A comprehensive protocol for conducting the Syrian hamster embryo cell transformation assay at pH 6.70

被引:41
作者
Kerckaert, GA [1 ]
Isfort, RJ [1 ]
Carr, GJ [1 ]
Aardema, MJ [1 ]
LeBoeuf, RA [1 ]
机构
[1] PROCTER & GAMBLE CO, MIAMI VALLEY LABS, HUMAN SAFETY DEPT, CORP P&RS, CINCINNATI, OH 45239 USA
关键词
Syrian hamster embryo cell; in vitro cell transformation protocol; pH; carcinogen screening;
D O I
10.1016/0027-5107(95)00198-0
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Studies from our laboratory have demonstrated several advantages of conducting the Syrian hamster embryo (SHE) cell transformation assay at pH 6.70 compared to that done historically at higher pH values (7.10-7.35). These include reduction of the influence of SHE cell isolates and fetal bovine serum lot variability on the assay, an increase in the frequency of chemically induced morphological transformation (MT) compared to controls, and an increased ease in scoring the MT phenotype. The purpose of this paper is to report a comprehensive protocol for conduct of the pH 6.70 SHE transformation assay including experimental procedures, a description of criteria for an acceptable assay and statistical procedures for establishing treatment-related effects. We have also identified several assay parameters in addition to pH which can affect transformation frequencies, particularly the critical role colony number per plate can have on transformation frequency. Control of this parameter, for which details are provided, can greatly increase the reproducibility and predictive value of the assay.
引用
收藏
页码:65 / 84
页数:20
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