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Rasool RU, Nayak D, Chakraborty S, Faheem MM, Rah B, Mahajan P, Gopinath V, Katoch A, Iqra Z, Yousuf SK, Mukherjee D, Kumar LD, Nargotra A, Goswami A. AKT is indispensable for coordinating Par-4/JNK cross talk in p21 downmodulation during ER stress. Oncogenesis 2017; 6:e341. [PMID: 28530706 PMCID: PMC5523074 DOI: 10.1038/oncsis.2017.41] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/22/2017] [Accepted: 04/17/2017] [Indexed: 12/25/2022] Open
Abstract
The double-edged role of p21 to command survival and apoptosis is emerging. The current investigation highlights ER stress-mediated JNK activation that plausibly triggers cell death by attenuating endogenous p21 level. Here, we demonstrated that ER stress activator 3-AWA diminishes the p21 levels in cancer cells by averting the senescent phenotype to commence G2/M arrest. In essence, the deceleration in p21 level occurs through ER stress/JNK/Caspase-3 axis via activation/induction of proapoptotic Par-4 and inhibition of AKT. The molecular dynamics studies identified important interactions, which may be responsible for the AKT inhibition and efficacy of 3-AWA towards AKT binding pocket. Interestingly, the p21 deceleration was rescued by incubating the cells with 3-AWA in the presence of an ER stress inhibitor, Salubrinal. Furthermore, we demonstrated that p21 expression decreases solitarily in Par-4+/+ MEFs; albeit, ER stress-induced JNK activation was observed in both Par-4+/+ and Par-4−/− MEFs. Par-4 knockdown or overexpression studies established that ectopic Par-4 along with ER stress are not sufficient to downregulate p21 in PC-3 cells but are adequate for DU-145 cells and that the ER stress inflicted activation of JNK, inhibition of AKT and Par-4 induction are all crucial to p21 downmodulation by 3-AWA. By using isogenic cell lines, such as HCT-116 p53+/+ and HCT-116 p53−/−, we found that deceleration in p21 expression due to ER stress is p53 independent. Moreover, in orthotopic carcinogen-induced rat colorectal carcinoma model, we found that 3-AWA inhibits colorectal tumor growth and formation of colorectal polyps at a tolerable dose, similar to the first-line drug for colorectal cancer-5-fluorouracil.
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Affiliation(s)
- R U Rasool
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - D Nayak
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - S Chakraborty
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - M M Faheem
- Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - B Rah
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center (UNMC), Omaha, NE, USA
| | - P Mahajan
- Discovery Informatics Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - V Gopinath
- Cancer Biology Division, CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - A Katoch
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Z Iqra
- Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - S K Yousuf
- Natural Product Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - D Mukherjee
- Natural Product Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - L D Kumar
- Cancer Biology Division, CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - A Nargotra
- Discovery Informatics Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - A Goswami
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
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Weston CR, Davis RJ. The JNK signal transduction pathway. Curr Opin Cell Biol 2007; 19:142-9. [PMID: 17303404 DOI: 10.1016/j.ceb.2007.02.001] [Citation(s) in RCA: 793] [Impact Index Per Article: 46.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2006] [Accepted: 02/05/2007] [Indexed: 11/18/2022]
Abstract
The c-Jun NH(2)-terminal kinases (JNKs) are an evolutionarily conserved sub-group of mitogen-activated protein (MAP) kinases. Recent studies have improved our understanding of the physiological function of the JNK pathway. Roles of novel molecules that participate in the JNK pathway have been defined and new insight into the role of JNK in survival signaling, cell death, cancer and diabetes has been achieved.
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Affiliation(s)
- Claire R Weston
- Howard Hughes Medical Institute and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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