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Azizi S, Esmaeili Motlagh P, Eslami S, Ghafouri-Fard S. Association Between RORA Polymorphisms and Obesity. Biochem Genet 2024:10.1007/s10528-024-10768-8. [PMID: 38570441 DOI: 10.1007/s10528-024-10768-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 02/29/2024] [Indexed: 04/05/2024]
Abstract
RORα is a transcription factor encoded by RORA gene. This protein is involved in several metabolic conditions, including obesity. We assessed association between two polymorphisms within this gene (namely rs11639084 and rs4774388) and severe obesity in Iranian population. Both SNPs were associated with obesity in all models (P < 0.0001) except for over-dominant model. T allele of rs11639084 was associated with this trait with OR (95% CI) of 16.85 (13.11-21.67) and was considered as the risk allele. Allelic model best fit the data, since the AIC value for this model was the highest (AIC = 28.82). In the co-dominant model, TT genotype was associated with obesity with OR (95% CI) of 301.6 (137.4-662.1). This genotype was shown to be the risk genotype in the recessive model when compared with TC+CC (OR (95% CI) = 60.54 (30.35-120.7)). The C allele of rs4774388 was shown to be the risk allele with OR (95% CI) of 4.61 (3.72-5.71). In the recessive model, the CC genotype was associated with the mentioned trait with OR (95% CI) of 9.92 (6.62-14.8). This model best fit the data (AIC = 37.08). Cumulatively, the current study suggests contribution of RORα to the pathogenesis of obesity.
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Affiliation(s)
- Shahryar Azizi
- Department of Surgery, Erfan Niayesh Hospital, Tehran, Iran
| | - Parisa Esmaeili Motlagh
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Solat Eslami
- Department of Medical Biotechnology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
- Non-communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Soudeh Ghafouri-Fard
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Kaakour D, Fortin B, Masri S, Rezazadeh A. Circadian Clock Dysregulation and Prostate Cancer: A Molecular and Clinical Overview. Clin Med Insights Oncol 2023; 17:11795549231211521. [PMID: 38033743 PMCID: PMC10683379 DOI: 10.1177/11795549231211521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 10/15/2023] [Indexed: 12/02/2023] Open
Abstract
Circadian clock dysregulation has been implicated in various types of cancer and represents an area of growing research. However, the role of the circadian clock in prostate cancer has been relatively unexplored. This literature review will highlight the potential role of circadian clock dysregulation in prostate cancer by examining molecular, epidemiologic, and clinical data. The influence of melatonin, light, night shift work, chronotherapy, and androgen independence are discussed as they relate to the existing literature on their role in prostate cancer.
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Affiliation(s)
- Dalia Kaakour
- Division of Hematology/Oncology, Department of Medicine, University of California, Irvine, Orange, CA, USA
| | - Bridget Fortin
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA, USA
| | - Selma Masri
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA, USA
| | - Arash Rezazadeh
- Division of Hematology/Oncology, Department of Medicine, University of California, Irvine, Orange, CA, USA
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3
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Kehinde TA, Bhatia A, Olarewaju B, Shoaib MZ, Mousa J, Osundiji MA. Syndromic obesity with neurodevelopmental delay: Opportunities for targeted interventions. Eur J Med Genet 2022; 65:104443. [DOI: 10.1016/j.ejmg.2022.104443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 01/09/2022] [Accepted: 01/22/2022] [Indexed: 01/01/2023]
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L'homme L, Sermikli BP, Molendi-Coste O, Fleury S, Quemener S, Le Maître M, Joseph ML, Pineau L, Duhem C, Gross B, Vallez E, Tailleux A, Staels B, Dombrowicz D. Deletion of the nuclear receptor RORα in macrophages does not modify the development of obesity, insulin resistance and NASH. Sci Rep 2020; 10:21095. [PMID: 33273527 PMCID: PMC7713245 DOI: 10.1038/s41598-020-77858-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 11/02/2020] [Indexed: 11/09/2022] Open
Abstract
Retinoic acid receptor-related orphan receptor-alpha (RORα) is a transcription factor from the nuclear receptor family expressed by immune cells and involved in the development of obesity, insulin resistance (IR) and non-alcoholic steatohepatitis (NASH). It was recently reported that mice deficient for RORα in macrophages develop more severe NASH upon high fat diet (HFD) feeding due to altered Kupffer cell function. To better understand the role of RORα in obesity and IR, we independently generated a macrophage RORα-deficient mouse line. We report that RORα deletion in macrophages does not impact on HFD-induced obesity and IR. Surprisingly, we did not confirm an effect on NASH development upon HFD feeding nor in the more severe and obesity-independent choline-deficient, L-amino acid-defined diet model. Our results therefore show that RORα deletion in macrophages does not alter the development of obesity and IR and question its role in NASH.
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Affiliation(s)
- Laurent L'homme
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Benan Pelin Sermikli
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Olivier Molendi-Coste
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Sébastien Fleury
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Sandrine Quemener
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Mathilde Le Maître
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Marie-Laure Joseph
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Laurent Pineau
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Christian Duhem
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Barbara Gross
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Emmanuelle Vallez
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Anne Tailleux
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - Bart Staels
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France
| | - David Dombrowicz
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000, Lille, France.
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Nuclear Receptors as Regulators of Pituitary Corticotroph Pro-Opiomelanocortin Transcription. Cells 2020; 9:cells9040900. [PMID: 32272677 PMCID: PMC7226830 DOI: 10.3390/cells9040900] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/29/2020] [Accepted: 04/01/2020] [Indexed: 12/16/2022] Open
Abstract
The hypothalamic–pituitary–adrenal (HPA) axis plays a critical role in adaptive stress responses and maintaining organism homeostasis. The pituitary corticotroph is the central player in the HPA axis and is regulated by a plethora of hormonal and stress related factors that synergistically interact to activate and temper pro-opiomelanocortin (POMC) transcription, to either increase or decrease adrenocorticotropic hormone (ACTH) production and secretion as needed. Nuclear receptors are a family of highly conserved transcription factors that can also be induced by various physiologic signals, and they mediate their responses via multiple targets to regulate metabolism and homeostasis. In this review, we summarize the modulatory roles of nuclear receptors on pituitary corticotroph cell POMC transcription, describe the unique and complex role these factors play in hypothalamic–pituitary–adrenal axis (HPA) regulation and discuss potential therapeutic targets in disease states.
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Abstract
Humans as diurnal beings are active during the day and rest at night. This daily oscillation of behavior and physiology is driven by an endogenous circadian clock not environmental cues. In modern societies, changes in lifestyle have led to a frequent disruption of the endogenous circadian homeostasis leading to increased risk of various diseases including cancer. The clock is operated by the feedback loops of circadian genes and controls daily physiology by coupling cell proliferation and metabolism, DNA damage repair, and apoptosis in peripheral tissues with physical activity, energy homeostasis, immune and neuroendocrine functions at the organismal level. Recent studies have revealed that defects in circadian genes due to targeted gene ablation in animal models or single nucleotide polymorphism, deletion, deregulation and/or epigenetic silencing in humans are closely associated with increased risk of cancer. In addition, disruption of circadian rhythm can disrupt the molecular clock in peripheral tissues in the absence of circadian gene mutations. Circadian disruption has recently been recognized as an independent cancer risk factor. Further study of the mechanism of clock-controlled tumor suppression will have a significant impact on human health by improving the efficiencies of cancer prevention and treatment.
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Affiliation(s)
- Nicole M Kettner
- Department of Pediatrics/U.S. Department of Agriculture/Agricultural Research Service/ Children's Nutrition Research Center, Baylor College of Medicine , Houston, TX , USA
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Polymorphisms in twelve candidate genes are associated with growth, muscle lipid profile and meat quality traits in eleven European cattle breeds. Mol Biol Rep 2014; 41:4721-31. [DOI: 10.1007/s11033-014-3343-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 03/21/2014] [Indexed: 10/25/2022]
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Bartle NC, Hill C, Webber L, van Jaarsveld CH, Wardle J. Emergence and persistence of overweight and obesity in 7- to 11-year-old children. Obes Facts 2013; 6:415-23. [PMID: 24107741 PMCID: PMC5644674 DOI: 10.1159/000355677] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 02/17/2013] [Indexed: 11/30/2022] Open
Abstract
AIM After dramatic rises in paediatric obesity, the critical period for obesity onset may now be pre-adolescence. METHODS We monitored adiposity over 4 years in 400 children aged 7-9 years recruited from schools in London. Weight, height, waist circumference (WC) and fat mass were measured annually. Weight status was defined using International Obesity Task Force (IOTF) criteria, and standardised scores and percentiles used British 1990 reference data. RESULTS BMI, WC and fat mass index all tracked strongly over time (average correlation for BMI = 0.95). Emergence of obesity was relatively uncommon: only 2% of the total sample increased from overweight to obese over the 4-year period, and this was nearly matched by the 1.3% that reduced from obese to overweight. However, more children (6%) moved from healthy weight to overweight than the reverse direction (2%). There were greater absolute gains in adiposity in children with higher baseline weight status, but this was disguised in analyses using standardised scores. Obesity was not an emergent trait in middle childhood, but rates were already high and, in absolute terms, adiposity increased more in overweight and obese than healthy weight children. CONCLUSION These results highlight the need for active management of obesity in middle childhood.
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Affiliation(s)
- Naomi C. Bartle
- Coventry University, Priory Street, Coventry, London, UK
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Claire Hill
- Department of Psychology, Royal Holloway, University of London, Surrey, UK
| | | | | | - Jane Wardle
- Department of Epidemiology and Public Health, University College London, London, UK
- *Prof. Dr. Jane Wardle, Department of Epidemiology and Public Health, Health Behaviour Research Centre, University College London, Gower Street, London, WC1E 6BT (UK),
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Jetten AM, Kang HS, Takeda Y. Retinoic acid-related orphan receptors α and γ: key regulators of lipid/glucose metabolism, inflammation, and insulin sensitivity. Front Endocrinol (Lausanne) 2013; 4:1. [PMID: 23355833 PMCID: PMC3555121 DOI: 10.3389/fendo.2013.00001] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 01/05/2013] [Indexed: 01/07/2023] Open
Abstract
Retinoic acid-related orphan receptors RORα and RORγ play a regulatory role in lipid/glucose homeostasis and various immune functions, and have been implicated in metabolic syndrome and several inflammatory diseases. RORα-deficient mice are protected against age- and diet-induced obesity, hepatosteatosis, and insulin resistance. The resistance to hepatosteatosis in RORα-deficient mice is related to the reduced expression of several genes regulating lipid synthesis, transport, and storage. Adipose tissue-associated inflammation, which plays a critical role in the development of insulin resistance, is considerably diminished in RORα-deficient mice as indicated by the reduced infiltration of M1 macrophages and decreased expression of many proinflammatory genes. Deficiency in RORγ also protects against diet-induced insulin resistance by a mechanism that appears different from that in RORα deficiency. Recent studies indicated that RORs provide an important link between the circadian clock machinery and its regulation of metabolic genes and metabolic syndrome. As ligand-dependent transcription factors, RORs may provide novel therapeutic targets in the management of obesity and associated metabolic diseases, including hepatosteatosis, adipose tissue-associated inflammation, and insulin resistance.
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Affiliation(s)
- Anton M. Jetten
- *Correspondence: Anton M. Jetten, Cell Biology Section, Division of Intramural Research, National Institute of Environmental Health Sciences, National Institutes of Health, 111 T.W. Alexander Drive, Research Triangle Park, NC 27709, USA. e-mail:
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Dasouki MJ, Youngs EL, Hovanes K. Structural Chromosome Abnormalities Associated with Obesity: Report of Four New subjects and Review of Literature. Curr Genomics 2011; 12:190-203. [PMID: 22043167 PMCID: PMC3137004 DOI: 10.2174/138920211795677930] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 03/29/2011] [Accepted: 03/30/2011] [Indexed: 11/22/2022] Open
Abstract
Obesity in humans is a complex polygenic trait with high inter-individual heritability estimated at 40-70%. Candidate gene, DNA linkage and genome-wide association studies (GWAS) have allowed for the identification of a large set of genes and genomic regions associated with obesity. Structural chromosome abnormalities usually result in congenital anomalies, growth retardation and developmental delay. Occasionally, they are associated with hyperphagia and obesity rather than growth delay. We report four new individuals with structural chromosome abnormalities involving 10q22.3-23.2, 16p11.2 and Xq27.1-q28 chromosomal regions with early childhood obesity and developmental delay. We also searched and summarized the literature for structural chromosome abnormalities reported in association with childhood obesity.
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Affiliation(s)
- Majed J Dasouki
- Departments of Pediatrics and Internal Medicine, Kansas University Medical Center, Kansas City, Kansas, USA
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11
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Schaumberg DA, Chasman D, Morrison MA, Adams SM, Guo Q, Hunter DJ, Hankinson SE, DeAngelis MM. Prospective study of common variants in the retinoic acid receptor-related orphan receptor α gene and risk of neovascular age-related macular degeneration. ACTA ACUST UNITED AC 2010; 128:1462-71. [PMID: 21060049 DOI: 10.1001/archophthalmol.2010.261] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVES The retinoic acid receptor (RAR)-related orphan receptor α gene (RORA) is implicated as a candidate for age-related macular degeneration (AMD) through a previous microarray expression study, linkage data, biological plausibility, and 2 clinic-based cross-sectional studies. We aimed to determine if common variants in RORA predict future risk of neovascular AMD. METHODS We measured genotypes for 18 variants in intron 1 of the RORA gene among 164 cases who developed neovascular AMD and 485 age- and sex-matched controls in a prospective, nested, case-control study within the Nurses' Health Study and the Health Professionals Follow-up Study. We determined the incidence rate ratios and 95% confidence intervals (CI) for neovascular AMD for each variant and examined interactions with other AMD-associated variants and modifiable risk factors. RESULTS We identified one single-nucleotide polymorphism (rs12900948) that was significantly associated with increased incidence of neovascular AMD. Participants with 1 and 2 copies of the G allele were 1.73 (CI, 1.32-2.27) and 2.99 (CI, 1.74-5.14) times more likely to develop neovascular AMD. Individuals homozygous for both the G allele of rs12900948 and ARMS2 A69S had a 40.8-fold increased risk of neovascular AMD (CI, 10.1-164; P = .017). Cigarette smokers who carried 2 copies of the G allele had a 9.89-fold risk of neovascular AMD but the interaction was not significant (P = .08). We identified a significant AMD-associated haplotype block containing the single-nucleotide polymorphisms rs730754, rs8034864, and rs12900948, with P values for ACA = 1.16 × 10(-9), ACG = 5.85 × 10(-12), and GAA = .0001 when compared with all other haplotypes. CONCLUSIONS Common variants and haplotypes within the RORA gene appear to act synergistically with the ARMS2 A69S polymorphism to increase risk of neovascular AMD. These data add further evidence of a high level of complexity linking genetic and modifiable risk factors to AMD development and should help efforts at risk prediction.
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Affiliation(s)
- Debra A Schaumberg
- Division of Preventive Medicine, Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02215, USA.
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Utge SJ, Soronen P, Loukola A, Kronholm E, Ollila HM, Pirkola S, Porkka-Heiskanen T, Partonen T, Paunio T. Systematic analysis of circadian genes in a population-based sample reveals association of TIMELESS with depression and sleep disturbance. PLoS One 2010; 5:e9259. [PMID: 20174623 PMCID: PMC2823770 DOI: 10.1371/journal.pone.0009259] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 01/27/2010] [Indexed: 11/28/2022] Open
Abstract
Disturbances in the circadian pacemaker system are commonly found in individuals with depression and sleep-related problems. We hypothesized that some of the canonical circadian clock genes would be associated with depression accompanied by signs of disturbed sleep, early morning awakening, or daytime fatigue. We tested this hypothesis in a population-based sample of the Health 2000 dataset from Finland, including 384 depressed individuals and 1270 controls, all with detailed information on sleep and daytime vigilance, and analyzed this set of individuals with regard to 113 single-nucleotide polymorphisms of 18 genes of the circadian system. We found significant association between TIMELESS variants and depression with fatigue (D+FAT+) (rs7486220: pointwise P = 0.000099, OR = 1.66; corrected empirical P for the model of D+FAT+ = 0.0056; haplotype 'C-A-A-C' of rs2291739-rs2291738-rs7486220-rs1082214: P = 0.0000075, OR = 1.72) in females, and association to depression with early morning awakening (D+EMA+) (rs1082214: pointwise P = 0.0009, OR = 2.70; corrected empirical P = 0.0374 for the model D+EMA+; haplotype 'G-T' of rs7486220 and rs1082214: P = 0.0001, OR = 3.01) in males. There was significant interaction of gender and TIMELESS (for example with rs1082214, P = 0.000023 to D+EMA+ and P = 0.005 to D+FAT+). We obtained supported evidence for involvement of TIMELESS in sleeping problems in an independent set of control individuals with seasonal changes in mood, sleep duration, energy level and social activity in females (P = 0.036, = 0.123 for rs1082214) and with early morning awakening or fatigue in males (P = 0.038 and P = 0.0016, respectively, for rs1082214). There was also some evidence of interaction between TIMELESS and PER1 in females to D+FAT+ as well as between TIMELESS and ARNTL, RORA or NR1D1 in males to D+EMA+. These findings support a connection between circadian genes and gender-dependent depression and defective sleep regulation.
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Affiliation(s)
- Siddheshwar J. Utge
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Physiology, University of Helsinki, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Pia Soronen
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Anu Loukola
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Erkki Kronholm
- Department of Chronic Disease Prevention, Population Studies Unit, National Institute for Health and Welfare, Turku, Finland
| | - Hanna M. Ollila
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Physiology, University of Helsinki, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
| | - Sami Pirkola
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
| | | | - Timo Partonen
- Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
| | - Tiina Paunio
- Public Health Genomics Unit, National Institute for Health and Welfare, Helsinki, Finland
- Department of Psychiatry, Helsinki University Central Hospital, Helsinki, Finland
- Institute for Molecular Medicine Finland FIMM, University of Helsinki, Helsinki, Finland
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13
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Meissburger B, Wolfrum C. The role of retinoids and their receptors in metabolic disorders. EUR J LIPID SCI TECH 2008. [DOI: 10.1002/ejlt.200700291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Lane TM, Strefford JC, Yáñez-Muñoz RJ, Purkis P, Forsythe E, Nia T, Hines J, Lu YJ, Oliver RT. Identification of a recurrent t(4;6) chromosomal translocation in prostate cancer. J Urol 2007; 177:1907-12. [PMID: 17437846 DOI: 10.1016/j.juro.2007.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2006] [Indexed: 11/26/2022]
Abstract
PURPOSE We developed and describe a practical method by which primary prostate cancer specimens can be screened for recurrent chromosomal translocations, which is a potential source of fusion genes, as well as a process by which identified translocations can be mapped to define the genes involved. MATERIALS AND METHODS A series of 7 prostate cancer cell lines and 25 transiently established primary cell cultures, which were sourced from tissue harvested at 16 radical prostatectomies and 9 channel transurethral prostate resections, were screened for chromosomal translocations using multiplex-fluorescence in situ hybridization technology. A series of fluorescence in situ hybridization based breakpoint mapping experiments were performed to identify candidate genes involved in regions associated with recurrent translocation. RESULTS Our analysis identified the repetition of 2 translocations in prostate cancer lines, that is t(1;15) and t(4;6), at a frequency of 28% and 57%, respectively. More significantly 4 of the 25 subsequently established primary cultures (16%) also revealed a t(4;6) translocation. Using the LNCaP cell line the breakpoints involved were mapped to the t(4;6)(q22;q15) region and a number of candidate genes were identified. CONCLUSIONS We found that the t(4;6) translocation is also a repeat event in primary cell cultures from malignant prostate cancer. Breakpoint mapping showed that the gene UNC5C loses its promoter and first exon as a direct result of the translocation in the 4q22 region. As such, we identified it as a possible contributor to a putative fusion gene in prostate cancer.
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Affiliation(s)
- Tim M Lane
- Department of Medical Oncology, St. Bartholomew's Hospital, Queen Mary Wesfield School of Medicine, Queen Mary University, London, United Kingdom.
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Mansouri MR, Carlsson B, Davey E, Nordenskjöld A, Wester T, Annerén G, Läckgren G, Dahl N. Molecular genetic analysis of a de novo balanced translocation t(6;17)(p21.31;q11.2) associated with hypospadias and anorectal malformation. Hum Genet 2006; 119:162-8. [PMID: 16395596 DOI: 10.1007/s00439-005-0122-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2005] [Accepted: 12/09/2005] [Indexed: 10/25/2022]
Abstract
We report a young boy with penoscrotal hypospadias, anal atresia (AA) with a recto-urethral fistula, a hypoplastic kidney and a balanced translocation t(6;17)(p21.31;q11.2). Physical mapping of the breakpoints localized the chromosome 6 breakpoint within an intron of the gene lipoma HMGIC fusion partner-like 5 (LHFPL5) whereas the chromosome 17 breakpoint was mapped to the first intron of the 182-FIP gene encoding the Fragile X Mental Retardation Protein Interacting Protein. Sequence analysis across the breakpoints revealed an almost perfectly balanced translocation with a 2 bp deletion on the derivative chromosome 6 and a 7 bp duplication on the derivative chromosome 17. We identified a fusion transcript consisting of the first exon of 182-FIP and the last exon of LHFPL5 in patient-derived cells. Quantitative expression analysis of the genes flanking the breakpoints, revealed increased transcript levels for SFRS protein kinase 1 (SRPK1) and TAO kinase 1 (TAOK1) which suggests a positional effect due to the translocation. We hypothesize that the urogenital and anorectal malformations in the patient result from one or several mechanisms including disruption of the genes 182-FIP and LHFPL5, altered expression of the genes flanking the translocation breakpoints and, a gain of function mechanism mediated by the 182-FIP-LHFPL5 fusion transcript.
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Affiliation(s)
- Mahmoud Reza Mansouri
- Department of genetics and pathology, Section of Clinical Genetics The Rudbeck laboratory, Uppsala University, 751 85 Uppsala, Sweden
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