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Articles 31 - 60 of 82
Full-Text Articles in Life Sciences
Production Of Interleukin 10 By Islet Cells Accelerates Immune-Mediated Destruction Of Beta Cells In Nonobese Diabetic Mice., Lise Wogensen, Myung-Shik Lee, Nora Sarvetnick
Production Of Interleukin 10 By Islet Cells Accelerates Immune-Mediated Destruction Of Beta Cells In Nonobese Diabetic Mice., Lise Wogensen, Myung-Shik Lee, Nora Sarvetnick
Journal Articles: Regenerative Medicine
The T helper type 2 (Th2) cell product interleukin 10 (IL-10) inhibits the proliferation and function of Th1 lymphocytes and macrophages (M phi). The nonobese diabetic mouse strain (NOD/Shi) develops a M phi and T cell-dependent autoimmune diabetes that closely resembles human insulin-dependent diabetes mellitus (IDDM). The objective of the present study was to explore the consequences of localized production of IL-10 on diabetes development in NOD/Shi mice. Surprisingly, local production of IL-10 accelerated the onset and increased the prevalence of diabetes, since diabetes developed at 5-10 wk of age in 92% of IL-10 positive I-A beta g7/g7, I-E- mice …
The Role Of Tocopherol, Cholesterol, And Oleic Acid In Lipid Peroxidation, Jherie Jean Demouy Blazier
The Role Of Tocopherol, Cholesterol, And Oleic Acid In Lipid Peroxidation, Jherie Jean Demouy Blazier
Honors Theses
No abstract provided.
Translational Regulation Of The C-Jun Proto-Oncogene, Anil Sehgal
Translational Regulation Of The C-Jun Proto-Oncogene, Anil Sehgal
Theses and Dissertations in Biomedical Sciences
The v-jun oncogene was originally isolated from the ASV17 virus in 1987. Ever since its isolation, extensive work has been done to understand the role of the v-jun oncogene in cell transformation. The c-Jun protein is a transcription factor which binds to the DNA target TGACTCA. The c-Jun protein binds to DNA in the form of dimers. It can form homodimers with itself and heterodimers with Jun family (JunB and JunD), Fos family (FosB, Fra1 and Fra2), or with CREB family members through the leucine zipper motif. Because the c-jun proto-oncogene plays an important role in cell transformation, extensive work …
Investigation Of Selenium Status In Hypo-, Hyper- And Euthyroid Children, Ping Sun
Investigation Of Selenium Status In Hypo-, Hyper- And Euthyroid Children, Ping Sun
Chemistry & Biochemistry Theses & Dissertations
Recently, it has been reported that human type I iodothyronine deiodinase, an enzyme important in the conversion of T4 to T3 , is a selenoenzyme. Several studies have reported alterations in plasma selenium level in hypo- and hyperthyroid patients.
Using polarized Zeeman-effect atomic absorption spectroscopy, we measured selenium, zinc, copper and manganese concentrations in the plasma and/or red blood cells in children with or without thyroid disease being seen at the outpatient clinic at Children's Hospital of the King's Daughters. Children with thyroid disease were subdivided into untreated, treated and nonresponsive groups. Data were analyzed using Student's t-test …
Protein S-Thiolation In Hepatocytes Stimulated By T-Butyl Hydroperoxide, Menadione, And Neutrophils, Yuh-Cherng Chai, S. Hendrich, James Thomas
Protein S-Thiolation In Hepatocytes Stimulated By T-Butyl Hydroperoxide, Menadione, And Neutrophils, Yuh-Cherng Chai, S. Hendrich, James Thomas
Yuh-Cherng Chai
In order to examine potentially important S-thiolated proteins, ^3^5S-labeled hepatocytes were exposed to oxidative stress. A similar group of S-thiolated proteins including carbonic anhydrase III was observed in cells treated with t-butyl hydroperoxide, menadione, or stimulated neutrophils. The radioactive thiols bound to hepatocyte proteins were identified by HPLC and more than 85% was glutathione. In menadione-treated hepatocytes, proteins were gradually S-thiolated over 30 min and 25% of the cellular glutathione pool became protein-bound. In t-butyl hydroperoxide-treated cells, S-thiolation was more transient and 11% of the glutathione was protein-bound. Neutrophil-treated hepatocytes had nearly the same amount of protein S-thiolation (8% after …
S-Thiolation Of Individual Human Neutrophil Proteins Including Actin By Stimulation Of The Respiratory Burst: Evidence Against A Role For Glutathione Disulfide, Yuh-Cherng Chai, S. Ashraf, R. Johnson, James Thomas
S-Thiolation Of Individual Human Neutrophil Proteins Including Actin By Stimulation Of The Respiratory Burst: Evidence Against A Role For Glutathione Disulfide, Yuh-Cherng Chai, S. Ashraf, R. Johnson, James Thomas
Yuh-Cherng Chai
Protein S-thiolation, a reversible modification of protein sulfhydryls resulting in formation of mixed-disulfides, was studied in human neutrophils stimulated with phorbol diester to produce superoxide anion. Rapid S-thiolation of several proteins was examined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Glutathione was identified as the primary protein-bound thiol by HPLC chromatography, contributing considerably more than 85% of the total. Minor amounts of homocysteine and/or cysteine were also detected as protein-bound thiols. During the first 30 min after stimulation, 10% of the cellular glutathione became protein bound (2 nmol/mg of protein). There was no increase in glutathione disulfide suggesting that S-thiolation of …
Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D Peabody
Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D Peabody
Biology Department Faculty Works
The coat proteins of RNA phages MS2 and GA are specific RNA-binding proteins which function to encapsidate viral RNA and to translationally repress synthesis of the viral replicase. The two proteins have highly homologous amino acid sequences, yet they show different RNA binding specificities, recognizing RNA stem-loop structures which differ primarily in the nucleotide sequences of their loops. We sought to convert MS2 coat protein to the RNA binding specificity of GA through the introduction of GA-like amino acid substitutions into the MS2 coat protein RNA-binding site. The effects of the mutations were determined by measuring the affinity of the …
Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D S. Peabody
Altering The Rna Binding Specificity Of A Translational Repressor, F Lim, Marc Spingola, D S. Peabody
Marc Spingola
Pancreatic Islet Production Of Murine Interleukin-10 Does Not Inhibit Immune-Mediated Tissue Destruction., Myung-Shik Lee, Lise Wogensen, Judith Shizuru, Michael B.A. Oldstone, Nora Sarvetnick
Pancreatic Islet Production Of Murine Interleukin-10 Does Not Inhibit Immune-Mediated Tissue Destruction., Myung-Shik Lee, Lise Wogensen, Judith Shizuru, Michael B.A. Oldstone, Nora Sarvetnick
Journal Articles: Regenerative Medicine
IL-10 inhibits macrophage-dependent antigen presentation, cytokine production, and generation of allospecific cells in vitro. These findings have lead to the widespread expectation that IL-10 may be a useful immunosuppressive agent to inhibit allograft rejection or autoimmunity in vivo. We used two experimental paradigms to study effects of murine IL-10 on in vivo immune responses. First, fetal pancreata or adult pancreatic islets from transgenic mice expressing IL-10 in pancreatic beta cells (Ins-IL-10 mice) were grafted across the MHC barrier to examine if IL-10 could inhibit allograft rejection. Second, Ins-IL-10 mice were crossed with transgenic mice expressing lymphocytic choriomeningitis virus (LCMV) antigens …
Study Of Existing Information Concerning Water Quality Within Lake Mead, Vicki Scharnhorst, Southern Nevada Water Authority
Study Of Existing Information Concerning Water Quality Within Lake Mead, Vicki Scharnhorst, Southern Nevada Water Authority
Publications (WR)
The purpose of Task 010A15M of the Southern Nevada Water Authority (SNWA) Treatment and Transmission Facility (TTF) contract is to conduct a study of existing information concerning water quality within Lake Mead and identify additional water quality studies that are needed to supplement existing data.
The objective of this task is not to discuss treatability of the raw water source; this is addressed by Task 010A18M, "Define Water Treatment Requirements." In addition, a narrative on the effect of pending Safe Drinking Water Act amendments and a determination of treated water quality goals is included in Task 010A16M, "Review Safe Drinking …
Irreversible Steps In The Ferritin Synthesis Induction Pathway.., L. Linggoess, David Mascotti, M. Bhattacharyya-Pakrasi, H. Gang, R. Thach
Irreversible Steps In The Ferritin Synthesis Induction Pathway.., L. Linggoess, David Mascotti, M. Bhattacharyya-Pakrasi, H. Gang, R. Thach
David P. Mascotti
The ability of cells to re-repress ferritin synthesis after removal of an inducing agent (iron or heme) was investigated. Re-repression was found to be a slow process, requiring approximately 4 (after iron removal) to 10 h (after heme removal) for completion. Desferrioxamine mesylate (Desferal) had only a slight effect on the rate of re-repression, whereas cycloheximide was strongly inhibitory, indicating that new protein synthesis is required for re-repression. Re-repression occurred at a slow but significant rate in the presence of both Desferal and cycloheximide. These results indicate that, in the absence of an iron chelator, the induction of ferritin synthesis …
Separate Metabolic Pathways Leading To Dna Fragmentation And Apoptotic Nuclear Chromatin Condensation, D. Sun, Shibo Jiang, Li-Mou Zheng, David M. Ojcius, John Ding-E. Young
Separate Metabolic Pathways Leading To Dna Fragmentation And Apoptotic Nuclear Chromatin Condensation, D. Sun, Shibo Jiang, Li-Mou Zheng, David M. Ojcius, John Ding-E. Young
All Dugoni School of Dentistry Faculty Articles
Apoptosis is the predominant form of cell death observed in a variety of physiological and pathological conditions such as cancer involution, insect metamorphosis, the development of the immune and nervous systems, and embryogenesis. The typical nuclear changes taking place in apoptotic cells include extensive condensation of chromatin and internucleosomal DNA fragmentation into units of 200 base pairs. However, the mechanisms responsible for both chromatin condensation and DNA fragmentation have yet to be elucidated. In this study, micrococcal nuclease and the divalent cations, Ca2+ and Mg2+, were applied to isolated nuclei in an attempt to reconstitute in vitro the digestion of …
The Endocytosis Of Iodinated Protein Substrates In Cultured Human Skin Fibroblasts, Daniel P. Wilcockson
The Endocytosis Of Iodinated Protein Substrates In Cultured Human Skin Fibroblasts, Daniel P. Wilcockson
Master's Theses
No abstract provided.
Transformation Related Defects In Vacuolar Acidification And Mannose 6-Phosphate Receptor Function: Effects On Lysosomal Targeting, Valerie Pracht
Transformation Related Defects In Vacuolar Acidification And Mannose 6-Phosphate Receptor Function: Effects On Lysosomal Targeting, Valerie Pracht
Dissertations
No abstract provided.
The Role Of Alternative Splicing In The Regulation Of Cathepsin B Expression In Human Tumors, Qiuming Gong
The Role Of Alternative Splicing In The Regulation Of Cathepsin B Expression In Human Tumors, Qiuming Gong
Dissertations
No abstract provided.
The Effect Of Acute Ethanol Exposure On The Male Rodent Reproductive Axis, Margaret Mary Halloran
The Effect Of Acute Ethanol Exposure On The Male Rodent Reproductive Axis, Margaret Mary Halloran
Dissertations
No abstract provided.
Ribosomal Protein S3: A Multifunctional Eukaryotic Dna Repair Enzyme Active On Ultraviolet And Oxidative Dna Damage, David M. Wilson
Ribosomal Protein S3: A Multifunctional Eukaryotic Dna Repair Enzyme Active On Ultraviolet And Oxidative Dna Damage, David M. Wilson
Dissertations
No abstract provided.
Properties Of A Novel Early Lymphoid Activation Gene (Elag) Isolated From A Hodgkin's-Disease Cell Line, John Scott Bennett
Properties Of A Novel Early Lymphoid Activation Gene (Elag) Isolated From A Hodgkin's-Disease Cell Line, John Scott Bennett
Dissertations
No abstract provided.
Molecular Genetic Analysis Of Terminal Steps In Bacteriochlorophyll A Biosynthesis: Characterization Of A Rhodobacter Capsulatus Strain That Synthesizes Geranylgeranoil-Esterified Bacteriochlorophyll A, David Bollivar
Scholarship
No abstract provided.
Morphometric Analysis Of Enteric Lesions In C3h/Hen Mice Inoculated With Serpulina Hyodysenteriae Serotypes 2 And 4 With Or Without Oral Streptomycin Pretreatment, Jagannatha V. Mysore, Gerald Duhamel
Morphometric Analysis Of Enteric Lesions In C3h/Hen Mice Inoculated With Serpulina Hyodysenteriae Serotypes 2 And 4 With Or Without Oral Streptomycin Pretreatment, Jagannatha V. Mysore, Gerald Duhamel
School of Veterinary and Biomedical Sciences: Faculty Publications
The segmental distribution and sequential progression and the role of the indigenous bacterial flora in the development of enteric lesions associated with Serpulina hyodysenteriae infection in laboratory mice have not been defined. We examined the distribution and sequential morphometric changes in the large intestine of mice orally inoculated with S. hyodysenteriae serotypes 2 and 4. To determine the role of colonization resistance conferred by the indigenous bacterial flora, 40 female C3H/HeN mice were administered water alone or water containing 5 mg/mL streptomycin sulfate ad libitum for seven days prior to orogastric inoculation either with S. hyodysenteriae or sterile trypticase soy …
Spiroplasma (Entomoplasmatales) Associated With Tabanidae (Diptera) And Lampyridae (Coleoptera), Jimmy Wedincamp Jr.
Spiroplasma (Entomoplasmatales) Associated With Tabanidae (Diptera) And Lampyridae (Coleoptera), Jimmy Wedincamp Jr.
Legacy ETDs
Abstract 1:
To determine the exit points of Spiroplasma from tabanids, 45 naturally infected Tabanus gladiator and 6 T. sulcifrons were restrained and fed 10% sucrose. The flies were allowed to feed for 24 hours and the resulting oral and anal specks were cultured in MID broth. Spiroplasmas were isolated from 21 of 51 oral specks but none of 23 anal specks deposited on plastic. In contrast, when anal specks were deposited in a sucrose solution, 9 of 28 anal specks in sucrose yielded spiroplasma cultures. Air-dried spiroplasma cultures in 5% sucrose survived for up to 30 days in the …
Characterization And Genetic Analysis Of A Pigmentation Mutant Of Neurospora Crassa, Craig West Banks
Characterization And Genetic Analysis Of A Pigmentation Mutant Of Neurospora Crassa, Craig West Banks
Legacy ETDs
The mutant overaccumulator of carotenoids, ovc. was obtained from the Fungal Genetics Stock Center in Kansas City, Kansas. This mutant had been isolated following UV irradiation of the colonial mutant col-4 and mapped to Linkage Group IV (R. Harding, 1984 Neurospora Newsletter 34: 23-25). Examination of ovc in our laboratory revealed that in addition to having increased pigmentation, the mutant was osmotic sensitive, failing to grow on 6% NaCl. Morphology of ovc closely resembles that of cut, another osmotic sensitive mutant in LG IV. A cross of ovc to the osmotic sensitive mutant cut failed to produce …
The Role Of Sexual Selection In Structuring West Indian Passerine Communities, C. Lynne Starling
The Role Of Sexual Selection In Structuring West Indian Passerine Communities, C. Lynne Starling
Legacy ETDs
Patterns of plumage dimorphism were examined among species of passerines native to 19 West Indian islands. Based on sexual selection theory, the predictions were made that dimorphic species: (1) occur on fewer and larger islands than monomorphic species due to reduced colonization ability and reduced survivorship imposed by sexual selection pressure, and (2) should be added to island communities disproportionately as area increases, an idea which was tested using linear models.
No significant difference was observed between number of islands or minimum island area occupied by dimorphics versus monomorphics. The traditional ANCOVA model best fits the data and suggests that …
Sequence Of A Psac Gene From The Cyanobacterium Synechococcus Sp. Pcc 6301, Patricia L. Herman, Kartika Adiwilaga, John H. Golbeck, Donald P. Weeks
Sequence Of A Psac Gene From The Cyanobacterium Synechococcus Sp. Pcc 6301, Patricia L. Herman, Kartika Adiwilaga, John H. Golbeck, Donald P. Weeks
Department of Biochemistry: Faculty Publications
The psaC gene encodes PsaC, the apoprotein for the terminal iron-sulfur clusters, FA and FB, in the PSI reaction center of cyanobacteria, algae, and higher plants. PsaC functions as a membrane-bound oxidoreductase, accepting electrons from the Fx iron-sulfur cluster located on the PsaA/PsaB heterodimer and donating them to the soluble electron transfer proteins Fd and flavodoxin (reviewed in Bryant, 1992). The objective of our work is to clarify the role of PsaC in linear and cyclic electron transfer. The experimental organism is Syneckococcus sp. PCC 6301, a unicellular, freshwater cyanobacterium that is used extensively for physiological, …
Use Of Pyocin To Select A Haemophilus Ducreyi Variant Defective In Lipooligosaccharide Biosynthesis, A A. Campagnari, R Karalus, M A. Apicella, William Melaugh, A J. Lesse, B W. Gibson
Use Of Pyocin To Select A Haemophilus Ducreyi Variant Defective In Lipooligosaccharide Biosynthesis, A A. Campagnari, R Karalus, M A. Apicella, William Melaugh, A J. Lesse, B W. Gibson
Chemistry Faculty Publications
Haemophilus ducreyi, a cause of genital ulcer disease in developing countries, appears to facilitate the heterosexual transmission of the human immunodeficiency virus in Africa. Despite an increase in studies of this gram-negative human pathogen, little is known about the pathogenesis of chancroid. Our studies have shown that the lipooligosaccharides (LOS) of H. ducreyi may play an important role in ulcer formation. Monoclonal antibody and mass spectrometric analyses identified a terminal trisaccharide present on H. ducreyi LOS that is immunochemically similar to human paragloboside. This epitope is present on the LOS of Neisseria gonorrhoeae, and it may be the site of …
Expression Of Prelamin A Confers Sensitivity Of Dna Biosynthesis To Lovastatin On F9 Teratocarcinoma Cells, Michael Sinensky, T. Mclain, K. Fantle
Expression Of Prelamin A Confers Sensitivity Of Dna Biosynthesis To Lovastatin On F9 Teratocarcinoma Cells, Michael Sinensky, T. Mclain, K. Fantle
Michael Sinensky
No abstract provided.
The Processing Pathway Of Prelamin A, Michael Sinensky, K. Fantle, M. Trujillo, T. Mclain, A. Kupfer, M. Dalton
The Processing Pathway Of Prelamin A, Michael Sinensky, K. Fantle, M. Trujillo, T. Mclain, A. Kupfer, M. Dalton
Michael Sinensky
The conversion of mammalian prelamin A to mature lamin A proceeds through the removal of 18 amino acids from the carboxyl terminus. The initial step in this processing is the isoprenylation of a CAAX box cysteine. This proteolytic event is distinctive for prelamin A among the known prenylated mammalian proteins. Since the carboxyl terminus of prelamin A is removed during maturation, it is not obvious that this protein would undergo the two reactions subsequent to prenylation observed in other CAAX box proteins-the endoproteolytic removal of the carboxyl-terminal 3 amino acids and the subsequent methylation of the now carboxyl-terminal cysteine. To …
The Processing Pathway Of Prelamin A, Michael Sinensky, K. Fantle, M. Trujillo, T. Mclain, A. Kupfer, M. Dalton
The Processing Pathway Of Prelamin A, Michael Sinensky, K. Fantle, M. Trujillo, T. Mclain, A. Kupfer, M. Dalton
Faculty Publications, Biological Sciences
The conversion of mammalian prelamin A to mature lamin A proceeds through the removal of 18 amino acids from the carboxyl terminus. The initial step in this processing is the isoprenylation of a CAAX box cysteine. This proteolytic event is distinctive for prelamin A among the known prenylated mammalian proteins. Since the carboxyl terminus of prelamin A is removed during maturation, it is not obvious that this protein would undergo the two reactions subsequent to prenylation observed in other CAAX box proteins-the endoproteolytic removal of the carboxyl-terminal 3 amino acids and the subsequent methylation of the now carboxyl-terminal cysteine. To …
Susceptibility Of Eumeces Species Skinks To A Southeastern Isolate Of The Lyme Disease Spirochete (Borrelia Burgdorferi), Gregory A. Cummins
Susceptibility Of Eumeces Species Skinks To A Southeastern Isolate Of The Lyme Disease Spirochete (Borrelia Burgdorferi), Gregory A. Cummins
Legacy ETDs
The SI-4 strain of Borrelia burgdorferi obtained from field collected Ixodes scapularis on Sapelo Island, Georgia, was infective to seven of eight cotton mice (Peromyscus gossypinus) by needle inoculation. I. scapularis larvae were then fed on them, and nymphs molting from these larvae were then fed on laboratory mice, Mus musculus, in an attempt to transmit the spirochete. One of three mice was successfully infected; confirmation of the presence of B. burgdorferi was made using BSK II culture and the polymerase chain reaction (PGR). A subsequent attempt was made to determine if SI-4 was infective for Eumeces …
Binding Of Matrix Attachment Regions To Lamin Polymers Involves Single-Stranded Regions And The Minor Groove., M. E. Eva Ludérus, Jan L. Den Blaauwen, Oncko J. De Smit, Duane A. Compton, Roel Van Driel
Binding Of Matrix Attachment Regions To Lamin Polymers Involves Single-Stranded Regions And The Minor Groove., M. E. Eva Ludérus, Jan L. Den Blaauwen, Oncko J. De Smit, Duane A. Compton, Roel Van Driel
Dartmouth Scholarship
Chromatin in eukaryotic nuclei is thought to be partitioned into functional loop domains that are generated by the binding of defined DNA sequences, named MARs (matrix attachment regions), to the nuclear matrix. We have previously identified B-type lamins as MAR-binding matrix components (M. E. E. Ludérus, A. de Graaf, E. Mattia, J. L. den Blaauwen, M. A. Grande, L. de Jong, and R. van Driel, Cell 70:949-959, 1992). Here we show that A-type lamins and the structurally related proteins desmin and NuMA also specifically bind MARs in vitro. We studied the interaction between MARs and lamin polymers in molecular detail …