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Gao K, Wang J, Li L, Zhai Y, Ren Y, You H, Wang B, Wu X, Li J, Liu Z, Li X, Huang Y, Luo XP, Hu D, Ohno K, Wang C. Polymorphisms in Four Genes (KCNQ1 rs151290, KLF14 rs972283, GCKR rs780094 and MTNR1B rs10830963) and Their Correlation with Type 2 Diabetes Mellitus in Han Chinese in Henan Province, China. Int J Environ Res Public Health 2016; 13:ijerph13030260. [PMID: 26927145 PMCID: PMC4808923 DOI: 10.3390/ijerph13030260] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/24/2016] [Accepted: 02/16/2016] [Indexed: 01/02/2023]
Abstract
Genetic variants at KCNQ1 rs151290, KLF14 rs972283, GCKR rs780094 and MTNR1B rs10830963 have been associated with type 2 diabetes mellitus (T2DM), but the results are contradictory in Chinese populations. The aim of the present study was to investigate the association of these four SNPs with T2DM in a large population of Han Chinese at Henan province, China. Seven-hundred-thirty-six patients with T2DM (cases) and Seven-hundred-sixty-eight healthy glucose-tolerant controls were genotyped for KCNQ1 rs151290, KLF14 rs972283, GCKR rs780094 and MTNR1B rs10830963. The association of genetic variants in these four genes with T2DM was analyzed using multivariate logistic regression. Genotypes and allele distributions of KCNQ1 rs151290 were significantly different between the cases and controls (p < 0.05). The AC and CC genotypes and the combined AC + CC genotype of rs151290 in KCNQ1 were associated with increases risk of T2DM before (OR = 1.482, 95% CI = 1.062–2.069; p = 0.021; OR = 1.544, 95% CI = 1.097–2.172, p = 0.013; and OR = 1.509, 95% CI = 1.097–2.077, p = 0.011, respectively) and after (OR = 1.539, 95% CI = 1.015–2.332, p = 0.042; OR = 1.641, 95% CI = 1.070–2.516, p = 0.023; and OR = 1.582, 95% CI = 1.061–2.358, p = 0.024; respectively) adjustment for sex, age, anthropometric measurements, biochemical indexes, smoking and alcohol consumption. Consistent with results of genotype analysis, the C allele of rs151290 in KCNQ1 was also associated with increased risk of T2DM (OR = 1.166, 95% CI = 1.004–1.355, p = 0.045). No associations between genetic variants of KLF14 rs972283, GCKR rs780094 or MTNR1B rs10830963 and T2DM were detected. The AC and CC genotypes and the C allele of rs151290 in KCNQ1 may be risk factors for T2DM in Han Chinese in Henan province.
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Affiliation(s)
- Kaiping Gao
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Jinjin Wang
- Department of Traditional Chinese Medicine Prevention, Preventive Medicine Research Evaluation Center, Henan University of Traditional Chinese Medicine, Zhengzhou 450001, China.
| | - Linlin Li
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Yujia Zhai
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Yongcheng Ren
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Haifei You
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Bingyuan Wang
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
| | - Xuli Wu
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Jianna Li
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Zichen Liu
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Xiong Li
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Yaxin Huang
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Xin-Ping Luo
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Dongsheng Hu
- Department of Preventive Medicine, School of Medicine, Shenzhen University, Shenzhen 518060, China.
| | - Kinji Ohno
- Division of Neurogenetics, Center for Neurological Diseases and Cancer, University Graduate School of Medicine, Nagoya 4668550, Japan.
| | - Chongjian Wang
- Department of Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou 450001, China.
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Dong LL, Liu AG, Wang JY, Ma CB, Zhu TT, Yan XK. [Effect of acupuncture of Ho (ST 36)-plus Mu (CV 12)-acupoints on hypothalamic gonadotropin-releasing hormone mRNA and SP mRNA expression in stress-induced gastric ulcer rats]. Zhen Ci Yan Jiu 2013; 38:291-296. [PMID: 24261299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To observe the effect of acupuncture of "Zusanli" [ST 36, Ho (Sea)-acupoint] and "Zhongwan" (CV 12, front Mu-acupoint) on the expression of hypothalamic gonadotropin-releasing hormone (GnRH) mRNA and SP mRNA in stress-induced gastric ulcer (GU) rats. METHODS Sixty male Wistar rats were randomly divided into normal control group, simple bundling group, GU model group, CV 12 group, ST 36 group and CV 12 + ST 36 (Ho- and front Mu-acupoint combination) group, with 10 cases in each group. GU model was established by binding the rat's four limbs to an animal board and to immerse it to cool water for 24 h. Manual acupuncture stimulation was applied to CV 12, bilateral ST 36 or CV 12 + ST 36 for 20 min, once daily for 2 days. The GU index was evaluated by using Guth's method (1979). GnRH mRNA and SP mRNA expression of the hypothalamus tissue was detected by reverse transcription-polymerase chain reaction (RT-PCR). RESULTS Compared with the normal group, the GU index values in the simple bundling group and the model group were significantly higher (P < 0.01); while in comparison with the model group, the GU index values were significantly decreased in the CV 12, ST 36 and CV 12 + ST 36 groups (P < 0.05, P < 0.01). Following stress stimulation, hypothalamic GnRH mRNA expression levels in the simple bundling group and the model group were remarkably increased (P < 0.05, P < 0.01), whereas those of hypothalamic SP mRNA expression had no apparent changes in these two groups (P > 0.05). After manual acupuncture intervention, hypothalamic GnRH mRNA expression levels in the CV 12, ST 36 and CV 12 + ST 36 groups were evidently down-regulated and SP mRNA expression levels in the ST 36 and CV 12+ ST 36 groups were remarkably upregulated in comparison with the model group (P < 0.01). No significant differences were found between the CV 12 and ST 36 groups in the GU index, among the CV 12, ST 36 and CV 12 + ST 36 groups in GnRH mRNA expression, and between the CV 12 and model groups in the expression levels of SP mRNA (P > 0.05). CONCLUSION Acupuncture of CV 12 and ST 36 can relieve stress-induced gastric ulcer in the rat, which is closely with its effect in down-regulating hypothalamic GnRH mRNA expression.
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Affiliation(s)
- Li-Li Dong
- Department of Acumoxibustion, Gansu College of Chinese Medicine, Lanzhou 730000, China.
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Truty MJ, Lomberk G, Fernandez-Zapico ME, Urrutia R. Silencing of the transforming growth factor-beta (TGFbeta) receptor II by Kruppel-like factor 14 underscores the importance of a negative feedback mechanism in TGFbeta signaling. J Biol Chem 2009; 284:6291-300. [PMID: 19088080 PMCID: PMC2649086 DOI: 10.1074/jbc.m807791200] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Revised: 12/08/2008] [Indexed: 01/30/2023] Open
Abstract
The role of non-Smad proteins in the regulation of transforming growth factor-beta (TGFbeta) signaling is an emerging line of active investigation. Here, we characterize the role of KLF14, as a TGFbeta-inducible, non-Smad protein that silences the TGFbeta receptor II (TGFbetaRII) promoter. Together with endocytosis, transcriptional silencing is a critical mechanism for down-regulating TGFbeta receptors at the cell surface. However, the mechanisms underlying transcriptional repression of these receptors remain poorly understood. KLF14 has been chosen from a comprehensive screen of 24 members of the Sp/KLF family due to its TGFbeta inducibility, its ability to regulate the TGFbetaRII promoter, and the fact that this protein had yet to be functionally characterized. We find that KLF14 represses the TGFbetaRII, a function that is augmented by TGFbeta treatment. Mapping of the TGFbetaRII promoter, in combination with site-directed mutagenesis, electromobility shift, and chromatin immunoprecipitation assays, have identified distinct GC-rich sequences used by KLF14 to regulate this promoter. Mechanistically, KLF14 represses the TGFbetaRII promoter via a co-repressor complex containing mSin3A and HDAC2. Furthermore, the TGFbeta pathway activation leads to recruitment of a KLF14-mSin3A-HDAC2 repressor complex to the TGFbetaRII promoter, as well as the remodeling of chromatin to increase histone marks that associate with transcriptional silencing. Thus, these results describe a novel negative-feedback mechanism by which TGFbetaRII activation at the cell surface induces the expression of KLF14 to ultimately silence the TGFbetaRII and further expand the network of non-Smad transcription factors that participate in the TGFbeta pathway.
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Affiliation(s)
- Mark J Truty
- Department of Biochemistry and Molecular Biology, Gastroenterology Research Unit, Mayo Clinic, Rochester, MN 55905, USA
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Parker-Katiraee L, Carson AR, Yamada T, Arnaud P, Feil R, Abu-Amero SN, Moore GE, Kaneda M, Perry GH, Stone AC, Lee C, Meguro-Horike M, Sasaki H, Kobayashi K, Nakabayashi K, Scherer SW. Identification of the imprinted KLF14 transcription factor undergoing human-specific accelerated evolution. PLoS Genet 2007; 3:e65. [PMID: 17480121 PMCID: PMC1865561 DOI: 10.1371/journal.pgen.0030065] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2006] [Accepted: 03/12/2007] [Indexed: 12/22/2022] Open
Abstract
Imprinted genes are expressed in a parent-of-origin manner and are located in clusters throughout the genome. Aberrations in the expression of imprinted genes on human Chromosome 7 have been suggested to play a role in the etiologies of Russell-Silver Syndrome and autism. We describe the imprinting of KLF14, an intronless member of the Krüppel-like family of transcription factors located at Chromosome 7q32. We show that it has monoallelic maternal expression in all embryonic and extra-embryonic tissues studied, in both human and mouse. We examine epigenetic modifications in the KLF14 CpG island in both species and find this region to be hypomethylated. In addition, we perform chromatin immunoprecipitation and find that the murine Klf14 CpG island lacks allele-specific histone modifications. Despite the absence of these defining features, our analysis of Klf14 in offspring from DNA methyltransferase 3a conditional knockout mice reveals that the gene's expression is dependent upon a maternally methylated region. Due to the intronless nature of Klf14 and its homology to Klf16, we suggest that the gene is an ancient retrotransposed copy of Klf16. By sequence analysis of numerous species, we place the timing of this event after the divergence of Marsupialia, yet prior to the divergence of the Xenarthra superclade. We identify a large number of sequence variants in KLF14 and, using several measures of diversity, we determine that there is greater variability in the human lineage with a significantly increased number of nonsynonymous changes, suggesting human-specific accelerated evolution. Thus, KLF14 may be the first example of an imprinted transcript undergoing accelerated evolution in the human lineage. Imprinted genes are expressed in a parent-of-origin manner, where one of the two inherited copies of the imprinted gene is silenced. Aberrations in the expression of these genes, which generally regulate growth, are associated with various developmental disorders, emphasizing the importance of their discovery and analysis. In this study, we identify a novel imprinted gene, named KLF14, on human Chromosome 7. It is predicted to bind DNA and regulate transcription and was shown to be expressed from the maternally inherited chromosome in all human and mouse tissues examined. Surprisingly, we did not identify molecular signatures generally associated with imprinted regions, such as DNA methylation. Additionally, the identification of numerous DNA sequence variants led to an in-depth analysis of the gene's evolution. It was determined that there is greater variability in KLF14 in the human lineage, when compared to other primates, with a significantly increased number of polymorphisms encoding for changes at the protein level, suggesting human-specific accelerated evolution. As the first example of an imprinted transcript undergoing accelerated evolution in the human lineage, we propose that the accumulation of polymorphisms in KLF14 may be aided by the silencing of the inactive allele, allowing for stronger selection.
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Affiliation(s)
- Layla Parker-Katiraee
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Andrew R Carson
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Takahiro Yamada
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Philippe Arnaud
- Institute of Molecular Genetics (IGMM), CNRS UMR5535, Montpellier, France
- University of Montpellier II, Montpellier, France
| | - Robert Feil
- Institute of Molecular Genetics (IGMM), CNRS UMR5535, Montpellier, France
- University of Montpellier II, Montpellier, France
| | - Sayeda N Abu-Amero
- Institute of Child Health, University College London, London, United Kingdom
| | - Gudrun E Moore
- Institute of Child Health, University College London, London, United Kingdom
| | - Masahiro Kaneda
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Research Organization of Information and Systems, Mishima, Japan
| | - George H Perry
- School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States of America
| | - Anne C Stone
- School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States of America
| | - Charles Lee
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
| | - Makiko Meguro-Horike
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Hiroyuki Sasaki
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Research Organization of Information and Systems, Mishima, Japan
- Department of Genetics, School of Life Science, The Graduate University for Advanced Studies (Sokendai), Mishima, Japan
| | - Keiko Kobayashi
- Department of Molecular Metabolism and Biochemical Genetics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kazuhiko Nakabayashi
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Division of Human Genetics, Department of Integrated Genetics, National Institute of Genetics, Research Organization of Information and Systems, Mishima, Japan
| | - Stephen W Scherer
- Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario, Canada
- * To whom correspondence should be addressed. E-mail:
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Scohy S, Gabant P, Van Reeth T, Hertveldt V, Drèze PL, Van Vooren P, Rivière M, Szpirer J, Szpirer C. Identification of KLF13 and KLF14 (SP6), novel members of the SP/XKLF transcription factor family. Genomics 2000; 70:93-101. [PMID: 11087666 DOI: 10.1006/geno.2000.6362] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Using the sequence of the SP1 zinc-finger DNA-binding domain as a probe to screen a mouse EST database, we identified two novel members of the SP/XKLF transcription factor family, KLF13 and KLF14. The mouse Klf13 cDNA (1310 bp in length) contains a single open reading frame of 288 amino acids with a DNA-binding domain closely related to that of the human RFLAT-1 protein and a putative transactivator N-terminal domain rich in proline and alanine residues. The mouse Klf13 gene seems to be the homologue of the human RFLAT1 gene. The mouse Klf14 sequence is homologous to a human genomic sequence from chromosome 17 that is believed to code for a protein with three zinc fingers at the end of its C-terminal domain. Using reverse transcription-polymerase chain reaction, we showed ubiquitous expression of Klf13 and Klf14 in adult mice. A third member of this family was also identified in a human EST database; this sequence was found to be identical to KLF11 (TIEG2), recently identified by Cook et al. (1998, J. Biol. Chem. 273: 25929-25936). The corresponding mouse cDNA was isolated and sequenced. The three genes were localized in the human and the rat: chromosomes 15 (human KLF13), 17q21.3-q22 (human KLF14; HGMW-approved symbol SP6), and 2p25 (human KLF11) and chromosomes 1q31-q32 (rat Klf13), 10q31-q32.1 (rat Klf14) (SP6), and 6q16-q21 (rat Klf11).
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Affiliation(s)
- S Scohy
- Université Libre de Bruxelles, IBMM, Rue Professeurs Jeener & Brachet, 12, Gosselies, B-6041, Belgium
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