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Soni M, Saatci O, Gupta G, Patel Y, Keerthi Raja MR, Li J, Liu X, Xu P, Wang H, Fan D, Sahin O, Chen H. miR-489 Confines Uncontrolled Estrogen Signaling through a Negative Feedback Mechanism and Regulates Tamoxifen Resistance in Breast Cancer. Int J Mol Sci 2022; 23:ijms23158086. [PMID: 35897675 PMCID: PMC9331933 DOI: 10.3390/ijms23158086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 02/01/2023] Open
Abstract
Approximately 75% of diagnosed breast cancer tumors are estrogen-receptor-positive tumors and are associated with a better prognosis due to response to hormonal therapies. However, around 40% of patients relapse after hormonal therapies. Genomic analysis of gene expression profiles in primary breast cancers and tamoxifen-resistant cell lines suggested the potential role of miR-489 in the regulation of estrogen signaling and development of tamoxifen resistance. Our in vitro analysis showed that loss of miR-489 expression promoted tamoxifen resistance, while overexpression of miR-489 in tamoxifen-resistant cells restored tamoxifen sensitivity. Mechanistically, we found that miR-489 is an estrogen-regulated miRNA that negatively regulates estrogen receptor signaling by using at least the following two mechanisms: (i) modulation of the ER phosphorylation status by inhibiting MAPK and AKT kinase activities; (ii) regulation of nuclear-to-cytosol translocation of estrogen receptor α (ERα) by decreasing p38 expression and consequently ER phosphorylation. In addition, miR-489 can break the positive feed-forward loop between the estrogen-Erα axis and p38 MAPK in breast cancer cells, which is necessary for its function as a transcription factor. Overall, our study unveiled the underlying molecular mechanism by which miR-489 regulates an estrogen signaling pathway through a negative feedback loop and uncovered its role in both the development of and overcoming of tamoxifen resistance in breast cancers.
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Affiliation(s)
- Mithil Soni
- Department of Biological Science, University of South Carolina, Columbia, SC 29208, USA; (M.S.); (G.G.); (Y.P.); (M.R.K.R.)
| | - Ozge Saatci
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA; (O.S.); (P.X.); (O.S.)
| | - Gourab Gupta
- Department of Biological Science, University of South Carolina, Columbia, SC 29208, USA; (M.S.); (G.G.); (Y.P.); (M.R.K.R.)
| | - Yogin Patel
- Department of Biological Science, University of South Carolina, Columbia, SC 29208, USA; (M.S.); (G.G.); (Y.P.); (M.R.K.R.)
| | - Manikanda Raja Keerthi Raja
- Department of Biological Science, University of South Carolina, Columbia, SC 29208, USA; (M.S.); (G.G.); (Y.P.); (M.R.K.R.)
| | - Jie Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29201, USA;
| | - Xinfeng Liu
- Department of Mathematics, University of South Carolina, Columbia, SC 29201, USA;
| | - Peisheng Xu
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA; (O.S.); (P.X.); (O.S.)
| | - Hongjun Wang
- Department of Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA;
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC 29209, USA;
| | - Ozgur Sahin
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA; (O.S.); (P.X.); (O.S.)
| | - Hexin Chen
- Department of Biological Science, University of South Carolina, Columbia, SC 29208, USA; (M.S.); (G.G.); (Y.P.); (M.R.K.R.)
- Correspondence: ; Tel.: +1-803-777-2928; Fax: +1-803-777-4002
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Hou L, Tian HY, Wang L, Ferris ZE, Wang J, Cai M, Older EA, Raja MRK, Xue D, Sun W, Nagarkatti P, Nagarkatti M, Chen H, Fan D, Tang X, Li J. Identification and Biosynthesis of Pro-Inflammatory Sulfonolipids from an Opportunistic Pathogen Chryseobacterium gleum. ACS Chem Biol 2022; 17:1197-1206. [PMID: 35476918 DOI: 10.1021/acschembio.2c00141] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Sulfonolipids (SoLs) are a unique class of sphingolipids featuring a sulfonate group compared to other sphingolipids. However, the biological functions and biosynthesis of SoLs in human microbiota have been poorly understood. Here, we report the discovery and isolation of SoLs from a human opportunistic pathogen Chryseobacterium gleum DSM16776. We show for the first time the pro-inflammatory activity of SoLs with mice primary macrophages. Furthermore, we used both in vivo heterologous expression and in vitro biochemical reconstitution to characterize two enzymes, cysteate synthase and cysteate fatty acyltransferase, that are specifically involved in the biosynthesis of SoLs rather than other sphingolipids. Based on these two SoL-specific enzymes, our bioinformatics analysis showed a wider distribution of SoL biosynthetic genes in microbes that had not been reported as SoL producers. We selected four of these strains and verified their cysteate synthase and cysteate fatty acyltransferase activities in SoL biosynthesis. Considering this wider distribution of SoL-specific biosynthetic enzymes in the context of SoLs' activity in mediating inflammation, a common and fundamental biological process, it may suggest a more comprehensive function of SoLs at play.
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Affiliation(s)
- Lukuan Hou
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Hai-Yan Tian
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Li Wang
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Zachary E Ferris
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Junfeng Wang
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Mingwei Cai
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Ethan A. Older
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Manikanda Raja Keerthi Raja
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Dan Xue
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Wanyang Sun
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Hexin Chen
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Daping Fan
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Xiaoyu Tang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Jie Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Kefaloyianni E, Keerthi Raja MR, Schumacher J, Muthu ML, Krishnadoss V, Waikar SS, Herrlich A. Proximal Tubule-Derived Amphiregulin Amplifies and Integrates Profibrotic EGF Receptor Signals in Kidney Fibrosis. J Am Soc Nephrol 2019; 30:2370-2383. [PMID: 31676723 DOI: 10.1681/asn.2019030321] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 08/15/2019] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Sustained activation of EGF receptor (EGFR) in proximal tubule cells is a hallmark of progressive kidney fibrosis after AKI and in CKD. However, the molecular mechanisms and particular EGFR ligands involved are unknown. METHODS We studied EGFR activation in proximal tubule cells and primary tubular cells isolated from injured kidneys in vitro. To determine in vivo the role of amphiregulin, a low-affinity EGFR ligand that is highly upregulated with injury, we used ischemia-reperfusion injury or unilateral ureteral obstruction in mice with proximal tubule cell-specific knockout of amphiregulin. We also injected soluble amphiregulin into knockout mice with proximal tubule cell-specific deletion of amphiregulin's releasing enzyme, the transmembrane cell-surface metalloprotease, a disintegrin and metalloprotease-17 (ADAM17), and into ADAM17 hypomorphic mice. RESULTS Yes-associated protein 1 (YAP1)-dependent upregulation of amphiregulin transcript and protein amplifies amphiregulin signaling in a positive feedback loop. YAP1 also integrates signals of other moderately injury-upregulated, low-affinity EGFR ligands (epiregulin, epigen, TGFα), which also require soluble amphiregulin and YAP1 to induce sustained EGFR activation in proximal tubule cells in vitro. In vivo, soluble amphiregulin injection sufficed to reverse protection from fibrosis after ischemia-reperfusion injury in ADAM17 hypomorphic mice; injected soluble amphiregulin also reversed the corresponding protective proximal tubule cell phenotype in injured proximal tubule cell-specific ADAM17 knockout mice. Moreover, the finding that proximal tubule cell-specific amphiregulin knockout mice were protected from fibrosis after ischemia-reperfusion injury or unilateral ureteral obstruction demonstrates that amphiregulin was necessary for the development of fibrosis. CONCLUSIONS Our results identify amphiregulin as a key player in injury-induced kidney fibrosis and suggest therapeutic or diagnostic applications of soluble amphiregulin in kidney disease.
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Affiliation(s)
- Eirini Kefaloyianni
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
| | - Manikanda Raja Keerthi Raja
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
| | - Julian Schumacher
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
| | - Muthu Lakshmi Muthu
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
| | - Vaishali Krishnadoss
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
| | - Sushrut S Waikar
- Renal Division, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts
| | - Andreas Herrlich
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; and
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