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Action of the metalloproteinases (MMPs) and steroid hormones in the gonadal remodeling during the sex inversion in the juvenile and sequential hermaphroditism in Teleostei fish


Teleostei exhibit great plasticity in the sexual expression and among species from different orders the hermaphroditism condition is frequent. During the sex inversion, occurs gonadal tissue degeneration from the first which is substituted by of the germinal tissue from the opposite sex. Besides the changes from the germinal tissue significant changes also occur in the interstitial compartment. These changes in gonadal tissue involve an extensive remodeling of the interstitial tissue. It is known that the metalloproteinases (MMPs) exercise important role in the modulation of the extracellular matrix. Therefore, the MMPs can be also involved in the interstitial remodeling during the sex inversion in Teleostei. Due to the lack of information on the action of the MMPs in the gonadal remodeling in fish, and considering the present study aims to evaluate the action of MMPs in tissue remodeling and her action in the morphological and physiological changes of the gonads, during sex inversion in three species from Teleostei, which present juvenile (Danio rerio and Amphiprion ocellaris) and sequential hermaphroditism (Synbranchus marmoratus and Amphiprion ocellaris), respectively. In addition, the proposal intend to establish a comparative analysis on the behavior of the telocytes - a recently identified interstitial cells, not described for Teleostei yet - during the sexual inversion in these three types of hermaphrodite fish, and evaluate the role of steroid hormones in the same period. Thus, it is expected to generate new knowledge that might be used in the sexual manipulation of fish for commercial production. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MAZZONI, TALITA SARAH; QUAGIO-GRASSIOTTO, IRANI. Presence of the matrix metalloproteinases during the migration of the primordial germ cells in zebrafish gonadal ridge. Cell and Tissue Research, v. 383, n. 2, p. 707-722, FEB 2021. Web of Science Citations: 1.
MAZZONI, TALITA SARAH; VIADANNA, RENAN RIBEIRO; QUAGIO-GRASSIOTTO, IRANI. Presence, localization and morphology of TELOCYTES in developmental gonads of fishes. Journal of Morphology, v. 280, n. 5, p. 654-665, MAY 2019. Web of Science Citations: 0.
MAZZONI, TALITA SARAH; LO NOSTRO, FABIANA LAURA; ANTONELI, FERNANDA NATALIA; QUAGIO-GRASSIOTTO, IRANI. Action of the Metalloproteinases in Gonadal Remodeling during Sex Reversal in the Sequential Hermaphroditism of the Teleostei Fish Synbranchus marmoratus (Synbranchiformes: Synbranchidae). CELLS, v. 7, n. 5 MAY 2018. Web of Science Citations: 4.

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