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Habitual Dietary Nitrate Intake And Cognition In The Australian Imaging, Biomarkers And Lifestyle Study Of Ageing: A Prospective Cohort Study, Anjana Rajendra, Nicola P. Bondonno, Kevin Murray, Liezhou Zhong, Stephanie Rainey-Smith, Samantha Gardener, Lauren Blekkenhorst, David Ames, Paul Maruff, Ralph Martins, Jonathan M. Hodgson, Catherine P. Bondonno, Australian Imaging, Biomarkers And Lifestyle Group

Research outputs 2022 to 2026

Background & aims

Dietary nitrate improves cardiovascular health via a nitric oxide (NO) pathway. NO is key to both cardiovascular and brain health. There is also a strong association between vascular risk factors and brain health. Dietary nitrate intake could therefore be associated with better cognitive function and reduced risk of cognitive decline. This is yet to be investigated. The aim of this study was to investigate the association between habitual intake of dietary nitrate from sources where nitrate is naturally present, and cognitive function, and cognitive decline, in the presence or absence of the apolipoprotein E (APOE) …

Impact Of Vascular Screening Interventions On Perceived Threat, Efficacy Beliefs And Behavioural Intentions: A Systematic Narrative Review, Reindolf Anokye, Ben Jackson, James Dimmock, Joanne M. Dickson, Mary A. Kennedy, Carl J. Schultz, Lauren C. Blekkenhorst, Jonathan M. Hodgson, Mandy Stanley, Joshua Lewis

Research outputs 2022 to 2026

Health-related behaviours contribute to the global burden of cardiovascular disease (CVD). Cardiovascular imaging can be used to screen asymptomatic individuals for increased risk of CVD to enable earlier interventions to promote health-related behaviours to prevent or reduce CVD risk. Some theories of behaviour and behaviour change assume that engagement in a given behaviour is a function of individual threat appraisals, beliefs regarding the performance of behaviour, self-efficacy for performing the desired behaviour and/or dispositions to act (e.g. behavioural intentions). To date, little is known about the impact of cardiovascular imaging interventions on these constructs. This article summarises evidence related to …

A Potential Role For Sirtuin-1 In Alzheimer's Disease: Reviewing The Biological And Environmental Evidence, Mehrane Mehramiz, Tenielle Porter, Eleanor K. O'Brien, Stephanie R. Rainey-Smith, Simon M. Laws

Research outputs 2022 to 2026

Sirtuin-1 (Sirt1), encoded by the SIRT1 gene, is a conserved Nicotinamide adenine dinucleotide (NAD+) dependent deacetylase enzyme, considered as the master regulator of metabolism in humans. Sirt1 contributes to a wide range of biological pathways via several mechanisms influenced by lifestyle, such as diet and exercise. The importance of a healthy lifestyle is of relevance to highly prevalent modern chronic diseases, such as Alzheimer's disease (AD). There is growing evidence at multiple levels for a role of Sirt1/SIRT1 in AD pathological mechanisms. As such, this review will explore the relevance of Sirt1 to AD pathological mechanisms, by describing the involvement …

Increased Nitrate Intake From Beetroot Juice Does Not Alter Soluble Cellular Adhesion Molecules And Circulating Inflammatory Cytokines In Individuals With Treated Hypertension: A Randomised, Controlled Trial, Kyle Raubenheimer, Alex H. Liu, Henrietta Koch, Erika Bosio, Nicola P. Bondonno, Vance Matthews, Marc Sim, Lauren Blekkenhorst, Richard J. Woodman, Kevin Murray, Kevin Croft, Oliver Neubauer, Jonathan M. Hodgson, Catherine P. Bondonno

Research outputs 2022 to 2026

Dietary nitrate, found predominantly in green leafy vegetables and other vegetables such as radish, celery, and beetroot, has been shown to beneficially modulate inflammatory processes and immune cell function in animals and healthy individuals. The impact of increased nitrate intake on soluble inflammatory mediators in individuals with hypertension is unclear. We assessed whether the daily consumption of dietary nitrate via beetroot juice for 1-week lowered levels of circulating inflammatory markers in men and women with treated hypertension. Twenty-seven male and female participants were recruited to a randomized, placebo-controlled, double-blind crossover trial. The effects of 1-week intake of nitrate-rich beetroot juice …

Association Between Non-Tea Flavonoid Intake And Risk Of Type 2 Diabetes: The Australian Diabetes, Obesity And Lifestyle Study, Mary D. Adu, Catherine P. Bondonno, Benjamin H. Parmenter, Marc Sim, Raymond J. Davey, Kevin Murray, Simone Radavelli Bagatini, Dianna J. Magliano, Robin M. Daly, Jonathan E. Shaw, Joshua R. Lewis, Jonathan M. Hodgson, Nicola P. Bondonno

Research outputs 2022 to 2026

Studies examining the association between flavonoid intake and measures of insulin resistance and β-cell dysfunction, as markers of type 2 diabetes (T2DM) across the adult lifespan, may provide insights into how flavonoids influence T2DM risk. This study examined the cross-sectional associations between flavonoid intakes, from dietary sources other than tea, and biomarkers of glucose tolerance and insulin sensitivity in adults aged 25 years and older participating in the Australian diabetes, obesity and lifestyle (AusDiab) study. Additionally, longitudinal associations between non-tea flavonoid intakes and incident T2DM over 12 years were explored. Eligible participants (n = 7675) had no previous history of …

Provision Of Non-Invasive Coronary And Carotid Vascular Imaging Results On Changes In Diet And Physical Activity In Asymptomatic Adults: A Scoping Review, Simone Radavelli Bagatini, Abadi K. Gebre, Mary A. Kennedy, Marc Sim, Lauren C. Blekkenhorst, Catherine P. Bondonno, Ben Jackson, James Dimmock, Marcus P. Schlaich, Jonathan M. Hodgson, Joshua R. Lewis

Research outputs 2022 to 2026

Background: Although a healthy diet and physical activity have been shown to prevent or delay cardiovascular disease (CVD) hospitalizations and deaths, most adults do not meet current guidelines. Provision of coronary artery calcification (CAC) and carotid ultrasound (CUS) imaging results may motivate beneficial lifestyle changes. We scoped the existing literature for studies providing non-invasive vascular imaging results and reporting diet, physical activity, and/or anthropometric measures to identify knowledge gaps and opportunities for further research. Methods: A systematic search was performed across three electronic databases, in line with PRISMA ScR guidelines and Arksey and O'Malley's scoping review framework. Results: Twenty studies …

Higher Consumption Of Fruit And Vegetables Is Associated With Lower Worries, Tension And Lack Of Joy Across The Lifespan, Simone Radavelli-Bagatini, Marc Sim, Lauren C. Blekkenhorst, Nicola P. Bondonno, Catherine P. Bondonno, Richard Woodman, Joanne M. Dickson, Craig Harms, Dianna J. Magliano, Jonathan E. Shaw, Robin M. Daly, Jonathan M. Hodgson, Joshua Lewis

Research outputs 2022 to 2026

Background and Aims: Higher total fruit and vegetable (FV) intakes have been
associated with lower perceived stress. However, the relationship of FV intake with domains of perceived stress is unclear. The aim of this cross-sectional study was to explore the relationship between consumption of FV and four perceived stress domains (worries, tension, lack of joy and demands) in a population-based cohort of Australian adults.

Methods: Participants (n = 8,640) were men and women aged ≥ 25 years from
the Australian Diabetes, Obesity and Lifestyle (AusDiab) Study. Dietary intake was assessed using a 74-item validated Food Frequency Questionnaire. Perceived stress domains …

Development Of A Food Composition Database For Assessing Nitrate And Nitrite Intake From Animal-Based Foods, Liezhou Zhong, Alex H. Liu, Lauren C. Blekkenhorst, Nicola P. Bondonno, Marc Sim, Richard J. Woodman, Kevin D. Croft, Joshua R. Lewis, Jonathan M. Hodgson, Catherine P. Bondonno

Research outputs 2022 to 2026

Scope:

Nitrate and nitrite are approved food additives in some animal-based food products. However, nitrate and nitrite in foods are strictly regulated due to health concerns over methaemoglobinaemia and the potential formation of carcinogenic nitrosamines. In contrast, plants (like leafy vegetables) naturally accumulate nitrate ions; a growing body of research reveals beneficial metabolic effects of nitrate via its endogenous conversion to nitric oxide. To refine the association of dietary nitrate and nitrite intake with health outcomes, reliable measures of nitrate and nitrite intake from dietary food records are required. While a vegetable nitrate content database has been developed, there is …

Psychological Distress And Quality Of Life In Asymptomatic Adults Following Provision Of Imaging Results For Prevention Of Cardiovascular Disease Events: A Scoping Review, Reindolf Anokye, Ben Jackson, James Dimmock, Joanne M. Dickson, Lauren C. Blekkenhorst, Jonathan M. Hodgson, Joshua R. Lewis, Mandy Stanley

Research outputs 2022 to 2026

Aims Psychological distress and changes in health-related quality of life (HRQoL) may occur after screening for disease. Reporting outcomes related to potential benefits and harms of screening is a key recommendation in the guidelines for reporting high-quality trials or interventions. However, no reviews have directly investigated outcomes related to psychological distress and/or changes in HRQoL following imaging assessment of cardiovascular risk and communication of cardiovascular findings to asymptomatic adults. A scoping review was conducted to map research on psychological distress and/or HRQoL following screening. Methods and results

Six electronic databases (MEDLINE, PsychINFO, Social Work Abstracts, Psychology and Behavioural Sciences Collection, …