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Liu Z, Shriner D, Hansen NF, Rotimi CN, Mullikin JC. Admixture mapping identifies genetic regions associated with blood pressure phenotypes in African Americans. PLoS One 2020; 15:e0232048. [PMID: 32315356 PMCID: PMC7173845 DOI: 10.1371/journal.pone.0232048] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 04/06/2020] [Indexed: 01/11/2023] Open
Abstract
Hypertension occurs at a higher rate in African Americans than in European Americans. Based on the assumption that causal variants are more frequently found on DNA segments inherited from the ancestral population with higher disease risk, we employed admixture mapping to identify genetic loci with excess local African ancestry associated with blood pressure. Chromosomal regions 1q21.2–21.3, 4p15.1, 19q12 and 20p13 were significantly associated with diastolic blood pressure (β = 5.28, -7.94, -6.82 and 5.89, P-value = 6.39E-04, 2.07E-04, 6.56E-05 and 5.04E-04, respectively); 1q21.2–21.3 and 19q12 were also significantly associated with mean arterial pressure (β = 5.86 and -6.40, P-value = 5.32E-04 and 6.37E-04, respectively). We further selected SNPs that had large allele frequency differences within these regions and tested their association with blood pressure. SNP rs4815428 was significantly associated with diastolic blood pressure after Bonferroni correction (β = -2.42, P-value = 9.57E-04), and it partially explained the admixture mapping signal at 20p13. SNPs rs771205 (β = -1.99, P-value = 3.37E-03), rs3126067, rs2184953 and rs58001094 (the latter three exhibit strong linkage disequilibrium, β = -2.3, P-value = 1.4E-03) were identified to be significantly associated with mean arterial pressure, and together they fully explained the admixture signal at 1q21.2–21.3. Although no SNP at 4p15.1 showed large ancestral allele frequency differences in our dataset, we detected association at low-frequency African-specific variants that mapped predominantly to the gene PCDH7, which is most highly expressed in aorta. Our results suggest that these regions may harbor genetic variants that contribute to the different prevalence of hypertension.
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Affiliation(s)
- Zhi Liu
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Daniel Shriner
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Nancy F. Hansen
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Charles N. Rotimi
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - James C. Mullikin
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- NIH Intramural Sequencing Center, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
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Abstract
The autonomic nervous system exerts broad control over the involuntary functions of the human body through complex equilibrium between sympathetic and parasympathetic tone. Imbalance in this equilibrium is associated with a multitude of cardiovascular outcomes, including mortality. The cardiovascular static state of this equilibrium can be quantified using physiological parameters such as heart rate (HR), blood pressure, and by spectral analysis of HR variability. Here, we review the current state of knowledge of the genetic background of cardiovascular measurements of autonomic tone. For most parameters of autonomic tone, a large portion of variability is explained by genetic heritability. Many of the static parameters of autonomic tone have also been studied through candidate-gene approach, yielding some insight into how genotypes of adrenergic receptors affect variables such as HR. Genome-wide approaches in large cohorts similarly exist for static variables such as HR and blood pressure but less is known about the genetic background of the dynamic and more specific measurements, such as HR variability. Furthermore, because most autonomic measures are likely polygenic, pathway analyses and modeling of polygenic effects are critical. Future work will hopefully explain the control of autonomic tone and guide individualized therapeutic interventions.
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Miyamoto Y, Whiley PAF, Goh HY, Wong C, Higgins G, Tachibana T, McMenamin PG, Mayne L, Loveland KL. The STK35 locus contributes to normal gametogenesis and encodes a lncRNA responsive to oxidative stress. Biol Open 2018; 7:bio.032631. [PMID: 29970477 PMCID: PMC6124569 DOI: 10.1242/bio.032631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Serine/threonine kinase 35 (STK35) is a recently identified human kinase with an autophosphorylation function, linked functionally to actin stress fibers, cell cycle progression and survival. STK35 has previously been shown to be highly expressed in human testis, and we demonstrated its regulation by nuclear-localized importin α2 in HeLa cells. The present study identifies progressive expression from the STK35 locus of two coding mRNA isoforms and one long non-coding RNA (lncRNA) in mouse testis during spermatogenesis, indicating their tightly controlled synthesis. Additionally, lncRNA transcripts are increased by exposure to oxidative stress in mouse GC-1 germ cell line. STK35 knockout (KO) mice lacking all three RNAs are born at sub-Mendelian frequency, and adults manifest both male and female germline deficiency. KO males exhibit no or partial spermatogenesis in most testis tubule cross-sections; KO ovaries are smaller and contain fewer follicles. Eyes of KO mice display phenotypes ranging from gross deformity to mild goniodysgenesis or iridocorneal angle malformation, to overtly normal. These findings demonstrate the tight regulation of transcription from the STK35 locus and its central importance to fertility, eye development and cell responses to oxidative stress. Summary: Transcripts from the STK35 locus impact on male and female fertility and on eye development. A lncRNA (Stk35os1) transcript from this locus is upregulated by oxidative stress.
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Affiliation(s)
- Yoichi Miyamoto
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia .,Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saito-Asagi, Ibaraki, Osaka 567-0085, Japan
| | - Penny A F Whiley
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia.,Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright Street, Clayton, VIC 3168, Australia
| | - Hoey Y Goh
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Chin Wong
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Gavin Higgins
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Taro Tachibana
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka 558-8585, Japan
| | - Paul G McMenamin
- Department of Anatomy and Developmental Biology, School of Biological Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia
| | - Lynne Mayne
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Kate L Loveland
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright Street, Clayton, VIC 3168, Australia .,Department of Anatomy and Developmental Biology, School of Biological Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia.,Department of Molecular and Translational Sciences, School of Clinical Sciences, Monash Medical Centre, 246 Clayton Road, Clayton, VIC 3168, Australia
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Adefurin A, Ghimire LV, Kohli U, Muszkat M, Sofowora GG, Li C, Levinson RT, Paranjape SY, Stein CM, Kurnik D. Genetic variation in the alpha 1B-adrenergic receptor and vascular response. THE PHARMACOGENOMICS JOURNAL 2017; 17:366-371. [PMID: 27089938 PMCID: PMC5071105 DOI: 10.1038/tpj.2016.29] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 02/04/2016] [Accepted: 02/26/2016] [Indexed: 12/26/2022]
Abstract
The alpha1B (α1B)-adrenergic receptors contribute to vasoconstriction in humans. We tested the hypothesis that variation in the ADRA1B gene contributes to interindividual variability and ethnic differences in adrenergic vasoconstriction. We measured dorsal hand vein responses to increasing doses of phenylephrine in 64 Caucasians and 41 African Americans and genotyped 34 ADRA1B variants. We validated findings in another model of catecholamine-induced vasoconstriction, the increase in mean arterial pressure (ΔMAP) during a cold pressor test (CPT). One ADRA1B variant, rs10070745, present in 14 African-American heterozygotes but not in Caucasians, was associated with a lower phenylephrine ED50 (geometric mean (95% confidence interval), 144 (69-299) ng ml-1) compared with 27 African-American non-carriers (208 (130-334) ng ml-1; P=0.015) and contributed to the ethnic differences in ED50. The same variant was also associated with a greater ΔMAP during CPT (P=0.008). In conclusion, ADRA1B rs10070745 was significantly associated with vasoconstrictor responses after adrenergic stimulation and contributed to the ethnic difference in phenylephrine sensitivity.
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Affiliation(s)
- Abiodun Adefurin
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Laxmi V. Ghimire
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Utkarsh Kohli
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Mordechai Muszkat
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Gbenga G. Sofowora
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Chun Li
- Department of Biostatistics, Center for Human Genetics Research, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Rebecca T. Levinson
- Vanderbilt Genetics Institute, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Sachin Y. Paranjape
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - C. Michael Stein
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Daniel Kurnik
- Departments of Medicine and Pharmacology, Division of Clinical Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Clinical Pharmacology Unit, Rambam Medical Center, Haifa, Israel; Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel
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