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Mahbub MH, Yamaguchi N, Hase R, Takahashi H, Ishimaru Y, Watanabe R, Saito H, Shimokawa J, Yamamoto H, Kikuchi S, Tanabe T. Plasma Branched-Chain and Aromatic Amino Acids in Relation to Hypertension. Nutrients 2020; 12:nu12123791. [PMID: 33322015 PMCID: PMC7764357 DOI: 10.3390/nu12123791] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Findings of the available studies regarding the roles of branched-chain amino acids (BCAAs) and aromatic amino acids (AAAs) in hypertension are inconsistent, conflicting and inconclusive. The purpose of this study was to explore and clarify the existence of any relationships of individual BCAAs and AAAs with hypertension with adjustments for potential relevant confounders. A total of 2805 healthy controls and 2736 hypertensive patients were included in the current analysis. The associations between individual amino acids and hypertension were explored by logistic regression analyses adjusted for potential confounding variables. Among the investigated amino acids, only the BCAAs showed consistently significant positive associations with hypertension in the adjusted models (p-trend < 0.05 to 0.001). However, compared with the corresponding lowest quartile of individual BCAAs, the positive association with hypertension remained significant only in the highest quartile (p < 0.01 to 0.001). We confirmed in a relatively large cohort of subjects that BCAAs, not AAAs, demonstrated consistent positive associations with hypertension. The results display the promising potential for the use of BCAAs as relevant and accessible biomarkers, and provide perspectives on interventions directed towards the reduction in plasma BCAA levels in the prevention and management of hypertension.
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Affiliation(s)
- M. H. Mahbub
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
- Correspondence: ; Tel.: +81-836-22-2231
| | - Natsu Yamaguchi
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Ryosuke Hase
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Hidekazu Takahashi
- Department of Public Health, Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794-8555, Japan;
| | - Yasutaka Ishimaru
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Rie Watanabe
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Hiroyuki Saito
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Junki Shimokawa
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
| | - Hiroshi Yamamoto
- Institute for Innovation, Ajinomoto Co. Inc., Kawasaki, Kanagawa 210-8681, Japan; (H.Y.); (S.K.)
| | - Shinya Kikuchi
- Institute for Innovation, Ajinomoto Co. Inc., Kawasaki, Kanagawa 210-8681, Japan; (H.Y.); (S.K.)
| | - Tsuyoshi Tanabe
- Department of Public Health and Preventive Medicine, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi 755-8505, Japan; (N.Y.); (R.H.); (Y.I.); (R.W.); (H.S.); (J.S.); (T.T.)
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Relationship of reduced glomerular filtration rate with alterations in plasma free amino acids and uric acid evaluated in healthy control and hypertensive subjects. Sci Rep 2019; 9:10252. [PMID: 31311955 PMCID: PMC6635408 DOI: 10.1038/s41598-019-46598-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 07/02/2019] [Indexed: 12/22/2022] Open
Abstract
The potential association between altered levels of plasma free amino acids (PFAAs) and uric acid (UA) with estimated glomerular filtration rate (eGFR) remains unknown among patients with hypertension. A total of 2804 healthy controls and 2455 hypertensive patients were included in the current analysis. eGFR was defined as reduced when it was <60 ml/min/1.73 m2. The associations between reduced eGFR and individual PFAAs and UA in the healthy control and hypertension groups were explored by logistic regression analyses adjusted for potential confounding variables. Results show that UA had a significant positive association with reduced eGFR in both healthy control and hypertension groups (P < 0.001). Among the PFAAs, citrulline, glycine and phenylalanine showed significant positive associations with reduced eGFR in both healthy control (P < 0.01 to 0.001) and hypertension (P < 0.001) groups. Moreover, alanine, asparagine and methionine achieved significant positive associations with reduced eGFR only in the hypertension group (P < 0.01 to 0.001). Conversely, serine showed significant inverse associations with reduced eGFR in the hypertension group only (P < 0.001). Our findings provide first evidence for a strong relationship between distinct patterns of PFAAs and elevated UA with reduced eGFR in hypertension. The findings may appear useful in developing effective strategies for the prevention or early detection and treatment of declined kidney function in hypertension.
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Tayebati SK, Tomassoni D, Amenta F. Spontaneously hypertensive rat as a model of vascular brain disorder: microanatomy, neurochemistry and behavior. J Neurol Sci 2012; 322:241-9. [PMID: 22726353 DOI: 10.1016/j.jns.2012.05.047] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 05/23/2012] [Indexed: 11/28/2022]
Abstract
Arterial hypertension is the main risk factor for stroke and plays a role in the development of vascular cognitive impairment (VCI) and vascular dementia (VaD). An association between hypertension and reduced cerebral blood flow and VCI is documented and arterial hypertension in midlife is associated with a higher probability of cognitive impairment. These findings suggest that arterial hypertension is a main cause of vascular brain disorder (VBD). Spontaneously hypertensive rat (SHR) is the rat strain most extensively investigated and used for assessing hypertensive brain damage and treatment of it. They are normotensive at birth and at 6months they have a sustained hypertension. Time-dependent rise of arterial blood pressure, the occurrence of brain atrophy, loss of nerve cells and glial reaction are phenomena shared to some extent with hypertensive brain damage in humans. SHR present changes of some neurotransmitter systems that may have functional and behavioral relevance. An impaired cholinergic neurotransmission characterizes SHR, similarly as reported in patients affected by VaD. SHR are also characterized by a dopaminergic hypofunction and noradrenergic hyperactivity similarly as occurs in attention-deficit with hyperactivity disorder (ADHD). Microanatomical, neurochemical and behavioral data on SHR are in favor of the hypothesis that this strain is a suitable model of VBD. Changes in catecholaminergic transmission put forward SHR as a possible model of ADHD as well. Hence SHR could represent a multi-faced model of two important groups of pathologies, VBD and ADHD. As for most models, researchers should always consider that SHR offer some similarities with corresponding human pathologies, but they do not suffer from the same disease. This paper reviews the main microanatomical, neurochemical and behavioral characteristics of SHR with particular reference as an animal model of brain vascular injury.
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Affiliation(s)
- Seyed Khosrow Tayebati
- School of Medicinal Sciences and Health Products, University of Camerino, Camerino, Italy.
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Antonicelli R, Gesuita R, Amadio L, Paciaroni E. Isolated systolic hypertension in the elderly: Results of the camerano study on hypertension. Int J Angiol 2011. [DOI: 10.1007/bf02651567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Abstract
A substantial portion of elderly people experience declines in mental capacities. While these changes are often attributable to serious dementing illnesses such as Alzheimer's disease, a surprising number result from apparently normal aging processes. The effects of senescence on cognition may be indirect (i.e., gait instability leading to falling and subsequent head trauma); however, they may have a more direct and subtle impact on the brain. The evidence available to date suggests that only a limited range of cognitive domains are susceptible to these aging effects. Perhaps the most important are short-term memory functions. The specific character of these and other age-related cognitive deficits are reviewed.
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Affiliation(s)
- R W Keefover
- Department of Neurology, West Virginia University School of Medicine, Morgantown, West Virginia 26506-9180, USA
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Meneses A, Terrón JA, Ibarra M, Hong E. Effects of nimodipine on learning in normotensive and spontaneously hypertensive rats. Behav Brain Res 1997; 85:121-5. [PMID: 9095346 DOI: 10.1016/s0166-4328(97)87580-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
It is well known that the calcium channel blocker, nimodipine, has beneficial effects on learning in either aged or hypertensive animals and humans. However, no attempts have been made to investigate if nimodipine can reverse the synergistic deleterious effects of aging and hypertension in the same subject. Therefore, this study investigated the effects of stable infusions of nimodipine in the autoshaping learning task using middle-aged normotensive (WKY) and hypertensive (SHR) rats. WKY and SHR of 12 months of age were implanted with osmotic minipumps releasing either vehicle or nimodipine (0.4 mg/kg/day). After 3 weeks of treatment, the animals received autoshaping training sessions during 4 consecutive days. The WKY animals treated with nimodipine exhibited the highest levels of learning during the last session, the rank order being WKY-nimodipine > SHR-nimodipine > WKY-vehicle > SHR-vehicle. These results confirm that nimodipine can reverse the impairing effects of either aging or hypertension on learning; the presence of both conditions, however, might produce more severe dysfunctional changes that cannot be totally reversed by nimodipine.
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Affiliation(s)
- A Meneses
- Departamento de Farmacología y Toxicología, Mexico, D.F., Mexico
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Meneses A, Castillo C, Ibarra M, Hong E. Effects of aging and hypertension on learning, memory, and activity in rats. Physiol Behav 1996. [DOI: 10.1016/s0031-9384(96)80002-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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