Carboplatin In Treatment Of Patients Research Articles

Final results of a pilot study of docetaxel and carboplatin for treatment of patients with mCRPC containing biallelic inactivation of genes in the homologous recombination DNA repair pathway.

5054 Background: Inactivating mutations in genes important in homologous recombination DNA repair (HRD) are present in the tumors of ~25% of patients with metastatic castration resistant prostate cancer (mCRPC). These alterations are associated with more aggressive disease but may also predict vulnerability to DNA damaging agents. We previously reported promising interim results from a single arm, Phase 1/2 trial studying the combination of the DNA damaging agent carboplatin with docetaxel for patients with mCRPC containing HRD mutations. Here we report final results after completing accrual and two additional years of follow up. Methods: We assessed response to the combination of docetaxel 60mg/m2 and carboplatin AUC 5 IV q21 days in patients with mCRPC whose tumors had evidence of biallelic inactivation of genes involved in HRD and who had progressed on any prior treatment, including docetaxel and/or PARP inhibitor (PARPi). The primary endpoint was the proportion of patients who achieved ≥50% PSA decline from baseline (PSA50). With H0 of PSA50 of 26%, 14 patients provided 80% power to conclude H1 of PSA50 of 60% based on Simon's 2-stage design with 1-sided α = 5%. The secondary endpoints included PSA30, response duration, progression-free survival (PFS), and overall survival (OS). Results: The trial opened in Jan 2016 and completed in Sep 2021. A total of 16 patients were treated on study, including 6 who had previously received PARPi and 5 who had received docetaxel. 11/16 patients (69%) achieved PSA50. 7/9 patients (78%) with biallelic inactivation of BRCA2 (7), BRCA1 (1), or PALB2 (1) achieved PSA50. Other biallelic inactivated HRD-related genes were ATM (1), CHD1 (1), CDK12 (3), MRE11A (1), and NBN (1). Of these patients, 4/7 (57%) achieved PSA50. Notably, 3/6 patients (50%) previously treated with PARPi therapy achieved PSA50. The median PFS was 8.4 months, and the median OS was 2 years. 6/16 patients (38%) had grade 3 AEs, most commonly thrombocytopenia (25%) and anemia (13%). One patient (6%) had a grade 4 AE (thrombocytopenia). Conclusions: The addition of carboplatin to docetaxel significantly improved response rates in patients with mCRPC with biallelic inactivation in genes involved in the HRD pathway. Responses were also seen in patients who had previously received PARPi. The combination was relatively safe and well-tolerated. The encouraging activity and favorable toxicity profile observed here merits further investigation. Additional work is ongoing to further refine biomarkers predictive of treatment response and resistance. Clinical trial information: NCT02598895 .

Randomized Phase II Study with Cetuximab in Combination with 5-FU and Cisplatin or Carboplatin vs. Cetuximab in Combination with Paclitaxel and Carboplatin for Treatment of Patients with Relapsed or Metastatic Squamous Cell Carcinoma of the Head and Neck (CETMET Trial).

Simple SummaryThe purpose of the CET-MET trial was to find a new platinum- based chemotherapy regimen in combination with cetuximab for relapsed or metastatic squamous cell carcinoma of the head and neck (RM- SCCHN), that would achieve an equivalent PFS with standard cetuximab and 5-FU/platinum-based chemotherapy (EXTREME regimen), albeit with less toxicity. RM-SCCHN is a disease which affects patients with severe comorbidity and unhealthy life styles, rendering it difficult to treat with toxic regimens such as the EXTREME trial regimen. Immune checkpoint inhibition (ICI) with/or without the addition of chemotherapy has recently been introduced as a first- line treatment option for RM-SCCHN. However, these new treatment options will not be suitable for all patients. The experimental arm of this trial with Cetuximab and paclitaxel/carboplatin is easier to administer and perhaps more beneficial to combine with ICIs due to its favorable toxicity profile and the potential immunomodulatory effects of taxanes.Background: Platinum-based chemotherapy with cetuximab is the standard of care for relapsed or metastatic squamous cell carcinoma of the head and neck (SCCHN). The aim of this trial was to investigate whether cetuximab and paclitaxel/carboplatin can achieve similar progression-free survival (PFS) with standard cetuximab and 5-FU/platinum-based chemotherapy. Standard chemotherapy treatment for SCCHN is related to severe toxicity and new, less toxic regimens are needed. Methods: In this multicentre, randomized, controlled, phase 2 trial, 85 patients with relapsed or metastatic SCCHN were randomized in a 1:1 ratio to cetuximab and 5-FU/cisplatin or carboplatin (arm A) vs. cetuximab and paclitaxel/carboplatin (arm B). Eligibility criteria included age ≥18 years, Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0–1, and adequate organ functions. The primary endpoint was to investigate whether PFS in arm B is significantly worse than PFS in arm A. Results: Median PFS in arm A was 4.37 months (95% CI: 2.9–5.9 m) and 6.5 months (95% CI: 4.8–8.2 m) in arm B, (p = 0.064). Median overall survival (OS) was 8.4 months (95% CI: 5.3–11.5 m) in arm A and 10.2 months (95% CI: 5.4–15 m) in arm B, (HR = 0.71; 95% CI: 0.43–1.16). PFS HR for arm B was not significantly worse than arm A (HR = 0.65; 95% CI: 0.41–1.03). Adverse events ≥ grade 3 were more frequent in arm A than arm B (60% vs. 40%; p = 0.034). Conclusion: Cetuximab and paclitaxel/carboplatin was found to have similar efficacy and less toxicity compared to cetuximab and 5-FU/cisplatin or carboplatin. The experimental arm is easier to administer rendering it a favorable alternative to standard therapy.

A pilot study of docetaxel and carboplatin for treatment of patients with mCRPC containing biallelic inactivation of genes in the BRCA1/2 pathway.

127 Background: Despite new treatments, metastatic castration resistant prostate cancer (mCRPC) remains ultimately lethal. Upwards of 25% of mCRPC tumors have alterations in homologous recombination DNA repair (HRD) genes, most frequently BRCA2. Retrospective data suggest addition of the DNA damaging agent carboplatin to standard docetaxel for patients with mCRPC whose tumors have biallelic inactivation of BRCA2 may be effective. Methods: In this prospective, pilot single-arm phase 2 study, we assess response to the combination of docetaxel 60mg/m2 and carboplatin AUC 5 IV q21 days in patients with mCRPC whose tumors have evidence of biallelic inactivation of BRCA1, BRCA2 or ATM and have progressed after any prior treatment, including prior docetaxel and/or PARP inhibitor (PARPi). The primary endpoint is rate of ≥50% PSA decline from baseline (PSA50). With H0 of PSA50 of 26%, 14 patients will provide 80% power to conclude H1 of PSA50 of 60% based on Simon's 2-stage design with 1-sided α = 5%. Secondary endpoints include PSA30, response duration, time to progression and correlative studies. Biallelic inactivation of other HRD-related genes were included at investigators’ discretion. Results: The study opened in Jan 2016 and has enrolled 8/14 (57%) of patients plus 5 patients with other HRD-related genes. 6/13 (46%) treated pts had grade 3 expected AEs, and no grade 4-5 AEs were observed. To date, 7/8 (88%) of pts with biallelic inactivation of BRCA1, BRCA2 and ATM (Table) and 10/13 (77%) of all pts achieved a PSA50 (other HRD-related genes include CDK12, CHD1, MRE11A and PALB2). Updated results will be reported at final presentation. Conclusions: Addition of carboplatin to docetaxel appears to be well-tolerated and effective for patients with mCRPC whose tumors have biallelic inactivation in selected HRD genes such as BRCA2, including those with prior treatment with PARP inhibitor. Clinical trial information: NCT02598895. [Table: see text]

Randomised phase II study with cetuximab in combination with 5-FU and cisplatin or carboplatin versus cetuximab in combination with paclitaxel and carboplatin for treatment of patients with relapsed or metastatic squamous cell carcinoma of the head and neck (CETMET trial).

6032Background: Platinum-based chemotherapy with cetuximab is the standard of care for relapsed or metastatic squamous cell carcinoma of the head and neck (SCCHN). The aim of this trial was to inve...

Carboplatin in treatment of patients with bronchogenic carcinoma: Skrickova J, Vorlicek J, Adam Z, Kralovcova D, Hejlova N, Tomiska M et al. Nemocnice Tuberkul. a Resp. Nemoci, NsP Brno-Venkov, Babice nad Svitavou. Klin Onkol 1995;8:16–19

Carboplatin in treatment of patients with bronchogenic carcinoma: Skrickova J, Vorlicek J, Adam Z, Kralovcova D, Hejlova N, Tomiska M et al. Nemocnice Tuberkul. a Resp. Nemoci, NsP Brno-Venkov, Babice nad Svitavou. Klin Onkol 1995;8:16–19