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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The efficiency of spermatogenesis and the support capacity of Sertoli cells in Characiformes

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Author(s):
Rodrigues, Maira da Silva [1] ; de Siqueira-Silva, Diogenes Henrique [2] ; Quirino, Patricia Postingel [1] ; Ninhaus-Silveira, Alexandre [3] ; Verissimo-Silveira, Rosicleire [3]
Total Authors: 5
Affiliation:
[1] UNESP Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Biol & Zootecnia, LINEO Lab Ictiol Neotrop, Ave Brasil, Ctr 56, BR-15385000 Sao Paulo - Brazil
[2] UNIFESSPA Univ Fed Sul & Sudeste Para, IESB, Fac Ciencias Saude & Biol FACISB, Folha 31, Quadra 07, Lote Especial S-N, BR-68507590 Nova Mamba, PA - Brazil
[3] UNESP Univ Estadual Paulista, Dept Biol & Zootecnia, LINEO Lab Ictiol Neotrop, Campus Ilha Solteira, Ave Brasil, Ctr 56, BR-15385000 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Theriogenology; v. 103, p. 149-152, NOV 2017.
Web of Science Citations: 2
Abstract

This stereological analysis of the types of germ cells and the number of Sertoli cells per cyst in Astyanax altiparanae testes during spermatogenesis is the first such report in Characiformes. Testes of 25 male A. altiparanae were examined. Based on the number of spermatogonia B per cyst (469.2 +/- 9.92), we estimated that spermatogonia undergo at least nine mitotic divisions before differentiating into primary spermatocytes. There are four spermatogonia types: undifferentiated spermatogonia A{*}, undifferentiated spermatogonia, differentiated spermatogonia, and type B spermatogonia. The number of Sertoli cells increased gradually from 1.41 +/- 0.51 in the single undifferentiated spermatogonium A{*} to 9.25 +/- 0.50 in cysts of spermatocytes in the leptotene/zygotene stage, possibly related to greater complexity of cellular events during the meiotic stage. The number of germ cells rose dramatically from spermatogonia A (1.0 +/- 0) to spermatogonia B (469.2 +/- 9.92); however, the quantity of spermatocytes inside the cysts in the leptotene/zygotene stage decreased (300.6 +/- 6.97) relative to spermatogonia B, representing a loss of approximately 36% of the former number of cells. This was probably the result of apoptosis, which promotes successful development of the remaining cells during sperm production. The support capacity of Sertoli cells increased gradually during spermatogenesis. (C) 2017 Published by Elsevier Inc. (AU)

FAPESP's process: 13/24527-8 - Histological and stereological evaluation of Astyanax altiparanae (Characiformes, Characidae) spermatogenesis
Grantee:Maira da Silva Rodrigues
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 14/23379-8 - Xenogenic transplantation of spermatogonial stem cells in Characidae (Teleostei, Characiformes)
Grantee:Rosicleire Veríssimo Silveira
Support Opportunities: Regular Research Grants