Evaluation of sirtuin 1 serum level and gene expression in patients with metabolic syndrome accompanied by metabolic dysfunction-associated steatotic liver disease - Fawzy A.F. Elmessallamy; Mayada M. Mousa; Ahmad Sallam Soliman; Osama Ibrahim El-Dosoky; Samia Hussein; Basma S. Elsayed; Sara Mohamed Osama (The Egyptian Journal of Internal Medicine, 2026)