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Yu L, Ji Kim H, Kim B, Jung Byun H, Minh Nguyen T, Ji Kim E, Huy Phùng H, Hyeon Kim Y, Rahman M, Yun Jang J, Bae Rho S, Jin Kang G, Lee H, Lee K, Kyung Han H, Kyung Park M, Hoon Lee C. Ethacrynic acid suppresses B7-H4 expression involved in epithelial-mesenchymal transition of lung adenocarcinoma cells via inhibiting STAT3 pathway. Biochem Pharmacol 2023; 212:115537. [PMID: 37019184 DOI: 10.1016/j.bcp.2023.115537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/26/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023]
Abstract
Lung cancer is characterized by high incidence and mortality. 90% of cancer deaths are caused by metastases. The epithelial-mesenchymal transition (EMT) process in cancer cells is a prerequisite for the metastatic process. Ethacrynic acid (ECA) is a loop diuretic that inhibits the EMT process in lung cancer cells. EMT has been related to the tumour immunemicroenvironment. However, the effect of ECA on immune checkpoint molecules in the context of cancer has not been fully identified. In the present study, we found that sphingosylphosphorylcholine (SPC) and TGF-β1, awell-known EMT inducer, induced the expression of B7-H4 in lung cancer cells. We also investigated the involvement of B7-H4 in the SPC-induced EMT process. Knockdown of B7-H4 suppressed SPC-induced EMT, while B7-H4 overexpression enhanced EMT of lung cancer cells. ECA inhibited SPC/TGF-β1-induced B7-H4 expression via suppression of STAT3 activation. Moreover, ECA inhibits the colonization of mice lung by tail vein-injected LLC1 cells. ECA-treated mice increased the CD4-positive T cells in lung tumour tissues. In summary, these results suggested that ECA inhibits B7-H4 expression via STAT3 inhibition, leading to SPC/TGF-β1-induced EMT. Therefore, ECA might be an immune oncological drug for B7-H4-positive cancer, especially lung cancer.
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Jeong BY, Cho KH, Jeong KJ, Cho SJ, Won M, Kim SH, Cho NH, Hur GM, Yoon SH, Park HW, Mills GB, Lee HY. Lysophosphatidic acid-induced amphiregulin secretion by cancer-associated fibroblasts augments cancer cell invasion. Cancer Lett 2022; 551:215946. [PMID: 36209972 DOI: 10.1016/j.canlet.2022.215946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 09/29/2022] [Accepted: 10/03/2022] [Indexed: 11/02/2022]
Abstract
Cancer-associated fibroblasts (CAFs) are key structural components of the tumor microenvironment and are closely associated with tumor invasion and metastasis. Lysophosphatidic acid (LPA) is a biolipid produced extracellularly and involved in tumorigenesis and metastasis. LPA has recently been implicated in the education and transdifferentiation of normal fibroblasts (NFs) into CAFs. However, little is known about the effects of LPA on CAFs and their participation in cancer cell invasion. In the present study, we identified a critical role of LPA-induced amphiregulin (AREG) secreted from CAFs in cancer invasiveness. CAFs secrete higher amounts of AREG than NFs, and LPA induces AREG expression in CAFs to augment their invasiveness. Strikingly, knocking out the AREG gene in CAFs attenuates cancer invasiveness and metastasis. Mechanistically, LPA induces Yes-associated protein (YAP) activation and Zinc finger E-box binding homeobox 1 (Zeb1) expression through the LPAR1 and LPAR3/Gi/Rho signaling axes, leading to AREG expression. Furthermore, we provide evidence that metformin, a biguanide derivative, significantly inhibits LPA-induced AREG expression in CAFs to attenuate cancer cell invasiveness. Collectively, the present data show that LPA induces AREG expression through YAP and Zeb1 in CAFs to promote cancer cell invasiveness, with the process being inhibited by metformin, providing potential biomarkers and therapeutic avenues to interdict cancer cell invasion.
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Affiliation(s)
- Bo Young Jeong
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea; Division of Oncological Sciences Knight Cancer Institute, Oregon Health and Science University, Portland, OR, 97201, USA
| | - Kyung Hwa Cho
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea
| | - Kang Jin Jeong
- Division of Oncological Sciences Knight Cancer Institute, Oregon Health and Science University, Portland, OR, 97201, USA
| | - Su Jin Cho
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea
| | - Minho Won
- Biotechnology Process Engineering Center, Korea Research Institute of Bioscience & Biotechnology, Cheongju, 28116, Republic of Korea; Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea
| | - Seung Hwa Kim
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea
| | - Nam Hoon Cho
- Department of Pathology, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea
| | - Gang Min Hur
- Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon, 35015, Republic of Korea
| | - Se-Hee Yoon
- Division of Nephrology and Department of Internal Medicine, College of Medicine, Konyang University, Daejeon, 35364, Republic of Korea
| | - Hwan-Woo Park
- Department of Cell Biology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea
| | - Gordon B Mills
- Division of Oncological Sciences Knight Cancer Institute, Oregon Health and Science University, Portland, OR, 97201, USA
| | - Hoi Young Lee
- Department of Pharmacology, College of Medicine, Konyang University, Daejeon, 35365, Republic of Korea.
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