Ionic Channels And Effect Of Taurine On The Heart

This book is based on papers presented at a Symposium held in Seoul, Korea in 1992. The idea for the symposium developed naturally from work in which Professor Yung E Earm, at Seoul National University, had been involved both in my laboratory in Oxford and in his own laboratory in Seoul concerning the possible role of certain amino acids, like taurine that are strongly concentrated by the cells of the heart, and the relationship between such acids and membrane ionic currents. The first obvious question was whether it is possible to identify the transport mechanisms involved for taurine and whether they are electrogenic. The second question is what function could be served by such processes: does taurine play an essential role in cardiac tissue and is this important in protecting the heart from disease? With his colleagues in the Korean Physiological Society, Professor Earm set about the task of fmancing and organizing a meeting at which some of the world's leading cardiac electrophysiologists and taurine specialists could discuss these questions. The fmance was generously provided by the Dong-A Pharmaceutical Company, one of the leading scientific companies in Korea.

This volume comprises the edited proceedings of the International Taurine Sympo sium held in Osaka, Japan, in June 1995, as a Satellite Symposium of the 15th Biennial of the International Society for Neurochemistry. This Taurine Symposium was the Meeting latest in a series held since 1975 at approximately two-year intervals by an informal group of international researchers. It attracted contributions from 20 countries, ranging from Armenia via Finland and Spain to the United States. Some 121 participants attended. The Symposium was organized and chaired by Junichi Azuma, University of Osaka. Other members of the Organizing Committee in Japan consisted of Kinya Kuriyama and Masao Nakagawa, both from the Kyoto Prefectural University of Medicine, and Akemichi Baba, from Osaka University. The Committee had to contend with the disaster of the Kobe earthquake, which struck on January 21. The epicenter was only around 25 miles from the meeting site, and the quake demolished the home of one Committee member. Despite this unnaturally natural handicap, the participants experienced a superbly organized meeting, one which more than maintained the high social and scientific standards established for this series. In his Welcome Message, Dr. Azuma listed a threefold objective for the Symposium: To provide a forum for the interdisciplinary exchange of information on taurine; to give an opportunity for renewing old friendships and making new friends; and to promote coopera tion among participants from around the world.

The Taurine Symposium- "Taurine: Beginning the 21'' Century"- was held September 20-23, 2002, on the beautiful island of Kauai in Hawaii. The headquarters of the meeting was the Radisson Kauai Beach Resort. This international meeting was attending by approximately 80 individuals from 23 nations and 4 continents. Seventy-five papers were presented either as platform presentations or poster presentations. Taurine, first isolated from ox bile in 1827 by Tiedemann and Gmelin and named in 1838 by Demarcay, became of significant scientific interest in 1968 when the first extensive review article was published by Jacobsen and Smith. Interest in taurine grew exponentially after 1975 when the first taurine symposium was organized by Ryan Huxtable in Tucson, Arizona. Since that date, taurine symposia have been held approximately every two years held in various cities and resort areas around the world. Taurine investigators have had the privilege of attending these scientific meetings on three continents - Asia, Europe, and North America. Since the initial meeting in 1975, a central question addressed during many of the symposia has been: "What is physiological, pharmacological, nutritional, and pathological role of taurine?". Although taurine has been established as an important osmolyte, it appears to affect many other biological processes. However, the exact mechanism(s) by "which taurine acts" has not yet been definitively answered. In Kauai, the patticipants discussed many topics and asked many questions regarding the role and actions of taurine.

Taurine, or 2-aminoethane sulfonic acid, has long been known to be the major organic product formed from the breakdown of the sulfur-containing amino acids, methionine and cysteine. It is excreted as such in the urine or as bile acid conjugates in the bile. Research over the last 25 years, however, has uncovered an amazing variety of phenomena involving taurine. Despite the fact that the mechanism of action of taurine in some of these phenomena remains to be elucidated, it is clear that taurine is of far more physiological relevance than being the mere metabolic debris of sulfur amino acid catabolism. It also has numerous pharmacological actions that are beginning to be developed, as exemplified by some of the studies reported in this volume. This volume reports the proceedings of the latest of a series of international symposia, continuing on from the initial meeting held in Tucson, Arizona, in 1975. The latest symposium was the first to be held in Germany, in Cologne from August 29 through September 1, 1993. It continued the multidisciplinary approach that has been the norm for taurine symposia. We hope the publication of the proceedings will stimulate further investigations on this simple but fascinating compound.

Proceedings of the International Taurine Symposium '97: Neurochemistry, Biochemistry, and Pharmacology held in Tucson, Arizona, July 15-19, 1997

This volume contains the proceedings of the 2nd World Conference of the International Society for Molecular Nutrition & Therapy. This conference was held on August 2-4, 1997, in Winnipeg, Canada. The goal of the conference was to advance our knowledge concerning the molecular events which link nutrition to various disease processes in the body. This volume represents an important compilation of unique articles addressing the molecular and cellular basis for the nutritional and therapeutic treatment of five general disease processes.

This special issue of Molecular and Cellular Biochemistry contains original research papers as well as invited reviews dedi cated, on the occasion of the 40th anniversary of the inauguration of the Heart Research Group in Berlin-Buch that today forms a part there of the Max Delbriick Center for Molecular Medicine, to Professor Albert Wollenberger, founder of the Heart Research Group and for 21 years its head. The papers in this issue are written by researchers working in the field of cardiovascular research who together with Albert Wollenberger share the belief that an integrative application of advances in molecular and cellular biology will lead to new concepts for treatment and prevention of cardiovascular diseases. We hope that this special will serve as a good source of information in this regard. We wish to thank all of the contributors for their help and cooperation. We also wish to thank Mrs. Verona Kuhle for her secretarial help. We are grateful to Dr. Naranjan S. Dhalla, Editor-in-Chief of Molecular and Cellular Biochemistry for his interest and encouragement, and for agreeing to publish this issue in honor of Albert Wollenberger. ROLAND VETTER and ERNST -GEORG KRAUSE Max Delbriick Center for Molecular Medicine, Robert-Rossle-StraBe 10, 13122 Berlin-Buch, Germany PART I CARDIAC DEVELOPMENT AND REGULATION Molecular and Cellular Biochemistry 163/164: 5-11, 1996. © 1996 Kluwer Academic Publishers.

Knowledge of cardiac ion channels and transporters has advanced remarkably in the last two decades with the development of patch-clamp and molecular biological techniques. This textbook offers a comprehensive overview of structures and functions of ion channels and transporters in the heart. Readers are first introduced to the molecular biology and electrophysiology of all the important ion channels. After discussing their developmental changes, the pharmacology and pathophysiology of clinically-relevant ion channels are reviewed. Molecular aspects of the cardiac excitation-contraction coupling and intracellular Ca2+ regulation by ion transporters are also described. The book will be useful to electrophysiologists, cardiac physiologists and pharmacologists, and molecular biologists interested in ion channels at all levels. For research specialists, the book will provide a perspective of the field. The book can be used as a reference source for working scientists in the fields of ion channels, biophysics, cardiac electrophysiology, and pharmacology. It is aimed at graduate and medical students, designed for use as a textbook for graduate and medical courses.