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“ Adenosine , deoxyadenosine, inosine, and deoxyinosine completely prevented the toxic action of the purinethiol , while guanosine and deoxyguanosine were only partially effective.”
“As antimetabolites and closely related molecules, azathiopurine and 6-mercaptopurine inhibit adenylic and guanylic acid production in the de novo purine synthesis pathway.”
British journal of clinical pharmacology • 1984 | View Paper
“The selective protection of the normal cells from 6-thioguanine and 6-mercaptopurine was probably the consequence of phosphoribosylpyrophosphate (PRPP) depletion, since adenosine pretreatment decreased PRPP pools by greater than 90% in the normal cells but by only 30% in the malignant hepatoma cells.”
“ Adenosine , and to a lesser extent guanosine, each at final concentration of 100μg/ml significantly reduced inhibition of sclerotia formation by SR in presence of 50μg/ml MP.”