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Biomedical subjects

R Goldschmidt

Publications and source records attributed to R Goldschmidt.

33 records · Page 2Linked to original sources
PubMed1977

Induction and general properties of beta-galactosidase and beta-galactoside permease in Pseudomonas BAL-31.

The hydrolysis of o-nitrophenyl-beta-D-galactopyranoside (ONPG) by BAL-31, a marine Pseudomonas that acts as a host for bacteriophage PM2, was studied with intact cells and with cell-free extracts. A transport system for ONPG in whole cells and a beta-galactosidase activity in extracts were evident for cells grown on lactose minimal medium. It was found that the addition of isopropylthio-beta-D-galactopyranoside (IPTG) to cells growing in rich medium induced an ONPG hydrolytic activity detectable in cell extracts but cryptic in whole cells. The existence of a transport system for IPTG, which remained cryptic for ONPG, became apparent from studies of the rates of induction of beta-galactosidase as a function of cell mass at different concentrations of IPTG. The main properties of beta-galactosidase and the lactose transport system of BAL-31 were studied in terms of how they were affected by pH, temperature, or by the presence of several sugars. IPTG competitively inhibits the hydrolysis of ONPG by cell extracts. In cells pregrown on lactose, IPTG slightly inhibits the transport of ONPG. Glucose, and with less efficiency lactose, also inhibits the hydrolysis of ONPG in cell extracts. The growth of cells on lactose minimal medium was inhibited by the addition of IPTG. A mechanism for this inhibition and for the inhibition of ONPG transport by IPTG is discussed.

Carbohydrate Metabolism↗
PubMedDate not supplied

Oral health care issues in HIV disease: developing a core curriculum for primary care physicians.

BACKGROUND: Given the high occurrence of oral manifestations in patients infected with human immunodeficiency virus (HIV), the relative ease in recognizing these manifestations on physical examination, and their potential impact on the health care and quality of life in these patients, it is critical to provide adequate training for primary care physicians in this area. METHODS: Based on a review of the published literature and the consensus of a national panel of primary care physicians and dentists with clinical and research expertise in this area, a core curriculum was developed for primary care physicians regarding oral health care issues in HIV disease. RESULTS AND CONCLUSIONS: We describe the process of developing the core curriculum of knowledge, skills, and attitudes regarding oral health care issues in HIV disease. The final curriculum is in a format that allows for easy accessibility and is organized in a manner that is clinically relevant for primary care physicians.

Clinical Competence↗
PubMedDate not supplied

Seroprevalence of Kaposi's sarcoma-associated herpesvirus in healthy adults in Israel.

To determine if Kaposi's sarcoma-associated herpesvirus (KSHV) prevalence is correlated with the 9-fold difference in the incidence of classic Kaposi's sarcoma observed among Israeli Jewish populations, we conducted a cross-sectional KSHV seroprevalence survey in a population of 166 HIV-seronegative healthy subjects from the general population (26 women, 140 men). Eight individuals (4.8%) (all men) were seropositive for KSHV; differences between men and women were not statistically significant. If we consider the sensitivity and specificity of the assays, the corrected prevalence would be 6.1% (95% confidence interval 2.0-10.1). We noticed a non-statistically 5.5-fold difference between individuals above and below 40 years of age, but did not find an association with the incidence of classic KS among the Israeli Jewish sub-population, according to their origin. This suggests that KSHV is only necessary, albeit not sufficient, cause of classic Kaposi's sarcoma.

Adult↗
PubMedDate not supplied

Educating primary care providers about HIV disease: multidisciplinary interactive mechanisms.

As HIV-related prophylactic and therapeutic research findings continue to evolve, the Health Resources and Services Administration (HRSA) of the Public Health Service has created multidisciplinary mechanisms to disseminate new treatment options and educate primary care providers at rural and urban sites throughout our nation's health care system. HRSA has implemented (a) the International State-of-the-Art HIV Clinical Conference Call Series, (b) the national network of AIDS Education and Training Centers, (c) the nationwide HIV Telephone Consultation Service, and (d) the Clinical Issues Subcommittee of the HRSA AIDS Advisory Committee. These collaborative and comprehensive efforts at HIV information dissemination target physicians, nurses, physician assistants, dentists, clinical pharmacists, mental health care providers, case managers, and allied health professionals. The sites where they provide care include public health clinics; county, State and Federal correctional facilities; private practice offices; community and academic hospitals; military and Veterans Administration facilities; hemophilia centers; schools of medicine, nursing, and dentistry; departments of health; chronic care facilities; visiting nurse and home care agencies; health maintenance organizations; and Indian Health Service clinics and hospitals.

Diffusion of Innovation↗