Sperm antioxidant system in ocellate river stingray Potamotrygon motoro at transition from seminal vesicle to cloaca.
Fish Physiol Biochem
; 46(6): 1975-1980, 2020 Dec.
Article
em En
| MEDLINE
| ID: mdl-32676985
ABSTRACT
The importance of reactive oxygen species and the antioxidant system in sperm biology has been recognized for different bony fishes but nothing is known in this regard for chondrichthyans. For the first time for cartilaginous fishes, the enzymatic antioxidant system was shown herein to be present in both fractions of sperm (spermatozoa and seminal fluid) collected from two different places (seminal vesicle and cloaca). In internally fertilizing freshwater ocellate river stingray, Potamotrygon motoro, the activity of superoxide dismutase and glutathione peroxidase was not changed upon sperm transition from the seminal vesicle to the cloaca. The activity of catalase was significantly increased for both sperm fractions at transition from the seminal vesicle to the cloaca (1.6 times for spermatozoa and 1.9 times for seminal fluid). The role of the sperm antioxidant system for different aspects of internal fertilization is discussed. The presented results are the initiatory step in uncovering the biochemical events of internal reproduction in Chondrichthyes.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Glândulas Seminais
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Espermatozoides
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Superóxido Dismutase
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Catalase
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Cloaca
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Elasmobrânquios
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Glutationa Peroxidase
Limite:
Animals
Idioma:
En
Revista:
Fish Physiol Biochem
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
República Tcheca