Results 11 to 20 of about 686,133 (287)

The lectin pathway of complement activation is a critical component of the innate immune response to pneumococcal infection. [PDF]

PLoS Pathogens, 2012
The complement system plays a key role in host defense against pneumococcal infection. Three different pathways, the classical, alternative and lectin pathways, mediate complement activation.
Youssif M Ali, Nicholas J Lynch, Kashif S Haleem, Teizo Fujita, Yuichi Endo, Soren Hansen, Uffe Holmskov, Kazue Takahashi, Gregory L Stahl, Thomas Dudler, Umakhanth V Girija, Russell Wallis, Aras Kadioglu, Cordula M Stover, Peter W Andrew, Wilhelm J Schwaeble   +15 more
doaj   +5 more sources

Proprotein Convertases and the Complement System

Frontiers in Immunology, 2022
Proteins destined for secretion - after removal of the signal sequence - often undergo further proteolytic processing by proprotein convertases (PCs).
József Dobó, Andrea Kocsis, Ráhel Dani, Péter Gál   +3 more
doaj   +1 more source

Functional Analysis of Two Divergent C4 Isotypes in the Classical and Lectin Pathways of Complement Activation in the Common Carp (Cyprinus carpio)

Journal of Marine Science and Engineering, 2023
In the evolution of the complement system, a major humoral innate immune factor, the existence of multiple isotypes of the complement components is considered as a key strategy to enhance innate immune defense. Complement C4 is also diversified in a wide
Rosli Nehlah, Akira Yamamoto, Takahiro Nagasawa, Tomonori Somamoto, Miki Nakao   +4 more
doaj   +1 more source

The Sez6 Family Inhibits Complement by Facilitating Factor I Cleavage of C3b and Accelerating the Decay of C3 Convertases

Frontiers in Immunology, 2021
The Sez6 family consists of Sez6, Sez6L, and Sez6L2. Its members are expressed throughout the brain and have been shown to influence synapse numbers and dendritic morphology. They are also linked to various neurological and psychiatric disorders.
Wen Q. Qiu, Shaopeiwen Luo, Stefanie A. Ma, Priyanka Saminathan, Herman Li, Jenny M. Gunnersen, Harris A. Gelbard, Jennetta W. Hammond   +7 more
doaj   +1 more source

Complement Activation-Independent Attenuation of SARS-CoV-2 Infection by C1q and C4b-Binding Protein

Viruses, 2023
The complement system is a key component of the innate immune response to viruses and proinflammatory events. Exaggerated complement activation has been attributed to the induction of a cytokine storm in severe SARS-CoV-2 infection.
Nazar Beirag, Praveen M. Varghese, Martin Mayora Neto, Ahmad Al Aiyan, Haseeb A. Khan, Moneeb Qablan, Mohamed H. Shamji, Robert B. Sim, Nigel Temperton, Uday Kishore   +9 more
doaj   +1 more source

SALO, a novel classical pathway complement inhibitor from saliva of the sand fly Lutzomyia longipalpis. [PDF]

Sci Rep, 2016
Blood-feeding insects inject potent salivary components including complement inhibitors into their host's skin to acquire a blood meal. Sand fly saliva was shown to inhibit the classical pathway of complement; however, the molecular identity of the ...
Ferreira VP, Fazito Vale V, Pangburn MK, Abdeladhim M, Mendes-Sousa AF, Coutinho-Abreu IV, Rasouli M, Brandt EA, Meneses C, Lima KF, Nascimento Araújo R, Pereira MH, Kotsyfakis M, Oliveira F, Kamhawi S, Ribeiro JM, Gontijo NF, Collin N, Valenzuela JG.   +18 more
europepmc   +3 more sources

Complement activation negatively affects the platelet response to thrombopoietin receptor agonists in patients with immune thrombocytopenia: a prospective cohort study

Platelets, 2023
Increased platelet destruction is central in the pathogenesis of immune thrombocytopenia. However, impaired platelet production is also relevant and its significance underlies the rationale for treatment with thrombopoietin receptor agonists (TPO-RAs ...
Alexander Åkesson, James B. Bussel, Myriam Martin, Anna M. Blom, Jenny Klintman, Waleed Ghanima, Eva Zetterberg, Lamya Garabet   +7 more
doaj   +1 more source

Cytokine and Complement Response in the Glaucomatous βB1-CTGF Mouse Model

Frontiers in Cellular Neuroscience, 2021
Glaucoma is a complex neurodegenerative disease leading to a loss of retinal ganglion cells (RGCs) and optic nerve axons. An activation of the complement system seems to contribute to cell loss in this disease.
Sabrina Reinehr, Johanna D. Doerner, Ana M. Mueller-Buehl, Dennis Koch, Rudolf Fuchshofer, H. Burkhard Dick, Stephanie C. Joachim   +6 more
doaj   +1 more source

Is the Complement Protein C1q a Pro- or Anti-tumorigenic Factor? Bioinformatics Analysis Involving Human Carcinomas

Frontiers in Immunology, 2019
C1q is the first subcomponent of the classical pathway of the complement system and belongs to the C1q/Tumor Necrosis Factor superfamily. C1q can perform a diverse range of immune and non-immune functions in a complement-dependent as well as -independent
Alessandro Mangogna, Chiara Agostinis, Deborah Bonazza, Beatrice Belmonte, Paola Zacchi, Gabriella Zito, Andrea Romano, Fabrizio Zanconati, Giuseppe Ricci, Giuseppe Ricci, Uday Kishore, Roberta Bulla   +11 more
doaj   +1 more source

Direct versus Delayed pathways in Strong-Field Non-Sequential Double Ionization [PDF]

, 2010
We report full-dimensionality quantum and classical calculations for double ionization of laser-driven helium at 390 nm. Good qualitative agreement is observed.
A Emmanouilidou, Abrines R, Becker A, J S Parker, K T Taylor, L R Moore, Landau L D, Parker J S   +7 more
core   +2 more sources