RESUMEN
The pectin isolated from the juice of the inflorescence stalk of plantain (Musa sapientum) has been found to show significant hypoglycemic effect both in normoglycemic and alloxan diabetic rats. After its administration at a dose of 20mg/100g body weight, there was increase in the concentration of hepatic glycogen, increased glycogenesis as evident from the increased activity of glycogen synthetase and in normoglycemic rats increased incorporation of labelled glucose into hepatic glycogen. Glycogenolysis and glyconeogenesis were lower as was evident from the decreased activity of glycogen phosphorylase and gluconeogenic enzymes.
RESUMEN
A pectin present in the juice of the inflorescence stalk of plantain (Musa sapientum) has been isolated. The material contained 32·4% hexoses and 52·5% uronic acid. On administration to rats fed both cholesterol free and cholesterol diet, this material showed significant lowering of cholesterol and triglycerides in the serum, liver and aorta. There was decreased cholesterogenesis in the liver as was evident from decreased activity of hydroxymethylglutaryl coenzyme A reductase and decreased incorporation of labelled acetate into hepatic cholesterol. Hepatic bile acids showed significant increase and there was increased fecal excretion of neutral sterols and bile acids. Release of lipoproteins into the circulation was lower. The material also caused increase in the activity of lipoprotein lipase in the heart and adipose tissue and also of plasma lecithin: cholesterol acyl transferase.