Results 51 to 60 of about 13,620 (172)

Innate Sensing of Influenza A Virus Hemagglutinin Glycoproteins by the Host Endoplasmic Reticulum (ER) Stress Pathway Triggers a Potent Antiviral Response via ER-Associated Protein Degradation [PDF]

Journal of Virology, 2018
ABSTRACT Innate immunity provides an immediate defense against infection after host cells sense danger signals from microbes. Endoplasmic reticulum (ER) stress arises from accumulation of misfolded/unfolded proteins when protein load overwhelms the ER folding capacity, which activates the unfolded protein response (UPR) to restore ER ...
Dylan A. Frabutt, Bin Wang, Sana Riaz, Richard C. Schwartz, Yong-Hui Zheng   +4 more
openaire   +2 more sources

Membrane Fusion‐Inspired Nanomaterials: Emerging Strategies for Infectious Disease and Cancer Diagnostics

Advanced Healthcare Materials, EarlyView.
Membrane fusion‐inspired nanomaterials offer transformative potential in diagnostics by mimicking natural fusion processes to achieve highly sensitive and specific detection of disease biomarkers. This review highlights recent advancements in nanomaterial functionalization strategies, signal amplification systems, and stimuli‐responsive fusion designs,
Sojeong Lee, Khulan Nyamzaya, Jueun Han, Yejin Song, Jihee Lee, Jung Hyun Jo, Seungmin Bang, Eun‐Kyung Lim, Seungjoo Haam, Eunjung Kim   +9 more
wiley   +1 more source

Amino Acid Residue 217 in the Hemagglutinin Glycoprotein Is a Key Mediator of Avian Influenza H7N9 Virus Antigenicity

Journal of Virology, 2019
Avian influenza H7N9 viruses circulating in poultry and wild birds continue to evolve and acquire important phenotypic changes. Mutations to the virus hemagglutinin (HA) glycoprotein can modulate virus antigenicity and facilitate virus escape from natural or vaccine-induced immunity.
Pengxiang Chang, Joshua E. Sealy, Jean-Remy Sadeyen, Munir Iqbal   +3 more
openaire   +2 more sources

DNA Nanostructure‐Templated Multivalency Enables Broad‐Spectrum Virus Inhibition

Advanced Science, EarlyView.
A honeycomb‐shaped DNA nanostructure is introduced that organizes nanobodies or aptamers into trimeric clusters mirroring the native hemagglutinin arrangement on influenza viruses. This geometry‐matched multivalency enhances binding avidity by up to 1000‐fold, resulting in robust, broad‐spectrum viral neutralization and a 30–55% improvement in host ...
Saurabh Umrao, Abhisek Dwivedy, Dhanush Gandavadi, Chi Chen, Lifeng Zhou, Jinwei Duan, Vineetha Mareddy, Ying Fang, Xing Wang   +8 more
wiley   +1 more source

MARPLE: A Proximity‐Triggered CRISPR‐Cas13 Platform for Ultrasensitive Antibody Detection

Advanced Science, EarlyView.
MARPLE is a modular CRISPR‐Cas13 immunoassay that uses antibody‐induced proximity to trigger a toehold‐exchange reaction, releasing an RNA activator for Cas13. This one‐pot, isothermal architecture enables ultrasensitive (femtomolar) and highly specific detection of diverse antibodies, including therapeutic, pathogen‐specific, and cancer‐associated ...
Elena Spezzani, Luca Capelli, Denise Di Lena, Alejandro Chamorro‐Garcia, Rudy Ippodrino, Alessandro Porchetta, Alessandro Bertucci   +6 more
wiley   +1 more source

Snapshot of an influenza virus glycoprotein fusion intermediate

Cell Reports, 2021
Summary: Enveloped virus entry requires the fusion of cellular and viral membranes, a process directed by their viral fusion glycoproteins. Our current knowledge of this process has been shaped by structural studies of the pre- and post-fusion ...
Vitor Hugo B. Serrão, Jonathan D. Cook, Jeffrey E. Lee   +2 more
doaj   +1 more source

Biomimetic Membrane Interface Technologies for Detection and Isolation of CTCs and EVs: Advances and Opportunities in Liquid Biopsy

Advanced Science, EarlyView.
Biomimetic membrane interface engineering constructs functionalized detection platforms by integrating natural cell membranes, synthetic lipids, or hybrid membranes. This strategy effectively reduces background interference and enables efficient target capture and analysis, showing broad applications in circulating tumor cell separation, extracellular ...
Duo Liu, Jie Yu, Jingxue Li, Yixue Chen, Mengle Peng, Yifan Xu, Yongjun Wu, Lihua Ding, Sitian He   +8 more
wiley   +1 more source

Amantadine selection of a mutant influenza virus containing an acid-stable hemagglutinin glycoprotein: evidence for virus-specific regulation of the pH of glycoprotein transport vesicles.

Proceedings of the National Academy of Sciences, 1991
Mutants of influenza Rostock virus (H7N1 subtype) were selected for resistance to amantadine hydrochloride at concentrations of the antiviral drug known to affect the function of the virus M2 transmembrane protein. Sequence analysis revealed that three mutants had no changes in M2 but contained a lysine to isoleucine substitution in the hemagglutinin ...
D A, Steinhauer, S A, Wharton, J J, Skehel, D C, Wiley, A J, Hay   +4 more
openaire   +3 more sources

Membralin Assembles a MAN1B1–VCP Complex to Target Foreign Glycoproteins from the Endoplasmic Reticulum to Lysosomes for Degradation

Advanced Science, EarlyView.
This study identifies Membralin as an ER‐phagy receptor that recruits MAN1B1 and VCP to form a selective ERLAD complex. By sensing dense N‐glycan clusters on viral fusion glycoproteins, this ubiquitin‐independent pathway directs SARS‐CoV‐2 spike, Ebola GP, influenza HA, and HIV‐1 Env to lysosomal degradation, thereby limiting viral infectivity ...
Jing Zhang, Xiaoran Lu, Sunan Li, Tao Wang, Iqbal Ahmad, Yong‐Hui Zheng   +5 more
wiley   +1 more source

Impact of host cell line adaptation on quasispecies composition and glycosylation of influenza A virus hemagglutinin. [PDF]

PLoS ONE, 2011
The genome of influenza A viruses is constantly changing (genetic drift) resulting in small, gradual changes in viral proteins. Alterations within antibody recognition sites of the viral membrane glycoproteins hemagglutinin (HA) and neuraminidase (NA ...
Jana Verena Roedig, Erdmann Rapp, Dirk Höper, Yvonne Genzel, Udo Reichl   +4 more
doaj   +1 more source