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Elston DM. Letter from the editor: First do no harm-biotin for hair and nails. J Am Acad Dermatol 2024:S0190-9622(24)00576-0. [PMID: 38583666 DOI: 10.1016/j.jaad.2024.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Affiliation(s)
- Dirk M Elston
- Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina, Charleston, South Carolina.
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Cheng JYK, Wong FCK, Chow EWK, Lau WWH, Cheung KKT, Cheng THT, Tsui TKC, Chan ASL, Lo CWS, Ho CS. Chinese normotensive and essential hypertensive reference intervals for plasma aldosterone and renin activity by liquid chromatography-tandem mass spectrometry. Clin Chem Lab Med 2022; 60:1640-1647. [PMID: 35922153 DOI: 10.1515/cclm-2022-0325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 07/13/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The renin-angiotensin-aldosterone system (RAAS) regulates blood pressure. Plasma renin activities (PRA) and plasma aldosterone concentrations (PAC) are biomarkers related to RAAS. Liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based measurements for PRA and PAC have become popular. Method-specific reference intervals (RIs) are required. METHODS Routine PRA and PAC services in a Hong Kong teaching hospital were based on LC-MS/MS methods. PRA and PAC RIs were developed for normotensive subjects and essential hypertensive (EH) patients. Healthy volunteers were recruited to establish normotensive RIs. PRA and PAC results of hypertensive patients with urine aldosterone tests for primary aldosteronism (PA) screening were retrieved from the laboratory information system. Patients without PA were included. Patients with secondary hypertension and patients on medications affecting the RAAS were excluded. The central 95% RIs were established based on the recommendations of the Clinical and Laboratory Standards Institute guideline C28-A3. RESULTS PRA and PAC of 170 normotensive volunteers and 362 EH patients were analysed. There was no sex-specific difference in PRA and PAC for normotensive and EH reference subjects. Differences for PRA and PAC were noted between normotensive subjects aged below 45 and their older counterparts. However, such a difference was only identified for PRA but not PAC in EH patients. Age-specific RIs were established accordingly. CONCLUSIONS This study presented age-specific LC-MS/MS RIs of PRA and PAC for both normotensive and EH populations for local Chinese in Hong Kong.
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Affiliation(s)
- Jenny Yeuk-Ki Cheng
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Felix Chi-Kin Wong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Edith Wing-Kar Chow
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong
| | - Wendy Wan-Hang Lau
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong
| | - Kitty Kit-Ting Cheung
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong
| | - Timothy Hua-Tse Cheng
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Teresa Kam-Chi Tsui
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Alan Shek-Lun Chan
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Clara Wai-Shan Lo
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
| | - Chung-Shun Ho
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Statin, NT, Hong Kong
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