Proteins, under conditions of cellular stress, typically tend to unfold and form lethal aggregates leading neurological diseases like Parkinson's Alzheimer's. A clear understanding the that favor dis-aggregation restore cell its healthy state after they have been stressed is therefore important in dealing with these diseases. The heat shock response (HSR) mechanism a signaling network deals und...

Normal bone marrow progenitors and some leukemic cells develop only a limited amount of thermotolerance. Further, once developed, thermotolerance decays at a faster rate than that normally observed in cells of nonhemopoietic origin. Thermotolerance induction and maintenance correlates with reduced levels of expression of various M(r) 70,000 heat shock proteins (HSP-70) mRNAs after heat shock. W...

Glutamine (GLN) has been shown to protect cells, tissues, and whole organisms from stress and injury. Enhanced expression of heat shock protein (HSP) has been hypothesized to be responsible for this protection. To date, there are no clear mechanistic data confirming this relationship. This study tested the hypothesis that GLN-mediated activation of the HSP pathway via heat shock factor-1 (HSF-1...

Exposure of chicken cells grown in tissue culture to heat shock or sodium arsenite results in a dramatic increase in the synthesis of three major polypeptides with molecular weights of 83,000 (HSP 83), 68,000 (HSP 68; referred to here as "thermin"), and 25,000 (HSP 25). Incubation of BHK-21 or HeLa cells under the same conditions results in induction of HSP 68 and a 66,000-dalton polypeptide (H...

This study evaluated associations of heat shock proteins (HSP) and an oxidative stress protein, protein deglycase (DJ1), with beef quality tenderness. Samples from the longissimus thoracis (N = 99) were collected pre-rigor (day 0) after 14-d aging. Warner-Bratzler shear force (WBSF), myofibrillar fragmentation index (MFI), a trained sensory panel used to determine meat quality. Protein abundanc...

Extracellular HSP90 associated with Ag peptides have been demonstrated to efficiently cross-prime T cells, following internal-ization by dendritic cells (DCs). In addition, the nature of cell-associated Ags required for cross-priming is implicated as peptides and proteins chaperoned by heat shock protein (HSP). However, the role of endogenous HSP in DCs during cross-presentation remains elusive...

The book Heat Shock Proteins (HSP) in Cellular Communication and Signaling Volume 26 provides the most comprehensive highlight insight of expression, function therapeutic activity HSP signaling pathways. Using an integrative approach to understanding various HSP-mediated pathways response a variety stressors including hyperthermia, or metabolic changes produced by physical exercise psychologica...

Heat stress due to high environmental temperature negatively influences animal performances. To better understand the biological impact of heat stress, laying broiler breeder chickens were subjected either to acute (step-wisely increasing temperature from 21 to 35°C within 24 hours) or chronic (32°C for 8 weeks) high temperature exposure. High temperature challenges significantly elevated body ...

Mammalian cells constitutively express a cytosolic and nuclear form of heat shock protein (hsp) 70, referred to here as hsp 73. In response to heat shock or other metabolic insults, increased expression of another cytosolic and nuclear form of hsp 70, hsp 72, is observed. The constitutively expressed hsp 73, and stress-inducible hsp 72, are highly related proteins. Still unclear, however, is ex...

The characteristics of heat shock protein(s) (HSP) and thermotolerance induction were examined in Chinese hamster ovary cells following two diverse nonlethal heat shocks: a continuous 41 degree exposure and a 45 degree, 5-min exposure. While induction of both HSP and thermotolerance were observed to initially develop simultaneously, a significant period was observed during which HSP induction w...