Animal Reproduction (AR)
https://animal-reproduction.org/article/doi/10.1590/1984-3143-AR2025-0117
Animal Reproduction (AR)
ORIGINAL ARTICLE

Histological features of Jaculus jaculus male-reproductive system: detection of metalloproteinases in testes and seminal vesicles during the active-reproductive phase

Nesrine Zeghloul; Nemcha Lebaili-Benmoussa; Mohamed El Fadel Ousmaal; Salim Lamine; Nesrine Lina Gharnaout; Sabrina Lekmine; Nassim Moula; Walid Elfalleh; Fehmi Boufahja; Hamdi Bendif; Hichem Tahraoui; Abdeltif Amrane

http://dx.doi.org/10.1590/1984-3143-AR2025-0117 Anim Reprod, vol.23, n3, e20250117, 2026
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Abstract

Our study explored the histological and histo-functional characteristics of the testis and seminal vesicles of Jaculus jaculus, collected from the Biskra (34° 51' 0" N 5° 43' 59.999" E) and M’sila regions in Algeria (35°42'20.99" N 4°32'30.98" E) from autumn to early spring, corresponding to activity and transitional periods of the reproductive cycle. An immunohistochemical analysis of matrix metalloproteinases (MMP-2 and MMP-9) was conducted on the seminal vesicles and testes during the active reproductive. The study utilized an indirect immunohistochemistry protocol with amplification through streptavidin-biotin-peroxidase. Histologically, seminiferous tubules in Jaculus jaculus, captured during the transitional period of the reproductive cycle, multinucleated giant cells of germinal origin were observed during the transitional phase of the reproductive cycle, reflecting a process of seasonal testicular remodelling. The histological structure of seminal vesicles appears highly characteristic of the studied species, with the vesicular epithelium organized into complex acinar glands surrounded by basal lamina and connective tissue. Gland cells secrete a heterogeneous product. In the testis, cells of the seminiferous epithelium express MMP-2 and MMP-9 in their cytoplasm, with a strong expression of MMP-2; however, both proteins are absent from the extracellular matrix. During the active period, in seminal vesicles, a significant immunohistochemical signal of MMP-2 and MMP-9 was observed in epithelial cells, smooth muscle cells, with no immunoexpression in the extracellular matrix. MMP-2 and MMP-9 are expressed in a pattern consistent with a potential role in the seasonal reproductive cycle.

Keywords

desert jerboa, reproductive cycle, MMP-2, MMP-9, phagocytic activity

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Submitted date:
08/06/2025

Accepted date:
03/31/2026

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