Results 11 to 20 of about 10,182 (218)

Properdin inhibition ameliorates hepatic ischemia/reperfusion injury without interfering with liver regeneration in mice [PDF]

Frontiers in Immunology, 2023
Hepatic ischemia/reperfusion injury (IRI) often causes serious complications in liver surgeries, including transplantation. Complement activation seems to be involved in hepatic IRI; however, no complement-targeted intervention has been clinically ...
Jiro Kusakabe, Koichiro Hata, Tetsuya Tajima, Hidetaka Miyauchi, Xiangdong Zhao, Shoichi Kageyama, Tatsuaki Tsuruyama, Etsuro Hatano   +7 more
doaj   +3 more sources

Structure and function of a family of tick-derived complement inhibitors targeting properdin

Nature Communications, 2022
Properdin is the only known positive regulator of the human complement system, stabilising the convertase C3 in the alternative pathway of complement activation.
Katharina Braunger, Matthijs M Jore, Steven J Johnson   +2 more
exaly   +3 more sources

Prognostic Value of Complement Properdin in Cancer

Frontiers in Immunology, 2021
The complement system is readily triggered by the presence of damage-associated molecular patterns on the surface of tumor cells. The complement alternative pathway provides rapid amplification of the molecular stress signal, leading to complement ...
Alessandro Mangogna, Praveen Mathews Varghese, Chiara Agostinis   +2 more
exaly   +4 more sources

Insights Into Enhanced Complement Activation by Structures of Properdin and Its Complex With the C-Terminal Domain of C3b

Frontiers in Immunology, 2019
Properdin enhances complement-mediated opsonization of targeted cells and particles for immune clearance. Properdin occurs as dimers, trimers and tetramers in human plasma, which recognize C3b-deposited surfaces, promote formation, and prolong the ...
Nicholas M Pearce, Harma Brondijk, Piet Gros   +2 more
exaly   +4 more sources

Structural Basis for Properdin Oligomerization and Convertase Stimulation in the Human Complement System

Frontiers in Immunology, 2019
Properdin (FP) is a positive regulator of the immune system stimulating the activity of the proteolytically active C3 convertase C3bBb in the alternative pathway of the complement system. Here we present two crystal structures of FP and two structures of
Yong Wang, Rasmus K Jensen, Steen Vang Petersen   +2 more
exaly   +4 more sources

Urinary Properdin and sC5b-9 Are Independently Associated With Increased Risk for Graft Failure in Renal Transplant Recipients

Frontiers in Immunology, 2019
The pathophysiology of late kidney-allograft failure remains complex and poorly understood. Activation of filtered or locally produced complement may contribute to the progression of renal failure through tubular C5b-9 formation.
Michele F Eisenga, Robert A Pol, Stephan Bakker   +2 more
exaly   +4 more sources

Human Properdin Opsonizes Nanoparticles and Triggers a Potent Pro-inflammatory Response by Macrophages without Involving Complement Activation

Frontiers in Immunology, 2018
Development of nanoparticles as tissue-specific drug delivery platforms can be considerably influenced by the complement system because of their inherent pro-inflammatory and tumorigenic consequences.
Basudev Paudyal, Anuvinder Kaur, Gudrun Stenbeck   +2 more
exaly   +4 more sources

Properdin Deficiency Impairs Phagocytosis and Enhances Injury at Kidney Repair Phase Post Ischemia–Reperfusion

Frontiers in Immunology, 2021
Properdin, a positive regulator of complement alternative pathway, participates in renal ischemia–reperfusion (IR) injury and also acts as a pattern-recognition molecule affecting apoptotic T-cell clearance.
Yuanyuan Wu, Yuanyuan Wu, Zinah D. Zwaini, Nigel J. Brunskill, Nigel J. Brunskill, Xinyue Zhang, Hui Wang, Ravinder Chana, Cordula M. Stover, Bin Yang, Bin Yang   +10 more
doaj   +2 more sources

Human Properdin Released By Infiltrating Neutrophils Can Modulate Influenza A Virus Infection

Frontiers in Immunology, 2021
The complement system is designed to recognise and eliminate invading pathogens via activation of classical, alternative and lectin pathways. Human properdin stabilises the alternative pathway C3 convertase, resulting in an amplification loop that leads ...
Praveen M. Varghese, Praveen M. Varghese, Shuvechha Mukherjee, Futwan A. Al-Mohanna, Souad M. Saleh, Fahad N. Almajhdi, Nazar Beirag, Saad H. Alkahtani, Reena Rajkumari, Beatrice Nal Rogier, Robert B. Sim, Susan Idicula-Thomas, Taruna Madan, Valarmathy Murugaiah, Uday Kishore   +14 more
doaj   +2 more sources

HBSP improves kidney ischemia-reperfusion injury and promotes repair in properdin deficient mice via enhancing phagocytosis of tubular epithelial cells

Frontiers in Immunology, 2023
Phagocytosis plays vital roles in injury and repair, while its regulation by properdin and innate repair receptor, a heterodimer receptor of erythropoietin receptor (EPOR)/β common receptor (βcR), in renal ischaemia-reperfusion (IR) remains unclear ...
Yuanyuan Wu, Yuanyuan Wu, Lili Huang, Wenli Sai, Fei Chen, Yu Liu, Cheng Han, Joanna M. Barker, Zinah D. Zwaini, Mark P. Lowe, Nigel J. Brunskill, Nigel J. Brunskill, Bin Yang, Bin Yang   +13 more
doaj   +2 more sources