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  1. Article ; Online: Molecular mechanisms of diabetic heart disease: Insights from transcriptomic technologies.

    Conning-Rowland, Marcella / Cubbon, Richard M

    Diabetes & vascular disease research

    2023  Volume 20, Issue 6, Page(s) 14791641231205428

    Abstract: Over half a billion adults across the world have diabetes mellitus (DM). This has a wide-ranging impact on their health, including more than doubling their risk of major cardiovascular events, in comparison to age-sex matched individuals without DM. ... ...

    Abstract Over half a billion adults across the world have diabetes mellitus (DM). This has a wide-ranging impact on their health, including more than doubling their risk of major cardiovascular events, in comparison to age-sex matched individuals without DM. Notably, the risk of heart failure is particularly increased, even when coronary artery disease and hypertension are not present. Macro- and micro-vascular complications related to endothelial cell (EC) dysfunction are a systemic feature of DM and can affect the heart. However, it remains unclear to what extent these and other factors underpin myocardial dysfunction and heart failure linked with DM. Use of unbiased 'omics approaches to profile the molecular environment of the heart offers an opportunity to identify novel drivers of cardiac dysfunction in DM. Multiple transcriptomics studies have characterised the whole myocardium or isolated cardiac ECs. We present a systematic summary of relevant studies, which identifies common themes including alterations in both myocardial fatty acid metabolism and inflammation. These findings prompt further research focussed on these processes to validate potentially causal factors for prioritisation into therapeutic development pipelines.
    MeSH term(s) Adult ; Humans ; Myocardium/metabolism ; Diabetic Cardiomyopathies/genetics ; Diabetic Cardiomyopathies/metabolism ; Heart Failure ; Diabetes Mellitus, Type 2/complications ; Gene Expression Profiling
    Language English
    Publishing date 2023-12-20
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2250793-0
    ISSN 1752-8984 ; 1479-1641
    ISSN (online) 1752-8984
    ISSN 1479-1641
    DOI 10.1177/14791641231205428
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Relationship Among Diabetes, Obesity, and Cardiovascular Disease Phenotypes: A UK Biobank Cohort Study.

    Brown, Oliver I / Drozd, Michael / McGowan, Hugo / Giannoudi, Marilena / Conning-Rowland, Marcella / Gierula, John / Straw, Sam / Wheatcroft, Stephen B / Bridge, Katherine / Roberts, Lee D / Levelt, Eylem / Ajjan, Ramzi / Griffin, Kathryn J / Bailey, Marc A / Kearney, Mark T / Cubbon, Richard M

    Diabetes care

    2023  Volume 46, Issue 8, Page(s) 1531–1540

    Abstract: Objective: Obesity and diabetes frequently coexist, yet their individual contributions to cardiovascular risk remain debated. We explored cardiovascular disease biomarkers, events, and mortality in the UK Biobank stratified by BMI and diabetes.: ... ...

    Abstract Objective: Obesity and diabetes frequently coexist, yet their individual contributions to cardiovascular risk remain debated. We explored cardiovascular disease biomarkers, events, and mortality in the UK Biobank stratified by BMI and diabetes.
    Research design and methods: A total of 451,355 participants were stratified by ethnicity-specific BMI categories (normal, overweight, obese) and diabetes status. We examined cardiovascular biomarkers including carotid intima-media thickness (CIMT), arterial stiffness, left ventricular ejection fraction (LVEF), and cardiac contractility index (CCI). Poisson regression models estimated adjusted incidence rate ratios (IRRs) for myocardial infarction, ischemic stroke, and cardiovascular death, with normal-weight nondiabetes as comparator.
    Results: Five percent of participants had diabetes (10% normal weight, 34% overweight, and 55% obese vs. 34%, 43%, and 23%, respectively, without diabetes). In the nondiabetes group, overweight/obesity was associated with higher CIMT, arterial stiffness, and CCI and lower LVEF (P < 0.005); these relationships were diminished in the diabetes group. Within BMI classes, diabetes was associated with adverse cardiovascular biomarker phenotype (P < 0.005), particularly in the normal-weight group. After 5,323,190 person-years follow-up, incident myocardial infarction, ischemic stroke, and cardiovascular mortality rose across increasing BMI categories without diabetes (P < 0.005); this was comparable in the diabetes groups (P-interaction > 0.05). Normal-weight diabetes had comparable adjusted cardiovascular mortality to obese nondiabetes (IRR 1.22 [95% CI 0.96-1.56]; P = 0.1).
    Conclusions: Obesity and diabetes are additively associated with adverse cardiovascular biomarkers and mortality risk. While adiposity metrics are more strongly correlated with cardiovascular biomarkers than diabetes-oriented metrics, both correlate weakly, suggesting that other factors underpin the high cardiovascular risk of normal-weight diabetes.
    MeSH term(s) Humans ; Cardiovascular Diseases/etiology ; Overweight/complications ; Cohort Studies ; Carotid Intima-Media Thickness ; Biological Specimen Banks ; Stroke Volume ; Risk Factors ; Body Mass Index ; Ventricular Function, Left ; Obesity/epidemiology ; Diabetes Mellitus ; Myocardial Infarction/complications ; Phenotype ; Biomarkers ; Ischemic Stroke/complications ; United Kingdom/epidemiology
    Chemical Substances Biomarkers
    Language English
    Publishing date 2023-06-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 441231-x
    ISSN 1935-5548 ; 0149-5992
    ISSN (online) 1935-5548
    ISSN 0149-5992
    DOI 10.2337/dc23-0294
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Association Between Type 2 Diabetes and Changes in Myocardial Structure, Contractile Function, Energetics, and Blood Flow Before and After Aortic Valve Replacement in Patients With Severe Aortic Stenosis.

    Jex, Nicholas / Greenwood, John P / Cubbon, Richard M / Rider, Oliver J / Chowdhary, Amrit / Thirunavukarasu, Sharmaine / Kotha, Sindhoora / Giannoudi, Marilena / McGrane, Anna / Maccannell, Amanda / Conning-Rowland, Marcella / Straw, Sam / Procter, Henry / Papaspyros, Sotiris / Evans, Betsy / Javangula, Kalyana / Ferrara, Antonella / Elmahdy, Walid / Kaul, Pankaj /
    Xue, Hui / Swoboda, Peter / Kellman, Peter / Valkovič, Ladislav / Roberts, Lee / Beech, David / Kearney, Mark T / Plein, Sven / Dweck, Marc R / Levelt, Eylem

    Circulation

    2023  Volume 148, Issue 15, Page(s) 1138–1153

    Abstract: Background: Type 2 diabetes (T2D) is associated with an increased risk of left ventricular dysfunction after aortic valve replacement (AVR) in patients with severe aortic stenosis (AS). Persistent impairments in myocardial energetics and myocardial ... ...

    Abstract Background: Type 2 diabetes (T2D) is associated with an increased risk of left ventricular dysfunction after aortic valve replacement (AVR) in patients with severe aortic stenosis (AS). Persistent impairments in myocardial energetics and myocardial blood flow (MBF) may underpin this observation. Using phosphorus magnetic resonance spectroscopy and cardiovascular magnetic resonance, this study tested the hypothesis that patients with severe AS and T2D (AS-T2D) would have impaired myocardial energetics as reflected by the phosphocreatine to ATP ratio (PCr/ATP) and vasodilator stress MBF compared with patients with AS without T2D (AS-noT2D), and that these differences would persist after AVR.
    Methods: Ninety-five patients with severe AS without coronary artery disease awaiting AVR (30 AS-T2D and 65 AS-noT2D) were recruited (mean, 71 years of age [95% CI, 69, 73]; 34 [37%] women). Thirty demographically matched healthy volunteers (HVs) and 30 patients with T2D without AS (T2D controls) were controls. One month before and 6 months after AVR, cardiac PCr/ATP, adenosine stress MBF, global longitudinal strain, NT-proBNP (N-terminal pro-B-type natriuretic peptide), and 6-minute walk distance were assessed in patients with AS. T2D controls underwent identical assessments at baseline and 6-month follow-up. HVs were assessed once and did not undergo 6-minute walk testing.
    Results: Compared with HVs, patients with AS (AS-T2D and AS-noT2D combined) showed impairment in PCr/ATP (mean [95% CI]; HVs, 2.15 [1.89, 2.34]; AS, 1.66 [1.56, 1.75];
    Conclusions: Among patients with severe AS, those with T2D demonstrate persistent abnormalities in myocardial PCr/ATP, vasodilator stress MBF, and cardiac contractile function after AVR; AVR effectively normalizes myocardial PCr/ATP, vasodilator stress MBF, and cardiac contractile function in patients without T2D.
    MeSH term(s) Humans ; Female ; Male ; Aortic Valve/diagnostic imaging ; Aortic Valve/surgery ; Diabetes Mellitus, Type 2/complications ; Ventricular Function, Left/physiology ; Aortic Valve Stenosis ; Vasodilator Agents ; Adenosine Triphosphate ; Heart Valve Prosthesis Implantation/adverse effects
    Chemical Substances Vasodilator Agents ; Adenosine Triphosphate (8L70Q75FXE)
    Language English
    Publishing date 2023-09-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80099-5
    ISSN 1524-4539 ; 0009-7322 ; 0069-4193 ; 0065-8499
    ISSN (online) 1524-4539
    ISSN 0009-7322 ; 0069-4193 ; 0065-8499
    DOI 10.1161/CIRCULATIONAHA.122.063444
    Database MEDical Literature Analysis and Retrieval System OnLINE

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