Results 21 to 30 of about 14,253 (157)

Strain Specific Variations in Acinetobacter baumannii Complement Sensitivity

open access: yesFrontiers in Immunology, 2022
The complement system is required for innate immunity against Acinetobacter baumannii, an important cause of antibiotic resistant systemic infections. A.
Gathoni Kamuyu   +12 more
doaj   +1 more source

Shiga Toxin 2a Binds to Complement Components C3b and C5 and Upregulates Their Gene Expression in Human Cell Lines

open access: yesToxins, 2020
Enterohemorrhagic Escherichia coli (EHEC) infections can cause EHEC-associated hemolytic uremic syndrome (eHUS) via its main virulent factor, Shiga toxins (Stxs). Complement has been reported to be involved in the progression of eHUS.
Sára Kellnerová   +10 more
doaj   +1 more source

Autoantibodies Against C3b—Functional Consequences and Disease Relevance

open access: yesFrontiers in Immunology, 2019
The complement component C3 is at the heart of the complement cascade. It is a complex protein, which generates different functional activated fragments (C3a, C3b, iC3b, C3c, C3d).
Vasil V. Vasilev   +13 more
doaj   +1 more source

The role of salivary and intestinal complement system inhibitors in the midgut protection of triatomines and mosquitoes. [PDF]

open access: yesPLoS ONE, 2009
Saliva of haematophagous arthropods contain biomolecules involved directly or indirectly with the haematophagy process, and among them are encountered some complement system inhibitors.
Veruska Cavalcanti Barros   +7 more
doaj   +1 more source

Staphylococcus aureus proteins Sbi and Efb recruit human plasmin to degrade complement C3 and C3b.

open access: yesPLoS ONE, 2012
Upon host infection, the human pathogenic microbe Staphylococcus aureus (S. aureus) immediately faces innate immune reactions such as the activated complement system. Here, a novel innate immune evasion strategy of S. aureus is described.
Tina K Koch   +7 more
doaj   +1 more source

Characterization of Binding Properties of Individual Functional Sites of Human Complement Factor H

open access: yesFrontiers in Immunology, 2020
Factor H exists as a 155,000 dalton, extended protein composed of twenty small domains which is flexible enough that it folds back on itself. Factor H regulates complement activation through its interactions with C3b and polyanions.
Aftabul Haque   +7 more
doaj   +1 more source

SARS-CoV-2 Spike- and Nucleoprotein-Specific Antibodies Induced After Vaccination or Infection Promote Classical Complement Activation

open access: yesFrontiers in Immunology, 2022
Antibodies specific for the spike glycoprotein (S) and nucleocapsid (N) SARS-CoV-2 proteins are typically present during severe COVID-19, and induced to S after vaccination.
Rachel E. Lamerton   +20 more
doaj   +1 more source

Role of Electrostatic Hotspots in the Selectivity of Complement Control Proteins Toward Human and Bovine Complement Inhibition

open access: yesFrontiers in Molecular Biosciences, 2021
Poxviruses are dangerous pathogens, which can cause fatal infection in unvaccinated individuals. The causative agent of smallpox in humans, variola virus, is closely related to the bovine vaccinia virus, yet the molecular basis of their selectivity is ...
Yogesh B. Narkhede   +14 more
doaj   +1 more source

Synovial Complement Factors in Patients with Periprosthetic Joint Infection after Undergoing Revision Arthroplasty of the Hip or Knee Joint

open access: yesDiagnostics, 2021
The role and diagnostic value of the synovial complement system in patients with low-grade periprosthetic joint infection (PJI) are unclear. We sought to evaluate, for the first time, the usefulness of synovial complement factors in these patients by ...
Frank Sebastian Fröschen   +6 more
doaj   +1 more source

Structural Model for Factor X Inhibition of IgM and Complement-Mediated Neutralization of Adenovirus

open access: yesViruses, 2023
Adenovirus has strong therapeutic potential as an oncolytic virus and gene therapy vector. However, injecting human species C serotype 5 adenovirus, HAdv-C5, into the bloodstream leads to numerous interactions with plasma proteins that affect viral ...
Nicole Wagner   +2 more
doaj   +1 more source

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