Results 21 to 30 of about 23,738 (171)

C1q A08 Is a Half-Cryptic Epitope of Anti-C1q A08 Antibodies in Lupus Nephritis and Important for the Activation of Complement Classical Pathway

open access: yesFrontiers in Immunology, 2020
To investigate the fine epitope(s) of anti-C1q A08 antibodies and their roles in complement activation in lupus nephritis, C1q A08 and related peptides with various amino acid sequences around A08 were synthesized.
Wen-Jun Wu   +23 more
doaj   +1 more source

Cerebral complement C1q activation in chronic Toxoplasma infection [PDF]

open access: yesBrain, Behavior, and Immunity, 2016
Exposure to the neurotropic parasite, Toxoplasma gondii, causes significant brain and behavioral anomalies in humans and other mammals. Understanding the cellular mechanisms of T. gondii-generated brain pathologies would aid the advancement of novel strategies to reduce disease.
Jianchun, Xiao   +10 more
openaire   +2 more sources

Interaction of C1q With Pentraxin 3 and IgM Revisited: Mutational Studies With Recombinant C1q Variants

open access: yesFrontiers in Immunology, 2019
Pentraxins and complement defense collagens are soluble recognition proteins that sense pathogens and altered-self elements, and trigger immune responses including complement activation.
Isabelle Bally   +8 more
doaj   +1 more source

Different Complement Activation Pathways Underly Cognitive Impairment and Type 2 Diabetes Mellitus Combined With Cognitive Impairment

open access: yesFrontiers in Aging Neuroscience, 2022
BackgroundThe immune response and the complement system are associated with cognitive impairment and diabetes mellitus, respectively. Activation of the complement system in these diseases occurs mainly through either the classical pathway or the ...
Zhenxing Li   +7 more
doaj   +1 more source

Interaction between complement subcomponent C1q and bacterial lipopolysaccharides [PDF]

open access: yesBiochemical Journal, 1989
The heptose-less mutant of Escherichia coli, D31m4, bound complement subcomponent C1q and its collagen-like fragments (C1qCLF) with Ka values of 1.4 x 10(8) and 2.0 x 10(8) M-1 respectively. This binding was suppressed by chemical modification of C1q and C1qCLF using diethyl pyrocarbonate (DEPC).
A, Zohair   +3 more
openaire   +2 more sources

Complement C1q activates tumor suppressor WWOX to induce apoptosis in prostate cancer cells. [PDF]

open access: yesPLoS ONE, 2009
BACKGROUND:Tissue exudates contain low levels of serum complement proteins, and their regulatory effects on prostate cancer progression are largely unknown.
Qunying Hong   +10 more
doaj   +1 more source

C1 Complex: An Adaptable Proteolytic Module for Complement and Non-Complement Functions

open access: yesFrontiers in Immunology, 2017
Complement C1 is the defining component of the classical pathway. Within the C1qC1r2C1s2 complex, C1q functions as a molecular scaffold for C1r2C1s2 and C1q binding to its ligands activates these two serine proteases.
Jinhua Lu, Uday Kishore
doaj   +1 more source

Complement C1q expression in Erythema nodosum leprosum

open access: yesPLOS Neglected Tropical Diseases, 2018
Complement C1q is a soluble protein capable of initiating components of the classical pathway in host defence system. In earlier qualitative studies, C1q has been implicated in the pathogenesis of Erythema Nodosum Leprosum (ENL). However, little is known about the role of this complement in ENL reaction.
Edessa Negera   +5 more
openaire   +4 more sources

Complement Component C1q and Anti‐C1q Antibodies in Theory and in Clinical Practice [PDF]

open access: yesScandinavian Journal of Immunology, 2008
AbstractThe complement system is a major part of the innate immunity. The first component of the classical pathway of complement activation, C1q, plays a crucial role in the clearance of immune complexes and apoptotic bodies from the organism. Autoantibodies against C1q (anti‐C1q) have been found in a number of autoimmune and infectious diseases.
E, Potlukova, P, Kralikova
openaire   +2 more sources

Functional recombinant human complement C1q with different affinity tags [PDF]

open access: yesJournal of Immunological Methods, 2021
Complement C1q is a multifunctional protein able to sense pathogens and immune molecules such as immunoglobulins and pentraxins, and to trigger the classical complement pathway through activation of its two associated proteases, C1r and C1s. C1q is a multimeric protein composed of three homologous yet distinct polypeptide chains A, B, and C, each ...
Bally, Isabelle   +5 more
openaire   +4 more sources

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