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Li S, Zhao S, Liang N, Zhang S, Zhang L, Zhou L, Liu A, Cao X, Tian J, Yu Y, Fan Z, Xiao K, Wang M, Zhao H, Bai R, Sun J. SPRY4 inhibits and sensitizes the primary KIT mutants in gastrointestinal stromal tumors (GISTs) to imatinib. Gastric Cancer 2023; 26:677-690. [PMID: 37222910 DOI: 10.1007/s10120-023-01402-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/15/2023] [Indexed: 05/25/2023]
Abstract
BACKGROUND KIT is frequently mutated in gastrointestinal stromal tumors (GISTs), and the treatment of GISTs largely relies on targeting KIT currently. In this study, we aimed to investigate the role of sprouty RTK signaling antagonist 4 (SPRY4) in GISTs and related mechanisms. METHODS Ba/F3 cells and GIST-T1 cell were used as cell models, and mice carrying germline KIT/V558A mutation were used as animal model. Gene expression was examined by qRT-PCR and western blot. Protein association was examined by immunoprecipitation. RESULTS Our study revealed that KIT increased the expression of SPRY4 in GISTs. SPRY4 was found to bind to both wild-type KIT and primary KIT mutants in GISTs, and inhibited KIT expression and activation, leading to decreased cell survival and proliferation mediated by KIT. We also observed that inhibition of SPRY4 expression in KITV558A/WT mice led to increased tumorigenesis of GISTs in vivo. Moreover, our results demonstrated that SPRY4 enhanced the inhibitory effect of imatinib on the activation of primary KIT mutants, as well as on cell proliferation and survival mediated by the primary KIT mutants. However, in contrast to this, SPRY4 did not affect the expression and activation of drug-resistant secondary KIT mutants, nor did it affect the sensitivity of secondary KIT mutants to imatinib. These findings suggested that secondary KIT mutants regulate a different downstream signaling cascade than primary KIT mutants. CONCLUSIONS Our results suggested that SPRY4 acts as negative feedback of primary KIT mutants in GISTs by inhibiting KIT expression and activation. It can increase the sensitivity of primary KIT mutants to imatinib. In contrast, secondary KIT mutants are resistant to the inhibition of SPRY4.
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Affiliation(s)
- Shujing Li
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
- Department of Pediatrics, The General Hospital of Ningxia Medical University, Yinchuan, China
| | - Sien Zhao
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Nianhai Liang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Shaoting Zhang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Liangying Zhang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Liangji Zhou
- Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Anbu Liu
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Xu Cao
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Jinhai Tian
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Yuanyuan Yu
- Department of Emergency, The General Hospital of Ningxia Medical University, Yinchuan, China
| | - Zhaoyang Fan
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Kun Xiao
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Ming Wang
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Hui Zhao
- Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ru Bai
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Jianmin Sun
- NHC Key Laboratory of Metabolic Cardiovascular Diseases Research, Science and Technology Center, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China.
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Tieniber AD, Rossi F, Hanna AN, Liu M, Etherington MS, Loo JK, Param N, Zeng S, Do K, Wang L, DeMatteo RP. Multiple intratumoral sources of kit ligand promote gastrointestinal stromal tumor. Oncogene 2023; 42:2578-2588. [PMID: 37468679 DOI: 10.1038/s41388-023-02777-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 06/22/2023] [Accepted: 07/05/2023] [Indexed: 07/21/2023]
Abstract
Gastrointestinal stromal tumor (GIST) is the most common human sarcoma and is typically driven by a single mutation in the Kit or PDGFRA receptor. While highly effective, tyrosine kinase inhibitors (TKIs) are not curative. The natural ligand for the Kit receptor is Kit ligand (KitL), which exists in both soluble and membrane-bound forms. While KitL is known to stimulate human GIST cell lines in vitro, we used a genetically engineered mouse model of GIST containing a common human KIT mutation to investigate the intratumoral sources of KitL, importance of KitL during GIST oncogenesis, and contribution of soluble KitL to tumor growth in vivo. We discovered that in addition to tumor cells, endothelia and smooth muscle cells produced KitL in KitV558Δ/+ tumors, even after imatinib therapy. Genetic reduction of total KitL in tumor cells of KitV558Δ/+ mice impaired tumor growth in vivo. Similarly, genetic reduction of tumor cell soluble KitL in KitV558Δ/+ mice decreased tumor size. By RNA sequencing, quantitative PCR, and immunohistochemistry, KitL expression was heterogeneous in human GIST specimens. In particular, PDGFRA-mutant tumors had much higher KitL expression than Kit-mutant tumors, suggesting the benefit of Kit activation in the absence of mutant KIT. Serum KitL was higher in GIST patients with tumors resistant to imatinib and in those with tumors expressing more KitL RNA. Overall, KitL supports the growth of GIST at baseline and after imatinib therapy and remains a potential biomarker and therapeutic target.
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Affiliation(s)
- Andrew D Tieniber
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Ferdinando Rossi
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Andrew N Hanna
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Marion Liu
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Mark S Etherington
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Jennifer K Loo
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Nesteene Param
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Shan Zeng
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Kevin Do
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Laura Wang
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Ronald P DeMatteo
- Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.
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Pan X, Liu JH. Identification of four key biomarkers and small molecule drugs in nasopharyngeal carcinoma by weighted gene co-expression network analysis. Bioengineered 2021; 12:3647-3661. [PMID: 34261404 PMCID: PMC8806459 DOI: 10.1080/21655979.2021.1949844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a heterogeneous carcinoma whose underlying molecular mechanisms involved in tumor initiation, progression, and migration are largely unclear. The aim of the present study was to identify key biomarkers and small-molecule drugs for screening, diagnosing, and treating NPC via gene expression profile analysis. Raw microarray data was used to identify 430 differentially expressed genes (DEGs) in the Gene Expression Omnibus (GEO) database. The key modules associated with histological grade and tumor stage were identified using weighted gene co-expression network analysis. qRT-PCR was used to verify the differential expression of hub genes. Gene ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and the connectivity map database were used to identify potential mechanisms and screen small-molecule drugs targeting hub genes. Functional enrichment analysis showed that genes in the green module were enriched in the regulation of cell cycle, p53 signaling pathway, and cell part morphogenesis. Four DEG-related hub genes (CRIP1, KITLG, MARK1, and PGAP1) in the green module, which were considered potential diagnostic biomarkers, were taken as the final hub genes. The expression levels of these four hub genes were verified via qRT-PCR, and the results were consistent with findings from the GEO analysis. Screening was also conducted to identify small-molecule drugs with potential therapeutic effects against NPC. In conclusion, four potential prognostic biomarkers and several candidate small-molecule drugs, which may provide new insights for NPC therapy, were identified.
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Affiliation(s)
- Xi Pan
- Department of Oncology, Xiangya Third Hospital, Central South University, Changsha, China
| | - Jian-Hao Liu
- School of Pharmaceutical Sciences of Central South University, Changsha, 410078, China
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4
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Taximaimaiti R, Abudujilile D, Maihemuti M, Abuliken X, Abudulimu H. Expression of AMHR2 and C-KIT in cervical lesions in Uyghur Women of Xinjiang, China. Medicine (Baltimore) 2018; 97:e10793. [PMID: 29851788 PMCID: PMC6393133 DOI: 10.1097/md.0000000000010793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Cervical cancer is one of the most common malignant tumors in women. Anti-Müllerian hormone receptor 2 (AMHR2) and C-Kit were two members of protein kinase which were reported increased in some cancers like ovarian carcinoma and breast cancer. The present study aimed to assess the expression of AMHR2 and c-Kit in cervical cancer of different differentiated degrees as well as in cervicitis sections. METHODS All the lesions were collected randomly during clinical observations in hospitals located in Xinjiang, China. Polymerase chain reaction (PCR) and immunohistochemical staining were used to detect AMHR2 and c-Kit expression in cervical samples from women who had been infected with human papilloma virus (HPV)16. The expression rate was compared between cervical cancer of well, moderately and poorly differentiated and cervicitis. RESULTS The average age of the patients was 45 years; ranged from 23 to 80. For AMHR2, all 17 cervicitis samples ranged from (++) to (++++), while cervical cancer showed 11 (+), 9 (++), 15 (+++),9 (++++), and 8 (-), which showed AMHR2 expression was lessen with the poorer of differentiation degree of cervical cancer (P < .05). For c-Kit, 18 cervicitis samples mainly expressed as (-) with none showed (+++) or (++++), while cervical cancer samples showed 7 (-), 6 (+), 1 (++), 2 (+++), and 8 (++++), which indicated c-Kit's expression increased with the reduction of cervical cancer's differentiation degree (P < .05). CONCLUSION AMHR2 might have some correlation with self defense of our body, while c-Kit might link with the potential invasive capacity of cervical cancer.
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Affiliation(s)
- Reyisha Taximaimaiti
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Dilinuer Abudujilile
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Muzhapaer Maihemuti
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
| | - Xiekelai Abuliken
- Seven-year Clinical Medicine of Class 2, Xinjiang Medical University, Urumqi, PR China
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CTHRC1 acts as a prognostic factor and promotes invasiveness of gastrointestinal stromal tumors by activating Wnt/PCP-Rho signaling. Neoplasia 2014; 16:265-78, 278.e1-13. [PMID: 24726140 DOI: 10.1016/j.neo.2014.03.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 02/26/2014] [Accepted: 03/03/2014] [Indexed: 01/15/2023] Open
Abstract
Gastrointestinal stromal tumors (GISTs) are the major gastrointestinal mesenchymal tumors with a variable malignancy ranging from a curable disorder to highly malignant sarcomas. Metastasis and recurrence are the main causes of death in GIST patients. To further explore the mechanism of metastasis and to more accurately estimate the recurrence risk of GISTs after surgery, the clinical significance and functional role of collagen triple helix repeat containing-1 (CTHRC1) in GIST were investigated. We found that CTHRC1 expression was gradually elevated as the risk grade of NIH classification increased, and was closely correlated with disease-free survival and overall survival in 412 GIST patients. In vitro experiments showed that recombinant CTHRC1 protein promoted the migration and invasion capacities of primary GIST cells. A luciferase reporter assay and pull down assay demonstrated that recombinant CTHRC1 protein activated noncanonical Wnt/PCP-Rho signaling but inhibited canonical Wnt signaling. The pro-motility effect of CTHRC1 on GIST cells was reversed by using a Wnt5a neutralizing antibody and inhibitors of Rac1 or ROCK. Taken together, these data indicate that CTHRC1 may serve as a new predictor of recurrence risk and prognosis in post-operative GIST patients and may play an important role in facilitating GIST progression. Furthermore, CTHRC1 promotes GIST cell migration and invasion by activating Wnt/PCP-Rho signaling, suggesting that the CTHRC1-Wnt/PCP-Rho axis may be a new therapeutic target for interventions against GIST invasion and metastasis.
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6
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Hayashi Y, Asuzu DT, Gibbons SJ, Aarsvold KH, Bardsley MR, Lomberk GA, Mathison AJ, Kendrick ML, Shen KR, Taguchi T, Gupta A, Rubin BP, Fletcher JA, Farrugia G, Urrutia RA, Ordog T. Membrane-to-nucleus signaling links insulin-like growth factor-1- and stem cell factor-activated pathways. PLoS One 2013; 8:e76822. [PMID: 24116170 PMCID: PMC3792098 DOI: 10.1371/journal.pone.0076822] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 08/29/2013] [Indexed: 11/29/2022] Open
Abstract
Stem cell factor (mouse: Kitl, human: KITLG) and insulin-like growth factor-1 (IGF1), acting via KIT and IGF1 receptor (IGF1R), respectively, are critical for the development and integrity of several tissues. Autocrine/paracrine KITLG-KIT and IGF1-IGF1R signaling are also activated in several cancers including gastrointestinal stromal tumors (GIST), the most common sarcoma. In murine gastric muscles, IGF1 promotes Kitl-dependent development of interstitial cells of Cajal (ICC), the non-neoplastic counterpart of GIST, suggesting cooperation between these pathways. Here, we report a novel mechanism linking IGF1-IGF1R and KITLG-KIT signaling in both normal and neoplastic cells. In murine gastric muscles, the microenvironment for ICC and GIST, human hepatic stellate cells (LX-2), a model for cancer niches, and GIST cells, IGF1 stimulated Kitl/KITLG protein and mRNA expression and promoter activity by activating several signaling pathways including AKT-mediated glycogen synthase kinase-3β inhibition (GSK3i). GSK3i alone also stimulated Kitl/KITLG expression without activating mitogenic pathways. Both IGF1 and GSK3i induced chromatin-level changes favoring transcriptional activation at the Kitl promoter including increased histone H3/H4 acetylation and H3 lysine (K) 4 methylation, reduced H3K9 and H3K27 methylation and reduced occupancy by the H3K27 methyltransferase EZH2. By pharmacological or RNA interference-mediated inhibition of chromatin modifiers we demonstrated that these changes have the predicted impact on KITLG expression. KITLG knock-down and immunoneutralization inhibited the proliferation of GIST cells expressing wild-type KIT, signifying oncogenic autocrine/paracrine KITLG-KIT signaling. We conclude that membrane-to-nucleus signaling involving GSK3i establishes a previously unrecognized link between the IGF1-IGF1R and KITLG-KIT pathways, which is active in both physiologic and oncogenic contexts and can be exploited for therapeutic purposes.
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Affiliation(s)
- Yujiro Hayashi
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - David T. Asuzu
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Simon J. Gibbons
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Kirsten H. Aarsvold
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Michael R. Bardsley
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Gwen A. Lomberk
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Angela J. Mathison
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Michael L. Kendrick
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, United States of America
| | - K. Robert Shen
- Department of Surgery, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Takahiro Taguchi
- Division of Human Health and Medical Science, Graduate School of Kuroshio Science, Kochi University, Nankoku, Kochi, Japan
| | - Anu Gupta
- Departments of Anatomic Pathology and Molecular Genetics, Lerner Research Institute and Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Brian P. Rubin
- Departments of Anatomic Pathology and Molecular Genetics, Lerner Research Institute and Taussig Cancer Center, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Jonathan A. Fletcher
- Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Gianrico Farrugia
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Raul A. Urrutia
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Tamas Ordog
- Enteric Neuroscience Program, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, United States of America
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States of America
- Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
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Kim A, Im DH, Kim K, Kim JY, Sol MY, Lee JH, Choi KU. Usefulness of anti-phosphohistone H3 immunoreactivity to determine mitotic rate in gastrointestinal stromal tumors. ACTA ACUST UNITED AC 2012. [DOI: 10.1111/baap.12003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ahrong Kim
- Department of Pathology; Pusan National University Hospital; Pusan National University School of Medicine; Busan
| | - Dong Han Im
- Department of Medicine, The Graduate School of Medicine; Pusan National University
| | - Kyungbin Kim
- Department of Pathology; Pusan National University Hospital; Pusan National University School of Medicine; Busan
| | - Jee Yeon Kim
- Department of Pathology; Pusan National University School of Medicine
| | - Mee Young Sol
- Department of Pathology; Pusan National University School of Medicine
| | - Jeong Hee Lee
- Department of Pathology, Pusan National University Yangsan Hospital; Pusan National University School of Medicine; Yangsan; Korea
| | - Kyung Un Choi
- Department of Pathology; Pusan National University School of Medicine
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Binato R, de Souza Fernandez T, Lazzarotto-Silva C, Du Rocher B, Mencalha A, Pizzatti L, Bouzas LF, Abdelhay E. Stability of human mesenchymal stem cells during in vitro culture: considerations for cell therapy. Cell Prolif 2012; 46:10-22. [PMID: 23163975 DOI: 10.1111/cpr.12002] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/08/2012] [Indexed: 01/30/2023] Open
Abstract
Ex vivo expansion and manipulation of human mesenchymal stem cells are important approaches to immunoregulatory and regenerative cell therapies. Although these cells show great potential for use, issues relating to their overall nature emerge as problems in the field. The need for extensive cell quantity amplification in vitro to obtain sufficient cell numbers for use, poses a risk of accumulating genetic and epigenetic abnormalities that could lead to sporadic malignant cell transformation. In this study, we have examined human mesenchymal stem cells derived from bone marrow, over extended culture time, using cytogenetic analyses, mixed lymphocyte reactions, proteomics and gene expression assays to determine whether the cultures would retain their potential for use in subsequent passages. Results indicate that in vitro cultures of these cells demonstrated chromosome variability after passage 4, but their immunomodulatory functions and differentiation capacity were maintained. At the molecular level, changes were observed from passage 5 on, indicating initiation of differentiation. Together, these results lead to the hypothesis that human mesenchymal stem cells cultures can be used successfully in cell therapy up to passage 4. However, use of cells from higher passages would have to be analysed case by case.
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Affiliation(s)
- R Binato
- Bone Marrow Transplantation Unit, National Cancer Institute (INCA), Rio de Janeiro, Brazil.
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9
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Hou XW, Bai CG, Liu XH, Qiu C, Huang L, Xu JJ, Ma DAL. Expression of stem cell factor in gastrointestinal stromal tumors: Implications for proliferation and imatinib resistance. Oncol Lett 2012; 5:552-558. [PMID: 23420128 PMCID: PMC3572958 DOI: 10.3892/ol.2012.1019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 10/31/2012] [Indexed: 01/13/2023] Open
Abstract
KIT autophosphorylation caused by mutation of KIT is considered to be a critical mechanism for the oncogenesis of gastrointestinal stromal tumors (GISTs). However, little is known regarding whether stem cell factor (SCF), the KIT ligand, is able to induce the proliferation of GIST cells by activating the wild-type KIT receptor in GISTs. Imatinib, a tyrosine kinase inhibitor, has been demonstrated to be effective as treatment for the majority of GISTs. However, primary resistance to imatinib in GISTs with wild-type KIT and acquired resistance in GISTs with mutant KIT are becoming increasingly significant problems. The aims of this study were to detect the expression and function of SCF in 68 GIST samples, and to explore the relationship between SCF activity and imatinib resistance using immunohistochemical staining and western blot analysis. Results showed abundant expression of SCF in GISTs and demonstrated that SCF is capable of enhancing GIST cell proliferation. Similar to its ineffectiveness in wild-type GISTs, imatinib also failed to inhibit SCF-induced KIT activation in GISTs with mutant KIT. We also found increased SCF expression in GIST cells treated with imatinib. Overall, our results indicated that SCF-induced KIT activation is a novel essential pathway for the proliferation of GISTs. Imatinib was not able to inhibit the activity of SCF, while it promoted the expression of SCF, which may have contributed to acquired imatinib resistance.
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Affiliation(s)
- Xiao-Wei Hou
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai 200433; ; Department of Oncology, 401 Hospital of PLA, Qingdao, Shandong 266071
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10
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Bai CG, Hou XW, Wang F, Qiu C, Zhu Y, Huang L, Zhao J, Xu JJ, Ma DL. Stem cell factor-mediated wild-type KIT receptor activation is critical for gastrointestinal stromal tumor cell growth. World J Gastroenterol 2012; 18:2929-37. [PMID: 22736916 PMCID: PMC3380320 DOI: 10.3748/wjg.v18.i23.2929] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Revised: 02/27/2012] [Accepted: 03/19/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To clarify the biological role of stem cell factor (SCF)-mediated wild-type KIT receptor activation in gastrointestinal stromal tumor (GIST) growth.
METHODS: The co-expression of wild-type KIT receptor and SCF was evaluated in 51 GIST samples using mutation analysis and immunohistochemistry, and the results were correlated with clinicopathological parameters, including the mitotic count, proliferative index (Ki-67 immunohistochemical staining), mitotic index (phospho-histone H3 immunohistochemical staining) and apoptotic index (terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling). Using primary cultured GIST cells, the effect of SCF-mediated wild-type KIT receptor activation was determined by western blotting, methyl thiazolyl tetrazolium (MTT), and apoptosis assays.
RESULTS: We found that wild-type KIT receptor and SCF protein were expressed in 100% and 76.5% of the 51 GIST samples, respectively, and the co-expression of wild-type KIT receptor and SCF was associated with known indicators of poor prognosis, including larger tumor size (P = 0.0118), higher mitotic count (P = 0.0058), higher proliferative index (P = 0.0012), higher mitotic index (P = 0.0282), lower apoptosis index (P = 0.0484), and increased National Institutes of Health risk level (P = 0.0012). We also found that the introduction of exogenous SCF potently increased KIT kinase activity, stimulated cell proliferation (P < 0.01) and inhibited apoptosis (P < 0.01) induced by serum starvation, while a KIT immunoblocking antibody suppressed proliferation (P = 0.01) and promoted apoptosis (P < 0.01) in cultured GIST cells.
CONCLUSION: SCF-mediated wild-type KIT receptor activation plays an important role in GIST cell growth. The inhibition of SCF-mediated wild-type KIT receptor activation may prove to be particularly important for GIST therapy.
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Jelly ND, Hussain II, Eremin J, Eremin O, El-Sheemy M. The stem cell factor antibody enhances the chemotherapeutic effect of adriamycin on chemoresistant breast cancer cells. Cancer Cell Int 2012; 12:21. [PMID: 22642642 PMCID: PMC3413589 DOI: 10.1186/1475-2867-12-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 05/29/2012] [Indexed: 11/18/2022] Open
Abstract
Background The outcome of chemotherapy in breast cancer is strongly influenced by multidrug resistance (MDR). Several surrogate markers of chemoresistance have been identified including - CD24 (cluster differentiation 24) expression, stem cell growth factor (SCF), B-cell lymphocyte protein 2 (Bcl-2) and annexin V. The present study aimed to examine the expression of CD24 in the sensitive breast cancer cell line MCF-7 (Michigan Foudation-7) and MCF-7/adriamycin resistant (MCF-7/AdrRes) cells, and, if minimal effective doses of the anthracycline drug adriamycin (0.579 μM and 88.2 μM) would be enhanced by the antibody to SCF (anti-SCF). Methods CD24 expression was analysed by flow cytometry. Both Bcl-2 and annexin V protein expression were quantitatively assessed by the enzyme-linked immunosorbent assay (ELISA). Results In MCF-7/AdrRes cells the expression of CD24 was significantly higher compared to MCF-7 cells, 86.6% and 16.3% (p < 0.001), respectively. Bcl-2 expression was significantly increased in the presence of adriamycin and SCF (p < 0.038) and decreased in the presence of adriamycin and anti-SCF. When adriamycin, anti-SCF and SCF were combined or when adriamycin was used alone the decrease in Bcl-2 expression was insignificantly altered. In the presence of both adriamycin and SCF the expression of annexin V was decreased. However, it was significantly increased in the presence of adriamycin and anti-SCF (p < 0.042), as well as adriamycin, anti-SCF and SCF combined. In MCF-7 cells the effect of adriamycin alone or with either SCF, anti-SCF or anti-SCF or SCF combined, did not significantly alter the expression of Bcl-2. However, in the presence of both adriamycin and SCF the expression of annexin V was decreased, but was significantly increased in the presence of adriamycin and anti-SCF (p < 0.001), adriamycin, anti-SCF and SCF combined and adriamycin alone. Our results demonstrate that anti-SCF with low dose of adriamycin reduces Bcl-2 expression in MCF-7/AdrRes cells and increases annexin V expression in both MCF7/AdrRes and MCF-7 cells. Conclusion Adding anti-SCF to the chemotherapeutic regime of adriamycin may strongly enhance its chemotherapeutic effect in the treatment of patients with breast cancer.
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Affiliation(s)
- Neil D Jelly
- University of Lincoln, Brayford Pool, Lincoln, LN6 7TS, UK.
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12
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Iqbal SA, Manning C, Syed F, Kolluru V, Hayton M, Watson S, Bayat A. Identification of mesenchymal stem cells in perinodular fat and skin in Dupuytren's disease: a potential source of myofibroblasts with implications for pathogenesis and therapy. Stem Cells Dev 2011; 21:609-22. [PMID: 21612554 DOI: 10.1089/scd.2011.0140] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dupuytren's disease (DD) is a fibroproliferative disorder characterized by aberrant proliferation of myofibroblasts, the source of which remains unknown. Recent studies indicate that circulating and tissue-resident mesenchymal stem cells (MSCs) can differentiate into myofibroblasts. Therefore, the aim of this study was to profile MSCs from phenotypically distinct DD sites including cord, nodule, skin overlying nodule (SON), and perinodular fat (PNF) compared with unaffected internal controls, that is, distant palmar fat (DPF) and transverse palmar fascia (Skoog's fibers) as well as external control carpal tunnel (CT) tissue including skin, fat, and fascia. Freshly isolated primary fibroblasts as well as cells grown up to passage 5 (P5) from DD (n=27) and CT (n=14) samples were analyzed for the presence of established MSC markers CD73, CD90, and CD105 and absence of hematopoietic marker CD34 using fluorescence-activated cell sorting, in-cell quantitative western blotting, immunohistochemistry, and immunocytochemistry. Freshly isolated cells from SON, PNF, and cord biopsies had a higher number of CD34(-)73(+)90(+)105(+) cells compared with Skoog's fibers and CT controls. P3 cells obtained from all DD biopsies compared with CT samples differentiated into osteocytes, adipocytes, and chondrocytes. P3 cord and nodule cells expressed intense α-smooth muscle actin staining compared with skin and fat cells. Stem cell markers including stem cell factor, MSC-homing marker CXCR4, and Wnt/β-catenin downregulator Dkk-1 were all upregulated in SON and PNF compared with CT skin and CT fat, respectively, as shown by real-time quantitative polymerase chain reaction. However, osteogenic marker OSF-1 had a significantly higher expression in the PNF (P=0.002) and cord (P=0.01) compared with the nodule. In conclusion, we have shown the presence of MSCs in specific DD tissue phenotypes compared with internal and external control tissue. These findings provide preliminary support for a potential alternative source of disease myofibroblasts originating from sites such as SON and PNF as opposed to palmar fascia alone.
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Affiliation(s)
- Syed Amir Iqbal
- Plastic and Reconstructive Surgery Research, Manchester Interdisciplinary Biocentre, University of Manchester, Manchester, United Kingdom
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Asuzu DT, Hayashi Y, Izbeki F, Popko LN, Young DL, Bardsley MR, Lorincz A, Kuro-o M, Linden DR, Farrugia G, Ordog T. Generalized neuromuscular hypoplasia, reduced smooth muscle myosin and altered gut motility in the klotho model of premature aging. Neurogastroenterol Motil 2011; 23:e309-23. [PMID: 21605285 PMCID: PMC3149585 DOI: 10.1111/j.1365-2982.2011.01730.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Gastrointestinal symptoms, particularly constipation, increase with aging, but their underlying mechanisms are poorly understood due to lack of experimental models. Previously we established the progeric klotho mouse as a model of aging-associated anorexia and gastric dysmotility. We also detected reduced fecal output in these animals; therefore, the aim of this study was to investigate in vivo function and cellular make-up of the small intestinal and colonic neuromuscular apparatus. METHODS Klotho expression was studied by RT-PCR and immunohistochemistry. Motility was assessed by dye transit and bead expulsion. Smooth muscle and neuron-specific gene expression was studied by Western immunoblotting. Interstitial cells of Cajal (ICC) and precursors were analyzed by flow cytometry, confocal microscopy, and three-dimensional reconstruction. HuC/D(+) myenteric neurons were enumerated by fluorescent microscopy. KEY RESULTS Klotho protein was detected in neurons, smooth muscle cells, and some ICC classes. Small intestinal transit was slower but whole-gut transit of klotho mice was accelerated due to faster colonic transit and shorter intestinal lengths, apparent only after weaning. Fecal water content remained normal despite reduced output. Smooth muscle myosin expression was reduced. ICC, ICC precursors, as well as nitrergic and cholinergic neurons maintained their normal proportions in the shorter intestines. CONCLUSIONS & INFERENCES Progeric klotho mice express less contractile proteins and develop generalized intestinal neuromuscular hypoplasia mainly arising from stunted postweaning growth. As reduced fecal output in these mice occurs in the presence of accelerated colonic and whole-gut transit, it likely reflects reduced food intake rather than intestinal dysmotility.
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Affiliation(s)
- David T. Asuzu
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Yujiro Hayashi
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Ferenc Izbeki
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Laura N. Popko
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - David L. Young
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Michael R. Bardsley
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Andrea Lorincz
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Makoto Kuro-o
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - David R. Linden
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - Gianrico Farrugia
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - Tamas Ordog
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA,Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
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Krasagakis K, Fragiadaki I, Metaxari M, Krüger-Krasagakis S, Tzanakakis GN, Stathopoulos EN, Eberle J, Tavernarakis N, Tosca AD. KIT receptor activation by autocrine and paracrine stem cell factor stimulates growth of merkel cell carcinoma in vitro. J Cell Physiol 2011; 226:1099-109. [DOI: 10.1002/jcp.22431] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Bardsley MR, Horváth VJ, Asuzu DT, Lorincz A, Redelman D, Hayashi Y, Popko LN, Young DL, Lomberk GA, Urrutia RA, Farrugia G, Rubin BP, Ordog T. Kitlow stem cells cause resistance to Kit/platelet-derived growth factor alpha inhibitors in murine gastrointestinal stromal tumors. Gastroenterology 2010. [PMID: 20621681 DOI: 10.1053/j.gastro.2010.05.08336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Gastrointestinal stromal tumors (GIST) are related to interstitial cells of Cajal (ICC) and often contain activating stem cell factor receptor (Kit) or platelet-derived growth factor receptor alpha (Pdgfra) mutations. Kit/Pdgfra inhibitors such as imatinib mesylate have increased progression-free survival in metastatic GIST but are not curative. In mouse models we investigated whether Kit(low) ICC progenitors could represent an inherently Kit/Pdgfra inhibitor-resistant reservoir for GIST. METHODS Isolated Kit(low)Cd44(+)Cd34(+) cells were characterized after serial cloning. The tumorigenic potential of spontaneously transformed cells was investigated in nude mice. The Kit(low)Cd44(+)Cd34(+) cells' responsiveness to Kit activation and blockade was studied by enumerating them in Kit(K641E) mice (a GIST model), in mice with defective Kit signaling, and pharmacologically. RESULTS Single isolated Kit(low)Cd44(+)Cd34(+) cells were clonogenic and capable of self-renewal and differentiation into ICC. In nude mice, spontaneously transformed cells formed malignant tumors expressing GIST markers. The Kit(low)Cd44(+)Cd34(+) cells were resistant to in vitro Kit blockade, including by imatinib, and occurred in normal numbers in mice with reduced Kit signaling. In Kit(K641E) mice, the mutant ICC stem cells were grossly hyperplastic but remained imatinib-resistant. In contrast, the cancer stem, cell-targeting drug salinomycin blocked the proliferation of Kit(low)Cd44(+)Cd34(+) cells and increased their sensitivity to imatinib. CONCLUSIONS Kit(low)Cd44(+)Cd34(+) progenitors are true stem cells for normal and hyperplastic ICC and give rise to GIST. Resistance to Kit/Pdgfra inhibitors is inherent in GIST and is caused by the native ICC stem cells' lack of dependence on Kit for survival, which is maintained after the acquisition of oncogenic Kit mutation. Cancer stem cell drugs may target these cells.
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Affiliation(s)
- Michael R Bardsley
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
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16
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Bardsley MR, Horváth VJ, Asuzu DT, Lorincz A, Redelman D, Hayashi Y, Popko LN, Young DL, Lomberk GA, Urrutia RA, Farrugia G, Rubin BP, Ordog T. Kitlow stem cells cause resistance to Kit/platelet-derived growth factor alpha inhibitors in murine gastrointestinal stromal tumors. Gastroenterology 2010; 139:942-52. [PMID: 20621681 PMCID: PMC2933938 DOI: 10.1053/j.gastro.2010.05.083] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 05/11/2010] [Accepted: 05/27/2010] [Indexed: 01/13/2023]
Abstract
BACKGROUND & AIMS Gastrointestinal stromal tumors (GIST) are related to interstitial cells of Cajal (ICC) and often contain activating stem cell factor receptor (Kit) or platelet-derived growth factor receptor alpha (Pdgfra) mutations. Kit/Pdgfra inhibitors such as imatinib mesylate have increased progression-free survival in metastatic GIST but are not curative. In mouse models we investigated whether Kit(low) ICC progenitors could represent an inherently Kit/Pdgfra inhibitor-resistant reservoir for GIST. METHODS Isolated Kit(low)Cd44(+)Cd34(+) cells were characterized after serial cloning. The tumorigenic potential of spontaneously transformed cells was investigated in nude mice. The Kit(low)Cd44(+)Cd34(+) cells' responsiveness to Kit activation and blockade was studied by enumerating them in Kit(K641E) mice (a GIST model), in mice with defective Kit signaling, and pharmacologically. RESULTS Single isolated Kit(low)Cd44(+)Cd34(+) cells were clonogenic and capable of self-renewal and differentiation into ICC. In nude mice, spontaneously transformed cells formed malignant tumors expressing GIST markers. The Kit(low)Cd44(+)Cd34(+) cells were resistant to in vitro Kit blockade, including by imatinib, and occurred in normal numbers in mice with reduced Kit signaling. In Kit(K641E) mice, the mutant ICC stem cells were grossly hyperplastic but remained imatinib-resistant. In contrast, the cancer stem, cell-targeting drug salinomycin blocked the proliferation of Kit(low)Cd44(+)Cd34(+) cells and increased their sensitivity to imatinib. CONCLUSIONS Kit(low)Cd44(+)Cd34(+) progenitors are true stem cells for normal and hyperplastic ICC and give rise to GIST. Resistance to Kit/Pdgfra inhibitors is inherent in GIST and is caused by the native ICC stem cells' lack of dependence on Kit for survival, which is maintained after the acquisition of oncogenic Kit mutation. Cancer stem cell drugs may target these cells.
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Affiliation(s)
- Michael R. Bardsley
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Viktor J. Horváth
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - David T. Asuzu
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Andrea Lorincz
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA, Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Doug Redelman
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Yujiro Hayashi
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Laura N. Popko
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - David L. Young
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Gwen A. Lomberk
- Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Raul A. Urrutia
- Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
| | - Gianrico Farrugia
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - Brian P. Rubin
- Departments of Anatomic Pathology and Molecular Genetics, Lerner Research Institute and Taussig Cancer Center, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Tamas Ordog
- Enteric Neuroscience Program and Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA, Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
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Dongiovanni P, Fracanzani AL, Cairo G, Megazzini CP, Gatti S, Rametta R, Fargion S, Valenti L. Iron-dependent regulation of MDM2 influences p53 activity and hepatic carcinogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2009. [PMID: 20019189 DOI: 10.2353/amjpath.2010.090249.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Iron overload is a risk factor for hepatocarcinoma, but the pathways involved are poorly characterized. Gene expression analysis in immortalized mouse hepatocytes exposed to iron or the iron chelator deferoxamine revealed that iron downregulated, whereas deferoxamine upregulated, mRNA levels of mouse double minute gene 2 (MDM2), the ubiquitin ligase involved in the degradation of the oncosuppressor p53. Regulation of MDM2 by iron status was observed at protein levels in mouse hepatocytes and rat liver, and was associated with specular changes in p53 expression. Iron dependent regulation of MDM2/p53 was confirmed ex-vivo in human monocytes, by manipulation of iron pool and in a genetic model of iron deficiency, leading to modulation of p53 target genes involved in the antioxidant response and apoptosis. Iron status influenced p53 ubiquitination and degradation rate, and the MDM2 inhibitor nutlin increased p53 levels in iron-depleted cells. Furthermore, nutlin enhanced the antiproliferative activity of deferoxamine in HepG2 hepatoblastoma cells. The MDM2 -309T > G promoter polymorphism, determining increased MDM2 and lower p53 activity, was associated with higher risk of hepatocarcinoma in cirrhotic patients with hemochromatosis, and with HFE mutations in patients with hepatocarcinoma without hemochromatosis, suggesting an interaction between MDM2 and iron in the pathogenesis of hepatocarcinoma. In conclusion, iron status influences p53 activity and antioxidant response by modulating MDM2 expression. MDM2 inhibitors may enhance the antiproliferative activity of iron chelators.
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Affiliation(s)
- Paola Dongiovanni
- Center of Metabolic and Liver Diseases, Department of Internal Medicine, University of Milano, Ospedale Policlinico Mangiagalli e Regina Elena Fondazione IRCCS, 20122 Milano, Italy
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Dongiovanni P, Fracanzani AL, Cairo G, Megazzini CP, Gatti S, Rametta R, Fargion S, Valenti L. Iron-dependent regulation of MDM2 influences p53 activity and hepatic carcinogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2009. [PMID: 20019189 DOI: 10.2353/amjpath.2010.090249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Iron overload is a risk factor for hepatocarcinoma, but the pathways involved are poorly characterized. Gene expression analysis in immortalized mouse hepatocytes exposed to iron or the iron chelator deferoxamine revealed that iron downregulated, whereas deferoxamine upregulated, mRNA levels of mouse double minute gene 2 (MDM2), the ubiquitin ligase involved in the degradation of the oncosuppressor p53. Regulation of MDM2 by iron status was observed at protein levels in mouse hepatocytes and rat liver, and was associated with specular changes in p53 expression. Iron dependent regulation of MDM2/p53 was confirmed ex-vivo in human monocytes, by manipulation of iron pool and in a genetic model of iron deficiency, leading to modulation of p53 target genes involved in the antioxidant response and apoptosis. Iron status influenced p53 ubiquitination and degradation rate, and the MDM2 inhibitor nutlin increased p53 levels in iron-depleted cells. Furthermore, nutlin enhanced the antiproliferative activity of deferoxamine in HepG2 hepatoblastoma cells. The MDM2 -309T > G promoter polymorphism, determining increased MDM2 and lower p53 activity, was associated with higher risk of hepatocarcinoma in cirrhotic patients with hemochromatosis, and with HFE mutations in patients with hepatocarcinoma without hemochromatosis, suggesting an interaction between MDM2 and iron in the pathogenesis of hepatocarcinoma. In conclusion, iron status influences p53 activity and antioxidant response by modulating MDM2 expression. MDM2 inhibitors may enhance the antiproliferative activity of iron chelators.
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Affiliation(s)
- Paola Dongiovanni
- Center of Metabolic and Liver Diseases, Department of Internal Medicine, University of Milano, Ospedale Policlinico Mangiagalli e Regina Elena Fondazione IRCCS, 20122 Milano, Italy
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Dongiovanni P, Fracanzani AL, Cairo G, Megazzini CP, Gatti S, Rametta R, Fargion S, Valenti L. Iron-dependent regulation of MDM2 influences p53 activity and hepatic carcinogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2009; 176:1006-17. [PMID: 20019189 DOI: 10.2353/ajpath.2010.090249] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Iron overload is a risk factor for hepatocarcinoma, but the pathways involved are poorly characterized. Gene expression analysis in immortalized mouse hepatocytes exposed to iron or the iron chelator deferoxamine revealed that iron downregulated, whereas deferoxamine upregulated, mRNA levels of mouse double minute gene 2 (MDM2), the ubiquitin ligase involved in the degradation of the oncosuppressor p53. Regulation of MDM2 by iron status was observed at protein levels in mouse hepatocytes and rat liver, and was associated with specular changes in p53 expression. Iron dependent regulation of MDM2/p53 was confirmed ex-vivo in human monocytes, by manipulation of iron pool and in a genetic model of iron deficiency, leading to modulation of p53 target genes involved in the antioxidant response and apoptosis. Iron status influenced p53 ubiquitination and degradation rate, and the MDM2 inhibitor nutlin increased p53 levels in iron-depleted cells. Furthermore, nutlin enhanced the antiproliferative activity of deferoxamine in HepG2 hepatoblastoma cells. The MDM2 -309T > G promoter polymorphism, determining increased MDM2 and lower p53 activity, was associated with higher risk of hepatocarcinoma in cirrhotic patients with hemochromatosis, and with HFE mutations in patients with hepatocarcinoma without hemochromatosis, suggesting an interaction between MDM2 and iron in the pathogenesis of hepatocarcinoma. In conclusion, iron status influences p53 activity and antioxidant response by modulating MDM2 expression. MDM2 inhibitors may enhance the antiproliferative activity of iron chelators.
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Affiliation(s)
- Paola Dongiovanni
- Center of Metabolic and Liver Diseases, Department of Internal Medicine, University of Milano, Ospedale Policlinico Mangiagalli e Regina Elena Fondazione IRCCS, 20122 Milano, Italy
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Huang J, Bi Y, Zhu GH, He Y, Su Y, He BC, Wang Y, Kang Q, Chen L, Zuo GW, Luo Q, Shi Q, Zhang BQ, Huang A, Zhou L, Feng T, Luu HH, Haydon RC, He TC, Tang N. Retinoic acid signalling induces the differentiation of mouse fetal liver-derived hepatic progenitor cells. Liver Int 2009; 29:1569-81. [PMID: 19737349 DOI: 10.1111/j.1478-3231.2009.02111.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
BACKGROUND Hepatic progenitor cells (HPCs) can be isolated from fetal liver and extrahepatic tissues. Retinoic acid (RA) signalling plays an important role in development, although the role of RA signalling in liver-specific progenitors is poorly understood. AIMS We sought to determine the role of RA in regulating hepatic differentiation. METHODS RNA was isolated from liver tissues of various developmental stages. Liver marker expression was assessed by reverse transcriptase-polymerase chain reaction and immunofluorescence staining. Reversibly immortalized HPCs derived from mouse embryonic day 14.5 (E14.5) liver (aka, HP14.5) were established. Albumin promoter-driven reporter (Alb-GLuc) was used to monitor hepatic differentiation. Glycogen synthesis was assayed as a marker for terminal hepatic differentiation. RESULTS Retinoic acid receptor (RAR)-alpha, retinoid X receptor (RXR)-alpha and RXR-gamma expressed in E12.5 to postnatal day 28 liver samples. Expression of RAR-beta and RXR-beta was low perinatally, whereas RAR-gamma was undetectable in prenatal tissues and increased postnatally. Retinal dehydrogenase 1 and 2 (Raldh1 and Raldh2) were expressed in all tissues, while Raldh3 was weakly expressed in prenatal samples but was readily detected postnatally. Nuclear receptor corepressors were highly expressed in all tissues, while expression of nuclear co-activators decreased in perinatal tissues and increased after birth. HP14.5 cells expressed high levels of early liver stem cell markers. Expression of RA signalling components and coregulators was readily detected in HP14.5. RA was shown to induce Alb-GLuc activity and late hepatocyte markers. RA was further shown to induce glycogen synthesis in HP14.5 cells, an important function of mature hepatocytes. CONCLUSIONS Our results strongly suggest that RA signalling may play an important role in regulating hepatic differentiation.
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Affiliation(s)
- Jiayi Huang
- Key Laboratory of Diagnostic Medicine designated by the Ministry of Education of China, The Affiliated Hospitals of Chongqing Medical University, Chongqing, China
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Diagnosis and multi-disciplinary management of hepatic metastases from gastrointestinal stromal tumour (GIST). Eur J Surg Oncol 2009; 35:787-92. [PMID: 19185444 DOI: 10.1016/j.ejso.2009.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 12/25/2008] [Accepted: 01/06/2009] [Indexed: 12/13/2022] Open
Abstract
AIM To explore the present application of diagnosis and management of hepatic metastases from GIST. METHODS We performed a systematic review of the literature for studies concerning hepatic metastases from GIST. A literature search was performed using the Medline/PubMed databases to identify publications relevant to the review published from January 1998 to December 2008. Totally 113 relevant articles were retrieved. Abstracts from recent ASCO symposia were hand searched for relevant articles. After the primary filtration, articles on review and with repetitive content were excluded. The articles on clinical research, which were issued in authorized journals, were selected. At last, totally 69 articles were included for review. FINDINGS The rate of liver metastases was reported as 15.9% in primary GISTs. The recurrence rate following surgical resection for hepatic metastases from GIST had been reported as 70-77%. For metastatic GIST patients with tyrosine kinase inhibitor (TKI) treatment, it demonstrated rates of CR, PR and SD respectively of 5.84%, 50.7%, and 32.4%. Combining repeated surgery with TKI treatment, R0/R1 resection rates range in various series between 48 and 82%. For those patients with unresectable disease confined to the liver or unable to tolerate liver resection due to co-morbidity or advanced age, RFA, HACE, TKI therapy, or even liver transplantation, can also improve survival. CONCLUSIONS The liver is a common metastatic site for gastrointestinal stromal tumour (GIST). Appropriate initial evaluation remains paramount for selecting the correct management strategy. Multi-disciplinary management (which includes pathology, medical oncology, surgical oncology, and imaging expertise) of this disease is important for both curative and palliative treatment in these patients. Combining repeated surgery with TKI treatment may be the most effective management for GIST patients with liver metastases.
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