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Biological Esterification of Steroids¹

Department of Obstetrics and Gynecology, Comprehensive Cancer Center, Yale University School of Medicine, New Haven, Connecticut 06510

I. Introduction

A. Obfuscating chemistry and the presumptive steroid acetates

B. Sterol esters: substrates for the cholesterol side-chain cleavage enzyme

II. Lipoidal Derivatives of ⁵-3ß-Hydroxysteroids in the Adrenal and Ovary

A. Endogenous steroid esters

B. Biosynthetic esterification of ⁵-3ß-hydroxy-steroids

III. Lipoidal Derivatives of Steroids in Peripheral Tissues

A. Esterification of steroid hormones

B. Esterification of ⁵-3ß-hydroxysteroids

C. Endogenous esters of sex steroids

D. Androsterone esters in breast cyst fluid

IV. Lipoidal Derivatives Synthesized by Lecithin:Cholesterol Acyltransferase

A. Blood

B. Ovarian follicular fluid

V. Steroid Esterases

VI. Lipoidal Derivatives of Steroid Hormones in Insects

VII. Biological Effects of Steroid Esterification

A. Potent sex steroids

B. Unique actions of the steroid esters in blood

VIII. Conclusion