BACKGROUND: No data exist on cholesterol absorption in patients with an ileoanal anastomosis (IAA). AIMS: To study cholesterol absorption and its effects on cholesterol and bile acid metabolism in patients with an IAA. PATIENTS AND METHODS: Cholesterol absorption, and serum, biliary, and faecal lipids were studied in 24 patients with an IAA and 20 controls. RESULTS: Fractional cholesterol absorption was significantly lower in the patients (36% versus 47% in controls). Surprisingly, the calculated intestinal influx of endogenous cholesterol was reduced so that the absolute absorption of cholesterol was decreased; elimination of cholesterol as faecal neutral steroids remained normal. Thus, the slightly increased cholesterol synthesis was mainly due to increased faecal bile acid excretion, which, in turn, was associated with reduced absorption and biliary secretion of bile acids. Serum total and low density lipoprotein (LDL) cholesterol and LDL triglycerides were lower in the patients. Molar percentage and saturation index of biliary cholesterol were slightly higher in patients with an IAA. Proportions of secondary bile acids in bile and faeces were diminished, and faecal unidentified bile acids were higher in patients. CONCLUSIONS: Cholesterol absorption is significantly impaired in patients with an IAA, and is closely related to changes in serum and biliary lipids observed in these patients.
BACKGROUND: No data exist on cholesterol absorption in patients with an ileoanal anastomosis (IAA). AIMS: To study cholesterol absorption and its effects on cholesterol and bile acid metabolism in patients with an IAA. PATIENTS AND METHODS: Cholesterol absorption, and serum, biliary, and faecal lipids were studied in 24 patients with an IAA and 20 controls. RESULTS: Fractional cholesterol absorption was significantly lower in the patients (36% versus 47% in controls). Surprisingly, the calculated intestinal influx of endogenous cholesterol was reduced so that the absolute absorption of cholesterol was decreased; elimination of cholesterol as faecal neutral steroids remained normal. Thus, the slightly increased cholesterol synthesis was mainly due to increased faecal bile acid excretion, which, in turn, was associated with reduced absorption and biliary secretion of bile acids. Serum total and low density lipoprotein (LDL) cholesterol and LDL triglycerides were lower in the patients. Molar percentage and saturation index of biliary cholesterol were slightly higher in patients with an IAA. Proportions of secondary bile acids in bile and faeces were diminished, and faecal unidentified bile acids were higher in patients. CONCLUSIONS:Cholesterol absorption is significantly impaired in patients with an IAA, and is closely related to changes in serum and biliary lipids observed in these patients.
Authors: J M Salemans; F M Nagengast; A Tangerman; A Van Schaik; A F de Haan; J B Jansen Journal: Scand J Gastroenterol Date: 1993-09 Impact factor: 2.423
Authors: Elisa Tiratterra; Placido Franco; Emanuele Porru; Konstantinos H Katsanos; Dimitrios K Christodoulou; Giulia Roda Journal: Ann Gastroenterol Date: 2018-02-14
Authors: Xin Fang; Yoshiki Vázquez-Baeza; Emmanuel Elijah; Fernando Vargas; Gail Ackermann; Gregory Humphrey; Rebecca Lau; Kelly C Weldon; Jon G Sanders; Morgan Panitchpakdi; Carolina Carpenter; Alan K Jarmusch; Jennifer Neill; Ara Miralles; Parambir Dulai; Siddharth Singh; Matthew Tsai; Austin D Swafford; Larry Smarr; David L Boyle; Bernhard O Palsson; John T Chang; Pieter C Dorrestein; William J Sandborn; Rob Knight; Brigid S Boland Journal: Inflamm Bowel Dis Date: 2021-04-15 Impact factor: 5.325