New insights into spexin and pituitary adenylate cyclase-activating polypeptide (PACAP) in regulating fish reproduction

Q1 Agricultural and Biological Sciences
Ashis Saha , Mrinal Samanta , Hirak kumar Barman , Shiba Shankar Giri
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引用次数: 0

Abstract

Reproduction is one of the most crucial physiological processes for the continuation of the generation of any species. Teleost are one of the most divergent aquatic species. The reproductive neuro-endocrine regulatory studies are limited to only few species. Neuroendocrine regulation is a finely tuned complex mechanistic pathways, involving mainly hypothalamic-pituitary-gonad (HPG) axis. Within the HPG axis, gonadotropin-releasing hormone (GnRH) modulates the synthesis and release of pituitary gonadotropins, which act on the gonads to stimulate steroidogenesis and gametogenesis. Very recently, several novel neuropeptides, associated with reproductive regulation, have been identified. Spexin (SPX), a novel neuropeptide coevolved with the galanin/kisspeptin family, has been identified as a regulator of the species-specific reproductive processes in teleost. Pituitary adenylate cyclase-activating polypeptide (PACAP) is another novel member of the secretin-glucagon peptide family that functions as a hypophysiotropic factor involved in regulating pituitary hormone secretion in fish. These two emerging neuropeptides have pleiotropic functions, but information regarding their exact roles in fish reproduction is very limited. An updated overview of the mechanistic reproductive functions of these two new neuropeptides are highlighted in this review.

矛毒素和垂体腺苷酸环化酶激活多肽(PACAP)调节鱼类繁殖的新发现
繁殖是任何物种延续世代的最关键生理过程之一。远洋鱼类是差异最大的水生物种之一。生殖神经内分泌调控研究仅限于少数物种。神经内分泌调节是一个精细调整的复杂机制途径,主要涉及下丘脑-垂体-性腺轴(HPG)。在 HPG 轴中,促性腺激素释放激素(GnRH)调节垂体促性腺激素的合成和释放,促性腺激素作用于性腺,刺激类固醇生成和配子生成。最近,人们发现了几种与生殖调节有关的新型神经肽。Spexin(SPX)是一种与galanin/kisspeptin家族共同进化的新型神经肽,已被确认为调节远洋鱼类特定物种生殖过程的一种神经肽。垂体腺苷酸环化酶激活多肽(PACAP)是胰泌素-胰高血糖素肽家族的另一个新成员,它是一种参与调节鱼类垂体激素分泌的低促性腺激素。这两种新出现的神经肽具有多种功能,但有关它们在鱼类繁殖中的确切作用的信息却非常有限。本综述将对这两种新神经肽的生殖机理功能进行最新概述。
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来源期刊
Aquaculture and Fisheries
Aquaculture and Fisheries Agricultural and Biological Sciences-Aquatic Science
CiteScore
7.50
自引率
0.00%
发文量
54
审稿时长
48 days
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