Huangqi Guizhi Wuwu Decoction reduces grade 2 or higher OIPN from 38.6% to 21.3%Trial shows HQGZWWD reduces nerve damage from colorectal cancer treatment

BACKGROUND: Oxaliplatin-induced peripheral neuropathy (OIPN) affects up to 80% of patients receiving oxaliplatin-based chemotherapy, and effective preventive strategies remain limited. Huangqi Guizhi Wuwu Decoction (HQGZWWD), a traditional Chinese herbal formula included in China's National Classic Famous Formulas, is widely used for OIPN in clinical practice, but high-quality clinical evidence remains lacking. PURPOSE: This study evaluated the efficacy and safety of HQGZWWD for OIPN prevention and explored its neuroprotective mechanisms. METHODS: We conducted a multicenter, randomized, double-blind, placebo-controlled trial at 12 tertiary hospitals in China. Adults with colorectal cancer scheduled to receive XELOX chemotherapy were randomly assigned (1:1) to oral HQGZWWD granules or placebo (47.5 g per sachet, twice daily) throughout chemotherapy. Participants, outcome assessors, and statisticians were blinded. The primary outcome was the incidence of grade ≥2 chronic OIPN in the modified intention-to-treat population, analyzed using logistic regression with multiple imputation for missing data. RESULTS: A total of 360 participants were enrolled, and 354 were included in the modified intention-to-treat analysis. Grade ≥2 chronic OIPN occurred in 21.3% of patients receiving HQGZWWD group and 38.6% in the placebo group (OR, 0.43; 95% CI, 0.27-0.69; P<0.001). Adverse events were comparable between groups (OR, 1.27; 95% CI, 0.68-2.39; P=0.524). In animal models, HQGZWWD increased pain thresholds, preserved dorsal root ganglia, reduced IL-1β, MCP-1, and MDA levels, and enhanced SOD activity. Consistently, clinical serum enzyme-linked immunosorbent assay (ELISA) analyses further validated these mechanisms, demonstrating that HQGZWWD significantly attenuated chemotherapy-induced elevations of pro-inflammatory cytokines (IL-1β, MCP-1) and oxidative stress marker (MDA), while preserving antioxidant enzyme (SOD) activity in CRC patients receiving XELOX chemotherapy. CONCLUSION: HQGZWWD significantly reduced the incidence of OIPN without increasing toxicity. Preclinical findings suggest that these effects may involve reduced oxidative stress and improved mitophagy. These findings support HQGZWWD as a promising preventive strategy for OIPN. TRIAL REGISTRATION: The trial is registered with ClinicalTrials.gov (NCT04913376).