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Popoviciu MS, Paduraru L, Nutas RM, Ujoc AM, Yahya G, Metwally K, Cavalu S. Diabetes Mellitus Secondary to Endocrine Diseases: An Update of Diagnostic and Treatment Particularities. Int J Mol Sci 2023; 24:12676. [PMID: 37628857 PMCID: PMC10454882 DOI: 10.3390/ijms241612676] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/31/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Secondary diabetes mellitus is frequently ignored in specialized literature. In this narrative review, the main endocrinopathies accompanied by increased glycemic values are identified, as well as the mechanisms by which the excess or deficiency of certain hormones impact beta cell function or insulin resistance. The main endocrinopathies (acromegaly, Cushing's syndrome, Basedow-Graves' disease, pheochromocytoma, somatostatinoma and glucagonoma) and their characteristics are described along with the impact of hormone changes on blood sugar, body mass index and other parameters associated with diabetes. The overall information regarding the complex molecular mechanisms that cause the risk of secondary diabetes and metabolic syndrome is of crucial importance in order to prevent the development of the disease and its complications and particularly to reduce the cardiovascular risk of these patients. The purpose of this study is to highlight the particular features of endocrine pathologies accompanied by an increased risk of developing diabetes, in the context of personalized therapeutic decision making. The epidemiological, physiopathological, clinical and therapeutic approaches are presented along with the importance of screening for diabetes in endocrine diseases.
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Affiliation(s)
- Mihaela Simona Popoviciu
- Faculty of Medicine and Pharmacy, University of Oradea, P-ta 1 Decembrie 10, 410073 Oradea, Romania; (M.S.P.); (L.P.); (S.C.)
| | - Lorena Paduraru
- Faculty of Medicine and Pharmacy, University of Oradea, P-ta 1 Decembrie 10, 410073 Oradea, Romania; (M.S.P.); (L.P.); (S.C.)
| | | | - Alexandra Maria Ujoc
- Bihor County Emergency Clinic Hospital, 410167 Oradea, Romania; (R.M.N.); (A.M.U.)
| | - Galal Yahya
- Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Kamel Metwally
- Department of Medicinal Chemistry, Faculty of Pharmacy, University of Tabuk, Tabuk 71491, Saudi Arabia;
- Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Simona Cavalu
- Faculty of Medicine and Pharmacy, University of Oradea, P-ta 1 Decembrie 10, 410073 Oradea, Romania; (M.S.P.); (L.P.); (S.C.)
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Fernandes A, Falcão L, Raimundo M. A Severe Case of Hypokalemic Metabolic Alkalosis: A Quiz. Am J Kidney Dis 2023; 81:A13-A16. [PMID: 36958884 DOI: 10.1053/j.ajkd.2022.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/05/2022] [Indexed: 03/25/2023]
Affiliation(s)
| | - Luís Falcão
- Nephrology Department, Hospital Beatriz Ângelo, Loures, Portugal
| | - Mário Raimundo
- Nephrology Department, Hospital Beatriz Ângelo, Loures, Portugal
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Kurimoto J, Takagi H, Miyata T, Kawaguchi Y, Hodai Y, Tsumura T, Hagiwara D, Kobayashi T, Yasuda Y, Sugiyama M, Onoue T, Iwama S, Suga H, Banno R, Katsuki T, Ando F, Uchida S, Arima H. Mineralocorticoids induce polyuria by reducing apical aquaporin-2 expression of the kidney in partial vasopressin deficiency. Endocr J 2023; 70:295-304. [PMID: 36450452 DOI: 10.1507/endocrj.ej22-0339] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The symptoms of diabetes insipidus may be masked by the concurrence of adrenal insufficiency and emerge after the administration of hydrocortisone, occasionally at high doses. To elucidate the mechanism underlying polyuria induced by the administration of high-dose corticosteroids in the deficiency of arginine vasopressin (AVP), we first examined the secretion of AVP in three patients in whom polyuria was observed only after the administration of high-dose corticosteroids. Next, we examined the effects of dexamethasone or aldosterone on water balance in wild-type and familial neurohypophyseal diabetes insipidus (FNDI) model mice. A hypertonic saline test showed that AVP secretion was partially impaired in all patients. In one patient, there were no apparent changes in AVP secretion before and after the administration of high-dose corticosteroids. In FNDI mice, unlike dexamethasone, the administration of aldosterone increased urine volumes and decreased urine osmolality. Immunohistochemical analyses showed that, after the administration of aldosterone in FNDI mice, aquaporin-2 expression was decreased in the apical membrane and increased in the basolateral membrane in the collecting duct. These changes were not observed in wild-type mice. The present data suggest that treatment with mineralocorticoids induces polyuria by reducing aquaporin-2 expression in the apical membrane of the kidney in partial AVP deficiency.
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Affiliation(s)
- Junki Kurimoto
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Hiroshi Takagi
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan
| | - Takashi Miyata
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yohei Kawaguchi
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yuichi Hodai
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Tetsuro Tsumura
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Daisuke Hagiwara
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Tomoko Kobayashi
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Yoshinori Yasuda
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Mariko Sugiyama
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Takeshi Onoue
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Shintaro Iwama
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Hidetaka Suga
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
| | - Ryoichi Banno
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
- Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya 464-8601, Japan
| | - Takeshi Katsuki
- Department of Diabetes and Endocrinology, Tokyo Saiseikai Central Hospital, Tokyo 108-0073, Japan
| | - Fumiaki Ando
- Department of Nephrology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Shinichi Uchida
- Department of Nephrology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8519, Japan
| | - Hiroshi Arima
- Department of Endocrinology and Diabetes, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
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Douma LG, Costello HM, Crislip GR, Cheng KY, Lynch IJ, Juffre A, Barral D, Masten S, Roig E, Beguiristain K, Li W, Bratanatawira P, Wingo CS, Gumz ML. Kidney-specific KO of the circadian clock protein PER1 alters renal Na + handling, aldosterone levels, and kidney/adrenal gene expression. Am J Physiol Renal Physiol 2022; 322:F449-F459. [PMID: 35129370 PMCID: PMC9169971 DOI: 10.1152/ajprenal.00385.2021] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 01/20/2022] [Accepted: 01/28/2022] [Indexed: 11/22/2022] Open
Abstract
PERIOD 1 (PER1) is a circadian clock transcription factor that is regulated by aldosterone, a hormone that increases blood volume and Na+ retention to increase blood pressure. Male global Per1 knockout (KO) mice develop reduced night/day differences in Na+ excretion in response to a high-salt diet plus desoxycorticosterone pivalate treatment (HS + DOCP), a model of salt-sensitive hypertension. In addition, global Per1 KO mice exhibit higher aldosterone levels on a normal-salt diet. To determine the role of Per1 in the kidney, male kidney-specific Per1 KO (KS-Per1 KO) mice were generated using Ksp-cadherin Cre recombinase to remove exons 2-8 of Per1 in the distal nephron and collecting duct. Male KS-Per1 KO mice have increased Na+ retention but have normal diurnal differences in Na+ excretion in response to HS + DOCP. The increased Na+ retention is associated with altered expression of glucocorticoid and mineralocorticoid receptors, increased serum aldosterone, and increased medullary endothelin-1 compared with control mice. Adrenal gland gene expression analysis revealed that circadian clock and aldosterone synthesis genes have altered expression in KS-Per1 KO mice compared with control mice. These results emphasize the importance of the circadian clock not only in maintaining rhythms of physiological functions but also for adaptability in response to environmental cues, such as HS + DOCP, to maintain overall homeostasis. Given the prevalence of salt-sensitive hypertension in the general population, these findings have important implications for our understanding of how circadian clock proteins regulate homeostasis.NEW & NOTEWORTHY For the first time, we show that knockout of the circadian clock transcription factor PERIOD 1 using kidney-specific cadherin Cre results in increased renal Na+ reabsorption, increased aldosterone levels, and changes in gene expression in both the kidney and adrenal gland. Diurnal changes in renal Na+ excretion were not observed, demonstrating that the clock protein PER1 in the kidney is important for maintaining homeostasis and that this effect may be independent of time of day.
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Affiliation(s)
- Lauren G Douma
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
| | - Hannah M Costello
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - G Ryan Crislip
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Kit-Yan Cheng
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - I Jeanette Lynch
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
- North Florida/South Georgia Malcolm Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Alexandria Juffre
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
| | - Dominique Barral
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Sarah Masten
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Emilio Roig
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Kevin Beguiristain
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Wendy Li
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Phillip Bratanatawira
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
| | - Charles S Wingo
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
- North Florida/South Georgia Malcolm Randall Veterans Affairs Medical Center, Gainesville, Florida
| | - Michelle L Gumz
- Department of Physiology and Functional Genomics, University of Florida, Gainesville, Florida
- Division of Nephrology, Hypertension, and Renal Transplantation, Department of Medicine, University of Florida, Gainesville, Florida
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida
- Center for Integrative Cardiovascular and Metabolic Diseases, University of Florida, Gainesville, Florida
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5
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Zieg J. Diagnosis and management of hypernatraemia in children. Acta Paediatr 2022; 111:505-510. [PMID: 34716953 DOI: 10.1111/apa.16170] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/30/2022]
Abstract
Hypernatraemia is most commonly caused by excessive loss of solute-free water or decreased fluid intake; less often, the aetiology is salt intoxication. Especially infants, young children and individuals with a lack of access to water are at risk of developing hypernatraemia. Diagnosis is based on detailed history, physical examination and basic laboratory tests. Correction of hypernatraemia must be slow to prevent cerebral oedema and irreversible brain damage. This article reviews the aetiology, differential diagnosis and management of conditions associated with paediatric hypernatraemia. Distinguishing states with water deficiency from states with salt excess is important for proper management of hypernatraemic patients.
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Affiliation(s)
- Jakub Zieg
- Department of Paediatrics Second Medical Faculty Motol University HospitalCharles University Prague Czech Republic
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Tanaka S, Fujishiro M, Imatake K, Suzuki Y, Ishihara H, Tani S. Impact of Female Sex on the Susceptibility to Hypernatremia Among Older Community-Dwelling Individuals in Japan. Int J Gen Med 2022; 15:777-785. [PMID: 35082525 PMCID: PMC8786365 DOI: 10.2147/ijgm.s345150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 12/21/2021] [Indexed: 11/23/2022] Open
Affiliation(s)
- Sho Tanaka
- Department of Internal Medicine, Nihon University Hospital, Tokyo, 101-8309, Japan
- Division of Diabetes and Metabolic Diseases, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Midori Fujishiro
- Department of Internal Medicine, Nihon University Hospital, Tokyo, 101-8309, Japan
- Division of Diabetes and Metabolic Diseases, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
- Correspondence: Midori Fujishiro, Department of Internal Medicine, Nihon University Hospital, 1-6 Surugadai, Kanda, Chiyoda-ku, Tokyo, 101-8309, Japan, Tel +81-3-3972-8111, Fax +81-3-3959-9775, Email
| | - Kazuhiro Imatake
- Department of Health Planning Center, Nihon University Hospital, Tokyo, 101-8309, Japan
| | - Yasuyuki Suzuki
- Department of Health Planning Center, Nihon University Hospital, Tokyo, 101-8309, Japan
- Department of Cardiology, Nihon University Hospital, Tokyo, 101-8309, Japan
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Hisamitsu Ishihara
- Division of Diabetes and Metabolic Diseases, Department of Internal Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
| | - Shigemasa Tani
- Department of Health Planning Center, Nihon University Hospital, Tokyo, 101-8309, Japan
- Department of Cardiology, Nihon University Hospital, Tokyo, 101-8309, Japan
- Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, 173-8610, Japan
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7
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Hyndman KA, Isaeva E, Palygin O, Mendoza LD, Rodan AR, Staruschenko A, Pollock JS. Role of collecting duct principal cell NOS1β in sodium and potassium homeostasis. Physiol Rep 2021; 9:e15080. [PMID: 34665521 PMCID: PMC8525323 DOI: 10.14814/phy2.15080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/15/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022] Open
Abstract
The nitric oxide (NO)-generating enzyme, NO synthase-1β (NOS1β), is essential for sodium (Na+ ) homeostasis and blood pressure control. We previously showed that collecting duct principal cell NOS1β is critical for inhibition of the epithelial sodium channel (ENaC) during high Na+ intake. Previous studies on freshly isolated cortical collecting ducts (CCD) demonstrated that exogenous NO promotes basolateral potassium (K+ ) conductance through basolateral channels, presumably Kir 4.1 (Kcnj10) and Kir 5.1 (Kcnj16). We, therefore, investigated the effects of NOS1β knockout on Kir 4.1/Kir 5.1 channel activity. Indeed, in CHO cells overexpressing NOS1β and Kir 4.1/Kir 5.1, the inhibition of NO signaling decreased channel activity. Male littermate control and principal cell NOS1β knockout mice (CDNOS1KO) on a 7-day, 4% NaCl diet (HSD) were used to detect changes in basolateral K+ conductance. We previously demonstrated that CDNOS1KO mice have high circulating aldosterone despite a high-salt diet and appropriately suppressed renin. We observed greater Kir 4.1 cortical abundance and significantly greater Kir 4.1/Kir 5.1 single-channel activity in the principal cells from CDNOS1KO mice. Moreover, blocking aldosterone action with in vivo spironolactone treatment resulted in lower Kir 4.1 abundance and greater plasma K+ in the CDNOS1KO mice compared to controls. Lowering K+ content in the HSD prevented the high aldosterone and greater plasma Na+ of CDNOS1KO mice and normalized Kir 4.1 abundance. We conclude that during chronic HSD, lack of NOS1β leads to increased plasma K+ , enhanced circulating aldosterone, and activation of ENaC and Kir 4.1/Kir 5.1 channels. Thus, principal cell NOS1β is required for the regulation of both Na+ and K+ by the kidney.
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Affiliation(s)
- Kelly A. Hyndman
- Department of MedicineDivision of NephrologySection of Cardio‐Renal Physiology and MedicineUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Elena Isaeva
- Department of Cellular Biology, Neurobiology and AnatomyMedical College of WisconsinMilwaukeeWisconsinUSA
| | - Oleg Palygin
- Division of NephrologyDepartment of MedicineMedical University of South CarolinaCharlestonSouth CarolinaUSA
| | - Luciano D. Mendoza
- Department of MedicineDivision of NephrologySection of Cardio‐Renal Physiology and MedicineUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Aylin R. Rodan
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
- The Department of Internal MedicineDivision of Nephrology and HypertensionUniversity of UtahSalt Lake CityUtahUSA
- The Department of Human GeneticsUniversity of UtahSalt Lake CityUtahUSA
- The Medical ServiceVeterans Affairs Salt Lake City Health Care SystemSalt Lake CityUtahUSA
| | - Alexander Staruschenko
- Department of Molecular Pharmacology and PhysiologyUniversity of South FloridaTampaFloridaUSA
- The James A. Haley Veterans HospitalTampaFloridaUSA
| | - Jennifer S. Pollock
- Department of MedicineDivision of NephrologySection of Cardio‐Renal Physiology and MedicineUniversity of Alabama at BirminghamBirminghamAlabamaUSA
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Ingabire PM, Ojji DB, Rayner B, Ogola E, Damasceno A, Jones E, Dzudie A, Ogah OS, Poulter N, Sani MU, Barasa FA, Shedul G, Mukisa J, Mukunya D, Wandera B, Batte C, Kayima J, Pandie S, Mondo CK. High prevalence of non-dipping patterns among Black Africans with uncontrolled hypertension: a secondary analysis of the CREOLE trial. BMC Cardiovasc Disord 2021; 21:254. [PMID: 34022790 PMCID: PMC8141234 DOI: 10.1186/s12872-021-02074-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 05/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dipping of blood pressure (BP) at night is a normal physiological phenomenon. However, a non-dipping pattern is associated with hypertension mediated organ damage, secondary forms of hypertension and poorer long-term outcome. Identifying a non-dipping pattern may be useful in assessing risk, aiding the decision to investigate for secondary causes, initiating treatment, assisting decisions on choice and timing of antihypertensive therapy, and intensifying salt restriction. OBJECTIVES To estimate the prevalence and factors associated with non-dipping pattern and determine the effect of 6 months of three antihypertensive regimens on the dipping pattern among Black African hypertensive patients. METHODS This was a secondary analysis of the CREOLE Study which was a randomized, single blind, three-group trial conducted in 10 sites in 6 Sub-Saharan African countries. The participants were 721 Black African patients, aged between 30 and 79 years, with uncontrolled hypertension and a baseline 24-h ambulatory blood pressure monitoring (ABPM). Dipping was calculated from the average day and average night systolic blood pressure measures. RESULTS The prevalence of non-dipping pattern was 78% (564 of 721). Factors that were independently associated with non-dipping were: serum sodium > 140 mmol/l (OR = 1.72, 95% CI 1.17-2.51, p-value 0.005), a higher office systolic BP (OR = 1.03, 95% CI 1.01-1.05, p-value 0.003) and a lower office diastolic BP (OR = 0.97, 95% CI 0.95-0.99, p-value 0.03). Treatment allocation did not change dipping status at 6 months (McNemar's Chi2 0.71, p-value 0.40). CONCLUSION There was a high prevalence of non-dipping among Black Africans with uncontrolled hypertension. ABPM should be considered more routinely in Black Africans with uncontrolled hypertension, if resources permit, to help personalise therapy. Further research is needed to understand the mechanisms and causes of non-dipping pattern and if targeting night-time BP improves clinical outcomes. Trial registration ClinicalTrials.gov (NCT02742467).
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Affiliation(s)
- Prossie Merab Ingabire
- St. Francis Hospital, Nsambya, Kampala, Uganda
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
| | - Dike B. Ojji
- Department of Medicine, Faculty of Clinical Sciences, University of Abuja, Abuja, Nigeria
- University of Abuja Teaching Hospital, Gwagwalada, Nigeria
| | - Brian Rayner
- Division of Nephrology and Hypertension, Cape Town, South Africa
| | - Elijah Ogola
- Department of Clinical Medicine and Therapeutics, University of Nairobi, Nairobi, Kenya
| | | | - Erika Jones
- Division of Nephrology and Hypertension, Cape Town, South Africa
| | | | - Okechukwu S. Ogah
- Cardiology Unit, Department of Medicine, University of Ibadan/University College Hospital, Ibadan, Nigeria
| | - Neil Poulter
- Imperial Clinical Trials Unit, School of Public Health, Imperial College London, London, UK
| | - Mahmoud U. Sani
- Department of Medicine, Bayero University, Aminu Kano Teaching Hospital, Kano, Nigeria
| | - Felix Ayub Barasa
- Department of Cardiology, Moi Teaching and Referral Hospital, Eldoret, Kenya
| | - Grace Shedul
- Pharmacy, University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria
| | - John Mukisa
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
| | - David Mukunya
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
- Faculty of Health Sciences, Busitema University, Mbale, Uganda
| | - Bonnie Wandera
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
| | - Charles Batte
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
| | - James Kayima
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
| | - Shahiemah Pandie
- Hatter Institute of Cardiovascular Research in Africa, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | | | - CREOLE Study Investigators
- St. Francis Hospital, Nsambya, Kampala, Uganda
- MakNCD D43 Project, Makerere University College of Health Sciences, Kampala, Uganda
- Faculty of Health Sciences, Busitema University, Mbale, Uganda
- Department of Medicine, Faculty of Clinical Sciences, University of Abuja, Abuja, Nigeria
- University of Abuja Teaching Hospital, Gwagwalada, Nigeria
- Pharmacy, University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria
- Cardiology Unit, Department of Medicine, University of Ibadan/University College Hospital, Ibadan, Nigeria
- Department of Medicine, Bayero University, Aminu Kano Teaching Hospital, Kano, Nigeria
- Division of Nephrology and Hypertension, Cape Town, South Africa
- Hatter Institute of Cardiovascular Research in Africa, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Imperial Clinical Trials Unit, School of Public Health, Imperial College London, London, UK
- Department of Cardiology, Moi Teaching and Referral Hospital, Eldoret, Kenya
- Department of Clinical Medicine and Therapeutics, University of Nairobi, Nairobi, Kenya
- Eduardo Mondlane University Hospital, Maputo, Mozambique
- Douala General Hospital, Douala, Cameroon
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10
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Abstract
Primary aldosteronism (PA), the most common form of secondary hypertension, can be either surgically cured or treated with targeted pharmacotherapy. PA is frequently undiagnosed and untreated, leading to aldosterone-specific cardiovascular morbidity and nephrotoxicity. Thus, clinicians should perform case detection testing for PA at least once in all patients with hypertension. Confirmatory testing is indicated in most patients with positive case detection testing results. The next step is to determine whether patients with confirmed PA have a disease that can be cured with surgery or whether it should be treated medically; this step is guided by computed tomography scan of the adrenal glands and adrenal venous sampling. With appropriate surgical expertise, laparoscopic unilateral adrenalectomy is safe, efficient and curative in patients with unilateral adrenal disease. In patients who have bilateral aldosterone hypersecretion, the optimal management is a low-sodium diet and lifelong treatment with a mineralocorticoid receptor antagonist administered at a dosage to maintain a high-normal serum potassium concentration without the aid of oral potassium supplements.
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Affiliation(s)
- W F Young
- Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic, Rochester, MN, USA
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11
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Rashmi P, Colussi G, Ng M, Wu X, Kidwai A, Pearce D. Glucocorticoid-induced leucine zipper protein regulates sodium and potassium balance in the distal nephron. Kidney Int 2017; 91:1159-1177. [PMID: 28094030 DOI: 10.1016/j.kint.2016.10.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 10/06/2016] [Accepted: 10/27/2016] [Indexed: 01/21/2023]
Abstract
Glucocorticoid induced leucine zipper protein (GILZ) is an aldosterone-regulated protein that controls sodium transport in cultured kidney epithelial cells. Mice lacking GILZ have been reported previously to have electrolyte abnormalities. However, the mechanistic basis has not been explored. Here we provide evidence supporting a role for GILZ in modulating the balance of renal sodium and potassium excretion by regulating the sodium-chloride cotransporter (NCC) activity in the distal nephron. Gilz-/- mice have a higher plasma potassium concentration and lower fractional excretion of potassium than wild type mice. Furthermore, knockout mice are more sensitive to NCC inhibition by thiazides than are the wild type mice, and their phosphorylated NCC expression is higher. Despite increased NCC activity, knockout mice do not have higher blood pressure than wild type mice. However, during sodium deprivation, knockout mice come into sodium balance more quickly, than do the wild type, without a significant increase in plasma renin activity. Upon prolonged sodium restriction, knockout mice develop frank hyperkalemia. Finally, in HEK293T cells, exogenous GILZ inhibits NCC activity at least in part by inhibiting SPAK phosphorylation. Thus, GILZ promotes potassium secretion by inhibiting NCC and enhancing distal sodium delivery to the epithelial sodium channel. Additionally, Gilz-/- mice have features resembling familial hyperkalemic hypertension, a human disorder that manifests with hyperkalemia associated variably with hypertension.
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Affiliation(s)
- Priyanka Rashmi
- Division of Nephrology, Department of Medicine, University of California, San Francisco, California, USA
| | - GianLuca Colussi
- Department of Experimental and Clinical Medical Sciences, University of Udine, Udine, Italy
| | - Michael Ng
- Division of Nephrology, Department of Medicine, University of California, San Francisco, California, USA
| | - Xinhao Wu
- Division of Nephrology, Department of Medicine, University of California, San Francisco, California, USA
| | - Atif Kidwai
- Division of Nephrology, Department of Medicine, University of California, San Francisco, California, USA
| | - David Pearce
- Division of Nephrology, Department of Medicine, University of California, San Francisco, California, USA.
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Liamis G, Filippatos TD, Elisaf MS. Evaluation and treatment of hypernatremia: a practical guide for physicians. Postgrad Med 2016; 128:299-306. [PMID: 26813151 DOI: 10.1080/00325481.2016.1147322] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hypernatremia (serum sodium concentration >145 mEq/L) is a common electrolyte disorder with increased morbidity and mortality especially in the elderly and critically ill patients. The review presents the main pathogenetic mechanisms of hypernatremia, provides specific directions for the evaluation of patients with increased sodium levels and describes a detailed algorithm for the proper correction of hypernatremia. Furthermore, two representative cases of hypovolemic and hypervolemic hypernatremia are presented along with practical clues for their proper evaluation and treatment. Accurate diagnosis and appropriate treatment is crucial since undercorrection or overcorrection of hypernatremia are both associated with poor patients' prognosis.
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Affiliation(s)
- George Liamis
- a Department of Internal Medicine , School of Medicine, University of Ioannina , Ioannina , Greece
| | - Theodosios D Filippatos
- a Department of Internal Medicine , School of Medicine, University of Ioannina , Ioannina , Greece
| | - Moses S Elisaf
- a Department of Internal Medicine , School of Medicine, University of Ioannina , Ioannina , Greece
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Hoorn EJ, Hesselink DA, Kho MM, Roodnat JI, Weimar W, van Saase JL, van den Meiracker AH, Zietse R. A case of primary aldosteronism revealed after renal transplantation. Nat Rev Nephrol 2010; 7:55-60. [PMID: 21102541 DOI: 10.1038/nrneph.2010.158] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND A 57-year-old woman was referred to a nephrology clinic because of chronic hypokalemia. She had a history of polycystic kidney disease, resistant hypertension, atrial fibrillation, type 2 diabetes, stroke, and end-stage renal disease, and had received a kidney transplant from a deceased donor at the age of 48 years. At presentation, the patient described symptoms of chronic fatigue and muscle aches, but she did not report pareses. Her medications included four antihypertensive agents, glucose-lowering drugs, immunosuppressants, digoxin, a coumarin derivative, and potassium chloride. INVESTIGATIONS Full history, physical examination, laboratory testing of blood and urine, including aldosterone-torenin ratio, and a saline infusion test. DIAGNOSIS Primary aldosteronism. MANAGEMENT Treatment with spironolactone resulted in prompt control of hypertension and hypokalemia, allowing discontinuation of potassium chloride and reduction in antihypertensive medication.
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Affiliation(s)
- Ewout J Hoorn
- Department of Internal Medicine, Erasmus Medical Center, Gravendijkwal 230, 3015 CE Rotterdam, The Netherlands
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Abstract
Large, Ca-activated K channels (BK) are comprised of an α pore (BKα) and one of four β subunits (BKβ1-4). When the gene for BKβ1 is knocked out (BKβ1-KO), the result is increased myogenic tone of vascular smooth muscle and hypertension. We reexamined whether the hypertension is entirely due to increased vascular tone, because most monogenic forms of hypertension have renal origins and BKβ1 resides in renal connecting tubule (CNT) cells. Moreover, BKβ1 is localized in the adrenal glands, where it may control production of aldosterone. This review will summarize our report that a majority of the hypertension of BKβ1-KO is the result of insufficient handling of dietary K, resulting in increased plasma K and hyperaldosteronism, the latter promoting Na and fluid retention. The fluid retention and hypertension are exacerbated by a high-K diet and reduced by eplerenone, an aldosterone receptor inhibitor. Genetic knockout of BKβ4 (BKβ4-KO), which resides in intercalated cells, also exhibits deficient K excretion, fluid retention, and mild hypertension that is not exacerbated when animals are treated with a high-K diet. These results show that the hypertension associated with BKβ1-KO occurs because of enhanced fluid retention, as well as because of the previously described vascular dysfunction.
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Affiliation(s)
- P Richard Grimm
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Hypertension of Kcnmb1-/- is linked to deficient K secretion and aldosteronism. Proc Natl Acad Sci U S A 2009; 106:11800-5. [PMID: 19556540 DOI: 10.1073/pnas.0904635106] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Mice lacking the beta1-subunit (gene, Kcnmb1; protein, BK-beta1) of the large Ca-activated K channel (BK) are hypertensive. This phenotype is thought to result from diminished BK currents in vascular smooth muscle where BK-beta1 is an ancillary subunit. However, the beta1-subunit is also expressed in the renal connecting tubule (CNT), a segment of the aldosterone-sensitive distal nephron, where it associates with BK and facilitates K secretion. Because of the correlation between certain forms of hypertension and renal defects, particularly in the distal nephron, it was determined whether the hypertension of Kcnmb1(-/-) has a renal origin. We found that Kcnmb1(-/-) are hypertensive, volume expanded, and have reduced urinary K and Na clearances. These conditions are exacerbated when the animals are fed a high K diet (5% K; HK). Supplementing HK-fed Kcnmb1(-/-) with eplerenone (mineralocorticoid receptor antagonist) corrected the fluid imbalance and more than 70% of the hypertension. Finally, plasma [aldo] was elevated in Kcnmb1(-/-) under basal conditions (control diet, 0.6% K) and increased significantly more than wild type when fed the HK diet. We conclude that the majority of the hypertension of Kcnmb1(-/-) is due to aldosteronism, resulting from renal potassium retention and hyperkalemia.
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Suzuki S, Uchida D, Koide H, Suyama K, Shibata T, Yoshida T, Tanaka T, Noguchi Y, Saito Y, Tatsuno I. A possible association between aldosterone response to vasopressin and circadian change of aldosterone in the patients with aldosterone-producing adenoma. Peptides 2008; 29:2225-31. [PMID: 18838094 DOI: 10.1016/j.peptides.2008.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Revised: 09/04/2008] [Accepted: 09/08/2008] [Indexed: 11/28/2022]
Abstract
Vasopressin was reported to stimulate secretion of both cortisol and aldosterone through eutopic V1a receptors in adrenal gland. Recently, adrenal hyper-responsiveness of plasma cortisol to vasopressin with eutopic overexpession of V1a receptors has been reported in Cushing's syndrome, such as a majority of cases of ACTH-independent macronodular adrenal hyperplasia and some cases of Cushing's adenomas. There were a few reports regarding the aldosterone response to vasopressin in aldosterone-producing adenoma. The aim of our study was to investigate the aldosterone response to vasopressin and its pathophysiological roles in the patients with aldosterone-producing adenoma. Vasopressin-loading test was performed in 10 patients with aldosterone-producing adenoma, and in 16 patients with non-functioning adrenal tumors. The roles of the aldosterone response to vasopressin were analyzed in terms of hormonal secretion and the expression of V1a receptor mRNA on the operated adrenal gland in aldosterone-producing adenoma. We found that (1) a varying aldosterone response to vasopressin was observed, (2) absolute response of plasma aldosterone in aldosterone-producing adenoma was significantly higher than that in non-functioning tumor, (3) aldosterone response rate to vasopressin was significantly and negatively correlated with the decline rate (%) in plasma aldosterone from morning to evening in aldosterone-producing adenoma, (4) V1a receptor mRNA was expressed at various values in aldosterone-producing adenoma, and (5) surgical removal of aldosterone-producing adenoma eliminated the aldosterone response to vasopressin observed in patients with aldosterone-producing adenoma. These findings indicated that vasopressin might be involved in the coordination of aldosterone secretion through eutopic expression of V1a receptor in aldosterone-producing adenoma.
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Affiliation(s)
- Sawako Suzuki
- Department of Clinical Cell Biology, Graduate School of Medicine, Chiba University, Chiba, Japan
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Abstract
Hypertension with hypokalemia, metabolic alkalosis, and suppressed plasma renin activity defines mineralocorticoid hypertension. Mineralocorticoid hypertension is the consequence of an overactivity of the epithelial sodium channel expressed at the apical membrane of renal cells in the distal nephron. This is usually the case when the mineralocorticoid receptor is activated by its physiologic substrate aldosterone. The best known form of mineralocorticoid hypertension is an aldosterone-producing adrenal tumor leading to primary aldosteronism. Primary aldosteronism can also be caused by unilateral or bilateral adrenal hyperplasia and rarely adrenal carcinoma. Interestingly, most of the inherited monogenic disorders associated with hypertension involve an excessive activation of the mineralocorticoid axis. In some of these disorders, mineralocorticoid hypertension results from activation of the mineralocorticoid receptor by other steroids (cortisol, deoxycorticosterone), by primary activation of the receptor itself, or by constitutive overactivity of the renal epithelial sodium channel. The present review addresses the physiology and significance of the key players of the mineralocorticoid axis, placing emphasis on the conditions leading to mineralocorticoid hypertension.
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Affiliation(s)
- Paolo Ferrari
- Division of Nephrology and Hypertension, Inselspital, University of Berne, 3010 Berne, Switzerland
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Kater CE, Costa-Santos M. O espectro das síndromes de hipertensão esteróide na infância e adolescência. ACTA ACUST UNITED AC 2001. [DOI: 10.1590/s0004-27302001000100011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hipertensão arterial não é privilégio de adultos. Além de causas renais e vasculares, doenças adrenocorticais ou correlatas devem ser consideradas na investigação da criança e adolescente hipertensos. O receptor mineralocortidóide (MC) pode ser ativado tanto por MC típicos como pelo cortisol, e mesmo funcionar de maneira autônoma, decorrente de distúrbio nos canais de sódio. Assim, hiperatividade MC (hipertensão, hipocalemia e supressão de renina) pode resultar do excesso de: (1) aldosterona, (2) deoxicorticosterona (DOC) e (3) cortisol. O primeiro grupo, denominado hiperaldosteronismo primário (HAP), inclui o adenoma, o carcinoma e a hiperplasia produtora de aldosterona, além de causa familiares: HA supressível por dexametasona (ou tipo I) e o tipo II. O segundo grupo engloba os tumores produtores tanto de DOC, como de andrógenos ou estrógenos, e a produção de DOC secundária ao excesso de ACTH (síndrome de Cushing, hiperplasia adrenal congênita por deficiência de 11beta- e 17alfa-hidroxilases e síndrome de resistência periférica ao cortisol). Na síndrome do excesso aparente de MC, cortisol age como um MC graças à deficiência congênita ou à inibição (pelo alcaçuz) da enzima 11beta-hidroxisteróide desidrogenase, responsável pela oxidação do cortisol em cortisona. Sódio e fluidos podem ser absorvidos nos túbulos renais de forma inapropriada, tanto na síndrome de Liddle (mutações ativadoras do gene do canal epitelial de sódio) como na de Arnold-Healy-Gordon (onde a hiperreabsorção de cloretos e sódio no túbulo renal impede a excreção de H+ e K+, produzindo hipertensão com acidose e hipercalemia). Todo este espectro de doenças adrenais hipertensivas, apesar de pouco prevalentes, deve ser lembrado com possível causa da hipertensão que pode ocorrer na infância e adolescência.
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Affiliation(s)
- A Ganguly
- Medical Service, James A. Haley Veterans Affairs Hospital and University of South Florida College of Medicine, Tampa 33612, USA
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