Results 241 to 250 of about 697,969 (251)
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Complement C4A and C4B Gene Copy Number Study in Alzheimer's Disease Patients.

Current Alzheimer Research, 2016
BACKGROUND/OBJECTIVES Increasing evidence suggests the importance of neuroinflammation in the pathogenesis of Alzheimer's disease (AD), which is a complex neurodegenerative disorder. Complement activation occurs in the brain of patients with AD and seems
M. Zorzetto   +7 more
semanticscholar   +1 more source

Binding of human complement component C4b-binding protein (C4BP) to Streptococcus pyogenes involves the C4b-binding site.

The Journal of Immunology, 1996
Abstract A key step in the elimination of invading pathogens from the body is the covalent binding of complement proteins C3b and C4b to their surface. However, many pathogens have evolved mechanisms to avoid the complement system of the host. Understanding how these mechanisms work may lead to more efficacious forms of therapy.
P, Accardo   +4 more
openaire   +2 more sources

Mechanism of activation of the classical pathway of complement by monoclonal IgE (DES). Restricted regulation of C4b by C4b‐binding protein

European Journal of Immunology, 1984
AbstractA human monoclonal IgE from patient DES, IgE (DES), has been shown to activate the classical pathway of complement. The mechanism of this activation has been investigated and can be summarized as follows: (a) IgE (DES) is able to bind and activate C1 in a dose‐dependent fashion.
openaire   +3 more sources

Structural Requirements for the Intracellular Subunit Polymerization of the Complement Inhibitor C4b-Binding Protein

Biochemistry, 2002
C4b-binding protein (C4BP), an important inhibitor of complement activation, has a unique spider-like shape. It is composed of six to seven identical alpha-chains with or without a single beta-chain, the chains being linked by disulfide bridges in their C-terminal parts.
Lena Kask   +4 more
openaire   +3 more sources

Comparison of two immunoassays for the complement protein C4b-binding protein in health and disease

International Journal of Clinical & Laboratory Research, 1995
An enzyme-linked immunoassay for human C4b-binding protein (concentration range 25-400 ng/ml) was developed using two monoclonal antibodies; the intra- and interassay coefficients of variation were less than 7.2%. In 50 normal subjects, 20 patients with liver cirrhosis and 34 full-term newborns, the plasma levels of C4b-binding protein were very ...
P. M. Mannucci   +4 more
openaire   +3 more sources

Complement system proteins which interact with C3b or C4b A superfamily of structurally related proteins

Immunology Today, 1986
Recent cDNA sequencing data has allowed the prediction of the entire amino acid sequences of complement components factor B and C2, the complement control proteins factor H and C4b-binding protein and a partial sequence for the Cab/C4b receptor CR1. These proteins all contain internal repeating units of approximately 60 amino acids, each repeating unit
Reid, K B M   +6 more
openaire   +4 more sources

The inhibition of covalent binding of the nascent complement component C4b to its target

Russian Journal of Bioorganic Chemistry, 2000
The inhibition of covalent binding of the nascent C4b fragment of the human complement component to its natural target, immunoglobulin G, was studied. To this end, an immunoenzyme system was developed. In this ELISA method, the complement was activated on the sorbed IgG molecules and the resulting nascent C4b fragment acylated IgG or interacted with a ...
Guzova Va   +7 more
openaire   +2 more sources

Extracellular histones inhibit complement activation through interactions with complement component C4b

Molecular Immunology, 2017
Yasir Alhamdi   +6 more
openaire   +2 more sources

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