Michiya Igase

ORCID: 0000-0003-2545-4124
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About
Contact & Profiles
Research Areas
  • Cardiovascular Health and Disease Prevention
  • Nutrition and Health in Aging
  • Cerebrovascular and Carotid Artery Diseases
  • Genetic Associations and Epidemiology
  • Blood Pressure and Hypertension Studies
  • Adipokines, Inflammation, and Metabolic Diseases
  • Nutritional Studies and Diet
  • Cardiovascular Disease and Adiposity
  • Body Composition Measurement Techniques
  • Heart Rate Variability and Autonomic Control
  • Cancer-related molecular mechanisms research
  • Cardiovascular Syncope and Autonomic Disorders
  • Dementia and Cognitive Impairment Research
  • Hormonal Regulation and Hypertension
  • Frailty in Older Adults
  • Regulation of Appetite and Obesity
  • Advanced Glycation End Products research
  • Acute Ischemic Stroke Management
  • Renin-Angiotensin System Studies
  • Atherosclerosis and Cardiovascular Diseases
  • Medical Imaging and Pathology Studies
  • Neurological Disease Mechanisms and Treatments
  • Intracranial Aneurysms: Treatment and Complications
  • Liver Disease Diagnosis and Treatment
  • Fibroblast Growth Factor Research

Ehime University
2016-2025

University of Oxford
2023

Nagoya University
2023

Center for Environmental Health
2023

Population Health Research Institute
2023

Hamilton Health Sciences
2023

McMaster University
2023

National University Health System
2023

University Medical Center Utrecht
2017

Jikei University School of Medicine
2017

To develop a risk score that estimates 3-year and 5-year absolute risks for aneurysm growth.From 10 cohorts of patients with unruptured intracranial aneurysms follow-up imaging, we pooled individual data on sex, population, age, hypertension, history subarachnoid hemorrhage, location, size, aspect ratio, shape but not smoking during family in 1,507 1,909 used growth as outcome. With aneurysm-based multivariable Cox regression analysis, determined predictors growth, which were presented to...

10.1212/wnl.0000000000003865 article EN Neurology 2017-04-01

When increased in vascular tissues, angiotensin-converting enzyme 2 (ACE2), a carboxypeptidase that hydrolyzes angiotensin II to angiotensin-(1-7), may augment the growth inhibitory and vasodilatory effects of heptapeptide. We investigated regulation ACE2 angiotensin-(1-7) expression aortas carotid arteries 12-wk-old male spontaneously hypertensive rats (SHR) by determining effect sustained type 1 (AT(1)) receptor blockade with olmesartan (10 mg.kg(-1).day(-1), n = 13) compared those...

10.1152/ajpheart.00068.2005 article EN AJP Heart and Circulatory Physiology 2005-04-16
Fumihiko Takeuchi Masato Akiyama Nana Matoba Tomohiro Katsuya Masahiro Nakatochi and 95 more Yasuharu Tabara Akira Narita Woei‐Yuh Saw Sanghoon Moon Cassandra N. Spracklen Jin Fang Chai Young‐Jin Kim Liang Zhang Chaolong Wang Huaixing Li Honglan Li Jer‐Yuarn Wu Rajkumar Dorajoo Jovia L. Nierenberg Ya Xing Wang Jing He Derrick Bennett Atsushi Takahashi Yukihide Momozawa Makoto Hirata Koichi Matsuda Hiromi Rakugi Eitaro Nakashima Masato Isono Matsuyuki Shirota Atsushi Hozawa Sahoko Ichihara Tatsuaki Matsubara Ken Yamamoto Katsuhiko Kohara Michiya Igase Sohee Han Penny Gordon‐Larsen Wei Huang Sang Lee Linda S. Adair Mi Yeong Hwang Juyoung Lee Miao Li Chee Charumathi Sabanayagam Wanting Zhao Jianjun Liu Dermot F. Reilly Liang Sun Shaofeng Huo Todd L. Edwards Jirong Long Li-Ching Chang Chien-Hsiun Chen Jian‐Min Yuan Woon‐Puay Koh Yechiel Friedlander Tanika N. Kelly Wen Bin Wei Liang Xu Hui Cai Yong‐Bing Xiang Kuang Lin Robert Clarke Robin Walters Iona Y. Millwood Liming Li John C. Chambers Jaspal S. Kooner Paul Elliott Pim van der Harst Marie Loh Niek Verweij Weihua Zhang Benjamin Lehne Irene Mateo Leach Alexander Drong James Abbott Han Sun William R. Scott Gianluca Campanella Marc Chadeau‐Hyam Uzma Afzal Tõnu Esko Sarah E. Harris Jaana Hartiala Marcus E. Kleber Richa Saxena Alexandre F.R. Stewart Tarunveer S. Ahluwalia Imke Aits Alexessander Couto Alves Shikta Das Jemma C. Hopewell Robert W. Koivula Leo‐Pekka Lyytikäinen Iris Postmus Olli Raitakari Robert A. Scott Rossella Sorice

Abstract Blood pressure (BP) is a major risk factor for cardiovascular disease and more than 200 genetic loci associated with BP are known. Here, we perform multi-stage genome-wide association study (max N = 289,038) principally in East Asians meta-analysis Europeans. We report 19 new ancestry-specific variants, conforming to common variant model. At 10 unique loci, distinct non-rare variants colocalize within the same linkage disequilibrium block despite significantly discordant effects...

10.1038/s41467-018-07345-0 article EN cc-by Nature Communications 2018-11-22

The combination of sarcopenia, age-related loss muscle strength and mass, obesity has been recognized as a new category among the elderly. Given that leptin hypothesized to be involved in pathogenesis sarcopenic obesity, we investigated relationship between plasma levels thigh sarcopenia visceral obesity. Thigh cross-sectional area (CSA) fat were measured using computed tomography indices for mass fat, respectively, 782 middle-aged elderly subjects (303 men 479 women), participating medical...

10.1371/journal.pone.0024633 article EN cc-by PLoS ONE 2011-09-09

Abstract Background There is a close association between frailty and cognitive impairment. However, the underlying contribution of sarcopenia to development impairment unclear. We investigated possible muscle mass decline in cross‐sectional study 1518 subjects aged 55 years or above. also evaluated arterial stiffness white matter hyperintensities (WMHs) as mechanisms for this association. Methods Two sarcopenic indices were measured: thigh area (CSA; calculated by computed tomography)...

10.1002/jcsm.12195 article EN cc-by-nc-nd Journal of Cachexia Sarcopenia and Muscle 2017-03-29

Endothelin-1 (ET-1) is a powerful vasoconstrictor peptide produced by endothelial and smooth muscle cells. Many lines of biological evidence suggest that the ET-1 gene candidate for hypertension. Moreover, recent association studies suggested G/T polymorphism with an amino acid substitution (Lys/Asn) at codon 198 in exon 5 interacts body mass index (BMI) blood pressure. They T carriers are more sensitive to weight gain than GG homozygotes However, often irreproducible, first study suggests...

10.1161/01.hyp.0000043680.75107.cf article EN Hypertension 2003-01-01

Abstract —To elucidate the relationship between postprandial hypotension (PPH) and asymptomatic cerebrovascular damage, we evaluated changes in blood pressure after a meal by 24-hour monitoring 70 hospitalized essential hypertensive patients aged ≥50 years. They received diet containing standard nutritional ingredients with 120 mmol (7 g) NaCl were free from medication for at least 1 week. PPH was defined as mean reduction of systolic during 2 hours meal. Patients divided into three groups...

10.1161/01.hyp.33.1.565 article EN Hypertension 1999-01-01

Aim: Aging shifts body composition to comprising more fat and less muscle. Sarcopenia, particularly in the knee extensors, obesity, visceral either alone or combination, may exacerbate age‐related physical disability. We investigated association between quadriceps (Qc) sarcopenia as measured by cross‐sectional area (CSA), on postural instability. Methods: Mid‐thigh muscle CSA abdominal subcutaneous at level of umbilicus were assessed from computed tomography (CT) images 410 apparently...

10.1111/j.1447-0594.2010.00610.x article EN Geriatrics and gerontology international/Geriatrics & gerontology international 2010-02-19

<i>Background/Aims:</i> Mobility impairment in older adults has been suggested to be a marker of subclinical structural and functional brain abnormalities. We investigated possible association between static postural instability abnormalities cognitive decline. <i>Methods:</i> The study subjects were 390 community residents without definitive dementia (67 ± 7 years old) 21 patients with Alzheimer’s disease (AD). Brain atrophy was measured by MRI....

10.1159/000255106 article EN Dementia and Geriatric Cognitive Disorders 2010-01-01

<i>Background/Aim:</i> Lower body weight in later life has been shown to be associated with dementia. However, abdominal fat distribution under conditions of mild cognitive impairment (MCI) and the possible involvement leptin adiponectin MCI have not fully investigated. <i>Methods:</i> We analyzed 517 middle-aged-to-elderly community-dwelling persons. Abdominal subcutaneous visceral areas were determined using computed tomography, plasma concentrations measured...

10.1159/000321985 article EN Dementia and Geriatric Cognitive Disorders 2010-01-01

Variants in the CDH13 gene have been identified as determinants of blood levels adiponectin, an insulin-sensitizing adipokine. However, their association with other metabolic risk factors remains unclear. We examined variants at relation to total and high-molecular-weight (HMW) adiponectin using data from a genome-wide study performed 2,434 Singaporean Chinese replication up 3,290 Japanese 1,610 Koreans. The top signal rs4783244 showed strong associations (standardized β [β] = -0.34, 95% CI...

10.2337/db13-0129 article EN cc-by-nc-nd Diabetes 2013-09-06

Hypertension (HT) and dementia are common disorders in the elderly. HT elderly is associated with increased occurrence rates of including Alzheimer's disease (AD) vascular (VaD). In connection to this, some studies have suggested that old age correlates pathogenesis dementia. Since potentially reversible, a number randomized trials examined whether antihypertensive treatment may help preventing occurrence. We review five studies, all using subjects 60 years or older, which investigated...

10.1155/2012/320648 article EN cc-by International Journal of Hypertension 2011-11-03

Objective: Increasing blood pressure (BP) variability is reported to be a cardiovascular risk factor. However, the clinical implications of postprandial hypotension (PHYPO), commonly observed BP in elderly persons, are poorly understood. Here, we investigated possible associations between decline and asymptomatic cerebral damage community residents. Methods: Study participants consisted 1308 general residents (65 ± 9 years old). Postprandial change was calculated from SBP measured just...

10.1097/hjh.0000000000000150 article EN Journal of Hypertension 2014-04-03

Sarcopenia is defined as a combination of low skeletal muscle mass index (SMI), weak strength, and reduced physical function. Recently, many studies have reported that the creatinine/cystatin C ratio (Cr/CysC) useful for evaluating mass. We designed cross-sectional study with separate model development validation groups to develop prediction equation estimate bioimpedance analysis (BIA)-measured SMI Cr/CysC.The current was retrospective study.The group included 908 subjects (288 men 620...

10.1016/j.jamda.2021.07.029 article EN cc-by-nc-nd Journal of the American Medical Directors Association 2021-08-23

One-leg standing time (OLST) has been frequently used physical performance measure; however, what muscular characteristics OLST represents remains uncertain. This cross-sectional study aimed to investigate the association between and muscle clarify possibility of using as a measure. Study participants comprised 1144 older adults aged 65 years or older. Computed tomography images provided mid-thigh skeletal area mean attenuation value. was measured for maximum 60 s. Static postural...

10.1007/s40520-023-02665-8 article EN cc-by Aging Clinical and Experimental Research 2024-01-28
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