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Rationale: Homologous recombination deficiency (HRD), defined as BRCA1/2 mutation (BRCAmut) or high genomic instability, is used to identify ovarian cancer (OC) patients most likely to benefit from PARP inhibitors. While these tests are useful, they are imperfect. Another approach is to measure the capacity of tumor cells to form RAD51 foci in the presence of DNA damage using an immunofluorescence assay (IF). We aimed to describe for the first time this assay in OC and correlate it to platinum response and BRCAmut., Methods: Tumor samples were prospectively collected from the randomized CHIVA trial of neoadjuvant platinum +/- nintedanib. IF for RAD51, GMN and gH2AX was performed on FFPE blocks. Tumors were considered RAD51-low if ≤10% of GMN-positive tumor cells had ≥5 RAD51 foci. BRCAmut were identified by NGS., Results: 155 samples were available. RAD51 assay was contributive for 92% of samples and NGS available for 77%. gH2AX foci confirmed the presence of significant basal DNA damage. 54% of samples were considered HRD by RAD51 and presented higher overall response rates to neoadjuvant platinum (P = 0.04) and longer progression-free survival (P = 0.02). In addition, 67% of BRCAmut were HRD by RAD51. Among BRCAmut, RAD51-high tumors seem to harbor poorer response to chemotherapy (P = 0.02)., Conclusions: We evaluated a functional assay of HR competency. OC demonstrate high levels of DNA damage, yet 54% fail to form RAD51 foci. These RAD51-low OC tend to be more sensitive to neoadjuvant platinum. The RAD51 assay also identified a subset of RAD51-high BRCAmut tumors with unexpected poor platinum response., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Inc. All rights reserved.)

Aim: The oral anti-angiogenic therapy nintedanib prolongs progression-free survival (PFS) when combined with chemotherapy after primary surgery for advanced epithelial ovarian cancer. The randomized phase II CHIVA trial evaluated the impact of combining nintedanib with neoadjuvant chemotherapy (NACT) for epithelial ovarian cancer., Methods: Patients with newly diagnosed unresectable FIGO stage IIIC-IV epithelial ovarian cancer received 3-4 cycles of carboplatin plus paclitaxel every 3 weeks as NACT before interval debulking surgery (IDS), followed by 2-3 post-operative cycles. Patients were randomized 2:1 to receive either nintedanib 200 mg twice daily or placebo on days 2-21 every 3 weeks during NACT (omitting peri-operative cycles), and then as maintenance therapy for up to 2 years. The primary endpoint was PFS., Results: Between January 2013 and May 2015, 188 patients were randomized (124 to nintedanib, 64 to placebo). PFS was significantly inferior with nintedanib (median 14.4 versus 16.8 months with placebo; hazard ratio 1.50, p = 0.02). Overall survival (OS) was also inferior (median 37.7 versus 44.1 months, respectively; hazard ratio 1.54, p = 0.054). Nintedanib was associated with increased toxicity (grade 3/4 adverse events: 92% versus 69%, predominantly hematologic and gastrointestinal), lower response rate by RECIST (35% versus 56% before IDS), and lower IDS feasibility (58% versus 77%) versus placebo., Conclusions: Adding nintedanib to chemotherapy and in maintenance as part of NACT for advanced epithelial ovarian cancer cannot be recommended as it increases toxicity and compromises chemotherapy efficacy (IDS, PFS, OS)., Clinicaltrials: govregistration: NCT01583322., Competing Interests: Declaration of Competing Interest Gwénaël Ferron: Advisory boards (Clovis, AstraZeneca, GSK, MSD, Roche, RanD Biotech, Olympus), lectures/symposia (AstraZeneca, Clovis, GSK, MSD, PharmaMar). Nicolas Delanoy: Advisory boards/honoraria (GSK, AstraZeneca, MSD, Clovis Oncology). Florence Joly: Advisory boards (Clovis, AstraZeneca, GSK, MSD, Seagen), lectures/symposia (AstraZeneca, Clovis, GSK, MSD); non-gynecology: Ipsen, Janssen, Sanofi, Bayer, Astellas, Pfizer, Amgen. Alain Lortholary: Advisory board fees (AstraZeneca, MSD Tesaro), speaker honoraria (Clovis Oncology, Roche), congress participation (Novartis, Pfizer, MSD, Lilly, Roche), member of CS3 sein UNICANCER. Benoît You: Consulting (MSD, AstraZeneca, GSK–Tesaro, Bayer, Roche/Genentech, ECS Progastrin, Novartis, LEK, Amgen, Clovis Oncology, Merck Serono, BMS, Seagen, Myriad). Nadine Dohollou: Consulting/expert (Daiichi, Lilly, Roche, Seagen), conferences/training (Daiichi, Lilly, Roche, Seagen), research grants/clinical trials (AstraZeneca, BMS, Boehringer Ingelheim, Genomic Health, Lilly, MSD, Novartis, Pfizer, Roche). Anne Floquet: Advisory boards (MSD, AstraZeneca, GSK, Clovis Oncology), congress participation (AstraZeneca, GSK, MSD, PharmaMar, Roche). Michel Fabbro: AstraZeneca, GSK, Clovis. Jérôme Alexandre: AstraZeneca, GSK, Clovis, MSD, Eisai, Novartis. Isabelle Ray-Coquard: Advisory/consultancy (Amgen, AstraZeneca, Clovis Oncology, Genmab, GSK, ImmunoGen, Mersana, Deciphera, Novocure, Eisai, Sutro Pharma, Merck Sharp & Dohme, Pfizer/Merck Serono, PharmaMar, Roche), research grant/funding (Roche, BMS, MSD, GSK), travel/accommodation/expenses (AstraZeneca, Roche, GSK, Clovis)., (Copyright © 2023. Published by Elsevier Inc.)

Objective: MicroRNAs (miRNAs) are promising biomarkers in ovarian cancer. Their kinetics during treatment might be useful for monitoring disease burden, and guiding treatments in patients treated with peri-operative chemotherapy and interval debulking surgery (IDS)., Methods: Serial blood samples of patients enrolled in the randomized phase II CHIVA trial, comparing first line carboplatin-paclitaxel +/- nintedanib (NCT01583322) and IDS, were investigated to assess the kinetics of 11 relevant miRNAs. Their prognostic/predictive values regarding the likelihood of complete IDS, and the patient survival, were assessed and compared to those of CA125 kinetics. The selection of the miRNAs (miR-15b-5p, miR-16-5p, miR-20a-5p, miR-21-5p, miR-93-5p, miR-122-5p, miR-150-5p, miR-195-5p, miR-200b-3p, miR-148b-5p and miR-34a-5p) was based on the expression levels found with a large explorative panel, and on the literature data., Results: 756 serial blood samples from 119 patients were analyzed for a total of 8172 miRNA assays, and 1299 CA125 values. The longitudinal kinetics of the miRNA expressions were highly inconsistent, and were not related to CA125 dynamics. The miRNA changes during neoadjuvant treatment were not found associated with RECIST tumor response or IDS outcomes. Decreases of miR-34a-5p and miR-93-5p were associated with PFS benefit (p = .009) and OS benefits (p < .001), respectively, using univariate tests., Conclusions: The longitudinal kinetics of miRNA expressions during neoadjuvant treatment in ovarian cancer patients were inconsistent, and were not found to be associated with tumor burden changes. Although some prognostic value could be discussed, no predictive value regarding tumor responses or IDS quality could be identified., Competing Interests: Declaration of Competing Interest The authors declare no potential conflicts of interest., (Copyright © 2020 Elsevier Inc. All rights reserved.)