Institution
University of Alabama at Birmingham
Education•Birmingham, Alabama, United States•
About: University of Alabama at Birmingham is a education organization based out in Birmingham, Alabama, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 38523 authors who have published 86775 publications receiving 3930642 citations. The organization is also known as: UAB & The University of Alabama at Birmingham.
Topics: Population, Poison control, Transplantation, Health care, Immune system
Papers published on a yearly basis
Papers
More filters
••
TL;DR: The experimental evidence for microbial adhesion to host cell proteoglycans is compelling, and future molecular studies may provide a basis for designing therapeutic strategies based on these interactions.
Abstract: A large array of glycoproteins, glycolipids, and proteoglycans decorate the surfaces of animal cells. These glycoconjugates mediate many fundamental cellular processes, including cell-cell and cell-matrix adhesion, motility, growth, and signaling (28, 110). Over time, many pathogenic microorganisms have learned to exploit cell surface glycoconjugates as receptors for attachment, a process which ultimately facilitates tissue colonization and invasion. The interaction of specific proteins on the surface of microorganisms (adhesins) with carbohydrate chains on the glycoconjugate (receptors) enables the microbes to take their first step towards establishing an infection. This review concentrates on proteoglycans as adhesion receptors for bacteria, viruses, and parasites. Microbial binding to glycolipids and glycoproteins also occurs and has been discussed elsewhere (27, 40, 61–63, 85, 94). Proteoglycans are ubiquitous among animal cells, and as discussed below, their carbohydrate chains (glycosaminoglycans) bind many different protein ligands. Different experimental criteria have been used to establish a role for proteoglycans in attachment and invasion of host cells, including direct binding measurements, identification of microbial carbohydrate-binding proteins, competition studies with defined polysaccharides, loss of adhesion upon enzymatic removal of host glycans, and altered adherence to animal cell mutants with defective glycosaminoglycan biosynthesis. Overall, the experimental evidence for microbial adhesion to host cell proteoglycans is compelling, and future molecular studies may provide a basis for designing therapeutic strategies based on these interactions.
494 citations
••
TL;DR: Observations are consistent with previous results using chronically rejecting human renal allografts and provide a compelling argument supporting the involvement of peroxynitrite during this pathophysiologic condition.
Abstract: Previous studies from our laboratory have demonstrated that the mitochondrial protein manganese superoxide dismutase is inactivated, tyrosine nitrated, and present as higher molecular mass species during human renal allograft rejection. To elucidate mechanisms whereby tyrosine modifications might result in loss of enzymatic activity and altered structure, the effects of specific biological oxidants on recombinant human manganese superoxide dismutase in vitro have been evaluated. Hydrogen peroxide or nitric oxide had no effect on enzymatic activity, tyrosine modification, or electrophoretic mobility. Exposure to either hypochlorous acid or tetranitromethane (pH 6) inhibited (approximately 50%) enzymatic activity and induced the formation of dityrosine and higher mass species. Treatment with tetranitromethane (pH 8) inhibited enzymatic activity 67% and induced the formation of nitrotyrosine. In contrast, peroxynitrite completely inhibited enzymatic activity and induced formation of both nitrotyrosine and dityrosine along with higher molecular mass species. Combination of real-time spectral analysis and electrospray mass spectroscopy revealed that only three (Y34, Y45, and Y193) of the nine total tyrosine residues in manganese superoxide dismutase were nitrated by peroxynitrite. Inspection of X-ray crystallographic data suggested that neighboring glutamate residues associated with two of these tyrosines may promote targeted nitration by peroxynitrite. Tyr34, which is present in the active site, appeared to be the most susceptible residue to peroxynitrite-mediated nitration. Collectively, these observations are consistent with previous results using chronically rejecting human renal allografts and provide a compelling argument supporting the involvement of peroxynitrite during this pathophysiologic condition.
493 citations
••
Centers for Disease Control and Prevention1, United States Public Health Service2, Harvard University3, New York University4, University of Colorado Denver5, University of Texas at Dallas6, Nationwide Children's Hospital7, Johns Hopkins University8, Yale University9, Westchester Medical Center10, Rutgers University11, University of Alabama at Birmingham12, Children's Mercy Hospital13, University of Miami14, University of North Carolina at Chapel Hill15, Baylor College of Medicine16, University of Mississippi17, Vanderbilt University18, SUNY Downstate Medical Center19, California State University, Long Beach20, University of Minnesota21, Saint Barnabas Medical Center22, University of Arkansas for Medical Sciences23, Children's Hospital Oakland Research Institute24, Boston Children's Hospital25, University of Washington26, Central Michigan University27, Icahn School of Medicine at Mount Sinai28, University of Iowa29, Indiana University30, Emory University31, Medical University of South Carolina32, University of Pennsylvania33, Northwestern University34
TL;DR: In this article, the authors compared clinical characteristics and outcomes of children and adolescents with MIS-C vs those with severe coronavirus disease 2019 (COVID-19) at 66 US hospitals in 31 states.
Abstract: Importance Refinement of criteria for multisystem inflammatory syndrome in children (MIS-C) may inform efforts to improve health outcomes. Objective To compare clinical characteristics and outcomes of children and adolescents with MIS-C vs those with severe coronavirus disease 2019 (COVID-19). Setting, Design, and Participants Case series of 1116 patients aged younger than 21 years hospitalized between March 15 and October 31, 2020, at 66 US hospitals in 31 states. Final date of follow-up was January 5, 2021. Patients with MIS-C had fever, inflammation, multisystem involvement, and positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reverse transcriptase–polymerase chain reaction (RT-PCR) or antibody test results or recent exposure with no alternate diagnosis. Patients with COVID-19 had positive RT-PCR test results and severe organ system involvement. Exposure SARS-CoV-2. Main Outcomes and Measures Presenting symptoms, organ system complications, laboratory biomarkers, interventions, and clinical outcomes. Multivariable regression was used to compute adjusted risk ratios (aRRs) of factors associated with MIS-C vs COVID-19. Results Of 1116 patients (median age, 9.7 years; 45% female), 539 (48%) were diagnosed with MIS-C and 577 (52%) with COVID-19. Compared with patients with COVID-19, patients with MIS-C were more likely to be 6 to 12 years old (40.8% vs 19.4%; absolute risk difference [RD], 21.4% [95% CI, 16.1%-26.7%]; aRR, 1.51 [95% CI, 1.33-1.72] vs 0-5 years) and non-Hispanic Black (32.3% vs 21.5%; RD, 10.8% [95% CI, 5.6%-16.0%]; aRR, 1.43 [95% CI, 1.17-1.76] vs White). Compared with patients with COVID-19, patients with MIS-C were more likely to have cardiorespiratory involvement (56.0% vs 8.8%; RD, 47.2% [95% CI, 42.4%-52.0%]; aRR, 2.99 [95% CI, 2.55-3.50] vs respiratory involvement), cardiovascular without respiratory involvement (10.6% vs 2.9%; RD, 7.7% [95% CI, 4.7%-10.6%]; aRR, 2.49 [95% CI, 2.05-3.02] vs respiratory involvement), and mucocutaneous without cardiorespiratory involvement (7.1% vs 2.3%; RD, 4.8% [95% CI, 2.3%-7.3%]; aRR, 2.29 [95% CI, 1.84-2.85] vs respiratory involvement). Patients with MIS-C had higher neutrophil to lymphocyte ratio (median, 6.4 vs 2.7,P Conclusions and Relevance This case series of patients with MIS-C and with COVID-19 identified patterns of clinical presentation and organ system involvement. These patterns may help differentiate between MIS-C and COVID-19.
493 citations
••
TL;DR: Results suggest that NO production and its extracellular movement may be links in the pathway from NMDA receptor activation to changes in chemical signaling in surrounding synaptic terminals in the cerebral cortex.
Abstract: L-Glutamate and norepinephrine are examples of a major excitatory neurotransmitter and a neuromodulator in the cerebral cortex, respectively. Little is known of how chemical signaling between the anatomically distinct chemical pathways occurs. Specific activation of the N-methyl-D-aspartate (NMDA) class of glutamate receptor in synaptosomal preparations from guinea pig cerebral cortex caused release of both of these chemicals, and this release was blocked by agents that inhibit nitric oxide (NO) production or remove NO from the extracellular space. Furthermore, neurotransmitter release correlated with cortical NO production after NMDA receptor stimulation. These results suggest that NO production and its extracellular movement may be links in the pathway from NMDA receptor activation to changes in chemical signaling in surrounding synaptic terminals in the cerebral cortex.
493 citations
••
TL;DR: It is demonstrated that these individual constituent activities harmonize to govern the overall metabolic efficacy, which predominantly results from synergistic glucagon action to increase energy expenditure, GLP-1 action to reduce caloric intake and improve glucose control, and GIP action to potentiate the incretin effect and buffer against the diabetogenic effect of inherent glucagon activity.
Abstract: We report the discovery of a new monomeric peptide that reduces body weight and diabetic complications in rodent models of obesity by acting as an agonist at three key metabolically-related peptide hormone receptors: glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP) and glucagon receptors. This triple agonist demonstrates supraphysiological potency and equally aligned constituent activities at each receptor, all without cross-reactivity at other related receptors. Such balanced unimolecular triple agonism proved superior to any existing dual coagonists and best-in-class monoagonists to reduce body weight, enhance glycemic control and reverse hepatic steatosis in relevant rodent models. Various loss-of-function models, including genetic knockout, pharmacological blockade and selective chemical knockout, confirmed contributions of each constituent activity in vivo. We demonstrate that these individual constituent activities harmonize to govern the overall metabolic efficacy, which predominantly results from synergistic glucagon action to increase energy expenditure, GLP-1 action to reduce caloric intake and improve glucose control, and GIP action to potentiate the incretin effect and buffer against the diabetogenic effect of inherent glucagon activity. These preclinical studies suggest that, so far, this unimolecular, polypharmaceutical strategy has potential to be the most effective pharmacological approach to reversing obesity and related metabolic disorders.
492 citations
Authors
Showing all 38940 results
Name | H-index | Papers | Citations |
---|---|---|---|
Rudolf Jaenisch | 206 | 606 | 178436 |
Joel Schwartz | 183 | 1149 | 109985 |
Tadamitsu Kishimoto | 181 | 1067 | 130860 |
Jasvinder A. Singh | 176 | 2382 | 223370 |
Gregg L. Semenza | 168 | 502 | 130316 |
David R. Jacobs | 165 | 1262 | 113892 |
Hua Zhang | 163 | 1503 | 116769 |
David R. Holmes | 161 | 1624 | 114187 |
David Cella | 156 | 1258 | 106402 |
Elaine S. Jaffe | 156 | 828 | 112412 |
Michael A. Matthay | 151 | 998 | 98687 |
Lawrence Corey | 146 | 773 | 78105 |
Barton F. Haynes | 144 | 911 | 79014 |
Douglas D. Richman | 142 | 633 | 82806 |
Kjell Fuxe | 142 | 1479 | 89846 |