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McNamara JT, Huntington KE, Borys S, Jayasuriya CT, Brossay L. SHP-2 deletion in CD4Cre expressing chondrocyte precursors leads to tumor development with wrist tropism. Sci Rep 2021; 11:20006. [PMID: 34625577 PMCID: PMC8501018 DOI: 10.1038/s41598-021-99339-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 09/20/2021] [Indexed: 11/16/2022] Open
Abstract
Due to redundancy with other tyrosine phosphatases, the ubiquitously expressed tyrosine phosphatase SHP-2 (encoded by Ptpn11) is not required for T cell development. However, Ptpn11 gene deletion driven by CD4 Cre recombinase leads to cartilage tumors in the wrist. Using a fate mapping system, we demonstrate that wrist tumor development correlates with increased frequency and numbers of non-hematopoietic lineage negative CD45 negative cells with a bone chondrocyte stromal cell precursor cell (BCSP) phenotype. Importantly, the BCSP subset has a history of CD4 expression and a marked wrist location tropism, explaining why the wrist is the main site of tumor development. Mechanistically, we found that in SHP-2 absence, SOX-9 is no longer regulated, leading to an uncontrolled proliferation of the BCSP subset. Altogether, these results identify a unique subset of chondrocyte precursors tightly regulated by SHP-2. These findings underscore the need for the development of methods to therapeutically target this subset of cells, which could potentially have an impact on treatment of SHP-2 dysfunction linked debilitating diseases.
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Affiliation(s)
- Jeffrey T McNamara
- Division of Biology and Medicine, Department of Molecular Microbiology and Immunology, Brown University Alpert Medical School, Providence, RI, 02912, USA
| | - Kelsey E Huntington
- Division of Biology and Medicine, Department of Molecular Microbiology and Immunology, Brown University Alpert Medical School, Providence, RI, 02912, USA
| | - Samantha Borys
- Division of Biology and Medicine, Department of Molecular Microbiology and Immunology, Brown University Alpert Medical School, Providence, RI, 02912, USA
| | - Chathuraka T Jayasuriya
- Department of Orthopaedics, Rhode Island Hospital and Brown University Alpert Medical School, Providence, RI, USA
| | - Laurent Brossay
- Division of Biology and Medicine, Department of Molecular Microbiology and Immunology, Brown University Alpert Medical School, Providence, RI, 02912, USA.
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Liu JJ, Li Y, Chen WS, Liang Y, Wang G, Zong M, Kaneko K, Xu R, Karin M, Feng GS. Shp2 deletion in hepatocytes suppresses hepatocarcinogenesis driven by oncogenic β-Catenin, PIK3CA and MET. J Hepatol 2018; 69:79-88. [PMID: 29505847 PMCID: PMC6008184 DOI: 10.1016/j.jhep.2018.02.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 01/22/2018] [Accepted: 02/12/2018] [Indexed: 01/16/2023]
Abstract
BACKGROUND & AIMS Shp2 is an SH2-tyrosine phosphatase acting downstream of receptor tyrosine kinases (RTKs). Most recent data demonstrated a liver tumor-suppressing role for Shp2, as ablating Shp2 in hepatocytes aggravated hepatocellular carcinoma (HCC) induced by chemical carcinogens or Pten loss. We further investigated the effect of Shp2 deficiency on liver tumorigenesis driven by classical oncoproteins c-Met (receptor for HGF), β-catenin and PIK3CA. METHODS We performed hydrodynamic tail vein injection of two pairs of plasmids expressing c-Met and ΔN90-β-catenin (MET/CAT), or c-Met and PIK3CAH1047R (MET/PIK), into WT and Shp2hep-/- mice. We compared liver tumor loads and investigated the pathogenesis and molecular mechanisms involved using multidisciplinary approaches. RESULTS Despite the induction of oxidative and metabolic stresses, Shp2 deletion in hepatocytes suppressed hepatocarcinogenesis driven by overexpression of oncoproteins MET/CAT or MET/PIK. Shp2 loss inhibited proliferative signaling from c-Met, Wnt/β-catenin, Ras/Erk and PI3K/Akt pathways, but triggered cell senescence following exogenous expression of the oncogenes. CONCLUSIONS Shp2, acting downstream of RTKs, is positively required for hepatocyte-intrinsic tumorigenic signaling from these oncoproteins, even if Shp2 deficiency induces a tumor-promoting hepatic microenvironment. These data suggest a new and more effective therapeutic strategy for HCCs driven by oncogenic RTKs and other upstream molecules, by inhibiting Shp2 and also suppressing any tumor-enhancing stromal factors produced because of Shp2 inhibition. LAY SUMMARY Primary liver cancer is a malignant disease with poor prognosis, largely because there are limited systemic therapies available. We show here that a cytoplasmic tyrosine phosphatase Shp2 is required for liver tumorigenesis. This tumorigenesis is driven by two oncoproteins that are implicated in human liver cancer. This, together with our previous studies, uncovers the complexity of liver tumorigenesis, by elucidating the pro- and anti-tumor effects of Shp2 in mouse models. This data can be used to guide new therapies.
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Affiliation(s)
- Jacey J. Liu
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Yanjie Li
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA,Department of Hepatobiliary Surgery, 3rd affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wendy S. Chen
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Yan Liang
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Gaowei Wang
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Min Zong
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Kota Kaneko
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Ruiyun Xu
- Department of Hepatobiliary Surgery, 3rd affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Michael Karin
- Departments of Pharmacology and Pathology, University of California San Diego, La Jolla, CA, USA
| | - Gen-Sheng Feng
- Department of Pathology, and Division of Biological Sciences, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA, USA.
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Miah SMS, Jayasuriya CT, Salter AI, Reilly EC, Fugere C, Yang W, Chen Q, Brossay L. Ptpn11 Deletion in CD4 + Cells Does Not Affect T Cell Development and Functions but Causes Cartilage Tumors in a T Cell-Independent Manner. Front Immunol 2017; 8:1326. [PMID: 29085371 PMCID: PMC5650614 DOI: 10.3389/fimmu.2017.01326] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 09/29/2017] [Indexed: 12/01/2022] Open
Abstract
The ubiquitously expressed tyrosine phosphatase Src homology region 2 domain-containing phosphatase-2 (SHP-2, encoded by Ptpn11) is required for constitutive cellular processes including proliferation, differentiation, and the regulation of immune responses. During development and maturation, subsets of T cells express a variety of inhibitory receptors known to associate with phosphatases, which in turn, dephosphorylate key players of activating receptor signaling pathways. We hypothesized that SHP-2 deletion would have major effects on T cell development by altering the thresholds for activation, as well as positive and negative selection. Surprisingly, using mice conditionally deficient for SHP-2 in the T cell lineage, we show that the development of these lymphocytes is globally intact. In addition, our data demonstrate that SHP-2 absence does not compromise T cell effector functions, suggesting that SHP-2 is dispensable in these cells. Unexpectedly, in aging mice, Ptpn11 gene deletion driven by CD4 Cre recombinase leads to cartilage tumors in wrist bones in a T cell-independent manner. These tumors resemble miniature cartilaginous growth plates and contain CD4-lineage positive chondrocyte-like cells. Altogether these results indicate that SHP-2 is a cartilage tumor suppressor during aging.
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Affiliation(s)
- S M Shahjahan Miah
- Department of Molecular Microbiology and Immunology, Graduate Program in Pathobiology, Division of Biology and Medicine, Brown University Alpert Medical School, Providence, RI, United States
| | - Chathuraka T Jayasuriya
- Department of Orthopaedics, Rhode Island Hospital and Brown University Alpert Medical School, Providence, RI, United States
| | - Alexander I Salter
- Department of Molecular Microbiology and Immunology, Graduate Program in Pathobiology, Division of Biology and Medicine, Brown University Alpert Medical School, Providence, RI, United States
| | - Emma C Reilly
- Department of Molecular Microbiology and Immunology, Graduate Program in Pathobiology, Division of Biology and Medicine, Brown University Alpert Medical School, Providence, RI, United States
| | - Céline Fugere
- Department of Molecular Microbiology and Immunology, Graduate Program in Pathobiology, Division of Biology and Medicine, Brown University Alpert Medical School, Providence, RI, United States
| | - Wentian Yang
- Department of Orthopaedics, Rhode Island Hospital and Brown University Alpert Medical School, Providence, RI, United States
| | - Qian Chen
- Department of Orthopaedics, Rhode Island Hospital and Brown University Alpert Medical School, Providence, RI, United States
| | - Laurent Brossay
- Department of Molecular Microbiology and Immunology, Graduate Program in Pathobiology, Division of Biology and Medicine, Brown University Alpert Medical School, Providence, RI, United States
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Shp2 Inhibits Proliferation of Esophageal Squamous Cell Cancer via Dephosphorylation of Stat3. Int J Mol Sci 2017; 18:ijms18010134. [PMID: 28085101 PMCID: PMC5297767 DOI: 10.3390/ijms18010134] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 12/21/2016] [Accepted: 01/04/2017] [Indexed: 12/31/2022] Open
Abstract
Shp2 (Src-homology 2 domain-containing phosphatase 2) was originally reported as an oncogene in kinds of solid tumors and hematologic malignancies. However, recent studies indicated that Shp2 may act as tumor suppressors in several tumor types. We investigated the function of Shp2 in esophageal squamous cell cancer (ESCC). The expression level of Shp2 was analyzed in tumor tissues in comparison with adjacent normal tissues of ESCC patients by immunohistochemistry and Western blot. Shp2 was knocked down by Short hairpin RNA to evaluate its function in ESCC cell lines. The relationship between Shp2 and p-Stat3 (signal transducer and activator of transcription 3) in human ESCC tissues was statistically examined. A significant low expression of Shp2 was found in ESCC tissues. Low expression of Shp2 was related to poorer overall survival in patients from The Cancer Genome Atlas (TCGA) dataset. Knockdown of Shp2 increased the growth of ESCC cell lines both in vivo and vitro. Activation of Stat3 (p-Stat3) was induced by Shp2 depletion. Expression of p-Stat3 was negatively correlated with Shp2 expression in ESCC tissues. Furthermore, knockdown of Shp2 attenuated cisplatin-sensitivity of ESCC cells. Shp2 might suppress the proliferation of ESCC by dephosphorylation of p-Stat3 and represents a novel research field for targeted therapy.
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Han T, Xiang DM, Sun W, Liu N, Sun HL, Wen W, Shen WF, Wang RY, Chen C, Wang X, Cheng Z, Li HY, Wu MC, Cong WM, Feng GS, Ding J, Wang HY. PTPN11/Shp2 overexpression enhances liver cancer progression and predicts poor prognosis of patients. J Hepatol 2015; 63:651-60. [PMID: 25865556 DOI: 10.1016/j.jhep.2015.03.036] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 03/04/2015] [Accepted: 03/31/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS We have previously reported that Shp2, a tyrosine phosphatase previously known as a pro-leukemogenic molecule, suppresses the initiation of hepatocellular carcinoma (HCC). However, the role of Shp2 in HCC progression remains obscure. METHODS Shp2 expression was determined in human HCC using real-time PCR, immunoblotting and immunohistochemistry. Clinical significance of Shp2 expression was analyzed in 301 HCC tissues with clinico-pathological characteristics and follow-up information. Short hairpin RNA was utilized to investigate the function of Shp2 in hepatoma cell behavior. Role of Shp2 in HCC progression was monitored through nude mice xenograft assay. Kinase activity assay and co-immunoprecipitation were used for mechanism analysis. RESULTS Elevated expression of Shp2 was detected in 65.9% (394/598) of human HCCs, and its levels were even higher in metastasized foci. Overexpression of Shp2 correlated well with the malignant clinico-pathological characteristics of HCC and predicted the poor prognosis of patients. Interference of Shp2 expression suppressed the proliferation of hepatoma cells in vitro and inhibited the growth of HCC xenografts in vivo. Down-regulation of Shp2 attenuated the adhesion and migration of hepatoma cells and diminished metastasized HCC formation in mice. Our data demonstrated that Shp2 promotes HCC growth and metastasis by coordinately activating Ras/Raf/Erk pathway and PI3-K/Akt/mTOR cascade. Moreover, down-regulation of Shp2 enhanced the sensitivity of hepatoma cells upon sorafenib treatment, and patients with low Shp2 expression exhibited superior prognosis to sorafenib. CONCLUSIONS Shp2 promotes the progression of HCC and may serve as a prognostic biomarker for patients.
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Affiliation(s)
- Tao Han
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Dai-Min Xiang
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Wen Sun
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Na Liu
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Huan-Lin Sun
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Wen Wen
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Wei-Feng Shen
- The Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200438, China
| | - Ruo-Yu Wang
- The Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200438, China
| | - Cheng Chen
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Xue Wang
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Zhuo Cheng
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Heng-Yu Li
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China
| | - Meng-Chao Wu
- The Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Shanghai 200438, China
| | - Wen-Ming Cong
- The Department of Pathology, Eastern Hepatobiliary Surgery Hospital, Shanghai 200438, China
| | - Gen-Sheng Feng
- Department of Pathology, and Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Jin Ding
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China; National Center for Liver Cancer, Shanghai 200433, China.
| | - Hong-Yang Wang
- The International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China; National Center for Liver Cancer, Shanghai 200433, China.
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Gu J, Han T, Ma RH, Zhu YL, Jia YN, Du JJ, Chen Y, Jiang XJ, Xie XD, Guo X. SHP2 promotes laryngeal cancer growth through the Ras/Raf/Mek/Erk pathway and serves as a prognostic indicator for laryngeal cancer. Int J Oncol 2013; 44:481-90. [PMID: 24297342 DOI: 10.3892/ijo.2013.2191] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 11/05/2013] [Indexed: 11/06/2022] Open
Abstract
The overall survival rate and prognosis of patients with laryngeal cancer are not optimistic despite advances in therapeutic techniques. Gene expression prognostic models enable the development of more appropriate treatment strategies. The human gene PTPN11 encoding a non-receptor protein tyrosine phosphatase, Src homology phosphotyrosine phosphatase 2 (SHP2), is a well-documented proto-oncogene in various malignancies. This study investigated the role of SHP2 expression and associated clinical manifestations in laryngeal cancer using a tissue microarray of 112 pairs of laryngeal cancer samples and corresponding adjacent normal mucosae. SHP2 expression increased in laryngeal cancer, and this result was associated with the poor survival rate of laryngeal cancer patients. Moreover, increased SHP2 expression remarkably promoted the growth of laryngeal cancer cells in vitro and tumorigenicity of laryngeal cancer cells in vivo. The Ras/Raf/Mek/Erk pathway was also found to be involved in the SHP2-induced growth of laryngeal cancer cells. Overall, our findings indicated that SHP2 plays an important role in laryngeal cancer tumorigenesis and that its expression is negatively correlated with the prognosis of patients. Thus, SHP2 may be a promising combinational therapeutic target for treatment of laryngeal cancer. The interference of SHP2 expression can serve as a novel strategy for laryngeal cancer treatment.
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Affiliation(s)
- Jia Gu
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Tao Han
- Department of Oncology, General Hospital of Shenyang Military Region, Shenyang 110016, P.R. China
| | - Rui-Hang Ma
- Department of Operation Room, General Hospital of Shenyang Military Region, Shenyang 110016, P.R. China
| | - Yu-Lin Zhu
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Yi-Na Jia
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Jing-Jing Du
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Yu Chen
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Xue-Jun Jiang
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
| | - Xiao-Dong Xie
- Department of Oncology, General Hospital of Shenyang Military Region, Shenyang 110016, P.R. China
| | - Xing Guo
- Department of Otolaryngology, The First Affiliated Hospital of China Medical University, Shenyang 110001, P.R. China
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He Z, Zhu HH, Bauler TJ, Wang J, Ciaraldi T, Alderson N, Li S, Raquil MA, Ji K, Wang S, Shao J, Henry RR, King PD, Feng GS. Nonreceptor tyrosine phosphatase Shp2 promotes adipogenesis through inhibition of p38 MAP kinase. Proc Natl Acad Sci U S A 2013; 110:E79-88. [PMID: 23236157 PMCID: PMC3538237 DOI: 10.1073/pnas.1213000110] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The molecular mechanism underlying adipogenesis and the physiological functions of adipose tissue are not fully understood. We describe here a unique mouse model of severe lipodystrophy. Ablation of Ptpn11/Shp2 in adipocytes, mediated by aP2-Cre, led to premature death, lack of white fat, low blood pressure, compensatory erythrocytosis, and hepatic steatosis in Shp2(fat-/-) mice. Fat transplantation partially rescued the lifespan and blood pressure in Shp2(fat-/-) mice, and administration of leptin also restored partially the blood pressure of mutant animals with endogenous leptin deficiency. Consistently, homozygous deletion of Shp2 inhibited adipocyte differentiation from embryonic stem (ES) cells. Biochemical analyses suggest a Shp2-TAO2-p38-p300-PPARγ pathway in adipogenesis, in which Shp2 suppresses p38 activation, leading to stabilization of p300 and enhanced PPARγ expression. Inhibition of p38 restored adipocyte differentiation from Shp2(-/-) ES cells, and p38 signaling is also suppressed in obese patients and obese animals. These results illustrate an essential role of adipose tissue in mammalian survival and physiology and also suggest a common signaling mechanism involved in adipogenesis and obesity development.
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Affiliation(s)
- Zhao He
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Helen H. Zhu
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Timothy J. Bauler
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109-5620; and
| | - Jing Wang
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Theodore Ciaraldi
- Veteran’s Administration San Diego Healthcare System and Department of Medicine, and
| | - Nazilla Alderson
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Shuangwei Li
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Marie-Astrid Raquil
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Kaihong Ji
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Shufen Wang
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
| | - Jianhua Shao
- Department of Pediatrics, University of California at San Diego, La Jolla,CA 92093
| | - Robert R. Henry
- Veteran’s Administration San Diego Healthcare System and Department of Medicine, and
| | - Philip D. King
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109-5620; and
| | - Gen-Sheng Feng
- Department of Pathology and Division of Biological Sciences, University of California at San Diego, La Jolla, CA 92093-0864
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The protein tyrosine phosphatase, Shp2, positively contributes to FLT3-ITD-induced hematopoietic progenitor hyperproliferation and malignant disease in vivo. Leukemia 2012; 27:398-408. [PMID: 23103841 PMCID: PMC3916934 DOI: 10.1038/leu.2012.308] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Internal tandem duplications (ITDs) in the fms-like tyrosine kinase receptor (FLT3-ITDs) confer a poor prognosis in acute myeloid leukemia (AML). We hypothesized that increased recruitment of the protein tyrosine phosphatase, Shp2, to FLT3-ITDs contributes to FLT3 ligand (FL)-independent hyperproliferation and STAT5 activation. Co-immunoprecipitation demonstrated constitutive association of Shp2 with the FLT3-ITD, N51-FLT3, as well as with STAT5. Knockdown of Shp2 in Baf3/N51-FLT3 cells significantly reduced proliferation while having little effect on WT-FLT3-expressing cells. Consistently, mutation of N51-FLT3 tyrosine 599 to phenylalanine or genetic disruption of Shp2 in N51-FLT3-expressing bone marrow low-density mononuclear cells reduced proliferation and STAT5 activation. In transplants, genetic disruption of Shp2 in vivo yielded increased latency to and reduced severity of FLT3-ITD-induced malignancy. Mechanistically, Shp2 co-localizes with nuclear phospho-STAT5, is present at functional interferon-γ activation sites (GAS) within the BCL2L1 promoter, and positively activates the human BCL2L1 promoter, suggesting that Shp2 works with STAT5 to promote pro-leukemogenic gene expression. Further, using a small molecule Shp2 inhibitor, the proliferation of N51-FLT3-expressing bone marrow progenitors and primary AML samples was reduced in a dose-dependent manner. These findings demonstrate that Shp2 positively contributes to FLT3-ITD-induced leukemia and suggest that Shp2 inhibition may provide a novel therapeutic approach to AML.
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Zhu HH, Feng GS. The dynamic interplay between a PTK (Kit) and a PTP (Shp2) in hematopoietic stem and progenitor cells. Cell Cycle 2011; 10:2241-2. [PMID: 21701261 DOI: 10.4161/cc.10.14.15861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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10
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Kit-Shp2-Kit signaling acts to maintain a functional hematopoietic stem and progenitor cell pool. Blood 2011; 117:5350-61. [PMID: 21450902 DOI: 10.1182/blood-2011-01-333476] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The stem cell factor (SCF)/Kit system has served as a classic model in deciphering molecular signaling events in the hematopoietic compartment, and Kit expression is a most critical marker for hematopoietic stem cells (HSCs) and progenitors. However, it remains to be elucidated how Kit expression is regulated in HSCs. Herein we report that a cytoplasmic tyrosine phosphatase Shp2, acting downstream of Kit and other RTKs, promotes Kit gene expression, constituting a Kit-Shp2-Kit signaling axis. Inducible ablation of PTPN11/Shp2 resulted in severe cytopenia in BM, spleen, and peripheral blood in mice. Shp2 removal suppressed the functional pool of HSCs/progenitors, and Shp2-deficient HSCs failed to reconstitute lethally irradiated recipients because of defects in homing, self-renewal, and survival. We show that Shp2 regulates coordinately multiple signals involving up-regulation of Kit expression via Gata2. Therefore, this study reveals a critical role of Shp2 in maintenance of a functional HSC/progenitor pool in adult mammals, at least in part through a kinase-phosphatase-kinase cascade.
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Coordinated regulation by Shp2 tyrosine phosphatase of signaling events controlling insulin biosynthesis in pancreatic beta-cells. Proc Natl Acad Sci U S A 2009; 106:7531-6. [PMID: 19380737 DOI: 10.1073/pnas.0811715106] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Intracellular signaling by which pancreatic beta-cells synthesize and secrete insulin in control of glucose homeostasis is not fully understood. Here we show that Shp2, a cytoplasmic tyrosine phosphatase possessing 2 SH2 domains, coordinates signaling events required for insulin biosynthesis in beta-cells. Mice with conditional ablation of the Shp2/Ptpn11 gene in the pancreas exhibited defective glucose-stimulated insulin secretion and impaired glucose tolerance. Consistently, siRNA-mediated Shp2-knockdown in rat insulinoma INS-1 832/13 cells resulted in decreased insulin production and secretion despite an increase in cellular ATP. Shp2 modulates the strength of signals flowing through Akt/FoxO1 and Erk pathways, culminating in control of Pdx1 expression and activity on Ins1 and Ins2 promoters, and forced Pdx1 expression rescued insulin production in Shp2-knockdown beta-cells. Therefore, Shp2 acts as a signal coordinator in beta-cells, orchestrating multiple pathways controlling insulin biosynthesis to maintain glucose homeostasis.
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Deletion of Shp2 tyrosine phosphatase in muscle leads to dilated cardiomyopathy, insulin resistance, and premature death. Mol Cell Biol 2008; 29:378-88. [PMID: 19001090 DOI: 10.1128/mcb.01661-08] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The intracellular signaling mechanisms underlying the pathogenesis of cardiac diseases are not fully understood. We report here that selective deletion of Shp2, an SH2-containing cytoplasmic tyrosine phosphatase, in striated muscle results in severe dilated cardiomyopathy in mice, leading to heart failure and premature mortality. Development of cardiomyopathy in this mouse model is coupled with insulin resistance, glucose intolerance, and impaired glucose uptake in striated muscle cells. Shp2 deficiency leads to upregulation of leukemia inhibitory factor-stimulated phosphatidylinositol 3-kinase/Akt, Erk5, and Stat3 pathways in cardiomyocytes. Insulin resistance and impaired glucose uptake in Shp2-deficient mice are at least in part due to impaired protein kinase C-zeta/lambda and AMP-kinase activities in striated muscle. Thus, we have generated a mouse line modeling human patients suffering from cardiomyopathy and insulin resistance. This study reinforces a concept that a compound disease with multiple cardiovascular and metabolic disturbances can be caused by a defect in a single molecule such as Shp2, which modulates multiple signaling pathways initiated by cytokines and hormones.
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Pan Y, Carbe C, Powers A, Zhang EE, Esko JD, Grobe K, Feng GS, Zhang X. Bud specific N-sulfation of heparan sulfate regulates Shp2-dependent FGF signaling during lacrimal gland induction. Development 2007; 135:301-10. [PMID: 18077586 DOI: 10.1242/dev.014829] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Preferential outgrowth of the bud cells forms the basis of branching morphogenesis. Here, we show that lacrimal gland development requires specific modification of heparan sulfates by Ndst genes at the tip of the lacrimal gland bud. Systemic and conditional knockout experiments demonstrate the tissue specific requirement of Ndst1 and Ndst2 in the lacrimal gland epithelial, but not mesenchymal, cells, and the functional importance of Ndst1 in Fgf10-Fgfr2b, but not of Fgf1-Fgfr2b, complex formation. Consistent with this, Fgf10-induced ectopic lacrimal gland budding in explant cultures is dependent upon Ndst gene dose, and epithelial deletion of Fgfr2 abolishes lacrimal gland budding, its specific modification of heparan sulfate and its phosphorylation of Shp2 (Ptpn11 - Mouse Genome Informatics). Finally, we show that genetic ablation of Ndst1, Fgfr2 or Shp2 disrupts ERK signaling in lacrimal gland budding. Given the evolutionarily conserved roles of these genes, the localized activation of the Ndst-Fgfr-Shp2 genetic cascade is probably a general regulatory mechanism of FGF signaling in branching morphogenesis.
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Affiliation(s)
- Yi Pan
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Ke Y, Zhang EE, Hagihara K, Wu D, Pang Y, Klein R, Curran T, Ranscht B, Feng GS. Deletion of Shp2 in the brain leads to defective proliferation and differentiation in neural stem cells and early postnatal lethality. Mol Cell Biol 2007; 27:6706-17. [PMID: 17646384 PMCID: PMC2099234 DOI: 10.1128/mcb.01225-07] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The intracellular signaling controlling neural stem/progenitor cell (NSC) self-renewal and neuronal/glial differentiation is not fully understood. We show here that Shp2, an introcellular tyrosine phosphatase with two SH2 domains, plays a critical role in NSC activities. Conditional deletion of Shp2 in neural progenitor cells mediated by Nestin-Cre resulted in early postnatal lethality, impaired corticogenesis, and reduced proliferation of progenitor cells in the ventricular zone. In vitro analyses suggest that Shp2 mediates basic fibroblast growth factor signals in stimulating self-renewing proliferation of NSCs, partly through control of Bmi-1 expression. Furthermore, Shp2 regulates cell fate decisions, by promoting neurogenesis while suppressing astrogliogenesis, through reciprocal regulation of the Erk and Stat3 signaling pathways. Together, these results identify Shp2 as a critical signaling molecule in coordinated regulation of progenitor cell proliferation and neuronal/astroglial cell differentiation.
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Affiliation(s)
- Yuehai Ke
- Burnham Institute for Medical Research, La Jolla, CA 92037, USA
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Feng GS. Shp2-mediated molecular signaling in control of embryonic stem cell self-renewal and differentiation. Cell Res 2007; 17:37-41. [PMID: 17211446 DOI: 10.1038/sj.cr.7310140] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
A key issue to be addressed in stem cell biology is the molecular signaling mechanism controlling embryonic stem (ES) cell pluripotency. Stem cell properties are dictated by specific transcription factors and epigenetic processes such as DNA methylation and chromatin remodeling. Several cytokines/growth factors have been identified as critical ES cell regulators. However, there is a gap in our knowledge of the intracellular signaling pathways linking extracellular signals to transcriptional regulation in ES cells. This short review discusses the physiological role of Shp2, a cytoplasmic tyrosine phosphatase, in the molecular switch governing ES cell self-renewal versus differentiation. Shp2 promotes ES cell differentiation, mainly through bi-directional modulation of Erk and Stat3 pathways. Deletion of Shp2 in mouse ES cells results in more efficient self-renewal. This observation provides the impetus to develop Shp2 inhibitors for maintenance and amplification of ES cells in culture.
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Affiliation(s)
- Gen-Sheng Feng
- Programs in Signal Transduction and Stem Cells and Regeneration, Burnham Institute for Medical Research, 10901 N. Torrey Pines Rd, La Jolla, CA 92037, USA.
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Abstract
Elucidation of the molecular mechanisms underlying carcinogenesis has benefited tremendously from the identification and characterization of oncogenes and tumor suppressor genes. One new advance in this field is the identification of PTPN11 as the first proto-oncogene that encodes a cytoplasmic tyrosine phosphatase with 2 Src-homology 2 (SH2) domains (Shp2). This tyrosine phosphatase was previously shown to play an essential role in normal hematopoiesis. More recently, somatic missense PTPN11 gain-of-function mutations have been detected in leukemias and rarely in solid tumors, and have been found to induce aberrant hyperactivation of the Ras-Erk pathway. This progress represents another milestone in the leukemia/cancer research field and provides a fresh view on the molecular mechanisms underlying cell transformation.
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Affiliation(s)
- Rebecca J Chan
- Department of Pediatrics, the Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, USA
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Abstract
Most obese subjects exhibit leptin resistance, thus restricting the value of direct leptin administration for treatment of obesity. Understanding the leptin signalling mechanism has become crucial for design of novel therapeutic strategies for leptin-resistant/obese patients. The SH2-containing cytoplasmic tyrosine phosphatase Shp2 has recently been shown to play a critical role in leptin signalling and functions in hypothalamic control of energy balance and metabolism. Shp2 appears to downregulate the LepRb-STAT3 pathway while promoting extracellular-regulated kinase activation by leptin. Overall, Shp2 is a leptin signal enhancer, as evidenced by the obese and hyperleptinemic phenotype of mutant mice with Shp2 deleted in postmitotic forebrain neurons. Pharmaceutical enhancement of Shp2 activity may be a new approach worthy of consideration in clinical treatment of leptin resistance and obesity. This article discusses the significance of recent experimental data on Shp2 and also the prospects for using Shp2 as a therapeutic target for obese patients.
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Affiliation(s)
- Gen-Sheng Feng
- Program in Signal Transduction, The Burnham Institute for Medical Research, La Jolla, CA 92037, USA.
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Xu R, Yu Y, Zheng S, Zhao X, Dong Q, He Z, Liang Y, Lu Q, Fang Y, Gan X, Xu X, Zhang S, Dong Q, Zhang X, Feng GS. Overexpression of Shp2 tyrosine phosphatase is implicated in leukemogenesis in adult human leukemia. Blood 2005; 106:3142-9. [PMID: 16030196 PMCID: PMC1895328 DOI: 10.1182/blood-2004-10-4057] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Shp2 tyrosine phosphatase plays a critical role in hematopoiesis, and dominant active mutations have been detected in the human gene PTPN11, encoding Shp2, in child leukemia patients. We report here that although no such mutations were detected in 44 adult leukemia patients screened, Shp2 expression levels were significantly elevated in primary leukemia cells and leukemia cell lines, as compared with normal hematopoietic progenitor cells. The Shp2 protein amounts correlated well with the hyperproliferative capacity but were inversely associated with the differentiation degree of leukemia cells. Suppression of Shp2 expression induced apoptosis and inhibition of leukemic cell clonogenic growth. Notably, the majority of Shp2 was preferentially localized to the plasma membrane and was constitutively phosphorylated on tyrosine in leukemia cells, and also in normal hematopoietic cells following mitogenic stimulation. Based on these results, we propose that aberrantly increased expression of Shp2 may contribute, collaboratively with other factors, to leukemogenesis.
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Affiliation(s)
- Rongzhen Xu
- Department of Hematology, Second Affiliated Hospital, School of Medicine, Cancer Institute, Zhejiang University, Zhejiang Academy of Medical Sciences, Hangzhou, Zhejiang 310009, China.
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