Ai-Lun Yang

Taipei University, T’ai-pei, Taipei, Taiwan

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Publications (27)75.09 Total impact

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    ABSTRACT: Dysfunction of insulin and insulin-like growth factor-1 (IGF-1) is associated with the pathophysiology of hypertension. The influence of long-term exercise on vascular dysfunction caused by hypertension remained unclear. We investigated whether long-term treadmill training improved insulin- and IGF-1-mediated vasorelaxation in hypertensive rats. Eight-week-old male spontaneously hypertensive rats (SHR) were randomly divided into sedentary and exercise (SHR-EX) groups. The SHR-EX group was trained on a treadmill for 60 min/day, 5 days/week, for 8 weeks. The Wistar Kyoto rats (WKY) were used as the normal control group. After training, aortic insulin- and IGF-1-mediated vasorelaxation was evaluated in organ baths. Additionally, the roles of phosphatidylinositol 3-kinase (PI3K), nitric oxide synthase (NOS), and aortic protein expression were examined in the three groups. Compared with sedentary SHR and WKY groups, the insulin- and IGF-1-mediated vasorelaxation was significantly enhanced to a nearly normal level in the SHR-EX group. After endothelial denudation, the blunted and comparable vasorelaxation was found among the three groups. Pretreatment with selective PI3K and NOS inhibitors attenuated the insulin- and IGF-1-mediated vasorelaxation and no significant difference was found among the three groups after the pretreatment. The aortic protein levels of insulin receptor (IR), IGF-1 receptor (IGF-1R), insulin receptor substrate-1 (IRS-1), and endothelial NOS (eNOS) were also significantly increased in the SHR-EX group, compared to the other two groups. These results suggested that treadmill training elicited the amelioration of endothelium-dependent insulin/IGF-1-mediated vasorelaxation partly via the increased activation of PI3K and NOS, as well as the enhancement of protein levels of IR, IGF-1R, IRS-1, and eNOS, in hypertension. Copyright © 2014, Journal of Applied Physiology.
    Journal of Applied Physiology 07/2015; 119(6):jap.01062.2014. DOI:10.1152/japplphysiol.01062.2014 · 3.06 Impact Factor
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    ABSTRACT: Quality of life (QoL) is an important index that allows health practitioners to understand the overall health status of an individual. One commonly used reliable and valid QoL instrument with parallel items on parent and child questionnaires, the Pediatric Quality of Life Inventory Version 4.0 (PedsQL), has been being developed since 1997. However, the use of parent- and child-reported PedsQL is still under development. Using multitrait-multimethod (MTMM) analyses and absolute agreement analyses across parent and child questionnaires can further help health practitioners understand the construct of PedsQL, and the feasibility of PedsQL in clinical. We analyzed the questionnaires of 254 parent-child dyads. MTMM through confirmatory factor analyses and percent of smallest real difference (SRD%) were used for analyzing. Our results supported the construct validity of the PedsQL. Four traits (physical, emotional, social, and school) and two methods (parent-proxy reports and child self-reports) were distinguished by MTMM. Moreover, the results of absolute agreements suggested that parent-rated and child-rated PedsQL are close (SRD% = 17.88-30.55 %); thus, a parent-rated PedsQL can be a secondary outcome representing a child’s health. We conclude that the PedsQL is useful for measuring children’s QoL, and has helpful clinical implications.
    Applied Research in Quality of Life 04/2015; DOI:10.1007/s11482-015-9405-z · 0.82 Impact Factor
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    ABSTRACT: Obesity is often associated with the development of cardiac hypertrophy but the hypertrophyrelated pathways in obesity remain unknown. The purpose of this study was to evaluate cardiac hypertrophy-related markers, atrial natriuretic peptide (ANP), B-type natriuretic peptide (BNP), tumor necrosis factor-alpha (TNFα) and hypertrophy-related pathways, interleukin (IL)-6-STAT3, IL-6-MEK5-ERK5 and calcineurin-nuclear factor of activated T-cells (NFAT)3 in the excised hearts from obese rats. Twelve obese Zucker rats were studied at 5-6 months of age and twelve age-matched lean Zucker rats served as the control group. The cardiac characteristics, myocardial architecture, ANP, BNP, TNFα levels, IL-6, STAT3, p-STAT3, MEK5, ERK-5, p-ERK-5, calcineurin and NFAT3 in the left ventricle from the rats were measured by heart weight index, echocardiography, vertical cross section, histological analysis, reverse transcription polymerase chain reaction and western blotting. Compared with the lean control, the whole heart weight, the left ventricule weight, the ratio of the whole heart weight to tibia length, echocardiographic interventricular septum, left ventricular posterior wall thickness, myocardial morphological changes and systolic blood pressure were found to increase in the obese rats. The protein levels of ANP, BNP, TNFα, IL-6, STAT3, p-STAT3, MEK-5, ERK-5, p-ERK 5, calcineurin and NFAT3 were also significantly increased in the hearts of the obese rats. The results showed that the hypertrophy-related markers, ANP, BNP and TNFα, the hypertrophy-related pathways IL-6-STAT3 and IL-6-MEK5-ERK5, and the calcineurin-NFAT3 hypertrophy-related pathways were more active in obese Zucker rats, which may provide possible hypertrophic mechanisms for developing cardiac hypertrophy and pathological changes in obesity.
    The Chinese journal of physiology 06/2014; 57(3). DOI:10.4077/CJP.2014.BAB146 · 1.16 Impact Factor
  • Hsun-Ying Mao · Li-Chieh Kuo · Ai-Lun Yang · Chia-Ting Su ·
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    ABSTRACT: The balance ability in children with attention deficit hyperactivity disorder-combined type (ADHD-C) has not been fully examined, particularly dynamic sitting balance. Moreover, the findings of some published studies are contradictory. We examined the static and dynamic sitting balance ability in 20 children with ADHD-C (mean age: 9 years 3 months; 18 boys, 2 girls) and 20 age-, sex-, height-, weight-, and IQ-matched healthy and typically developing controls (mean age: 9 years 2 months; 18 boys, 2 girls). The balance subtests of the Movement Assessment Battery for Children (MABC) and the Bruininks-Oseretsky Test of Motor Proficiency (BOTMP) were used to compare the two groups, and a mechanical horseback riding test was recorded using a motion-capture system. Compared with the controls, children with ADHD-C had less-consistent patterns of movement, more deviation of movement area, and less-effective balance strategies during mechanical horseback riding. In addition, their performance on the balance subtests of the MABC and BOTMP were not as well as those of the controls. Our findings suggest that balance ability skill levels in children with ADHD-C were generally not as high as those of the controls in various aspects, including static and dynamic balance.
    Research in developmental disabilities 06/2014; 35(6):1252–1258. DOI:10.1016/j.ridd.2014.03.020 · 4.41 Impact Factor
  • Chia-Ting Su · Hong-Son Ng · Ai-Lun Yang · Chung-Ying Lin ·
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    ABSTRACT: Quality-of-life (QoL) instruments measure the overall health status of people with schizophrenia, for whom the activities of daily life are often difficult. However, information on the psychometric properties of scores from the Short Form 36 Health Survey (SF-36) and the World Health Organization Quality of Life Scale Brief Version (WHOQOL-BREF), 2 commonly used generic QoL instruments in this population, is limited. Thus, we used a multitrait-multimethod analysis plus confirmatory factor analysis (CFA) to examine their psychometric properties. To test the reliability of their scores, we used methods of absolute reliability (standard error of measurement [SEM] and smallest real difference [SRD]) and relative reliability (i.e., intraclass correlation coefficient [ICC]). We recruited 100 patients with schizophrenia from a psychiatric hospital in southern Taiwan. All participants filled out the SF-36 and the WHOQOL-BREF at baseline and 2 weeks later. The participants' QoL scores were lower than those of the Taiwan general population (ps < .01), and CFA indicated that the constructs of QoL scores for the SF-36 (comparative fit index [CFI] = .918; incremental fit index [IFI] = .919; Tucker-Lewis index [TLI] = .885) and the WHOQOL-BREF (CFI = .967; IFI = .967; TLI = .900) were acceptable. The SEM and SRD analyses suggested that the total scores of the SF-36 (SEM% = 10.03%; SRD% = 27.80%) and of the WHOQOL-BREF (SEM% = 5.55%; SRD% = 15.40%) were reliable. Also, our results demonstrated that the WHOQOL-BREF scores were more reliable and valid than the SF-36 scores for assessing people with schizophrenia. The scores of both questionnaires were valid and reliable and detected different aspects of QOL in the population with schizophrenia. (PsycINFO Database Record (c) 2014 APA, all rights reserved).
    Psychological Assessment 05/2014; 26(3). DOI:10.1037/a0036764 · 2.99 Impact Factor
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    ABSTRACT: Quality of life (QoL) instruments for children provide an important health index for school healthcare professionals to understand students’ overall health status. We investigated the psychometric properties of the Chinese version of the widely used Kid-KINDL and reported on the wording effect of its positively and negatively worded items. A convenience sample of 8- to 12-year-old students (n = 443) completed the Kid-KINDL; 89 of them completed it again 7-14 days later. The internal consistency was satisfactory in the total score ( =.87) and two subscales ( =.704 [emotional] and .853 [self-esteem]), but unsatisfactory for the other subscales ( =.578 [physical], .533 [friend], .520 [family], and .560 [school]). Test-retest reliability was acceptable in all the subscales and the total score (ICC >.6). A multitrait-multimethod design using several confirmatory factor analysis models confirmed the construct validity of the Kid-KINDL when the wording effect was taken into account (GFI =.912-.934, TLI =.889-.930, CFI =.910-.947, IFI =.912-.948, RMSEA =.045-.057, SRMR =.045-.056). We conclude that the Kid-KINDL is a reliable and valid tool for teachers to use to evaluate students’ QoL if the total score is used.
    European Journal of Psychological Assessment 01/2014; 30(2):100-109. DOI:10.1027/1015-5759/a000175 · 2.53 Impact Factor
  • Chung-Ying Lin · Ai-Lun Yang · Chia-Ting Su ·
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    ABSTRACT: This study aimed to objectively compare the daily physical activity (PA), as indicated by moderate-to-vigorous physical activity (MVPA) during a week and metabolic equivalents (METs) per minute, between children with attention deficit hyperactivity disorder (ADHD) and typically developing children. Moreover, sensory modulation problems were examined using behavioral and physiological measures. Twenty boys with ADHD (mean age 8.64±2.57 years), and 20 matched typically developing boys (mean age 9.10±1.79 years) participated in our study. Each child wore a PA monitor for 14h a day, seven days a week. All participants' parents were asked to fill out daily activity logs for their children. The problems of sensory modulation were detected using sensory profile (SP) questionnaires and Sensory Challenge Protocol that measured electrodermal response (EDR) to repeated sensory stimulation. Compared with the controls, the children with ADHD had a generally higher level of PA (1.48±0.10 vs. 1.60±0.12METs/min; p=001), and tended to spend more time in MVPA on weekdays (35.71%) and the weekend (57.14%). However, when analyzing hourly recorded PA, the group differences were obvious only for certain hours. Our data suggested that children with ADHD were more hyperactive in structure-free than structured settings. The ADHD group showed their sensory modulation problems on the SP but not on the EDR. We found some correlations between sensory modulation problems and hyperactivity in children with ADHD.
    Research in developmental disabilities 08/2013; 34(10):3477-3486. DOI:10.1016/j.ridd.2013.07.021 · 4.41 Impact Factor
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    ABSTRACT: The exercise capacity and limitation in children with asymptomatic atrial septal defect (ASD) have not been explored thoroughly. The aim of our study was to examine the influence of asymptomatic ASD on exercise capacity in children. Fifty children with asymptomatic ASD who had undergone medical interventions at least 4 years ago and fifty normal children were recruited in this study. The exercise capacity was assessed by the symptom-limited exercise test through the Bruce treadmill protocol. The pulmonary function was also evaluated by the spirometry. Circulatory and ventilatory impairments were respectively reflected by chronotropic incompetence (CI) and ventilatory limitation as measured by the exercise test and spirometry. Eleven (22%) of children with ASD failed to reach the age-predicted peak heart rate during the exercise test. Also, children with ASD had significantly lower oxygen consumption at anaerobic threshold and peak exercise (P < 0.01). The rate of circulatory impairment was significantly higher in children with ASD (P < 0.01). However, the pulmonary function and ventilatory limitation were comparable between these two groups. Within the ASD group, children with CI had significantly worse peak oxygen consumption than their peers without CI (P < 0.01). Our study examined a larger population sample and confirmed that children with asymptomatic ASD, who had previously undergone medical interventions, had significantly worse exercise capacity than normal children. This difference in exercise capacity was mainly related to circulatory impairment. Our findings support the concerns of exercise limitation in ASD children.
    The Chinese journal of physiology 04/2013; 56(2). DOI:10.4077/CJP.2013.BAA086 · 1.16 Impact Factor
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    ABSTRACT: An important assumption for comparing children's quality of life (QoL) between children's and parents' perceptions is that measurement equivalence/invariance (ME/I) exists. The ME/I across the child- and parent-reported Chinese PedsQL was examined, and the latent means between child self-reports and parent-proxy reports were compared. Third-grade to sixth-grade children (n = 519) and their parents (n = 270) respectively completed the child- and parent-reported PedsQL. Seventy-eight parents completed parent-proxy reports twice. Full ME/I across child and parent reports was found in first- and second-order factor loadings. Partial ME/I was supported in item intercepts and item residual variances. The latent means of child self-reports and of parent-proxy reports were not significantly different, which suggested interchangeability between child- and parent-reported PedsQL. The ME/I results support the use of PedsQL scores to compare children's and parents' perceptions of children's QoL.
    Child Psychiatry and Human Development 12/2012; 44(5). DOI:10.1007/s10578-012-0352-8 · 1.93 Impact Factor
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    ABSTRACT: BACKGROUND: Increased myocyte apoptosis in diabetic hearts has been previously reported. The purpose of this study was to evaluate the effects of exercise training on cardiac survival pathways in streptozotocin (STZ)-induced diabetic rats. METHODS: Forty-eight male Wistar rats were randomly divided into control group (Control), STZ-induced (65mg/kg, i.p.) diabetes (DM), and DM rats with moderate aerobic exercise training (DM-EX) on a treadmill 60min/day, 5days/week, for 10weeks. Histopathological analysis, positive TUNEL assays and Western blotting were performed on the excised cardiac left ventricles from all three groups. RESULTS: The components of cardiac survival pathway (insulin-like growth factor I (IGFI), IGFI-receptor (IGFI-R), phosphatidylinositol 3'-kinase (PI3K), and Akt) and the pro-survival Bcl-2 family proteins (Bcl-2, Bcl-xL, and p-BAD) were all significantly decreased in the DM group compared with the Control group whereas they were increased in the DM-EX group. In addition, the abnormal myocardial architecture, enlarged interstitial space and increased cardiac TUNEL-positive apoptotic cells were observed in the DM group, but they were reduced in the DM-EX group. The apoptotic key component, caspase-3, was significantly increased in the DM group relative to the Control group whereas it was decreased in the DM-EX group. CONCLUSIONS: Exercise training enhances cardiac IGFI-R/PI3K/Akt and Bcl-2 family associated pro-survival pathways, which provides one of the new beneficial effects for exercise training in diabetes.
    International journal of cardiology 02/2012; 167(2). DOI:10.1016/j.ijcard.2012.01.031 · 4.04 Impact Factor
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    ABSTRACT: Activated cardiac apoptosis was found in hearts from hypertensive animals, but little information regarding the effects of exercise training on cardiac apoptosis in hypertension is available. The purpose of this study was to evaluate the anti-apoptotic and pro-survival effects of exercise training on hypertensive hearts. 28 spontaneously hypertensive rats were divided into sedentary group (SHR) or underwent running exercise on treadmill for 1 h/day, 5 sessions/wk, for 12 wk (SHR-EX). Fourteen age-matched Wistar Kyoto rats served as a sedentary normotensive group (WKY). After exercise training or sedentary status, the excised hearts were measured by hemotoxylin and eosin staining, terminal deoxynucleotidyl transferase dUTP-mediated nick-end labeling (TUNEL) assay, and Western blotting. Fewer TUNEL-positive apoptotic cells were in SHR-EX groups than those in SHR. Protein levels of Fas ligand, Fas death receptor, tumor necrosis factor (TNF)-α, TNF receptor 1, Fas-associated death domain (FADD), activated caspase-8, and activated caspase-3 (Fas-dependent apoptotic pathways), as well as Bid, t-Bid, Bad, p-Bad, Bak, cytochrome c, activated caspase 9, and activated caspase-3 (mitochondria-dependent apoptotic pathways) were decreased in the SHR-EX group compared with the SHR group. Protein levels of IGF-1, IGF-1R, p-PI3K, p-Akt, p-Bad, and Bcl2 (cardiac pro-survival pathway) become more activated in SHR-EX groups than SHR and WKY. Exercise training prevented hypertension-enhanced cardiac Fas-dependent and mitochondria-dependent apoptotic pathways and enhanced cardiac pro-survival pathway in rat models. Our findings demonstrate new therapeutic effects of exercise training on hypertensive hearts for preventing apoptosis and enhancing survival.
    Journal of Applied Physiology 12/2011; 112(5):883-91. DOI:10.1152/japplphysiol.00605.2011 · 3.06 Impact Factor
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    ABSTRACT: To evaluate the psychometric properties and gender invariance of the Chinese version of the Pediatric Quality of Life Inventory (PedsQL) for 8- to 12-year-olds. Psychometric testing and confirmatory factor analysis (CFA) were used with a convenience sample of 8- to 12-year-old children (n = 479) for PedsQL full and short forms. The internal consistency reliability was satisfactory for all subscales and total scores (Cronbach's α = 0.73-0.90), except for the school subscale (0.68 [full form], 0.62 [short form]). Test-retest reliability was 0.67-0.84. Convergent validity was supported by the correlation between the Children's Depression Inventory and PedsQL psychosocial subscale (r = -0.69). Construct validity determined using CFA showed a better model fit in the short form (RMSEA = 0.06) than in the full form (RMSEA = 0.08). Measurement invariance across gender determined using nested CFA models showed that all absolute ΔRMSEA values were <0.01. The Chinese version of the PedsQL is a relatively reliable and valid instrument, and the PedsQL short form showed a better construct validity than did the full form. Measurement across gender was invariant; therefore, the comparisons of quality of life between boys and girls were appropriate.
    Quality of Life Research 05/2011; 21(1):177-82. DOI:10.1007/s11136-011-9928-1 · 2.49 Impact Factor
  • Ai-Lun Yang · Chia-Wen Lo · Jen-Ting Lee · Chia-Ting Su ·
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    ABSTRACT: Exercise can ameliorate vascular dysfunction in hypertension, but its underlying mechanism has not been explored thoroughly. We aimed to investigate whether the high-intensity exercise could enhance vasorelaxation mediated by insulin and insulin-like growth factor-1 (IGF-1) in hypertension. Sixteen-week-old spontaneously hypertensive rats were randomly divided into non-exercise sedentary (SHR) and high-intensity exercise (SHR+Ex) groups conducted by treadmill running at a speed of 30 m/ min until exhaustion. Age-matched Wistar-Kyoto rats (WKY) were used as the normotensive control group. Immediately after exercise, the agonist-induced vasorelaxation of aortas was evaluated in organ baths with or without endothelial denudation. Selective inhibitors were used to examine the roles of nitric oxide synthase (NOS) and phosphatidylinositol-3 kinase (PI3K) in the vasorelaxation. By adding superoxide dismutase (SOD), a superoxide scavenger, the role of superoxide production in the vasorelaxation was also clarified. We found that, the high-intensity exercise significantly (P < 0.05) induced higher vasorelaxant responses to insulin and IGF-1 in the SHR+Ex group than that in the SHR group; after endothelial denudation and pre-treatment of the PI3K inhibitor, NOS inhibitor, or SOD, vasorelaxant responses to insulin and IGF-1 became similar among three groups; the protein expression of insulin receptor, IGF-1 receptor, and endothelial NOS (eNOS) was significantly (P < 0.05) increased in the SHR+Ex group compared with the SHR group;] the relaxation to sodium nitroprusside, a NO donor, was not different among three groups. Our findings suggested that the high-intensity exercise ameliorated the insulin- and IGF-1-mediated vasorelaxation through the endothelium-dependent pathway, which was associated with the reduced level of superoxide production.
    The Chinese journal of physiology 04/2011; 54(2):87-95. DOI:10.4077/CJP.2011.AMM011 · 1.16 Impact Factor
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    ABSTRACT: Cardiac apoptosis was found in ovariectomized rats without ischemia. Limited information regarding the protective effects of 17beta-estradiol (E2) on cardiac Fas-dependent and mitochondria-dependent apoptotic pathways after post-menopause or bilateral oophorectomy in women was available. Forty-eight female Wistar rats at 6-7 months of age were divided into sham-operated group (Sham, n = 16) and bilateral ovariectomized group (n = 32). After 4 weeks of operation, rats in ovariectomized group were injected intraperitoneally with either saline (OVX, n = 16) or 10 microg/kg/day 17beta-estradiol (E2) for 10 weeks (OVX-E2, n = 16). The excised hearts were measured by Hematoxylin-eosin staining, DAPI staining, positive TUNEL assays, and Western Blotting. 17beta-estradiol (E2) decreased OVX-induced cardiac widely dispersed TUNEL-positive apoptotic cells. 17beta-estradiol (E2) decreased OVX-induced TNF-alpha, Fas ligand (Fas L), Fas death receptors (Fas), Fas-associated death domain (FADD), activated caspase 8, and activated caspase 3 (Fas pathways). 17beta-estradiol (E2) decreased OVX-induced proapoptotic t-Bid, Bax, Bax-to-Bcl2 ratio, Bax-to-BclXL ratio, activated caspase 9, and activated caspase 3 as well as increased anti-apoptotic Bcl2 and Bcl-XL relative to OVX (mitochondria pathway). Our findings suggest that chronic 17beta-estradiol (E2) treatment can prevent ovariectomy-induced cardiac Fas-dependent and mitochondria-dependent apoptotic pathways in rat models. The findings may provide one of possible mechenisms of 17beta-estradiol (E2) for potentially preventing cardiac apoptosis after bilateral ovariectomy or menopause.
    Cell Biochemistry and Function 08/2010; 28(6):521-8. DOI:10.1002/cbf.1687 · 2.01 Impact Factor
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    ABSTRACT: To compare stance control between children with sensory modulation disorder (SMD) and typically developing children in various visual and somatosensory conditions. Thirty-one children participated in this study, including 17 children with SMD and 14 matched typically developing children. The Sensory Profile was used to screen for sensory modulation problems, which were further confirmed by measures of electrodermal response and the Evaluation of Sensory Processing. Stance parameters for an assessment of postural stability were obtained with a dual-axis accelerometer on the lumbar area. The children with SMD presented atypical sensory responses in terms of both electrophysiological and behavioral measures. The results for stance showed a greater body sway in the SMD group than in the control group (p < .05). However, the group difference was not always significant under the conditions of reliable somatosensory input and sway-referenced vision. Our findings first confirmed impaired stance control in children with SMD.
    The American journal of occupational therapy.: official publication of the American Occupational Therapy Association 06/2010; 64(3):443-52. DOI:10.5014/ajot.2010.09074 · 1.70 Impact Factor
  • Yi-Yuan Lin · Ai-Lun Yang · Chien-Kuei Yeh · Chia-Ting Su ·

    Medicine &amp Science in Sports &amp Exercise 05/2010; 42:309-310. DOI:10.1249/01.MSS.0000384461.49677.9f · 3.98 Impact Factor
  • Chia-Ting Su · Hsun-Ying Mao · Ai-Lun Yang ·

    Medicine &amp Science in Sports &amp Exercise 05/2010; 42:551-552. DOI:10.1249/01.MSS.0000385361.85925.10 · 3.98 Impact Factor
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    ABSTRACT: Limited information is available concerning the effects of aerobic exercise on vasorelaxation in hypertension. The aim of this study was to investigate the effects of a single bout of aerobic exercise on insulin- and insulin-like growth factor-1 (IGF-1)-induced vasorelaxation in hypertensive rats. Four-month-old spontaneously hypertensive rats were randomly divided into a sedentary group (SHR) and an exercise group (SHR+Ex) subjected to a single bout of aerobic exercise conducted by treadmill running at 21 m min(1) for 1 h. Age-matched Wistar-Kyoto rats were used as a normotensive control group (WKY). Insulin- and IGF-1-induced vasorelaxant responses in the three groups were evaluated by using isolated aortic rings, with or without endothelial denudation, in organ baths. Possible roles of phosphatidylinositol 3-kinase (PI3K) and nitric oxide synthase (NOS) involved in the NO-dependent vasorelaxation were examined by adding selective inhibitors. The role of superoxide was also clarified by adding superoxide dismutase (SOD). In addition, the endothelium-independent vascular responses to sodium nitroprusside (SNP), a NO donor, were examined. The insulin- and IGF-1-induced vasorelaxation was significantly (P < 0.05) decreased in the SHR group compared with the WKY group. This decreased response in SHR was improved by exercise. These vasorelaxant responses among the three groups became similar after endothelial denudation and pretreatment with the PI3K inhibitor, NOS inhibitor or SOD. Also, no difference among groups was found in the SNP-induced vasorelaxation. We concluded that a single bout of aerobic exercise acutely improves insulin- and IGF-1-mediated vasorelaxation in an endothelium-dependent manner in hypertensive rats.
    Experimental physiology 02/2010; 95(5):622-9. DOI:10.1113/expphysiol.2009.050146 · 2.67 Impact Factor

  • Medicine &amp Science in Sports &amp Exercise 05/2009; 41(Supplement 1). DOI:10.1249/01.MSS.0000354641.25598.e1 · 3.98 Impact Factor

  • Medicine &amp Science in Sports &amp Exercise 05/2009; 41(Supplement 1):31-32. DOI:10.1249/01.mss.0000353358.80793.11 · 3.98 Impact Factor