Hsp70 is an anti-apoptotic protein over-expressed in breast, lung, rectum, endometrial and bladder cancers. In this study, we investigated the impact of Hsp70 protein expression, and its close family member, Hsc70, on breast cancer cell viability and on the activity of the Hsp90/Hsp70 chaperone complex, a complex whose activity is important for the survival of cancer cells and tumours. The simu...

The role of heat shock protein 70 (Hsp70) in virus replication has been discussed for many viruses. The known suppressive role of Hsp70 in influenza virus replication is based on studies conducted in cells with various Hsp70 expression levels. In this study, we determined the role of Hsp70 in influenza virus replication in HeLa and HEK293T cells, which express Hsp70 constitutively. Co-immunopre...

Hsp70 chaperone is known to stimulate anti-tumour immunity in a variety of cancer models. Here we demonstrated that the addition of purified recombinant Hsp70 to the culture medium facilitated cancer cell cytolysis by lymphocytes. Importantly, exogenous Hsp70 triggered secretion of the intracellular Hsp70 to a cell surface and extracellular milieu, which played a role in cytolysis because down-...

The import of preproteins into mitochondria involves translocation of the polypeptide chains through putative channels in the outer and inner membranes. Preprotein-binding proteins are needed to drive the unidirectional translocation of the precursor polypeptides. Two of these preprotein-binding proteins are the peripheral inner membrane protein MIM44 and the matrix heat shock protein hsp70. We...

Heat shock preconditioning can enhance locomotor and synaptic performance during subsequent hyperthermia. The molecular basis underlying this neural phenotypic modification is largely unknown. Here we report that directing the expression of the 70 kDa heat shock protein (HSP70) to motoneurons protected larval locomotor activity of Drosophila. Tissue-specific expression showed that motoneurons w...

ABSTRACT In this study, immunohistochemistry and real-time fluorescent-based quantitative PCR were used to evaluate the expression of heat shock protein (HSP) 60, HSP70, HSP90 in small intestine Wenchang chicks. Compared with control group (CK), positive HSP60 mRNA stress (HS) initially higher subsequently lower duodenum (p<0.01). HS jejunum, levels (p<0.01) was (p<0.05). Whereas ileum (p<0.05)...

Transcriptional regulation of the human hsp70 gene in response to heat shock and other forms of physiological stress occurs through the activation of heat shock transcription factor (HSF). Exposure of cells to a heat shock temperature of 42 degrees C results in transient activation of HSF; its DNA-binding activity increases rapidly, plateaus, and attenuates, during which the intracellular level...

THE MEMBERS OFTHE HSP70 FAMILY ...................................••......................................... 298 Unfolding Is Required for Membrane Translocation of Proteins ............................... 299 Cytoso/ic Hsp70 Stabilizes Precursor Proteins for Translocation.............................. 300 Organellar Hsp70 in Protein Translocation and Folding .....................................

Leishmania infantum HSP70 has been described as an immunodominant antigen in both humans and dogs suffering from visceral leishmaniasis. In this study, we used L. infantum HSP70 fused to Escherichia coli maltose-binding protein (MBP), as the reporter protein, to analyze the influence of HSP70 on the immunogenicity of MBP in BALB/c mice. Plasmids were constructed to produce the three recombinant...