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Miao T, Yu J, Shen Q, Feng G, Ding H, Gao Y, Shen S, Zang Y, Chen X, Zheng X. Grip strength affects the association between platelet count and disability-free survival: Evidence from the China Health and Retirement Longitudinal Study. Arch Gerontol Geriatr 2023; 112:105026. [PMID: 37062186 DOI: 10.1016/j.archger.2023.105026] [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: 02/28/2023] [Revised: 04/01/2023] [Accepted: 04/10/2023] [Indexed: 04/18/2023]
Abstract
BACKGROUND AND AIMS Previous studies found elevated platelet count (PLT), especially long-term persist high or increased PLT was associated with less likelihood disability-free survival (DFS). However, whether grip strength affects the relationship between them is still not elucidated. METHODS A total of 6252 participants were recruited in the analysis based on the China Health and Retirement Longitudinal Study. The primary outcome was DFS, evaluated by a composite endpoint based on the first occurrence of either disability (having difficulty in at least one of the 6 activities of daily living: namely, dressing, bathing, continence, eating, getting into or out of bed, and toileting) or all-cause mortality. RESULTS The association of PLT with primary outcome was significantly modified by grip strength (pinteraction = 0.022). The rates of primary outcome were significantly lower among participants with lower baseline PLT in participants with normal grip strength (multivariable odds ratio [OR], 0.67; 95% confidence interval [CI], 0.54-0.84; ptrend < 0.001), but not in those with low grip strength (multivariable OR, 1.70; 95% CI, 0.88-3.15; ptrend = 0.135), for the lowest quartile vs the highest quartile. Adding baseline PLT (quartiles or continuous) to a model containing conventional risk factors significantly improved risk reclassification for primary outcome among those with normal grip strength (most of p < 0.05). CONCLUSION An inverse dose-response association of PLT with DFS was found among participants with normal grip strength, but not among those with low grip strength. Low grip strength might weaken the benefit of low PLT on DFS among middle-aged and older Chinese.
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Affiliation(s)
- Tongtong Miao
- Department of Pharmacy, Nantong First People's Hospital, Second Affiliated Hospital of Nantong University, 666 Shengli Road, Chongchuan District, Nantong, Jiangsu Province 226006, China
| | - Jia Yu
- Department of Acute Infectious Disease Control and Immunization Program, Wuzhong Center for Disease Control and Prevention, Suzhou, Jiangsu 215000, China
| | - Qian Shen
- Department of Chronic Non-Communicable Disease Control, The Affiliated Wuxi Center for Disease Control and Prevention of Nanjing Medical University, Wuxi Center for Disease Control and Prevention, Wuxi, Jiangsu 214023, China
| | - Guijuan Feng
- The First Affiliated Hospital of Kangda College of Nanjing Medical University, The Affiliated Lianyungang Hospital of Xuzhou Medical University, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu 222000, China
| | - Huan Ding
- Department of Chronic Infectious Disease Control, The Affiliated Wuxi Center for Disease Control and Prevention of Nanjing Medical University, Wuxi Center for Disease Control and Prevention, Wuxi, Jiangsu 214023, China
| | - Yumeng Gao
- Department of Acute Infectious Disease Control, The Affiliated Wuxi Center for Disease Control and Prevention of Nanjing Medical University, Wuxi Center for Disease Control and Prevention, Wuxi, Jiangsu 214023, China
| | - Suwen Shen
- Department of Chronic Non-Communicable Disease Control, The Affiliated Wuxi Center for Disease Control and Prevention of Nanjing Medical University, Wuxi Center for Disease Control and Prevention, Wuxi, Jiangsu 214023, China.
| | - Yuhan Zang
- Department of Health Promotion and Chronic Non-Communicable Disease Control, Wuzhong Center for Disease Control and Prevention, 269 Taihu West Road, Wuzhong District, Suzhou, Jiangsu Province 215000, China.
| | - Xia Chen
- Department of Pharmacy, Nantong First People's Hospital, Second Affiliated Hospital of Nantong University, 666 Shengli Road, Chongchuan District, Nantong, Jiangsu Province 226006, China.
| | - Xiaowei Zheng
- Public Health Research Center and Department of Public Health and Preventive Medicine, Wuxi School of Medicine Jiangnan University, 1800 Lihu Road, Binhu District, Wuxi, Jiangsu Province 214122, China.
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Low-Density Lipoprotein Cholesterol, Structural Atherosclerosis, and Functional Atherosclerosis in Older Japanese. Nutrients 2022; 15:nu15010183. [PMID: 36615839 PMCID: PMC9824696 DOI: 10.3390/nu15010183] [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: 12/03/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 01/04/2023] Open
Abstract
Aggressive endothelial repair results in the progression of both structural and functional atherosclerosis, while insufficient endothelial repair worsens functional but not structural atherosclerosis. Aging increases the risk of inadequate endothelial repair. Since low-density lipoprotein cholesterol (LDLc) activates endothelial repair, LDLc may be positively associated with structural atherosclerosis but inversely associated with functional atherosclerosis in older individuals. This cross-sectional study analyzed 1458 participants aged 60 to 79 years. We defined structural atherosclerosis as a carotid intima-media thickness (CIMT) of at least 1.1 mm and functional atherosclerosis as a cardio-ankle vascular index (CAVI) of at least 9.0. LDLc was significantly positively associated with structural atherosclerosis and significantly inversely associated with functional atherosclerosis, independently of known cardiovascular risk factors. For 1 standard increment of LDLc (28 mg/dL for men and 29 mg/dL for women), the odds ratios and 95% confidence intervals after adjustment for known cardiovascular risk factors were 1.28 (1.10, 1.50) for structural atherosclerosis and 0.85 (0.75, 0.96) for functional atherosclerosis. LDLc activates endothelial repair, which results in the development of structural atherosclerosis but maintains endothelial function in older individuals. To evaluate atherosclerosis in clinical practice, the combination of structural and functional assessment of atherosclerosis could be informative.
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Tooth Loss and Carotid Intima-Media Thickness in Relation to Functional Atherosclerosis: A Cross-Sectional Study. J Clin Med 2022; 11:jcm11143993. [PMID: 35887757 PMCID: PMC9317227 DOI: 10.3390/jcm11143993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 01/27/2023] Open
Abstract
Structural arterial stiffness can be evaluated with carotid intima-media thickness (CIMT). Functional arterial stiffness can be evaluated with cardio-ankle vascular index (CAVI). A positive association between CIMT and tooth loss has been reported, but no studies have evaluated the association between CIMT and tooth loss in relation to functional arterial stiffness (functional atherosclerosis). A cross-sectional study of 1235 Japanese individuals aged 40–89 years was conducted. Tooth loss was defined as being in the lowest tertile for the number of remaining teeth (≤20 in men and ≤19 in women). Functional atherosclerosis was defined as CAVI ≥ 9.0. Independent of known confounding factors, CIMT was positively associated with tooth loss only in participants without functional atherosclerosis. Adjusted odds ratios for tooth loss and a 1 standard deviation increment in CIMT were 1.27 (1.04–1.55) for participants without functional atherosclerosis and 0.99 (0.77–1.26) for participants with functional atherosclerosis. CIMT and functional atherosclerosis had a significant effect on tooth loss; the fully adjusted p-value for the interaction on tooth loss was 0.019. Independent of known confounding factors, CIMT is positively associated with tooth loss only in participants without functional atherosclerosis. This finding helps clarify the influence of the progression of arterial stiffness on tooth loss because the progression of structural atherosclerosis might have a beneficial influence on the maintenance of the microcirculation.
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Shimizu Y, Arima K, Noguchi Y, Yamanashi H, Kawashiri SY, Nobusue K, Nonaka F, Aoyagi K, Nagata Y, Maeda T. Vascular endothelial growth factor (VEGF) polymorphism rs3025039 and atherosclerosis among older with hypertension. Sci Rep 2022; 12:5564. [PMID: 35365727 PMCID: PMC8976085 DOI: 10.1038/s41598-022-09486-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 03/09/2022] [Indexed: 01/09/2023] Open
Abstract
Angiogenesis inhibition therapy causes hypertension by increasing peripheral vascular resistance. Vasa vasorum angiogenesis plays a crucial role in the development of atherosclerosis. Since vascular endothelial growth factor (VEGF), which contributes to the progress of angiogenesis, is reported to be inversely associated with the minor allele of polymorphism rs3025039, the minor allele of rs3025039 could be inversely associated with atherosclerosis among individuals with hypertension. A cross-sectional study of 1793 older Japanese adults aged 60–89 years with hypertension who participated in general health check-ups was conducted. Atherosclerosis was defined as carotid intima-media thickness (CIMT) ≥ 1.1 mm. The minor allele of polymorphism rs3025020 was positively associated with VEGF. Therefore, in addition to known cardiovascular risk factors, rs3025020 genotype acted as a confounding factor in the present study. Independent of known confounding factors, the minor allele of rs3025039 was inversely associated with atherosclerosis among older Japanese adults with hypertension. The fully adjusted odds ratio (OR) and 95% confidence interval (CI) for atherosclerosis with the minor allele of rs3025039 was 0.78 (0.64, 0.96). The angiogenesis-related polymorphism rs3025039 was associated with the development of atherosclerosis among older Japanese individuals. This study indicates that the development of atherosclerosis among older individuals might partly indicate a capacity for angiogenesis.
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Affiliation(s)
- Yuji Shimizu
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Diseases Prevention, Osaka, Japan.
| | - Kazuhiko Arima
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yuko Noguchi
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hirotomo Yamanashi
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shin-Ya Kawashiri
- Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kenichi Nobusue
- Department of Islands and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Fumiaki Nonaka
- Department of Islands and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kiyoshi Aoyagi
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasuhiro Nagata
- Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takahiro Maeda
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Leading Medical Research Core Unit, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Islands and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Shimizu Y, Kawashiri SY, Nobusue K, Yamanashi H, Nagata Y, Maeda T. Associations between handgrip strength and hypertension in relation to circulating CD34-positive cell levels among Japanese older men: a cross-sectional study. Environ Health Prev Med 2021; 26:62. [PMID: 34088260 PMCID: PMC8178925 DOI: 10.1186/s12199-021-00982-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/14/2021] [Indexed: 01/09/2023] Open
Abstract
Background A positive association between handgrip strength and blood pressure has been reported. Since these factors are linked to the condition of the endothelium, the activity of endothelial repair might influence the association between handgrip strength and hypertension. Methods A cross-sectional study was conducted with 257 Japanese men aged 60–69 years who underwent an annual health checkup. As individuals with high level of circulating CD34-positive cells might show active endothelial repair, which plays an important role in vascular homeostasis, participants were stratified by circulating CD34-positive cell levels, using the median value of this population (0.96 cells/μL) as the cutoff. Results Independent of known cardiovascular risk factors, for participants with a high CD34-positive cell, handgrip strength is significantly positively associated with hypertension (odds ratio and 95% confidence interval of hypertension for 1 standard deviation increment of handgrip strength were 1.85 (1.19, 2.88) but not for participants with a low CD34-positive cell (0.91 (0.61, 1.37)). Conclusion The positive association between handgrip strength and hypertension is limited to high CD34-positive cells. This result may help clarify the role of vascular homeostasis in maintaining muscle strength.
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Affiliation(s)
- Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Diseases Prevention, Osaka, Japan.
| | - Shin-Ya Kawashiri
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Kenichi Nobusue
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hirotomo Yamanashi
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasuhiro Nagata
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan
| | - Takahiro Maeda
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Shimizu Y, Maeda T. Influence of height on endothelial maintenance activity: a narrative review. Environ Health Prev Med 2021; 26:19. [PMID: 33549053 PMCID: PMC7866474 DOI: 10.1186/s12199-021-00941-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 01/24/2021] [Indexed: 12/25/2022] Open
Abstract
Recent studies have revealed an inverse association between height and cardiovascular disease. However, the background mechanism of this association has not yet been clarified. Height has also been reported to be positively associated with cancer. Therefore, well-known cardiovascular risk factors, such as increased oxidative stress and chronic inflammation, are not the best explanations for this inverse association because these risk factors are also related to cancer. However, impaired blood flow is the main pathological problem in cardiovascular disease, while glowing feeding vessels (angiogenesis) are the main characteristic of cancer pathologies. Therefore, endothelial maintenance activity, especially for the productivity of hematopoietic stem cells such as CD34-positive cells, could be associated with the height of an individual because this cell contributes not only to the progression of atherosclerosis but also to the development of angiogenesis. In addition, recent studies have also revealed a close connection between bone marrow activity and endothelial maintenance; bone marrow-derived hematopoietic stem cells contribute towards endothelial maintenance. Since the absolute volume of bone marrow is positively associated with height, height could influence endothelial maintenance activity. Based on these hypotheses, we performed several studies. The aim of this review is not only to discuss the association between height and bone marrow activity, but also to describe the potential mechanism underlying endothelial maintenance. In addition, this review also aims to explain some of the reasons that implicate hypertension as a major risk factor for stroke among the Japanese population. The review also aims to clarify the anthropological reasons behind the high risk of atherosclerosis progression in Japanese individuals with acquired genetic characteristics.
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Affiliation(s)
- Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki-shi, Sakamoto 1-12-4, Nagasaki, 852-8523, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Diseases Prevention, Osaka, Japan.
| | - Takahiro Maeda
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Association between serum sodium level within normal range and handgrip strength in relation to hypertension status: a cross-sectional study. Sci Rep 2021; 11:1088. [PMID: 33441779 PMCID: PMC7806731 DOI: 10.1038/s41598-020-80163-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 12/16/2020] [Indexed: 11/26/2022] Open
Abstract
Serum sodium concentration within the normal range could act as an indicator of age-related changes such as decrease in muscle strength and impairment of capillary function. Since endothelial injury stimulates endothelial repair by enhancing CD34-positive cell production, the level of serum sodium may be inversely associated with that of circulating CD34-positive cells, thus indicating the degree of age-related endothelial injury. We conducted a cross-sectional study of 246 elderly Japanese men aged 60–69 years. Subjects were stratified by hypertension status because hypertension should act as a strong confounding factor for the analyses performed in this study. Serum sodium concentration was positively associated with handgrip strength in non-hypertensive subjects [standardized parameter estimate (β) = 0.29; p = 0.003], but not for hypertensive subjects (β = 0.01; p = 0.878), while it was inversely associated with circulating CD34-positive cell levels in non-hypertensive subjects [simple correlation coefficient (r) = − 0.28; p = 0.002] but not for hypertensive subjects (r = − 0.07; p = 0.454). For non-hypertensive elderly subjects, serum sodium concentration within the normal range is positively associated with handgrip strength and inversely associated with CD34-positive cells, thus partly indicating the degree of age-related endothelium injury. These associations could prove to be an efficient tool for clarifying the background mechanism governing the decrease in age-related muscle strength.
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Sarcopenia, sarcopenic overweight/obesity and risk of cardiovascular disease and cardiac arrhythmia: A cross-sectional study. Clin Nutr 2020; 40:571-580. [PMID: 32593523 DOI: 10.1016/j.clnu.2020.06.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Sarcopenia is an age-dependent skeletal muscle disorder that is common in patients with heart failure. The current study aimed to investigate the associations of sarcopenia with carotid atherosclerosis, cardiovascular disease and cardiac arrhythmia in a middle-aged and elderly population without clinical heart failure. METHODS A total of 2432 participants (992 men and 1440 women) from Shanghai Changfeng Study were included for analysis. The degree of sarcopenia was measured using height-adjusted appendicular skeletal muscle mass (ASM/height2). Carotid plaques were detected by carotid artery ultrasonography, and myocardial ischemia, infarction and cardiac arrhythmia were diagnosed based on electrocardiogram, past history and clinical manifestations. RESULTS Sarcopenia was associated with higher prevalence of carotid atherosclerosis (26.4% vs 20.4%, P = 0.027), myocardial infarction (4.0% vs 1.1%, P = 0.001), and premature ventricular contraction (4.0% vs 2.0%, P = 0.034) in the participants with normal body weight, and higher prevalence of carotid atherosclerosis (45.0% vs 31.2%, P = 0.016), myocardial infarction (10.0% vs 4.3%, P = 0.020) and atrial fibrillation (7.5% vs 1.3%, P < 0.001) in those with overweight/obese status. After adjustment for age, gender, cigarette smoking, alcohol drinking, menopausal status in women and other metabolic and inflammatory confounding factors, sarcopenia was independently associated with the risk of myocardial infarction in the whole population, and the risk of atrial fibrillation in the overweight/obese participants (all P < 0.05). Compared with nonsarcopenic lean participants, the risk of myocardial infarction was gradually increased in sarcopenic lean (OR 3.08 [1.28-7.45], P = 0.012) and sarcopenic overweight/obese participants (OR 4.07 [1.31-12.62], P = 0.015). For the atrial fibrillation, the participants with either sarcopenia or overweight/obesity alone showed no higher risk. However, concomitant sarcopenia and overweight/obesity was associated with approximately 5-fold risk of atrial fibrillation (OR 5.68 [1.34-24.12], P = 0.019) after multiple adjustment. CONCLUSION Sarcopenia is associated with myocardial infarction and atrial fibrillation in middle-aged and elderly adults without clinical heart failure.
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Shimizu Y, Kawashiri SY, Kiyoura K, Koyamatsu J, Fukui S, Tamai M, Nobusue K, Yamanashi H, Nagata Y, Maeda T. Circulating CD34+ cells and active arterial wall thickening among elderly men: A prospective study. Sci Rep 2020; 10:4656. [PMID: 32170211 PMCID: PMC7069955 DOI: 10.1038/s41598-020-61475-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 02/12/2020] [Indexed: 11/10/2022] Open
Abstract
Age-related physical changes, such as low-grade inflammation and increased oxidative stress, induce endothelial repair and cause active arterial wall thickening by stimulating the production of CD34+ cells (the principal mediators of atherosclerosis). Despite this, aggressive endothelial repair (progressing atherosclerosis) might cause a wasting reduction in CD34+ cells, which could result in a lower capacity of endothelial repair and hypertension. As yet, no prospective study has clarified the association of circulating CD34+ cells with active arterial wall thickening. We conducted a prospective study of 363 men aged 60-69 years who participated in a general health check-up at least twice from 2014-2017. The circulating CD34+ cell count was significantly positively associated with active arterial wall thickening among subjects without hypertension (n = 236), but not among subjects with hypertension (n = 127). The fully adjusted odds ratios (ORs) of active arterial wall thickening for the logarithmic circulating CD34+ cell count were 1.83 (1.19, 2.84) and 0.69 (0.36, 1.32) for subjects without and with hypertension, respectively. Circulating CD34+ cells are positively associated with active arterial wall thickening in subjects without hypertension. This study demonstrates a means to clarify the mechanisms of endothelial repair in elderly subjects.
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Affiliation(s)
- Yuji Shimizu
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. .,Department of Cardiovascular Disease Prevention, Osaka Center for Cancer and Cardiovascular Disease Prevention, Osaka, Japan.
| | - Shin-Ya Kawashiri
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kairi Kiyoura
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Jun Koyamatsu
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Shoichi Fukui
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Mami Tamai
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Kenichi Nobusue
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hirotomo Yamanashi
- Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yasuhiro Nagata
- Center for Comprehensive Community Care Education, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Takahiro Maeda
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.,Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Insulin-Like Growth Factor-1 (IGF-1) and Reduced Tongue Pressure in Relation to Atherosclerosis Among Community-Dwelling Elderly Japanese Men: A Cross-Sectional Study. Dysphagia 2020; 35:948-954. [PMID: 32157395 DOI: 10.1007/s00455-020-10096-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 02/17/2020] [Indexed: 10/24/2022]
Abstract
Even though higher serum insulin-like growth factor-1 (IGF-1) levels have a positive effect on preventing reduction in muscle strength, a U-shaped association between IGF-1 and mortality has been reported. Since a recent experimental study revealed that IGF-1 is associated with atherosclerotic lesion formation, the inflammatory status of atherosclerosis could act as a confounding factor on the association between IGF-1 levels and reduced muscle strength. This study aimed to clarify the atherosclerosis-specific association between IGF-1 levels and reduced muscle strength. We conducted a cross-sectional study of 410 elderly men aged 60-89 years. Since a reduction in maximum voluntary tongue pressure against the palate (MTP) is reportedly associated with sarcopenia, we evaluated muscle strength by using MTP and defined reduced MTP as the lowest tertiles of the study population. Among study population, 295 showed no atherosclerosis (carotid intima-media thickness < 1.1 mm). Even though a significant inverse association between IGF-1 and reduced MTP was observed for subjects without atherosclerosis, no such association was detected for subjects with atherosclerosis. The known cardiovascular risk-factor adjusted odds ratio (OR) of a one-standard deviation (SD) increment (28.1 ng/mL) of IGF-1 for reduced MTP was 0.69 (0.51, 0.95) for subjects without atherosclerosis and 1.93 (1.05, 3.52) for subjects with atherosclerosis. IGF-1 was found to be inversely associated with a reduced MTP among elderly men without atherosclerosis but not among those with atherosclerosis. Atherosclerosis can thus act as a powerful confounding factor on the association between IGF-1 levels and a reduced MTP.
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Yano J, Yamamoto-Shimizu S, Yokoyama T, Kumakura I, Hanayama K, Tsubahara A. Effects of anterior tongue strengthening exercises on posterior tongue strength in healthy young adults. Arch Oral Biol 2019; 98:238-242. [DOI: 10.1016/j.archoralbio.2018.11.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/21/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022]
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