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Further Observations on the Relationships between the SCO and the Adrenal Gland of Lacerta s. sicula Raf.: Effects of Oestrogen Administration during Summer1

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In order to verify the relationships between the SCO and the adrenal, specimens of Lacerta s. sicula were treated with oestrogens during summer, when the adrenal is very active and the SCO cells are filled with secretory material. After oestrogen treatment the interrenal cells appear reduced in size and large blood vessels appear between the interrenal cords. The SCO cells during the first period of treatment show a clear decrease in the amount of secretory material; subsequent treatment restores the levels of secretory material in the SCO cells cytoplasm, which shows an appearance identical to that exhibited by the control specimens of the same period. The results of these experiments point out that adrenal steroidogenic tissue is affected by the action of oestrogen, whose administration causes inactivation of the interrenal tissue with consequences on the SCO activity confirming the existence of a relationship between adrenal gland, interstitial tissue of the testis and SCO, already pointed out by preceding studies carried out in our laboratory.

Affiliations: 1: Istituto di Istologia ed Embriologia, Università di Napoli Via Mezzocannone 8, Napoli, Italia


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