## Abstract Uptake and binding of methylโbis(2โchloroethyl)amine hydrochloride (HN~2~) to the cells of Yoshida sarcoma during their acquisition of resistance to this drug was investigated. With the increase of resistance index, drug uptake by the cells decreased. A good parallelism was found betwee
Comparison of nitrogen-mustard-sensitive and -resistant yoshida sarcomas
โ Scribed by C. R. Ball; T. A. Connors; J. A. Double; V. Ujhazy; M. E. Whisson
- Publisher
- John Wiley and Sons
- Year
- 1966
- Tongue
- French
- Weight
- 598 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0020-7136
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โฆ Synopsis
The Yoshida sarcoma and a line derived from it showing acquired resistance to alkylating agents have been compared from a number of aspects: chromosome number, growth rate, nucleic acid, protein and free thiol content. Although the degree of resistance to the alkylating agent Melphalan has been demonstrated to be at least I00 timesgreater than in the sensitive strain, the two tumours have been very similar in all aspects so far studied. A small, and not highly signiJcant, increase in glutathione content of the solid resistant tumour has been the only diference so far demonstrated.
๐ SIMILAR VOLUMES
Mechanism of decreased transport of nitrogen mustard ( H N , ) in HN,-resistant Yorhida sarcoma cells was investigated. H N , uptake by Yoshida sarcoma cells proved to be temperature sensitive, saturable, affected by metabolic inhibitors, and also repressed competitively by choline chloride. In resi
## Abstract Sensitivity of Yoshida sarcoma lines resistant to nitrogen mustard (HN^2^) was not enhanced by pretreatment in vitro with SHโblocking agents such as 2,2โฒโdithiodiโpyridine. This fact seems to indicate that content of cellular sulfhydryl groups did not play a great role in acquisition of
## Abstract The concentration of ^3^Hโaniline mustard in two tumour lines has been measured and the level of binding of the drug to DNA followed for 48 hours after intraperitoneal injection. Although the two tumour lines differ a hundredโfold in their sensitivity to this alkylating agent, no good c