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Zhang LN, Lu AX, Lin Y, Li J, Xu X, Yan CH, Zhang L. Association between systemic inflammation markers and blood pressure among children and adolescents: National Health and Nutrition Examination Survey. Pediatr Res 2024:10.1038/s41390-024-03472-1. [PMID: 39154142 DOI: 10.1038/s41390-024-03472-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 06/13/2024] [Accepted: 07/13/2024] [Indexed: 08/19/2024]
Abstract
BACKGROUND Few studies have estimated the associations of systemic inflammation markers and high blood pressure (HBP) in the pediatric population. METHODS Basing on data from the National Health and Nutrition Examination Survey (NHANES) from 1999 to 2018, we assessed the associations between four inflammation-related factors based on blood cell counts: systemic immune inflammation index (SII), neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), lymphocyte-to-monocyte ratio (LMR), and risk for pediatric HBP by estimating odds ratios (ORs) using multivariable logistic regression models. RESULTS A total of 17,936 children aged 8-19 years were included in the analysis, representing about 36.7 million American children. The prevalence rates of elevated blood pressure (EBP) and hypertension (HTN) were 15.79% and 6.77%, respectively. The results showed that the ORs for EBP per standard deviation (SD) increment in SII and NLR were estimated at 1.11 [95% confidence interval (95%CI): 1.04, 1.17] and 1.08 (95%CI: 1.02, 1.15), respectively; and the OR for EBP per SD increment in LMP were estimated at 0.90 (95%CI: 0.83, 0.96). These associations were stronger in boys and younger children. CONCLUSIONS The study suggested that inflammation-related factors could serve as easily accessible early biomarkers for HBP risk prediction and prevention in children and adolescents. IMPACT The study suggested that inflammation-related factors could serve as easily accessible early biomarkers for HBP risk prediction and prevention in children and adolescents. This is the first study that demonstrates the close association between systemic inflammation markers and HBP in children and adolescents using nationally representative population data. The findings have more public health implications and support that systemic inflammation markers based on blood cell counts could serve as easily accessible biomarkers of HBP risk and prevention in earlier identification of the diseases.
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Affiliation(s)
- Li-Na Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - An-Xin Lu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Yin Lin
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Jing Li
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xi Xu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Chong-Huai Yan
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
| | - Lin Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
- Department of Labor Health and Environmental Hygiene, School of Public Health, Lanzhou University, Lanzhou, 730000, China.
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Zhong J, Wang D, Xie S, Li M, Yin Y, Yu J, Ma C, Yu S, Qiu L. Pre-analytical stability and physiological fluctuations affect plasma steroid hormone outcomes: A real-world study. J Steroid Biochem Mol Biol 2024; 244:106596. [PMID: 39089343 DOI: 10.1016/j.jsbmb.2024.106596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/29/2024] [Accepted: 07/30/2024] [Indexed: 08/03/2024]
Abstract
Since steroids are crucial for diagnosing endocrine disorders, the lack of research on factors that affect hormone levels makes interpreting the results difficult. Our study aims to assess the stability of the pre-analytical procedure and the impact of hormonal physiological fluctuations using real-world data. The datasets were created using 12,418 records from individuals whose steroid hormone measurements were taken in our laboratory between September 2019 and March 2024. 22 steroid hormones in plasma by a well-validated liquid chromatography tandem mass spectrometry method were measured. After normalization transformation, outlier removal, and z-score normalization, generalized additive models were constructed to evaluate preanalytic stability and age, sex, and sample time-dependent hormonal fluctuations. Most hormones exhibit significant variability with age, particularly steroid hormone precursors, sex hormones, and certain corticosteroids such as aldosterone. 18-hydroxycortisol, 18-oxocortisol. Sex hormones varied between males and females. Levels of certain hormones, including cortisol, cortisone, 11-deoxycortisol, 18-hydroxycortisol, 18-oxocortisol, corticosterone, aldosterone, estrone, testosterone, dihydrotestosterone, dehydroepiandrosterone sulfate, 11-ketotestosterone, and 11-hydroxytestosterone, fluctuated with sampling time. Moreover, levels of pregnenolone and progesterone decreased within 1 hour of sampling, with pregnenolone becoming unstable with storage time at 4 degrees after centrifugation, while other hormone levels remained relatively stable for a short period of time without or after centrifugation of the sample. This is the first instance real-world data has been used to assess the pre-analytic stability of plasma hormones and to evaluate the impact of physiological factors on steroid hormones.
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Affiliation(s)
- Jian Zhong
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Danchen Wang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Shaowei Xie
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Ming Li
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yicong Yin
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jialei Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Chaochao Ma
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - SongLin Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Ling Qiu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
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Wang WT, Wu TH, Er LK, Huang CW, Tu KH, Fan KC, Tsai CH, Wang SY, Wu CY, Huang SH, Liu HW, Tseng FY, Wu WC, Chang CC, Cheng HM, Lin LY, Chueh JS, Lin YH, Hwu CM, Wu VC. Recent progress in unraveling cardiovascular complications associated with primary aldosteronism: a succinct review. Hypertens Res 2024; 47:1103-1119. [PMID: 38228750 DOI: 10.1038/s41440-023-01538-x] [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] [Received: 09/02/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 01/18/2024]
Abstract
This comprehensive review offers a thorough exploration of recent advancements in our understanding of the intricate cardiovascular complications associated with Primary Aldosteronism (PA). PA encompasses a spectrum of conditions characterized by hypertension and excessive production of aldosterone operating independently of the renin-angiotensin system. Given its association with an elevated risk of cardiovascular and cerebrovascular complications, as well as a higher incidence of metabolic syndrome in comparison to individuals with essential hypertension (EH), an accurate diagnosis of PA is of paramount importance. This review delves into the intricate interplay between PA and cardiovascular health and focuses on the key pathophysiological mechanisms contributing to adverse cardiac outcomes. The impact of different treatment modalities on cardiovascular health is also examined, offering insights into potential therapeutic approaches. By highlighting the significance of recognizing PA as a significant contributor to cardiovascular morbidity, this review emphasizes the need for improved screening, early diagnosis, and tailored management strategies to both enhance patient care and mitigate the burden of cardiovascular diseases. The findings presented herein underscore the growing importance of PA in the context of cardiovascular medicine and emphasize the potential for translating these insights into targeted interventions to improve patient outcomes.
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Affiliation(s)
- Wei-Ting Wang
- Division of Cardiology, Department of Internal Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
| | - Tsung-Hui Wu
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
- Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Leay-Kiaw Er
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taipei Tzu Chi Hospital, The Buddhist Medical Foundation, Hualien, Taiwan, ROC
- School of Medicine, Tzu-Chi University College of Medicine, Hualien, Taiwan, ROC
| | - Chien-Wei Huang
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
- Division of Nephrology, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, ROC
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
| | - Kun-Hua Tu
- Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan, ROC
| | - Kang-Chih Fan
- Division of Endocrinology and Metabolism, Department of Internal Medicine, National Taiwan University Hospital Hsinchu Branch, Hsinchu, Taiwan, ROC
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan, ROC
| | - Cheng-Hsuan Tsai
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan, ROC
| | - Shu-Yi Wang
- Division of Endocrinology & Metabolism, Department of Internal Medicine, Changhua Christian Hospital, Changhua, Taiwan, ROC
| | - Chun-Yi Wu
- Division of Nephrology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan, ROC
| | - Shu-Heng Huang
- Division of Endocrinology & Metabolism, Department of Internal Medicine, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung, Taiwan, ROC
| | - Han-Wen Liu
- Division of Endocrinology & Metabolism, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan, ROC
| | - Fen-Yu Tseng
- Division of Endocrinology & Metabolism, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan, ROC
| | - Wan-Chen Wu
- Division of Endocrinology & Metabolism, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan, ROC
| | - Chin-Chen Chang
- Department of Medical Imaging, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan, ROC
- Department and Graduate Institute of Forensic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan, ROC
| | - Hao-Min Cheng
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC.
| | - Liang-Yu Lin
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
- Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Jeff S Chueh
- Primary Aldosteronism Center, National Taiwan University Hospital, (NTUH-PAC), Taipei, Taiwan, ROC
- TAIPAI, Taiwan Primary Aldosteronism Investigation (TAIPAI) Study Group, Taipei, Taiwan, ROC
- Department of Urology, National Taiwan University Hospital, Taipei, Taiwan, ROC
| | - Yen-Hung Lin
- Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, National Taiwan University Hospital, Taipei, Taiwan, ROC
- Primary Aldosteronism Center, National Taiwan University Hospital, (NTUH-PAC), Taipei, Taiwan, ROC
- TAIPAI, Taiwan Primary Aldosteronism Investigation (TAIPAI) Study Group, Taipei, Taiwan, ROC
| | - Chii-Min Hwu
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC.
- Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
| | - Vin-Cent Wu
- Division of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
- School of Medicine, Tzu-Chi University College of Medicine, Hualien, Taiwan, ROC.
- Primary Aldosteronism Center, National Taiwan University Hospital, (NTUH-PAC), Taipei, Taiwan, ROC.
- TAIPAI, Taiwan Primary Aldosteronism Investigation (TAIPAI) Study Group, Taipei, Taiwan, ROC.
- Division of Nephrology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan, ROC.
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Aljaibeji H, Heydarpour M, Stanton AM, Williams JS, Pojoga LH, Romero JR, Williams GH. Role of Raptor Gene Variants in Hypertension: Influence on Blood Pressure Independent of Salt Intake in White Population. Hypertension 2024; 81:1167-1177. [PMID: 38497230 PMCID: PMC11023780 DOI: 10.1161/hypertensionaha.123.22273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/29/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND The mTOR (mechanistic target of rapamycin) is an essential regulator of fundamental biological processes. mTOR forms 2 distinct complexes, mTORC1 (mTOR complex 1) when it binds with RAPTOR (Regulatory-associated Protein of mTOR) and mTORC2 (mTOR complex 2) when it associates with RICTOR (Rapamycin-insesitive companion of mTOR). Due to the previous link between the mTOR pathway, aldosterone, and blood pressure (BP), we anticipated that variants in the mTOR complex might be associated with salt-sensitive BP. METHODS BP and other parameters were assessed after a one-week liberal Na+ (200 mmol/d) and a one-week restricted Na+ (10 mmol/d) diet in 608 White subjects from the Hypertensive Pathotype cohort, single-nucleotide variants in MTOR, RPTOR, and RICTOR genes were obtained for candidate genes analyses. RESULTS The analysis revealed a significant association between a single nucleotide variants within the RPTOR gene and BP. Individuals carrying the RPTOR rs9901846 homozygous risk allele (AA) and heterozygous risk allele (GA) exhibited a 5 mm Hg increase in systolic BP on a liberal diet compared with nonrisk allele individuals (GG), but only in women. This single nucleotide variants effect was more pronounced on the restricted diet and present in both sexes, with AA carriers having a 9 mm Hg increase and GA carriers having a 5 mm Hg increase in systolic BP compared with GG. Interestingly, there were no significant associations between MTOR or RICTOR gene variants and BP. CONCLUSIONS The RPTOR gene variation is associated with elevated BP in White participants, regardless of salt intake, specifically in females.
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Affiliation(s)
- Hayat Aljaibeji
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Mahyar Heydarpour
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Ana Maria Stanton
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Jonathan S Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Luminita H Pojoga
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Jose R Romero
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
| | - Gordon H Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, MA (H.A., M.H., A.M.S., J.S.W., L.H.P., J.R.R., G.H.W.)
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5
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Buncha V, Cherezova A, Alexander S, Baranovskaya I, Coleman KA, Cherian-Shaw M, Brands MW, Sullivan JC, O'Connor PM, Mamenko M. Aldosterone Antagonism Is More Effective at Reducing Blood Pressure and Excessive Renal ENaC Activity in AngII-Infused Female Rats Than in Males. Hypertension 2023; 80:2196-2208. [PMID: 37593894 PMCID: PMC10528186 DOI: 10.1161/hypertensionaha.123.21287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023]
Abstract
BACKGROUND AngII (angiotensin II)-dependent hypertension causes comparable elevations of blood pressure (BP), aldosterone levels, and renal ENaC (epithelial Na+ channel) activity in male and female rodents. Mineralocorticoid receptor (MR) antagonism has a limited antihypertensive effect associated with insufficient suppression of renal ENaC in male rodents with AngII-hypertension. While MR blockade effectively reduces BP in female mice with salt-sensitive and leptin-induced hypertension, MR antagonism has not been studied in female rodents with AngII-hypertension. We hypothesize that overstimulation of renal MR signaling drives redundant ENaC-mediated Na+ reabsorption and BP increase in female rats with AngII-hypertension. METHODS We employ a combination of physiological, pharmacological, biochemical, and biophysical approaches to compare the effect of MR inhibitors on BP and ENaC activity in AngII-infused male and female Sprague Dawley rats. RESULTS MR blockade markedly attenuates AngII-hypertension in female rats but has only a marginal effect in males. Spironolactone increases urinary sodium excretion and urinary sodium-to-potassium ratio in AngII-infused female, but not male, rats. The expression of renal MR and HSD11β2 (11β-hydroxysteroid dehydrogenase type 2) that determines the availability of MR to aldosterone is significantly higher in AngII-infused female rats than in males. ENaC activity is ≈2× lower in spironolactone-treated AngII-infused female rats than in males. Reduced ENaC activity in AngII-infused female rats on spironolactone correlates with increased interaction with ubiquitin ligase Nedd4-2 (neural precursor cell expressed developmentally down-regulated protein 4-2), targeting ENaC for degradation. CONCLUSIONS MR-ENaC axis is the primary determinant of excessive renal sodium reabsorption and an attractive antihypertensive target in female rats with AngII-hypertension, but not in males.
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Affiliation(s)
- Vadym Buncha
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Alena Cherezova
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Sati Alexander
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Irina Baranovskaya
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Kathleen A Coleman
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Mary Cherian-Shaw
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Michael W Brands
- Department of Physiology, Medical College of Georgia, Augusta University
| | | | - Paul M O'Connor
- Department of Physiology, Medical College of Georgia, Augusta University
| | - Mykola Mamenko
- Department of Physiology, Medical College of Georgia, Augusta University
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Salt sensitivity of blood pressure in childhood and adolescence. Pediatr Nephrol 2022; 37:993-1005. [PMID: 34327584 DOI: 10.1007/s00467-021-05178-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 06/07/2021] [Accepted: 06/12/2021] [Indexed: 10/20/2022]
Abstract
Although moderation of sodium intake is recommended population-wide, it remains uncertain who benefits from salt restriction. Salt sensitivity refers to changes in blood pressure in response to sodium intake and may occur with or without hypertension. Unfortunately, there is no practical way to assess salt sensitivity in daily practice. Assessment of salt sensitivity even in research studies is challenging with varying protocols utilized which may contribute to differing results. Building on studies in animals and adults, risk factors and conditions associated with salt sensitivity have been identified in the pediatric and young adult populations. This review presents the limited evidence linking obesity, low birth weight, diabetes, chronic kidney disease, and race/ethnicity with salt sensitivity in children, adolescents, and young adults. The impact of stress on sodium handling is also reviewed. The influence of age on the timing of introduction of dietary salt restriction and the long-term influence of salt sensitivity on risk for hypertension are considered. Lastly, interventions other than salt restriction that may improve salt sensitivity and may inform recommendations to families are reviewed.
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Parksook WW, Heydarpour M, Gholami SK, Luther JM, Hopkins PN, Pojoga LH, Williams JS. Salt Sensitivity of Blood Pressure and Aldosterone: Interaction Between the Lysine-specific Demethylase 1 Gene, Sex, and Age. J Clin Endocrinol Metab 2022; 107:1294-1302. [PMID: 35022775 PMCID: PMC9016472 DOI: 10.1210/clinem/dgac011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Indexed: 01/13/2023]
Abstract
CONTEXT Salt sensitivity of blood pressure (SSBP) is associated with increased cardiovascular risk, especially in individuals of African descent, although the underlying mechanisms remain obscure. Lysine-specific demethylase 1 (LSD1) is a salt-sensitive epigenetic regulator associated with SSBP and aldosterone dysfunction. An LSD1 risk allele in humans is associated with SSBP and lower aldosterone levels in hypertensive individuals of African but not European descent. Heterozygous knockout LSD1 mice display SSBP and aldosterone dysregulation, but this effect is modified by age and biological sex. This might explain differences in cardiovascular risk with aging and biological sex in humans. OBJECTIVE This work aims to determine if LSD1 risk allele (rs587618) carriers of African descent display a sex-by-age interaction with SSBP and aldosterone regulation. METHODS We analyzed 297 individuals of African and European descent from the HyperPATH cohort. We performed multiple regression analyses for outcome variables related to SSBP and aldosterone. RESULTS LSD1 risk allele carriers of African (but not European) descent had greater SSBP than nonrisk homozygotes. Female LSD1 risk allele carriers of African descent had greater SSBP, mainly relationship-driven by women with low estrogen (postmenopausal). There was a statistically significant LSD1 genotype-sex interaction in aldosterone response to angiotensin II stimulation in individuals aged 50 years or younger, with female carriers displaying decreased aldosterone responsiveness. CONCLUSION SSBP associated with LSD1 risk allele status is driven by women with a depleted estrogen state. Mechanisms related to a resistance to develop SSBP in females are uncertain but may relate to an estrogen-modulating effect on mineralocorticoid receptor (MR) activation and/or LSD1 epigenetic regulation of the MR.
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Affiliation(s)
- Wasita W Parksook
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Medicine (Division of Endocrinology and Metabolism, and Division of General Internal Medicine), Faculty of Medicine, Chulalongkorn University, and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Mahyar Heydarpour
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Shadi K Gholami
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - James M Luther
- Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center, Vanderbilt Hypertension Center, Nashville, Tennessee 37232, USA
| | - Paul N Hopkins
- Cardiovascular Genetics Research Unit, University of Utah School of Medicine, Salt Lake City, Utah 84132, USA
| | - Luminita H Pojoga
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Jonathan S Williams
- Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Correspondence: Jonathan S. Williams, MD, MMSc, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, 221 Longwood Ave, Boston, MA 02115, USA.
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Kim YG, Moon JY, Oh B, Chin HJ, Kim DK, Park JH, Shin SJ, Choi BS, Lim CS, Lee SH. Pressure-Natriuresis Response Is Diminished in Old Age. Front Cardiovasc Med 2022; 9:840840. [PMID: 35252404 PMCID: PMC8889037 DOI: 10.3389/fcvm.2022.840840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/24/2022] [Indexed: 11/13/2022] Open
Abstract
Background Age-related alterations in renal sodium handling affect blood pressure (BP). We aimed to clarify whether the pressure-natriuresis response changes with age, leading to BP elevation. Methods A total of 4,859 participants with normal renal function from the Korean Genome and Epidemiology Study (KoGES) and 235 patients with non-diabetic chronic kidney disease (CKD) from the ESPECIAL trial were included and divided into the younger and older groups. In ESPECIAL, participants took olmesartan from weeks 0 to 16 and were educated about a low-salt diet (LSD) from weeks 8 to 16. Results In both studies, older participants showed lower estimated glomerular filtration rate (eGFR) and urine concentration index and higher albuminuria. In KoGES, BP was higher and urine sodium was lower in older participants. In ESPECIAL, diastolic BP at 0 week was lower in older participants. Olmesartan reduced BP in both groups, whereas LSD decreased systolic BP only in older participants. Urine sodium increased in younger participants but decreased in older participants after olmesartan use. In KoGES, urine sodium was correlated with BP in both groups after adjusting for age, sex, and eGFR; however, the correlation coefficient was lower in older participants. In ESPECIAL, only younger participants showed a significant positive association between systolic BP and urine sodium in multiple regression analysis. Conclusions The pressure-natriuresis response was diminished in older participants with or without CKD.
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Affiliation(s)
- Yang Gyun Kim
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, South Korea
| | - Ju-Young Moon
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, South Korea
| | - Bermseok Oh
- Department of Biomedical Engineering, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Ho Jun Chin
- Division of Nephrology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Dong Ki Kim
- Division of Nephrology, Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea
| | - Jung Hwan Park
- Division of Nephrology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, South Korea
| | - Sung Joon Shin
- Division of Nephrology, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, South Korea
| | - Bum Soon Choi
- Division of Nephrology, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Chun Soo Lim
- Division of Nephrology, Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Sang Ho Lee
- Division of Nephrology, Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, South Korea
- *Correspondence: Sang Ho Lee
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Zhao D, Wu NN, Zhang YY. Eplerenone–A novel Mineralocorticoid receptor antagonist for the clinical application. ENVIRONMENTAL DISEASE 2022. [DOI: 10.4103/ed.ed_7_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Gray Z, Tu W, Chertow GM, Bhalla V. Aldosterone sensitivity: an opportunity to explore the pathogenesis of hypertension. Am J Physiol Renal Physiol 2021; 320:F325-F335. [PMID: 33491565 DOI: 10.1152/ajprenal.00415.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Aldosterone sensitivity is defined as an outcome variable for a given circulating level of aldosterone. In basic and translational studies, aldosterone sensitivity has been measured in differential tissue responses, e.g., lower urine sodium and higher urine potassium, as an index of the renal response; in clinical studies, aldosterone sensitivity has been measured in differential blood pressure responses. The concept of aldosterone sensitivity disrupts the conventional wisdom of the renin-angiotensin-aldosterone system and has the potential to uncover novel mechanisms of hypertension. Here, we review basic and translational science studies that uncovered differential renal responses to aldosterone and connect this earlier work to more recent observational studies and randomized trials that have demonstrated differential blood pressure responses for a given level of aldosterone in healthy and hypertensive persons. Black race and older age are associated with higher aldosterone sensitivity and blood pressure. We also discuss gaps in the field and how future basic and clinical studies might inform mechanisms of differential sensitivity.
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Affiliation(s)
- Zachary Gray
- Stanford Hypertension Center, Stanford University School of Medicine, Stanford, California
| | - Wanzhu Tu
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, Indiana
| | - Glenn M Chertow
- Stanford Hypertension Center, Stanford University School of Medicine, Stanford, California.,Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
| | - Vivek Bhalla
- Stanford Hypertension Center, Stanford University School of Medicine, Stanford, California.,Division of Nephrology, Department of Medicine, Stanford University School of Medicine, Stanford, California
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11
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Lattanzio MR, Weir MR. Hyperaldosteronism: How Current Concepts Are Transforming the Diagnostic and Therapeutic Paradigm. KIDNEY360 2020; 1:1148-1156. [PMID: 35368778 PMCID: PMC8815485 DOI: 10.34067/kid.0000922020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 07/16/2020] [Indexed: 06/14/2023]
Abstract
Nearly seven decades have elapsed since the clinical and biochemical features of primary hyperaldosteronism (PA) were described by Conn. PA is now widely recognized as the most common form of secondary hypertension. PA has a strong correlation with cardiovascular disease and failure to recognize and/or properly diagnose this condition has profound health consequences. With proper identification and management, PA has the potential to be surgically cured in a proportion of affected individuals. The diagnostic pursuit for PA is not a simplistic endeavor, particularly because an enhanced understanding of the disease process is continually redefining the diagnostic and treatment algorithm. These new concepts have emerged in all areas of this clinical condition, including identification, diagnosis, and treatment. Here, we review the recent advances in this field and summarize the effect these advances have on both diagnostic and therapeutic modalities.
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Affiliation(s)
- Michael R. Lattanzio
- Division of Nephrology, Department of Medicine, The Chester County Hospital/University of Pennsylvania Health System, Philadelphia, Pennsylvania
| | - Matthew R. Weir
- Division of Nephrology, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
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12
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Abstract
PURPOSE OF REVIEW Hypertension is a common finding in children, and increases the risk for future cardiovascular events. This review focuses on recent advances in pediatric hypertension research including changes in hypertension guidelines, epidemiology, predictors of hypertension, blood pressure (BP) measurement, effects on target organs, and treatment of hypertension. RECENT FINDINGS Changes in the 2017 hypertension guidelines by the American Academy of Pediatrics (AAP) have resulted in increased prevalence of elevated BP and hypertension in the United States, and there is no international consensus on these changes. Despite rising pediatric overweight and obesity in China, hypertension prevalence is stable, suggesting multifactorial effects on childhood BP. Maternal diabetes and exposure to particulate matter are associated with higher childhood BP, and body size in infancy and early childhood is a determinant of adult high BP. Children with elevated BP have evidence of target organ damage with altered retinal vasculature and pulse wave velocity parameters compared to normotensive patients. Angiotensin-converting enzyme inhibitors and angiotensin receptor blockers may be the best antihypertensive medications for the pediatric population even for African-American patients. SUMMARY Research continues to illuminate contributors to pediatric hypertension and demonstrates opportunities for further study on the effects of hypertension and its management in children.
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13
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Hannah-Shmouni F, Gubbi S, Spence JD, Stratakis CA, Koch CA. Resistant Hypertension: A Clinical Perspective. Endocrinol Metab Clin North Am 2019; 48:811-828. [PMID: 31655778 DOI: 10.1016/j.ecl.2019.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Resistant hypertension is a common clinical entity, defined as suboptimal blood pressure response to multiple therapies after excluding medication nonadherence and secondary forms of hypertension. Patients with resistant hypertension generally share several comorbidities. Resistant hypertension is more common in individuals of African descent. Blood pressure should be optimized using multiple strategies, including lifestyle changes and single-pill combination therapies, with the aim of reducing cardiovascular events while reducing side effects from using antihypertensive therapy. A renin/aldosterone-based diagnostic and treatment approach will help tailor therapy. The use of mineralocorticoid receptor antagonists or amiloride as appropriate is favored.
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Affiliation(s)
- Fady Hannah-Shmouni
- Internal Medicine-Endocrinology, Hypertension and Metabolic Genetics, Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 10 Center Drive, MSC 1109, Bethesda, MD 20892, USA.
| | - Sriram Gubbi
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney diseases, National Institutes of Health, 10 Center Drive, Bethesda, MD 20892, USA
| | - J David Spence
- Stroke Prevention and Atherosclerosis Research Centre, Robarts Research Institute, Western University, 1400 Western Road, London, ON N6G 2V4, Canada
| | - Constantine A Stratakis
- Internal Medicine-Endocrinology, Hypertension and Metabolic Genetics, Section on Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 10 Center Drive, MSC 1109, Bethesda, MD 20892, USA
| | - Christian A Koch
- The University of Tennessee Health Science Center, 910 Madison Avenue, Memphis, TN 38163, USA
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14
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Nanba K, Omata K, Gomez-Sanchez CE, Stratakis CA, Demidowich AP, Suzuki M, Thompson LDR, Cohen DL, Luther JM, Gellert L, Vaidya A, Barletta JA, Else T, Giordano TJ, Tomlins SA, Rainey WE. Genetic Characteristics of Aldosterone-Producing Adenomas in Blacks. Hypertension 2019; 73:885-892. [PMID: 30739536 DOI: 10.1161/hypertensionaha.118.12070] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Somatic mutations have been identified in aldosterone-producing adenomas (APAs) in genes that include KCNJ5, ATP1A1, ATP2B3, and CACNA1D. Based on independent studies, there appears to be racial differences in the prevalence of somatic KCNJ5 mutations, particularly between East Asians and Europeans. Despite the high cardiovascular disease mortality of blacks, there have been no studies focusing on somatic mutations in APAs in this population. In the present study, we investigated genetic characteristics of APAs in blacks using a CYP11B2 (aldosterone synthase) immunohistochemistry-guided next-generation sequencing approach. The adrenal glands with adrenocortical adenomas from 79 black patients with primary aldosteronism were studied. Seventy-three tumors from 69 adrenal glands were confirmed to be APAs by CYP11B2 immunohistochemistry. Sixty-five of 73 APAs (89%) had somatic mutations in aldosterone-driver genes. Somatic CACNA1D mutations were the most prevalent genetic alteration (42%), followed by KCNJ5 (34%), ATP1A1 (8%), and ATP2B3 mutations (4%). CACNA1D mutations were more often observed in APAs from males than those from females (55% versus 29%, P=0.033), whereas KCNJ5 mutations were more prevalent in APAs from females compared with those from males (57% versus 13%, P<0.001). No somatic mutations in aldosterone-driver genes were identified in tumors without CYP11B2 expression. In conclusion, 89% of APAs in blacks harbor aldosterone-driving mutations, and unlike Europeans and East Asians, the most frequently mutated aldosterone-driver gene was CACNA1D. Determination of racial differences in the prevalence of aldosterone-driver gene mutations may facilitate the development of personalized medicines for patients with primary aldosteronism.
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Affiliation(s)
- Kazutaka Nanba
- From the Department of Molecular and Integrative Physiology (K.N., W.E.R.), University of Michigan, Ann Arbor
| | - Kei Omata
- Department of Pathology (K.O., T.J.G., S.A.T.), University of Michigan, Ann Arbor
| | - Celso E Gomez-Sanchez
- Endocrine and Research Service, G.V. (Sonny) Montgomery VA Medical Center, Jackson, MS (C.E.G.-S.).,Division of Endocrinology, University of Mississippi Medical Center, Jackson (C.E.G.-S.)
| | - Constantine A Stratakis
- Section of Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD (C.A.S., A.P.D., M.S.)
| | - Andrew P Demidowich
- Section of Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD (C.A.S., A.P.D., M.S.)
| | - Mari Suzuki
- Section of Endocrinology and Genetics, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD (C.A.S., A.P.D., M.S.)
| | - Lester D R Thompson
- Department of Pathology, Woodland Hills Medical Center, Southern California Permanente Medical Group (L.D.R.T.)
| | - Debbie L Cohen
- Renal, Electrolyte and Hypertension Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia (D.L.C.)
| | - James M Luther
- Division of Clinical Pharmacology (J.M.L.), Vanderbilt University Medical Center, Nashville, TN
| | - Lan Gellert
- Department of Pathology, Microbiology and Immunology (L.G.), Vanderbilt University Medical Center, Nashville, TN
| | - Anand Vaidya
- Center for Adrenal Disorders, Division of Endocrinology, Diabetes, and Hypertension (A.V.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Justine A Barletta
- Department of Pathology (J.A.B.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Tobias Else
- Division of Metabolism, Endocrine, and Diabetes, Department of Internal Medicine (T.E., T.J.G., W.E.R.), University of Michigan, Ann Arbor
| | - Thomas J Giordano
- Department of Pathology (K.O., T.J.G., S.A.T.), University of Michigan, Ann Arbor.,Division of Metabolism, Endocrine, and Diabetes, Department of Internal Medicine (T.E., T.J.G., W.E.R.), University of Michigan, Ann Arbor.,Rogel Cancer Center (T.J.G., S.A.T.), University of Michigan, Ann Arbor
| | - Scott A Tomlins
- Department of Pathology (K.O., T.J.G., S.A.T.), University of Michigan, Ann Arbor.,Rogel Cancer Center (T.J.G., S.A.T.), University of Michigan, Ann Arbor.,Department of Urology (S.A.T.), University of Michigan, Ann Arbor.,Michigan Center for Translational Pathology (S.A.T.), University of Michigan, Ann Arbor
| | - William E Rainey
- From the Department of Molecular and Integrative Physiology (K.N., W.E.R.), University of Michigan, Ann Arbor.,Division of Metabolism, Endocrine, and Diabetes, Department of Internal Medicine (T.E., T.J.G., W.E.R.), University of Michigan, Ann Arbor
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15
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Hypertension Editors' Picks. Hypertension 2019; 73:e67-e82. [PMID: 31030605 DOI: 10.1161/hypertensionaha.119.13143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Zilbermint M, Hannah-Shmouni F, Stratakis CA. Genetics of Hypertension in African Americans and Others of African Descent. Int J Mol Sci 2019; 20:ijms20051081. [PMID: 30832344 PMCID: PMC6429313 DOI: 10.3390/ijms20051081] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Revised: 02/19/2019] [Accepted: 02/21/2019] [Indexed: 02/07/2023] Open
Abstract
Hypertension is the leading cause of cardiovascular disease in the United States, affecting up to one-third of adults. When compared to other ethnic or racial groups in the United States, African Americans and other people of African descent show a higher incidence of hypertension and its related comorbidities; however, the genetics of hypertension in these populations has not been studied adequately. Several genes have been identified to play a role in the genetics of hypertension. They include genes regulating the renin-aldosterone-angiotensin system (RAAS), such as Sodium Channel Epithelial 1 Beta Subunit (SCNN1B), Armadillo Repeat Containing 5 (ARMC5), G Protein-Coupled Receptor Kinase 4 (GRK4), and Calcium Voltage-Gated Channel Subunit Alpha1 D (CACNA1D). In this review, we focus on recent genetic findings available in the public domain for potential differences between African Americans and other populations. We also cover some recent and relevant discoveries in the field of low-renin hypertension from our laboratory at the National Institutes of Health. Understanding the different genetics of hypertension among various groups is essential for effective precision-guided medical therapy of high blood pressure.
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Affiliation(s)
- Mihail Zilbermint
- Section on Endocrinology and Genetics, The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, BG 31 RM 2A46, 31 Center Dr, Bethesda, MD 20892, USA.
- Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
- Johns Hopkins Community Physicians at Suburban Hospital, Bethesda, MD 20814, USA.
- Johns Hopkins University Carey Business School, Baltimore, MD 21202, USA.
| | - Fady Hannah-Shmouni
- Section on Endocrinology and Genetics, The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, BG 31 RM 2A46, 31 Center Dr, Bethesda, MD 20892, USA.
| | - Constantine A Stratakis
- Section on Endocrinology and Genetics, The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, BG 31 RM 2A46, 31 Center Dr, Bethesda, MD 20892, USA.
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17
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Wenner MM, Paul EP, Robinson AT, Rose WC, Farquhar WB. Acute NaCl Loading Reveals a Higher Blood Pressure for a Given Serum Sodium Level in African American Compared to Caucasian Adults. Front Physiol 2018; 9:1354. [PMID: 30327611 PMCID: PMC6174209 DOI: 10.3389/fphys.2018.01354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 09/07/2018] [Indexed: 01/13/2023] Open
Abstract
Purpose: African American individuals are more prone to salt-sensitive hypertension than Caucasian individuals. Small changes in serum sodium (Na+) result in increased blood pressure (BP). However, it remains unclear if there are racial differences in BP responsiveness to increases in serum Na+. Therefore, the purpose of this investigation was to determine if African American adults have altered BP responsiveness to acute changes in serum Na+ compared to Caucasian adults. Methods: We measured beat-by-beat BP, serum Na+, plasma renin activity (PRA), angiotensin II (Ang II), and aldosterone (Aldo) during a 60-min 3% NaCl infusion (hypertonic saline infusion, HSI) in 39 participants (19 African Americans, age: 23 ± 1, 20 Caucasians, age: 25 ± 1). Data reported as African American vs. Caucasian cohort, mean ± SEM. Results: Baseline BP and serum Na+ were similar between groups and increased during HSI in both African American and Caucasian participants (p < 0.01). However, the peak change in serum Na+ was greater in African American participants (Δ5.8 ± 0.34 vs. Δ4.85 ± 0.38 mmol/L, p = 0.03). There was a significant group effect (p = 0.02) and an interaction between race and serum Na+ on systolic BP (p = 0.02). Larger categorical changes in serum Na+ corresponded to changes in systolic BP (p < 0.01) and African American participants demonstrated greater systolic BP responses for a given categorical serum Na+ increase (p < 0.01). Baseline Aldo was lower in African American adults (7.2 ± 0.6 vs. 12.0 ± 1.9 ng/dL, p = 0.03), there was a trend for lower baseline PRA (0.59 ± 0.9 vs. 1.28 ± 0.34 ng/mL/h, p = 0.07), and baseline Ang II was not different (14.2 ± 1.8 vs. 18.5 ± 1.4 pg/mL, p = 0.17). PRA and Aldo decreased during the HSI (p ≤ 0.01), with a greater decline in PRA (Δ–0.31 ± 0.07 vs. Δ–0.85 ± 0.25 ng/mL/h, p < 0.01) and Aldo (Δ–2.5 ± 0.5 vs. Δ–5.0 ± 1.1 ng/dL, p < 0.01) in Caucasian participants. However, the racial difference in PRA (p = 0.57) and Aldo (p = 0.59) reduction were no longer significant following baseline covariate analysis. Conclusion: African American individuals demonstrate augmented serum Na+ to an acute hypertonic saline load and greater systolic BP responsiveness to a given serum Na+. The altered BP response may be attributable to lower basal PRA and Aldo and a subsequently blunted RAAS response during the HSI.
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Affiliation(s)
- Megan M Wenner
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, United States
| | - Erin P Paul
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, United States
| | - Austin T Robinson
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, United States
| | - William C Rose
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, United States
| | - William B Farquhar
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE, United States
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