흰쥐에서 발가락 발생중 방사선조사에 의한 세포자멸사의 변화
Changes of Apoptosis After X-irradiation During the Hindlimb Development in the Rat Fetus
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이온화방사선은 사지발생에 유해로운 영향을 미치는 것으로 알려져 있으나, 그 기전이 무엇인가는 아직 까지 확실하게 알려져 있지 않다. 본 실험에서는 뒷다리 발생이 개시되는 시기인 임신 10.7일에 2Gy의 방사선을 조사하고, 임신 14.7일, 15.7일 및 16.7일에 희생시켜 대조군과 실험군간의 차이를 비교하여 세포자멸사의 변화를 경시적으로 비교 관찰하여 방 사선에 의한 발가락 기형형성 기전의 일부를 알아보았다. 그 결과 방사선을 조사한 실험군이 대조군에 비해 평균 태아체중은 현저하게 감소하였으며, 기형의 발생빈도는 현저히 증가하였다. 출현한 발가락 기형은 발가락 수의 감소와 비대칭 등 형태이상으로, 임신 15.7일군에서는 오 른쪽 뒷다리 발가락과 왼쪽 뒷다리 발가락에서 동일한 수의 기형이 발생하였으나, 기형의 정도가 오른쪽이 더 심 하게 나타났고, 임신 16.7일군에서는 오른쪽 뒷다리 발가락 기형이 좀 더 많이 나타났으나 기형의 정도에는 차이가 없었다. 또한, TUNEL 면역조직화학 및 공초점 레이저 주사현미경(confocal laser scanning microscope) 관찰을 실시한 바 세포자멸사가 정상적인 발가락 형태형성에 중요하며 이것의 이상이 발가락 기형형성과 밀접한 관련이 있음을 알 수 있었다.
Abstract
Ionizing radiation exerts harmful effect during the limb development, but the exact mechanism is still largely unknown. In this study, 2 Gy of X-ray irradiated to the rat fetuses on gestation day of 13.7 when the hindlimb buds appear, and sacrificed at GD 14.7, GD 15.7 and GD 16.7, respectively. To reveal the changes of apoptotic figures between control and experimental groups, TUNEL immunohistochemistry and confocal laser scanning microscopy were carried. Mean body weight of fetuses of irradiated groups were decreased significantly compared to the control group. Numerical digit anomalies and asymmetries between right and left sides were increased significantly in the irradiated group compared to control group. Some digit anomalies were increased significantly in the right side. Radiation-induced decrement of the density of apoptotic figures on GD 14.7 was presumed to be related with foot and digit anomalies.
참고문헌 (31)
- "Mechanism controlling cellular suicide : role of Bcl-2 and caspases.", 54, pp.427~445 (1998)
- "An essential role for NF-kB in preventingTNF-α-induced cell death", 274, pp.782~783 (1996)
- "in theinterdigital tissue of the embryonic chick limb bud", pp.201~208 (1993)
- "Ionizing radiationacts on cellular membranes generate ceramide andinitiate apoptosis", pp.525~535 (1994)
- "Macrophagerecruitment during limb development and woundhealing in the embryonic and fetal mouse", 107, pp.1159~1167 (1994)
- "A basic biological phenomenonwith wide-ranging implications in tissue kinetics", 26, pp.239~257 (1972)
- "Congenital anomalies of the rat hindlimb induced by 5-fluorouracil.", 23, pp.13~37 (1996)
- "Evidencethat retinoic acid-induced apoptosis in the mouse limb budcore mesenchymal cells is gene-mediated", pp.815~825 (1993)
- "Recent Issue of apoptosis researches in animals", 7, pp.66~72 (1997)
- "Morphogenesis of the hindlimb digits and 5-FU induced apoptotic changes", 11, pp.117~129 (1998)
- "Human hsp27,Drosophila hsp27 and human aB expression-mediated increase in glutathione is essential protective activity of these proteins against TNFa induced cell death", 15, pp.2695~26706 (1996)
- "Genetic regulation of limb development in vertebrates", 29, pp.1765~1783 (1993)
- "Significance of programmed cell death in mammalianlimb and palate development", 70, pp.503~508 (1995)
- "Identification and inhibition of the ICE", CED-3 protease necessary for mammalian apoptosis, 1995, pp.376, 37~43
- "Apoptosis of transitional ameloblastsand MHC class II expression in the rat incisors", 71, pp.597~603 (1996)
- "Cleavage of CAD inhibitor in CADactivation and DNA degradation during apoptosis", 391, pp.96~99 (1998)
- "Death in embryonic system", 154, pp.604~612 (1966)
- "Channel formation by antiapoptotic protein Bcl-2", 94, pp.5113~5118 (1997)
- "Programmed cell death and its protectiverole with particular reference to apoptosis", 64, pp.569~574 (1992)
- "New vision of medical biology at the end of 20th century, apoptosis-mechanism of programmed cell death.", 31, pp.30~33 (1998)
- "Apoptosis in health and disease", 39, pp.91~94 (1995)
- "DNA fragmentationduring the PCD in the chick limb buds", pp.234~236 (1994)
- "Apoptosis", 124, pp.169~177 (1994)
- "Suppression of TNF-α-inducedapoptosis by NF-kB", 274, pp.787~789 (1996)
- "Programmed cell death is affectedin the novel mouse mutant fused toes", 120, pp.2601~2607 (1997)
- "Induction of cell-proliferation hormesis andcell-survival adaptive response in mouse hematopoieticcells by whole-body low-dose radiation", 53, pp.369~376 (2000)
- "TNF and cancer therapy-induced apoptosis ; Potentiation by inhibition of NF-kB.", 274, pp.783~787 (1996)
- "Caspase-dependent cleavage of signaling proteins during apoptisis", 273, pp.7141~7147 (1998)
- "The triumph of the embryo", pp.59~76 (1991), Oxford UniversityPress
- "Wild-type p 53 induces apoptosis of myeloidleukemic cells that is inhibited by interleukin-6", 352, pp.345~349 (1991)
- "Apoptotic cell death in themouse limb and its suppression in the hammertoe mutant", 165, pp.294~297 (1994)
