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Liang S, Yadav M, Vogel KS, Habib SL. A novel role of snail in regulating tuberin/AMPK pathways to promote renal fibrosis in the new mouse model of type II diabetes. FASEB Bioadv 2021; 3:730-743. [PMID: 34485841 PMCID: PMC8409551 DOI: 10.1096/fba.2020-00134] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/25/2021] [Accepted: 04/14/2021] [Indexed: 01/01/2023] Open
Abstract
Epithelial-mesenchymal transition (EMT) plays an important role in tissue fibrosis following chronic exposure to hyperglycemia. This study investigates the role of chronic diabetes in regulating tuberin/snail/AMPK to enhance EMT and increase renal fibrosis. A new mouse model of db/db/TSC2 +/- was generated by backcrossing db/db mice and TSC2 +/- mice. Wild type (WT), db/db, TSC2 +/- and dbdb/TSC2 +/- mice were sacrificed at ages 6 and 8 months old. Tuberin protein level was significantly decreased in kidneys from diabetic compared to WT mice at both ages. In addition, tuberin and E-cadherin protein levels were significantly decreased in dbdb/TSC2 +/- compared to TSC2 +/- and db/db mice. In contrast, p-PS6K, NFkB, snail, vimentin, fibronectin, and α-SMA protein levels were significantly increased in dbdb/TSC2 +/- compared to db/db and TSC2 +/- mice at ages 6 and 8 months. Both downregulation of AMPK by DN-AMPK and downregulation of tuberin by siRNA resulted in increased NFkB, snail, and fibronectin protein expression and decreased E-cadherin protein expression in mouse primary renal proximal tubular cells. Interestingly, downregulation of snail by siRNA increased tuberin expression via feedback through activation of AMPK and reversed the expression of epithelial proteins such as E-cadherin as well as mesenchymal proteins such as fibronectin, NF-KB, vimentin, and α-SMA in mouse primary renal proximal tubular cells isolated from kidneys of four mice genotypes. The data show that chronic diabetes significantly decreases tuberin expression and that provides strong evidence that tuberin is a major key protein involved in regulating EMT. These data also demonstrated a novel role for snail in regulating of AMPK/tuberin to enhance EMT and renal cell fibrosis in diabetes.
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Affiliation(s)
- Sitai Liang
- Department of Cell Systems and Anatomy The University of Texas Health Science Center San Antonio Texas USA
| | - Mukesh Yadav
- Department of Cell Systems and Anatomy The University of Texas Health Science Center San Antonio Texas USA
| | - Kristine S Vogel
- Department of Cell Systems and Anatomy The University of Texas Health Science Center San Antonio Texas USA
| | - Samy L Habib
- Department of Cell Systems and Anatomy The University of Texas Health Science Center San Antonio Texas USA.,South Texas, Veterans Healthcare System San Antonio Texas USA
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Bonucci M, Kuperwasser N, Barbe S, Koka V, de Villeneuve D, Zhang C, Srivastava N, Jia X, Stokes MP, Bienaimé F, Verkarre V, Lopez JB, Jaulin F, Pontoglio M, Terzi F, Delaval B, Piel M, Pende M. mTOR and S6K1 drive polycystic kidney by the control of Afadin-dependent oriented cell division. Nat Commun 2020; 11:3200. [PMID: 32581239 PMCID: PMC7314806 DOI: 10.1038/s41467-020-16978-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 06/01/2020] [Indexed: 02/08/2023] Open
Abstract
mTOR activation is essential and sufficient to cause polycystic kidneys in Tuberous Sclerosis Complex (TSC) and other genetic disorders. In disease models, a sharp increase of proliferation and cyst formation correlates with a dramatic loss of oriented cell division (OCD). We find that OCD distortion is intrinsically due to S6 kinase 1 (S6K1) activation. The concomitant loss of S6K1 in Tsc1-mutant mice restores OCD but does not decrease hyperproliferation, leading to non-cystic harmonious hyper growth of kidneys. Mass spectrometry-based phosphoproteomics for S6K1 substrates revealed Afadin, a known component of cell-cell junctions required to couple intercellular adhesions and cortical cues to spindle orientation. Afadin is directly phosphorylated by S6K1 and abnormally decorates the apical surface of Tsc1-mutant cells with E-cadherin and α-catenin. Our data reveal that S6K1 hyperactivity alters centrosome positioning in mitotic cells, affecting oriented cell division and promoting kidney cysts in conditions of mTOR hyperactivity.
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Affiliation(s)
- Martina Bonucci
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Nicolas Kuperwasser
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Serena Barbe
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Vonda Koka
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Delphine de Villeneuve
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Chi Zhang
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Nishit Srivastava
- Institut Curie, PSL Research University, CNRS, UMR 144, F-75005, Paris, France
| | - Xiaoying Jia
- Cell Signaling Technology INC, 3 Trask Lane, Danvers, MA, 01923, USA
| | - Matthew P Stokes
- Cell Signaling Technology INC, 3 Trask Lane, Danvers, MA, 01923, USA
| | - Frank Bienaimé
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Virginie Verkarre
- Université de Paris, PARCC, INSERM, Equipe Labellisée par la Ligue contre le Cancer, F-75015, Paris, France.,Assistance Publique-Hôpitaux de Paris (AP-HP centre), Hôpital Européen Georges Pompidou, Département d'anatomo-pathologie, F-75015, Paris, France
| | | | | | - Marco Pontoglio
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Fabiola Terzi
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France.,Inserm, U1151, Paris, F-75014, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Benedicte Delaval
- CRBM, CNRS, Univ. Montpellier, Centrosome, cilia and pathologies Lab, 1919 Route de Mende, 34293, Montpellier, France
| | - Matthieu Piel
- Institut Curie, PSL Research University, CNRS, UMR 144, F-75005, Paris, France
| | - Mario Pende
- Institut Necker-Enfants Malades, 14 rue Maria Helena Vieira Da Silva, CS, 61431, Paris, France. .,Inserm, U1151, Paris, F-75014, France. .,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
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Jiang WG, Sampson J, Martin TA, Lee-Jones L, Watkins G, Douglas-Jones A, Mokbel K, Mansel RE. Tuberin and hamartin are aberrantly expressed and linked to clinical outcome in human breast cancer: the role of promoter methylation of TSC genes. Eur J Cancer 2005; 41:1628-36. [PMID: 15951164 DOI: 10.1016/j.ejca.2005.03.023] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2005] [Revised: 03/23/2005] [Accepted: 03/29/2005] [Indexed: 11/17/2022]
Abstract
PURPOSE The tuberous sclerosis (TSC) genes TSC1 and TSC2 encode the protein products hamartin and tuberin, respectively, and are putative tumour suppressor genes. Germ-line mutation of either TSC gene leads to the development of the heritable disorder TSC. This disorder is characterized by the development of hamartomas in many organs and is associated with the proliferative lung disease, lymphangioleiomyomatosis, the brain tumour giant cell astrocytoma and occasionally with renal cell carcinoma. However, the TSC genes have not been studied in breast cancer. The current study investigated the expression of the TSC gene products and the potential mechanisms of their aberrancy in human breast cancer cells and tissues. EXPERIMENTAL DESIGN AND RESULTS Using immunohistochemical analysis, both hamartin and tuberin were found to be strongly stained in normal mammary epithelial cells and weakly in stromal cells. In invasive tumour tissues, however, the staining of both proteins were to be markedly reduced (P < 0.01). At message level, although normal and tumour tissues expressed both TSC products, the transcript levels of tuberin was significantly lower in tumour tissues compared with normal tissues (P < 0.05). There was no statistical difference between node negative and node positive tumours with both hamartin and tuberin. Tumours from patients who developed recurrence and died from breast cancer had significantly low levels of tuberin compared with those who remained disease free (P = 0.03 and 0.05, respectively). Likewise, hamartin levels were significantly lower in patients with metastasis, recurrence and mortality, when compared with those remained disease free (P = 0.001, 0.041 and 0.003, respectively). Using methylation specific PCR, the TSC1 promoter was found to be heavily methylated in ZR751, MDA MB 435, and BT549, but not in MCF-7 which expressed highly level of hamartin. TSC1 promoter methylation was also seen in most breast tumours, but only in a limited number of normal tissues. The methylation of TSC2 promoter appears to be less frequent. MDA MB 468, MDA MB 483, MDA MB 435S and weakly MDA MB 435 were found to have methylated TSC2 promoter. In breast tissues, however, a very small number of samples were found to have methylation of the TSC2 promoter. CONCLUSION TSC1 genes are aberrantly expressed in human breast cancer cell lines and breast tumour tissues and their promoters are seen to be methylated in breast tumour tissues. The expression of TSC1 is associated with an unfavourable clinical outcome in patients with breast cancer.
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Affiliation(s)
- Wen G Jiang
- Metastasis and Angiogenesis Research Group, University Department of Surgery, Wales College of Medicine, Cardiff University, UK.
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