Endocrine · 2024
Impact of cortisol on liver fat and metabolic health in adrenal incidentalomas and Cushing's syndrome.
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Yu Peng, Yuan Haoyue, Li Xiaomu, Chen Hong
Аннотация
OBJECTIVE: To evaluate liver fat content in patients with non-functional adrenal incidentalomas (NFAI), mild autonomous cortisol secretion (MACS), and Cushing's syndrome (CS), and assess its relationship with cortisol levels.
METHODS: This cross-sectional study used retrospective data from 103 NFAI patients, 100 MACS (serum cortisol after a 1-mg dexamethasone test >50 nmol/L), and 59 with CS. Abdominal CT scans measured hepatic and splenic CT values to calculate the liver-to-spleen (L/S) ratio. Metabolic indicators including fasting plasma glucose (FPG), LDL-c, HDL-c, HbA1c, etc were measured. Mediation analysis was used to explore the indirect effects of metabolic traits on the cortisol-liver fat relationship.
RESULTS: Patients included 103 NFAI, 100 MACS, and 59 CS. MACS patients had higher NAFLD prevalence (57%) than NFAI (26.2%, p < 0.001) but lower than CS (66.1%, p < 0.001). MACS and CS were associated with NAFLD (OR 3.83 and OR 5.73, p < 0.01), adjusted for age, body mass index (BMI), and covariates. Midnight serum cortisol correlated with L/S ratio (p < 0.001). HbA1c and Triglyceride-glucose index (TyG) mediated 24.5% and 49.5% of the cortisol and L/S ratio association, respectively. FPG, HbA1c, HDL-c, and TyG mediated the association between MACS or CS and the L/S ratio. Homeostasis model assessment of insulin resistance (HOMA-IR), fructosamine, and triglycerides mediated for MACS, while alkaline phosphatase did so for CS. Total cholesterol, LDL-c, ALT, AST, γ-GT, insulin, and uric acid did not mediate the association.
CONCLUSION: MACS and CS are linked to significant metabolic disturbances, including increased liver fat and impaired glucose and lipid metabolism, contributing to fatty liver.
METHODS: This cross-sectional study used retrospective data from 103 NFAI patients, 100 MACS (serum cortisol after a 1-mg dexamethasone test >50 nmol/L), and 59 with CS. Abdominal CT scans measured hepatic and splenic CT values to calculate the liver-to-spleen (L/S) ratio. Metabolic indicators including fasting plasma glucose (FPG), LDL-c, HDL-c, HbA1c, etc were measured. Mediation analysis was used to explore the indirect effects of metabolic traits on the cortisol-liver fat relationship.
RESULTS: Patients included 103 NFAI, 100 MACS, and 59 CS. MACS patients had higher NAFLD prevalence (57%) than NFAI (26.2%, p < 0.001) but lower than CS (66.1%, p < 0.001). MACS and CS were associated with NAFLD (OR 3.83 and OR 5.73, p < 0.01), adjusted for age, body mass index (BMI), and covariates. Midnight serum cortisol correlated with L/S ratio (p < 0.001). HbA1c and Triglyceride-glucose index (TyG) mediated 24.5% and 49.5% of the cortisol and L/S ratio association, respectively. FPG, HbA1c, HDL-c, and TyG mediated the association between MACS or CS and the L/S ratio. Homeostasis model assessment of insulin resistance (HOMA-IR), fructosamine, and triglycerides mediated for MACS, while alkaline phosphatase did so for CS. Total cholesterol, LDL-c, ALT, AST, γ-GT, insulin, and uric acid did not mediate the association.
CONCLUSION: MACS and CS are linked to significant metabolic disturbances, including increased liver fat and impaired glucose and lipid metabolism, contributing to fatty liver.