A subgroup analysis of the MiroCIP study to evaluate chemotherapy-induced peripheral neuropathy: symptom profile, severity, and analgesia efficacy depending on type of chemotherapy

The multicenter, prospective MiroCIP observational study investigated the incidence, risk factors, and outcomes of chemotherapy-induced peripheral neuropathy (CIPN) by oxaliplatin- and taxane-based chemotherapies but did not examine their differences in detail. This post hoc subanalysis explored the differences between oxaliplatin- and taxane-based chemotherapy, in terms of CIPN symptom profile, severity, and response to analgesics. Patients with colorectal, gastric, non-small cell lung, or breast cancer, scheduled to receive oxaliplatin- or taxane-based chemotherapy, were followed for 12 months to assess the severity of sensory CIPN, by the Common Terminology Criteria for Adverse Events, and associated subjective and objective symptoms. Overall, 91 patients received oxaliplatin and 131 received a taxane. At 12 months, CIPN prevalence was 74.6% with oxaliplatin and 55.2% with a taxane. Grade ≥ 2 CIPN peaked at 9 months with oxaliplatin and at 3 months with a taxane, with most symptom scores following a similar trajectory. Analgesic efficacy differed between subgroups, providing marked reductions in pain/tingling scores in the taxane group but minimal effect in the oxaliplatin group. CIPN course and symptoms vary with oxaliplatin- or taxane-based chemotherapy. Effective management should be tailored to the type of chemotherapy: oxaliplatin-treated patients may benefit from continuous monitoring of CIPN symptoms, whereas it may be beneficial for taxane-treated patients to receive appropriate analgesics at CIPN onset. Japan Registry of Clinical Trials jRCTs031210101.