Immunonutrition Effects on Nutrition and Immunity in HNC During Radiotherapy

Head and neck cancer (HNC) is one of the most common types of malignant tumors, often leading to malnutrition due to its complex anatomical location near many functional organs. Radiotherapy, an essential treatment modality for HNC, can exacerbate malnutrition, potentially causing radiotherapy failure. Both domestic and international guidelines advocate early nutritional intervention for HNC patients at risk of malnutrition; however, specific recommendations on the type of nutritional treatment are lacking. Immunonutrition has shown promise in regulating the immune microenvironment, enhancing immune response, and reducing radiotherapy side effects compared to conventional nutritional interventions. However, there is a lack of studies focusing on immunonutritional therapy during the radiotherapy process for HNC in China. Therefore, this study aims to investigate the effects of immunonutrition on nutritional status, immune function, and quality of life (QoL) in head and neck cancer (HNC) patients undergoing radiotherapy. This prospective interventional study enrolled 48 head and neck cancer (HNC) patients scheduled to undergo radiotherapy (with or without concurrent chemotherapy). All participants received an immunonutrition formula supplemented with arginine, ω-3 fatty acids, and nucleotides. Throughout the radiotherapy course, certified dietitians and oncology nurses provided standardized nutritional guidance based on a five-step nutritional management protocol. Primary outcomes included:Radiotherapy-related adverse events (e.g., mucositis, dysphagia) assessed at four time points during radiotherapy (weeks 1, 3, 5, and 7) using CTCAE v4.0 criteria;Longitudinal changes in nutritional status (serum albumin, BMI), immune-related biomarkers , and quality of life were assessed at baseline, mid-radiotherapy (week 4), and post-treatment (week 7).