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Biomedical subjects

J Ernst

Publications and source records attributed to J Ernst.

At least 73 records · Page 4Linked to original sources
PubMed1996

Absence of human immunodeficiency virus type 2 infection among patients in a hospital serving a New York community at high risk for infection. Centers for Disease Control and Prevention/Bronx-Lebanon Hospital Center HIV Serosurvey Team.

BACKGROUND: Although human immunodeficiency virus type 2 (HIV-2) infection among United States residents is considered rare, there are US populations at high risk. Few studies have surveyed these populations with a high likelihood of infection, that is, those with high percentages of persons from HIV-2-endemic areas and high prevalences of behaviors that would allow for transmission. STUDY DESIGN AND METHODS: Patients (n = 832) enrolled in a confidential HIV serosurvey at a hospital that serves a community with a relatively high percentage of West African immigrants, drug injectors, and persons who practice high-risk sexual activity were evaluated. Sera were tested for HIV type 1 (HIV-1) and HIV-2 by rapid enzyme immunoassays, standard enzyme immunoassays and Western blots. RESULTS: Eight of 832 patients were weakly reactive to HIV-2 on rapid assay, but none was confirmed to be infected when tested by standard immunoassay and Western blot. Five of these eight were reactive to HIV-1. CONCLUSION: Weak reactivity to HIV-2 antibody on the rapid assay is best explained by cross-reactivity with HIV-1 antibody; thus, even in this population at high risk for infection, false-positive reactions are more likely than true infections. The finding that HIV-2 is absent in this population at potentially high risk for infection corroborates the findings of other studies that HIV-2 infection is rare among US residents. These results support previous recommendations that, in settings other than blood collection facilities, HIV-2 testing should be selectively offered to persons with epidemiologic risk factors.

Acquired Immunodeficiency Syndrome↗
PubMed1996

The impact of human immunodeficiency virus infection on drug-resistant tuberculosis.

Infection with human immunodeficiency virus (HIV) has been associated with increased rates of single- and multidrug-resistant (MDR) tuberculosis in the New York City area. In order to examine the relationship of HIV infection to drug-resistant tuberculosis in other selected regions of the United States, we established a registry of cases of culture-proven tuberculosis. Data were collected from sites participating in an NIH-funded, community-based HIV clinical trials group. All cases of tuberculosis, regardless of HIV status, which occurred between January 1992 and June 1994 were recorded. Overall, 1,373 cases of tuberculosis were evaluated, including 425 from the New York City area, and 948 from seven other metropolitan areas. The overall prevalence of resistance to one or more drugs was 20.4%, and 5.6% of isolates were resistant to both isoniazid and rifampin (MDR). In the New York City area, HIV-infected patients were significantly more likely than persons not known to be HIV-infected, to have resistance to at least one drug (37% versus 19%) and MDR (19% versus 6%). In other geographic areas, overall drug resistance was 16%, and only 2.2% of isolates were MDR. In multiple logistic regression analyses, HIV infection was shown to be a risk factor for drug-resistant tuberculosis, independent of geographic location, history of prior therapy, age, and race. We concluded that HIV infection is associated with increased rates of resistance to antituberculosis drugs in both the New York City area and other geographic areas. MDR tuberculosis is occurring predominantly in the New York City area and is highly correlated with HIV infection.

Adolescent↗
PubMed1995

Concomitant open heart surgery and pulmonary resection for lung cancer.

From 1979 to 1993, 79 patients underwent pulmonary resection for lung cancer and a concomitant cardiac operation using extracorporeal circulation. There were 75 men and 4 women with a mean age of 65 years (range 52-77). Cardiac procedures consisted of coronary artery bypass grafting (CABG) in 69 patients (three redos), aortic valve replacement in 7 (2 combined with CABG), mitral valve repair in 1 (combined with CABG) and other in 2. In CABG cases the mean number of distal anastomoses was 4.0. Pulmonary resection included bilateral lobectomy in 1 patient, sleeve lobectomy in 3, pneumonectomy in 6, bilobectomy in 5, lobectomy in 60 and segmental resection in 4. Postoperatively 52 patients were stage I (65.8%), 18 stage II (22.8%) and 9 stage III a. Histology was squamous cell carcinoma in 48 patients (61%) and adenocarcinoma in 24 patients (30%). The hospital mortality was 6.3% (n = 5). Re-exploration for bleeding was necessary in seven patients. Follow-up was complete for all patients. The estimated mean survival for all patients (including hospital deaths) was 58 months. Two- and five-year survival rates were 62% and 42% with 45 and 22 patients, respectively, under surveillance. Lung cancer accounted for 64% of the late deaths. We conclude that pulmonary resection for lung cancer in patients undergoing a concomitant cardiac operation can be performed safely with low operative morbidity and mortality and good long-term survival.

Adenocarcinoma↗
PubMed1995

Refined solution structure of the oligomerization domain of the tumour suppressor p53.

The NMR solution structure of the oligomerization domain of the tumour suppressor p53 (residues 319-360) has been refined. The structure comprises a dimer of dimers, oriented in an approximately orthogonal manner. The present structure determination is based on 4,472 experimental NMR restraints which represents a three and half fold increase over our previous work in the number of NOE restraints at the tetramerization interface. A comparison with the recently solved 1.7 A resolution X-ray structure shows that the structures are very similar and that the average angular root-mean-square difference in the interhelical angles is about 1 degree. The results of recent extensive mutagenesis data and the possible effects of mutations which have been identified in human cancers are discussed in the light of the present structure.

Animals↗