unesbulin (BMIi-1)
/ PTC Therap
- LARVOL DELTA
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November 26, 2025
Bmi-1 inhibition sensitizes head and neck cancer stem cells to cytotoxic chemotherapy.
(PubMed, Transl Oncol)
- "We and others have shown that treatment with cytotoxic chemotherapy agents (e.g. Cisplatin, Carboplatin) induce Bmi-1 expression and increase the fraction of highly tumorigenic CSC in HNSCC. In vivo, Bmi-1 inhibition with PTC596 suppressed Cisplatin-mediated increase in the fraction of ALDHhighCD44high cells (cancer stemness). Collectively, these preclinical results demonstrate that Bmi-1 is a key mediator of head and neck cancer stemness and suggest that HNSCC patients might benefit from treatment with a Bmi-1 inhibitor combined with a conventional chemotherapeutic agent."
Journal • Head and Neck Cancer • Oncology • Oral Cancer • Solid Tumor • Squamous Cell Carcinoma • Squamous Cell Carcinoma of Head and Neck • IL6R
October 15, 2025
Leveraging Medulloblastoma Clonal Dynamics to Overcome Treatment Resistance.
(PubMed, Clin Cancer Res)
- "This work provides the foundation for clinical validation of small-molecule inhibitors synergistic with PTC-596 to improve the durability of remissions and extend survival of patients with treatment-refractory Group 3 MB."
Journal • Brain Cancer • Medulloblastoma • Oncology • Pediatrics • Solid Tumor • BMI1 • PLK1
October 12, 2025
Unesbulin Overcomes Cisplatin Resistance in Pleural Mesothelioma Through Induction of Aberrant Tubulin Polymerization and Inactivation of the BMI1 Oncogene
(IMIG 2025)
- "Unesbulin induces a potent anti-tumor effect by disrupting microtubule assembly and inactivating BMI1, with only modest effects on non-malignant cells. Unesbulin sensitizes PM cells towards Cisplatin/Pemetrexed, thus revealing a promising therapeutic strategy to overcome PM drug resistance."
Leiomyosarcoma • Malignant Pleural Mesothelioma • Mesothelioma • Pleural Mesothelioma • Sarcoma • Solid Tumor • BMI1 • STMN1
September 06, 2025
Unesbulin overcomes Cisplatin resistance in pleural mesothelioma via induction of apotosis, aberrant tubulin polymerization and inactivation of the BMI1 oncogene
(DGT 2025)
- "Results Unesbulin induces a potent anti-tumor effect by disrupting microtubule assembly and inactivating BMI1, with only modest effects on non-malignant cells. Unesbulin sensitizes PM cells towards Cisplatin/Pemetrexed, thus revealing a promising therapeutic strategy to overcome PM drug resistance."
Leiomyosarcoma • Malignant Pleural Mesothelioma • Mesothelioma • Pleural Mesothelioma • Sarcoma • Solid Tumor • BMI1
March 19, 2025
SUNRISELMS: A Study of Unesbulin in Participants With Advanced Leiomyosarcoma (LMS)
(clinicaltrials.gov)
- P2/3 | N=360 | Terminated | Sponsor: PTC Therapeutics | Active, not recruiting ➔ Terminated; Business decision
Trial termination • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
January 04, 2025
Phase IB Trial of the BMI-1 Inhibitor PTC596 (Unesbulin) plus Neoadjuvant Paclitaxel-Carboplatin in Advanced Ovarian Cancer
(SGO 2025)
- No abstract available
Clinical • Metastases • P1 data • Oncology • Ovarian Cancer • Solid Tumor
February 14, 2025
Progress and prospects of the combination of BMI1-targeted therapy and immunotherapy in cervical cancer.
(PubMed, Am J Cancer Res)
- "To date, there have been no reports on the combination of BMI1-targeted therapy and immunotherapy in cervical cancer. This review, therefore, elucidates the current state of research and explores the potential and perspectives of combining targeted therapy with immunotherapy for cervical cancer."
Journal • Review • Cervical Cancer • Gynecologic Cancers • Oncology • Solid Tumor • Women's Health • BMI1
November 09, 2024
A PHASE 2/3 STUDY EVALUATING THE EFFICACY AND SAFETY OF UNESBULIN IN ADVANCED LEIOMYOSARCOMA (SUNRISELMS)
(CTOS 2024)
- No abstract available
Clinical • Late-breaking abstract • Metastases • P2/3 data • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
November 07, 2024
Molecular and biology correlative results from the phase 1b trial of unesbulin (PTC596) with radiotherapy in children newly-diagnosed with diffuse intrinsic pontine glioma (DIPG) and high-grade glioma (HGG): A report from the COllaborative Network for NEuro-Oncology Clinical Trials (CONNECT)
(SNO 2024)
- "Comprehensive molecular profiling of diagnostic and post-mortem tumor tissue provides valuable early biological insight, elucidating potential genomic biomarkers predictive of outcome and response to M-phase alteration and BMI-1 modulation in DIPG/HGG."
Clinical • P1 data • Brain Cancer • CNS Tumor • Diffuse Intrinsic Pontine Glioma • Genetic Disorders • Glioma • Malignant Glioma • Oncology • Solid Tumor • ACVR1 • ATRX • BCOR • BMI1 • EGFR • H3-3A • H3C1 • MET • MSH6 • MYCN • NF1 • PDGFRA • PIK3CA • PPM1D • TP53
June 21, 2024
A Phase 1b Study of PTC596 in Children With Newly Diagnosed Diffuse Intrinsic Pontine Glioma and High Grade Glioma
(clinicaltrials.gov)
- P1 | N=64 | Active, not recruiting | Sponsor: Nationwide Children's Hospital | Trial primary completion date: Aug 2024 ➔ Mar 2024
Trial primary completion date • Brain Cancer • CNS Tumor • Diffuse Intrinsic Pontine Glioma • Glioma • Oncology • Solid Tumor • BMI1
May 13, 2024
A Phase 1b Study of PTC596 in Children With Newly Diagnosed Diffuse Intrinsic Pontine Glioma and High Grade Glioma
(clinicaltrials.gov)
- P1 | N=64 | Active, not recruiting | Sponsor: Nationwide Children's Hospital | Trial primary completion date: Mar 2024 ➔ Aug 2024
Trial primary completion date • Brain Cancer • CNS Tumor • Diffuse Intrinsic Pontine Glioma • Glioma • Oncology • Solid Tumor • BMI1
April 29, 2024
Phase Ib Study of Unesbulin (PTC596) Plus Dacarbazine for the Treatment of Locally Recurrent, Unresectable or Metastatic, Relapsed or Refractory Leiomyosarcoma.
(PubMed, J Clin Oncol)
- "Unesbulin 300 mg twice per week plus DTIC 1,000 mg/m2 once every 21 days was identified as the RP2D, demonstrating a favorable benefit-risk profile in a heavily pretreated population of adults with advanced LMS."
Journal • Metastases • P1 data • Hematological Disorders • Leiomyosarcoma • Neutropenia • Oncology • Sarcoma • Solid Tumor • Thrombocytopenia
April 29, 2024
Phase Ib Study of Unesbulin (PTC596) Plus Dacarbazine for the Treatment of Locally Recurrent, Unresectable or Metastatic, Relapsed or Refractory Leiomyosarcoma
(J Clin Oncol)
- P1b N=41 | NCT03761095 | Sponsor: PTC Therapeutics | "On the basis of data from 27 subjects who were deemed DLT-evaluable, toxicity was higher in the unesbulin 400 mg group, with three of four subjects (75%) experiencing DLTs versus one of four subjects (25%) in the 200 mg group and three of 19 subjects (15.8%) in the 300 mg group. The most commonly reported DLTs and treatment-related grade 3 and 4 adverse events were thrombocytopenia and neutropenia. At the RP2D, seven subjects who were efficacy evaluable achieved partial response for an objective response rate of 24.1%."
P1 data • Leiomyosarcoma
April 15, 2024
OU-SCC-PTC-001: Unesbulin in Women With Ovarian Cancer Receiving Neoadjuvant Chemotherapy
(clinicaltrials.gov)
- P1 | N=27 | Completed | Sponsor: University of Oklahoma | Active, not recruiting ➔ Completed | Trial completion date: Dec 2024 ➔ Mar 2024
Trial completion • Trial completion date • Oncology • Ovarian Cancer • Ovarian Serous Adenocarcinoma • Solid Tumor
March 06, 2024
Determining the nuclear and cytoplasmic function of BMI-1 in diffuse intrinsic pontine glioma during M phase
(AACR 2024)
- "We have previously shown that PTC596, a potent BMI-1 modulator, induces chromosome scattering, M phase cell-cycle arrest, BMI-1 phosphorylation and translocation to the cytoplasm leading to the inhibition of its PRC1 canonical function and cell death...We are currently investigating potential pathways involved in BMI-1 nuclear-cytosol translocation through bioinformatic analyses, protein-protein interaction simulations, and pharmacological inhibitor assays. Collectively, these studies aim to elucidate the molecular mechanisms underlying BMI-1 functions in DIPG, thereby potentially paving the way for the development of targeted therapeutic strategies related to M phase progression."
Brain Cancer • CNS Tumor • Diffuse Intrinsic Pontine Glioma • Glioma • Oncology • Solid Tumor • BMI1
March 28, 2024
Tumor Microenvironment Landscapes Supporting EGFR-mutant NSCLC Are Modulated at the Single-cell Interaction Level by Unesbulin Treatment.
(PubMed, Cancer Res Commun)
- "Here we revealed how EGFR-mutant landscapes are affected at the single-cell resolution level during Unesbulin treatment. This novel drug, by targeting cancer cells and their interactions with crucial TME components, could be envisioned for future therapeutic advancements."
Biomarker • Journal • Tumor microenvironment • Hematological Malignancies • Leukemia • Lung Adenocarcinoma • Lung Cancer • Non Small Cell Lung Cancer • Oncology • Solid Tumor • BMI1 • EGFR
March 15, 2024
A Study of Unesbulin (PTC596) in Combination With Dacarbazine in Participants With Advanced Leiomyosarcoma (LMS)
(clinicaltrials.gov)
- P1 | N=41 | Completed | Sponsor: PTC Therapeutics | Active, not recruiting ➔ Completed
Combination therapy • Metastases • Trial completion • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
January 26, 2024
PTC596-Induced BMI-1 Inhibition Fights Neuroblastoma Multidrug Resistance by Inducing Ferroptosis.
(PubMed, Antioxidants (Basel))
- "Of particular interest is the observation that PTC596, alone or in combination with PRIMA-1 and etoposide, significantly reduced GSH levels, increased peroxide production, stimulated lipid peroxidation, and induced ferroptosis. Therefore, these findings suggest that PTC596, by inhibiting BMI-1 and triggering ferroptosis, could be a promising approach to fight chemoresistance."
Journal • CNS Tumor • Neuroblastoma • Oncology • Pediatrics • Solid Tumor • BMI1 • TP53
January 25, 2024
A Phase 1b Study of PTC596 in Children With Newly Diagnosed Diffuse Intrinsic Pontine Glioma and High Grade Glioma
(clinicaltrials.gov)
- P1 | N=64 | Active, not recruiting | Sponsor: Nationwide Children's Hospital | Recruiting ➔ Active, not recruiting | Phase classification: P1b ➔ P1
Enrollment closed • Phase classification • Brain Cancer • CNS Tumor • Diffuse Intrinsic Pontine Glioma • Glioma • Oncology • Solid Tumor • BMI1
December 22, 2023
Pharmacokinetics of Dacarbazine and Unesbulin and CYP1A2-Mediated Drug Interactions in Patients With Leiomyosarcoma.
(PubMed, Clin Transl Sci)
- "No meaningful difference in unesbulin PK was observed between C2 and C1. The combination therapy of 1000 mg/m IV DTIC q21d and 300 mg unesbulin BIW in a staggered regimen is well tolerated in patients with LMS."
Journal • PK/PD data • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor • CYP1A2
December 22, 2023
Unesbulin in Women With Ovarian Cancer Receiving Neoadjuvant Chemotherapy
(clinicaltrials.gov)
- P1 | N=27 | Active, not recruiting | Sponsor: University of Oklahoma | Trial completion date: Feb 2024 ➔ Dec 2024 | Trial primary completion date: Jan 2024 ➔ Jun 2024
Trial completion date • Trial primary completion date • Oncology • Ovarian Cancer • Ovarian Serous Adenocarcinoma • Solid Tumor
December 13, 2023
A Study of Unesbulin (PTC596) in Combination With Dacarbazine in Participants With Advanced Leiomyosarcoma (LMS)
(clinicaltrials.gov)
- P1 | N=41 | Active, not recruiting | Sponsor: PTC Therapeutics | Phase classification: P1b ➔ P1
Phase classification • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
December 13, 2023
SUNRISELMS: A Study of Unesbulin in Participants With Advanced Leiomyosarcoma (LMS)
(clinicaltrials.gov)
- P2/3 | N=345 | Active, not recruiting | Sponsor: PTC Therapeutics | Recruiting ➔ Active, not recruiting
Enrollment closed • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
November 13, 2023
Unesbulin in Women With Ovarian Cancer Receiving Neoadjuvant Chemotherapy
(clinicaltrials.gov)
- P1 | N=27 | Active, not recruiting | Sponsor: University of Oklahoma | Phase classification: P1b ➔ P1
Phase classification • Oncology • Ovarian Cancer • Ovarian Serous Adenocarcinoma • Solid Tumor
August 16, 2023
UPDATED RESULTS FROM AN ONGOING PHASE 1B STUDY OF UNESBULIN (PTC596) PLUS DACARBAZINE FOR THE TREATMENT OF PATIENTS WITH ADVANCED LEIOMYOSARCOMA
(CTOS 2023)
- P1b, P2/3 | "Unesbulin 300 mg BIW in combination with DTIC 1,000 mg/m2 every 21 days was well tolerated and demonstrated promising efficacy in a heavily pre-treated patient population with advanced LMS; these results support further investigation. A randomized, placebo-controlled, Phase 2/3 trial is ongoing (NCT05269355)."
Clinical • Metastases • P1 data • Leiomyosarcoma • Oncology • Sarcoma • Solid Tumor
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