Results 101 to 110 of about 35,642 (231)

ER stress-induced eIF2-alpha phosphorylation underlies sensitivity of striatal neurons to pathogenic huntingtin.

PLoS ONE, 2014
A hallmark of Huntington's disease is the pronounced sensitivity of striatal neurons to polyglutamine-expanded huntingtin expression. Here we show that cultured striatal cells and murine brain striatum have remarkably low levels of phosphorylation of ...
Julia Leitman, Boaz Barak, Ron Benyair, Marina Shenkman, Uri Ashery, F Ulrich Hartl, Gerardo Z Lederkremer   +6 more
doaj   +1 more source

The ribosome‐associated complex regulates cytosolic translation upon mitoprotein‐induced stress

The FEBS Journal, EarlyView.
Defects in mitochondrial protein import trigger a stress response. The contribution of translation regulation to such a response is only partially understood. We demonstrate that the deletion of mitochondrial surface proteins (TOM70/TOM71) leads to defects in mitochondrial biogenesis and slow growth.
Jiaxin Qian, Annika Nutz, Katja Hansen, Lea Bertgen, Mirita Franz‐Wachtel, Boris Macek, Johannes M. Herrmann, Doron Rapaport   +7 more
wiley   +1 more source

ER proteostasis meets mitochondrial function: contact sites as hubs of communication and therapeutic targets

The FEBS Journal, EarlyView.
Proteostasis ensures proper protein folding, modification, and degradation, while its impairment triggers ER stress. Chronic ER stress and maladaptive UPR via the CHOP–ERO1 axis remodel ERMCs, altering calcium signaling and mitochondrial metabolism.
Giorgia Maria Renna, Alessandro Cherubini, Ersilia Varone, Serena Germani, Alice Marrazza, Ester Zito   +5 more
wiley   +1 more source

Activation of the PERK/eIF2α axis is a pivotal prerequisite of taxanes to cancer cell apoptosis and renders synergism to overcome paclitaxel resistance in breast cancer cells

Cancer Cell International
Background Microtubule polymerization is usually considered as the upstream of apoptotic cell death induced by taxanes, but recently published studies provide more insights into the mechanisms responsible for the antineoplastic effect of taxanes. In this
Wanhua Cai, Dade Rong, Jiayu Ding, Xiaomei Zhang, Yuwei Wang, Ying Fang, Jing Xiao, Shulan Yang, Haihe Wang   +8 more
doaj   +1 more source

Betacoronaviruses Differentially Activate the Integrated Stress Response to Optimize Viral Replication in Lung-Derived Cell Lines

Viruses
The betacoronavirus genus contains five of the seven human coronaviruses, making it a particularly critical area of research to prepare for future viral emergence. We utilized three human betacoronaviruses, one from each subgenus—HCoV-OC43 (embecovirus),
David M. Renner, Nicholas A. Parenti, Nicole Bracci, Susan R. Weiss   +3 more
doaj   +1 more source

Eukaryotic initiation factor 2α phosphorylation is required for B-cell maturation and function in mice

Haematologica, 2011
Background The control of translation initiation is a crucial component in the regulation of gene expression. The eukaryotic initiation factor 2α (eIF2α) mediates binding of the initiator transfer-messenger-RNA to the AUG initiation codon, and thus ...
Nina Mielke, Rolf Schwarzer, Cornelis F. Calkhoven, Randal J. Kaufman, Bernd Dörken, Achim Leutz, Franziska Jundt   +6 more
doaj   +1 more source

Proteostasis of organelles in aging and disease

The FEBS Journal, EarlyView.
Cells rely on regulated proteostasis mechanisms to keep their internal compartments functioning properly. When these mechanisms fail, damaged proteins accumulate, disrupting organelles, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi, and lysosomes, as well as membraneless organelles, such as stress granules, processing bodies, the ...
Yara Nabawi, Cansu Doğan, Dunja Petrović, Gülce Perçin, Seda Koyuncu, David Vilchez   +5 more
wiley   +1 more source

GCN2 in proteostasis: structural logic, signalling networks and disease

The FEBS Journal, EarlyView.
Threats to protein synthesis activate the kinase GCN2, initiating the integrated stress response (ISR). GCN2 is triggered by stalled ribosomes and uncharged tRNAs, which accumulate when amino acids are scarce. The ISR adjusts cellular physiology by promoting redox balance, protein quality control, and mitochondrial optimisation.
JiaYi Zhu, Stefan J. Marciniak
wiley   +1 more source

Translational Control during Endoplasmic Reticulum Stress beyond Phosphorylation of the Translation Initiation Factor eIF2α [PDF]

, 2014
Bo-Jhih Guan, Dawid Krokowski, Mithu Majumder, Christine Schmotzer, Scot R. Kimball, William C. Merrick, Antonis E. Koromilas, Maria Hatzoglou   +7 more
openalex   +1 more source

The role of constitutive nitric‐oxide synthase in regulation of IKKα after ultraviolet irradiation

Photochemistry and Photobiology, EarlyView.
cNOS enhances IKKα expression following UVB exposure by promoting promoter activation, transcriptional elongation, and Ets‐1 stabilization. These actions sustain IKKα levels, reduce UV‐induced skin carcinogenesis, and highlight cNOS as a key protective factor against solar UV damage.
Yuxi Zhou, Lingying Tong, Bernardo Bastidas, Tao Liu, Madison Wright, Muxiang Zhou, Shiyong Wu   +6 more
wiley   +1 more source