Heat shock proteins as hallmarks of cancer: insights from molecular mechanisms to therapeutic strategies.

Heat shock proteins are essential molecular chaperones that play crucial roles in stabilizing protein structures, facilitating the repair or degradation of damaged proteins, and maintaining proteostasis and cellular functions. Extensive research has demonstrated that heat shock proteins are highly expressed in cancers and closely associated with tumorigenesis and progression. The "Hallmarks of Cancer" are the core features of cancer biology that collectively define a series of functional characteristics acquired by cells as they transition from a normal state to a state of tumor growth, including sustained proliferative signaling, evasion of growth suppressors, resistance to cell death, enabled replicative immortality, the induction of angiogenesis, and the activation of invasion and metastasis. The pivotal roles of heat shock proteins in modulating the hallmarks of cancer through the activation or inhibition of various signaling pathways has been well documented. Therefore, this review provides an overview of the roles of heat shock proteins in vital biological processes from the perspective of the hallmarks of cancer and summarizes the small-molecule inhibitors that target heat shock proteins to regulate various cancer hallmarks. Moreover, we further discuss combination therapy strategies involving heat shock proteins and promising dual-target inhibitors to highlight the potential of targeting heat shock proteins for cancer treatment. In summary, this review highlights how targeting heat shock proteins could regulate the hallmarks of cancer, which will provide valuable information to better elucidate and understand the roles of heat shock proteins in oncology and the mechanisms of cancer occurrence and development and aid in the development of more efficacious and less toxic novel anticancer agents.

Zuo WF ，Pang Q ，Zhu X ，Yang QQ ，Zhao Q ，He G ，Han B ，Huang W ... -  《Journal of Hematology & Oncology》

Chaperoning the Cancer: The Proteostatic Functions of the Heat Shock Proteins in Cancer.

Protein homeostasis (proteostasis) is vital for the survival of cells in physiological and pathological conditions. Particularly, cancer cells are in constant state of cellular stress due to rapid proliferation and decreased quality control in proteosynthesis and therefore, are exceedingly dependent on the homeostasis pathways. Among the complex biological mechanisms regulating proteostasis are the highly conserved molecular chaperones, heat shock proteins (HSPs). HSPs assist cell survival by catalysing the proper folding of proteins, modulation of the apoptotic machinery and finally regulating the protein degradation machinery, providing either the stability or the degradation of selected proteins under stress conditions. Inevitably, HSPs are upregulated in malignancies and participate in different hallmarks of cancer, with indispensable roles in the onset and progression of the disease. Moreover, high levels of HSPs contribute to poor prognosis and treatment resistance in various cancers. Therefore these molecular chaperones present as attractive targets for anti-cancer therapy. This review describes how HSPs regulate different hallmarks of cancer and provides an overview on the most relevant patents which have recently appeared in the literature. The patents were extracted from Google Patents (2012-2016) while the clinical trial results were mined from www.clinicaltrial.gov. Review of literature shows that the proteostatic functions of HSPs can modify different hallmarks of cancer. Moreover, targeting HSPs (notably HSP27, HSP70 and HSP90) exhibited positive results in clinical trials so far. However, more studies should be designed to optimize the efficacy of mono or combination therapy in various malignancies.

Vahid S ，Thaper D ，Zoubeidi A 《-》

The therapeutic target Hsp90 and cancer hallmarks.

Miyata Y ，Nakamoto H ，Neckers L 《-》

Characterization of the dual functional effects of heat shock proteins (HSPs) in cancer hallmarks to aid development of HSP inhibitors.

Zhang Z ，Jing J ，Ye Y ，Chen Z ，Jing Y ，Li S ，Hong W ，Ruan H ，Liu Y ，Hu Q ，Wang J ，Li W ，Lin C ，Diao L ，Zhou Y ，Han L ... -  《Genome Medicine》

Heat shock proteins in cancer: targeting the 'chaperones'.

Nahleh Z ，Tfayli A ，Najm A ，El Sayed A ，Nahle Z ... -  《-》