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Camden, DE, United States

Gibb H.,Tetra Tech Inc. | Fulcher K.,Tetra Tech Inc. | Nagarajan S.,American Registry of Pathology | McCord S.,Washington State University | And 3 more authors.
American Journal of Public Health | Year: 2013

Objectives: We examined the relationship between radiation and excess deaths from mesothelioma among deceased nuclear workers who were part of the US Transuranium and Uranium Registries. Methods: We performed univariate analysis with SAS Version 9.1 software. We conducted proportionate mortality ratio (PMR) and proportionate cancer mortality ratio (PCMR) analyses using the National Institute for Occupational Safety and Health Life Table Analysis System with the referent group being all deaths in the United States. Results: We found a PMR of 62.40 (P <.05) and a PCMR of 46.92 (P <.05) for mesothelioma. PMRs for the 4 cumulative external radiation dose quartiles were 61.83, 57.43, 74.46, and 83.31. PCMRs were 36.16, 47.07, 51.35, and 67.73. The PMR and PCMR for trachea, bronchus, and lung cancer were not significantly elevated. Conclusions: The relationship between cumulative external radiation dose and the PMR and PCMR for mesothelioma suggests that external radiation at nuclear facilities is associated with an increased risk of mesothelioma. The lack of a significantly elevated PMR and PCMR for trachea, bronchus, and lung cancer suggests that asbestos did not confound this relationship. Source

Man Y.-G.,Diagnostic and Translational Research Center | Fu S.W.,George Washington University | Liu A.J.,Beijing 301 Hospital | Stojadinovic A.,U.S. Army | And 3 more authors.
Cancer Genomics and Proteomics | Year: 2011

Our recent studies have suggested that prostate tumor invasion is triggered by autoimmunoreactions induced focal basal cell layer disruptions (FBCLD) that selectively favor monoclonal proliferation of the overlying progenitors or of a biologically more aggressive cell clone. As circulating chromogranin-A (CgA) levels are found to correlate with tumor progression and the status of hormone refractoriness, our current study attempted to assess whether CgA-positive cells would be preferentially distributed in epithelial structures with FBCLD. Paraffin-embedded specimens from 50 patients with organ-confined prostate cancer were subjected to double immunohistochemical analysis with monoclonal antibodies to basal cells and CgA. From each case, 3-5 randomly selected fields were digitally photographed and the photos were magnified 400% and the numbers of CgA-positive cells in epithelial structures with non-disrupted, focally disrupted, and lost basal cell layer were separately counted. The averaged number of cell for each category was statistically compared with the Pearson's Chi-square test. In addition, morphologically similar structures with and without CgA-positive cell clusters were microdissected from four selected cases and subjected to a comparison of differential micro-RNA expression levels. Our study revealed that, although isolated CgA-positive cells were seen in both the basal cell layer and the luminal cell population in all cases, only 8 cases (16%) harbored large clusters of CgA-positive cells that were concentrated in a given area, in which all or nearly all cells appeared to share a similar morphological and immunohistochemical profile. Microdissected epithelial structures with CgA-positive cell clusters exhibited a more than 5- and 7-fold lower expression of miR-146a and miR-146b-5p than their CgA-negative counterparts. As focal basal cell layer disruptions and the reduction or loss of miR-146a and miR-146b-5p has been documented to correlate with prostate tumor invasion and hormone refractoriness, our findings suggest that aberrant CgA expression in epithelial structures with FBCLD may represent an early sign of these events. Source

American Registry Of Pathology | Date: 2010-03-30

Methods of fixing and processing tissue and samples on a membrane by using ultrasound radiation as a part of the method are presented. Ultrasound of a frequency in the range of 0.1-50 MHz is used and the sample or tissue receives 0.1-200 W/cm

Aboukhalid R.,Mohammed V University | Sturk-Andreaggi K.,American Registry of Pathology | Sturk-Andreaggi K.,Armed Forces DNA Identification Laboratory | Bouabdellah M.,Mohammed V University | And 4 more authors.
International Journal of Legal Medicine | Year: 2013

In an effort to facilitate forensic mitochondrial DNA (mtDNA) testing in Morocco, high-quality control region sequences from 509 individuals were generated using a comprehensive processing and data review system. This large dataset of random samples from various Moroccan population groups (Arab speaking, Berber speaking, and Sahrawi speaking) exhibited a low random match probability (0.52 %) and a mean of pairwise comparisons of 13.24. The Moroccan mtDNA gene pool studied here was defined entirely by West Eurasian (58.15 %) and African haplogroups (41.85 %). © 2012 Springer-Verlag Berlin Heidelberg. Source

Al-Zahery N.,University of Pavia | Saunier J.,American Registry of Pathology | Saunier J.,U.S. Air force | Ellingson K.,American Registry of Pathology | And 6 more authors.
International Journal of Legal Medicine | Year: 2013

To evaluate the utility of mtDNA control region data for the purposes of forensic DNA testing in Iraq, a sample of 182 subjects (128 Arab Muslims, 15 Kurd Muslims, 22 Assyrian Christians and 17 Mandaean Arabs) was tested. High numbers of singleton haplotypes were observed among Arabs, Kurds and Assyrians, but fewer were found in Mandaeans. High molecular diversity and low random match probabilities confirmed the value of control region data in the investigation of maternal genetic lineages among the Iraqi population. © 2012 Springer-Verlag. Source

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