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Do recommended textbooks contain adequate information about bile salt transporters for medical students?

Faculty Education Unit (FEU), Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville 3010, Victoria, Australia

Address for reprint requests and other correspondence: S. A. Azer, FEU, Faculty of Medicine, Dentistry and Health Sciences, Univ. of Melbourne, Parkville 3010, Victoria, Australia (E-mail: samy{at}unimelb.edu.au)

Abstract

Several studies have recently highlighted a number of limitations in medical textbooks. The aims of this study were to 1) to assess whether available medical textbooks provided students with adequate information about bile salt transporters, 2) compare the level of detail and the amount of information provided in current textbooks on hepatic transport mechanisms with those available in the literature, and 3) compare the amount of information provided in medical textbooks on hepatocyte transport mechanisms with those involving other transporters e.g., those found in the nephron. Seventy medical textbooks from disciplines including physiology, pathology, cell biology, medicine, pediatrics, pharmacology, pathophysiology, and histology published during the past six years were examined. The literature on bile salt transport has been searched mainly from the Internet (MEDLINE and PubMed). Most textbooks failed to provide any information on transporters found in the basolateral and canalicular membranes of hepatocytes. There are also deficiencies in information on bile salt transporters in the terminal ileum. However, up to the end of 2002, 3,610 articles and reviews had been published on hepatobiliary and enterocyte transport of bile salts. During the same period (from 1965), 10,757 articles had been published on renal transport. Thus the contents of textbooks may reflect the overall volume of research knowledge on renal transport. However, despite our current understanding of hepatic and intestinal transport of bile salts and extensive research, particularly over the past 12 years, there are major deficiencies in textbooks in this area. These findings indicate that there is an imbalance in the contents of current textbooks and a lack of information about hepatobiliary physiology, bile salt transporters, bile formation, and mechanisms underlying cholestasis and drug-induced injury. Authors, editors, and publishers of medical textbooks should consider the need to update the information provided on bile salt transporters.

Key words: review; Internet; problem-based learning; self-directed learning; literature; epithelial cell transporters; medical education; medical students

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