title: Differences in the activity of adenosine deaminase and of purine nucleoside phosphorylase and in the sensitivity to deoxypurine nucleosides between subpopulations of mouse thymocytes.
abstract: The activities of adenosine deaminase (ADA) and of purine nucleoside phosphorylase (PNP) were measured in thymocyte subpopulations separated by peanut agglutinin (PNA), in unseparated thymocytes, in lymph node and in spleen cells. The PNA+ thymocyte subpopulation exhibited the highest ADA activity of all cells studied. The lowest PNP activity was found in the PNA- subpopulation of thymocytes. PNA+ cells, moreover, exhibited a more intensive DNA synthesis than the PNA- cells, and a greater sensitivity to deoxyadenosine toxicity in the presence of erythro-9-(2-hydroxy-3-nonyl)-adenine (EHNA). The two thymocyte subpopulations exhibited a similar sensitivity to deoxyguanosine (dG) toxicity.
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives / Q000494:pharmacology; D000243:Adenosine Deaminase / Q000378:metabolism*; D000818:Animals; D004247:DNA / Q000096:biosynthesis; D003839:Deoxyadenosines / Q000494:pharmacology*; D003849:Deoxyguanosine / Q000494:pharmacology; D037102:Lectins / Q000276:immunology; D008198:Lymph Nodes / Q000166:cytology / Q000201:enzymology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009700:Nucleoside Deaminases / Q000378:metabolism*; D019887:Peanut Agglutinin; D010430:Pentosyltransferases / Q000378:metabolism*; D011683:Purine-Nucleoside Phosphorylase / Q000378:metabolism*; D013154:Spleen / Q000166:cytology / Q000201:enzymology; D013601:T-Lymphocytes / Q000145:classification* / Q000378:metabolism
chemical_list: D003839:Deoxyadenosines; D037102:Lectins; D019887:Peanut Agglutinin; C010192:9-(2-hydroxy-3-nonyl)adenine; D004247:DNA; D010430:Pentosyltransferases; D011683:Purine-Nucleoside Phosphorylase; D009700:Nucleoside Deaminases; D000243:Adenosine Deaminase; D003849:Deoxyguanosine; D000225:Adenine