Subcellular distribution of calcium during spermatogenesis of zebrafish, Danio rerio

Journal of Morphology
Amin GolpourHamid Niksirat

Abstract

Calcium plays a variety of vital regulatory functions in many physiological and biochemical events in the cell. The aim of this study was to describe the ultrastructural distribution of calcium during different developmental stages of spermatogenesis in a model organism, the zebrafish (Danio rerio), using a combined oxalate-pyroantimonate technique. Samples were treated by potassium oxalate and potassium pyroantimonate during two fixation stages and examined using transmission electron microscopy to detect electron dense intracellular calcium. The subcellular distribution of intracellular calcium was characterized in spermatogonium, spermatocyte, spermatid, and spermatozoon stages. The area which is covered by intracellular calcium in different stages was quantified and compared using software. Isolated calcium deposits were mainly detectable in the cytoplasm and the nucleus of the spermatogonium and spermatocyte. In the spermatid, calcium was partially localized in the cytoplasm as isolated deposits. However, most calcium was transformed from isolated deposits into an unbound pool (free calcium) within the nucleus of the spermatid and the spermatozoon. Interestingly, in the spermatozoon, calcium was mainly localized in a form ...Continue Reading

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Citations

Jun 17, 2019·Reviews on Environmental Health·Mahdiyeh MirnamnihaAsghar Beigi Harchegani
Dec 6, 2020·International Journal of Molecular Sciences·Xiaoning ZhangXuhui Zeng
Mar 17, 2021·Toxicology in Vitro : an International Journal Published in Association with BIBRA·Vanessa Staldoni de OliveiraFátima Regina Mena Barreto Silva
Jun 22, 2020·Ecotoxicology and Environmental Safety·Hemily Batista-SilvaFátima Regina Mena Barreto Silva

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