Effects of gamma-rays on morphology of the thymus of the adult fish of Oryzias latipes. | Zendy

Mohammad Momdooh Helal Ghoneum | Zendy; Kenichi Ijiri | Zendy; Nobuo Egami | Zendy

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Effects of gamma-rays on morphology of the thymus of the adult fish of Oryzias latipes.

Author(s) -

Mohammad Momdooh Helal Ghoneum,

Kenichi Ijiri,

Nobuo Egami

Publication year - 1982

Publication title -

journal of radiation research

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.643

H-Index - 60

eISSN - 1349-9157

pISSN - 0449-3060

DOI - 10.1269/jrr.23.253

Subject(s) - oryzias , fish <actinopterygii> , irradiation , mitotic index , mitosis , biology , regeneration (biology) , andrology , gamma irradiation , anatomy , microbiology and biotechnology , medicine , fishery , physics , nuclear physics

Fish, Thymus/Thymocyte repopulation/ƒÁ-rays The effects of gamma-rays on the thymus in the adult fish of Oryzias latipes were studied. Fish were subjected to a single whole-body irradiation of the dose ranging from 0 to 8 kR. Through the histological sections, the quantitative treatment was performed on the changes in thymus volume and mitotic activity of thymocytes after irradiation. The thymus in the irradiated fish exhibited a sudden drop in its volume on day 1-3 post-irradiation , subsequently followed by its regeneration. The change in mitotic index of thymocytes, especially in the regeneration phase, showed a dose-dependent behavior (same level as the control for 10 and 25 R; an overshoot for 100 and 200 R; a gradual recovery for 1 and 2 kR; no mitosis for 4 and 8 kR).

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