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Albassam H, Ladin DA, Elhassanny A, Burns C, Van Dross-Anderson R. Apoptosis mechanisms induced by 15d-PMJ 2 in HCT116 colon cancer cells: insights into CHOP10/TRB3/Akt signaling. Front Pharmacol 2023; 14:1283677. [PMID: 38026967 PMCID: PMC10652392 DOI: 10.3389/fphar.2023.1283677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
Agents that stimulate the endoplasmic reticulum (ER) stress pathway are being exploited pharmacologically to induce cancer cell death. Cytotoxic ER stress is typically regulated by the transcription factor, C/EBP homologous protein 10 (CHOP10). Products of CHOP10 transcription include the pro-apoptotic proteins: ER oxidoreductase 1α (ERO1α), death receptor-5 (DR5), and tribbles-related protein 3 (TRB3). Our previous findings showed cell death induced by 15-deoxy- Δ12,14 prostamide J2 (15d-PMJ2) occurred in an ER stress-dependent manner. However, the pathway by which 15d-PMJ2 regulates ER stress-mediated death downstream of CHOP10 has not been identified. Our results demonstrate 5 µM 15d-PMJ2 increased CHOP10 expression and apoptosis in HCT116 colon cancer cells. In cells treated with pharmacological inhibitors of ER stress, 15d-PMJ2-induced apoptosis was reliant upon the ER stress pathway. To investigate the role of CHOP10 and its transcriptional products in apoptosis, genetic deletion of CHOP10 (CHOP10-KO) was performed using the CRISPR/Cas9 system. The apoptotic action of 15d-PMJ2 was blunted in cells lacking CHOP10 expression. The deletion of CHOP10 reduced the expression of DR5, ERO1α, and TRB3 although only the expression of TRB3 was significantly reduced. Therefore, we overexpressed TRB3 in CHOP10-KO cells and observed that the activation of Akt was inhibited and 15d-PMJ2-induced apoptosis was restored. Thus, a mechanism of apoptosis elicited by 15d-PMJ2 includes the stimulation of CHOP10/TRB3/Akt inhibition. Given the important role these signaling molecules play in cancer cell fate, 15d-PMJ2 may be an effective inducer of apoptosis in cancer cells.
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Affiliation(s)
- Hussam Albassam
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Daniel A. Ladin
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Ahmed Elhassanny
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
| | - Colin Burns
- Department of Chemistry, East Carolina University, Greenville, NC, United States
| | - Rukiyah Van Dross-Anderson
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
- Department of Chemistry, East Carolina University, Greenville, NC, United States
- Center for Health Disparities, East Carolina University, Greenville, NC, United States
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Cao Z, Liu Y, Chen S, Wang W, Yang Z, Chen Y, Jiao S, Huang W, Chen L, Sun L, Li Z, Zhang L. Discovery of novel carboxylesterase 2 inhibitors for the treatment of delayed diarrhea and ulcerative colitis. Biochem Pharmacol 2023; 215:115742. [PMID: 37567318 DOI: 10.1016/j.bcp.2023.115742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/06/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Human carboxylesterase 2 (hCES2) is an enzyme that metabolizes irinotecan to SN-38, a toxic metabolite considered a significant source of side effects (lethal delayed diarrhea). The hCES2 inhibitors could block the hydrolysis of irinotecan in the intestine and thus reduce the exposure of intestinal SN-38, which may alleviate irinotecan-associated diarrhea. However, existing hCES2 inhibitors (except loperamide) are not used in clinical applications due to lack of validity or acceptable safety. Therefore, developing more effective and safer drugs for treating delayed diarrhea is urgently needed. This study identified a lead compound 1 with a novel scaffold by high-throughput screening in our in-house library. After a comprehensive structure-activity relationship study, the optimal compound 24 was discovered as an efficient and highly selective hCES2 inhibitor (hCES2: IC50 = 6.72 μM; hCES1: IC50 > 100 μM). Further enzyme kinetics study indicated that compound 24 is a reversible inhibitor of hCES2 with competitive inhibition mode (Ki = 6.28 μM). The cell experiments showed that compound 24 could reduce the level of hCES2 in living cells (IC50 = 6.54 μM). The modeling study suggested that compound 24 fitted very well with the binding pocket of hCES2 by forming multiple interactions. Notably, compound 24 can effectively treat irinotecan-induced delayed diarrhea and DSS-induced ulcerative colitis, and its safety has also been verified in subtoxic studies. Based on the overall pharmacological and preliminary safety profiles, compound 24 is worthy of further evaluation as a novel agent for irinotecan-induced delayed diarrhea.
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Affiliation(s)
- Zhijun Cao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Laboratory of New Drug Discovery and Evaluation of the Guangdong Provincial Education Department, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Yuxia Liu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Siliang Chen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Wenxin Wang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Zhongcheng Yang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Ya Chen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Shixuan Jiao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Laboratory of New Drug Discovery and Evaluation of the Guangdong Provincial Education Department, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Wanqiu Huang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Laboratory of New Drug Discovery and Evaluation of the Guangdong Provincial Education Department, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Lianru Chen
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China
| | - Lidan Sun
- Department of Pharmaceutics, Jiaxing Key Laboratory for Photonanomedicine and Experimental Therapeutics, College of Medicine, Jiaxing University, Jiaxing, Zhejiang, PR China.
| | - Zheng Li
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Laboratory of New Drug Discovery and Evaluation of the Guangdong Provincial Education Department, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangdong Key Laboratory of Pharmaceutical Bioactive Substances, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, Guangzhou 510006, PR China.
| | - Luyong Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Center for Drug Research and Development, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Key Laboratory of New Drug Discovery and Evaluation of the Guangdong Provincial Education Department, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou 510006, PR China; Guangdong Key Laboratory of Pharmaceutical Bioactive Substances, Guangdong Pharmaceutical University, Guangzhou 510006, PR China.
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Vinothkumar K, Chanda S, Singh VK, Biswas S, Mohapatra S, Biswas G, Chakraborty S. EVI1 upregulates PTGS1 (COX1) and decreases the action of tyrosine kinase inhibitors (TKIs) in chronic myeloid leukemia cells. Int J Hematol 2023; 117:110-120. [PMID: 36282419 DOI: 10.1007/s12185-022-03465-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 09/29/2022] [Accepted: 10/02/2022] [Indexed: 01/11/2023]
Abstract
Tyrosine kinase inhibitors (TKIs) are highly effective in treating chronic myelogenous leukemia (CML). However, primary and acquired drug resistance to TKIs have been reported. In this study, we used RNA sequencing followed by RQ-PCR to show that the proto-oncogene EVI1 targets the drug-metabolizing gene PTGS1 in CML. The PTGS1 promoter element had an EVI1 binding site, and CHIP assay confirmed its presence. Data from a publicly available CML microarray dataset and an independent set of CML samples showed a significant positive correlation between EVI1 and PTGS1 expression in CML. Downregulation of EVI1 in K562 cells and subsequent treatment with TKIs resulted in a lower IC50 in the control cells. Furthermore, combined inhibition of BCR-ABL with imatinib and PTGS1 with FR122047 (PTGS1 inhibitor) synergistically reduced the viability of imatinib-resistant K562 cells. We conclude that elevated EVI1 expression contributes to TKIs resistance and that combined inhibition of PTGS1 and BCR-ABL may represent a novel therapeutic approach.
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MESH Headings
- Humans
- Apoptosis
- Cyclooxygenase 1/pharmacology
- Cyclooxygenase 1/therapeutic use
- Drug Resistance, Neoplasm/genetics
- Fusion Proteins, bcr-abl
- Imatinib Mesylate/pharmacology
- Imatinib Mesylate/therapeutic use
- K562 Cells
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Protein Kinase Inhibitors/pharmacology
- Protein Kinase Inhibitors/therapeutic use
- Tyrosine Protein Kinase Inhibitors
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Affiliation(s)
- Kittappa Vinothkumar
- Cancer Biology Group, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, India
| | - Sayantan Chanda
- Cancer Biology Group, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, India
- Regional Centre for Biotechnology, Faridabad, Haryana, India
| | - Vivek Kumar Singh
- Cancer Biology Group, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, India
| | - Sutapa Biswas
- Sparsh Hospital and Critical Care, Bhubaneswar, India
| | - Sonali Mohapatra
- Department of Medical Oncology/Hematology, All India Institute of Medical Sciences, Bhubaneswar, India
| | | | - Soumen Chakraborty
- Cancer Biology Group, Institute of Life Sciences, Nalco Square, Bhubaneswar, Odisha, India.
- Regional Centre for Biotechnology, Faridabad, Haryana, India.
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