Browsing by Author "Collins, Kelsey H."

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    Diet-induced obesity leads to pro-inflammatory alterations to the vitreous humour of the eye in a rat model
    (Springer Nature, 2018-02) Collins, Kelsey H.; Herzog, Walter; Reimer, Raylene A.; Reno, Carol R.; Heard, Bryan J.; Hart, David Arthur
    The purpose of this study was to investigate if diet-induced obesity (DIO) and subsequent low-level systemic inflammation would result in local increases in pro-inflammatory mediators in the vitreous humour (VH) of the eyes of rats.
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    Protective effect of prebiotic and exercise intervention on knee health in a rat model of diet-induced obesity
    (2019-03-07) Rios, Jaqueline Lourdes; Bomhof, Marc R.; Reimer, Raylene A.; Hart, David A.; Collins, Kelsey H.; Herzog, Walter
    Obesity, and associated metabolic syndrome, have been identified as primary risk factors for the development of knee osteoarthritis (OA), representing nearly 60% of the OA patient population. In this study, we sought to determine the effects of prebiotic fibre supplementation, aerobic exercise, and the combination of the two interventions, on the development of metabolic knee osteoarthritis in a high-fat/high-sucrose (HFS) diet-induced rat model of obesity. Twelve-week-old male Sprague-Dawley rats were randomized into five groups: a non-exercising control group fed a standard chow diet, a non-exercising group fed a HFS diet, a non-exercising group fed a HFS diet combined with prebiotic fibre supplement, an exercise group fed a HFS diet, and an exercise group fed a HFS diet combined with prebiotic fibre supplement. Outcome measures included knee joint damage, percent body fat, insulin sensitivity, serum lipid profile, serum endotoxin, serum and synovial fluid cytokines and adipokines, and cecal microbiota. Prebiotic fibre supplementation, aerobic exercise, and the combination of the two interventions completely prevented knee joint damage that is otherwise observed in this rat model of obesity. Prevention of knee damage was associated with a normalization of insulin resistance, leptin levels, dyslipidemia, gut microbiota, and endotoxemia in the HFS-fed rats.