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2015 ; 2015
(ä): 970242
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HSP90 and HSP70: Implication in Inflammation Processes and Therapeutic Approaches
for Myeloproliferative Neoplasms
#MMPMID26549943
Sevin M
; Girodon F
; Garrido C
; de Thonel A
Mediators Inflamm
2015[]; 2015
(ä): 970242
PMID26549943
show ga
Myeloproliferative neoplasms (MPN) are clonal stem cell disorders that lead to
the excessive production of one or more blood cell lineages. It has been reported
that, in most MPN, inflammatory cytokines are frequently increased, indicating
that inflammation plays a crucial role in these disorders. Heat shock proteins
(HSP) are induced in response to many stressful conditions from heat shock to
hypoxia and inflammation. Besides their chaperone and cytoprotective functions,
HSPs are key players during inflammation, hence the term "chaperokine." Through
their chaperone activity, HSP90, a stabilizer of many oncogenes (e.g., JAK2), and
HSP70, a powerful antiapoptotic chaperone, tightly regulate Nuclear Factor-kappa
B signalling, a critical pathway in mediating inflammatory responses. In light of
this potential, several HSP90 inhibitors have been generated as anticancer agents
able to degrade oncogenes. As it turns out, however, these drugs are also potent
inhibitors of the inflammatory response in various diseases. Given the chaperone
potential of HSP70 and the fact that HSP90 inhibitors induce HSP70, interest in
HSP70 inhibitors is also increasing. Here, we focus on the implication of HSP90
and HSP70 in inflammatory responses and on the emergence of new therapeutic
approaches in MPN based on HSP inhibitors.