Potential role of Geriatric Nutritional Risk Index as a risk factor for immune-mediated adverse events during durvalumab plus tremelimumab therapy in unresectable hepatocellular carcinoma.

[BACKGROUND] Immune-mediated adverse events (imAEs) are a significant concern in patients with unresectable hepatocellular carcinoma (uHCC) undergoing combination immunotherapy with durvalumab and tremelimumab (Dur/Tre). This study aimed to investigate the potential association of risk factors, particularly nutrition and immune markers, associated with the development of imAEs.

[METHODS] Between November 2022 and December 2024, 312 patients with uHCC treated with Dur/Tre were enrolled and retrospectively analyzed. Clinical characteristics, inflammatory markers, and nutritional indices (Geriatric Nutritional Risk Index [GNRI], body mass index, Prognostic Nutritional Index-Onodera, C-reactive protein-to-albumin ratio, neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio) were evaluated to identify predictors for imAE development.

[RESULTS] The imAEs occurred in 122 patients (39.1%), most commonly affecting dermatological, gastrointestinal, and endocrine systems. On multivariate analysis, only normal GNRI (≥ 98) was independently associated with a higher incidence of imAE (odds ratio: 1.99, 95% confidence interval: 1.05-3.79, P = 0.036). Patients with GNRI ≥ 98 also showed better overall survival (OS) than those with GNRI < 98 (not reached vs. 12.5 months, P < 0.001). Among patients who developed imAEs, no significant differences were observed in the imAE types or high-dose steroid use between the GNRI ≥ 98 group (n = 66) and the GNRI < 98 group (n = 56) (40.9% vs. 58.9%, P = 0.069).

[CONCLUSIONS] Normal GNRI status (≥ 98) was associated with an increased risk of imAE development and improved OS in patients with uHCC receiving Dur/Tre therapy. GNRI may be a useful clinical factor for identifying patients at higher risk of developing imAEs.