Prostaglandins And Their Inhibitors In Clinical Obstetrics And Gynaecology

It is clear today that several prostaglandins play an important role in the regulation of many of the physiological events of the reproductive organs in the human. Both naturally occurring prostaglandins and their analogues are used routinely in many countries to ripen the cervix and induce labour at term as well as to dilate the cervix and to terminate pregnancy. Prostaglandin biosynthesis inhibitors are widely used in the treatment of primary dysmenorrhoea. The editors have aimed at an accurate, thorough, yet easily under standable review of the status in 1986 of medical knowledge regarding both the physiological importance and the clinical use of prostaglan dins and their inhibitors in obstetrics and gynaecology. I believe this book will be of value for all clinicians concerned with reproductive health. The list of authors guarantees an authoritative and up-to-date review of this active field. SUNE BERGSTROM Karolinska Institutet, Stockholm, Sweden Table Examples of clinical use of natural prostaglandins and some prostaglandin analogues Indications Prostaglandin Route of administration Manufacturer Dilatation of the cervix prior 15-methyl-PGF • Intramuscular Upjohn, USA 2 to vacuum aspiration 16-phenoxy-PGE methyl sulphonylamide Intramuscular Schering AG, West Germany 2 16,16-dimethyl-PGE methyl ester 1 Vaginal ONO, Japan; May & Baker, UK Second trimester abortion Intra -amniotic Upjohn, USA; ONO, Japan PGF 20 Upjohn, USA PGE Vaginal 2 Upjohn, USA 15-methyl-PGF 2.

This is the fourth in a series of books on Advances in Prostaglandin Research published by MTP Press. From laboratory and animal studies a large number of practical applications of prostaglandins have been identified. In some areas clinical trials have also been carried out. There is usually a long time interval between identifying practical applications of new drugs and clinical trials. Most of the information on practical applications of prostaglandins is scattered in different journals. Although a number of books dealing with prostaglandin research have been published (including some on practical applications in specific areas, e.g. reproduction) there is no single volume dealing with all areas of practical applications of these substances. This book aims at filling this gap and should be of interest to clinicians as well as to medical and basic scientists in academic institutions and in the pharmaceutical industry. In some areas, exciting potential applications of prostaglandins have been identified from basic research but clinical trials have so far not been carried out. Such areas of practical applications are covered in a separate intro ductory chapter. All contributors to the volume are scientists and clinicians actively engaged in prostaglandin research and most are recognized authorities in specific areas. The need for rapid publication in a fast-expanding field is obvious.

The role of prostaglandins in physiological events and pathological disorders related to human reproduction has been most actively investigated in the past decade. Their clinical use for fertility regulation, extensively evaluated, represents the most common clinical indication for the administration of these remarkable compounds. Thus, it is most appropriate to update the available information related to the use of prostaglandins in the regulation of human fertility to provide a background document for the benefit of clinicians and scientists. Invited experts of international reputation from various parts of the world have contributed, each in his own area of interest, to offer this book, which we hope will fill an existing gap. M. T. M. B. E. S. E. H. ix 1 Potential for prostaglandin use in controlling human reproduction K. T. KIRTON and F. A. KIMBALL BACKGROUND It was observed in 1930 that seminal plasma of a number of species contained very large amounts of substance(s) capable of altering uterine motility. These substances were subsequently demonstrated to be prostaglandins (PGs); this began the early and continued association of this group of compounds with reproduction. The activity was found to be associated with a fraction containing lipid-soluble acids, derived from prostanoic acid. Restrictions imposed by obscure sources and small amounts of material available for testing were initially impediments to their study.

The introduction of prostaglandins into clinical practice has been one of the most important advances in obstetrics and gynaecology in recent years. During the last decade obstetricians have become familiar with these drugs for inducing labour and for terminating second-trimester pregnancy. Within the last year their use has been extended, in association with antiprogestin, to first-trimester termi nation. Although the effectiveness of prostaglandins in these pharma cological roles is clear, their full potential has still to be explored, and much remains to be learned about their physiology. Prostaglandins playa central role in the initiation of labour. Further clarification of this role could lead to improvements in preventing or treating preterm labour, which still remains the most important cause of perinatal mortality in this country. Prostaglandins are also inti mately involved in the mechanism of menstruation. More detailed understanding of this role should lead to more effective treatments for menorrhagia and dysmenorrhoea. These substances also playa part in the mechanism of implantation, and further research in this area may lead to more effective therapy for infertility.