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Adrenergic and Cholinergic Uterine Innervation and the Impact on Reproduction in Aged Women

[ Vol. 26 , Issue. 3 ]

Author(s):

Ioannis P. Kosmas, Antonio Malvasi, Daniele Vergara, Ospan A. Mynbaev, Radmila Sparic and Andrea Tinelli*   Pages 358 - 362 ( 5 )

Abstract:


In recent years, the development of Assisted Reproductive Technique, the egg and embryo donation changed substantially the role of the uterus in recent years. It provided a higher chance for a pregnancy even in women over 45 years or post-menopause. In fact, the number of aged patients and in peri/post-menopause in pregnancy is nowadays increasing, but it increases obstetrical and neonatal related problems. The human uterus is richly innervated and modified especially during pregnancy and labor, and it is endowed with different sensory, parasympathetic, sympathetic and peptidergic neurofibers. They are differently distributed in uterine fundus, body and cervix, and they are mainly observed in the stroma and around arterial vessel walls in the myometrial and endometrial layers. Many neurotransmitters playing important roles in reproductive physiology are released after stimulation by adrenergic or cholinergic nerve fibers (the so called sympathetic/parasympathetic co-transmission). Immunohistochemical study demonstrated the localization and quantitative distribution of neurofibers in the fundus, the body and cervix of young women of childbearing age.

Adrenergic and cholinergic effects of the autonomous nervous system are the most implicated in the uterine functionality. In such aged women, the Adrenergic and AChE neurofibers distribution in the fundus, body and cervix is progressively reduced by increasing age. Adrenergic and AChE neurotransmitters were closely associated with the uterine arteries and myometrial smooth muscles, and they reduced markedly by ageing. The Adrenergic and AChE neurofibers decreasing has a dramatical and negative impact on uterine physiology, as the reduction of pregnancy chance and uterine growth, and the increase of abortion risk and prematurity.

Keywords:

Adrenergic fibers, acetylcholine positive fibers, reproduction, pregnancy, fertility, assisted reproductive technique, abortion.

Affiliation:

Ioannina State General Hospital G. Hatzikosta, Department of Obstetrics and Gynecology, University of Ioannina, Department of Obstetrics & Gynecology, Santa Maria Hospital, GVM Care & Research, Bari, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Laboratory of Human Physiology, Phystech BioMed School, Faculty of Biological & Medical Physics, Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region, Clinical Centre of Serbia, Clinic for Gynecology and Obstetrics, and University of Belgrade, School of Medicine, Belgrade, Department of Obstetrics and Gynecology, “Veris delli Ponti” Hospital, Scorrano, Lecce



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