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Ehnes DD, Alghadeer A, Hanson-Drury S, Zhao YT, Tilmes G, Mathieu J, Ruohola-Baker H. Sci-Seq of Human Fetal Salivary Tissue Introduces Human Transcriptional Paradigms and a Novel Cell Population. FRONTIERS IN DENTAL MEDICINE 2022; 3:887057. [PMID: 36540608 PMCID: PMC9762771 DOI: 10.3389/fdmed.2022.887057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023] Open
Abstract
Multiple pathologies and non-pathological factors can disrupt the function of the non-regenerative human salivary gland including cancer and cancer therapeutics, autoimmune diseases, infections, pharmaceutical side effects, and traumatic injury. Despite the wide range of pathologies, no therapeutic or regenerative approaches exist to address salivary gland loss, likely due to significant gaps in our understanding of salivary gland development. Moreover, identifying the tissue of origin when diagnosing salivary carcinomas requires an understanding of human fetal development. Using computational tools, we identify developmental branchpoints, a novel stem cell-like population, and key signaling pathways in the human developing salivary glands by analyzing our human fetal single-cell sequencing data. Trajectory and transcriptional analysis suggest that the earliest progenitors yield excretory duct and myoepithelial cells and a transitional population that will yield later ductal cell types. Importantly, this single-cell analysis revealed a previously undescribed population of stem cell-like cells that are derived from SD and expresses high levels of genes associated with stem cell-like function. We have observed these rare cells, not in a single niche location but dispersed within the developing duct at later developmental stages. Our studies introduce new human-specific developmental paradigms for the salivary gland and lay the groundwork for the development of translational human therapeutics.
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Affiliation(s)
- Devon Duron Ehnes
- Department of Biochemistry, School of Medicine, University of Washington, Seattle, WA, United States
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
| | - Ammar Alghadeer
- Department of Biochemistry, School of Medicine, University of Washington, Seattle, WA, United States
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Sesha Hanson-Drury
- Department of Biochemistry, School of Medicine, University of Washington, Seattle, WA, United States
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, United States
| | - Yan Ting Zhao
- Department of Biochemistry, School of Medicine, University of Washington, Seattle, WA, United States
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, United States
| | - Gwen Tilmes
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
| | - Julie Mathieu
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
- Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Hannele Ruohola-Baker
- Department of Biochemistry, School of Medicine, University of Washington, Seattle, WA, United States
- Institute for Stem Cells and Regenerative Medicine, School of Medicine, University of Washington, Seattle, WA, United States
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
- Department of Bioengineering, University of Washington, Seattle, WA, United States
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2
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Puvabanditsin S, Chen CW, Botwinick M, Hussein K, Mariduena J, Mehta R. Ventriculomegaly and cerebellar hypoplasia in a neonate with interstitial 11q 24 deletion in Jacobsen syndrome region. Clin Case Rep 2018; 6:1268-1275. [PMID: 29988670 PMCID: PMC6028426 DOI: 10.1002/ccr3.1560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/12/2018] [Accepted: 04/03/2018] [Indexed: 11/10/2022] Open
Abstract
Jacobsen syndrome (JS) is a rare contiguous gene disorder caused by partial deletion of the distal part of the long arm of chromosome 11 ranging in size from 7 to 20 Mb. We report a term male neonate with an interstitial deletion of about 12.3 megabase (Mb) of chromosome 11q24.1qter. Our case is the first reported newborn patient with 11q24 deletion.
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Affiliation(s)
- Surasak Puvabanditsin
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
| | - Charlotte Wang Chen
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
| | - Marissa Botwinick
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
| | - Karen Hussein
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
| | - Joseph Mariduena
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
| | - Rajeev Mehta
- Department of PediatricsRutgers Robert Wood Johnson Medical SchoolNew BrunswickNew Jersey
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3
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Mi Y, Zhao S, Zhou C, Weng J, Li J, Wang Z, Sun H, Tang H, Zhang X, Sun X, Peng Z, Wen Y. Downregulation of homeobox gene Barx2 increases gastric cancer proliferation and metastasis and predicts poor patient outcomes. Oncotarget 2018; 7:60593-60608. [PMID: 27533254 PMCID: PMC5312404 DOI: 10.18632/oncotarget.11260] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 07/19/2016] [Indexed: 01/09/2023] Open
Abstract
Barx2 is a Bar family homeodomain transcription factor shown to play a critical role in cell adhesion and cytoskeleton remodeling, key processes in carcinogenesis and metastasis. Using quantitative real-time PCR, Western blotting, and immunohistochemistry, we found that Barx2 is expressed at lower levels in human gastric cancer (GC) tissues than in adjacent normal mucosa. In a multivariate analysis, Barx2 expression emerged as an independent prognostic factor for disease-free and overall survival. Kaplan-Meier survival analysis showed a trend toward even shorter overall survival in the patient group with Barx2-negative tumors, independent of advanced UICC stage and tumor relapse. Using in vitro and in vivo assays, we demonstrated that under normal conditions Barx2 inhibited GC cell proliferation and invasiveness through inhibition of the Wnt/β-catenin signaling pathway. These findings indicate that reduction or loss of Barx2 dis-inhibits GC cell proliferation and invasion, and that reduction in Barx2 could serve as an independent prognostic biomarker for poor outcome in GC patients.
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Affiliation(s)
- Yushuai Mi
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Senlin Zhao
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China.,Department of Oncology and Department of Clinical and Experimental Medicine, Linkoping University, SE-581 85 Linkoping, Sweden
| | - Chongzhi Zhou
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Junyong Weng
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Jikun Li
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Zhanshan Wang
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Huimin Sun
- Department of Pathology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Huamei Tang
- Department of Pathology, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Xin Zhang
- Department of Pathology, Zhejiang Provincial People's Hospital, 310014 Hangzhou Zhejiang, China
| | - Xiaofeng Sun
- Department of Oncology and Department of Clinical and Experimental Medicine, Linkoping University, SE-581 85 Linkoping, Sweden
| | - Zhihai Peng
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China
| | - Yugang Wen
- Department of General Surgery, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, 200080 Shanghai, China.,Department of Oncology and Department of Clinical and Experimental Medicine, Linkoping University, SE-581 85 Linkoping, Sweden
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4
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Wang G, Liu J, Cai Y, Chen J, Xie W, Kong X, Huang W, Guo H, Zhao X, Lu Y, Niu L, Li X, Zhang H, Lei C, Lei Z, Yin J, Hu H, Yu F, Nie Y, Xia L, Wu K. Loss of Barx1 promotes hepatocellular carcinoma metastasis through up-regulating MGAT5 and MMP9 expression and indicates poor prognosis. Oncotarget 2017; 8:71867-71880. [PMID: 29069753 PMCID: PMC5641096 DOI: 10.18632/oncotarget.18288] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/07/2017] [Indexed: 12/14/2022] Open
Abstract
Metastasis is the major dominant reason for poor prognosis of hepatocellular carcinoma (HCC) after surgical treatment. However, the molecular mechanism of metastasis has not been well characterzied. Here, we report a novel function of Barx homeobox1 (Barx1) in inhibiting HCC invasion and metastasis. Barx1 expression is significantly decreased in human HCC tissues than in adjacent non-tumorous tissues and normal liver tissues. Low Barx1 expression is correlated with higher tumor-nodule-metastasis stage and indicates poor prognosis. Down-regulation of Barx1 promotes HCC migration, invasion and metastasis, whereas up-regulation of Barx1 inhibits HCC migration, invasion and metastasis. Mannosyl (alpha-1,6-)-glycoprotein beta-1,6-N-acetyl-glucosaminyltransferase 5 (MGAT5) and matrix metallopeptidase 9 (MMP9) are direct target genes of Barx1. Knockdown of Barx1 up-regulates MGAT5 and MMP9 expression in HCC cells with low metastatic capability, whereas over-expression of Barx1 suppresses their expression in HCC cells with high metastatic capability. Knockdown of both MGAT5 and MMP9 significantly decreases the invasion and metastasis abilities induced by Barx1 knockdown. Barx1 expression is negatively correlated with MGAT5 and MMP9 expression in human HCC tissues. Patients with low expression of Barx1 and high expression of MGAT5 or MMP9 are associated with poorer prognosis. Thus, loss of Barx1 represents a prognostic biomarker in human HCC patients.
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Affiliation(s)
- Guodong Wang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Jian Liu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Yi Cai
- Department of Oncology and The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jie Chen
- Department of Orthopedic Oncology, Tangdu Hospital of Fourth Military Medical University, Xi'an 710038, Shaanxi Province, People's Republic of China
| | - Wenbing Xie
- Department of Oncology and The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Xiangqian Kong
- Department of Oncology and The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Wenjie Huang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China.,Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Hao Guo
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Xiaodi Zhao
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Yuanyuan Lu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Lu Niu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Xiaowei Li
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Haijia Zhang
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Chao Lei
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Zhijie Lei
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Jipeng Yin
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Hao Hu
- Department of Gastroenterology, the Fifth Hospital of the People's Liberation Army, Yinchuan 750000, Ningxia Province, People's Republic of China
| | - Fan Yu
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an 710032, People's Republic of China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Limin Xia
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China.,Department of Gastroenterology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, People's Republic of China
| | - Kaichun Wu
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, People's Republic of China
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5
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Mi Y, Zhao S, Zhang W, Zhang D, Weng J, Huang K, Sun H, Tang H, Zhang X, Sun X, Peng Z, Wen Y. Down-regulation of Barx2 predicts poor survival in colorectal cancer. Biochem Biophys Res Commun 2016; 478:67-73. [DOI: 10.1016/j.bbrc.2016.07.091] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 07/20/2016] [Indexed: 01/20/2023]
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6
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Carpinelli MR, Kruse EA, Arhatari BD, Debrincat MA, Ogier JM, Bories JC, Kile BT, Burt RA. Mice Haploinsufficient for Ets1 and Fli1 Display Middle Ear Abnormalities and Model Aspects of Jacobsen Syndrome. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 185:1867-76. [PMID: 26093983 DOI: 10.1016/j.ajpath.2015.03.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 02/01/2015] [Accepted: 03/02/2015] [Indexed: 12/23/2022]
Abstract
E26 transformation-specific 1 (ETS1) and friend leukemia integration 1 (FLI1) are members of the ETS family of transcription factors, of which there are 28 in humans. Both genes are hemizygous in Jacobsen syndrome, an 11q contiguous gene deletion disorder involving thrombocytopenia, facial dysmorphism, growth and mental retardation, malformation of the heart and other organs, and hearing impairment associated with recurrent ear infections. To determine whether any of these defects are because of hemizygosity for ETS1 and FLI1, we characterized the phenotype of mice heterozygous for mutant alleles of Ets1 and Fli1. Fli1(+/-) mice displayed mild thrombocytopenia, as did Ets1(+/-)Fli1(+/-) animals. Fli1(+/-) and Ets1(+/-)Fli1(+/-) mice also displayed craniofacial abnormalities, including a small middle ear cavity, short nasal bone, and malformed interface between the nasal bone process and cartilaginous nasal septum. They exhibited hearing impairment, otitis media, fusions of ossicles to the middle ear wall, and deformed stapes. Hearing impairment was more penetrant and stapes malformations were more severe in Ets1(+/-)Fli1(+/-) mice than in Fli1(+/-) mice, indicating partial functional redundancy of these transcription factors during auditory development. Our findings indicate that the short nose, otitis media, and hearing impairment in Jacobsen syndrome are likely because of hemizygosity for ETS1 and FLI1.
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Affiliation(s)
- Marina R Carpinelli
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia; HEARing Cooperative Research Centre, University of Melbourne, Melbourne, Victoria, Australia
| | - Elizabeth A Kruse
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Benedicta D Arhatari
- Department of Physics, ARC Centre of Excellence for Coherent X-Ray Science, La Trobe University, Bundoora, Victoria, Australia
| | - Marlyse A Debrincat
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Jacqueline M Ogier
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia; HEARing Cooperative Research Centre, University of Melbourne, Melbourne, Victoria, Australia
| | | | - Benjamin T Kile
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Medical Biology, University of Melbourne, Melbourne, Victoria, Australia
| | - Rachel A Burt
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia; HEARing Cooperative Research Centre, University of Melbourne, Melbourne, Victoria, Australia; Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia; Department of Genetics, University of Melbourne, Melbourne, Victoria, Australia.
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7
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Zhang Y, Zhang JX, Huang LL, He LJ, Liao YJ, Lai YR, Deng HX, Tian XP, Kung HF, Xie D, Zhu SL. Low expression of BARX2 in human primary hepatocellular carcinoma correlates with metastasis and predicts poor prognosis. Hepatol Res 2015; 45:228-37. [PMID: 24716715 DOI: 10.1111/hepr.12340] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 12/19/2022]
Abstract
AIM The homeobox gene Barx2 was recently identified as a regulator of ovarian and breast cancer; however, the expression level of BARX2 and its significance in hepatocellular carcinoma (HCC) remain unknown. METHODS Protein and mRNA expression levels of Barx2 were examined using Western blotting and real-time PCR respectively, in paired HCC tissue and matched adjacent non-cancerous tissue from 12 patients. The expression levels of epithelial-mesenchymal transition (EMT) markers were also detected in relation to BARX2 expression. Lastly, immunohistochemistry for BARX2 was also performed on a tissue microarray containing 231 HCC tissue samples. RESULTS We observed that BARX2 expression was lower in HCC tissues compared to matching adjacent non-cancerous tissue. The low expression level of BARX2 was significantly correlated with metrics of tumor size, tumor differentiation, clinical stage, metastasis and relapse. Furthermore, the patients with low BARX2 expression had adverse survival outcomes. Importantly, multivariate Cox regression analysis revealed that low BARX2 expression was an independent marker for lower overall survival (P = 0.007). Moreover, a significant negative relationship was observed between the expression of BARX2 and markers of EMT. CONCLUSION These findings provide evidence that the low expression level of BARX2 in HCC is significantly correlated with tumor metastasis, and that BARX2 may be an independent prognostic biomarker for patients with HCC.
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Affiliation(s)
- Yi Zhang
- Department of Gastroenterology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou
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8
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Makarenkova HP, Meech R. Barx homeobox family in muscle development and regeneration. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2012; 297:117-73. [PMID: 22608559 DOI: 10.1016/b978-0-12-394308-8.00004-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Homeobox transcription factors are key intrinsic regulators of myogenesis. In studies spanning several years, we have characterized the homeobox factor Barx2 as a novel marker for muscle progenitor cells and an important regulator of muscle growth and repair. In this review, we place the expression and function of Barx2 and its paralogue Barx1 in context with other muscle-expressed homeobox factors in both embryonic and adult myogenesis. We also describe the structure and regulation of Barx genes and possible gene/disease associations. The functional domains of Barx proteins, their molecular interactions, and cellular functions are presented with particular emphasis on control of genes and processes involved in myogenic differentiation. Finally, we describe the patterns of Barx gene expression in vivo and the phenotypes of various Barx gene perturbation models including null mice. We focus on the Barx2 null mouse model, which has demonstrated the critical roles of Barx2 in postnatal myogenesis including muscle maintenance during aging, and regeneration of acute and chronic muscle injury.
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Affiliation(s)
- Helen P Makarenkova
- The Neurobiology Department, Scripps Research Institute, La Jolla, California, USA
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9
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Diagnosis and fine mapping of a deletion in distal 11q in two Chinese patients with developmental delay. J Hum Genet 2010; 55:486-9. [DOI: 10.1038/jhg.2010.51] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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10
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Miller GL, Somani S, Nowaczyk MJM, Feigenbaum A, Davidson RG, Costa T, Levin AV. The Ocular Manifestations of Jacobsen Syndrome: A Report of Four Cases and a Review of the Literature. Ophthalmic Genet 2009; 27:1-7. [PMID: 16543195 DOI: 10.1080/13816810500481832] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE We report ophthalmic manifestations in four Jacobsen syndrome cases, review the literature, and suggest phenotype-genotype correlations. METHODS Chart review of Ocular Genetics Program patients at The Hospital for Sick Children, Toronto, Canada. RESULTS Four del11qter cases are presented. Hypertelorism/telecanthus, abnormally slanted palpebral fissures, abnormal retinal findings, nasolacrimal duct obstruction, anomalous extraocular muscles, amblyopia, and microcornea were found. CONCLUSIONS We report typical findings and novel ocular presentations. Visual prognosis is generally good. Retinal dysplasia and coloboma seem associated with del11q23. ABCG4, NCAM, and Mfrp are candidate genes in this region that theoretically may be disrupted.
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Affiliation(s)
- Garfield L Miller
- University of Toronto, 555 University Avenue, Toronto, Ontario M5G 1X8, Canada
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11
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Mattina T, Perrotta CS, Grossfeld P. Jacobsen syndrome. Orphanet J Rare Dis 2009; 4:9. [PMID: 19267933 PMCID: PMC2670819 DOI: 10.1186/1750-1172-4-9] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Accepted: 03/07/2009] [Indexed: 11/10/2022] Open
Abstract
Jacobsen syndrome is a MCA/MR contiguous gene syndrome caused by partial deletion of the long arm of chromosome 11. To date, over 200 cases have been reported. The prevalence has been estimated at 1/100,000 births, with a female/male ratio 2:1. The most common clinical features include pre- and postnatal physical growth retardation, psychomotor retardation, and characteristic facial dysmorphism (skull deformities, hypertelorism, ptosis, coloboma, downslanting palpebral fissures, epicanthal folds, broad nasal bridge, short nose, v-shaped mouth, small ears, low set posteriorly rotated ears). Abnormal platelet function, thrombocytopenia or pancytopenia are usually present at birth. Patients commonly have malformations of the heart, kidney, gastrointestinal tract, genitalia, central nervous system and skeleton. Ocular, hearing, immunological and hormonal problems may be also present. The deletion size ranges from approximately 7 to 20 Mb, with the proximal breakpoint within or telomeric to subband 11q23.3 and the deletion extending usually to the telomere. The deletion is de novo in 85% of reported cases, and in 15% of cases it results from an unbalanced segregation of a familial balanced translocation or from other chromosome rearrangements. In a minority of cases the breakpoint is at the FRA11B fragile site. Diagnosis is based on clinical findings (intellectual deficit, facial dysmorphic features and thrombocytopenia) and confirmed by cytogenetics analysis. Differential diagnoses include Turner and Noonan syndromes, and acquired thrombocytopenia due to sepsis. Prenatal diagnosis of 11q deletion is possible by amniocentesis or chorionic villus sampling and cytogenetic analysis. Management is multi-disciplinary and requires evaluation by general pediatrician, pediatric cardiologist, neurologist, ophthalmologist. Auditory tests, blood tests, endocrine and immunological assessment and follow-up should be offered to all patients. Cardiac malformations can be very severe and require heart surgery in the neonatal period. Newborns with Jacobsen syndrome may have difficulties in feeding and tube feeding may be necessary. Special attention should be devoted due to hematological problems. About 20% of children die during the first two years of life, most commonly related to complications from congenital heart disease, and less commonly from bleeding. For patients who survive the neonatal period and infancy, the life expectancy remains unknown.
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Affiliation(s)
- Teresa Mattina
- Genetica Medica, Department of Pediatrics, University of Catania, Catania, Italy.
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12
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Duverger O, Morasso MI. Role of homeobox genes in the patterning, specification, and differentiation of ectodermal appendages in mammals. J Cell Physiol 2008; 216:337-46. [PMID: 18459147 DOI: 10.1002/jcp.21491] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Homeobox genes are an evolutionarily conserved class of transcription factors that are key regulators during developmental processes such as regional specification, patterning, and differentiation. In this review, we summarize the expression pattern, loss- and/or gain-of-function mouse models, and naturally occurring mouse and human mutations of known homeobox genes required for the development of ectodermal appendages.
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Affiliation(s)
- Olivier Duverger
- Developmental Skin Biology Unit, National Institute of Arthritis Musculoskeletal and Skin Diseases, NIH, Bethesda, Maryland, USA
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13
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Stevens TA, Meech R. BARX2 and estrogen receptor-alpha (ESR1) coordinately regulate the production of alternatively spliced ESR1 isoforms and control breast cancer cell growth and invasion. Oncogene 2006; 25:5426-35. [PMID: 16636675 DOI: 10.1038/sj.onc.1209529] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The estrogen receptor-alpha gene (ESR1) was previously identified as a direct target of the homeobox transcription factor BARX2 in MCF7 cells. Here, we show that BARX2 and ESR1 proteins bind to different ESR1 gene promoters and regulate the expression of alternatively spliced mRNAs that encode 66 and 46 kDa ESR1 protein isoforms. BARX2 increases the expression of both ESR1 isoforms; however, it has a greater effect on the 46 kDa isoform, leading to an increased ratio between the 46 and 66 kDa proteins. BARX2 also influences estrogen-dependent processes such as anchorage-independent growth and modulates the expression of the estrogen-responsive genes SOX5, RBM15, Dynein and Mortalin. In addition, BARX2 expression promotes cellular invasion and increases the expression of active matrix metalloproteinase-9 (MMP9). BARX2 also increases the expression of the tissue inhibitor of metalloproteinase (TIMP) genes, TIMP1 and TIMP3, in cooperation with estrogen signaling. Overall, these data indicate that BARX2 and ESR1 may coordinately regulate cell growth, survival and invasion pathways that are critical to breast cancer progression.
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Affiliation(s)
- T A Stevens
- Department of Neurobiology, The Scripps Research Institute, La Jolla, CA 92037, USA
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14
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Böhm D, Hoffmann K, Laccone F, Wilken B, Dechent P, Frahm J, Bartels I, Bohlander SK. Association of Jacobsen syndrome and bipolar affective disorder in a patient with a de novo 11q terminal deletion. Am J Med Genet A 2006; 140:378-82. [PMID: 16419136 DOI: 10.1002/ajmg.a.31088] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We report on a young woman with Jacobsen syndrome (JBS) who was admitted to our psychiatric department because of a bipolar affective disorder (BPAD). Chromosome analysis was performed due to the fact that she had mental retardation, short stature, and subtle facial anomalies. A deletion of the distal long arm of chromosome 11 was found. A detailed mapping of the deletion breakpoint by quantitative real time PCR revealed a true terminal 11q deletion of approximately 8 Mb corresponding to the karyotype 46,XX,del(11)(q24.2). Polymorphic DNA marker analysis showed that the deletion is located on the paternal chromosome. Additionally, laboratory investigations revealed a low platelet count and magnetic resonance imaging of the brain showed white matter T2 hyperintensities in frontotemporal regions, which are unlikely to result from a demyelinating process as indicated by localized proton magnetic resonance spectroscopy. To our knowledge, this is the first report describing a BPAD in a case with JBS.
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Affiliation(s)
- D Böhm
- Institute of Human Genetics, Göttingen, Germany
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15
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Olson LE, Zhang J, Taylor H, Rose DW, Rosenfeld MG. Barx2 functions through distinct corepressor classes to regulate hair follicle remodeling. Proc Natl Acad Sci U S A 2005; 102:3708-13. [PMID: 15728386 PMCID: PMC553323 DOI: 10.1073/pnas.0500519102] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The hair-growth cycle, a complex biological system requiring coordinate alterations in gene expression and cellular behavior, provides a challenging model for investigating the interplay of specific transcriptional regulation events. Here we report that the Barx2 homeodomain factor serves as a regulator of hair follicle remodeling (catagen), and loss of Barx2 in mice causes a defect both in the initiation and progression of catagen, resulting in a protracted first catagen, and later, causing short hair in adult gene-deleted mice. Barx2 negatively regulates its own promoter, and our study highlights the role of Barx2 as a repressor in the skin that can, unexpectedly, functionally interact with two WD40-domain factors distantly related to the yeast corepressor Tup1. These two corepressors, transducin-like enhancer of split and transducin beta-like 1, function through distinct and independent interactions with Barx2 for the repression of gene targets, including the Barx2 gene itself, emphasizing the roles of complementary repression strategies in engrailed homology-1 motif-containing homeodomain factors. Together, our data suggest that the hair-remodeling defect of Barx2 mutant mice could be explained, in part, by failure to repress one or more critical target genes.
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Affiliation(s)
- Lorin E Olson
- Howard Hughes Medical Institute, Biomedical Sciences Graduate Program, University of California at San Diego School of Medicine, La Jolla, CA 92093-0648, USA
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16
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Stevens TA, Iacovoni JS, Edelman DB, Meech R. Identification of novel binding elements and gene targets for the homeodomain protein BARX2. J Biol Chem 2004; 279:14520-30. [PMID: 14744868 DOI: 10.1074/jbc.m310259200] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BARX2 is a homeobox transcription factor that influences cellular differentiation in various developmental contexts. To begin to identify the gene targets that mediate its effects, chromatin immunoprecipitation (ChIP) was used to isolate BARX2 binding sites from the human MCF7 breast cancer cell line. Cloning and sequencing of BARX2-ChIP-derived DNA fragments identified 60 potential BARX2 target loci that were proximal to or within introns of genes involved in cytoskeletal organization, cell adhesion, growth factor signaling, transcriptional regulation, and RNA metabolism. The sequences of over half of the fragments showed homology with the mouse genome, and several sequences could be mapped to orthologous human and mouse genes. Binding of BARX2 to 21 genomic loci examined was confirmed quantitatively by replicate ChIP assays. A combination of sequence analysis and electrophoretic mobility shift assays revealed homeodomain binding sites within several fragments that bind to BARX2 in vitro. The majority of BARX2 binding fragments tested (14/19), also affected transcription in luciferase reporter gene assays. Mutation analyses of three fragments showed that their transcriptional activities required the HBS, and suggested that BARX2 regulates gene expression by binding to DNA elements containing paired TAAT motifs that are separated by a poly(T) sequence. Inhibition of BARX2 expression in MCF7 cells led to reduced expression of eight genes associated with BARX2 binding sites, indicating that BARX2 directly regulates their expression. The data suggest that BARX2 can coordinate the expression of a network of genes that influence the growth of MCF7 cells.
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Affiliation(s)
- Tracy A Stevens
- Department of Neurobiology, The Scripps Research Institute, La Jolla, California 92037, USA
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17
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Chen H, Sukumar S. Role of homeobox genes in normal mammary gland development and breast tumorigenesis. J Mammary Gland Biol Neoplasia 2003; 8:159-75. [PMID: 14635792 DOI: 10.1023/a:1025996707117] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The role of homeobox-containing genes in embryogenesis and organogenesis is well documented. Also, a sizeable body of evidence has accumulated and supports the fact that homeobox genes, when dysregulated, are involved in tumorigenesis. However, the precise mechanisms of homeobox gene functions are largely unknown. The mammary gland, in which most maturation occurs postnatally, provides an ideal model for studying the functions of homeobox genes in both development and tumorigenesis. The expression of many homeobox genes has been detected in both normal mammary gland and neoplastic breast tissues. In the normal mammary gland, the expression of homeobox genes is coordinately regulated by hormone and extracellular matrix (ECM) and other unknown factors in a spatial and temporal manner in both stromal and epithelial cells. Animals with misexpressed homeobox genes displayed different extents of defects in ductal proliferation, side branching, and alveoli formation, implying that homeobox genes are important for normal mammary gland development. Recent studies of homeobox genes in breast cancer cells and primary tumors indicate that they may also play a contributory or causal role in tumorigenesis by regulating the cell cycle, apoptosis, angiogenesis, and/or metastasis.
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Affiliation(s)
- Hexin Chen
- Breast Cancer Program, the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland, USA
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18
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Meech R, Makarenkova H, Edelman DB, Jones FS. The homeodomain protein Barx2 promotes myogenic differentiation and is regulated by myogenic regulatory factors. J Biol Chem 2003; 278:8269-78. [PMID: 12486129 DOI: 10.1074/jbc.m207617200] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The homeobox protein Barx2 is expressed in both smooth and skeletal muscle and is up-regulated during differentiation of skeletal myotubes. Here we use antisense-oligonucleotide inhibition of Barx2 expression in limb bud cell culture to show that Barx2 is required for myotube formation. Moreover, overexpression of Barx2 accelerates the fusion of MyoD-positive limb bud cells and C2C12 myoblasts. However, overexpression of Barx2 does not induce ectopic MyoD expression in either limb bud cultures or in multipotent C3H10T1/2 mesenchymal cells, and does not induce fusion of C3H10T1/2 cells. These results suggest that Barx2 acts downstream of MyoD. To test this hypothesis, we isolated the Barx2 gene promoter and identified DNA regulatory elements that might control Barx2 expression during myogenesis. The proximal promoter of the Barx2 gene contained binding sites for several factors involved in myoblast differentiation including MyoD, myogenin, serum response factor, and myocyte enhancer factor 2. Co-transfection experiments showed that binding sites for both MyoD and serum response factor are necessary for activation of the promoter by MyoD and myogenin. Taken together, these studies indicate that Barx2 is a key regulator of myogenic differentiation that acts downstream of muscle regulatory factors.
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Affiliation(s)
- Robyn Meech
- Department of Neurobiology, The Scripps Research Institute, La Jolla, California 92037, USA.
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19
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Herring BP, Kriegel AM, Hoggatt AM. Identification of Barx2b, a serum response factor-associated homeodomain protein. J Biol Chem 2001; 276:14482-9. [PMID: 11278942 DOI: 10.1074/jbc.m011585200] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
CC(A/T)(6)GG or serum response elements represent a common regulatory motif important for regulating the expression of many smooth muscle-specific genes. They are multifunctional elements that bind serum response factor (SRF) and are important for serum induction of genes, expression of muscle-specific genes, and differentiation of vascular smooth muscle cells. In the current study, a yeast two-hybrid screen was used to identify proteins from mouse intestine that interact with SRF. A novel homeodomain-containing transcription factor, called Barx2b, was identified that specifically interacts with SRF and promotes the DNA binding activity of SRF. Northern blotting, RNase protection analysis, and Western blotting revealed that Barx2b mRNA and protein are expressed in several smooth muscle-containing tissues, as well as in skeletal muscle and brain. In vitro binding studies using bacterial fusion proteins revealed that the DNA-binding domain of SRF interacts with a region of Barx2b located amino-terminal of the homeobox domain. The results of these studies support the hypothesis that interaction of SRF with different homeodomain-containing proteins may play a critical role in determining the cell-specific functions of SRF.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Blotting, Northern
- Blotting, Western
- Brain/metabolism
- Cell Differentiation
- Cell Line
- DNA/metabolism
- DNA, Complementary/metabolism
- DNA-Binding Proteins/metabolism
- Electrophoresis, Polyacrylamide Gel
- Gene Library
- Genes, Reporter
- Homeodomain Proteins/biosynthesis
- Homeodomain Proteins/chemistry
- Homeodomain Proteins/metabolism
- Intestinal Mucosa/metabolism
- Mice
- Models, Genetic
- Molecular Sequence Data
- Muscle, Skeletal/metabolism
- Muscle, Smooth/metabolism
- Nuclear Proteins/metabolism
- Protein Binding
- RNA, Messenger/metabolism
- Recombinant Fusion Proteins/metabolism
- Recombinant Proteins/metabolism
- Ribonucleases/metabolism
- Sequence Homology, Amino Acid
- Serum Response Factor
- Time Factors
- Tissue Distribution
- Two-Hybrid System Techniques
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Affiliation(s)
- B P Herring
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis 46202-5120, USA.
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