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Suleiman M, Al Najjar A, Zakaria ZZ, Ahmed R, Yalcin HC, Korashy HM, Uddin S, Riaz S, Abdulrahman N, Mraiche F. The Role of p90 Ribosomal S6 Kinase (RSK) in Tyrosine Kinase Inhibitor (TKI)-Induced Cardiotoxicity. J Cardiovasc Transl Res 2024; 17:334-344. [PMID: 37725271 DOI: 10.1007/s12265-023-10431-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/22/2023] [Indexed: 09/21/2023]
Abstract
Targeted therapy, such as tyrosine kinase inhibitors (TKIs), has been approved to manage various cancer types. However, TKI-induced cardiotoxicity is a limiting factor for their use. This issue has raised the need for investigating potential cardioprotective techniques to be combined with TKIs. Ribosomal S6-kinases (RSKs) are a downstream effector of the mitogen-activated-protein-kinase (MAPK) pathway; specific RSK isoforms, such as RSK1 and RSK2, have been expressed in cancer cells, in which they increase tumour proliferation. Selective targeting of those isoforms would result in tumour suppression. Moreover, activation of RSKs expressed in the heart has resulted in cardiac hypertrophy and arrhythmia; thus, inhibiting RSKs would result in cardio-protection. This review article presents an overview of the usefulness of RSK inhibitors that can be novel agents to be assessed in future research for their effect in reducing cancer proliferation, as well as protecting the heart from cardiotoxicity induced by TKIs.
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Affiliation(s)
- Muna Suleiman
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Afnan Al Najjar
- National Center for Cancer Care and Research, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
| | - Zain Z Zakaria
- Medical and Health Sciences, Qatar University, PO Box 2713, Doha, Qatar
| | - Rashid Ahmed
- Department of Biotechnology, Faculty of Science, Mirpur University of Science and Technology, Mirpur, 10250, AJK, Pakistan
| | - Huseyin C Yalcin
- Biomedical Research Centre (BRC), Qatar University, PO Box 2713, Doha, Qatar
- College of Health Sciences, QU-Health, Qatar University, PO Box 2713, Doha, Qatar
| | - Hesham M Korashy
- National Center for Cancer Care and Research, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
| | - Shahab Uddin
- Translational Research Institute and Dermatology Institute, Academic Health System, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
| | - Sadaf Riaz
- Pharmacy Department, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar
| | - Nabeel Abdulrahman
- College of Health Sciences, QU-Health, Qatar University, PO Box 2713, Doha, Qatar
| | - Fatima Mraiche
- National Center for Cancer Care and Research, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar.
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada.
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Wright EB, Lannigan DA. Therapeutic targeting of p90 ribosomal S6 kinase. Front Cell Dev Biol 2023; 11:1297292. [PMID: 38169775 PMCID: PMC10758423 DOI: 10.3389/fcell.2023.1297292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 12/04/2023] [Indexed: 01/05/2024] Open
Abstract
The Serine/Threonine protein kinase family, p90 ribosomal S6 kinases (RSK) are downstream effectors of extracellular signal regulated kinase 1/2 (ERK1/2) and are activated in response to tyrosine kinase receptor or G-protein coupled receptor signaling. RSK contains two distinct kinase domains, an N-terminal kinase (NTKD) and a C-terminal kinase (CTKD). The sole function of the CTKD is to aid in the activation of the NTKD, which is responsible for substrate phosphorylation. RSK regulates various homeostatic processes including those involved in transcription, translation and ribosome biogenesis, proliferation and survival, cytoskeleton, nutrient sensing, excitation and inflammation. RSK also acts as a major negative regulator of ERK1/2 signaling. RSK is associated with numerous cancers and has been primarily studied in the context of transformation and metastasis. The development of specific RSK inhibitors as cancer therapeutics has lagged behind that of other members of the mitogen-activated protein kinase signaling pathway. Importantly, a pan-RSK inhibitor, PMD-026, is currently in phase I/1b clinical trials for metastatic breast cancer. However, there are four members of the RSK family, which have overlapping and distinct functions that can vary in a tissue specific manner. Thus, a problem for transitioning a RSK inhibitor to the clinic may be the necessity to develop isoform specific inhibitors, which will be challenging as the NTKDs are very similar to each other. CTKD inhibitors have limited use as therapeutics as they are not able to inhibit the activity of the NTKD but could be used in the development of proteolysis-targeting chimeras.
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Affiliation(s)
- Eric B. Wright
- Department Biomedical Engineering, Vanderbilt University, Nashville, TN, United States
| | - Deborah A. Lannigan
- Department Biomedical Engineering, Vanderbilt University, Nashville, TN, United States
- Department Pathology, Vanderbilt University Medical Center, Nashville, TN, United States
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