Heat-induced lethality and chromosomal damage in synchronized Chinese hamster cells treated with 5-bromodeoxyuridine.
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Biomedical subjects
Publications and source records attributed to H H Miller.
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1. Pretreatment of female rats with (-)-emetine or (+/-)-2,3-dehydroemetine (at 18mumol/kg body wt. for 24h) prolongs the hexobarbital-induced sleeping-time of the treated animals. 2. This effect is not observed on pretreating animals with other compounds closely related to (-)-emetine, such as (-)-isoemetine or (+)-O-methylpsychotrine. 3. Liver microsomal drug-metabolizing enzyme activity in vitro as measured by N-demethylation of aminopyrine and azo-reduction of Neoprontosil is inhibited in rats pretreated with (-)-emetine or with (+/-)-2,3-dehydroemetine. 4. These inhibitory effects on drug metabolism in vitro are not observed in corresponding experiments involving pretreatment of rats with (-)-isoemetine or (+)-O-methylpsychotrine. 5. Co-administration of emetine or 2,3-dehydroemetine and sodium phenobarbital or 1,1-dichloro-2-o-chlorophenyl-2-p-chlorophenylethane to rats abolishes or greatly diminishes the stimulation of drug-metabolizing enzyme activity in vitro usually obtained by the administration of phenobarbital or 1,1-dichloro-2-o-chlorophenyl-2-p-chlorophenylethane alone. 6. Further, in rats pretreated with sodium phenobarbital and subsequently injected with emetine or 2,3-dehydroemetine the pre-stimulated drug-metabolizing enzyme activity in vitro is diminished. 7. The inhibitory effects on drug-metabolizing enzyme activity after pretreatment with (-)-emetine or (+/-)-2,3-dehydroemetine do not appear to be related to NADPH generation.
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Psychological and social adjustment was assessed in eighty-nine individuals with familial polyposis, a genetically transmitted disease placing one at high risk for colon cancer. Three illness-related concerns were identified: fear about future health due to the high risk for cancer; guilt about transmitting a genetic disease to one's children; and concern about physical disfigurement resulting from surgery. Well-being scores were generally positive, although somewhat lower than those reported in a community sample. Two factors in particular influenced well-being scores: those with higher levels of concern about disfigurement reported lower well-being, and those with accurate information about the disease reported higher well-being. Of the eighty-nine individuals included in this study, sixty-one were participating in a clinical trial and twenty-eight had been invited but declined entry. Demographic and psychosocial factors were examined for their relationship to participation. Only three of these variables, length of time since diagnosis, religious affiliation, and geographic location distinguished participants from nonparticipants.