Histochemical demonstration of a concomitant reduction in neural vasoactive intestinal polypeptide, acetylcholinesterase, and noradrenaline of cat uterus during pregnancy

Neuroscience
P AlmF Sundler

Abstract

Noradrenaline, acetylcholinesterase, and vasoactive intestinal polypeptide (VIP) were visualized in uterine nerves of cats by histochemical techniques. Alterations were followed in different regions of the organs at various stages of pregnancy and compared with the situation in non-pregnant controls. Positively stained nerve fibres, the adrenergic type being particularly well developed, were found along the muscle bundles and around blood vessels in the smooth muscle layers, as well as in the mucosa, of both uterine horns and cervix. The nerve supply was especially prominent in the upper part of the cervix. The distribution of VIP-immunoreactive and acetylcholinesterase-positive nerve fibres resembled each other, but they were less numerous than the adrenergic fibres. In the course of pregnancy there was a marked reduction in the number of all positively reacting nerves, so that almost no fibres were visible in the uterine horns near term. A small number of positive nerve fibres was found to remain, however, in the wall of the sterile (empty) horn during unilateral pregnancy. The reduction was less prominent in the cervix, particularly its lower part. Distinct changes were encountered already during early and mid pregnancy in t...Continue Reading

References

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Citations

Oct 1, 1993·Comparative Biochemistry and Physiology. C, Comparative Pharmacology and Toxicology·J L MedinaM I Rudolph
Dec 19, 1998·Journal of the Autonomic Nervous System·K WasowiczM Lakomy
Jan 30, 2002·Peptides·J J CollinsR E Papka
Jan 1, 1995·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·S TakahashiL Sokoloff
Jun 1, 1997·The American Journal of Physiology·R K RiemerE S Natuzzi
Jun 1, 1993·Asia-Oceania Journal of Obstetrics and Gynaecology·T OkawaH Nakanishi

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