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Raman tweezers provide the fingerprint of cells supporting the late stages of KSHV reactivation
(East Carolina University, 2009-08)
Kaposi's sarcoma-associated herpesvirus (KSHV) has both latent and lytic phases of replication. The molecular switch that triggers a reactivation is still unclear. Cells from S phase of cell cycle provide apt conditions ...
Role of central cannabinoid receptor GPR18 in cardiovascular regulation
(East Carolina University, 2014)
The primary goal of this study was to characterize the role of GPR18 in the rostral ventrolateral medulla (RVLM) in blood pressure (BP) regulation and elucidate the mechanisms involved in central GPR18 mediated hypotensive ...
Genetic and Structural Analysis of the Bacteroides Conjugative Transposon CTn341
(East Carolina University, 2005-04)
The genetic structure and functional organization of a Bacteroides conjugative transposon (CTn), CTn341, were determined. CTn341 was originally isolated from a tetracycline-resistant clinical isolate of Bacteroides vulgatus. ...
Genetic Organization and Iron-Responsive Regulation of the Brucella abortus 2,3-Dihydroxybenzoic Acid Biosynthesis Operon, a Cluster of Genes Required for Wild-Type Virulence in Pregnant Cattle
(East Carolina University, 2003-04)
Brucella abortus reportedly produces the monocatechol siderophore 2,3-dihydroxybenzoic acid (2,3-DHBA) in response to iron limitation. Nucleotide sequence analysis of the cloned DHBA biosynthesis locus from virulent B. ...
Exposure to Concentrated Coarse Air Pollution Particles Causes Mild Cardiopulmonary Effects in Healthy Young Adults
(East Carolina University, 2009-07)
Background: There is ample epidemiologic and toxicologic evidence that exposure to fine particulate matter (PM) air pollution [aerodynamic diameter ≤ 2.5 μm (PM2.5)], which derives primarily from combustion processes, can ...
Equitable rationing of highly specialised health care services for children: a perspective from South Africa.
(East Carolina University, 1999-06)
The principles of equality and equity, respectively in the Bill of Rights and the white paper on health, provide the moral and legalfoundations forfuture health care for children in South Africa. However, given extreme ...
DINITROBENZENES STIMULATE ELECTRON FLUX WITHIN NEURONAL NITRIC OXIDE SYNTHASE IN THE ABSENCE OF CALMODULIN
(2011)
Efficient electron transfer and conversion of L-arginine to L-citrulline and nitric oxide
(NO●) by neuronal nitric oxide synthase (nNOS) requires calmodulin (CaM) binding. The
present study focused on electron transfer ...
The unique roles of IFE-1, a germline-specific isoform of eukaryotic translation factor 4E, during gametogenesis
(East Carolina University, 2009)
Fertility and embryonic viability are measures of efficient germ cell growth and differentiation. During oogenesis, spermatogenesis and embryogenesis cells initially proliferate then differentiate into specific tissues. New proteins are required for both cell growth and differentiation, requiring qualitative and quantitative changes in protein synthesis. During late gametogenesis and early embryogenesis the expression of the appropriate proteins is a primarily due to translational control. Translational control of mRNAs is mediated in part by eukaryotic initiation factor 4E (eIF4E). eIF4E binds the methylated 5' cap of mRNA and recruits it to the ribosome. The nematode worm C.elegans expresses five isoforms of eIF4E (termed IFE-1 through 5). IFE-1 is expressed primarily in the germline and is the only isoform that associates with P granules by binding directly to PGL-1. P granules are ribonucleoprotein particles (RNPs) that contain stored mRNAs and proteins needed for oogenesis and early embryogenesis. Using a strain that lacks IFE-1, I assessed the translational efficiency of maternal mRNAs bound and not bound to P granules by polysome fractionation. Translation of pos-1, pal-1, mex-1, oma-1, ced-4 and glp-1 mRNAs was inefficient in the ife-1 strain relative to wild type worms. GAPDH (gpd-3) mRNA translation was not affected. We also observed differences in the pattern of expression of the MEX-1 protein during oogenesis. In males, secondary spermatocytes failed to complete cytokinesis at 25°C in absence of IFE-1. Males deficient of IFE-1 therefore lacked mature sperm. In addition, ife-1 spermatocytes prematurely accumulated pro-apoptotic CED-4, homolog to mammalian Apaf-1, during spermatogenesis. In ife-1 worms fertility was decreased by 80% due to decreased viability of both oocytes and spermatocytes. Our data indicate two unique roles for eIF4E (IFE-1 isoform) in late oogenesis and spermatogenesis. We suggest that IFE-1 preferentially recruits regulated mRNAs at critical times during germ cell development. ...
Purification and Partial Characterization of Relaxin and Relaxin Precursors from the Hamster Placenta
(East Carolina University, 1993-07)
Previous immunological studies have indicated that the molecular structure of hamster relaxin is
quite different from that of porcine relaxin. In the present study, hamster relaxin was purified from
placentas and ...
Tissue Salvage in the Non-reperfused Myocardium Mediated by (the absence of the circadian rhythm gene) mPer2 and (the receptor tyrosine kinase) EphrinA1
(East Carolina University, 2010)
Alterations in circadian rhythm have been associated with numerous cardiovascular pathologies. In project 1, we tested the hypothesis that functional mutation of the Per2 circadian clock gene would provide cardioprotection ...