Clinical Trials

Multiple early- to mid-stage clinical trials—including Phase 1, combined Phase 1/2, and Phase 2 studies—are evaluating Berzosertib (VE-822), frequently in combination with standard chemotherapeutic agents. Sponsored by government agencies, pharmaceutical companies, and academic research institutes, these studies target advanced solid tumors alongside specific malignancies such as small-cell lung cancer, non-small cell lung carcinoma, metastatic urothelial carcinoma, castration-resistant prostate cancer, and adult leiomyosarcoma. Recruitment across these investigations is primarily completed or active but not recruiting.

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT04052555 ACTIVE_NOT_RECRUITING
Bilateral Breast Carcinoma; HER2-Negative Breast Carcinoma; Localized Breast Carcinoma; Recurrent Breast Carcinoma; Triple-Negative Breast Carcinoma
National Cancer Institute (NCI)
2020-09-24 PHASE1
NCT04826341 COMPLETED
HRD Cancer; SCLC; Advanced Solid Tumors
National Cancer Institute (NCI)
2021-09-20 PHASE1; PHASE2
NCT04802174 ACTIVE_NOT_RECRUITING
SCLC; Small Cell Cancer; Advanced Solid Tumor; High Grade Neuroendocrine Cancers
National Cancer Institute (NCI)
2021-06-01 PHASE1; PHASE2
NCT04266912 ACTIVE_NOT_RECRUITING
Metastatic Malignant Solid Neoplasm; Refractory Malignant Solid Neoplasm; Unresectable Malignant Solid Neoplasm
M.D. Anderson Cancer Center
2020-03-17 PHASE1; PHASE2
NCT02627443 ACTIVE_NOT_RECRUITING
Metastatic Fallopian Tube Carcinoma; Metastatic Ovarian Carcinoma; Metastatic Primary Peritoneal Carcinoma; Ovarian Endometrioid Tumor; Ovarian High Grade Serous Adenocarcinoma; Platinum-Sensitive Ovarian Carcinoma; Recurrent Fallopian Tube Carcinoma; Recurrent Ovarian Carcinoma; Recurrent Primary Peritoneal Carcinoma; Stage IV Fallopian Tube Cancer AJCC v6 and v7; Stage IV Ovarian Cancer AJCC v6 and v7; Stage IV Primary Peritoneal Cancer AJCC v7
National Cancer Institute (NCI)
2017-05-16 PHASE1
NCT04807816 COMPLETED
Leiomyosarcoma, Adult
Institut Bergonié
2022-02-09 PHASE2
NCT03641313 ACTIVE_NOT_RECRUITING
Clinical Stage III Gastric Cancer AJCC v8; Clinical Stage III Gastroesophageal Junction Adenocarcinoma AJCC v8; Clinical Stage IV Gastric Cancer AJCC v8; Clinical Stage IV Gastroesophageal Junction Adenocarcinoma AJCC v8; Metastatic Gastric Adenocarcinoma; Metastatic Gastroesophageal Junction Adenocarcinoma; Unresectable Gastric Adenocarcinoma; Unresectable Gastroesophageal Junction Adenocarcinoma
National Cancer Institute (NCI)
2020-11-16 PHASE2
NCT04216316 ACTIVE_NOT_RECRUITING
Lung Non-Small Cell Squamous Carcinoma; Stage IV Lung Cancer AJCC v8
National Cancer Institute (NCI)
2021-04-14 PHASE1; PHASE2
NCT03309150 COMPLETED
Advanced Stage Solid Tumors
Merck KGaA, Darmstadt, Germany
2018-01-10 PHASE1
NCT02567422 ACTIVE_NOT_RECRUITING
Head and Neck Carcinoma of Unknown Primary; Head and Neck Squamous Cell Carcinoma; Stage III Hypopharyngeal Squamous Cell Carcinoma AJCC v7; Stage III Laryngeal Squamous Cell Carcinoma AJCC v6 and v7; Stage III Oral Cavity Squamous Cell Carcinoma AJCC v6 and v7; Stage III Oropharyngeal Squamous Cell Carcinoma AJCC v7; Stage III Sinonasal Squamous Cell Carcinoma AJCC v6 and v7; Stage IV Hypopharyngeal Squamous Cell Carcinoma AJCC v7; Stage IV Laryngeal Squamous Cell Carcinoma AJCC v7; Stage IV Oral Cavity Squamous Cell Carcinoma AJCC v6 and v7; Stage IV Oropharyngeal Squamous Cell Carcinoma AJCC v7; Stage IV Sinonasal Squamous Cell Carcinoma AJCC v7
National Cancer Institute (NCI)
2017-04-17 PHASE1
NCT04768296 COMPLETED
Small-cell Lung Cancer
EMD Serono Research & Development Institute, Inc.
2021-03-29 PHASE2
NCT05246111 COMPLETED
Advanced Solid Tumor
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
2022-02-15 PHASE1
NCT02567409 COMPLETED
Metastatic Bladder Urothelial Carcinoma; Metastatic Renal Pelvis and Ureter Urothelial Carcinoma; Metastatic Ureter Urothelial Carcinoma; Stage IV Bladder Urothelial Carcinoma AJCC v7
National Cancer Institute (NCI)
2017-01-31 PHASE2
NCT02595931 ACTIVE_NOT_RECRUITING
Metastatic Colorectal Carcinoma; Metastatic Lung Small Cell Carcinoma; Metastatic Malignant Solid Neoplasm; Metastatic Pancreatic Carcinoma; Refractory Colorectal Carcinoma; Refractory Lung Small Cell Carcinoma; Refractory Malignant Solid Neoplasm; Refractory Pancreatic Carcinoma; Stage III Colorectal Cancer AJCC v8; Stage III Lung Cancer AJCC v8; Stage III Pancreatic Cancer AJCC v8; Stage IV Colorectal Cancer AJCC v8; Stage IV Lung Cancer AJCC v8; Stage IV Pancreatic Cancer AJCC v8; Unresectable Colorectal Carcinoma; Unresectable Lung Small Cell Carcinoma; Unresectable Malignant Solid Neoplasm; Unresectable Pancreatic Carcinoma
National Cancer Institute (NCI)
2016-07-22 PHASE1
NCT03896503 ACTIVE_NOT_RECRUITING
Extensive Stage Lung Small Cell Carcinoma; Extrapulmonary Small Cell Neuroendocrine Carcinoma; Limited Stage Lung Small Cell Carcinoma; Platinum-Resistant Lung Small Cell Carcinoma; Platinum-Sensitive Lung Small Cell Carcinoma; Recurrent Lung Small Cell Carcinoma
National Cancer Institute (NCI)
2019-12-30 PHASE2
NCT02589522 ACTIVE_NOT_RECRUITING
Metastatic Lung Neuroendocrine Neoplasm; Metastatic Lung Non-Small Cell Carcinoma; Metastatic Lung Small Cell Carcinoma; Metastatic Malignant Neoplasm in the Brain; Stage IV Lung Cancer AJCC v8; Stage IVA Lung Cancer AJCC v8; Stage IVB Lung Cancer AJCC v8
National Cancer Institute (NCI)
2017-05-22 PHASE1
NCT03517969 ACTIVE_NOT_RECRUITING
Castration-Resistant Prostate Carcinoma; Metastatic Prostate Carcinoma; Stage IV Prostate Cancer AJCC v8
National Cancer Institute (NCI)
2019-05-29 PHASE2
NCT02595892 ACTIVE_NOT_RECRUITING
Ovarian Serous Tumor; Recurrent Fallopian Tube Carcinoma; Recurrent Ovarian Carcinoma; Recurrent Primary Peritoneal Carcinoma
National Cancer Institute (NCI)
2016-08-25 PHASE2
NCT02723864 Completed
Neoplasms
National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC)
2017-08-09 Phase 1
NCT02487095 Active not recruiting
Carcinoma Non-Small -Cell Lung|Ovarian Neoplasms|Small Cell Lung Carcinoma|Uterine Cervical Neoplasms|Carcinoma Neuroendocrine|Extrapulmonary Small Cell Cancer
National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC)
2015-07-30 Phase 1|Phase 2

(data from https://clinicaltrials.gov, updated on 2026-07-31)

Check the Berzosertib (VE-822) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Compliance for Clinical Use

Mechanism and Biochemical Profile

Berzosertib functions as a potent inhibitor of Ataxia Telangiectasia and Rad3-related (ATR) kinase, suppressing downstream signaling involved in the cellular response to DNA replication stress and double-strand break repair. By compromising DNA damage checkpoints and inducing apoptotic cell death, this mechanism sensitizes tumor cells to genotoxic stress, providing the therapeutic rationale for ongoing clinical evaluations in advanced solid tumors, small-cell lung cancer, and urothelial carcinoma.

Appendix RUO and cGMP Quality Standards

Quality Dimension RUO (Research Use Only) cGMP (Current Good Manufacturing Practice)
Clinical Applicability Prohibited in human clinical trials or medical diagnostics. Mandatory for human clinical trials (Phase I–III) and therapies.
Regulatory Status Non-regulated grade; exempt from drug manufacturing laws. Legally enforced by health authorities (e.g., FDA, EMA, NMPA).
Facility Environment Unclassified analytical or research laboratories. Validated Cleanrooms (ISO Class 5–8) with continuous monitoring.
Quality Control Basic purity and activity testing. Rigorous safety release testing (Sterility, Endotoxin, Mycoplasma).
Process Validation Basic equipment calibration; no process validation required. Full qualification (IQ/OQ/PQ) and complete batch records.
Quality Assurance Vendor self-declared without required formal QMS. Mandatory QA/QC unit, Change Control, CAPA, and vendor audits.
Regulatory Impact High risk of IND rejection if used as a critical raw material. Required for IND/NDA filings, supported by Drug Master Files (DMF).

Footnotes

Regulatory Note: Governed by FDA (21 CFR Parts 210/211/312), EMA (EudraLex Vol 4), ICH Guidelines (E6/Q7/Q9/Q10), and compendial standards (USP <71>/<85>/<1043>).

Note: Technical data last updated: Sep 1, 2026.