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Articles 31 - 60 of 117
Full-Text Articles in Medicine and Health Sciences
Sexual Risk Behavior Among African-American Adolescents: Trajectories And Their Predictors, Maureen Muchimba
Sexual Risk Behavior Among African-American Adolescents: Trajectories And Their Predictors, Maureen Muchimba
All ETDs from UAB
Although adolescents in the United States are at high risk of sexually transmitted infections and HIV, research indicates that many do not use condoms consistently and have high numbers of lifetime multiple sexual partners. Among adolescents, different subgroups exhibit distinct patterns of sexual behavior over time. The purpose of this dissertation was to identify trajectories of sexual risk behavior among adolescents and to determine individual, family and community factors that are predictive of membership to trajectory groups. Data were collected on sexual risk behavior among low-income African-American adolescents in Mobile County, Alabama. Gender-balanced subsamples of risky sex (N = 1294) …
Occupational Stress, Job Satisfaction And Job Performance Among Hospital Nurses In Kampala Uganda, Rose Chalo Nabirye
Occupational Stress, Job Satisfaction And Job Performance Among Hospital Nurses In Kampala Uganda, Rose Chalo Nabirye
All ETDs from UAB
ABSTRACT Occupational stress, a common occurrence among various professions worldwide, is regarded as a major occupational health problem for healthcare professionals especially nurses. Occupational stress has been reported to affect job satisfaction and job performance among nurses, thus compromising nursing care and placing patients' lives at risk. Stress is a complex phenomenon resulting from the interaction between individuals and the environment. Therefore, significant differences in occupational stress, job satisfaction and job performance among nurses may exist due to different work settings. The aims of the study were to: 1) examine the relationships between occupational stress, job satisfaction and job performance …
Host Preference Profile In An Area Of Eastern Equine Encephalitis (Eee) Virus Transmission In Alabama, Ana Lucia Oliveira
Host Preference Profile In An Area Of Eastern Equine Encephalitis (Eee) Virus Transmission In Alabama, Ana Lucia Oliveira
All ETDs from UAB
Eastern Equine Encephalitis virus (EEEV) circulates in a mosquito-avian cycle (enzootic) within well-characterized environments. However, outbreaks in birds, horses and humans can occur (epizootic/epidemic transmission). EEEV is present throughout the Americas and the Caribbean, although some geographical differences in the ecology and epidemiology of the virus exist. The North American type of EEEV is associated with severe disease in both humans and horses, and is transmitted by the enzootic vector Culiseta melanura among birds in northern North America. The South American EEEV strain in horses can present similarly to the North American type, however, in humans, infection is rare and …
Poxvirus Evolution: The Role Of Horizontal Gene Transfer, Mary Rebecca Odom
Poxvirus Evolution: The Role Of Horizontal Gene Transfer, Mary Rebecca Odom
All ETDs from UAB
We have investigated the set of all poxvirus proteins for information about the origins of protein coding genes of the Poxviridae family of viruses. A global assessment of all poxvirus proteins for levels of similarity to proteins of other organisms, including eukaryotes, viruses, and prokaryotes, has suggested trends and relationships informative about poxvirus evolution and poxvirus interactions with hosts. Our research has focused on the poxvirus proteins subset this assessment identified as likely to have evolutionary histories involving horizontal gene transfer (HGT). We have used phylogenetic reconstructions to individually determine the sources of more than 70 horizontally transferred genes present …
A Nucleolar Specificity Factor For E2f1 Induced Cell Death, Jason Chang Paik
A Nucleolar Specificity Factor For E2f1 Induced Cell Death, Jason Chang Paik
All ETDs from UAB
The E2F family of transcription factors are important regulators of cell proliferation, and are often dysregulated in cancers. One member of the E2F family, E2F1, also has the ability to induce apoptosis; therefore, uncovering how E2F1-induced apoptosis is controlled is of interest in understanding tumorigenesis. To this end, we identified RRP1B as a novel target specifically induced by E2F1. RRP1B expression is specifically upregulated by E2F1 overexpression, but not other E2F family members. RRP1B expression is correlated with E2F1 expression during the cell cycle, and is significantly induced after DNA damage. The minimal RRP1B promoter region responsive to E2F1 was …
The Impact Of Ehr Systems On Physician Productivity And Performance, Anantachai Panjamapirom
The Impact Of Ehr Systems On Physician Productivity And Performance, Anantachai Panjamapirom
All ETDs from UAB
This study examines the relationship between electronic health record (EHR) adoption and physicians' operational productivity and financial performance. The resource-based view of the firm (RBV) was utilized as a theoretical framework to develop and address four hypotheses. Specifically, the first two hypotheses address the impact of EHR adoption status (i.e., electronic- vs. paper-based medical records), and the other two hypotheses focus on the length of EHR adoption (i.e., years of EHR adoption). This cross- sectional study used secondary data from the 2008 physician compensation and production survey conducted by the Medical Group Management Association (MGMA). Multiple linear regression analysis was …
Pneumococcal Vaccine Response And Aging In Human, Saeyoung Park
Pneumococcal Vaccine Response And Aging In Human, Saeyoung Park
All ETDs from UAB
Streptococcus pneumoniae is a major human pathogen, especially for young children and older adults. To protect from pneumococcal diseases, 23-valent pneumococcal polysaccharide vaccine (PPV23) has been used clinically since 1983. However, PPV23 is not so effective among old adults with its protective efficacy diminishing with age. We confirmed that young and old adults, who were immunized with PPV23, have comparable pneumococcal polysaccharide (PS) specific IgG levels. Interestingly, we found that old adults had lower IgA and IgM antibody levels than young adults for three serotypes (serotype 14, 18C and 23F). Consistent with the previous results, opsonic capacities of immune sera …
Regulation Of Vascular Smooth Muscle Cell Signaling And Metabolism By Platelet-Derived Growth Factor, Jessica Perez
Regulation Of Vascular Smooth Muscle Cell Signaling And Metabolism By Platelet-Derived Growth Factor, Jessica Perez
All ETDs from UAB
Growth factors are important inducers of vascular cell growth whose regulation is altered during the pathogenesis of atherosclerosis. An increase in growth factor and cytokine production, as well as lipid oxidation is observed in cardiovascular disease (CVD) and contributes to altered vascular cell signaling, exacerbated atherosclerotic lesions and heart failure. A change in cellular bioenergetic status due to mitochondrial dysfunction or damage has also been noted in CVD. In this thesis, we first examine cell signaling pathways in vascular smooth muscle cells (VSMC) which are activated in response to platelet-derived growth factor (PDGF) and regulate the cell cycle protein changes …
Molecular Mechanisms Of Breast Cancer Metastasis: Gap Junction Intercellular Communication And The Bone Microenvironment, Thomas Morgan Bodenstine
Molecular Mechanisms Of Breast Cancer Metastasis: Gap Junction Intercellular Communication And The Bone Microenvironment, Thomas Morgan Bodenstine
All ETDs from UAB
Metastatic disease accounts for the overwhelming majority of cancer related deaths. More specifically, breast cancer remains one of the leading causes of death in women and breast cancer cells metastasize to bone more than any other secondary site. Upon arriving within the bone microenvironment, breast cancer cells interact with bone marrow cells, leading to changes in bone biology that favor growth of the cancer cells. Additionally, some cancer cells are capable of direct cellular communication with cells at metastatic sites via dysregulation of a family of proteins known as connexins. This direct, physical communication is known as gap junctional intercellular …
Role Of Heme Oxygenase-1 In Acute Kidney Injury, Subhashini Bolisetty
Role Of Heme Oxygenase-1 In Acute Kidney Injury, Subhashini Bolisetty
All ETDs from UAB
Acute kidney injury (AKI), defined as the rapid loss of kidney function, is often seen in the setting of multiple organ failure in critically ill patients. Lack of established therapeutic approaches to overcome AKI has lead to unacceptably high incidence of morbidity and mortality in these patients. The molecular mechanisms that lead to AKI often have oxidative stress as a common pathogenic event. The kidney responds by prompt induction of its own anti-oxidant machinery including the highly inducible, anti-inflammatory and anti-apoptotic gene-heme oxygenase-1 (HO-1). This microsomal enzyme degrades pro-oxidant heme, which is released from heme proteins. The cytoprotective properties of …
Role Of Transient Receptor Potential Canonical Channels In Glioma Cell Biology, Valerie Christine Bomben
Role Of Transient Receptor Potential Canonical Channels In Glioma Cell Biology, Valerie Christine Bomben
All ETDs from UAB
ROLE OF TRANSIENT RECEPTOR POTENTIAL CANONICAL CHANNELS IN GLIOMA CELL BIOLOGY VALERIE C. BOMBEN DEPARTMENT OF NEUROBIOLOGY ABSTRACT Gliomas, primary brain tumors derived from glial cells, constitute the majority of malignant tumors within the central nervous system. The most malignant of these tumors, grade IV Glioblastoma multiforme, are characterized by extensive proliferation, cellular and nuclear atypia, angiogenesis, areas of necrosis, and widespread invasion into the brain parenchyma. Data from our lab and others have implicated ion channels in the invasion and proliferation of glioma cells. Moreover, calcium signaling in gliomas and other cells has been implicated in both migration and …
Analyzing Dna Topology And Transcription In Salmonella Enterica Serovar Typhimurium During Dichotomous Growth, Betty M. Booker
Analyzing Dna Topology And Transcription In Salmonella Enterica Serovar Typhimurium During Dichotomous Growth, Betty M. Booker
All ETDs from UAB
The bacterial chromosome is dynamic. The principle goal of my research is to understand how DNA topology is altered by transcription in Salmonella enterica serovar Typhimurium LT2. Gamma delta-resolution requires two direct repeat Res sites to pair a plectonemic synapse. Previous work from our lab showed that the zones of high transcription inhibited gamma delta-resolution. Using phage λ recombineering methods, we have developed Salmonella strains to study ribosomal RNA operons, which are the most highly transcribed genes in bacteria. We propose a molecular model for how supercoiling generated by high levels of transcription modifies chromosome structure.
Evolution Of Pneumococcal Serogroup 6, Preston Eugene Bratcher
Evolution Of Pneumococcal Serogroup 6, Preston Eugene Bratcher
All ETDs from UAB
Serogroup 6 of Streptococcus pneumoniae has been known to contain three serotypes, named 6A, 6B and 6C, with highly homologous capsule gene loci. The 6A and 6B capsule gene loci consistently differ from each other by only one nucleotide in the wciP gene. The 6A capsule gene locus has a galactosyltransferase (wciNα), which has been replaced with a glucosyltransferase (wciNß) in the 6C capsule gene locus. We considered that a new serotype, 6D, would be possible if the glucosyltransferase found in 6C strains was combined with the wciP gene from a 6B strain. We demonstrate that this gene combination yields …
Regulation Of Apoptosis By Smac, Iaps , And The Ubiquitin Proteasome System, Stephen Peter Burke
Regulation Of Apoptosis By Smac, Iaps , And The Ubiquitin Proteasome System, Stephen Peter Burke
All ETDs from UAB
Apoptosis, or programmed cell death, is essential for the development and maintenance of mammalian tissues. Activation of cysteinyl aspartate specific proteases, called caspases, is crucial to the implementation apoptosis. During apoptosis, the second mito-chondrial derived activator of caspase (Smac), augments caspase activity by antagonizing the inhibitor of apoptosis proteins (IAPs) down-regulation of caspase function. Smac protein synthesis occurs in the cytosol from a nuclear gene. Mitochondrial import of Smac leads to proteolytic removal of the first 55 amino acids, exposing a novel amino-terminus composed Ala56-Val-Pro-Ile59, which is an inhibitor of apoptosis binding motif (IBM). The IBM facilitates the interactions with …
Maternal Gestational Glucose Concentration And Offspring Body Composition, Insulin Sensitivity, And Ss-Cell Function, Nikki C. Bush
Maternal Gestational Glucose Concentration And Offspring Body Composition, Insulin Sensitivity, And Ss-Cell Function, Nikki C. Bush
All ETDs from UAB
Background: Evidence suggests that intrauterine exposure to elevated glucose concentrations may be a mediating factor in prenatal programming of offspring disease risk. However, studies examining the effects of maternal glucose concentration on measures of body composition, insulin sensitivity, and ß-cell response in prepubertal children are limited. Therefore, the objective of this study was to determine the associations of maternal glucose concentration with children's fat mass, insulin sensitivity, and ß-cell response using robust and physiologic measures. Methods: Participants were 40 children aged 5-10 years. Children's insulin sensitivity index (SI) and measures of basal, static, dynamic, and total ß-cell response were determined …
Hpv Dna Partitioning During Mitosis As Followed By Fluorescence Microscopy, Robert J. Carter
Hpv Dna Partitioning During Mitosis As Followed By Fluorescence Microscopy, Robert J. Carter
All ETDs from UAB
Human papillomaviruses (HPVs) are small, double-stranded deoxyribonucleic acid (DNA) tumor viruses capable of establishing persistent infections in the epithelia. After infecting actively-dividing basal cells, the papillomavirus (PV) genome is main-tained as extrachromosomal nuclear plasmids. It is largely unknown how the viral ge-nome is maintained in actively-dividing cells. Our lab demonstrated that several HPV genotypes appear to employ a distinct strategy to facilitate partitioning of HPV DNA into daughter cells during mitosis. Association of the HPV-11 origin of replication (ori)-binding protein E2 with the mitotic apparatus via cellular adapter proteins is thought to mediate equal partitioning of HPV genomes into daughter …
The Influence Of Self-Concept, Physical Activity, And Sedentary Screen Time Activities On Blood Pressure In 11-13 Year Old Middle School Children, Elizabeth Di Benedetto Gulledge
The Influence Of Self-Concept, Physical Activity, And Sedentary Screen Time Activities On Blood Pressure In 11-13 Year Old Middle School Children, Elizabeth Di Benedetto Gulledge
All ETDs from UAB
The aims of this study were to: 1) examine associations between self-concept (SC), physical activity (PA), sedentary screen time (SST), and blood pressure (BP) and 2) determine the amount of variance explained by SC, PA, and SST in BP. The increase in SST along with decreases in PA may contribute to increases in BP. SC, PA and SST have been associated with BP in adolescents but less is known about middle school children. A sample of 116 (36 males; 80 females; 51 African American, 65 White) 6th and 7th grade11-13 year old students were recruited in a southeastern state. Participants …
Information Technology And Quality Of Care In Pediatric Hospitals, Gouri Gupte
Information Technology And Quality Of Care In Pediatric Hospitals, Gouri Gupte
All ETDs from UAB
The purpose of this dissertation is to examine the relationship between the adoption of information technology by pediatric hospitals and performance on several quality of care measures. This research is aimed at addressing a gap in literature by utilizing a relatively large sample size that examines health information technology adoption across institutions and utilizes validated quality indicators from Agency for Healthcare Research and Quality. The Donabedian evaluation model that encompasses "structure, process, and outcomes" provides the conceptual framework for the organization of this research, selection of variables, and analysis. Three secondary datasets were used, 2005 Information Technology Survey of the …
A Dual Protease Inhibitor/Receptor Antagonist With Therapeutic Implications For Chronic Inflammatory Lung Diseases, Matthew Thomas Hardison
A Dual Protease Inhibitor/Receptor Antagonist With Therapeutic Implications For Chronic Inflammatory Lung Diseases, Matthew Thomas Hardison
All ETDs from UAB
Chronic neutrophilic inflammation is a hallmark of numerous pulmonary diseases. It is commonly associated with declining lung function, collagen turnover, and increased protease activity. Our laboratory has recently published several articles describing a biologically active collagen breakdown product, proline-glycine-proline (PGP) and its more active amino-terminus acetylated form, N-α-PGP. PGP acts via classical chemokine receptors CXCR1 and 2 to draw neutrophils (PMNs) into sites of inflammation in what is potentially a feed-forward mechanism of disease. The tri-peptide appears to be a bio-marker in certain clinical diseases like cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD). The present work first details …
Investigation Of Residues Of The Vesicular Stomatitis Virus Nucleocapsid Protein That Affect Transcription And Rna Replication, Djamila Harouaka
Investigation Of Residues Of The Vesicular Stomatitis Virus Nucleocapsid Protein That Affect Transcription And Rna Replication, Djamila Harouaka
All ETDs from UAB
The template for transcription and RNA replication for vesicular stomatitis virus (VSV) and other negative-strand RNA viruses is a ribonucleoprotein (RNP) complex consisting of the viral RNA genome and associated nucleocapsid (N) protein. The structure of the RNP-like complex of VSV showed that the RNA is sequestered between two lobes of the N protein, and adjacent N monomers are linked by an extensive network of interactions. Long-range interactions mediated by the N-terminal arm and C-terminal loop of the N protein stabilize the side-to-side contacts between adjacent N monomers, and are required for RNA encapsidation. It is unclear how the polymerase …
O-Glcnac Transferase Modulates Jnk1 And Foxo4 Transcription Factor To Resist Acute Oxidative Stress, Shiuh-Rong Ho
O-Glcnac Transferase Modulates Jnk1 And Foxo4 Transcription Factor To Resist Acute Oxidative Stress, Shiuh-Rong Ho
All ETDs from UAB
O-GlcNAcylation is an abundant and dynamic post-translational modification on serine and threonine residues of nuclear and cytoplasmic proteins. O-GlcNAc Transferase (OGT) and Nuclear Cytoplasmic O-GlcNAcase and Acetyltransferase (NCOAT) are the only two enzymes and major regulators in this process. In the past two decades, many studies have demonstrated its important modulation roles in nutrient sensing, protein turnover, cell cycle progression, transcription, translation as well as stress resistance. Among these biological functions, the understanding of O-GlcNAcylation dependent oxidative stress is relatively unknown. This study aims to examine the effects of O-GlcNAcylation on JNK1 and FOXO4 transcription factors under acute oxidative stress …
Identification And Characterization Of Downstream Target Genes Of The Bmp Signaling Pathway, Nam Chul Kim
Identification And Characterization Of Downstream Target Genes Of The Bmp Signaling Pathway, Nam Chul Kim
All ETDs from UAB
During nervous system development, neurons proliferate, differentiate, project their axons to their targets and make synapses with them. At the neuromuscular junction of Drosophila, these functional synapses enlarge as the body grows to maintain physiologically effective synaptic transmission with the muscles. Drosophila Bone Morphogenetic Protein (BMP) type II receptor, Wishful thinking (Wit), is important in this proper synaptic growth and function. To identify transcriptional targets of Wit signaling, we performed microarray experiments comparing normal controls to wit mutants. Through this study, we found that some of the verified target genes showed isoform-specific regulation in wit mutants, and that several neuropeptide …
Chronic Alcohol Consumption Promotes Opening Of The Mitochondrial Permeability Transition Pore And Increases Mitochondrial Injury In Liver, Adrienne Lester King
Chronic Alcohol Consumption Promotes Opening Of The Mitochondrial Permeability Transition Pore And Increases Mitochondrial Injury In Liver, Adrienne Lester King
All ETDs from UAB
Alcoholic liver disease is a serious public health concern. In particular, the mitochondrion is a specific target of ethanol toxicity and much of the damage can be related to unregulated Ca2+ homeostasis and oxidative stress which are key players in the induction of the mitochondrial permeability transition pore (MPTP) within the organelle. The mechanism behind the induction of the MPTP remains elusive. Therefore, this body of work will provide insight on what effects chronic alcohol consumption has on mitochondrial dysfunction with an emphasis on the MPTP. Chapter 2: Assessment of mitochondrial dysfunction arising from treatment with hepatotoxicants provides a description …
The Role Of The Intracellular Signaling Pathway In Ehrlichia Canis Infection In Vitro, Chang-Hyun Kim
The Role Of The Intracellular Signaling Pathway In Ehrlichia Canis Infection In Vitro, Chang-Hyun Kim
All ETDs from UAB
Ehrlichia canis is a pleomorphic obligatory intracellular gram-negative bacterium that causes tick-borne canine ehrlichiosis. A systematic investigation on the pathogenesis of the disease has been hindered largely by lack of a reliable quantitative assay. Using quantitative real time PCR (qPCR), a quantitative assay for E. canis was developed and validated. Using the qPCR, the intracellular proliferation kinetics of E. canis in the canine 030F cell-line was studied for the first time. Many intracellular bacterial pathogens have been shown to use Ca2+ signaling in the host cells to induce their own internalization and proliferation. However, it is not clear how Ca2+ …
The Effects Of Paternal Absence On The Sexual Behaviors Of African-American Adolescents Living In Impoverished Neighborhoods, Cheri Nicolette Langley
The Effects Of Paternal Absence On The Sexual Behaviors Of African-American Adolescents Living In Impoverished Neighborhoods, Cheri Nicolette Langley
All ETDs from UAB
According to the 2005 Youth Risk Behavior Survey (YRBS), 47% of the surveyed high school students reported ever having sexual intercourse, with 6% reporting having initiated their first sexual intercourse before the age of 13 (Eaton et al., 2006). Using the Mobile Youth Survey (1998-2008), the purpose of this study is four-fold: (a) to describe the MYS sample (1998-2008) in terms of its primary independent variable (the absence of a father figure) and its primary outcomes (sexual debut, sexual frequency, number of sex partners, condom use, pregnancy in the last year, and pregnancy intention); (b) to determine the impact of …
Effect Of Overexpressing Apolipoprotein A-I In An Animal Model Of Alzheimer's Disease, Terry L. Lewis
Effect Of Overexpressing Apolipoprotein A-I In An Animal Model Of Alzheimer's Disease, Terry L. Lewis
All ETDs from UAB
Apolipoprotein A-I (apoA-I) is the major protein component of high density lipoprotein (HDL) in circulation and is expressed mainly by the liver and intestine. The levels of apoA-I/HDL are inversely related to the incidence of cardiovascular disease. Because of the connections between heart disease and Alzheimer's disease (AD), it is conceivable that high levels of apoA-I/HDL may be protective against AD. However, the limited literature shows mixed results on the role of apoA-I/HDL in the development of AD. It is hypothesized that increased expression of human apoA-I will ameliorate the behavioral deficits and characteristic amyloid-ß (Aß) plaque formation in a …
A Pilot Study For A Computer-Tailored Program To Increase Calcium And Vitamin D Consumption In Young Women: Does Adding Quantitative Ultrasound Change Outcomes?, Donald Henry Lein Jr
A Pilot Study For A Computer-Tailored Program To Increase Calcium And Vitamin D Consumption In Young Women: Does Adding Quantitative Ultrasound Change Outcomes?, Donald Henry Lein Jr
All ETDs from UAB
Osteoporosis and osteoporosis-related fractures are costly personal and national problems. No cure exists so experts stress early practice of bone protective behaviors, like adequate calcium and vitamin D intake, to prevent osteoporosis and osteoporosis-related fractures. However, young women in the United States do not consume adequate amounts of these two nutrients. Further evaluation to identify cost effective programs to increase calcium and vitamin D consumption in young women is needed. The purpose of this study was to evaluate whether quantitative ultrasound (QUS) with bone strength feedback to a computer-tailored feedback and counseling intervention was needed to increase calcium and vitamin …
Functional Determinants Of The Porin Mspa And Its Role In Permeabilizing Mycobacterial Outer Membranes, Jason Huff
Functional Determinants Of The Porin Mspa And Its Role In Permeabilizing Mycobacterial Outer Membranes, Jason Huff
All ETDs from UAB
Mycobacterium tuberculosis (Mtb) infects one third of the global population and causes approximately 2,000,000 Tuberculosis-related deaths annually. Mycobacteria are Gram positive organisms but contain a unique outer membrane (OM) which is functionally similar but structurally different from those of Gram negative bacteria. The mycobacterial OM presents an efficient permeability barrier towards hydrophilic solutes. Slow permeation kinetics of hydrophilic molecules through membranes and several discoveries of cell wall channel-forming proteins indicate that mycobacterial OMs are functionalized by proteins. MspA is the primary porin of M. smegmatis and mediates diffusion of small, hydrophilic nutrients and antibiotics across the OM. Unlike porins of …
Role Of The Human Cytomegalovirus Tegument Protein Pp150 In The Trafficking And Assembly Of Infectious Virions, Sabarish Vellatheri Indran
Role Of The Human Cytomegalovirus Tegument Protein Pp150 In The Trafficking And Assembly Of Infectious Virions, Sabarish Vellatheri Indran
All ETDs from UAB
Human cytomegalovirus, a ubiquitous human pathogen, establishes a persistent infection in the infected host. HCMV assembly takes place in the nucleus and cytoplasm of infected cells by a complex and incompletely defined process. The viral DNA is enclosed by the capsid, which is surrounded by a proteinaceous tegument, which is covered by a cell-derived envelope studded with viral glycoproteins. The assembly pathway and protein interactions required for formation of the tegument layer and the function of most of the proteins in the tegument remain poorly understood. In this study, we investigated the functions of an essential abundant tegument protein, pp150, …
The Role Of Fc Receptor-Like 2 In B Cell Signaling, Tanisha Anne Jackson
The Role Of Fc Receptor-Like 2 In B Cell Signaling, Tanisha Anne Jackson
All ETDs from UAB
Fc receptor-like 2 (FCRL2) is a transmembrane protein with immunomodulatory potential that is preferentially expressed by memory B cells in humans. It has two consensus immunoreceptor tyrosine-based inhibitory motifs (ITIM) in addition to a putative immunoreceptor tyrosine-based activation motif (ITAM) sequence in its cytoplasmic domain. We have confirmed the cellular distribution of FCRL2 and ana-lyzed its functional potential to show that coligation with the B cell receptor (BCR) leads to tyrosine phosphorylation of its ITIM motifs and subsequent SHP-1 recruitment to facilitate inhibition of BCR signaling. Mutational analysis indicates that the tyrosine residues in both inhibitory motifs of FCRL2 are …