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Organization of adeno-associated virus DNA in latently infected Detroit 6 cells.

The DNA of a human dependovirus, adeno-associated virus (AAV), integrates into the cellular genome under conditions nonpermissive for viral DNA replication. The AAV DNA can be rescued from the cellular genome by superinfection with a helper virus, e.g., adenovirus. To characterize the organization of the proviral DNA in greater detail, we isolated three proviral subfragments from a latently infected human cell line. Our findings, based on sequence analysis, restriction enzyme mapping, and genomic blots, demonstrate that the viral terminal repeats (trs) are present at or near the cellular/viral DNA junctions, but significant deletions of the tr sequences have occurred. One of the proviral clones has extensive rearrangements which apparently occurred by nonhomologous recombination. The tail-to-tail arrangement of one of the proviral clones is consistent with limited DNA replication prior to integration by a mechanism similar to that seen in a productive infection. Although there are BamH1 fragments in the cell line we have characterized, which are the right size to have come from a head-to-tail tandem repeat, critical double digests show no evidence for the presence of a head-to-tail tandem repeat of wild-type proviral DNA. Use of probes derived from the flanking cellular DNA enabled us to determine that in this cell line the viral DNA had integrated into a site composed of nonrepetitive sequences.

Base Sequence↗

Hypertension and diabetes in Detroit Hispanics.

The purpose of this study was to explore the prevalence of hypertension and diabetes alone and together in a sample of Hispanics. There were 111 participants with a mean age of 51 years. Twenty-six percent of the participants were hypertensive, a proportion well above the Healthy People 2010 target of 16%. The majority of hypertensive participants had isolated systolic hypertension, which is consistently associated with greater cardiovascular risk. Thirty-seven percent of the hypertensives were also diabetic. Diabetics were significantly more likely than non-diabetics to have stage 3 hypertension than either stage 1 or stage 2 (chi(2) [1] = 7.17, p <.01). It is important for nurses to screen Hispanic clients who are 18 years and older for high blood pressure. Early case finding will help nurses increase awareness and control of high blood pressure among Hispanics, which is crucial to avoid the enormous human and financial burdens of cardiovascular morbidity and mortality.

Adolescent↗

Ozone treatment and the depletion of detectable pharmaceuticals and atrazine herbicide in drinking water sourced from the upper Detroit River, Ontario, Canada.

The depletion and degradation of pharmacologically active compounds (PhACs) and pesticides as a function of ozonation in drinking water treatment processes is not well studied. The A.H. Weeks drinking water treatment plant (DWTP) serves the City of Windsor, Ontario Canada, and incorporates ozone treatment into the production of drinking water. This DWTP also operates a real-time, scaled down pilot plant, which has two parallel streams, conventional and ozone plus conventional treatments. In this study water samples were collected from key points in the two streams of the pilot plant system to determine the depletion and influence of seasonal changes in water processing parameters on eighteen major PhACs (and metabolites) and seven s-triazines herbicides. However, only carbamazepine (antiepileptic), caffeine (stimulant), cotinine (metabolite of nicotine) and atrazine were consistently detectable in the raw water intake (low to sub-ng/L level). Regardless of the seasonality, the flocculation-coagulation and dual media filtration steps without ozone treatment resulted in no decrease in analyte concentrations, while decreases of 66-100% (undetectable, method detection limits 0.05-1 ng/L) of the analyte concentrations were observed when ozone treatment was part of the water processing. These findings demonstrate that ozone treatment is highly effective in depleting carbamazepine, caffeine, cotinine, and atrazine, and thus is highly influential in the fate of these compounds in drinking water treatment regardless of the seasonal time frame. Currently very few Canadian DWTPs incorporate ozonation into conventional treatment, which suggests that human exposure to these compounds via drinking water consumption may be an issue in affected communities.

Atrazine↗

Particulate air pollution and daily mortality in Detroit.

Particulate air pollution has been associated with increased mortality during episodes of high pollution concentrations. The relationship at lower concentrations has been more controversial, as has the relative role of particles and sulfur dioxide. Replication has been difficult because suspended particle concentrations are usually measured only every sixth day in the U.S. This study used concurrent measurements of total suspended particulates (TSP) and airport visibility from every sixth day sampling for 10 years to fit a predictive model for TSP. Predicted daily TSP concentrations were then correlated with daily mortality counts in Poisson regression models controlling for season, weather, time trends, overdispersion, and serial correlation. A significant correlation (P less than 0.0001) was found between predicted TSP and daily mortality. This correlation was independent of sulfur dioxide, but not vice versa. The magnitude of the effect was very similar to results recently reported from Steubenville, Ohio (using actual TSP measurements), with each 100 micrograms/m3 increase in TSP resulting in a 6% increase in mortality. Graphical analysis indicated a dose-response relationship with no evidence of a threshold down to concentrations below half of the National Ambient Air Quality Standards for particulate matter.

Air Pollution↗

Effect of age and race on the survival of men with prostate cancer in the Metropolitan Detroit tricounty area, 1973 to 1987.

OBJECTIVES: Reports have demonstrated that African Americans diagnosed with prostate cancer have a poor survival compared with whites. We examined the impact of age, race, and stage of disease on survival for men diagnosed with prostate cancer. METHODS: A retrospective analysis was made of men diagnosed with prostate cancer utilizing the Surveillance, Epidemiology, and End Results Program (SEER) database. A total of 12,907 men (9339 white, 3568 black) diagnosed from January 1, 1973 through December 31, 1987 were included in the study. For each stage of disease, survival experience was examined using Kaplan-Meier and life table methods, followed by analysis using Cox's proportional hazard model. RESULTS: African-American men have a poorer survival than whites for all stages of prostate cancer when the cancer is diagnosed at younger ages. These differences in survival were not demonstrated for men diagnosed with prostate cancer after age 70. CONCLUSIONS: Age and race should be taken into account when assessing the survival of patients with prostate cancer.

Adenocarcinoma↗