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Low probability of double integration in transformation of nonpermissive cells by polyomavirus.

机译:多瘤病毒在非许可细胞转化中双重整合的可能性很小。

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摘要

The fate of polyomavirus genomes in stable transformants was examined in experiments in which rat or hamster cells were infected with mixed viral populations containing either two distinguishable wild types or a wild type plus a transformation-deficient mutant. The results demonstrate that in 90% of the cases in either situation, a single polyomavirus parental genome became integrated into the host genome. Both parents in the mixed infection were present in the same cells and both persisted in the infected cells until transformants appeared, eliminating the possibility that one virus would exclude the other in the early steps of the infection process. We believe that these results can be generalized to transformation events derived from normal single infections. Thus, contrary to previous results for the number of integration sites determined by restriction endonuclease and blot hybridization analysis, it appears that the probability for more than one integration event in transformation by polyomavirus is low (1 in 10). A reinterpretation of previous data is proposed.
机译:在实验中检查了多瘤病毒基因组在稳定转化子中的命运,在该实验中,大鼠或仓鼠细胞被含有两种可区分的野生型或野生型加上转化缺陷型突变体的混合病毒种群感染。结果表明,在任何一种情况下,在90%的病例中,单个多瘤病毒亲本基因组已整合到宿主基因组中。混合感染中的两个亲本都存在于同一细胞中,并且两者都持续存在于被感染的细胞中,直到出现转化体为止,从而消除了一种病毒在感染过程的早期阶段会排斥另一种病毒的可能性。我们认为,这些结果可以推广到源自正常单一感染的转化事件。因此,与先前通过限制性核酸内切酶和印迹杂交分析确定的整合位点数目的结果相反,看来多瘤病毒转化中一个以上整合事件的概率很低(十分之一)。建议重新解释以前的数据。

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