Results 91 to 100 of about 712,823 (260)

The fc fragment of IgMs binds C1q to activate the first step of the classical complement pathway, while inhibiting complement‐dependent cytotoxicity

The FEBS Journal, EarlyView.
Multimeric IgM‐fragment crystallizable region (Fc) fragments retain the ability to bind C1q and initiate the classical complement pathway, leading to C4 activation and deposition in vitro. However, the Fc cores can also inhibit complement‐dependent cytotoxicity by competing with surface‐bound antibodies for C1q engagement.
Andrea J. Pinto, Anne Chouquet, Isabelle Bally, Véronique Rossi, Nicole M. Thielens, Chantal Dumestre‐Pérard, Renate Kunert, Christine Gaboriaud, Wai Li Ling, Jean‐Baptiste Reiser   +9 more
wiley   +1 more source

C4B null alleles are not associated with genetic polymorphisms in the adjacent gene CYP21A2 in autism

BMC Medical Genetics, 2008
Background Research indicates that the etiology of autism has a strong genetic component, yet so far the search for genes that contribute to the disorder, including several whole genome scans, has led to few consistent findings.
Odell J Dennis, Odell Daniel W, Sweeten Thayne L, Torres Anthony R   +3 more
doaj   +1 more source

Citrullination of C1-inhibitor as a mechanism of impaired complement regulation in rheumatoid arthritis

Frontiers in Immunology, 2023
BackgroundDysregulated complement activation, increased protein citrullination, and production of autoantibodies against citrullinated proteins are hallmarks of rheumatoid arthritis (RA).
Myriam Martin, Sara C. Nilsson, David Eikrem, Karin Fromell, Carsten Scavenius, Leonie M. Vogt, Ewa Bielecka, Jan Potempa, Jan Potempa, Jan J. Enghild, Bo Nilsson, Kristina N. Ekdahl, Kristina N. Ekdahl, Meliha C. Kapetanovic, Anna M. Blom   +14 more
doaj   +1 more source

VLBA monitoring of Mrk 421 at 15 GHz and 24 GHz during 2011 [PDF]

, 2012
High-resolution radio observations are ideal for constraining the value of physical parameters in the inner regions of active-galactic-nucleus jets and complement results on multiwavelength (MWL) observations. This study is part of a wider multifrequency
A. Marscher, Abdo, Chiaberge, Cornwell, D. Paneque, Deller, G. Giovannini, G. Piner, Gaidos, Georganopoulos, Ghisellini, Giovannini, Giroletti, Giroletti, Giroletti, Greisen, Henri, Hovatta, Högbom, K. V. Sokolovsky, L. Fuhrmann, Lister, Lyutikov, M. A. Perez-Torres, M. Giroletti, M. Kino, M. Orienti, Marscher, Orienti, P. G. Edwards, Piner, Piner, Piner, Piner, Piner, Punch, R. Lico, Readhead, S. Jorstad, Shepherd, T. P. Krichbaum, Tavecchio, Tingay, W. Cotton, Y. Y. Kovalev   +44 more
core   +3 more sources

Activation of the Lectin Pathway Drives Persistent Complement Dysregulation in Long COVID

Immunology, EarlyView.
The complement cascade, a series of blood proteins that assists in the recognition and neutralisation of pathogens, either independently or in conjunction with antibodies, is persistently activated in patients with long COVID. We found that blood plasma samples from patients with long COVID contained elevated concentrations of the mannan‐binding lectin‐
Samuel B. K. Keat, Priyanka Khatri, Youssif M. Ali, Chanuka H. Arachchilage, Gregory Demopulos, Kirsten Baillie, Kelly L. Miners, Kristin Ladell, Samantha A. Jones, Helen E. Davies, David A. Price, Wioleta M. Zelek, B. Paul Morgan, Wilhelm J. Schwaeble, Nicholas J. Lynch   +14 more
wiley   +1 more source

Islet Amyloid Polypeptide Triggers Limited Complement Activation and Binds Complement Inhibitor C4b-binding Protein, Which Enhances Fibril Formation [PDF]

Journal of Biological Chemistry, 2011
Islet amyloid polypeptide (IAPP) is synthesized in pancreatic β-cells and co-secreted with insulin. Aggregation and formation of IAPP-amyloid play a critical role in β-cell death in type 2 diabetic patients. Because Aβ-fibrils in Alzheimer disease activate the complement system, we have here investigated specific interactions between IAPP and ...
Sjölander, Jonatan, Westermark, Gunilla T, Renström, Erik, Blom, Anna   +3 more
openaire   +4 more sources

Inflammatory and Immunological Basis of Periodontal Diseases

Journal of Periodontal Research, EarlyView.
The periodontal lesion emerges as an evolving immunological battlefield, where host–microbiome interactions, dysregulated immune responses, fragile resolution mechanisms, and inflammophilic dysbiosis converge to shift the balance from homeostasis to unrestrained tissue destruction.
Giacomo Baima, Marion Arce, Mario Romandini, Thomas Van Dyke   +3 more
wiley   +1 more source

Antimicrobial peptides and complement in neonatal hypoxia-ischemia induced brain damage [PDF]

, 2015
Hypoxic-ischemic encephalopathy (HIE) is a clinical condition in the neonate, resulting from oxygen deprivation around the time of birth. HIE affects 1-5/1000 live births worldwide and is associated with the development of neurological deficits ...
Hristova, M, Rocha-Ferreira, E
core   +1 more source

The glia‐immune network: Astrocytes and oligodendrocytes as microglial co‐ordinators in health and disease

The Journal of Physiology, EarlyView.
Abstract figure legend The glia‐immune network involves the communication(s) of glia via immune signalling pathways. In neuro‐homeostasis these pathways have been shown to modulate key processes such as synaptic pruning and myelination. The dynamics of these processes is critical to CNS function.
Verity F. T. Mitchener, Millie J. Thackray, I. Lorena Arancibia‐Cárcamo   +2 more
wiley   +1 more source

Anti-HLA antibodies with complementary and synergistic interaction geometries promote classical complement activation on platelets

Haematologica, 2019
High titers of HLA antibodies are associated with platelet refractoriness, causing poor platelet increments after transfusions in a subset of patients with HLA antibodies.
Maaike Rijkers, David Schmidt, Nina Lu, Cynthia S.M. Kramer, Sebastiaan Heidt, Arend Mulder, Leendert Porcelijn, Frans H.J. Claas, Frank W.G. Leebeek, A.J. Gerard Jansen, Ilse Jongerius, Sacha S. Zeerleder, Gestur Vidarsson, Jan Voorberg, Masja de Haas   +14 more
doaj   +1 more source