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Sequential Phase II clinical trials evaluating CRLX101 as monotherapy and in combination with bevacizumab in recurrent ovarian cancer
Abstract
Background Topoisomerase-1 inhibitors are an important class of cytotoxics associated with toxicity that limits their use. CRLX101 is a novel cyclodextrin-containing polymer conjugate of camptothecin (CPT) that self-assembles into nanoparticles to deliver sustained levels of active CPT into cancer cells while substantially reducing systemic exposure. Methods We conducted sequential phase II, open label, single arm clinical trials to evaluate CRLX101 as a single agent (n = 29) and with bevacizumab (Bev) (n = 34). Patients (pts) had measurable recurrent epithelial ovarian, tubal or primary peritoneal cancer, that could be platinum refractory, resistant or sensitive. Cohort A (Single agent CRLX101) allowed up to 3 prior chemotherapy regimens, but no prior topo-1 inhibitors. Pts received CRLX101 15 mg/m 2 IV every 14 days Q28 with response evaluation every 2 cycles. Cohort B also received Bev 10 mg/kg D1,15 Q28, and included only platinum resistant disease with up to 2 prior lines, and more rigorous eligibility criteria. Results CRLX101 was well tolerated other than nausea, fatigue and anemia. 29 pts. received a median of 3 (1-16) cycles with a clinical benefit rate (CBR) of 68% and overall response rate (ORR) of 11%. With the addition of Bev in Cohort B (n = 34), the CBR was increased to 95% and the ORR to 18%. PFS was 4.5 months (0.9 to 15.9 months) in Cohort A and 6.5 months (2.8 to 14.4 months) in Cohort B. Bev increased the incidence of hypertension and qualitatively increas…
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In a Phase II trial in ovarian cancer, CRLX101 demonstrated acceptable tolerability as monotherapy or with bevacizumab.
“In a Phase II trial involving patients with ovarian cancer, CRLX101 demonstrated acceptable tolerability when administered either as a single agent or in combination with bevacizumab.”
From HIF inhibition: Current strategies and clinical challenges (2026) · cites this paper as [332]
CRLX101 monotherapy achieved an overall response rate of 11%, which increased to 18% when combined with bevacizumab.
“As monotherapy, CRLX101 achieved an overall response rate of 11%, which increased to 18% when combined with bevacizumab [332].”
From HIF inhibition: Current strategies and clinical challenges (2026) · cites this paper as [332]
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Metadata
- Authors
- Krasner, C. N., Campos, S. M., Young, C. L., Chadda, K. R., Lee, H., Birrer, M. J., Horowitz, N. S., Konstantinopoulos, P. A., D'Ascanio, A. M., Matulonis, U. A., & Penson, R. T.
- Affiliations
- Dana-Farber Cancer Institute (US)
- Massachusetts General Hospital (US)
- University of Arkansas at Little Rock (US)
- Corresponding author
- Penson, Richard T.
- ORCID
- Venue
- Gynecologic Oncology
- Publisher
- Elsevier BV
- Published
- 2021-09
- Volume
- 162
- Issue
- 3
- Pages
- 661-666
- ISSN
- 0090-8258 (ISSN-L)
- OpenAlex
- W3178957657
- Cited by
- 42
- References
- 18
- Citations by year
- 2026: 12 · 2025: 12 · 2024: 4 · 2023: 7 · 2022: 4 · 2021: 3
- FWCI
- 3.88
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Gynecologic Oncology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Oncology › Ovarian cancer diagnosis and treatment
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer therapeutics and mechanisms
- Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
- Keywords
- CRLX101, camptothecin, topoisomerase I inhibitor, recurrent ovarian cancer, bevacizumab, platinum-resistant ovarian cancer, nanoparticle drug delivery, combination chemotherapy, progression-free survival, toxicity
- MeSH terms
- Bevacizumab, Carcinoma, Ovarian Epithelial, Adult, Aged, Antineoplastic Combined Chemotherapy Protocols, Camptothecin, Cyclodextrins, Female, Humans, Middle Aged, Neoplasm Recurrence, Local, Ovarian Neoplasms, Peritoneal Neoplasms
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