Electrophoretic patterns of proteins of the fat bodies of normal, castrated and hypophysectomized males of Rana esculenta were studied. Castration and hypophysectomy differently influence bands “2”, “3”, “4”, “5”. Bands “4” and “5” are androgen-dependent. These variations have been discussed in relation to the reproductive phenomena.
The thumb pads of Rana esculenta regress in adult males following castration. Administration of small amounts of testosterone propionate ( total dose) in the castrates induces hypertrophy in both epidermal and glandular layers. In addition there is accumulation of PAS-positive secretion in the cytoplasm of glandular cells of treated castrates. The mechanism of action of testosterone is similar to that known for mammalian target organs; hormonal administration in castrates causes an increase in...
Electrophoretic patterns of proteins were studied in the fat bodies of males and females of Rana esculenta. The patterns, except the “o” band present only in the females, manifest quantitative differences during the reproductive season. These variations have been briefly discussed in relation to the reproductive phenomena.
In the adults of both sexes of Rana esculenta, gonadectomy provokes a reduction in the height of epidermis and the atrophy of mucous glands. Testosterone treatment restores the normal morphological aspect; estradiol- is ineffective. These observations along with the presence of only an androgen receptor in the skin of both sexes of Rana esculenta allow us to affirm that this tissue is a secondary sexual character.
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