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Zhu J, Shao A, Wang C, Zeng C, Wang H. Inhibition of endoplasmic reticulum stress restores the balance of renal RAS components and lowers blood pressure in the spontaneously hypertensive rats. Clin Exp Hypertens 2023; 45:2202367. [PMID: 37144334 DOI: 10.1080/10641963.2023.2202367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
BACKGROUND Endoplasmic reticulum (ER) stress has been shown to play a critical role in the pathogenesis of hypertension. However, the underlying mechanisms for lowering blood pressure (BP) by suppressing ER stress remain unclear. Here, we hypothesized that inhibition of ER stress could restore the balance between RAS components and lower BP in spontaneously hypertensive rats (SHRs). METHODS Wistar-Kyoto (WKY) rats and SHRs received vehicle or 4-PBA, an ER stress inhibitor, in the drinking water for 4 weeks. BP was measured by tail-cuff plethysmography, and the expression of RAS components was examined by Western blot. RESULTS Compared with vehicle-treated WKY rats, vehicle-treated SHRs exhibited higher blood pressure and increased renal ER stress and oxidative stress, accompanied by impaired diuresis and natriuresis. Moreover, SHRs had higher ACE and AT1R and lower AT2R, ACE2, and MasR expressions in the kidney. Interestingly, 4-PBA treatment improved impaired diuresis and natriuresis and lowered blood pressure in SHRs, accompanied by reducing ACE and AT1R protein expression and increasing AT2R, ACE2, and MasR expression in the kidneys of SHRs. In addition, these changes were associated with the reduction of ER stress and oxidative stress. CONCLUSIONS These results suggest that the imbalance of renal RAS components was associated with increased ER stress in SHRs. Inhibition of ER stress with 4-PBA reversed the imbalance of renal RAS components and restored the impaired diuresis and natriuresis, which, at least in part, explains the blood pressure-lowering effects of 4-PBA in hypertension.
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Affiliation(s)
- Jun Zhu
- Department of Cardiology, Daping Hospital, The Third Military Medical University (Army Medical University), Chongqing, China
- Department of Cardiology, Shanghai Hospital Wanzhou District, Chongqing, China
| | - Anjing Shao
- Department of Cardiology, Daping Hospital, The Third Military Medical University (Army Medical University), Chongqing, China
| | - Chunyan Wang
- Department of Surgery, Third People's Hospital, Kaizhou District, Chongqing, China
| | - Chensi Zeng
- Department of Hematology, Chongqing Cancer Hospital, Chongqing, China
| | - Hongyong Wang
- Department of Cardiology, Daping Hospital, The Third Military Medical University (Army Medical University), Chongqing, China
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Wang LY, Shao A, Meng SK, Huang FB, Bai HX, Gao T, Yao K, Ye J. [A clinicopathological classification of space-occupying lesions of the orbit in 1 913 patients from 2000 to 2021]. Zhonghua Yan Ke Za Zhi 2023; 59:20-25. [PMID: 36631053 DOI: 10.3760/cma.j.cn112142-20220802-00373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Objective: To investigate the histopathological classification of orbital space-occupying lesions. Methods: This is a retrospective case series study. The clinical and pathological data of 1 913 tissue specimens from 1 913 patients with space-occupying lesions of the orbit which were examined in the Second Affiliated Hospital, Zhejiang University School of Medicine from January 2000 to December 2021 were collected. The mass lesions were classified based on histogenesis, pathological nature and age. Results: There were 913 males (47.7%) and 1 000 females (52.3%). The lesions were benign in 1 489 patients (77.8%) and malignant in 424 patients (22.2%). Based on histogenesis, there were 521 vasculogenic lesions (27.2%), which rancked first, 407 cystoid lesions (21.3%), 277 lymphoproliferative lesions (14.5%), 182 lacrimal gland lesions (9.5%) and 121 inflammatory lesions (6.3%). By pathological nature, there were 1 489 benign lesions, including cavernous hemangioma (275, 14.4%), dermoid cyst (225, 11.8%), other hemangiomas (199, 10.4%), epidermoid cyst (136, 7.1%) and benign mixed tumor of the lacrimal gland (134, 7.0%), and 257 malignant lesions, including lymphoma (210, 11.0%) and sebaceous gland carcinoma (47, 2.5%). The age of all patients ranged from 0 to 90 years, while 247 lesions (12.9%) occurred in patients aged 0 to18 years, 1 270 lesions (66.4%) in patients aged 19 to 59 years, and 396 lesions (20.7%) in patients aged 60 to 90 years. Conclusions: In 22 years, almost 2/3 benign orbital lesions in the Second Affiliated Hospital, Zhejiang University School of Medicine occurred in young and middle-aged patients, and males were fewer than females. The most common benign orbital tumors was cavernous hemangioma, followed by dermoid cyst and epidermoid cyst. And the most common malignant orbital tumor was lymphoma, which occurred more frequently in older patients.
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Affiliation(s)
- L Y Wang
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - A Shao
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - S K Meng
- Shaanxi Eye Hospital, Xi'an People'sHospital (Xi'an Fourth Hospital), Affiliated People's Hospital of Northwest University, Xi'an 710004, China
| | - F B Huang
- Department of Pathology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - H X Bai
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - T Gao
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - K Yao
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - J Ye
- Eye Center, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
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Marsman D, Belsky DW, Gregori D, Johnson MA, Low Dog T, Meydani S, Pigat S, Sadana R, Shao A, Griffiths JC. Healthy ageing: the natural consequences of good nutrition-a conference report. Eur J Nutr 2018; 57:15-34. [PMID: 29799073 PMCID: PMC5984649 DOI: 10.1007/s00394-018-1723-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Many countries are witnessing a marked increase in longevity and with this increased lifespan and the desire for healthy ageing, many, however, suffer from the opposite including mental and physical deterioration, lost productivity and quality of life, and increased medical costs. While adequate nutrition is fundamental for good health, it remains unclear what impact various dietary interventions may have on prolonging good quality of life. Studies which span age, geography and income all suggest that access to quality foods, host immunity and response to inflammation/infections, impaired senses (i.e., sight, taste, smell) or mobility are all factors which can limit intake or increase the body's need for specific micronutrients. New clinical studies of healthy ageing are needed and quantitative biomarkers are an essential component, particularly tools which can measure improvements in physiological integrity throughout life, thought to be a primary contributor to a long and productive life (a healthy "lifespan"). A framework for progress has recently been proposed in a WHO report which takes a broad, person-centered focus on healthy ageing, emphasizing the need to better understand an individual's intrinsic capacity, their functional abilities at various life stages, and the impact by mental, and physical health, and the environments they inhabit.
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Affiliation(s)
- D Marsman
- Procter & Gamble, Cincinnati, OH, USA
| | - D W Belsky
- Duke University, Raleigh-Durham, NC, USA
| | | | | | - T Low Dog
- Integrative Medicine Concepts, Tucson, AZ, USA
| | | | - S Pigat
- Creme Global, Dublin, Ireland
| | - R Sadana
- World Health Organization, Geneva, Switzerland
| | - A Shao
- Amway/Nutrilite, Buena Park, CA, USA
| | - J C Griffiths
- Council for Responsible Nutrition-International, Washington, DC, USA.
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Shao A, Drewnowski A, Willcox DC, Krämer L, Lausted C, Eggersdorfer M, Mathers J, Bell JD, Randolph RK, Witkamp R, Griffiths JC. Optimal nutrition and the ever-changing dietary landscape: a conference report. Eur J Nutr 2017; 56:1-21. [PMID: 28474121 PMCID: PMC5442251 DOI: 10.1007/s00394-017-1460-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The field of nutrition has evolved rapidly over the past century. Nutrition scientists and policy makers in the developed world have shifted the focus of their efforts from dealing with diseases of overt nutrient deficiency to a new paradigm aimed at coping with conditions of excess-calories, sedentary lifestyles and stress. Advances in nutrition science, technology and manufacturing have largely eradicated nutrient deficiency diseases, while simultaneously facing the growing challenges of obesity, non-communicable diseases and aging. Nutrition research has gone through a necessary evolution, starting with a reductionist approach, driven by an ambition to understand the mechanisms responsible for the effects of individual nutrients at the cellular and molecular levels. This approach has appropriately expanded in recent years to become more holistic with the aim of understanding the role of nutrition in the broader context of dietary patterns. Ultimately, this approach will culminate in a full understanding of the dietary landscape-a web of interactions between nutritional, dietary, social, behavioral and environmental factors-and how it impacts health maintenance and promotion.
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Affiliation(s)
- A Shao
- Herbalife Nutrition, Los Angeles, CA, USA
| | | | - D C Willcox
- Okinawa International University, Ginowan, Japan
| | - L Krämer
- Technische Universität Braunschweig, Brunswick, Germany
| | - C Lausted
- Institute for Systems Biology, Seattle, WA, USA
| | | | - J Mathers
- Newcastle University, Newcastle upon Tyne, UK
| | - J D Bell
- University of Westminster, London, UK
| | | | - R Witkamp
- Wageningen University, Wageningen, The Netherlands
| | - J C Griffiths
- Council for Responsible Nutrition-International, Washington, DC, USA.
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Yan S, Chen Q, Zhang X, Xu M, Han Q, Shao A, Liebeskind DS, Lou M. Extensive blooming artifact predicts no recanalization after intravenous thrombolysis. Eur J Neurol 2015; 23:737-43. [PMID: 26706832 DOI: 10.1111/ene.12930] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Accepted: 11/04/2015] [Indexed: 11/29/2022]
Affiliation(s)
- S. Yan
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - Q. Chen
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - X. Zhang
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - M. Xu
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - Q. Han
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - A. Shao
- Department of Neurosurgery; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
| | - D. S. Liebeskind
- University of California − Los Angeles Stroke Center; Los Angeles CA USA
| | - M. Lou
- Department of Neurology; School of Medicine; Second Affiliated Hospital of Zhejiang University; Hangzhou China
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Yin J, Wang L, Shi Y, Shao A, Tang W, Wang X, Ding G, Liu C, Chen S, Gu H. Interleukin 17A rs4711998 A>G polymorphism was associated with a decreased risk of esophageal cancer in a Chinese population. Dis Esophagus 2014; 27:87-92. [PMID: 23895419 DOI: 10.1111/dote.12045] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Esophageal cancer is the eighth most common cancer and sixth leading cause of cancer-associated death worldwide. Besides environmental risk factors, genetic factors might play an important role in the esophageal cancer carcinogenesis. We conducted a hospital-based case-control study to evaluate the genetic effects of functional single nucleotide polymorphisms (SNPs) in the interleukin 17A (IL17A) gene on the development of esophageal cancer. A total of 380 esophageal squamous cell carcinoma (ESCC) cases and 380 controls were recruited for this study. The genotypes were determined using a custom-by-design 48-Plex SNPscan Kit. IL17A rs4711998 A>G polymorphism was associated with the decreased risk of ESCC. When the IL17A rs4711998 AA homozygote genotype was used as the reference group, the AG genotype was associated with a significantly decreased risk for ESCC (AG vs. AA: adjusted odds ratio 0.72, 95% confidential interval 0.53-0.98, P = 0.039). However, there was no significant association between the other five SNPs and ESCC risk. Stratified analyses indicated that a significantly decreased risk of ESCC associated with the IL17A rs4711998 A>G polymorphism was evident among younger patients and patients who never smoking or drinking. These findings indicated that functional polymorphism IL17A rs4711998 A>G might contribute to ESCC susceptibility. However, our results were obtained with a limited sample size; the power of our analysis was low. Future larger studies with more rigorous study designs of other ethnic populations are required to confirm current findings.
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Affiliation(s)
- J Yin
- Department of Cardiothoracic Surgery, Affiliated People's Hospital of Jiangsu University, Zhenjiang, China
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Shao A, Broadmeadow A, Goddard G, Bejar E, Frankos V. Safety of purified decolorized (low anthraquinone) whole leaf Aloe vera (L) Burm. f. juice in a 3-month drinking water toxicity study in F344 rats. Food Chem Toxicol 2013; 57:21-31. [PMID: 23500775 DOI: 10.1016/j.fct.2013.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 02/28/2013] [Accepted: 03/03/2013] [Indexed: 12/17/2022]
Abstract
Decolorized (purified, low anthraquinone) whole leaf Aloe vera (L.) Burm. f. juice was administered at concentrations of 0%, 0.5%, 1% and 2% in the drinking water of F344Du rats for 3 months without any adverse effect. The no-observed-adverse-effect level (NOAEL) in this study was considered to be >2%w/v (>1845 mg/kg bodyweight/day for males and >2920 mg/kg bodyweight for females). The test material contained total anthraquinones at <0.1 parts per million. In the present study there was a complete absence of any histological alteration in samples from the cecum, colon (proximal, mid and distal regions). Similar concentrations of non-decolorized (unpurified, high anthraquinone) Aloe vera extracts tested in other studies have resulted in an increased incidence and severity of diarrhea and colon adenomas and carcinomas. The results of this study supports the assertion that the high levels of anthraquinone present in orally administered, non-purified whole leaf Aloe vera extract may be responsible for the adverse effects observed on the colon.
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Affiliation(s)
- A Shao
- Herbalife International of America Inc., 990 W 190th Street, Suite 650, Torrance, CA 90502, USA.
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Bischoff-Ferrari HA, Shao A, Dawson-Hughes B, Hathcock J, Giovannucci E, Willett WC. Benefit-risk assessment of vitamin D supplementation. Osteoporos Int 2010; 21:1121-32. [PMID: 19957164 PMCID: PMC3062161 DOI: 10.1007/s00198-009-1119-3] [Citation(s) in RCA: 204] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 10/26/2009] [Indexed: 12/21/2022]
Abstract
UNLABELLED Current intake recommendations of 200 to 600 IU vitamin D per day may be insufficient for important disease outcomes reduced by vitamin D. INTRODUCTION This study assessed the benefit of higher-dose and higher achieved 25-hydroxyvitamin D levels [25(OH)D] versus any associated risk. METHODS AND RESULTS Based on double-blind randomized control trials (RCTs), eight for falls (n = 2426) and 12 for non-vertebral fractures (n = 42,279), there was a significant dose-response relationship between higher-dose and higher achieved 25(OH)D and greater fall and fracture prevention. Optimal benefits were observed at the highest dose tested to date for 700 to 1000 IU vitamin D per day or mean 25(OH)D between 75 and 110 nmol/l (30-44 ng/ml). Prospective cohort data on cardiovascular health and colorectal cancer prevention suggested increased benefits with the highest categories of 25(OH)D evaluated (median between 75 and 110 nmol/l). In 25 RCTs, mean serum calcium levels were not related to oral vitamin D up to 100,000 IU per day or achieved 25(OH)D up to 643 nmol/l. Mean levels of 75 to 110 nmol/l were reached in most RCTs with 1,800 to 4,000 IU vitamin D per day without risk. CONCLUSION Our analysis suggests that mean serum 25(OH)D levels of about 75 to 110 nmol/l provide optimal benefits for all investigated endpoints without increasing health risks. These levels can be best obtained with oral doses in the range of 1,800 to 4,000 IU vitamin D per day; further work is needed, including subject and environment factors, to better define the doses that will achieve optimal blood levels in the large majority of the population.
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Affiliation(s)
- H A Bischoff-Ferrari
- Centre on Aging and Mobility, Department of Rheumatology and Institute of Physical Medicine, University Hospital Zurich, Gloriastrasse 25, 8091, Zurich, Switzerland.
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Abstract
Altered vitamin D receptor (VDR) level has been proposed to explain differences in intestinal responsiveness to 1,25-dihydroxyvitamin D3 [1,25(OH)2D3]. We tested whether the enterocyte VDR level influences 1,25(OH)2D3-mediated gene expression and transepithelial calcium (Ca) transport in the human intestinal cell line Caco-2. Cells were stably transfected with a human metallothionein (hMT) IIA promoter-human VDR (hVDR) complementary DNA (cDNA) transgene that overexpressed hVDR in response to heavy metals. In MTVDR clones, induction of 25-hyroxyvitamin D3-24-hydroxylase (24-OHase) messenger RNA (mRNA) expression by 1,25(OH)2D3 (10(-9) M, 4 h) was correlated to metal-induced changes in nuclear VDR level (r2 = 0.99). In MTVDR clones, basal VDR level was 2-fold greater and 1,25(OH)2D3-mediated Ca transport (10(-7) M, 24 h) was 43% higher than in parental Caco-2 cells. Treatment of MTVDR clones with Cd (1 microM, 28 h) increased VDR level by 68%, significantly enhanced 1,25(OH)2D3-mediated Ca transport by 24%, and increased accumulation of calbindin D9K mRNA by 76% relative to 1,25(OH)2D3 alone. These observations support the hypothesis that the enterocyte VDR level is an important modulator of intestinal responsiveness to 1,25(OH)2D3.
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Affiliation(s)
- A Shao
- United States Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts, USA
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Abstract
We have previously shown that dextran (molecular weight 4kDa) is a potential mucolytic agent, reducing the viscoelasticity and spinnability of cystic fibrosis (CF) sputum and improving its mucociliary clearability during in vitro testing. We wished to see whether low molecular weight (LMW) dextran had similar effects on mucus rheology when administered by aerosol to living dogs, and whether the administration of dextran increased the rate of mucociliary clearance. Healthy mongrel dogs were anesthetized with pentobarbital and intubated. After a 30-min Ringer aerosol delivery during spontaneous breathing, tracheal mucociliary velocity (TMV by charcoal marker particle transport) was measured under bronchoscopic control, and mucus for viscoelasticity analysis (magnetic rheometer) was collected by the endotracheal tube method. Then LMW dextran in Ringer vehicle was delivered by aerosol via the endotracheal tube, followed by the same procedures. We performed eight experiments in eight dogs, involving 30 min administrations of dextran aerosol; all dogs received inhalations of 20 mg/ml, 65 mg/ml, and 200 mg/ml dextran. Compared with Ringer control, TMV increased to 145% of control (P=0.0417) at 65 mg/ml dextran. Mucus viscoelasticity (G*) significantly decreased to 19% of control (P=0.0426) at 65 mg/ml. This in vivo study supports our previous in vitro testing, that LMW dextran decreases the mucus viscoelasticity and increases the rate of mucociliary clearance. We estimate the dosage received by aerosol at 65 mg/ml to be within the effective concentration range studied in vitro, i.e. 10-15 mg/ml final concentration. The results are consistent with the proposed mechanism that the saccharide moieties in LMW dextran compete for hydrogen bonding sites with other mucous glycoproteins. These new hydrogen bonds are structurally and rheologically ineffective, thus reducing the overall cross-link density, and making the mucus more easily cleared by ciliary and cough mechanisms.
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Affiliation(s)
- W Feng
- Pulmonary Research Group, University of Alberta, Edmonton, Alberta, T6G 2S2, Canada
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Zhang Y, Li F, Shao A, Chen K. [Influence of processing on effective components in rhizoma chuanxiong]. Zhongguo Zhong Yao Za Zhi 1998; 23:275-7, 319. [PMID: 11601312] [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: 02/21/2023]
Abstract
The contents of the essential oil ferulic acid in different processed products of Rhizoma Chuanxiong were determined, and the changes of constituents in the essential oil before and after processing were compared. The results have provided a scientific basis for processing Rhizoma Chuanxiong.
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Affiliation(s)
- Y Zhang
- College of Chinese Pharmacy, Beijing University of Traditional Chinese Medicine, Beijing 100029
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Li X, Chen M, Dai R, Shao A, Wu Z, Lin S. [A preliminary study on extracellular polysaccharide isolated from fermented Tremella aurantia Schw. ex Fr]. Zhongguo Zhong Yao Za Zhi 1997; 22:745-6, 765. [PMID: 11243174] [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: 02/19/2023]
Abstract
TaA, the extracellular polysaccharide purified from the filtrate of fermented Tremella aurantia, is a water-soluble neutral polysaccharide. Gas chromatography of its alditol acetates has shown that TaA is composed of mannose and xylose by the ratio of 2.85:1. The physical and chemical properties of TaA have been characterized.
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Affiliation(s)
- X Li
- Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700
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Shao A, Nowaczynski W, Kuchel O, Genest J. Secretion rate of dehydroepiandrosterone and dehydroepiandrosterone sulfate in benign essential hypertension as compared to normal subjects. Can J Biochem 1970; 48:1308-13. [PMID: 4251990 DOI: 10.1139/o70-203] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A study of the secretion rate of dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEA-S) in normal subjects and patients with benign essential hypertension by a double isotope dilution method showed a fivefold increase in the secretion rate of dehydroepiandrosterone (from 9.8 mg/day ± 3.1 mg/day S.D. to 52.0 mg/day ± 15.5 mg/day S.D.), and a sixfold increase of dehydroepiandrosterone sulfate in hypertensive patients (from 10.7 mg/day ± 2.9 mg/day S.D. to 60.7 mg/day ± 18.6 mg/day S.D.). This study was carried out following the administration of 14C-labelled DHEA and 3H-labelled DHEA-S and involved an initial column chromatographic separation of urinary DHEA-glucuronide and sulfate.
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