Results 51 to 60 of about 343,845 (337)

Heme Interactions as Regulators of the Alternative Pathway Complement Responses and Implications for Heme-Associated Pathologies

Current Issues in Molecular Biology, 2023
Heme (Fe2+-protoporphyrin IX) is a pigment of life, and as a prosthetic group in several hemoproteins, it contributes to diverse critical cellular processes. While its intracellular levels are tightly regulated by networks of heme-binding proteins (HeBPs)
Stefanos A. Tsiftsoglou
doaj   +1 more source

Properdin: initiation of alternative complement pathway. [PDF]

Proceedings of the National Academy of Sciences, 1975
Activation of the classical complement (C) system involves conversion of C1 to its active state with subsequent cleavage of C4 and -d C2 so as to form the classical C3 convertase, C42 (a bar indicates the activated form of a protein), which sequentially cleaves C3 and C5 to initiate the cytolytic event associated with the complete reaction.
D T, Fearon, K F, Austen
openaire   +2 more sources

FHR-1 binds to C-reactive protein and enhances rather than inhibits complement activation [PDF]

, 2017
Factor H (FH)-related protein 1 (FHR-1) is one of the five human factor H-related proteins, which share sequence and structural homology with the alternative pathway complement inhibitor FH.
Bánlaki, Zsófia, Cserhalmi, Marcell, Csincsi, Ádám, Józsi, Mihály, Kárpáti, Éva, Prohászka, Zoltán, Szabó, Z., Uzonyi, Barbara   +7 more
core   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

A novel assay that characterizes properdin function shows neutrophil-derived properdin has a distinct oligomeric distribution

Frontiers in Immunology, 2023
Properdin acts as an essential positive regulator of the alternative pathway of complement by stabilizing enzymatic convertases. Identical properdin monomers form head-to-tail associations of oligomers in a reported 20:54:26 ratio (most often described ...
Sara R. Moore, Smrithi S. Menon, Neeti S. Galwankar, Sadik A. Khuder, Michael K. Pangburn, Viviana P. Ferreira   +5 more
doaj   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Neutrophils from ANCA-associated vasculitis patients show an increased capacity to activate the complement system via the alternative pathway after ANCA stimulation.

PLoS ONE, 2019
Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV), including granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA), are autoimmune conditions associated with small vessel inflammation.
Sophie Ohlsson, Lisa Holm, Christina Hansson, Susanne M Ohlsson, Lena Gunnarsson, Åsa Pettersson, Lillemor Skattum   +6 more
doaj   +1 more source

Enhanced Osteogenesis of Adipose-Derived Stem Cells by Regulating Bone Morphogenetic Protein Signaling Antagonists and Agonists. [PDF]

, 2016
UnlabelledAlthough adipose-derived stem cells (ASCs) are an attractive cell source for bone tissue engineering, direct use of ASCs alone has had limited success in the treatment of large bone defects.
Aghaloo, Tara L, Bezouglaia, Olga, Cui, Zhong-Kai, Fan, Jiabing, Fartash, Armita, Guo, Mian, Im, Choong Sung, Kim, Soyon, Lee, Min, Patel, Nikhil, Wang, Cun-Yu, Wu, Benjamin M   +11 more
core   +2 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source