Results 81 to 90 of about 2,642,556 (405)

Near Sample-Optimal Reduction-based Policy Learning for Average Reward MDP [PDF]

arXiv, 2022
This work considers the sample complexity of obtaining an $\varepsilon$-optimal policy in an average reward Markov Decision Process (AMDP), given access to a generative model (simulator). When the ground-truth MDP is weakly communicating, we prove an upper bound of $\widetilde O(H \varepsilon^{-3} \ln \frac{1}{\delta})$ samples per state-action pair ...
arxiv  

Ion channel function of polycystin‐2/polycystin‐1 heteromer revealed by structure‐guided mutagenesis

FEBS Letters, EarlyView.
Mutations in polycystin‐1 (PC1) or polycystin‐2 (PC2) cause autosomal‐dominant polycystic kidney disease (ADPKD). We generated a novel gain‐of‐function PC2/PC1 heteromeric ion channel by mutating pore‐blocking residues. Moreover, we demonstrated that PC2 will preferentially assemble with PC1 to form heteromeric complexes when PC1 is co‐expressed ...
Tobias Staudner, Juthamas Khamseekaew, M. Gregor Madej, Linda Geiges, Bardha Azemi, Christine Ziegler, Christoph Korbmacher, Alexandr V. Ilyaskin   +7 more
wiley   +1 more source

Contribución de variantes funcionales y cuantitativas del Factor H y las proteínas FHRs (Factor H-Related proteins) del Complemento en patología renal

Nefrología, 2022
Resumen: El sistema del Complemento protege al organismo frente a procesos infecciosos, tumorales y autoinmunes, y requiere una regulación muy estricta para evitar una activación excesiva o inespecífica.
Irene Gómez Delgado, Pilar Sánchez-Corral   +1 more
doaj  

Thrombomodulin enhances complement regulation through strong affinity interactions with factor H and C3b-Factor H complex [PDF]

, 2016
Introduction Coagulation and complement systems are simultaneously activated at sites of tissue injury, leading to thrombin generation and opsonisation with C3b.
Baerga-Ortiz, Bajzar, Boehme, Bossi, Campbell, Conway, de Córdoba S, Delvaeye, Dragon-Durey, Esmon, Esmon, Esmon, Esparza-Gordillo, Faust, Fuentes-Prior, Gordon, Hakobyan, Hamad, Harris, Heurich, Hindmarsh, Honda, Huntington, Ikeda, Ito, Jokiranta, Kavanagh, Li, Light, Maga, Markiewski, Martinez-Barricarte, Mayer, Meri, Mizuno, Moll, Morgan, Mouksassi, Noris, Owen, Pangburn, Sadler, Sadler, Saito, Salem, Sawada, Schramm, Shental-Bechor, Suzuki, Tateishi, Tortajada, Udagawa, Vincent, Walport, Walport, Wu, Yada, Yamamoto, Zushi   +58 more
core   +1 more source

An Induced Pluripotent Stem Cell Patient Specific Model of Complement Factor H (Y402H) Polymorphism Displays Characteristic Features of Age‐Related Macular Degeneration and Indicates a Beneficial Role for UV Light Exposure

Stem Cells, 2017
Age‐related macular degeneration (AMD) is the most common cause of blindness, accounting for 8.7% of all blindness globally. Vision loss is caused ultimately by apoptosis of the retinal pigment epithelium (RPE) and overlying photoreceptors.
D. Hallam, J. Collin, S. Bojic, V. Chichagova, A. Buskin, Yaobo Xu, Lucia Lafage, Elsje G. Otten, G. Anyfantis, Carla B. Mellough, S. Przyborski, Sameer E. Alharthi, V. Korolchuk, A. Lotery, G. Saretzki, M. Mckibbin, L. Armstrong, D. Steel, D. Kavanagh, M. Lako   +19 more
semanticscholar   +1 more source

Complement Factor H

Definitions, 2020
Complement factor H (fH) is a single chain plasma glycoprotein (approximately 150 kDa in size), with 20 domains termed complement control protein (CCP) domains or short consensus repeats (SCR).
A. Dinasarapu, A. Chandrasekhar, M. Józsi, S. Subramaniam   +3 more
semanticscholar   +1 more source

Variants in Complement Factor H and Complement Factor H-Related Protein Genes, CFHR3 and CFHR1, Affect Complement Activation in IgA Nephropathy [PDF]

Journal of the American Society of Nephrology, 2015
Complement activation is common in patients with IgA nephropathy (IgAN) and associated with disease severity. Our recent genome-wide association study of IgAN identified susceptibility loci on 1q32 containing the complement regulatory protein-encoding genes CFH and CFHR1-5, with rs6677604 in CFH as the top single-nucleotide polymorphism and CFHR3-1 ...
Damin Xu, Jan Novak, Feng Yu, Feng-Mei Wang, Hong Zhang, Lijun Liu, Sufang Shi, Ping Hou, Li Zhu, Jicheng Lv, Ya-Ling Zhai, Ali G. Gharavi, Ming-Hui Zhao   +12 more
openaire   +3 more sources

Unlocking the potential of tumor‐derived DNA in urine for cancer detection: methodological challenges and opportunities

Molecular Oncology, EarlyView.
Urine is a rich source of biomarkers for cancer detection. Tumor‐derived material is released into the bloodstream and transported to the urine. Urine can easily be collected from individuals, allowing non‐invasive cancer detection. This review discusses the rationale behind urine‐based cancer detection and its potential for cancer diagnostics ...
Birgit M. M. Wever, Renske D. M. Steenbergen   +1 more
wiley   +1 more source

Low molecular weight polysialic acid binds to properdin and reduces the activity of the alternative complement pathway [PDF]

, 2022
Sialic acids as the terminal caps of the cellular glycocalyx play an essential role in self-recognition and were shown to modulate complement processes via interaction between α2,3-linked sialic acids and complement factor H. Previously, it was suggested
Bungartz, Annemarie, Lackmann, Marie, Liao, Huan, Lin, Yuchen, Mbroh, Joshua, Neumann, Harald, Shahraz, Anahita, Skerka, Christine, Winkler, Jonas, Zipfel, Peter F.   +9 more
core   +1 more source

Complement and coagulation crosstalk – Factor H in the spotlight

Immunobiology, 2023
The immune complement and the coagulation systems are blood-based proteolytic cascades that are activated by pathway-specific triggers, based on protein-protein interactions and enzymatic cleavage reactions. Activation of these systems is finely balanced and controlled through specific regulatory mechanisms.
Meike Heurich, Geneviève McCluskey
openaire   +2 more sources