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Canales-Cortés S, Rodríguez-Arribas M, Galindo MF, Jordan J, Casado-Naranjo I, Fuentes JM, Yakhine-Diop SMS. Vitamin D Receptor Polymorphisms in a Spanish Cohort of Parkinson's Disease Patients. Genet Test Mol Biomarkers 2024; 28:59-64. [PMID: 38416664 DOI: 10.1089/gtmb.2023.0344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024] Open
Abstract
Background: Vitamin D receptor (VDR) is a nuclear hormone receptor widely expressed in the substantia nigra. Its association with an increased risk of Parkinson's disease (PD) is based on vitamin D deficiency and/or different polymorphisms in its gene receptor. This fact has been demonstrated by several case-control studies. Materials and Methods: Consequently, we investigated the association between VDR ApaI, BsmI, FokI, and TaqI gene polymorphisms and PD in a Spanish cohort that included 54 cases and 17 healthy controls. The detection of single nucleotide polymorphisms (SNPs) was performed using a polymerase chain reaction-restriction fragment length polymorphism. Results: Our data indicate that the SNPs were not associated with the age of onset of PD, nor with the occurrence of motor symptoms. However, only BsmI polymorphism was significantly associated with PD in this Spanish cohort. In fact, BsmI genotype was five times higher among PD patients than among controls, and the A allele was considered as a genetic risk for PD. Additionally, the combination of FokI and BsmI polymorphisms was significantly associated with PD and could represent a risk factor. Conclusion: We conclude that ApaI, TaqI, and FokI polymorphisms were not associated with PD, but BsmI could be a risk factor for PD in this randomized population.
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Affiliation(s)
- Saray Canales-Cortés
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
| | - Mario Rodríguez-Arribas
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carloss III (CIBER-CIBERNED-ISCIII), Madrid, Spain
| | - María F Galindo
- Pharmaceutical Technologic, Medical Sciences Department, Albacete School of Pharmacy, University of Castilla-La Mancha, Albacete, Spain
| | - Joaquín Jordan
- Pharmacology, Medical Sciences Department, Albacete School of Medicine, University of Castilla-La Mancha, Albacete, Spain
| | - Ignacio Casado-Naranjo
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carloss III (CIBER-CIBERNED-ISCIII), Madrid, Spain
- Complejo Hospitalario Universitario de Cáceres, Cáceres, Spain
| | - José M Fuentes
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carloss III (CIBER-CIBERNED-ISCIII), Madrid, Spain
| | - Sokhna M S Yakhine-Diop
- Departamento de Bioquímica y Biología Molecular y Genética, Facultad de Enfermería y Terapia Ocupacional, Universidad de Extremadura, Cáceres, Spain
- Instituto Universitario de Investigación Biosanitaria de Extremadura (INUBE), Cáceres, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carloss III (CIBER-CIBERNED-ISCIII), Madrid, Spain
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Giorgio ED, Cutano V, Minisini M, Tolotto V, Dalla E, Brancolini C. A regulative epigenetic circuit supervised by HDAC7 represses IGFBP6 and IGFBP7 expression to sustain mammary stemness. Epigenomics 2021; 13:683-698. [PMID: 33878891 DOI: 10.2217/epi-2020-0347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background: In the breast, the pleiotropic epigenetic regulator HDAC7 can influence stemness. Materials & Methods: The authors used MCF10 cells knocked-out for HDAC7 to explore the contribution of HDAC7 to IGF1 signaling. Results: HDAC7 buffers H3K27ac levels at the IGFBP6 and IGFBP7 genomic loci and influences their expression. In this manner, HDAC7 can tune IGF1 signaling to sustain stemness. In HDAC7 knocked-out cells, RXRA promotes the upregulation of IGFBP6/7 mRNAs. By contrast, HDAC7 increases FABP5 expression, possibly through repression of miR-218. High levels of FABP5 can reduce the delivery of all-trans-retinoic acid to RXRA. Accordingly, the silencing of FABP5 increases IGFBP6 and IGFBP7 expression and reduces mammosphere generation. Conclusion: The authors propose that HDAC7 controls the uptake of all-trans-retinoic acid, thus influencing RXRA activity and IGF1 signaling.
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Affiliation(s)
- Eros Di Giorgio
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
| | - Valentina Cutano
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
| | - Martina Minisini
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
| | - Vanessa Tolotto
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
| | - Emiliano Dalla
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
| | - Claudio Brancolini
- Department of Medicine, Università degli Studi di Udine. P.le Kolbe 4, Udine, 33100, Italy
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3
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Ciulei G, Orasan OH, Coste SC, Cozma A, Negrean V, Procopciuc LM. Vitamin D and the insulin-like growth factor system: Implications for colorectal neoplasia. Eur J Clin Invest 2020; 50:e13265. [PMID: 32379895 DOI: 10.1111/eci.13265] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/30/2020] [Accepted: 05/03/2020] [Indexed: 12/17/2022]
Abstract
Epidemiological studies have strongly associated lower levels of vitamin D and its metabolites with an increased risk of colorectal cancer (CRC). The action of calcitriol, the active metabolite of vitamin D, is mediated by the vitamin D receptor (VDR) that is present in most tissues. In advanced CRC, VDR expression is lowered. Calcitriol has several antineoplastic effects in CRC: it promotes the G1-phase cycle arrest, lowers vascular endothelial growth factor (VEGF) synthesis and acts on tumour stromal fibroblasts to limit cell migration and angiogenesis. Hyperinsulinemia and insulin-like growth factors (IGFs) have been implicated in the pathophysiology of CRC. IGF-1 and IGFBP-3 have been the most studied components of the IGF system. Only 1% of the total serum IGF-1 is free and bioactive, and 80% of it binds to IGFBP-3. IGF-1 and its receptor IGF-1R are known to induce cell proliferation. Both IGF-1 and IGFBP-3 can favour angiogenesis by increasing the transcription of the VEGF gene. A high serum IGF-1/IGFBP-3 ratio is associated with increased risk for CRC. VDR is a transcription factor for the IGFBP-3 gene, and IGF-1 can increase calcitriol synthesis. Studies examining the effect of vitamin D treatment on serum IGF-1 and IGFBP-3 have not been in agreement since different populations, dosages and intervention periods have been used. New vitamin D treatment studies that examine CRC should take in account confounding factors such as obesity or VDR genotypes.
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Affiliation(s)
- George Ciulei
- Department 5 Internal Medicine, 4th Medical Clinic, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Olga Hilda Orasan
- Department 5 Internal Medicine, 4th Medical Clinic, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Sorina Cezara Coste
- Department 5 Internal Medicine, 4th Medical Clinic, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Angela Cozma
- Department 5 Internal Medicine, 4th Medical Clinic, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Vasile Negrean
- Department 5 Internal Medicine, 4th Medical Clinic, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Lucia Maria Procopciuc
- Department 3 Molecular Sciences, Medical Biochemistry, Iuliu Hațieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
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Varma Shrivastav S, Bhardwaj A, Pathak KA, Shrivastav A. Insulin-Like Growth Factor Binding Protein-3 (IGFBP-3): Unraveling the Role in Mediating IGF-Independent Effects Within the Cell. Front Cell Dev Biol 2020; 8:286. [PMID: 32478064 PMCID: PMC7232603 DOI: 10.3389/fcell.2020.00286] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 04/02/2020] [Indexed: 12/22/2022] Open
Abstract
Insulin-like growth factor (IGF) binding protein-3 (IGFBP-3), one of the six members of the IGFBP family, is a key protein in the IGF pathway. IGFBP-3 can function in an IGF-dependent as well as in an IGF-independent manner. The IGF-dependent roles of IGFBP-3 include its endocrine role in the delivery of IGFs from the site of synthesis to the target cells that possess IGF receptors and the activation of associated downstream signaling. IGF-independent role of IGFBP-3 include its interactions with the proteins of the extracellular matrix and the proteins of the plasma membrane, its translocation through the plasma membrane into the cytoplasm and into the nucleus. The C-terminal domain of IGFBP-3 has the ability to undergo cell penetration therefore, generating a short 8-22-mer C-terminal domain peptides that can be conjugated to drugs or genes for effective intracellular delivery. This has opened doors for biotechnological applications of the molecule in molecular medicine. The aim of this this review is to summarize the complex roles of IGFBP-3 within the cell, including its mechanisms of cellular uptake and its translocation into the nucleus, various molecules with which it is capable of interacting, and its ability to regulate IGF-independent cell growth, survival and apoptosis. This would pave way into understanding the modus operandi of IGFBP-3 in regulating IGF-independent processes and its pleiotropic ability to bind with potential partners thus regulating several cellular functions implicated in metabolic diseases, including cancer.
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Affiliation(s)
- Shailly Varma Shrivastav
- VastCon Inc., Winnipeg, MB, Canada.,Department of Biology, University of Winnipeg, Winnipeg, MB, Canada
| | - Apurva Bhardwaj
- Department of Biology, University of Winnipeg, Winnipeg, MB, Canada
| | - Kumar Alok Pathak
- Research Institute of Oncology and Hematology, CancerCare Manitoba, Winnipeg, MB, Canada.,Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - Anuraag Shrivastav
- Department of Biology, University of Winnipeg, Winnipeg, MB, Canada.,Research Institute of Oncology and Hematology, CancerCare Manitoba, Winnipeg, MB, Canada
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5
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Lee TW, Lee TI, Lin YK, Kao YH, Chen YJ. Calcitriol downregulates fibroblast growth factor receptor 1 through histone deacetylase activation in HL-1 atrial myocytes. J Biomed Sci 2018; 25:42. [PMID: 29776409 PMCID: PMC5960138 DOI: 10.1186/s12929-018-0443-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 05/02/2018] [Indexed: 12/14/2022] Open
Abstract
Background Fibroblast growth factor (FGF)-2 plays a crucial role in the pathophysiology of cardiovascular diseases (CVDs). FGF-2 was reported to induce cardiac hypertrophy through activation of FGF receptor 1 (FGFR1). Multiple laboratory findings indicate that calcitriol may be a potential treatment for CVDs. In this study, we attempted to investigate whether calcitriol regulates FGFR1 expression to modulate the effects of FGF-2 signaling in cardiac myocytes and explored the potential regulatory mechanism. Methods Western blot, polymerase chain reaction, small interfering RNA, fluorometric activity assay, and chromatin immunoprecipitation (ChIP) analyses were used to evaluate FGFR1, FGFR2, FGFR3, FGFR4, phosphorylated extracellular signal-regulated kinase (p-ERK), β-myosin heavy chain (β-MHC), phosphorylated phospholipase Cγ (p-PLCγ), nuclear factor of activated T cells (NFAT), and histone deacetylase (HDAC) expressions and enzyme activities in HL-1 atrial myocytes without and with calcitriol (1 and 10 nM) treatment, in the absence and presence of FGF-2 (25 ng/mL) or suberanilohydroxamic acid (SAHA, a pan-HDAC inhibitor, 1 μM). Results We found that calcitriol-treated HL-1 cells had significantly reduced FGFR1 expression compared to control cells. In contrast, expressions of FGFR2, FGFR3, and FGFR4 were similar between calcitriol-treated and control HL-1 cells. FGF-2-treated HL-1 cells had similar PLCγ phosphorylation and nuclear/cytoplasmic NFAT expressions compared to control cells. FGF-2 induced lower expressions of p-ERK and β-MHC in calcitriol-treated HL-1 cells than in control cells. FGFR1-knockdown blocked FGF-2 signaling and reversed the protective effects of calcitriol. Compared to control cells, calcitriol-treated HL-1 cells had higher nuclear HDAC activity. The ChIP analysis demonstrated a significant decrease in acetyl-histone H4, which is associated with an increase in HDAC3 in the FGFR1 promoter. Calcitriol-mediated FGFR1 downregulation was attenuated in the presence of SAHA. Conclusions Calcitriol diminished FGFR1 expression through HDAC activation, which ameliorated the harmful effects of FGF-2 on cardiac myocytes.
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Affiliation(s)
- Ting-Wei Lee
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, 250 Wu-Xing Street, Taipei, 11031, Taiwan.,Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Ting-I Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Department of General Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yung-Kuo Lin
- Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Division of Cardiology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Hsun Kao
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, 250 Wu-Xing Street, Taipei, 11031, Taiwan. .,Department of Medical Education and Research, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
| | - Yi-Jen Chen
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, 250 Wu-Xing Street, Taipei, 11031, Taiwan. .,Division of Cardiovascular Medicine, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
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6
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Marwaha RK, Garg MK, Gupta S, Ganie MA, Gupta N, Narang A, Shukla M, Arora P, Singh A, Chadha A, Mithal A. Association of insulin-like growth factor-1 and IGF binding protein-3 with 25-hydroxy vitamin D in pre-pubertal and adolescent Indian girls. J Pediatr Endocrinol Metab 2018; 31:289-295. [PMID: 29470176 DOI: 10.1515/jpem-2017-0275] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Accepted: 12/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND There is a high prevalence of vitamin D deficiency (VDD) in India. Molecular mechanisms suggest a strong relationship between vitamin D and growth factors. However, there is a paucity of literature with regard to a relationship between insulin-like growth factor-1 (IGF-1), insulin-like growth factor binding protein-3 (IGFBP-3) and vitamin D particularly in subjects with VDD. The objective of the study was to assess the relationship between growth factors and serum vitamin D-parathormone (PTH) status in school girls and study the impact of vitamin D supplementation on growth factors in pre-pubertal girls with VDD. METHODS Our study subjects were apparently healthy school girls aged 6-18 years. The baseline height, weight, body mass index (BMI), pubertal status, serum 25-hydroxy vitamin D (25OHD), PTH, IGF-1 and IGFBP-3 were assessed in 847 girls aged 6-18 years and in 190 pre-pubertal girls with VDD following supplementation. RESULTS The mean age, BMI and serum 25OHD of girls were 11.5±3.2 years, 18.7±4.8 kg/m2 and 9.9±5.6 ng/mL, respectively. VDD was observed in 94.6% of girls. Unadjusted serum IGF-1 levels and IGF-1/IGFBP-3 molar ratio were significantly higher in girls with severe VDD as compared to girls with mild-to-moderate VDD. However, these differences disappeared when adjusted for age, height or sexual maturation. The serum IGF-1 and IGFBP-3 levels increased significantly post supplementation with vitamin D. CONCLUSIONS There were no differences in serum IGF-1 levels and the IGF-1/IGFBP-3 molar ratio among VDD categories when adjusted for age, height and sexual maturation in girls. Vitamin D supplementation resulted in a significant increase in serum IGF-1 levels in VDD pre-pubertal girls.
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Affiliation(s)
- Ramank K Marwaha
- Senior Consultant Endocrinology and Scientific Advisor (Projects), ILSI-India, Flat No. 17, Gautam Apartments, Gautam Nagar, New Delhi 110049, India
| | - M K Garg
- Officer's Training College, Lucknow, India
| | - Sushil Gupta
- Department of Endocrinology, Sanjay Gandhi Post Graduate Institute, Lucknow, India
| | | | - Nandita Gupta
- Department of Endocrinology and Metabolism, AIIMS, New Delhi, India
| | - Archna Narang
- Department of Medicine, Sur Homeopathic College, New Delhi, India
| | - Manoj Shukla
- Sanjay Gandhi Post Graduate Institute, Lucknow, India
| | - Preeti Arora
- Central Council of Research in Homeopathy, Ministry of Ayush, New Delhi, India
| | - Annie Singh
- Central Council of Research in Homeopathy, Ministry of Ayush, New Delhi, India
| | | | - Ambrish Mithal
- Department of Endocrinology and Metabolism, Medanta Hospital, Gurugram, Haryana, India
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Moreno-Santos I, Castellano-Castillo D, Lara MF, Fernandez-Garcia JC, Tinahones FJ, Macias-Gonzalez M. IGFBP-3 Interacts with the Vitamin D Receptor in Insulin Signaling Associated with Obesity in Visceral Adipose Tissue. Int J Mol Sci 2017; 18:E2349. [PMID: 29112142 PMCID: PMC5713318 DOI: 10.3390/ijms18112349] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/29/2017] [Accepted: 11/01/2017] [Indexed: 01/04/2023] Open
Abstract
Adipose tissue has traditionally only been considered as an energy storage organ. Nevertheless, the importance of this tissue in systemic physiology and, especially, in systemic inflammation has been highlighted in recent years. Adipose tissue expresses proteins related to vitamin D (VD) metabolism, and it has been proposed that it can act as a VD storage tissue. The active form of VD, 1,25-dihydroxyvitamin D3 (1,25(OH)₂D₃), is able to modify adipocyte and adipose tissue physiology via the VD receptor (VDR), decreasing the expression of pro-inflammatory cytokines in adipose tissue. Moreover, VD deficiency and VDR has been reported to be associated with obesity and diabetes. However, the results of the different studies are not conclusive. Insulin growth binding proteins (IGFBPs) have been identified in adipose tissue, but their roles are poorly understood. Therefore, the objective of this study was to analyze the plasma levels of VD and the gene expression of VDR in the adipose tissue of subjects with morbid obesity (MO) and with different degrees of insulin resistance (IR), as well as the functionality of direct interaction between IGFBP-3 and VDR, which could explain its inhibitory role in adipogenesis. Our results show a novel role of the VD system in the regulation and activation of IGFBP-3 in visceral adipose tissue (VAT) of patients with MO, as a new and alternative mechanism proposed in the insulin signaling associated with obesity.
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Affiliation(s)
- Inmaculada Moreno-Santos
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
- CIBER Pathophysiology of Obesity and Nutrition (CB06/03), 29010 Málaga, Spain.
| | - Daniel Castellano-Castillo
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
- CIBER Pathophysiology of Obesity and Nutrition (CB06/03), 29010 Málaga, Spain.
| | - María Fernanda Lara
- Department of Urology, Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
| | - Jose Carlos Fernandez-Garcia
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
- CIBER Pathophysiology of Obesity and Nutrition (CB06/03), 29010 Málaga, Spain.
| | - Francisco Jose Tinahones
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
- CIBER Pathophysiology of Obesity and Nutrition (CB06/03), 29010 Málaga, Spain.
| | - Manuel Macias-Gonzalez
- Unidad de Gestión Clínica Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Complejo Hospitalario de Málaga (Virgen de la Victoria)/Universidad de Málaga, 29010 Málaga, Spain.
- CIBER Pathophysiology of Obesity and Nutrition (CB06/03), 29010 Málaga, Spain.
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Neme A, Nurminen V, Seuter S, Carlberg C. The vitamin D-dependent transcriptome of human monocytes. J Steroid Biochem Mol Biol 2016; 164:180-187. [PMID: 26523676 DOI: 10.1016/j.jsbmb.2015.10.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/05/2015] [Accepted: 10/25/2015] [Indexed: 11/28/2022]
Abstract
Monocytes are important cells of the innate immune system that can differentiate into macrophages and dendritic cells. The biologically active form of vitamin D, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3), serves as a ligand of the nuclear receptor vitamin D receptor (VDR). A key physiological function of 1,25(OH)2D3 is the defense against pathogens, such as those causing tuberculosis, that involves the modulation of the monocyte transcriptome. THP-1 cells are an established model of human monocytes, for which the at present largest set of 1,25(OH)2D3-affected genome-wide data are available. Here we summarize the insight obtained from the recent transcriptome of 1,25(OH)2D3-stimulated THP-1 cells, that was determined by triplicate RNA sequencing (RNA-seq). Primary and secondary vitamin D target genes being up- and down-regulated were related to changes in the epigenome of THP-1 cells, such as 1,25(OH)2D3-dependent chromatin opening and modulation of the genome-wide association of the transcription factors VDR and CCCTC-binding factor (CTCF) with their respective genomic binding sites. The anti-microbial response is the top-ranking early physiological function represented by 1,25(OH)2D3-stimulated genomic regions and genes, but also other immunity-related pathways, such as IL10 signaling, are activated. Taken together, the epigenomic and transcriptomic responses of THP-1 cells to 1,25(OH)2D3 represent a master example of the impact of vitamin D on human physiology.
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Affiliation(s)
- Antonio Neme
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
| | - Veijo Nurminen
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
| | - Sabine Seuter
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
| | - Carsten Carlberg
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland.
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9
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Seuter S, Neme A, Carlberg C. Epigenome-wide effects of vitamin D and their impact on the transcriptome of human monocytes involve CTCF. Nucleic Acids Res 2016; 44:4090-104. [PMID: 26715761 PMCID: PMC4872072 DOI: 10.1093/nar/gkv1519] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 12/15/2015] [Accepted: 12/19/2015] [Indexed: 11/13/2022] Open
Abstract
The physiological functions of vitamin D are mediated by its metabolite 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) activating the transcription factor vitamin D receptor (VDR). In THP-1 human monocytes we demonstrated epigenome-wide effects of 1,25(OH)2D3 at 8979 loci with significantly modulated chromatin accessibility. Maximal chromatin opening was observed after 24 h, while after 48 h most sites closed again. The chromatin-organizing protein CTCF bound to 14% of the 1,25(OH)2D3-sensitive chromatin regions. Interestingly, 1,25(OH)2D3 affected the chromatin association of CTCF providing an additional mechanism for the epigenome-wide effects of the VDR ligand. The 1,25(OH)2D3-modulated transcriptome of THP-1 cells comprised 1284 genes, 77.5% of which responded only 24 h after stimulation. During the 1,25(OH)2D3 stimulation time course the proportion of down-regulated genes increased from 0% to 44.9% and the top-ranking physiological function of the respective genes shifted from anti-microbial response to connective tissue disorders. The integration of epigenomic and transcriptomic data identified 165 physiologically important 1,25(OH)2D3 target genes, including HTT and NOD2, whose expression can be predicted primarily from epigenomic data of their genomic loci. Taken together, a large number of 1,25(OH)2D3-triggered epigenome-wide events precede and accompany the transcriptional activation of target genes of the nuclear hormone.
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Affiliation(s)
- Sabine Seuter
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
| | - Antonio Neme
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
| | - Carsten Carlberg
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FI-70211 Kuopio, Finland
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10
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Craig TA, Zhang Y, Magis AT, Funk CC, Price ND, Ekker SC, Kumar R. Detection of 1α,25-dihydroxyvitamin D-regulated miRNAs in zebrafish by whole transcriptome sequencing. Zebrafish 2014; 11:207-18. [PMID: 24650217 DOI: 10.1089/zeb.2013.0899] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The sterol hormone, 1α,25-dihydroxyvitamin D₃ (1α,25(OH)₂D₃), regulates gene expression and messenger RNA (mRNA) concentrations in zebrafish in vivo. Since mRNA concentrations and translation are influenced by micro-RNAs (miRNAs), we examined the influence of 1α,25(OH)₂D₃ on miRNA expression in zebrafish in vivo with whole transcriptome RNA sequencing, searched for miRNA binding sites in 1α,25(OH)₂D₃-sensitive genes, and performed correlation analyses between 1α,25(OH)₂D₃-sensitive miRNAs and mRNAs. In vehicle- and 1α,25(OH)₂D₃-treated, 7-day postfertilization larvae, between 282 and 295 known precursor miRNAs were expressed, and in vehicle- and 1α,25(OH)₂D₃-treated fish, between 83 and 122 novel miRNAs were detected. Following 1α,25(OH)₂D₃ treatment, 31 precursor miRNAs were differentially expressed (p<0.05). The differentially expressed miRNAs are predicted to potentially alter mRNAs for metabolic enzymes, transcription factors, growth factors, and Jak-STAT signaling. We verified the role of a 1α,25(OH)₂D₃-sensitive miRNA, miR125b, by demonstrating alterations in the concentrations of the mRNA of a 1α,25(OH)₂D₃-regulated gene, Cyp24a1, following transfection of renal cells with a miR125b miRNA mimic. Changes in the Cyp24a1 mRNA concentration by the miR125b miRNA mimic were associated with changes in the protein for Cyp24a1. Our data show that 1α,25(OH)₂D₃ regulates miRNA in zebrafish larvae in vivo and could thereby influence vitamin D-sensitive mRNA concentrations.
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Affiliation(s)
- Theodore A Craig
- 1 Nephrology and Hypertension Research, Department of Internal Medicine, Mayo Clinic , Rochester, Minnesota
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Larriba MJ, González-Sancho JM, Bonilla F, Muñoz A. Interaction of vitamin D with membrane-based signaling pathways. Front Physiol 2014; 5:60. [PMID: 24600406 PMCID: PMC3927071 DOI: 10.3389/fphys.2014.00060] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 01/30/2014] [Indexed: 12/28/2022] Open
Abstract
Many studies in different biological systems have revealed that 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3) modulates signaling pathways triggered at the plasma membrane by agents such as Wnt, transforming growth factor (TGF)-β, epidermal growth factor (EGF), and others. In addition, 1α,25(OH)2D3 may affect gene expression by paracrine mechanisms that involve the regulation of cytokine or growth factor secretion by neighboring cells. Moreover, post-transcriptional and post-translational effects of 1α,25(OH)2D3 add to or overlap with its classical modulation of gene transcription rate. Together, these findings show that vitamin D receptor (VDR) cannot be considered only as a nuclear-acting, ligand-modulated transcription factor that binds to and controls the transcription of target genes. Instead, available data support the view that much of the complex biological activity of 1α,25(OH)2D3 resides in its capacity to interact with membrane-based signaling pathways and to modulate the expression and secretion of paracrine factors. Therefore, we propose that future research in the vitamin D field should focus on the interplay between 1α,25(OH)2D3 and agents that act at the plasma membrane, and on the analysis of intercellular communication. Global analyses such as RNA-Seq, transcriptomic arrays, and genome-wide ChIP are expected to dissect the interactions at the gene and molecular levels.
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Affiliation(s)
- María Jesús Larriba
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
| | - José Manuel González-Sancho
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
| | - Félix Bonilla
- Department of Medical Oncology, Hospital Universitario Puerta de Hierro Majadahonda Majadahonda, Spain
| | - Alberto Muñoz
- Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid Madrid, Spain
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Singh PK, Doig CL, Dhiman VK, Turner BM, Smiraglia DJ, Campbell MJ. Epigenetic distortion to VDR transcriptional regulation in prostate cancer cells. J Steroid Biochem Mol Biol 2013; 136:258-63. [PMID: 23098689 PMCID: PMC4429754 DOI: 10.1016/j.jsbmb.2012.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 09/27/2012] [Accepted: 10/01/2012] [Indexed: 12/31/2022]
Abstract
The current study aimed to examine the gene specific mechanisms by which the actions of the vitamin D receptor (VDR) are distorted in prostate cancer. Transcriptional responses toward the VDR ligand, 1α,25(OH)2D3, were examined in non-malignant prostate epithelial cells (RWPE-1) and compared to the 1α,25(OH)2D3-recalcitrant prostate cancer cells (PC-3). Time resolved transcriptional studies for two VDR target genes revealed selective attenuation and repression of VDR transcriptional responses in PC-3 cells. For example, responses in PC-3 cells revealed suppressed responsiveness of IGFBP3 and G0S2. Furthermore, Chromatin Immunoprecipitation (ChIP) assays revealed that suppressed transcriptional responses in PC-3 cells of IGFBP3 and G0S2 were associated with selective VDR-induced NCOR1 enrichment at VDR-binding regions on target-gene promoter regions. We propose that VDR inappropriately recruits co-repressors in prostate cancer cells. Subsequent direct and indirect mechanisms may induce local DNA methylation and stable transcriptional silencing. Thus a transient epigenetic process mediated by co-repressor binding, namely, the control of H3K9 acetylation, is distorted to favor a more stable epigenetic event, namely DNA methylation. This article is part of a Special Issue entitled 'Vitamin D Workshop'.
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Affiliation(s)
- Prashant K. Singh
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Craig L. Doig
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Vineet K. Dhiman
- Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Bryan M. Turner
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Dominic J. Smiraglia
- Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Moray J. Campbell
- Department of Pharmacology and Therapeutics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
- Corresponding author. Tel.: +1 7168453037; fax: +1 7168458857. (M.J. Campbell)
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13
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Seuter S, Pehkonen P, Heikkinen S, Carlberg C. The gene for the transcription factor BHLHE40/DEC1/stra13 is a dynamically regulated primary target of the vitamin D receptor. J Steroid Biochem Mol Biol 2013; 136:62-7. [PMID: 23220548 DOI: 10.1016/j.jsbmb.2012.11.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 10/04/2012] [Accepted: 11/28/2012] [Indexed: 12/27/2022]
Abstract
The basic helix-loop-helix protein BHLHE40 functions as a transcriptional repressor and is involved in the control of cellular growth, development and circadian rhythms. By the use of genome-wide data on vitamin D receptor (VDR) location, open chromatin and histone modification backed-up by gene-specific mRNA expression studies we show that the human BHLHE40 gene is dynamically up-regulated by the VDR ligand 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3) and down-regulated by the histone deactylase inhibitor trichostatin A. The VDR binding site is located 1.7kb upstream of the transcription start site of the BHLHE40 gene and the chromatin at this genomic site is significantly opened by treatment with 1α,25(OH)2D3. The stair case style fluctuations in the BHLHE40 mRNA accumulation relate to the short half-life of the gene's mRNA of 0.9h. The identification of the widely expressed BHLHE40 gene as a primary VDR target may explain secondary effects of 1α,25(OH)2D3 on BHLHE40 responding genes. This article is part of a Special Issue entitled 'Vitamin D Workshop'.
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Affiliation(s)
- Sabine Seuter
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, FIN-70210 Kuopio, Finland
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Poon AH, Mahboub B, Hamid Q. Vitamin D deficiency and severe asthma. Pharmacol Ther 2013; 140:148-55. [PMID: 23792089 DOI: 10.1016/j.pharmthera.2013.06.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Accepted: 06/06/2013] [Indexed: 01/08/2023]
Abstract
Vitamin D has received tremendous amount of attention recently due to the ever-increasing reports of association between vitamin D deficiency and a wide range of conditions, from cancer to fertility to longevity. The fascination of disease association with vitamin D deficiency comes from the relatively easy solution to overcome such a risk factor, that is, either by increase in sun exposure and/or diet supplementation. Many reviews have been written on a protective role of vitamin D in asthma and related morbidities; here, we will summarize the epidemiological evidence supporting a role of vitamin D against hallmark features of severe asthma, such as airway remodeling and asthma exacerbations. Furthermore, we discuss data from in vitro and in vivo studies which provide insights on the potential mechanisms of how vitamin D may protect against severe asthma pathogenesis and how vitamin D deficiency may lead to the development of severe asthma. Approximately 5-15% of asthmatic individuals suffer from the more severe forms of disease in spite of aggressive therapies and they are more likely to have irreversible airflow obstruction associated with airway remodeling. At present drugs commonly used to control asthma symptoms, such as corticosteroids, do not significantly reverse or reduce remodeling in the airways. Hence, if vitamin D plays a protective role against the development of severe asthma, then the most effective therapy may simply be a healthy dose of sunshine.
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Affiliation(s)
- Audrey H Poon
- Meakins-Christie Laboratories, McGill University, Canada
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15
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Role of insulin-like growth factor binding protein-3 in 1, 25-dihydroxyvitamin-d 3 -induced breast cancer cell apoptosis. Int J Cell Biol 2013; 2013:960378. [PMID: 23690781 PMCID: PMC3652201 DOI: 10.1155/2013/960378] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/16/2013] [Accepted: 02/24/2013] [Indexed: 11/24/2022] Open
Abstract
Insulin-like growth factor I (IGF-I) is implicated in breast cancer development and 1, 25-dihydroxyvitamin D3 (1, 25-D3) has been shown to attenuate prosurvival effects of IGF-I on breast cancer cells. In this study the role of IGF binding protein-3 (IGFBP-3) in 1, 25-D3-induced apoptosis was investigated using parental MCF-7 breast cancer cells and MCF-7/VDR cells, which are resistant to the growth inhibitory effects of 1, 25-D3. Treatment with 1, 25-D3 increased IGFBP-3 mRNA expression in both cell lines but increases in intracellular IGFBP-3 protein and its secretion were observed only in MCF-7. 1, 25-D3-induced apoptosis was not associated with activation of any caspase but PARP-1 cleavage was detected in parental cells. IGFBP-3 treatment alone produced cleavage of caspases 7, 8, and 9 and PARP-1 in MCF-7 cells. IGFBP-3 failed to activate caspases in MCF-7/VDR cells; however PARP-1 cleavage was detected. 1, 25-D3 treatment inhibited IGF-I/Akt survival signalling in MCF-7 but not in MCF-7/VDR cells. In contrast, IGFBP-3 treatment was effective in inhibiting IGF-I/Akt pathways in both breast cancer lines. These results suggest a role for IGFBP-3 in 1, 25-D3 apoptotic signalling and that impaired secretion of IGFBP-3 may be involved in acquired resistance to vitamin D in breast cancer.
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Abstract
The main physiological actions of the biologically most active metabolite of vitamin D, 1α,25-dihydroxyvitamin D(3) (1α,25(OH)(2)D(3)), are calcium and phosphorus uptake and transport and thereby controlling bone formation. Other emergent areas of 1α,25(OH)(2)D(3) action are in the control of immune functions, cellular growth and differentiation. All genomic actions of 1α,25(OH)(2)D(3) are mediated by the transcription factor vitamin D receptor (VDR) that has been the subject of intense study since the 1980's. Thus, vitamin D signaling primarily implies the molecular actions of the VDR. In this review, we present different perspectives on the VDR that incorporate its role as transcription factor and member of the nuclear receptor superfamily, its dynamic changes in genome-wide locations and DNA binding modes, its interaction with chromatin components and its primary protein-coding and non-protein coding target genes and finally how these aspects are united in regulatory networks. By comparing the actions of the VDR, a relatively well-understood and characterized protein, with those of other transcription factors, we aim to build a realistic positioning of vitamin D signaling in the context of other intracellular signaling systems.
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Affiliation(s)
- Carsten Carlberg
- School of Medicine, Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland.
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Seuter S, Heikkinen S, Carlberg C. Chromatin acetylation at transcription start sites and vitamin D receptor binding regions relates to effects of 1α,25-dihydroxyvitamin D3 and histone deacetylase inhibitors on gene expression. Nucleic Acids Res 2012; 41:110-24. [PMID: 23093607 PMCID: PMC3592476 DOI: 10.1093/nar/gks959] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The nuclear hormone 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3 or 1,25D) regulates its target genes via activation of the transcription factor vitamin D receptor (VDR) far more specifically than the chromatin modifier trichostatin A (TsA) via its inhibitory action on histone deacetylases. We selected the thrombomodulin gene locus with its complex pattern of five VDR binding sites and multiple histone acetylation and open chromatin regions as an example to investigate together with a number of reference genes, the primary transcriptional responses to 1α,25(OH)2D3 and TsA. Transcriptome-wide, 18.4% of all expressed genes are either up-or down-regulated already after a 90 min TsA treatment; their response pattern to 1α,25(OH)2D3 and TsA sorts them into at least six classes. TsA stimulates a far higher number of genes than 1α,25(OH)2D3 and dominates the outcome of combined treatments. However, 200 TsA target genes can be modulated by 1α,25(OH)2D3 and more than 1000 genes respond only when treated with both compounds. The genomic view on the genes suggests that the degree of acetylation at transcription start sites and VDR binding regions may determine the effect of TsA on mRNA expression and its interference with 1α,25(OH)2D3. Our findings hold true also for other HDAC inhibitors and may have implications on dual therapies using chromatin modifiers and nuclear receptor ligands.
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Affiliation(s)
| | | | - Carsten Carlberg
- *To whom correspondence should be addressed. Tel: +358 40 355 3062; Fax: +358 17 281 1510;
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Featherstone K, White MRH, Davis JRE. The prolactin gene: a paradigm of tissue-specific gene regulation with complex temporal transcription dynamics. J Neuroendocrinol 2012; 24:977-90. [PMID: 22420298 PMCID: PMC3505372 DOI: 10.1111/j.1365-2826.2012.02310.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Transcription of numerous mammalian genes is highly pulsatile, with bursts of expression occurring with variable duration and frequency. The presence of this stochastic or 'noisy' expression pattern has been relatively unexplored in tissue systems. The prolactin gene provides a model of tissue-specific gene regulation resulting in pulsatile transcription dynamics in both cell lines and endocrine tissues. In most cell culture models, prolactin transcription appears to be highly variable between cells, with differences in transcription pulse duration and frequency. This apparently stochastic transcription is constrained by a transcriptional refractory period, which may be related to cycles of chromatin remodelling. We propose that prolactin transcription dynamics result from the summation of oscillatory cellular inputs and by regulation through chromatin remodelling cycles. Observations of transcription dynamics in cells within pituitary tissue show reduced transcriptional heterogeneity and can be grouped into a small number of distinct patterns. Thus, it appears that the tissue environment is able to reduce transcriptional noise to enable coordinated tissue responses to environmental change. We review the current knowledge on the complex tissue-specific regulation of the prolactin gene in pituitary and extra-pituitary sites, highlighting differences between humans and rodent experimental animal models. Within this context, we describe the transcription dynamics of prolactin gene expression and how this may relate to specific processes occurring within the cell.
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Affiliation(s)
- K Featherstone
- Developmental Biomedicine Research Group, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK.
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Ethier SD, Miura H, Dostie J. Discovering genome regulation with 3C and 3C-related technologies. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2012; 1819:401-10. [DOI: 10.1016/j.bbagrm.2011.12.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/05/2011] [Accepted: 12/06/2011] [Indexed: 10/14/2022]
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Cortés-Sempere M, de Miguel MP, Pernía O, Rodriguez C, de Castro Carpeño J, Nistal M, Conde E, López-Ríos F, Belda-Iniesta C, Perona R, Ibanez de Caceres I. IGFBP-3 methylation-derived deficiency mediates the resistance to cisplatin through the activation of the IGFIR/Akt pathway in non-small cell lung cancer. Oncogene 2012; 32:1274-83. [PMID: 22543588 DOI: 10.1038/onc.2012.146] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Although many cancers initially respond to cisplatin (CDDP)-based chemotherapy, resistance frequently develops. Insulin-like growth factor-binding protein-3 (IGFBP-3) silencing by promoter methylation is involved in the CDDP-acquired resistance process in non-small cell lung cancer (NSCLC) patients. Our purpose is to design a translational-based profile to predict resistance in NSCLC by studying the role of IGFBP-3 in the phosphatidyl inositol 3-kinase (PI3K) signaling pathway. We have first examined the relationship between IGFBP-3 expression regulated by promoter methylation and activation of the epidermal growth factor receptor (EGFR), insulin-like growth factor-I receptor (IGFIR) and PI3K/AKT pathways in 10 human cancer cell lines and 25 NSCLC patients with known IGFBP-3 methylation status and response to CDDP. Then, to provide a helpful tool that enables clinicians to identify patients with a potential response to CDDP, we have calculated the association between our diagnostic test and the true outcome of analyzed samples in terms of cisplatin IC50; the inhibitory concentration that kills 50% of the cell population. Our results suggest that loss of IGFBP-3 expression by promoter methylation in tumor cells treated with CDDP may activate the PI3K/AKT pathway through the specific derepression of IGFIR signaling, inducing resistance to CDDP. This study also provides a predictive test for clinical practice with an accuracy and precision of 0.84 and 0.9, respectively, (P=0.0062). We present a biomarker test that could provide clinicians with a robust tool with which to decide on the use of CDDP, improving patient clinical outcomes.
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Affiliation(s)
- M Cortés-Sempere
- Instituto de Investigaciones Biomedicas CSIC/UAM, CIBER de Enfermedades Raras CIBERER, Madrid, Spain
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Carlberg C. The impact of transcriptional cycling on gene regulation. Transcription 2012; 1:13-6. [PMID: 21327162 DOI: 10.4161/trns.1.1.11984] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 03/31/2010] [Accepted: 04/06/2010] [Indexed: 11/19/2022] Open
Abstract
Research of the past decade showed that transcriptional regulation could be a highly dynamic and cyclical process. Many transcription factors and their co-regulators cyclically associate with a periodicity of 30-75 min with regulatory chromatin regions resulting in dynamically changing chromatin marks and cyclical activities of RNA polymerase II in mRNA synthesis.
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Gynther P, Toropainen S, Matilainen JM, Seuter S, Carlberg C, Väisänen S. Mechanism of 1α,25-dihydroxyvitamin D(3)-dependent repression of interleukin-12B. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2011; 1813:810-8. [PMID: 21310195 DOI: 10.1016/j.bbamcr.2011.01.037] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 01/18/2011] [Accepted: 01/31/2011] [Indexed: 12/21/2022]
Abstract
Interleukin 12 (IL-12) is a heterodimeric, pro-inflammatory cytokine that plays a central role in activation and differentiation of CD4(+) T cells into interferon-γ secreting T-helper type 1 cells. IL-12B, a gene encoding the larger subunit of active IL-12, has been reported to be down-regulated by the nuclear hormone 1α,25-dihydroxyvitamin D(3) (1α,25(OH)(2)D(3)), but the mechanism of the regulation is unknown. In this study, we have examined the molecular mechanism of transcriptional regulation of the IL-12B gene by 1α,25(OH)(2)D(3) in lipopolysaccharide (LPS)-treated human monocytes (THP-1). Quantitative RT-PCR showed that IL-12B mRNA displays a cyclical expression profile and is down-regulated 2.8-fold during the first 8h and even 12.1-fold 24h after exposure to 1α,25(OH)(2)D(3). Gel shift and quantitative chromatin immunoprecipitation (ChIP) assays demonstrated vitamin D receptor (VDR) binding to genomic regions 480 and 6300bp upstream of the IL-12B transcription start site (TSS). Quantitative ChIP assays also revealed that together with VDR and its partner RXR the above regions recruited the co-repressor NCOR2/SMRT and histone deacetylase 3 leading to a decreased histone 4 acetylation and increased histone 3 trimethylation at the IL-12B promoter and its TSS. We suggest that these repressive epigenetic changes eventually cause down-regulation of IL-12 expression. This article is part of a Special Issue entitled: 11th European Symposium on Calcium.
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Affiliation(s)
- Petra Gynther
- Department of Biosciences, University of Eastern Finland, FI-70211 Kuopio, Finland
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