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Creanor S, Millward BA, Demaine A, Price L, Smith W, Brown N, Creanor SL. Patients' attitudes towards screening for diabetes and other medical conditions in the dental setting. Br Dent J 2015; 216:E2. [PMID: 24413142 DOI: 10.1038/sj.bdj.2013.1247] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2013] [Indexed: 01/09/2023]
Abstract
AIM To determine the attitudes of patients attending routine appointments at primary care dental clinics and general dental practices towards the possibility of chair-side screening for medical conditions, including diabetes, in the dental setting. METHODS A brief, anonymous, self-administered questionnaire distributed to adult patients (≥18 years) attending 2 primary care dental clinics and 16 general dental practices in South-West England. RESULTS One hundred and ninety-seven completed questionnaires were received from patients at primary care dental clinics and 429 from general dental practice patients. Overall, 87% of respondents thought that it was important or very important that dentists screened patients for medical conditions such as diabetes; 79% were very willing to let a dental team member carry out screening. The majority indicated willingness to be screened for various medical conditions during a visit to the dentist, with significantly higher proportions of respondents in the primary care clinics indicating willingness (hypertension: 83% vs 74%; heart disease: 77% vs 66%; diabetes 82% vs 72% [all p <0.02]). Nearly two thirds of primary care clinic respondents and over half of general practice patients indicated that they would be willing to discuss test results with the dental team. Overall, 61% had never knowingly been screened or tested for diabetes; 20% reported that they had been tested within the previous 12 months. CONCLUSION The majority of respondents supported the concept of medical screening in a dental setting and were willing both to have screening tests and discuss their results with the dental team. Patient acceptance is paramount for successful implementation of such screening programmes.
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Sekely A, Smith W, Puente A. A-69Item Response Theory Analysis of the Trauma Symptom Inventory in Military Related Blast Injuries. Arch Clin Neuropsychol 2015. [DOI: 10.1093/arclin/acv047.69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Thomas D, Frascella J, Hall T, Smith W, Compton W, Koroshetz W, Briggs J, Grady P, Somerman M, Volkow N. Reflections on the role of opioids in the treatment of chronic pain: a shared solution for prescription opioid abuse and pain. J Intern Med 2015; 278:92-4. [PMID: 25556772 PMCID: PMC4964933 DOI: 10.1111/joim.12345] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bush NC, Keays M, Adams C, Mizener K, Pritzker K, Smith W, Traylor J, Villanueva C, Snodgrass WT. Renal damage detected by DMSA, despite normal renal ultrasound, in children with febrile UTI. J Pediatr Urol 2015; 11:126.e1-7. [PMID: 25842992 DOI: 10.1016/j.jpurol.2015.01.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 01/21/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES 2011 American Academy of Pediatrics guidelines recommended renal-bladder ultrasound (RBUS) as the only evaluation after febrile urinary tract infection (FUTI) in infants aged 2-24 months. We determined the sensitivity, specificity, and false negative rate of RBUS to identify DMSA-detected renal damage in this age group as well as in older children. METHODS Consecutive patients referred to pediatric urology with a history of FUTI underwent DMSA ≥ 3 months after FUTI. Abnormal RBUS was defined as: Society of Fetal Urology hydronephrosis grades I-IV; hydroureter ≥ 7 mm; renal scar defined as focal parenchymal thinning; and/or size discrepancy ≥ 1 cm between kidneys. Abnormal DMSA was presence of any focal uptake defects and/or split renal function < 44%. We calculated sensitivity, specificity, positive and negative predictive values, and false negative rates of RBUS compared to DMSA. RESULTS 618 patients (79% female), median age 3.4 years, were referred for FUTIs. Of the 512 (83%) with normal RBUS, 99 (19%) had abnormal DMSA. Children with normal RBUS after their first FUTI had abnormal DMSA in 15/151 (10%) aged ≤ 24 months and 23/119 (19%) aged > 24 months. RBUS had poor sensitivity (34%) and low positive predictive value (47%) to identify patients with renal damage. 99/149 (66%) children with renal damage on DMSA had normal RBUS. CONCLUSION After FUTI, 66% of children with reduced renal function and/or renal cortical defects found by DMSA scintigraphy had a normal RBUS. Since abnormal DMSA may correlate with increased risk for VUR, recurrent FUTI and renal damage, our data suggest RBUS alone will fail to detect a significant proportion of patients at risk. The data suggest that imaging after FUTI should include acute RBUS and delayed DMSA, reserving VCUG for patients with abnormal DMSA and/or recurrent FUTI.
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Sadeghi P, Banerjee R, Alghamdi M, Phan T, Taggar A, Smith W. SU-E-T-509: Inter-Observer and Inter-Modality Contouring Analysis for Organs at Risk for HDR Gynecological Brachytherapy. Med Phys 2015. [DOI: 10.1118/1.4924871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Fourie CMT, Schutte AE, Smith W, Kruger A, van Rooyen JM. Endothelial activation and cardiometabolic profiles of treated and never-treated HIV infected Africans. Atherosclerosis 2015; 240:154-60. [PMID: 25795556 DOI: 10.1016/j.atherosclerosis.2015.03.015] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 02/06/2015] [Accepted: 03/08/2015] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The role the human immunodeficiency virus (HIV) and antiretroviral treatment on endothelial activation, and the subsequent relationship with cardiovascular disease, is not well understood. We investigated endothelial activation, inflammatory and cardiometabolic profiles, and measures of vascular structure and function of 66 antiretroviral treated (ART), 78 never-treated (no-ART) HIV infected and 165 HIV free Africans. METHODS Blood samples were obtained for biochemical analysis and blood pressure, pulse wave velocity (PWV) and carotid intima-media thickness (IMT) measurements were performed. RESULTS The HIV infection duration was at least five years and the treatment 2.86±0.13 years. The intracellular adhesion molecule (ICAM) and vascular cell adhesion molecule (VCAM) levels were elevated in the HIV infected groups compared to the controls. The odds of higher adhesion molecule levels were increased when HIV infected (especially in the no-ART group); OR no-ART vs. no-HIV: ICAM 3.92 (2.2-7.0); VCAM 16.2 (7.5-35). ICAM and VCAM associated with HIV status and interleukin-6 (IL-6) in the total group (all p<0.01). In both HIV infected groups VCAM associated inversely with CD4 counts (no-ART: β=-0.28, p=0.01; ART: β=-0.22, p=0.07) and TC (no-ART: β=-0.36, p<0.01; ART: β=-0.27, p=0.03). The ART group had an unfavourable lipid profile compared to the no-ART group. The inflammatory markers (C-reactive protein (CRP) and IL-6), PWV and IMT did not differ between the three groups. CONCLUSION HIV infected Africans showed endothelial activation when compared to HIV free controls. The endothelial activation was not accompanied by increased inflammation (as measured with CRP and IL-6), arterial stiffness or sub-clinical atherosclerosis.
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Smith W, Schutte R, Huisman HW, Van Rooyen JM, Ware LJ, Fourie CMT, Mels CMC, Kruger R, McCarthy N, Schutte AE. Leptin is positively associated with blood pressure in african men with a low body mass index: the SAfrEIC study. Horm Metab Res 2015; 47:145-51. [PMID: 25295418 DOI: 10.1055/s-0034-1389926] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Severe underweight may be a risk factor for hypertension in developing countries, although the manner whereby this occurs is unknown. Leptin is known to exert both beneficial and detrimental vascular effects, and is predictive of poor cardiovascular outcome at high levels, but also at low levels. We explored the relationship between blood pressure and leptin in black men from South Africa with a body mass index (BMI) in the underweight to normal range. We included 113 African men (BMI≤25 kg/m(2)) and took anthropometric, biochemical and cardiovascular measures. The blood pressure-leptin relationship was then investigated along quintiles of leptin and within BMI stratified median split (20 kg/m(2)) groups. Blood pressure increased across leptin quintiles 1-3 (p for trend≤0.040), whereas no relationship was observed along quintiles 3 to 5 (p for trend≥0.14) (adjusted for age and waist circumference). Blood pressure was similar in the two BMI median split groups (p≥0.083). In the low BMI group only, blood pressure associated positively with leptin following unadjusted, partial, and full adjustment (systolic blood pressure and diastolic blood pressure: R(2)=0.20-0.27, β=0.32-0.34, p≤0.009). Decreasing leptin levels are not likely to contribute to hypertension prevalence in the underweight. Rather, in African men with a BMI≤20 kg/m(2), low leptin levels are positively and independently associated with elevated blood pressure, which is not seen at higher BMI (20-25 kg/m(2)). Our findings suggest a differential concentration dependent vascular effect of leptin in underweight and normal weight African men.
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Chan CT, Qi J, Smith W, Paranol R, Mazitschek R, West N, Reeves R, Chiosis G, Schreiber SL, Bradner JE, Paulmurugan R, Gambhir SS. Syntheses and discovery of a novel class of cinnamic hydroxamates as histone deacetylase inhibitors by multimodality molecular imaging in living subjects. Cancer Res 2014; 74:7475-86. [PMID: 25320008 DOI: 10.1158/0008-5472.can-14-0197] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Histone deacetylases (HDAC) that regulate gene expression are being explored as cancer therapeutic targets. In this study, we focused on HDAC6 based on its ability to inhibit cancerous Hsp90 chaperone activities by disrupting Hsp90/p23 interactions. To identify novel HDAC6 inhibitors, we used a dual-luciferase reporter system in cell culture and living mice by bioluminescence imaging (BLI). On the basis of existing knowledge, a library of hydrazone compounds was generated for screening by coupling cinnamic hydroxamates with aldehydes and ketones. Potency and selectivity were determined by in vitro HDAC profiling assays, with further evaluation to inhibit Hsp90(α/β)/p23 interactions by BLI. In this manner, we identified compound 1A12 as a dose-dependent inhibitor of Hsp90(α/β)/p23 interactions, UKE-1 myeloid cell proliferation, p21(waf1) upregulation, and acetylated histone H3 levels. 1A12 was efficacious in tumor xenografts expressing Hsp90(α)/p23 reporters relative to carrier control-treated mice as determined by BLI. Small animal (18)F-FDG PET/CT imaging on the same cohort showed that 1A12 also inhibited glucose metabolism relative to control subjects. Ex vivo analyses of tumor lysates showed that 1A12 administration upregulated acetylated-H3 by approximately 3.5-fold. Taken together, our results describe the discovery and initial preclinical validation of a novel selective HDAC inhibitor.
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Mels CMC, Schutte AE, Schutte R, Pretorius PJ, Smith W, Huisman HW, van der Westhuizen FH, Fourie CMT, van Rooyen JM, Kruger R, Louw R, Malan NT, Malan L. 8-Oxo-7,8-dihydro-2'-deoxyguanosine, reactive oxygen species and ambulatory blood pressure in African and Caucasian men: the SABPA study. Free Radic Res 2014; 48:1291-9. [PMID: 25096646 DOI: 10.3109/10715762.2014.951840] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Various studies indicate a relationship between increased oxidative stress and hypertension, resulting in increased DNA damage and consequent excretion of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG). The aim of this study was to compare urinary 8-oxodG levels in African and Caucasian men and to investigate the association between ambulatory blood pressure (BP) and pulse pressure (PP) with 8-oxodG in these groups. We included 98 African and 92 Caucasian men in the study and determined their ambulatory BP and PP. Biochemical analyses included, urinary 8-oxodG, reactive oxygen species (ROS) (measured as serum peroxides), ferric reducing antioxidant power (FRAP), total glutathione (GSH), glutathione peroxidase (GPx) and glutathione reductase (GR) activity. The African men had significantly higher systolic (SBP) and diastolic blood pressure (DBP) (both p < 0.001). Assessment of the oxidative stress markers indicated significantly lower 8-oxodG levels (p < 0.001) in the African group. The African men also had significantly higher ROS (p = 0.002) with concomitant lower FRAP (p < 0.001), while their GSH levels (p = 0.013) and GR activity (p < 0.001) were significantly higher. Single and partial regression analyses indicated a negative association between urinary 8-oxodG levels with SBP, DBP and PP only in African men. These associations were confirmed in multiple regression analyses (SBP: R(2) = 0.41; β = -0.25; p = 0.002, DBP: R(2) = 0.30; β = -0.21; p = 0.022, PP: R(2) = 0.30; β = -0.19; p = 0.03). Our results revealed significantly lower urinary 8-oxodG in African men, accompanied by a negative association with BP and PP. We propose that this may indicate a dose-response relationship in which increased oxidative stress may play a central role in the up-regulation of antioxidant defence and DNA repair mechanisms.
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Yeung R, Conroy L, Long K, Smith W, Hudson A, Moore R, Dirkse C, Phan T. Visually Monitored Deep Inspiration Breath Hold Technique in Left-Sided Breast Cancer Patients Treated With Adjuvant Radiation Therapy: Reproducibility and Reliability. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yeung R, Long K, Walrath D, Smith W, Hudson A, Phan T. Evaluation of Cardiac Dose Reduction With Deep Inspiration Breath Hold in Patients With Left-Sided Breast Cancer Receiving Adjuvant Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gutierrez M, Smith W, Thiele R, Keen H, Kaeley G, Naredo E, Iagnocco A, Bruyn G, Balint P, Filippucci E, Mandl P, Kane D, Pineda C, Delle Sedie A, Hammer H, De Miguel E, D'Agostino MA, Terslev L. THU0345 Defining Elementary Ultrasound Lesions in Gout. Preliminary Results of Delphi Consensus and Web-Exercise Reliability. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.5580] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Phillips M, Kalet I, McNutt T, Smith W. TU-F-BRD-01: Biomedical Informatics for Medical Physicists. Med Phys 2014. [DOI: 10.1118/1.4889318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Smith RW, Downey K, Snow N, Dell S, Smith W. 117: Association Between Fraction of Exhaled Nitrous Oxide (FeNO), Parameters of Asthma Control and Inhaled Corticosteroid Type in a Regional Paediatric Asthma Center. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Conroy L, Quirk S, Smith W. SU-F-BRD-07: Empirical Derivation of Site-Specific Margin Formulas. Med Phys 2014. [DOI: 10.1118/1.4889061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Emin S, Abdi F, Fanetti M, Peng W, Smith W, Sivula K, Dam B, Valant M. A novel approach for the preparation of textured CuO thin films from electrodeposited CuCl and CuBr. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.01.038] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Earle N, Smith W, Crawford J, Love D, Hayes I, Graham M, Donoghue T, Hood M, Stiles M, Skinner J. The prevalence of emerging genotypic risk factors in patients with long QT syndrome. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Skinner J, Crawford J, Waddell-Smith K, Earle N, Donoghue T, Graham M, Hayes I, Stiles M, Smith W, Love D. Development of the New Zealand cardiac inherited disease registry. Heart Lung Circ 2014. [DOI: 10.1016/j.hlc.2014.07.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Smith W, Malan N, Vilser W, Schutte A, Schutte R, Mels C, Uys L, Malan L. P9.12 THE RELATIONSHIP BETWEEN RETINAL VESSEL CALIBRE AND NOCTURNAL DIPPING STATUS: THE SABPA STUDY. Artery Res 2014. [DOI: 10.1016/j.artres.2014.09.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Schutte A, Van Rooyen J, Huisman H, Mels C, Malan N, Smith W, Kruger R, Fourie C, Ware L, Botha S, Schutte R. P10.8 CENTRAL BUT NOT BRACHIAL PRESSURE LINKED TO RBCS IN YOUNG NORMOTENSIVE INDIVIDUALS. Artery Res 2014. [DOI: 10.1016/j.artres.2014.09.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Mokhtarani M, Diaz GA, Rhead W, Berry SA, Lichter-Konecki U, Feigenbaum A, Schulze A, Longo N, Bartley J, Berquist W, Gallagher R, Smith W, McCandless SE, Harding C, Rockey DC, Vierling JM, Mantry P, Ghabril M, Brown RS, Dickinson K, Moors T, Norris C, Coakley D, Milikien DA, Nagamani SC, Lemons C, Lee B, Scharschmidt BF. Elevated phenylacetic acid levels do not correlate with adverse events in patients with urea cycle disorders or hepatic encephalopathy and can be predicted based on the plasma PAA to PAGN ratio. Mol Genet Metab 2013; 110:446-53. [PMID: 24144944 PMCID: PMC4108288 DOI: 10.1016/j.ymgme.2013.09.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 09/29/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Phenylacetic acid (PAA) is the active moiety in sodium phenylbutyrate (NaPBA) and glycerol phenylbutyrate (GPB, HPN-100). Both are approved for treatment of urea cycle disorders (UCDs) - rare genetic disorders characterized by hyperammonemia. PAA is conjugated with glutamine in the liver to form phenylacetyleglutamine (PAGN), which is excreted in urine. PAA plasma levels ≥ 500 μg/dL have been reported to be associated with reversible neurological adverse events (AEs) in cancer patients receiving PAA intravenously. Therefore, we have investigated the relationship between PAA levels and neurological AEs in patients treated with these PAA pro-drugs as well as approaches to identifying patients most likely to experience high PAA levels. METHODS The relationship between nervous system AEs, PAA levels and the ratio of plasma PAA to PAGN were examined in 4683 blood samples taken serially from: [1] healthy adults [2], UCD patients of ≥ 2 months of age, and [3] patients with cirrhosis and hepatic encephalopathy (HE). The plasma ratio of PAA to PAGN was analyzed with respect to its utility in identifying patients at risk of high PAA values. RESULTS Only 0.2% (11) of 4683 samples exceeded 500 μg/ml. There was no relationship between neurological AEs and PAA levels in UCD or HE patients, but transient AEs including headache and nausea that correlated with PAA levels were observed in healthy adults. Irrespective of population, a curvilinear relationship was observed between PAA levels and the plasma PAA:PAGN ratio, and a ratio>2.5 (both in μg/mL) in a random blood draw identified patients at risk for PAA levels>500 μg/ml. CONCLUSIONS The presence of a relationship between PAA levels and reversible AEs in healthy adults but not in UCD or HE patients may reflect intrinsic differences among the populations and/or metabolic adaptation with continued dosing. The plasma PAA:PAGN ratio is a functional measure of the rate of PAA metabolism and represents a useful dosing biomarker.
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Malan NT, Stalder T, Schlaich MP, Lambert GW, Hamer M, Schutte AE, Huisman HW, Schutte R, Smith W, Mels CMC, van Rooyen JM, Malan L. Chronic distress and acute vascular stress responses associated with ambulatory blood pressure in low-testosterone African men: the SABPA Study. J Hum Hypertens 2013; 28:393-8. [DOI: 10.1038/jhh.2013.124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Revised: 10/14/2013] [Accepted: 10/15/2013] [Indexed: 11/09/2022]
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Mels CM, Schutte AE, Schutte R, Huisman HW, Smith W, Fourie CM, Kruger R, van Rooyen JM, Malan NT, Malan L. The link between vascular deterioration and branched chain amino acids in a population with high glycated haemoglobin: the SABPA study. Amino Acids 2013; 45:1405-13. [PMID: 24178767 DOI: 10.1007/s00726-013-1611-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 10/19/2013] [Indexed: 12/23/2022]
Abstract
Globally the prevalence of non-communicable diseases, such as hypertension and type 2 diabetes, are escalating. Metabolomic studies indicated that circulating branched chain amino acids (BCAAs) are associated with insulin resistance, coronary artery disease and increased risk for cardiovascular events. We aimed to extend the current understanding of the cardiovascular risk associated with BCAAs. We explored whether BCAAs are related to markers of cardiovascular disease in a bi-ethnic population and whether this relationship was influenced by chronic hyperglycaemia. We included 200 African and 209 Caucasian participants, and determined their ambulatory blood pressure and carotid intima-media thickness (cIMT). We analysed blood samples for glycated haemoglobin (HbA1c) and BCAAs. Participants were stratified into two groups according to their HbA1c value using the median cut-off value of 5.6%. Ambulatory BP, cIMT and BCAAs were significantly higher (all p < 0.001) in the high HbA1c group. Single regression analyses indicated significant positive associations of ambulatory blood pressure and cIMT with BCAAs (all p < 0.05) in both the groups. These associations between ambulatory systolic blood pressure (SBP) (r = 0.16, p = 0.035) and cIMT (r = 0.22, p = 0.004) with BCAAs remained in the high HbA1c group after adjusting for age, gender, ethnicity and body mass index (BMI) and were confirmed in multiple regression analyses (ambulatory SBP: R (2) = 0.17, β = 0.21, p = 0.005 and cIMT: R (2) = 0.30, β = 0.19, p = 0.003). Our results demonstrate that BCAAs are independently related to ambulatory BP and cIMT in individuals with high HbA1c levels and suggest that potential cardiovascular deterioration accompany the rise in BCAAs in conditions of hyperglycaemia.
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Smith W, Deshpande L, Randall R, Li H. Gear diagnostics in a planetary gearbox: a study using internal and external vibration signals. ACTA ACUST UNITED AC 2013. [DOI: 10.1784/204764213808146617] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Malan L, Hamer M, Schlaich M, Lambert G, Ziemssen T, Reimann M, Steyn H, Schutte R, Smith W, van Rooyen J, Fourie C, Malan N. Defensive active coping facilitates chronic hyperglycaemia and endothelial dysfunction in African men: The SABPA study. Int J Cardiol 2013; 168:999-1005. [DOI: 10.1016/j.ijcard.2012.10.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 09/17/2012] [Accepted: 10/28/2012] [Indexed: 10/27/2022]
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