Establishment and Optimization of an Aggregate Culture System of Testicular Cells from Marine Medaka, IOryzias dancena/I

Although testicular organoids have remarkable potential as testicular models in vitro, there have been few studies about testicular organoids in teleost fish. As a first step to establish a stable culture system for fish testicular organoids, we investigated the efficient conditions for an aggregate...

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Veröffentlicht in:Journal of marine science and engineering 2023-10, Vol.11 (11)
Hauptverfasser: Choi, Jae Hoon, Ryu, Jun Hyung, Gong, Seung Pyo
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Ryu, Jun Hyung
Gong, Seung Pyo
description Although testicular organoids have remarkable potential as testicular models in vitro, there have been few studies about testicular organoids in teleost fish. As a first step to establish a stable culture system for fish testicular organoids, we investigated the efficient conditions for an aggregate culture of dispersed testicular cells from adult marine medaka (Oryzias dancena) by evaluating the effects of culture methods and media composition on an aggregate culture. As the results, we found that culturing dispersed testicular cells in an ultra-low attachment 96 well without Matrigel was most effectively able to induce the formation of testicular cell aggregates among the five different methods tested. Subsequently, through media testing, we confirmed that the modified ESM2 was more optimal for this aggregate culture than the media conventionally used in porcine, human, and rat testicular aggregate cultures. Furthermore, we demonstrated that three supplements in the modified ESM2 including fish serum (FS), basic fibroblast growth factor (bFGF), and embryo extracts (EE) did not influence the number and size of the testicular aggregates formed, but fetal bovine serum and other supplements including β-mercaptoethanol, non-essential amino acids, sodium pyruvate, and sodium selenite were affected significantly. Nevertheless, the removal of three supplements (FS, bFGF, and EE) during culture negatively affected scp3 and sox9a expression levels, indicating their necessity. Finally, we identified that the sperms derived from in vitro cultured testicular aggregates were able to produce offspring after fertilization with naturally matured oocytes. The results from this study will provide fundamental information to develop the techniques for fish testicular organoid culture, which will eventually contribute to the development of reproductive biotechnology for aquaculture and the conservation of endangered fish species.
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As a first step to establish a stable culture system for fish testicular organoids, we investigated the efficient conditions for an aggregate culture of dispersed testicular cells from adult marine medaka (Oryzias dancena) by evaluating the effects of culture methods and media composition on an aggregate culture. As the results, we found that culturing dispersed testicular cells in an ultra-low attachment 96 well without Matrigel was most effectively able to induce the formation of testicular cell aggregates among the five different methods tested. Subsequently, through media testing, we confirmed that the modified ESM2 was more optimal for this aggregate culture than the media conventionally used in porcine, human, and rat testicular aggregate cultures. Furthermore, we demonstrated that three supplements in the modified ESM2 including fish serum (FS), basic fibroblast growth factor (bFGF), and embryo extracts (EE) did not influence the number and size of the testicular aggregates formed, but fetal bovine serum and other supplements including β-mercaptoethanol, non-essential amino acids, sodium pyruvate, and sodium selenite were affected significantly. Nevertheless, the removal of three supplements (FS, bFGF, and EE) during culture negatively affected scp3 and sox9a expression levels, indicating their necessity. Finally, we identified that the sperms derived from in vitro cultured testicular aggregates were able to produce offspring after fertilization with naturally matured oocytes. 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subjects Analysis
Embryonic development
Ethylenediaminetetraacetic acid
Fibroblast growth factors
title Establishment and Optimization of an Aggregate Culture System of Testicular Cells from Marine Medaka, IOryzias dancena/I
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