{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T15:19:14Z","timestamp":1790435954640,"version":"4.1.0"},"reference-count":119,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T00:00:00Z","timestamp":1753401600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001807","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo","doi-asserted-by":"publisher","award":["2020\/15237-0 2021\/06742-5 2021\/03739-3 305808\/2020-6"],"award-info":[{"award-number":["2020\/15237-0 2021\/06742-5 2021\/03739-3 305808\/2020-6"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Bioeng. Biotechnol."],"abstract":"<jats:p>Decellularization represents a robust strategy for generating biologically derived scaffolds that retain the native architecture and biochemical complexity of the extracellular matrix (ECM), thereby providing a conducive microenvironment for germ cell adhesion, proliferation, and differentiation\u2014processes fundamental to the reconstitution of testicular function. While decellularized ECM (dECM) scaffolds have been extensively utilized in mammalian organoid systems for <jats:italic>in vitro<\/jats:italic> spermatogenesis and fertility-related research, the development of standardized protocols tailored to teleost models remains largely unexplored. In the present study, we established an efficient decellularization protocol for testicular tissue derived from <jats:italic>Astyanax lacustris<\/jats:italic>, employing 0.1% sodium dodecyl sulfate (SDS) in conjunction with physical agitation. The efficacy of cellular removal was confirmed by DNA quantification, histological evaluation and DAPI staining, whereas the preservation of ECM integrity was validated through immunofluorescence, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and proteomic profiling. SDS treatment effectively eliminated cellular components while preserving key ECM proteins, including Collagen I, Fibronectin, and Laminin \u03b11. Notably, critical ultrastructural features\u2014such as the basal lamina, seminiferous tubules, and the D-periodic banding pattern of collagen fibrils\u2014were retained post-decellularization. Proteomic analyses revealed enrichment of proteins associated with ECM organization, cell adhesion, and collagen biosynthesis, while proteins involved in glycolysis and metabolic pathways were downregulated. Moreover, the decellularized matrix retained a comprehensive repertoire of matrisome components, including multiple collagen subtypes (Col1, Col2, Col4, Col5, Col6, and Col7), glycoproteins (Fibronectin, Laminin), proteoglycans (Heparan sulfate), ECM-affiliated proteins (Integrins), secreted factors (Collagen- and calcium-binding EGF), and ECM regulators (Glycosaminoglycans). Collectively, these findings demonstrate that our protocol effectively preserves the structural and functional hallmarks of the testicular ECM, underscoring its potential as a biologically relevant scaffold for future applications in fish reproductive biology. Further investigations are warranted to optimize hydrogel formulations and assess their capacity to support the <jats:italic>in vitro<\/jats:italic> proliferation and differentiation of spermatogonial stem cells (SSCs).<\/jats:p>","DOI":"10.3389\/fbioe.2025.1631542","type":"journal-article","created":{"date-parts":[[2025,7,25]],"date-time":"2025-07-25T05:26:24Z","timestamp":1753421184000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["Engineering a 3D platform for testis bioengineering: generation and proteomic profiling of decellularized fish testicular scaffolds"],"prefix":"10.3389","volume":"13","author":[{"given":"Ivana Felipe","family":"Rosa","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beatriz Marques","family":"Souza","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucas Benites","family":"Doretto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maira da Silva","family":"Rodrigues","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caroline Nascimento","family":"Barquilha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matheus Naia","family":"Fioretto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luiz Marcos","family":"Frediani Portela","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Carlos","family":"Souza Vieira","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis Antonio","family":"Justulin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"de Magalh\u00e3es Padilha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changwei","family":"Shao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rafael Henrique","family":"N\u00f3brega","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2025,7,25]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"2","DOI":"10.1186\/1477-7827-13-2","article-title":"Molecular cloning and expression analysis of dmrt1 and sox9 during gonad development and male reproductive cycle in the lambari fish, Astyanax altiparanae","volume":"13","author":"Adolfi","year":"2015","journal-title":"Reprod. 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