Results 51 to 60 of about 8,609 (172)

Fasciola hepatica is refractory to complement killing by preventing attachment of mannose binding lectin (MBL) and inhibiting MBL-associated serine proteases (MASPs) with serpins.

PLoS Pathogens, 2022
The complement system is a first-line innate host immune defence against invading pathogens. It is activated via three pathways, termed Classical, Lectin and Alternative, which are mediated by antibodies, carbohydrate arrays or microbial liposaccharides,
Carolina De Marco Verissimo, Heather L Jewhurst, József Dobó, Péter Gál, John P Dalton, Krystyna Cwiklinski   +5 more
doaj   +1 more source

Enolase of Streptococcus pneumoniae Binds Human Complement Inhibitor C4b-Binding Protein and Contributes to Complement Evasion [PDF]

The Journal of Immunology, 2012
Abstract Streptococcus pneumoniae (pneumococcus) is a pathogen that causes severe local and life-threatening invasive diseases, which are associated with high mortality rates. Pneumococci have evolved several strategies to evade the host immune system, including complement to disseminate and to survive in various host niches.
Vaibhav, Agarwal, Sven, Hammerschmidt, Sven, Malm, Simone, Bergmann, Kristian, Riesbeck, Anna M, Blom   +5 more
openaire   +2 more sources

Hyaluronic Acid Decoration Facilitates CD44‐Mediated Targeting and Alters Protein Corona Formation of Extracellular Vesicles

Journal of Extracellular Vesicles, Volume 15, Issue 4, April 2026.
ABSTRACT Cell recognition and uptake of extracellular vesicles (EVs) is mediated by a variety of surface molecules. Growing interest has recently been drawn towards glycan structures on EVs. Hyaluronic acid (HA) is a negatively charged glycosaminoglycan that can decorate the surface of EVs from different origins.
Heikki Kyykallio, Elena Scurti, Martina Hanzlíková, Kirsti Härkönen, Tuovi Salo, Veera Keinonen, Janne Capra, Tapani Viitala, Jaakko Teppo, Tatu Lajunen, Kirsi Rilla   +10 more
wiley   +1 more source

REV-ERBα mediates complement expression and diurnal regulation of microglial synaptic phagocytosis

eLife, 2020
The circadian clock regulates various aspects of brain health including microglial and astrocyte activation. Here, we report that deletion of the master clock protein BMAL1 in mice robustly increases expression of complement genes, including C4b and C3 ...
Percy Griffin, Patrick W Sheehan, Julie M Dimitry, Chun Guo, Michael F Kanan, Jiyeon Lee, Jinsong Zhang, Erik S Musiek   +7 more
doaj   +1 more source

Nuclear Factor I‐B Delays Liver Fibrosis by Inhibiting Chemokine Ligand 5 Transcription

Advanced Science, Volume 13, Issue 13, 3 March 2026.
This study identifies the transcription factor Nuclear Factor I‐B (NFIB) as a key suppressor of liver fibrosis. NFIB expression declines during hepatic stellate cell activation, and its overexpression reduces fibrosis in mice models. The mechanism involves NFIB directly repressing chemokine C─C motif ligand 5 (CCL5), thereby alleviating oxidative ...
Qianqian Chen, Fajuan Rui, Zhiwen Fan, Hongju Yang, Nan Geng, Chenqi Lu, Wenjing Ni, Yue Huan, Junping Shi, Chao Wu, Shengxia Yin, Wei An, Xia Lu, Qianwen Zhao, Jie Li   +14 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

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

The Role of Extracellular Vesicles in Transient Ischaemic Attacks and Ischaemic Stroke: A Systematic Review

Journal of Extracellular Biology, Volume 5, Issue 3, March 2026.
Both transient ischaemic attack (TIA) and ischaemic stroke lead to an increase in individual cellular‐derived populations of extracellular vesicles (EVs), including endothelial, platelet and leukocyte derived. These EVs have downstream roles in the pathophysiological events associated with TIA and stroke, including dysregulated inflammation and ...
Rebecca Marie Raven, Philip Eurig James, Keith Morris, Jessica Olivia Williams   +3 more
wiley   +1 more source

Functional recruitment of human complement inhibitor C4B-binding protein to outer membrane protein Rck of Salmonella. [PDF]

PLoS ONE, 2011
Resistance to complement mediated killing, or serum resistance, is a common trait of pathogenic bacteria. Rck is a 17 kDa outer membrane protein encoded on the virulence plasmid of Salmonella enterica serovars Typhimurium and Enteritidis.
Derek K Ho, Jorma Tissari, Hanna M Järvinen, Anna M Blom, Seppo Meri, Hanna Jarva   +5 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