During exercise, and in the presence of sufficient oxygen, glucose is metabolised by muscle cells to produce pyruvate, a metabolic intermediate which is fed into the Kreb’s cycle in the mitochondria to produce large amounts of energy. Where oxygen is limited, for example during prolonged high intensity exercise, pyruvate is converted in the cytosol to lactate through a fermentation process involving the enzyme lactate dehydrogenase (LDH). By contrast, cancer cells always metabolise glucose through the lactate-producing pathway, regardless of the volume of oxygen available. This phenomenon, observed by Otto Warburg over 90 years ago, is known as aerobic glycolysis or “the Warburg effect”, and still remains one of the biggest unsolved mysteries in cancer biology.
All tumour types display altered cellular energetics, however they also display great variability in the magnitude of lactate production. Moreover, whilst the amount of energy produced is lower through the lactate-producing pathway, the rate of energy production is much faster, with a net cumulative effect of producing similar amounts of energy. Moreover, the acidic microenvironment produced by lactate synthesis correlates with tumour invasiveness.
The proposed project will look to quantify lactate production and produce metabolic flux maps in different cancer cell types under aerobic and anaerobic conditions by mimicking prolonged physical activity using an in vitro model of skeletal muscle. The data will be used to assess whether there are synergistic or deleterious effects on the rate of growth and invasive potential of cancer cells cultured in the presence of exercised skeletal muscle models.
Links to find out more https://www.lboro.ac.uk/departments/ssehs/staff/mhairi-morris/ https://www.lboro.ac.uk/departments/ssehs/staff/mark-lewis/ https://www.lboro.ac.uk/departments/chemical/staff/ahsan-islam/
- Applicants should have, or expect to achieve, at least a 2:1 honours degree (or equivalent) in sport and exercise science, human physiology, human biology, biochemistry or a related subject. A relevant master’s degree and/or experience in one or more of the above subjects will be an advantage.
- All students must also meet the minimum English language requirements
- A relevant master's degree and / or experience in one or more of the following will be an advantage: Human biology, exercise physiology, biochemistry, systems biology, metabolomics
How to apply:
All applications should be made online at http://www.lboro.ac.uk/study/apply/research/
. Under programme name, select School of Sport, Exercise and Health Sciences.
Please quote reference number: SSEHS/MAM