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Sun L, Ji WX, Li Y, Li ZL, Duan CC, Xia BR, Xiao L. The PAPSS1 gene is a modulator of response to cisplatin by regulating estrogen receptor alpha signaling activity in ovarian cancer cells. J Ovarian Res 2023; 16:187. [PMID: 37684671 PMCID: PMC10486135 DOI: 10.1186/s13048-023-01262-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 08/16/2023] [Indexed: 09/10/2023] Open
Abstract
BACKGROUND Cancer cells may develop resistance to cisplatin by various mechanisms. Yet, the exact mechanism of cisplatin in ovarian cancer remains unclear. Recent studies have shown that 3'-phospoadenosine 5'-phosphosulfate synthase 1 (PAPSS1) inhibition combined with low-dose cisplatin increases DNA damage. The aim of this study was to determine the value of targeting PAPSS1 as a cisplatin modulator in epithelial ovarian cancer (EOC). RESULTS Increased expression of PAPSS1 was observed in both EOC cells and tissues. Also, its higher nuclear expression was distinctly associated with FIGO (The International Federation of Gynecology and Obstetrics) stage, histological subtype, metastasis, and recurrence. Down-regulation of the PAPSS1 gene increased the cisplatin sensitivity of EOC in vitro and in vivo. Expression of PAPSS1 was negatively correlated with estrogen receptor α (ERα) in EOC. Also, low nuclear PAPSS1 and high nuclear ERα expression in EOC were associated with longer overall survival and progression-free survival in all ovarian cancer and ovarian cancer patients who received platinum-based chemotherapy. PAPSS1 silencing increased the activity of ERα-signaling in EOC cells, thus sensitizing tumors to cisplatin. CONCLUSIONS These findings characterize a novel interplay between PAPSS1-mediated sulfation and ERα-signaling in EOC cisplatin resistance. PAPSS1 may be exploited as a cisplatin-sensitizing therapeutic target.
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Affiliation(s)
- Lei Sun
- Department of Obstetrics & Gynecology, the First Affiliated Hospital, Anhui Medical University, Hefei, 230020, Anhui, P. R. China
| | - Wei-Xue Ji
- Department of Obstetrics & Gynecology, the First Affiliated Hospital, Anhui Medical University, Hefei, 230020, Anhui, P. R. China
| | - Yan Li
- Department of Pathology and Pathophysiology, School of Medicine, Jianghan University, Wuhan, 430056, Hubei, P. R. China
| | - Ze-Lian Li
- Department of Obstetrics & Gynecology, the First Affiliated Hospital, Anhui Medical University, Hefei, 230020, Anhui, P. R. China
| | - Can-Can Duan
- Department of Obstetrics & Gynecology, the First Affiliated Hospital, Anhui Medical University, Hefei, 230020, Anhui, P. R. China
| | - Bai-Rong Xia
- Department of Gynecology Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230031, Anhui, P. R. China.
| | - Lan Xiao
- Department of Obstetrics & Gynecology, the First Affiliated Hospital, Anhui Medical University, Hefei, 230020, Anhui, P. R. China.
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Leung AWY, Dragowska WH, Ricaurte D, Kwok B, Mathew V, Roosendaal J, Ahluwalia A, Warburton C, Laskin JJ, Stirling PC, Qadir MA, Bally MB. 3'-Phosphoadenosine 5'-phosphosulfate synthase 1 ( PAPSS1) knockdown sensitizes non-small cell lung cancer cells to DNA damaging agents. Oncotarget 2016. [PMID: 26220590 PMCID: PMC4627299 DOI: 10.18632/oncotarget.3635] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Standard treatment for advanced non-small cell lung cancer (NSCLC) with no known driver mutation is platinum-based chemotherapy, which has a response rate of only 30–33%. Through an siRNA screen, 3′-phosphoadenosine 5′-phosphosulfate (PAPS) synthase 1 (PAPSS1), an enzyme that synthesizes the biologically active form of sulfate PAPS, was identified as a novel platinum-sensitizing target in NSCLC cells. PAPSS1 knockdown in combination with low-dose (IC10) cisplatin reduces clonogenicity of NSCLC cells by 98.7% (p < 0.001), increases DNA damage, and induces G1/S phase cell cycle arrest and apoptosis. PAPSS1 silencing also sensitized NSCLC cells to other DNA crosslinking agents, radiation, and topoisomerase I inhibitors, but not topoisomerase II inhibitors. Chemo-sensitization was not observed in normal epithelial cells. Knocking out the PAPSS1 homolog did not sensitize yeast to cisplatin, suggesting that sulfate bioavailability for amino acid synthesis is not the cause of sensitization to DNA damaging agents. Rather, sensitization may be due to sulfation reactions involved in blocking the action of DNA damaging agents, facilitating DNA repair, promoting cancer cell survival under therapeutic stress or reducing the bioavailability of DNA damaging agents. Our study demonstrates for the first time that PAPSS1 could be targeted to improve the activity of multiple anticancer agents used to treat NSCLC.
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Affiliation(s)
- Ada W Y Leung
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 2B5, Canada
| | - Wieslawa H Dragowska
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Daniel Ricaurte
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Brian Kwok
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Veena Mathew
- Terry Fox Laboratory, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Jeroen Roosendaal
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.,Department of Pharmaceutical Sciences, Utrecht University, Utrecht, TB, 3508, The Netherlands
| | - Amith Ahluwalia
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Corinna Warburton
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Janessa J Laskin
- Medical Oncology, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.,Department of Medicine, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Peter C Stirling
- Terry Fox Laboratory, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.,Department of Medical Genetics, University of British Columbia, Vancouver, BC, V6H 3N1, Canada
| | - Mohammed A Qadir
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada
| | - Marcel B Bally
- Experimental Therapeutics, BC Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 2B5, Canada.,Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.,Centre for Drug Research and Development, Vancouver, BC, V6T 1Z3, Canada
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