Abstract
Calreticulin (CRT), initially identified as a ubiquitous calcium-binding protein in the endoplasmic reticulum, has emerged as a multifunctional protein with roles in calcium homeostasis, molecular chaperoning and cell adhesion. Emerging evidence suggests its involvement in tumorigenesis facilitating proliferation, migration, and adhesion. CRT translocated to the cell surface (ecto-CRT) serves as a phagocytic signal for immunogenic cell death (ICD) mediated through dendritic cells (DCs) and cytotoxic T-cell activation thereby making tumors susceptible to immunotherapy-based anti-cancer strategies. CRT is now regarded as one of the most potent danger-associated molecular patterns (DAMPs) with the ecto-CRT triggering restoration of homeostasis by immune stimulation. A recently identified novel transacetylase activity of CRT adds a new dimension to its multi-faceted involvement in cancer by virtue of polyphenolic acetates (PA): CRT transacetylase (CRTase) system which results in hyperacetylation of target proteins, thereby mimicking the effects of Histone deacetylase inhibitors (HDACi). Since protein acetylation is one of the crucial post-translational modifications (PTMs) influencing the epigenetic regulation and signal transduction, CRT can be a potential target for developing anticancer therapeutics and preventive strategies by employing pharmacologically compatible semi-synthetic acetyl donors like polyphenolic acetates and other agents.
Keywords: Calreticulin, immunogenic cell death, danger-associated molecular patterns, protein acetylation, polyphenolic acetates, calreticulin transacetylase, cancer therapy.
Current Protein & Peptide Science
Title:Emerging Roles of Calreticulin in Cancer: Implications for Therapy
Volume: 19 Issue: 4
Author(s): Kavya Venkateswaran, Amit Verma, Anant Narayan Bhatt, Anju Shrivastava, Kailash Manda, Hanumantharao G. Raj, Ashok Prasad, Christophe Len, Virinder S. Parmar and Bilikere S. Dwarakanath*
Affiliation:
- Central Research Facility, Sri Ramachandra University, Porur, Chennai 600116,India
Keywords: Calreticulin, immunogenic cell death, danger-associated molecular patterns, protein acetylation, polyphenolic acetates, calreticulin transacetylase, cancer therapy.
Abstract: Calreticulin (CRT), initially identified as a ubiquitous calcium-binding protein in the endoplasmic reticulum, has emerged as a multifunctional protein with roles in calcium homeostasis, molecular chaperoning and cell adhesion. Emerging evidence suggests its involvement in tumorigenesis facilitating proliferation, migration, and adhesion. CRT translocated to the cell surface (ecto-CRT) serves as a phagocytic signal for immunogenic cell death (ICD) mediated through dendritic cells (DCs) and cytotoxic T-cell activation thereby making tumors susceptible to immunotherapy-based anti-cancer strategies. CRT is now regarded as one of the most potent danger-associated molecular patterns (DAMPs) with the ecto-CRT triggering restoration of homeostasis by immune stimulation. A recently identified novel transacetylase activity of CRT adds a new dimension to its multi-faceted involvement in cancer by virtue of polyphenolic acetates (PA): CRT transacetylase (CRTase) system which results in hyperacetylation of target proteins, thereby mimicking the effects of Histone deacetylase inhibitors (HDACi). Since protein acetylation is one of the crucial post-translational modifications (PTMs) influencing the epigenetic regulation and signal transduction, CRT can be a potential target for developing anticancer therapeutics and preventive strategies by employing pharmacologically compatible semi-synthetic acetyl donors like polyphenolic acetates and other agents.
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Venkateswaran Kavya , Verma Amit , Bhatt Narayan Anant , Shrivastava Anju , Manda Kailash , Raj G. Hanumantharao , Prasad Ashok , Len Christophe , Parmar S. Virinder and Dwarakanath S. Bilikere *, Emerging Roles of Calreticulin in Cancer: Implications for Therapy, Current Protein & Peptide Science 2018; 19 (4) . https://dx.doi.org/10.2174/1389203718666170111123253
DOI https://dx.doi.org/10.2174/1389203718666170111123253 |
Print ISSN 1389-2037 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5550 |
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