DIET and exercise
PUFA/ fish oils
Historical epidemiological studies have shown that individuals that consume a diet rich in fish/seafood (eg. Mediterranean, Japanese or ‘Eskimo’ diets) have benefits towards cardiovascular health. The polyunsaturated fatty acids (PUFAs) in fish oil (EPA and DHA) are considered a major component of these effects. Several large combined studies suggest that dietary fish oil 3-PUFAs levels are associated with a reduced risk of mortality and morbidity from cardiovascular diseases including the JELIS trial in Japan with >18,000 participants which showed a 19% risk reduction in major coronary events. EPA and DHA experimentally improve cardiac and vascular health and circulating lipids.
There are a number of potential mechanisms by which PUFAs may have beneficial actions by being transformed in to distinct biologically active mediators.. We have become particularly interested in understanding metabolites formed from a set of CYP450 enzymes called epoxygenases. Epoxygenases accept a variety of PUFA’s to produce biologically active mediators in a variety of tissue including cardiac, vascular and inflammatory cells..
Exercise
The World Health Organisation has now identifies that physical inactivity is the 4th leading risk factor for global mortality just behind, hypertension, tobacco use and hyperglycaemia. As such, organisations such as the World Health Organisation, the American Heart Association and the British Heart Foundation recommend that individuals undertake an exercise regime of the order of at least 30 minutes of moderate-intensity aerobic activity at least 5 days per week, and moderate to high intensity muscle-strengthening activity for least 2 or more days per week for additional health benefits. Over the last 100-50 year’s physical activity in many populations has declined. This decline is also associated with an increase in the incidence of metabolic disorders such as type 2 diabetes, obesity and cardiovascular disease. There is an argument that humans have evolved as endurance athletes, potentially being the amongst the best endurance land animals taking account size and distance. Pressure for these evolutionary changes have been hypothesised as the need for long distant migration, the need to scavenge over greater distances and the potential to persistence hunt. Our evolutionary pressure to exercise therefore may underlie our susceptibility to these conditions when living a sedentary lifestyle. Understanding how exercise exerts its benefits may therefore provide new therapies for diseases such as diabetes, obesity and cardiovascular disease. A number of members of the nuclear receptor family of proteins which we study control pathways of metabolism, inflammation and muscle development.
Historical epidemiological studies have shown that individuals that consume a diet rich in fish/seafood (eg. Mediterranean, Japanese or ‘Eskimo’ diets) have benefits towards cardiovascular health. The polyunsaturated fatty acids (PUFAs) in fish oil (EPA and DHA) are considered a major component of these effects. Several large combined studies suggest that dietary fish oil 3-PUFAs levels are associated with a reduced risk of mortality and morbidity from cardiovascular diseases including the JELIS trial in Japan with >18,000 participants which showed a 19% risk reduction in major coronary events. EPA and DHA experimentally improve cardiac and vascular health and circulating lipids.
There are a number of potential mechanisms by which PUFAs may have beneficial actions by being transformed in to distinct biologically active mediators.. We have become particularly interested in understanding metabolites formed from a set of CYP450 enzymes called epoxygenases. Epoxygenases accept a variety of PUFA’s to produce biologically active mediators in a variety of tissue including cardiac, vascular and inflammatory cells..
Exercise
The World Health Organisation has now identifies that physical inactivity is the 4th leading risk factor for global mortality just behind, hypertension, tobacco use and hyperglycaemia. As such, organisations such as the World Health Organisation, the American Heart Association and the British Heart Foundation recommend that individuals undertake an exercise regime of the order of at least 30 minutes of moderate-intensity aerobic activity at least 5 days per week, and moderate to high intensity muscle-strengthening activity for least 2 or more days per week for additional health benefits. Over the last 100-50 year’s physical activity in many populations has declined. This decline is also associated with an increase in the incidence of metabolic disorders such as type 2 diabetes, obesity and cardiovascular disease. There is an argument that humans have evolved as endurance athletes, potentially being the amongst the best endurance land animals taking account size and distance. Pressure for these evolutionary changes have been hypothesised as the need for long distant migration, the need to scavenge over greater distances and the potential to persistence hunt. Our evolutionary pressure to exercise therefore may underlie our susceptibility to these conditions when living a sedentary lifestyle. Understanding how exercise exerts its benefits may therefore provide new therapies for diseases such as diabetes, obesity and cardiovascular disease. A number of members of the nuclear receptor family of proteins which we study control pathways of metabolism, inflammation and muscle development.
Mechanisms of the Health Benefits Of Exercise
Through work on nuclear receptors that include steroid and a keen interest in sport Dr Bishop-Bailey as had a keen interested in what mediates the health benefits of exercise. As a researcher this interest has spread to how pharmacology and genes can be harnessed for health, but also abused by doping. Dr Bishop-Bailey has present talks on gene doping to UK Anti-doping and was the British Pharmacological Society MSD Prize Lecturer in 2013; where he presented a talk on the Mechanisms governing the health and performance benefits of exercise.
Relevant Articles:
Mechanisms governing the health and performance benefits of exercise. Bishop-Bailey D.
Br J Pharmacol. 2013 Nov;170(6):1153-66.
PPARs and angiogenesis. Bishop-Bailey D.
Biochem Soc Trans. 2011 Dec;39(6):1601-5.
PPAR receptor activation: Experimental studies on cardiac structure and function.Bishop-Bailey D.
Curr Opin Investig Drugs. 2010 Mar;11(3):283-8.
Emerging roles of peroxisome proliferator-activated receptor-beta/delta in inflammation. Bishop-Bailey D, Bystrom J.
Pharmacol Ther. 2009 Nov;124(2):141-50.
Activation of PPARbeta/delta inhibits leukocyte recruitment, cell adhesion molecule expression, and chemokine release. Piqueras L, Sanz MJ, Perretti M, Morcillo E, Norling L, Mitchell JA, Li Y, Bishop-Bailey D.
J Leukoc Biol. 2009 Jul;86(1):115-22.
The Role of PPARs in the Endothelium: Implications for Cancer Therapy. Bishop-Bailey D, Swales KE.
PPAR Res. 2008;2008:904251
Activation of PPARbeta/delta induces endothelial cell proliferation and angiogenesis. Piqueras L, Reynolds AR, Hodivala-Dilke KM, Alfranca A, Redondo JM, Hatae T, Tanabe T, Warner TD, Bishop-Bailey D.
Arterioscler Thromb Vasc Biol. 2007 Jan;27(1):63-9.
Role of prostacyclin versus peroxisome proliferator-activated receptor beta receptors in prostacyclin sensing by lung fibroblasts. Ali FY, Egan K, FitzGerald GA, Desvergne B, Wahli W, Bishop-Bailey D, Warner TD, Mitchell JA.
Am J Respir Cell Mol Biol. 2006 Feb;34(2):242-6.
Peroxisome proliferator-activated receptors and inflammation. Moraes LA, Piqueras L, Bishop-Bailey D.
Pharmacol Ther. 2006 Jun;110(3):371-85.
Peroxisome proliferator-activated receptors: a critical review on endogenous pathways for ligand generation. Bishop-Bailey D, Wray J.
Prostaglandins Other Lipid Mediat. 2003 Apr;71(1-2):1-22.
Peroxisome proliferator-activated receptors in the cardiovascular system. Bishop-Bailey D. Br J Pharmacol. 2000 Mar;129(5):823-34
Mechanisms governing the health and performance benefits of exercise. Bishop-Bailey D.
Br J Pharmacol. 2013 Nov;170(6):1153-66.
PPARs and angiogenesis. Bishop-Bailey D.
Biochem Soc Trans. 2011 Dec;39(6):1601-5.
PPAR receptor activation: Experimental studies on cardiac structure and function.Bishop-Bailey D.
Curr Opin Investig Drugs. 2010 Mar;11(3):283-8.
Emerging roles of peroxisome proliferator-activated receptor-beta/delta in inflammation. Bishop-Bailey D, Bystrom J.
Pharmacol Ther. 2009 Nov;124(2):141-50.
Activation of PPARbeta/delta inhibits leukocyte recruitment, cell adhesion molecule expression, and chemokine release. Piqueras L, Sanz MJ, Perretti M, Morcillo E, Norling L, Mitchell JA, Li Y, Bishop-Bailey D.
J Leukoc Biol. 2009 Jul;86(1):115-22.
The Role of PPARs in the Endothelium: Implications for Cancer Therapy. Bishop-Bailey D, Swales KE.
PPAR Res. 2008;2008:904251
Activation of PPARbeta/delta induces endothelial cell proliferation and angiogenesis. Piqueras L, Reynolds AR, Hodivala-Dilke KM, Alfranca A, Redondo JM, Hatae T, Tanabe T, Warner TD, Bishop-Bailey D.
Arterioscler Thromb Vasc Biol. 2007 Jan;27(1):63-9.
Role of prostacyclin versus peroxisome proliferator-activated receptor beta receptors in prostacyclin sensing by lung fibroblasts. Ali FY, Egan K, FitzGerald GA, Desvergne B, Wahli W, Bishop-Bailey D, Warner TD, Mitchell JA.
Am J Respir Cell Mol Biol. 2006 Feb;34(2):242-6.
Peroxisome proliferator-activated receptors and inflammation. Moraes LA, Piqueras L, Bishop-Bailey D.
Pharmacol Ther. 2006 Jun;110(3):371-85.
Peroxisome proliferator-activated receptors: a critical review on endogenous pathways for ligand generation. Bishop-Bailey D, Wray J.
Prostaglandins Other Lipid Mediat. 2003 Apr;71(1-2):1-22.
Peroxisome proliferator-activated receptors in the cardiovascular system. Bishop-Bailey D. Br J Pharmacol. 2000 Mar;129(5):823-34
Notes
PPARb/d, GW501516, Endurobol, Cardarine and Doping
GW501516 was developed by GSK as a new drug to treat dyslipaemia. GW501516 is a selective activator or a receptor in the body called PPARbeta/delta. PPARb/d is related to the receptors that mediate the actions on a number of steroids. In the 2000's Prof Ron Evans group at the Salk Institute showed that overexpressing PPARb/d or activating PPARb/d with GW501516 increased endurance running in treadmill trained mice. It also decreased experimental diabetes and obesity.
Our interest in the field came from study the family of PPAR receptors in blood vessels. We were amongst the first to show they were present in blood vessels, and in particular activation of PPARb/d caused new blood vessel growth; which is potentially important in getting more oxygen in to training muscle.
As a therapeutic, PPARb/d activators looked very promising, and were given to volunteers and patients in short term phase 1 and phase 2 clinical trails, the development of the drug was halted when GSK themselves presented data that long term use of GW5015516 in rats and mice led to widespread tumours. The 2 year study in rats led to tumour formation with all doses of the drug tested and cancers (neoplasms) occurred in the liver, urinary bladder, thyroid gland, ,tongue, stomach, skin, testes, ovaries and uterus (Abstract by reported Geiger et al., in The Toxicologist 2009 vol 108(1)).
N.B. for a drug to get to phase 2 clinical trials takes a huge investment (millions) from the developing pharmaceutical company. Although there are as yet no reports of any cancers linked to GW501516 in the clinical trials, there was clearly sufficient concern that development be immediately halted for the treatment of dyslipidaemia.
Since they showed potential to enhance athletic endurance, GW501516 and PPARb/d activators are listed as substances banned by the World Anti-doping agency (WADA). WADA also released an unprecedented alert to highlight these cancer findings:
(https://www.wada-ama.org/en/media/news/2013-03/wada-issues-alert-on-gw501516)
A quick internet search alone will tell you that unlicensed black market GW501516 (also called GW-501,516, GW1516, GSK-516 and on the black market as Endurobol or Cardarine) is being sold and used by bodybuilders and athletes; with at least 5 athletes being caught with in in their system.
Although short term use in humans has not shown these signs - only very low numbers of subjects have ever been monitored. The long term consequences of taking GW501516 are not known, but the strength of the pre-clinical findings in rodents is a major cause for concern that the findings will be reproducible in time in the human population.
Our interest in the field came from study the family of PPAR receptors in blood vessels. We were amongst the first to show they were present in blood vessels, and in particular activation of PPARb/d caused new blood vessel growth; which is potentially important in getting more oxygen in to training muscle.
As a therapeutic, PPARb/d activators looked very promising, and were given to volunteers and patients in short term phase 1 and phase 2 clinical trails, the development of the drug was halted when GSK themselves presented data that long term use of GW5015516 in rats and mice led to widespread tumours. The 2 year study in rats led to tumour formation with all doses of the drug tested and cancers (neoplasms) occurred in the liver, urinary bladder, thyroid gland, ,tongue, stomach, skin, testes, ovaries and uterus (Abstract by reported Geiger et al., in The Toxicologist 2009 vol 108(1)).
N.B. for a drug to get to phase 2 clinical trials takes a huge investment (millions) from the developing pharmaceutical company. Although there are as yet no reports of any cancers linked to GW501516 in the clinical trials, there was clearly sufficient concern that development be immediately halted for the treatment of dyslipidaemia.
Since they showed potential to enhance athletic endurance, GW501516 and PPARb/d activators are listed as substances banned by the World Anti-doping agency (WADA). WADA also released an unprecedented alert to highlight these cancer findings:
(https://www.wada-ama.org/en/media/news/2013-03/wada-issues-alert-on-gw501516)
A quick internet search alone will tell you that unlicensed black market GW501516 (also called GW-501,516, GW1516, GSK-516 and on the black market as Endurobol or Cardarine) is being sold and used by bodybuilders and athletes; with at least 5 athletes being caught with in in their system.
Although short term use in humans has not shown these signs - only very low numbers of subjects have ever been monitored. The long term consequences of taking GW501516 are not known, but the strength of the pre-clinical findings in rodents is a major cause for concern that the findings will be reproducible in time in the human population.