Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes)
The aim of this study was to analyze the relationship between somatolactin (SL) expressing cells and the reproductive status in a multiple spawning fish, the pejerrey Odontesthes bonariensis. Somatolactin cells were identified in adults of both sexes by immunocytochemistry using a heterologous pisci...
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todo:paper_0022104X_v293_n5_p492_Vissio2023-10-03T14:26:26Z Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) Vissio, P.G. Andreone, L. Paz, D.A. Maggese, M.C. Somoza, G.M. Strssmann, C.A. Animalia Atheriniformes Odontesthes Odontesthes bonariensis Pisces fish protein glycoprotein hypophysis hormone somatolactin protein, fish aging animal article cytology female fish gene expression hypophysis immunohistochemistry male metabolism physiology reproduction Aging Animals Female Fish Proteins Fishes Gene Expression Glycoproteins Immunohistochemistry Male Pituitary Gland Pituitary Hormones Reproduction The aim of this study was to analyze the relationship between somatolactin (SL) expressing cells and the reproductive status in a multiple spawning fish, the pejerrey Odontesthes bonariensis. Somatolactin cells were identified in adults of both sexes by immunocytochemistry using a heterologous piscine antiserum. The area of the cells that showed immunoreactivity to SL (ir-SL) was compared in specimens with different degrees of reproductive activity as inferred from histological examination of the gonads and calculation of the gonadosomatic index (GSI%). The results showed a significant difference between the area of ir-SL cells of resting/regressing (62.9 ± 2.1 μm2) and sexually active/vitellogenic (76.8 ± 2,3 μm2) females and a significant positive correlation between the ir-SL cellular area and the GSI% (P < 0.01 in both cases). In males, the correlation between the area of ir-SL cells and the GSI% was not statistically significant. However, in those animals with the highest GSI% values, the ir-SL cells appeared more numerous and showed an increase in the immunostained area when compared to individuals with lower GSI% values. The present morphological observations are in accordance with biochemical data obtained from other species and support the assumption that SL might be involved in the regulation of reproduction in fish. © 2002 Wiley-Liss, Inc. Fil:Vissio, P.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Paz, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maggese, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Somoza, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0022104X_v293_n5_p492_Vissio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Animalia Atheriniformes Odontesthes Odontesthes bonariensis Pisces fish protein glycoprotein hypophysis hormone somatolactin protein, fish aging animal article cytology female fish gene expression hypophysis immunohistochemistry male metabolism physiology reproduction Aging Animals Female Fish Proteins Fishes Gene Expression Glycoproteins Immunohistochemistry Male Pituitary Gland Pituitary Hormones Reproduction |
| spellingShingle |
Animalia Atheriniformes Odontesthes Odontesthes bonariensis Pisces fish protein glycoprotein hypophysis hormone somatolactin protein, fish aging animal article cytology female fish gene expression hypophysis immunohistochemistry male metabolism physiology reproduction Aging Animals Female Fish Proteins Fishes Gene Expression Glycoproteins Immunohistochemistry Male Pituitary Gland Pituitary Hormones Reproduction Vissio, P.G. Andreone, L. Paz, D.A. Maggese, M.C. Somoza, G.M. Strssmann, C.A. Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| topic_facet |
Animalia Atheriniformes Odontesthes Odontesthes bonariensis Pisces fish protein glycoprotein hypophysis hormone somatolactin protein, fish aging animal article cytology female fish gene expression hypophysis immunohistochemistry male metabolism physiology reproduction Aging Animals Female Fish Proteins Fishes Gene Expression Glycoproteins Immunohistochemistry Male Pituitary Gland Pituitary Hormones Reproduction |
| description |
The aim of this study was to analyze the relationship between somatolactin (SL) expressing cells and the reproductive status in a multiple spawning fish, the pejerrey Odontesthes bonariensis. Somatolactin cells were identified in adults of both sexes by immunocytochemistry using a heterologous piscine antiserum. The area of the cells that showed immunoreactivity to SL (ir-SL) was compared in specimens with different degrees of reproductive activity as inferred from histological examination of the gonads and calculation of the gonadosomatic index (GSI%). The results showed a significant difference between the area of ir-SL cells of resting/regressing (62.9 ± 2.1 μm2) and sexually active/vitellogenic (76.8 ± 2,3 μm2) females and a significant positive correlation between the ir-SL cellular area and the GSI% (P < 0.01 in both cases). In males, the correlation between the area of ir-SL cells and the GSI% was not statistically significant. However, in those animals with the highest GSI% values, the ir-SL cells appeared more numerous and showed an increase in the immunostained area when compared to individuals with lower GSI% values. The present morphological observations are in accordance with biochemical data obtained from other species and support the assumption that SL might be involved in the regulation of reproduction in fish. © 2002 Wiley-Liss, Inc. |
| format |
JOUR |
| author |
Vissio, P.G. Andreone, L. Paz, D.A. Maggese, M.C. Somoza, G.M. Strssmann, C.A. |
| author_facet |
Vissio, P.G. Andreone, L. Paz, D.A. Maggese, M.C. Somoza, G.M. Strssmann, C.A. |
| author_sort |
Vissio, P.G. |
| title |
Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| title_short |
Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| title_full |
Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| title_fullStr |
Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| title_full_unstemmed |
Relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, Odontesthes bonariensis (Atheriniformes) |
| title_sort |
relation between the reproductive status and somatolactin cell activity in the pituitary of pejerrey, odontesthes bonariensis (atheriniformes) |
| url |
http://hdl.handle.net/20.500.12110/paper_0022104X_v293_n5_p492_Vissio |
| work_keys_str_mv |
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