respond poorly to monotherapy. More information can be found on the AACR Annual Meeting 2025 website. About Lucicebtide (formerly known as ST101) Lucicebtide, a first-in-class antagonist of C/EBPβ, has completed the main portion of a Phase 2 dose expansion study in recurrent GBM (rGBM) (NCT04478279). An ongoing window-of-opportunity sub-study is evaluating lucicebtide in combination with radiation and temozolomide in patients with newly diagnosed GBM (ndGBM) and as a monotherapy in patients with rGBM, with patients receiving ST101 before and after surgical resection in both cohorts. ST101 has been granted Fast Track designation for rGBM from the U.S. Food and Drug Administration (U.S. FDA) and orphan designations for glioma from the U.S. FDA and the European Commission. About ST316 ST316 is a first-in-class antagonist of the interaction between β-catenin and its co-activator, BCL9, a complex responsible for driving oncogene expression and immune exclusion in multiple cancers where aberrant Wnt/β-catenin pathway signaling is observed. ST316 exposure in cancer cells prevents BCL9-driven nuclear localization of β-catenin and formation of the enhanceosome protein complex. Disruption of this interaction selectively suppresses the transcription of oncogenic Wnt target genes that regulate proliferation, migration, invasion and the metastatic potential of tumor cells, as well as genes that regulate the immunosuppression of the tumor microenvironment. ST316 creates a pro-immune tumor microenvironment and in preclinical models has shown to be synergistic with checkpoint inhibition. Due to its selectivity and downstream modulation of the Wnt/β-catenin pathway, ST316 presents an opportunity to safely and effectively target Wnt/β-catenin driven pathologies without the toxicities previously seen with other Wnt pathway agents. ST316-101 (NCT05848739) is a first-in-human, open-label, Phase 1-2 Dose Escalation and Expansion study designed to determine the safety, tolerability, PK, PD and early efficacy of ST316. The Phase 1 Dose Escalation portion of the study tested various dose levels of ST316 in patients with select advanced solid tumors that are known to harbor abnormalities of the Wnt/β-catenin signaling pathway, including colorectal cancer (CRC). ST316 is currently being tested in the Phase 2 portion of the study in CRC patients in combination with relevant standards of care and in multiple lines of treatment. The U.S. Food and Drug Administration (U.S. FDA) has granted Orphan Drug Designation to ST316 for the treatment of familial adenomatous polyposis (FAP). About Sapience Therapeutics Sapience Therapeutics, Inc. is a privately held, clinical-stage biotechnology company focused on discovering and developing peptide therapeutics to address oncogenic and immune dysregulation that drive cancer. With in-house discovery capabilities, Sapience has built a pipeline of therapeutic candidates called SPEARs™ (Stabilized Peptides Engineered Against Regulation) that disrupt intracellular protein-protein interactions, enabling targeting of transcription factors which have traditionally been considered undruggable. Sapience can also direct cargo to cell surface targets with their new class of molecule called SPARCs™ (Stabilized Peptides Against Receptors on Cancer), enabling delivery of radioisotope payloads such as α-particles to cancer cells. Sapience is advancing its lead programs, lucicebtide (formerly known as ST101), a first-in-class antagonist of C/EBPβ, and ST316, a first-in-class antagonist of β-catenin, through Phase 2 clinical trials. For more information on Sapience Therapeutics, please visit and engage with us on LinkedIn. Media and Investor Contact: Melissa Forst/Brendan Burns Argot Partners 212-600-1902 [email protected] SOURCE Sapience Therapeutics, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

TARRYTOWN, NY, USA I January 27, 2025 I Sapience Therapeutics, Inc., a clinical-stage biotechnology company focused on the discovery and development of peptide therapeutics to address oncogenic and immune dysregulation that drive cancer, today announced that it presented Phase 1 safety and biomarker data on ST316, a novel peptide antagonist of β-catenin, during a poster session at the 2025 American Society of Clinical Oncology (ASCO) Gastrointestinal (GI) Cancers Symposium. ST316 is a first-in-class antagonist of β-catenin and its co-activator, BCL9, that is designed to selectively shut down the Wnt/β-catenin signaling pathway. The Phase 1 Dose Escalation study enrolled patients with advanced solid tumors likely to harbor abnormalities in the Wnt/β-catenin pathway to assess the safety, pharmacokinetics (PK), biomarker and preliminary activity of ST316, and to recommend a Phase 2 dose. “With signals of anti-tumor activity, strong pharmacodynamic data, and a clean safety profile, we are pleased that the ST316 Phase 1 Dose Escalation study demonstrated clinical proof-of-concept as a single agent, in a patient population in which single agent response is limited,” commented Dr. Abi Vainstein-Haras, Sapience’s Chief Medical Officer. “ST316’s tolerability as a single agent, together with the biomarker data from its Phase 1 study, are encouraging for its continued development in our ongoing Phase 2 Dose Expansion study, which is evaluating ST316 across multiple combinations and lines of treatment in colorectal cancer (CRC).” Summary of Phase 1 Dose Escalation Results: Poster Presentation: Title: “Safety and biomarker assessment of ST316, a novel peptide antagonist of ß-catenin, in patients with advanced solid tumors” Session: Poster Session C: Cancers of the Colon, Rectum and Anus Date/Time: Saturday, January 25, 2025, 7:00 am to 7:55 am PST Abstract Number : 286 Presenting Author: Anthony El-Khoueiry, MD More information can be found on the ASCO GI website . About ST316 ST316 is a first-in-class antagonist of the interaction between β-catenin and its co-activator, BCL9, a complex responsible for driving oncogene expression and immune exclusion in multiple cancers where aberrant Wnt/β-catenin pathway signaling is observed. ST316 exposure in cancer cells prevents BCL9-driven nuclear localization of β-catenin and inhibits formation of the Wnt enhanceosome protein complex. Disruption of this interaction selectively suppresses the transcription of oncogenic Wnt target genes that regulate proliferation, migration, invasion and the metastatic potential of tumor cells, as well as genes that regulate the immunosuppression of the tumor microenvironment. ST316 creates a pro-immune tumor microenvironment and in preclinical models has shown to be synergistic with checkpoint inhibition. Due to its selectivity and downstream modulation of the Wnt/β-catenin pathway, ST316 presents an opportunity to safely and effectively target Wnt/β-catenin driven pathologies without the toxicities previously seen with other Wnt pathway agents. ST316-101 ( NCT05848739 ) is a first-in-human, open-label, Phase 1-2 Dose Escalation and Expansion study designed to determine the safety, tolerability, PK, PD and early efficacy of ST316. The Phase 1 Dose Escalation portion of the study tested various dose levels of ST316 in patients with select advanced solid tumors that are known to harbor abnormalities of the Wnt/β-catenin signaling pathway, including CRC.  ST316 is currently being tested in the Phase 2 portion of the study in CRC patients in combination with relevant standards of care and in multiple lines of treatment. The U.S. FDA has granted Orphan Drug Designation to ST316 for the treatment of familial adenomatous polyposis (FAP). About Sapience Therapeutics Sapience Therapeutics, Inc. is a privately held, clinical-stage biotechnology company focused on discovering and developing peptide therapeutics to address oncogenic and immune dysregulation that drive cancer.  With in-house discovery capabilities, Sapience has built a pipeline of therapeutic candidates called SPEARs™ (Stabilized Peptides Engineered Against Regulation) that disrupt intracellular protein-protein interactions, enabling targeting of transcription factors which have traditionally been considered undruggable. Sapience can also direct cargo to cell surface targets with their new class of molecule called SPARCs™ (Stabilized Peptides Against Receptors on Cancer), enabling delivery of payloads such as α-particles to cancer cells. Sapience is advancing its lead programs, lucicebtide (formerly known as ST101), a first-in-class antagonist of C/EBPβ, and ST316, a first-in-class antagonist of β-catenin, through Phase 2 clinical trials. For more information on Sapience Therapeutics, please visit https://sapiencetherapeutics.com/ and engage with us on LinkedIn . SOURCE: Sapience Therapeutics