Higher pyrimidine dimer yields in skin of normal humans with higher UVB sensitivity.

Higher pyrimidine dimer yields in skin of normal humans with higher UVB sensitivity.
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UVB 敏感性较高的正常人皮肤中嘧啶二聚体的产量较高。

DOI:
10.1111/1523-1747.ep12283768
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发表时间:
1986
期刊:
The Journal of investigative dermatology
影响因子:
--
通讯作者:
Sutherland,BM
Sutherland,BM
中科院分区:
--
文献类型:
--
作者:
Freeman,SE;Gange,RW;Matzinger,EA;Sutherland,BM

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我们测量了UVB(280-320 nm)诱导的DNA损伤的皮肤中的个人与不同的敏感性UVB照射的最小红斑剂量(MED)测量。DNA损伤易被识别DNA中嘧啶二聚体的藤黄微球菌UV核酸内切酶切割。用碱性琼脂糖凝胶电泳法定量M. 7例受UVB(0-180 mJ· cm ~ 2)照射的个体皮肤活检组织中的非放射性DNA中存在luteusUV核酸内切酶敏感位点。生产的网站相关以及MED(相关系数= 0.78)。最敏感个体(MED = 24 mJ · cm  ̄ 2)和最不敏感个体(MED = 146 mJ ·cm  ̄ 2)的剂量反应曲线斜率分别为11.5 × 10  ̄ 4和2.6 × 10  ̄ 4位点/1000碱基/mJ·cm  ̄ 2。通过对M裂解的敏感性,确定UVB诱导的DNA损伤为嘧啶二聚体。luteusUV核酸内切酶及其被大肠杆菌光复活酶光反应性
We have measured UVB (280–320 nm)-induced DNA damage in skin of individuals with different sensitivities to UVB irradiation as measured by minimal erythema dose (MED). The DNA damage was susceptible to cleavage byMicrococcus luteusUV endonuclease, which recognizes pyrimidine dimers in DNA. An alkaline agarose gel electrophoresis method was used to quantitate the number ofM. luteusUV endonuclease-sensitive sites in nonradioactive DNA from skin biopsies of 7 individuals irradiated with UVB (0–180 mJ· cm‒2). The production of sites correlated well with MED (correlation coefficient = 0.78). The slope of the dose response curve for the most UVB-sensitive individual (MED = 24 mJ · cm‒2) and for the least UVB-sensitive individual (MED = 146 mJ · cm‒2) were 11.5 × 10‒4and 2.6 × 10‒4sites per 1000 bases per mJ·cm‒2, respectively. The UVB-induced DNA damage was determined to be pyrimidine dimers by its susceptibility to cleavage byM. luteusUV endonuclease and its photoreactivability byEscherichia coliphotoreactivating enzyme.
DOI: 10.1021/bi00559a010
发表时间: 1980
期刊: Biochemistry
影响因子: 2.9
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影响因子: 2.9
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发表时间: 1983
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影响因子: 2.9
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