Teratological Effects of Gamma-Irradiation during three Gestaional Intervals in Rats | ||||
| The Egyptian Journal of Hospital Medicine | ||||
| Article 7, Volume 36, Issue 1, July 2009, Page 456-467 PDF (392.53 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejhm.2009.17528 | ||||
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| Authors | ||||
| Elham A. Al-Shaibani1; Nadia, H. Ismail2; Omaima S. Eissa3; Mohamed I. Rady3; Zaki, T. Zaki3 | ||||
| 1Department of Biology- Faculty of Science, Sana'a University | ||||
| 2Department of Zoology, Faculty of Grils, Ain Shams University | ||||
| 3Radiation Biology Dept., National Center for Radiation Research and Technology, Atomic Energy Authority and Department of Zoology, Faculty of Science, Al-Azhar University | ||||
| Abstract | ||||
| Aim of the work: The present study aimed to evaluate the teratological effects of gamma-irradiation during three intervals of gestation; pre-implantation, organogenesis and fetal periods in rats. Material and methods: Four groups of pregnant rats were used in this study; the first one (GI) served as control. The second (GII), third (GIII) and fourth (GIV) groups were subjected to whole body γ-radiation at a sub-lethal single dose level of 4 Gy at the third day, 10th day and 14th day of gestation respectively.Pregnant rats were sacrificed at the 20th day of gestation, implantation sites, resorption, embryonic death, fetal death, growth retarded fetuses, external malformations and skeletal malformation were recorded. Results: The results showed that whole body γ-irradiation caused resorption in the embryos of pregnant rats especially in those exposed during the pre-implantation period than the two other periods. The embryonic and fetal deaths were prominent in the fetuses maternally exposed to whole body γ-irradiation during the organogenesis period. The highest percentage of growth retarded fetuses was found in fetuses maternally exposed to γ-rays during the organogenesis period followed by fetuses maternally exposed to γ-irradiation during the fetal period and then fetuses maternally exposed to γ-irradiation during the pre-implantation period. The skeletal malformations as a result of γ-irradiation were mostly represented in less ossification in the skull bones, less ossification in the vertebral centra and wavy ribs. The most affected fetal skeleton was perceptive in GIII (fetuses maternally exposed to γ-irradiation during the organogenesis period) followed by GII and then GIV. | ||||
| Keywords | ||||
| γ-irradiation; pregnant rats; Teratology | ||||
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