Complement System Proteins
Mostrando 13-24 de 186 artigos, teses e dissertações.
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13. The regulatory C proteins from different restriction-modification systems can cross-complement.
The BamHI restriction-modification system contains a third gene, bamHIC, which positively regulates bamHIR. Similar small genes from other systems were tested in vivo for their ability to cross-complement. C.BamHI protein was identified, purified, and used to raise polyclonal antibodies. Attempts to detect other C proteins in cell extracts by cross-reactivit
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14. Simple Method To Distinguish between Primary and Secondary C3 Deficiencies
Due to the increasing numbers of reported clinical cases of complement deficiency in medical centers, clinicians are now more aware of the role of the complement system in the protection against infections caused by microorganisms. Therefore, clinical laboratories are now prepared to perform a number of diagnostic tests of the complement system other than th
American Society for Microbiology.
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15. Complement system on the attack in autoimmunity
The antiphospholipid syndrome is characterized clinically by fetal loss and thrombosis and serologically by the presence of autoantibodies to lipid-binding proteins. In a model of this procoagulant condition in which these antibodies are injected into pregnant mice, fetal loss was prevented by blocking of complement activation. Specifically, interaction of c
American Society for Clinical Investigation.
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16. Infectious diseases associated with complement deficiencies.
The complement system consists of both plasma and membrane proteins. The former influence the inflammatory response, immune modulation, and host defense. The latter are complement receptors, which mediate the cellular effects of complement activation, and regulatory proteins, which protect host cells from complement-mediated injury. Complement activation occ
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17. The Yeast Candida albicans Binds Complement Regulators Factor H and FHL-1
The human facultative pathogenic yeast Candida albicans causes mucocutaneous infections and is the major cause of opportunistic fungal infections in immunocompromised patients. C. albicans activates both the alternative and classical pathway of the complement system. The aim of this study was to assay whether C. albicans binds human complement regulators in
American Society for Microbiology.
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18. The Hyphal and Yeast Forms of Candida albicans Bind the Complement Regulator C4b-Binding Protein
Candida albicans, an important pathogenic yeast, activates all three pathways of the complement system. To understand how this yeast evades the effects of the activated system, we have analyzed the binding of the classical pathway inhibitor C4b-binding protein (C4BP) by C. albicans. Purified native as well as recombinant C4BP bound dose dependently to the ye
American Society for Microbiology.
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19. Human Immunodeficiency Virus Type 1 Induces Expression of Complement Factors in Human Astrocytes
Since the brain is separated from the blood immune system by a tight barrier, the brain-resident complement system may represent a central player in the immune defense of this compartment against human immunodeficiency virus (HIV). Chronic complement activation, however, may participate in HIV-associated neurodegeneration. Since the level of complement facto
American Society for Microbiology.
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20. Adaptation of the Ras-recruitment system to the analysis of interactions between membrane-associated proteins
Interactions of membrane-associated proteins play important roles in many cellular processes. The yeast two-hybrid assay is of limited utility for the analysis of such interactions, due to the need for soluble protein partners, whose interaction is assessed in the nucleus. The advent of the Ras-recruitment system (RRS) has enabled the study of membrane-assoc
Oxford University Press.
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21. Heat shock protein 70 is a potent activator of the human complement system
According to new hypotheses, extracellular heat shock proteins (Hsps) may represent an ancestral danger signal of cellular death or lysis-activating innate immunity. Recent studies demonstrating a dual role for Hsp70 as both a chaperone and cytokine, inducing potent proinflammatory response in human monocytes, provided support for the hypothesis that extrac
Cell Stress Society International.
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22. Ontogeny of the Human Complement System: In Vitro Biosynthesis of Individual Complement Components by Fetal Tissues
The human fetal liver is capable of synthesizing the biologically active form of the second (C2) and fourth (C4) components of complement as early as 8 wk after conception, and the inhibitor of C1 (C1 INH) as early as 11 wk after conception. Biologically active C3 was produced in vitro by fetal liver obtained at 14 wk gestation. These conclusions were based
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23. Pulmonary alveolar type II epithelial cells synthesize and secrete proteins of the classical and alternative complement pathways.
The serum complement system is a major mediator of inflammation reactions. Two of the complement proteins, the third (C3) and fifth (C5) components, are precursors of potent phlogistic molecules, C3a and C5a. C5a has potent chemotactic activity and plays an active role in pulmonary inflammation. We present evidence suggesting that several complement proteins
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24. Humoral response to herpes simplex virus is complement-dependent
The complement system represents a cascade of serum proteins, which provide a major effector function in innate immunity. Recent studies have revealed that complement links innate and adaptive immunity via complement receptors CD21/CD35 in that it enhances the B cell memory response to noninfectious protein antigens introduced i.v. To examine the import
The National Academy of Sciences.