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DRUG CLASS:

DNA PK inhibitor

4d
Testing the Combination of New Anti-cancer Drug Peposertib With Avelumab and Radiation Therapy for Advanced/Metastatic Solid Tumors and Hepatobiliary Malignancies (clinicaltrials.gov)
P1/2, N=103, Suspended, National Cancer Institute (NCI) | Trial completion date: Dec 2025 --> Jul 2027 | Trial primary completion date: Dec 2025 --> Jul 2027
Trial completion date • Trial primary completion date • Tumor mutational burden
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Bavencio (avelumab) • peposertib (M3814)
13d
Enrollment closed
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RARA (Retinoic Acid Receptor Alpha) • PML (Promyelocytic Leukemia) • CD4 (CD4 Molecule)
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cytarabine • etoposide IV • mitoxantrone • peposertib (M3814) • Starasid (cytarabine ocfosfate)
18d
Concurrent XRD-0394 With Radiation Therapy for High Grade Gliomas (clinicaltrials.gov)
P1, N=39, Recruiting, NYU Langone Health | Not yet recruiting --> Recruiting | Initiation date: Apr 2025 --> Nov 2025
Enrollment open • Trial initiation date
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temozolomide • XRD-0394
1m
NRG-HN008: Testing the Addition of M3814 (Peposertib) to Radiation Therapy for Patients With Advanced Head and Neck Cancer Who Cannot Take Cisplatin (clinicaltrials.gov)
P1, N=21, Active, not recruiting, National Cancer Institute (NCI) | N=42 --> 21 | Trial completion date: Dec 2025 --> Dec 2026
Enrollment change • Trial completion date
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CD4 (CD4 Molecule)
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peposertib (M3814)
1m
Testing the Addition of An Anti-cancer Drug, M3814 (Peposertib), to the Usual Radiation-Based Treatment (Lutetium Lu 177 Dotatate) for Pancreatic Neuroendocrine Tumors (clinicaltrials.gov)
P1, N=29, Active, not recruiting, National Cancer Institute (NCI) | Trial completion date: Oct 2025 --> Jun 2026 | Trial primary completion date: Oct 2025 --> Jun 2026
Trial completion date • Trial primary completion date
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peposertib (M3814) • Lutathera (lutetium Lu 177 dotatate)
1m
Dual PI3Kδ/γ inhibition enhances radiotherapy-induced antitumor immunity via macrophage-dependent cGAS-STING-type I interferon signaling. (PubMed, Biochem Biophys Res Commun)
In the syngeneic CT26 model, dual PI3Kδ/γ inhibition (BR101801 or duvelisib), unlike selective PI3Kδ inhibition (idelalisib), synergized with RT (7.5 Gy) to suppress tumor growth and induce durable immune memory. Furthermore, blockade of the IFN-I receptor abolished CD8+ T cell infiltration and M2-like macrophage suppression, abrogating antitumor efficacy and confirming the requirement for IFN-I signaling. These findings identify macrophage-driven activation of the cGAS-STING-IFN-I axis as a key mechanism by which dual PI3Kδ/γ inhibition potentiates RT, providing a strong scientific rationale for its development as an immunomodulatory radiosensitizer.
Journal
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CD8 (cluster of differentiation 8) • CXCL10 (Chemokine (C-X-C motif) ligand 10) • PIK3CG (Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit Gamma) • PIK3CD (Phosphatidylinositol-4 5-Bisphosphate 3-Kinase Catalytic Subunit Delta) • STING (stimulator of interferon response cGAMP interactor 1) • CGAS (Cyclic GMP-AMP Synthase)
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Zydelig (idelalisib) • Copiktra (duvelisib) • bosmolisib (BR101801)
2ms
Trial suspension • Tumor mutational burden
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Bavencio (avelumab) • peposertib (M3814)
2ms
Enrollment open
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Xtandi (enzalutamide) • abiraterone acetate • Pluvicto (lutetium Lu 177 vipivotide tetraxetan)
2ms
Atractylenolide I activates the DNA damage-apoptosis axis in colorectal cancer patient-derived organoids by dual-targeting XRCC5 and CLTC. (PubMed, Phytomedicine)
This study identifies ATT-1 as a promising multi-targeted therapeutic for colorectal cancer by leveraging PDOs for direct, de novo target discovery. We uniquely identified two novel, high-affinity targets, CLTC and XRCC5, and elucidated a convergent dual-targeting mechanism wherein ATT-1 binding disrupts DNA damage repair and triggers apoptosis. This novel mechanism and its potent synergy with standard chemotherapy in physiologically relevant models provide a compelling strategy for integrating traditional Chinese medicine into modern precision oncology.
Journal
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CLTC (Clathrin Heavy Chain)
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oxaliplatin • NU7441
2ms
LMNA-PRKDC axis enhances DNA repair and promotes chemoresistance in glioblastoma. (PubMed, Cell Death Dis)
Glioblastoma (GBM) remains one of the deadliest primary brain tumors, with rapid recurrence and near-universal resistance to temozolomide (TMZ) limiting long-term survival...Inhibition of PRKDC with the ATP-competitive inhibitor KU57788 reversed resistance, restoring TMZ sensitivity and impairing tumor growth in vivo...These results establish the LMNA-PRKDC axis as a functional driver of TMZ resistance through enhanced DNA repair capacity in stem-like tumor subpopulations. Our findings support pharmacologic inhibition of PRKDC as a rational strategy to resensitize resistant GBM to standard chemotherapy and offer a foundation for future biomarker-driven clinical trials targeting DNA repair vulnerabilities in recurrent disease.
Journal
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LMNA (Lamin A/C) • PRKDC (Protein Kinase, DNA-Activated, Catalytic Subunit)
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temozolomide • NU7441
2ms
Combined DNA-PK and PARP Inhibition as a Therapeutic Strategy in BRCA-Mutated Prostate Cancer: An in Vitro Pilot Study. (PubMed, Technol Cancer Res Treat)
Scramble LNCaP, BRCA1 KO, and BRCA2 KO cells were treated with the PARPi talazoparib, the DNA-PK inhibitor nedisertib and their combination. Therapeutically targeting NHEJ presents a promising approach in treating BRCA-mutated PCa. Further in vivo investigations are required to assess the tolerability of this drug combination.
Preclinical • Journal • BRCA Biomarker • PARP Biomarker
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BRCA1 (Breast cancer 1, early onset) • BRCA2 (Breast cancer 2, early onset) • BRCA (Breast cancer early onset) • ANXA5 (Annexin A5)
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BRCA mutation
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Talzenna (talazoparib) • peposertib (M3814)
2ms
New P1/2 trial
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Xtandi (enzalutamide) • abiraterone acetate • Pluvicto (lutetium Lu 177 vipivotide tetraxetan)