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Pignatti E, Altinkilic EM, Bräutigam K, Grössl M, Perren A, Zavolan M, Flück CE. Cholesterol Deprivation Drives DHEA Biosynthesis in Human Adrenals. Endocrinology 2022; 163:6588149. [PMID: 35583599 DOI: 10.1210/endocr/bqac076] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 11/19/2022]
Abstract
Adrenarche is an early event in sexual maturation in prepubertal children and corresponds to the postnatal development of the adrenocortical zona reticularis (zR). However, the molecular mechanisms that govern the onset and maturation of zR remain unknown. Using tissue laser microdissection combined with transcript quantification and immunodetection, we showed that the human zR receives low levels of cholesterol in comparison with other adrenal layers. To model this metabolic condition, we challenged adrenal cells in vitro using cholesterol deprivation. This resulted in reprogramming the steroidogenic pathway toward inactivation of 3-beta-hydroxysteroid dehydrogenase type 2 (HSD3B2), increased CYB5A expression, and increased biosynthesis of dehydroepiandrosterone (DHEA), 3 key features of zR maturation during adrenarche. Finally, we found that cholesterol deprivation leads to decreased transcriptional activity of POU3F2, which normally stimulates the expression of HSD3B2 by directly binding to its promoter. These findings demonstrate that cholesterol deprivation can account, at least in part, for the acquisition of a zR-like androgenic program in humans.
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Affiliation(s)
- Emanuele Pignatti
- Division of Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, University Hospital Inselspital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University Hospital Inselspital, University of Bern, 3010 Bern, Switzerland
| | - Emre Murat Altinkilic
- Division of Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, University Hospital Inselspital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University Hospital Inselspital, University of Bern , 3010 Bern, Switzerland
| | | | - Michael Grössl
- Department for BioMedical Research, University Hospital Inselspital, University of Bern , 3010 Bern, Switzerland
- Department of Nephrology and Hypertension, Inselspital, Bern University Hospital, 3010, Bern, Switzerland
| | - Aurel Perren
- Institute of Pathology, University of Bern , 3008 Bern, Switzerland
| | | | - Christa E Flück
- Division of Pediatric Endocrinology, Diabetology and Metabolism, Department of Pediatrics, University Hospital Inselspital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University Hospital Inselspital, University of Bern, 3010 Bern, Switzerland
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2
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Huang F, Santinon F, Flores González RE, del Rincón SV. Melanoma Plasticity: Promoter of Metastasis and Resistance to Therapy. Front Oncol 2021; 11:756001. [PMID: 34604096 PMCID: PMC8481945 DOI: 10.3389/fonc.2021.756001] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 08/30/2021] [Indexed: 12/14/2022] Open
Abstract
Melanoma is the deadliest form of skin cancer. Although targeted therapies and immunotherapies have revolutionized the treatment of metastatic melanoma, most patients are not cured. Therapy resistance remains a significant clinical challenge. Melanoma comprises phenotypically distinct subpopulations of cells, exhibiting distinct gene signatures leading to tumor heterogeneity and favoring therapeutic resistance. Cellular plasticity in melanoma is referred to as phenotype switching. Regardless of their genomic classification, melanomas switch from a proliferative and differentiated phenotype to an invasive, dedifferentiated and often therapy-resistant state. In this review we discuss potential mechanisms underpinning melanoma phenotype switching, how this cellular plasticity contributes to resistance to both targeted therapies and immunotherapies. Finally, we highlight novel strategies to target plasticity and their potential clinical impact in melanoma.
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Affiliation(s)
- Fan Huang
- Lady Davis Institute, McGill University, Montréal, QC, Canada
- Department of Experimental Medicine, McGill University, Montréal, QC, Canada
| | - François Santinon
- Lady Davis Institute, McGill University, Montréal, QC, Canada
- Department of Experimental Medicine, McGill University, Montréal, QC, Canada
| | - Raúl Ernesto Flores González
- Lady Davis Institute, McGill University, Montréal, QC, Canada
- Department of Experimental Medicine, McGill University, Montréal, QC, Canada
| | - Sonia V. del Rincón
- Lady Davis Institute, McGill University, Montréal, QC, Canada
- Department of Experimental Medicine, McGill University, Montréal, QC, Canada
- Department of Oncology, McGill University, Montréal, QC, Canada
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3
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Hamm M, Sohier P, Petit V, Raymond JH, Delmas V, Le Coz M, Gesbert F, Kenny C, Aktary Z, Pouteaux M, Rambow F, Sarasin A, Charoenchon N, Bellacosa A, Sanchez-Del-Campo L, Mosteo L, Lauss M, Meijer D, Steingrimsson E, Jönsson GB, Cornell RA, Davidson I, Goding CR, Larue L. BRN2 is a non-canonical melanoma tumor-suppressor. Nat Commun 2021; 12:3707. [PMID: 34140478 PMCID: PMC8211827 DOI: 10.1038/s41467-021-23973-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 05/27/2021] [Indexed: 12/13/2022] Open
Abstract
While the major drivers of melanoma initiation, including activation of NRAS/BRAF and loss of PTEN or CDKN2A, have been identified, the role of key transcription factors that impose altered transcriptional states in response to deregulated signaling is not well understood. The POU domain transcription factor BRN2 is a key regulator of melanoma invasion, yet its role in melanoma initiation remains unknown. Here, in a BrafV600E PtenF/+ context, we show that BRN2 haplo-insufficiency promotes melanoma initiation and metastasis. However, metastatic colonization is less efficient in the absence of Brn2. Mechanistically, BRN2 directly induces PTEN expression and in consequence represses PI3K signaling. Moreover, MITF, a BRN2 target, represses PTEN transcription. Collectively, our results suggest that on a PTEN heterozygous background somatic deletion of one BRN2 allele and temporal regulation of the other allele elicits melanoma initiation and progression.
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Affiliation(s)
- Michael Hamm
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Pierre Sohier
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Valérie Petit
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Jérémy H Raymond
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Véronique Delmas
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Madeleine Le Coz
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Franck Gesbert
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Colin Kenny
- Department of Anatomy and Cell biology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Zackie Aktary
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Marie Pouteaux
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Florian Rambow
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
| | - Alain Sarasin
- Laboratory of Genetic Instability and Oncogenesis, UMR8200 CNRS, Gustave Roussy, Université Paris-Sud, Villejuif, France
| | - Nisamanee Charoenchon
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France
- Equipes Labellisées Ligue Contre le Cancer, Paris, France
- Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Alfonso Bellacosa
- Cancer Epigenetics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Luis Sanchez-Del-Campo
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, UK
| | - Laura Mosteo
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, UK
| | - Martin Lauss
- Department of Oncology, Clinical Sciences Lund, Lund University and Skåne University Hospital, Lund, Sweden
| | - Dies Meijer
- Centre of Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Eirikur Steingrimsson
- Department of Biochemistry and Molecular Biology, and Department of Anatomy, BioMedical Center, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Göran B Jönsson
- Department of Oncology, Clinical Sciences Lund, Lund University and Skåne University Hospital, Lund, Sweden
| | - Robert A Cornell
- Department of Anatomy and Cell biology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Irwin Davidson
- Department of Anatomy and Cell biology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/UNISTRA, 1 Rue Laurent Fries, 67404, Illkirch, Cedex, France
| | - Colin R Goding
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford, UK.
| | - Lionel Larue
- Institut Curie, Université PSL, CNRS UMR3347, Inserm U1021, Normal and Pathological Development of Melanocytes, Orsay, France.
- Université Paris-Saclay, CNRS UMR3347, Inserm U1021, Signalisation radiobiologie et cancer, Orsay, France.
- Equipes Labellisées Ligue Contre le Cancer, Paris, France.
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4
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Zhao G, Wei Z, Guo Y. MicroRNA-107 is a novel tumor suppressor targeting POU3F2 in melanoma. Biol Res 2020; 53:11. [PMID: 32169117 PMCID: PMC7071777 DOI: 10.1186/s40659-020-00278-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 03/06/2020] [Indexed: 12/20/2022] Open
Abstract
Background Melanoma is one of the major types of skin cancer. The metastatic melanoma is among the most lethal forms of malignant skin tumors. We hereby aimed to characterize a novel microRNA (miR) in the metastatic melanoma model. Methods First, we evaluated the expression of miR-107 in melanoma cells and tumor tissues. The comparison between primary and metastatic cancer tissues was also accessed. Next, we examined the impact of miR-107 on melanoma cell proliferation, cell cycle, colony formation, apoptotic activity, migration and matrix invasion. A downstream target of miR-107 was also predicted and validated functionally in melanoma cells. Results Our findings showed miR-107 was significantly downregulated in melanoma. Its expression was lowest in metastatic form. Over-expression of miR-107 reduced melanoma cell proliferation, migration and invasion. POU3F2 was identified as the downstream target of miR-107. Over-expression of POU3F2 antagonized miR-107-mediated inhibitory effect on melanoma cells. Conclusion Our study has reported miR-107 as a novel tumor suppressive factor in the metastatic melanoma model. It has provided new avenue to manage melanoma and improve the survival rate in the advanced stage.
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Affiliation(s)
- Guizhi Zhao
- Department of Dermatology, Daqing Oilfield General Hospital, No. 9 Zhongkang Road, Saertu District, Daqing, 163000, Heilongjiang, China
| | - Zhili Wei
- Department of Stomatology, Daqing Oilfield General Hospital, No. 9 Zhongkang Road, Saertu District, Daqing, 163000, Heilongjiang, China
| | - Yang Guo
- Department of Dermatology, Dongzhimen Hospital, Beijing University of Traditional Chinese Medicine, No. 5 Shipping Warehouse, Dongcheng District, Beijing, 100700, China.
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5
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Fane ME, Chhabra Y, Smith AG, Sturm RA. BRN2, a POUerful driver of melanoma phenotype switching and metastasis. Pigment Cell Melanoma Res 2018; 32:9-24. [PMID: 29781575 DOI: 10.1111/pcmr.12710] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 04/18/2018] [Accepted: 04/25/2018] [Indexed: 12/30/2022]
Abstract
The POU domain family of transcription factors play a central role in embryogenesis and are highly expressed in neural crest cells and the developing brain. BRN2 is a class III POU domain protein that is a key mediator of neuroendocrine and melanocytic development and differentiation. While BRN2 is a central regulator in numerous developmental programs, it has also emerged as a major player in the biology of tumourigenesis. In melanoma, BRN2 has been implicated as one of the master regulators of the acquisition of invasive behaviour within the phenotype switching model of progression. As a mediator of melanoma cell phenotype switching, it coordinates the transition to a dedifferentiated, slow cycling and highly motile cell type. Its inverse expression relationship with MITF is believed to mediate tumour progression and metastasis within this model. Recent evidence has now outlined a potential epigenetic switching mechanism in melanoma cells driven by BRN2 expression that induces melanoma cell invasion. We summarize the role of BRN2 in tumour cell dissemination and metastasis in melanoma, while also examining it as a potential metastatic regulator in other tumour models.
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Affiliation(s)
- Mitchell E Fane
- School of Biomedical Sciences, Institute of Health and Biomedical Innovation at the Translational Research Institute, Queensland University of Technology, Brisbane, QLD, Australia.,Dermatology Research Centre, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Yash Chhabra
- School of Biomedical Sciences, Institute of Health and Biomedical Innovation at the Translational Research Institute, Queensland University of Technology, Brisbane, QLD, Australia.,Dermatology Research Centre, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Aaron G Smith
- School of Biomedical Sciences, Institute of Health and Biomedical Innovation at the Translational Research Institute, Queensland University of Technology, Brisbane, QLD, Australia
| | - Richard A Sturm
- Dermatology Research Centre, UQ Diamantina Institute, Translational Research Institute, The University of Queensland, Brisbane, QLD, Australia
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Wang N, Feng Y, Xu J, Zou J, Chen M, He Y, Liu H, Xue M, Gu Y. miR-362-3p regulates cell proliferation, migration and invasion of trophoblastic cells under hypoxia through targeting Pax3. Biomed Pharmacother 2018; 99:462-468. [PMID: 29665647 DOI: 10.1016/j.biopha.2018.01.089] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/08/2018] [Accepted: 01/16/2018] [Indexed: 12/21/2022] Open
Abstract
Preeclampsia (PE), a common obstetrical disorder, is one of the leading causes of pregnancy associated death. PE is closely linked with impaired migration and invasion ability of trophoblastic cells. miR-362-3p recently received our particular attention due not only to its aberrant expression in the placentas of patients with PE, but also to its important roles in regulating migration and invasion of various cells. This study was thus conducted to investigate the roles of miR-362-3p in PE and the related mechanism. The expression of miR-362-3p and Pax3 was examined in placentas of patients with PE and in normal placentas. HTR8/SVneo cells were cultured under hypoxia and transfected with miR-362-3p mimics, miR-362-3p inhibitors or Pax3 over-expression vectors. Results showed up-regulation of miR-362-3p but down-regulation of Pax3 in placentas of preeclamptic pregnancies. Luciferase report assay confirmed that Pax3 is a direct target of miR-362-3p. Although Pax3 was predicted to be targeted by miR-30a-3p and miR-181a-5p as well, their expression either had no difference between placentas of PE patients and normal placentas or showed less increment in placentas of PE patients than miR-362-3p. Exposure to hypoxia inhibited cell viability, migration and invasion of HTR8/SVneo cells. Increasing miR-362-3p by the mimics conferred improved effects on the inhibition. However, deletion of miR-362-3p or overexpression of Pax3 abolished the inhibiton. These results suggest that miR-362-3p/Pax3 axis regulates cell viability, migration and invasion of HTR8/SVneo cells under hypoxia. The present study adds to the further understanding of the pathogenesis of PE.
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Affiliation(s)
- Nan Wang
- Department of Obstetrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, PR China
| | - Yaling Feng
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China.
| | - Jianjuan Xu
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China
| | - Jinfang Zou
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China
| | - Minghua Chen
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China
| | - Yue He
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China
| | - Huan Liu
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China
| | - Min Xue
- Department of Obstetrics, The Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, PR China
| | - Yanfang Gu
- Department of Obstetrics and Gynecology, Wuxi Matemal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu Province, 214002, PR China.
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7
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Okuno H, Renault Mihara F, Ohta S, Fukuda K, Kurosawa K, Akamatsu W, Sanosaka T, Kohyama J, Hayashi K, Nakajima K, Takahashi T, Wysocka J, Kosaki K, Okano H. CHARGE syndrome modeling using patient-iPSCs reveals defective migration of neural crest cells harboring CHD7 mutations. eLife 2017; 6. [PMID: 29179815 PMCID: PMC5705211 DOI: 10.7554/elife.21114] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 10/22/2017] [Indexed: 12/11/2022] Open
Abstract
CHARGE syndrome is caused by heterozygous mutations in the chromatin remodeler, CHD7, and is characterized by a set of malformations that, on clinical grounds, were historically postulated to arise from defects in neural crest formation during embryogenesis. To better delineate neural crest defects in CHARGE syndrome, we generated induced pluripotent stem cells (iPSCs) from two patients with typical syndrome manifestations, and characterized neural crest cells differentiated in vitro from these iPSCs (iPSC-NCCs). We found that expression of genes associated with cell migration was altered in CHARGE iPSC-NCCs compared to control iPSC-NCCs. Consistently, CHARGE iPSC-NCCs showed defective delamination, migration and motility in vitro, and their transplantation in ovo revealed overall defective migratory activity in the chick embryo. These results support the historical inference that CHARGE syndrome patients exhibit defects in neural crest migration, and provide the first successful application of patient-derived iPSCs in modeling craniofacial disorders. CHARGE syndrome is a disease in which organs including the heart, eyes and ears may not develop properly. The cells that form the tissues affected by CHARGE syndrome develop in embryos from precursor cells called neural crest cells. Individuals with CHARGE syndrome also have mutations in a gene called CHD7. However, it is difficult to examine how CHD7 mutations affect neural crest cells in embryos. In recent years, cell reprogramming techniques have made it possible to create induced pluripotent stem cells (iPSCs) from the specialized somatic cells found in the human body. These iPSCs can be developed into many different cell types, including neural crest cells. Okuno et al. created iPSCs from the skin cells of people with CHARGE syndrome, developed these cells into neural crest cells, and compared them with neural crest cells that were developed from the skin cells of people without CHARGE syndrome. The neural crest cells developed from people with CHARGE syndrome showed multiple abnormalities. For example, they were not able to move around correctly. This is an important observation because neural crest cells must move through tissues to form the various organs affected by CHARGE syndrome. Okuno et al. also observed changes in the activity of many genes other than CHD7 in the neural crest cells developed from CHARGE patients. Further research is now needed to find out which genes are the most important for restoring the normal activity of neural crest cells.
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Affiliation(s)
- Hironobu Okuno
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | | | - Shigeki Ohta
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Kimiko Fukuda
- Department of Biological Science, Tokyo Metropolitan University, Tokyo, Japan
| | - Kenji Kurosawa
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Wado Akamatsu
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan.,Center for Genomic and Regenerative Medicine, Juntendo University School of Medicine, Tokyo, Japan
| | - Tsukasa Sanosaka
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Jun Kohyama
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
| | - Kanehiro Hayashi
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
| | - Kazunori Nakajima
- Department of Anatomy, Keio University School of Medicine, Tokyo, Japan
| | - Takao Takahashi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Joanna Wysocka
- Department of Developmental Biology, Stanford University School of Medicine, Stanford, United States.,Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, United States.,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, United States.,Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, United States
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
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8
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Wang L, Qin L, Li T, Liu H, Ma L, Li W, Wu D, Wang H, Guo Q, Guo L, Liao S. Prenatal diagnosis and genetic counseling for Waardenburg syndrome type I and II in Chinese families. Mol Med Rep 2017; 17:172-178. [PMID: 29115496 PMCID: PMC5780116 DOI: 10.3892/mmr.2017.7874] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 06/14/2017] [Indexed: 01/13/2023] Open
Abstract
Waardenburg syndrome (WS) is an auditory-pigmentary disorder with varying combinations of sensorineural hearing loss and abnormal pigmentation. The present study aimed to investigate the underlying molecular pathology and provide a method of prenatal diagnosis of WS in Chinese families. A total of 11 patients with WS from five unrelated Chinese families were enrolled. A thorough clinical examination was performed on all participants. Furthermore, patients with WS underwent screening for mutations in the following genes: Paired box 3 (PAX3), melanogenesis associated transcription factor (MITF), SRY-box 10, snail family transcriptional repressor 2 and endothelin receptor type B using polymerase chain reaction sequencing. Array-based comparative genomic hybridization was used for specific patients whose sequence results were normal. Following identification of the genotype of the probands and their parents, prenatal genetic diagnosis was performed for family 01 and 05. According to the diagnostic criteria for WS, five cases were diagnosed as WS1, while the other six cases were WS2. Genetic analysis revealed three mutations, including a nonsense mutation PAX3 c.583C>T in family 01, a splice-site mutation MITF c.909G>A in family 03 and an in-frame deletion MITF c.649_651delGAA in family 05. To the best of the authors' knowledge the mutations (c.583C>T in PAX3 and c.909G>A in MITF) were reported for the first time in Chinese people. Mutations in the gene of interest were not identified in family 02 and 04. The prenatal genetic testing of the two fetuses was carried out and demonstrated that the two babies were normal. The results of the present study expanded the range of known genetic mutations in China. Identification of genetic mutations in these families provided an efficient way to understand the causes of WS and improved genetic counseling.
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Affiliation(s)
- Li Wang
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Litao Qin
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Tao Li
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Hongjian Liu
- Department of Otorhinolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Lingcao Ma
- Department of Otorhinolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Wan Li
- Department of Otorhinolaryngology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Dong Wu
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Hongdan Wang
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Qiannan Guo
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Liangjie Guo
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
| | - Shixiu Liao
- Institute of Medical Genetics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, P.R. China
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9
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The Master Neural Transcription Factor BRN2 Is an Androgen Receptor–Suppressed Driver of Neuroendocrine Differentiation in Prostate Cancer. Cancer Discov 2016; 7:54-71. [DOI: 10.1158/2159-8290.cd-15-1263] [Citation(s) in RCA: 212] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 10/20/2016] [Accepted: 10/21/2016] [Indexed: 11/16/2022]
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10
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Kaur A, Webster MR, Weeraratna AT. In the Wnt-er of life: Wnt signalling in melanoma and ageing. Br J Cancer 2016; 115:1273-1279. [PMID: 27764844 PMCID: PMC5129830 DOI: 10.1038/bjc.2016.332] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 09/10/2016] [Accepted: 09/15/2016] [Indexed: 12/21/2022] Open
Abstract
Although the clinical landscape of melanoma is improving rapidly, metastatic melanoma remains a deadly disease. Age remains one of the greatest risk factors for melanoma, and patients older than 55 have a much poorer prognosis than younger individuals, even when the data are controlled for grade and stage. The reasons for this disparity have not been fully uncovered, but there is some recent evidence that Wnt signalling may have a role. Wnt signalling is known to have roles both in cancer progression as well as in organismal ageing. In melanoma, the interplay of Wnt signalling pathways is complex, with different members of the Wnt family guiding different aspects of invasion and proliferation. Here, we will briefly review the current literature addressing the roles of different Wnt pathways in melanoma pathogenesis, provide an overview of Wnt signalling during ageing, and discuss the intersection between melanoma and ageing in terms of Wnt signalling.
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Affiliation(s)
- Amanpreet Kaur
- Tumor Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA.,University of the Sciences, Philadelphia, PA, USA
| | - Marie R Webster
- Tumor Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Ashani T Weeraratna
- Tumor Microenvironment and Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
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11
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do Vale Coelho IE, Arruda DC, Taranto AG. In silico studies of the interaction between BRN2 protein and MORE DNA. J Mol Model 2016; 22:228. [PMID: 27568376 DOI: 10.1007/s00894-016-3078-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 08/03/2016] [Indexed: 01/26/2023]
Abstract
The incidence of skin cancer has increased in recent decades, and melanoma is the most aggressive form with the lowest chance of successful treatment. Currently, drug design projects are in progress, but available treatments against metastatic melanoma have not significantly increased survival, and few patients are cured. Thus, new therapeutic agents should be developed as more effective therapeutic options for melanoma. High levels of the BRN2 transcription factor have been related to melanoma development. However, neither the three-dimensional (3D) structure of BRN2 protein nor its POU domain has been determined experimentally. Construction of the BRN2 3D structure, and the study of its interaction with its DNA target, are important strategies for increasing the structural and functional knowledge of this protein. Thus, the aim of this work was to study the interaction between BRN2 and MORE DNA through in silico methods. The full-length BRN2 3D structure was built using the PHYRE2 and Swiss-Model programs, and molecular dynamics of this protein in complex with MORE DNA was simulated for 20 ns by the NAMD program. The BRN2 model obtained includes helix and loop regions, and the BRN2 POU domain shares structural similarity with other members of the transcription factor family. No significant conformational change of this protein occurred during dynamics simulation. These analyses revealed BRN2 residues important for the specific interaction with nucleotide bases and with more than one DNA nucleotide. This study may contribute to the design of inhibitors against BRN2 or MORE DNA as molecular targets of melanoma skin cancer. Graphical Abstract Model of complete Brn2 protein in complex with MORE DNA after building through comparative modeling and refinement by molecular dynamics simulation.
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Affiliation(s)
- Ivan Evangelista do Vale Coelho
- Laboratório de Química Farmacêutica, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil
| | | | - Alex Gutterres Taranto
- Laboratório de Química Farmacêutica, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinópolis, MG, Brazil.
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12
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Conde-Perez A, Gros G, Longvert C, Pedersen M, Petit V, Aktary Z, Viros A, Gesbert F, Delmas V, Rambow F, Bastian BC, Campbell AD, Colombo S, Puig I, Bellacosa A, Sansom O, Marais R, Van Kempen LCLT, Larue L. A caveolin-dependent and PI3K/AKT-independent role of PTEN in β-catenin transcriptional activity. Nat Commun 2015; 6:8093. [PMID: 26307673 PMCID: PMC4560817 DOI: 10.1038/ncomms9093] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 07/16/2015] [Indexed: 12/22/2022] Open
Abstract
Loss of the tumour suppressor PTEN is frequent in human melanoma, results in MAPK activation, suppresses senescence and mediates metastatic behaviour. How PTEN loss mediates these effects is unknown. Here we show that loss of PTEN in epithelial and melanocytic cell lines induces the nuclear localization and transcriptional activation of β-catenin independent of the PI3K-AKT-GSK3β axis. The absence of PTEN leads to caveolin-1 (CAV1)-dependent β-catenin transcriptional modulation in vitro, cooperates with NRAS(Q61K) to initiate melanomagenesis in vivo and induces efficient metastasis formation associated with E-cadherin internalization. The CAV1-β-catenin axis is mediated by a feedback loop in which β-catenin represses transcription of miR-199a-5p and miR-203, which suppress the levels of CAV1 mRNA in melanoma cells. These data reveal a mechanism by which loss of PTEN increases CAV1-mediated dissociation of β-catenin from membranous E-cadherin, which may promote senescence bypass and metastasis.
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Affiliation(s)
- Alejandro Conde-Perez
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Gwendoline Gros
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Christine Longvert
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Malin Pedersen
- Targeted Therapy Team, The Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK
| | - Valérie Petit
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Zackie Aktary
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Amaya Viros
- Molecular Oncology Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Franck Gesbert
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Véronique Delmas
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Florian Rambow
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Boris C Bastian
- Departments of Dermatology and Pathology and UCSF Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California 94143, USA
| | | | - Sophie Colombo
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | - Isabel Puig
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
| | | | - Owen Sansom
- The Beatson Institute for Cancer Research, Glasgow G61 1BD, UK
| | - Richard Marais
- Molecular Oncology Group, Cancer Research UK Manchester Institute, The University of Manchester, Wilmslow Road, Manchester M20 4BX, UK
| | - Leon C L T Van Kempen
- Department of Pathology, Radboud University Nijmegen Medical Centre, Nijmegen 6500 HB, The Netherlands
- Jewish General Hospital, Lady Davis Institute for Medical Research, Montreal, Quebec QC H3T 1E2, Canada
- Department of Pathology, McGill University, Montreal, Quebec QC H3T 1E2, Canada
| | - Lionel Larue
- Normal and Pathological Development of Melanocytes, Institut Curie, Orsay 91405, France
- CNRS, UMR3347 Bat. 110, Orsay Cedex 91405, France
- INSERM U1021, Orsay Cedex 91405, France
- Equipe labellisée-Ligue Nationale contre le Cancer, Orsay Cedex 91405, France
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13
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Bartlett D, Boyle GM, Ziman M, Medic S. Mechanisms contributing to differential regulation of PAX3 downstream target genes in normal human epidermal melanocytes versus melanoma cells. PLoS One 2015; 10:e0124154. [PMID: 25880082 PMCID: PMC4399949 DOI: 10.1371/journal.pone.0124154] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 03/01/2015] [Indexed: 11/19/2022] Open
Abstract
Melanoma is a highly aggressive and drug resistant form of skin cancer. It arises from melanocytes, the pigment producing cells of the skin. The formation of these melanocytes is driven by the transcription factor PAX3 early during embryonic development. As a result of alternative splicing, the PAX3 gene gives rise to eight different transcripts which encode isoforms that have different structures and activate different downstream target genes involved in pathways of cell proliferation, migration, differentiation and survival. Furthermore, post-translational modifications have also been shown to alter the functions of PAX3. We previously identified PAX3 downstream target genes in melanocytes and melanoma cells. Here we assessed the effects of PAX3 down-regulation on this panel of target genes in primary melanocytes versus melanoma cells. We show that PAX3 differentially regulates various downstream target genes involved in cell proliferation in melanoma cells compared to melanocytes. To determine mechanisms behind this differential downstream target gene regulation, we performed immunoprecipitation to assess post-translational modifications of the PAX3 protein as well as RNAseq to determine PAX3 transcript expression profiles in melanocytes compared to melanoma cells. Although PAX3 was found to be post-translationally modified, there was no qualitative difference in phosphorylation and ubiquitination between melanocytes and melanoma cells, while acetylation of PAX3 was reduced in melanoma cells. Additionally, there were differences in PAX3 transcript expression profiles between melanocytes and melanoma cells. In particular the PAX3E transcript, responsible for reducing melanocyte proliferation and increasing apoptosis, was found to be down-regulated in melanoma cells compared to melanocytes. These results suggest that alternate transcript expression profiles activate different downstream target genes leading to the melanoma phenotype.
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Affiliation(s)
- Danielle Bartlett
- School of Medical Sciences, Edith Cowan University, Perth, Australia
| | - Glen M. Boyle
- Cancer Drug Mechanisms Group, Division of Cancer & Cell Biology, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Mel Ziman
- School of Medical Sciences, Edith Cowan University, Perth, Australia
- School of Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
- * E-mail:
| | - Sandra Medic
- School of Medical Sciences, Edith Cowan University, Perth, Australia
- Curtin Health Innovation Research Institute of Ageing and Chronic Disease, Curtin University, Perth, Australia
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14
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Besch R, Berking C. POU transcription factors in melanocytes and melanoma. Eur J Cell Biol 2014; 93:55-60. [DOI: 10.1016/j.ejcb.2013.10.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 10/18/2013] [Accepted: 10/21/2013] [Indexed: 01/23/2023] Open
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15
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Eccles MR, He S, Ahn A, Slobbe LJ, Jeffs AR, Yoon HS, Baguley BC. MITF and PAX3 Play Distinct Roles in Melanoma Cell Migration; Outline of a "Genetic Switch" Theory Involving MITF and PAX3 in Proliferative and Invasive Phenotypes of Melanoma. Front Oncol 2013; 3:229. [PMID: 24062982 PMCID: PMC3769631 DOI: 10.3389/fonc.2013.00229] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 08/21/2013] [Indexed: 11/13/2022] Open
Abstract
Melanoma is a very aggressive neoplasm with a propensity to undergo progression and invasion early in its evolution. The molecular pathways underpinning invasion in melanoma are now just beginning to be elucidated, but a clear understanding of the transition from non-invasive to invasive melanoma cells remains elusive. Microphthalmia-associated transcription factor (MITF), is thought to be a central player in melanoma biology, and it controls many aspects of the phenotypic expression of the melanocytic lineage. However, recently the paired box transcription factor PAX3 was shown to transcriptionally activate POU3F2/BRN2, leading to direct repression of MITF expression. Here we present a theory to explain melanoma phenotype switching and discuss the predictions that this theory makes. One prediction is that independent and opposing roles for MITF and PAX3 in melanoma would be expected, and we present empirical evidence supporting this: in melanoma tissues PAX3 expression occurs independently of MITF, and PAX3 does not play a key role in melanoma cell proliferation. Furthermore, we show that knockdown of PAX3 inhibits cell migration in a group of "lower MITF" melanoma cell lines, while knockdown of MITF promotes cell migration in a complementary "higher MITF" group of melanoma cell lines. Moreover, the morphological effects of knocking down PAX3 versus MITF in melanoma cells were found to differ. While these data support the notion of independent roles for MITF and PAX3, additional experiments are required to provide robust examination of the proposed genetic switch theory. Only upon clear delineation of the mechanisms associated with progression and invasion of melanoma cells will successful treatments for invasive melanoma be developed.
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Affiliation(s)
- Michael R Eccles
- Department of Pathology, University of Otago , Dunedin , New Zealand
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16
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Abstract
Current models of melanoma propose that transition from the proliferative to the invasive stages of tumor development involves a dynamic and reversible switch in cell phenotype. The almost mutually exclusive proliferative and invasive phenotypes are defined by distinct gene expression signatures, which are themselves controlled by the level of functional MITF protein present in the cell. Recently, new signaling pathways and transcription factors that regulate MITF expression have been defined, and high throughput genomics have identified novel MITF target genes. MITF acts both as a transcription activator to promote expression of genes involved in cell cycle, but also as a transcriptional repressor of genes involved in invasion. A novel human germline mutation in MITF has been identified that blocks its sumoylation, thereby altering its transcriptional properties and conferring an increased risk of melanoma. These new studies depict an ever more complex function for MITF in melanoma.
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Affiliation(s)
- Dana Koludrovic
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/UDS, 1 Rue Laurent Fries, 67404 Illkirch Cédex, France
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17
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Bonaventure J, Domingues MJ, Larue L. Cellular and molecular mechanisms controlling the migration of melanocytes and melanoma cells. Pigment Cell Melanoma Res 2013; 26:316-25. [PMID: 23433358 DOI: 10.1111/pcmr.12080] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 02/07/2013] [Indexed: 10/27/2022]
Abstract
During embryonic development in vertebrates, the neural crest-derived melanoblasts migrate along the dorsolateral axis and cross the basal membrane separating the dermis from the epidermis to reach their final location in the interfollicular epidermis and epidermal hair follicles. Neoplastic transformation converts melanocytes into highly invasive and metastatic melanoma cells. In vitro, these cells extend various types of protrusions and adopt two interconvertible modes of migration, mesenchymal and amoeboid, driven by different signalling molecules. In this review, we describe the major contributions of natural mouse mutants, mouse models generated by genetic engineering and in vitro culture systems, to identification of the genes, signalling pathways and mechanisms regulating the migration of normal and pathological cells of the melanocyte lineage, at both the cellular and molecular levels.
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Affiliation(s)
- Jacky Bonaventure
- Developmental Genetics of Melanocytes, Institut Curie, Centre de Recherche, Orsay, France
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18
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Blumenberg M. Profiling and metaanalysis of epidermal keratinocytes responses to epidermal growth factor. BMC Genomics 2013; 14:85. [PMID: 23391100 PMCID: PMC3608085 DOI: 10.1186/1471-2164-14-85] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 01/11/2013] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND One challenge of systems biology is the integration of new data into the preexisting, and then re-interpretation of the integrated data. Here we use readily available metaanalysis computational methods to integrate new data on the transcriptomic effects of EGF in primary human epidermal keratinocytes with preexisting transcriptomics data in keratinocytes and in EGF-treated non-epidermal cell types. RESULTS We find that EGF promotes keratinocyte proliferation, attachment and motility and, surprisingly, induces DUSPs that attenuate the EGF signal. Our metaanalysis identified overlapping effects of EGF with those of IL-1 and IFNγ, activators of keratinocyte in inflammation and wound healing. We also identified the genes and pathways suppressed by EGF but induced by agents promoting epidermal differentiation. Metaanalysis comparison with the EGF effects in other cell types identified extensive similarities between responses in keratinocytes and in other epithelial cell types, but specific differences with the EGF effects in endothelial cells, and in transformed, oncogenic epithelial cell lines. CONCLUSIONS This work defines the specific transcriptional effects of EGF on human epidermal keratinocytes. Our approach can serve as a suitable paradigm for integration of new omics data into preexisting databases and re-analysis of the integrated data sets.
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Affiliation(s)
- Miroslav Blumenberg
- The R. O. Perelman Department of Dermatology, Department of Biochemistry and Molecular Pharmacology, and the NYU Cancer Institute, NYU Langone Medical Center, 10016, New York, NY, USA.
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19
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Völler D, Ott C, Bosserhoff A. MicroRNAs in malignant melanoma. Clin Biochem 2013; 46:909-17. [PMID: 23360785 DOI: 10.1016/j.clinbiochem.2013.01.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 12/20/2012] [Accepted: 01/14/2013] [Indexed: 12/11/2022]
Abstract
Melanoma is the most aggressive form of skin cancer, and the incidence of melanoma has been increasing faster than that of most other cancers. While the survival rate following surgical resection of early-stage primary tumors is nearly 100%, the survival of patients with metastasized tumors is strongly reduced, likely due to resistance to conventional therapies. Therefore, it is important to use new molecular approaches to develop new biomarkers to better prevent and diagnose melanoma. MicroRNAs (miRNAs) are short non-coding RNAs that post-transcriptionally regulate gene expression via repression of translation or direct degradation of their complementary mRNA. In this review, we summarize our current understanding of the involvement of miRNAs and their corresponding targets in melanomagenesis as well as the potential use of miRNAs as biomarkers.
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Affiliation(s)
- Daniel Völler
- Institute of Pathology, Molecular Pathology, University of Regensburg, Regensburg, Germany
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