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Vertebrate reproductive science and technology
RESEARCH ARTICLE

Characterisation of germline progenitor cells in the testes of phylostomid bats: Artibeus jamaicensis and Sturnira lilium

Norma Moreno-Mendoza https://orcid.org/0000-0002-3508-799X A * , Iván Cabrera-Campos B , Noe Zacaula-Juárez C and Tania J. Porras-Gómez https://orcid.org/0000-0001-9971-8132 A
+ Author Affiliations
- Author Affiliations

A Department of Cell Biology and Physiology, Instituto de Investigaciones Biomédicas, UNAM, Apartado Postal 70228, Ciudad Universitaria, Ciudad de México 04510, México.

B Posgrado en Ciencias Biológicas, Centro de Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, Santa Maria Acuitlapilco, México.

C Laboratorio de Biotecnología, Instituto Nacional de Rehabilitación, Calzada México-Xochimilco No. 289, Col. Arenal de Guadalupe, Ciudad de México C.P. 14389, México.

* Correspondence to: angelica@biomedicas.unam.mx

Handling Editor: Ana Villaverde

Reproduction, Fertility and Development 36, RD23190 https://doi.org/10.1071/RD23190
Submitted: 12 October 2023  Accepted: 18 June 2024  Published online: 11 July 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

A population of sperm progenitor cells, known as Asingle spermatogonia, has been described in mammalian testes. During division cycles in spermatogenesis, some cells will form part of the Asingle spermatogonia group, while others form primary spermatocytes. Thus, during spermatogenesis, spermatogonia are the progenitor cells of spermatozoa.

Aims

In this study, we characterise the spermatogonial stem cells (SSCs) in the testicles of Artibeus jamaicensis and Sturnira lilium bats. The knowledge generated from this will contribute to the understanding of the biology of germ cells and the mechanisms of spermatogenesis in mammals, generating information on wildlife species that are important for biodiversity.

Methods

Testes were analysed by light and electron microscopy. Likewise, the expression of specific factors of stem cells (Oct4 and C-kit), germ cells (Vasa), cell proliferation (pH3 and SCP1) and testicular somatic cells (MIS, 3βHSD and Sox9) was characterised by immunofluorescence and western blot.

Key results

The histological analysis enabled the location of type Asingle, Apaired and Aaligned spermatogonia in the periphery of the seminiferous tubules adjacent to Sertoli cells. The expression of genes of stem and germ cells made it possible to corroborate the distribution of the SSCs.

Conclusions

Results indicate that type Asingle spermatogonia were not randomly distributed, since proliferative activity was detected in groups of cells adjacent to the seminiferous tubules membrane, suggesting the localisation of spermatogonial niches in a specific region of testes.

Implications

This study provides evidence for the existence of SSCs in the testis of chiropterans that contribute to the renewal of germline progenitor cells to maintain the reproduction of the organisms.

Keywords: Artibeus jamaicensis, As spermatogonia, bats, germ cells, spermatogenesis, spermatogonia, spermatogonial stem cells, Sturnira lilium, testis.

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