Access to exercise and its relation to cardiovascular health and gene expression in laboratory animals.
The interaction between genes and environment can influence cardiovascular disease (CVD). This 16 month study investigated if genes associated with cardiovascular (CV) regulation were expressed differently in animals having: 1) no access to physical activity or exercise (SED), 2) access to hour-long, twice weekly activity (PA), and 3) access every-other-day to a running wheel (EX). Out of 31,000 genes, a CV subset comprising 44 genes was investigated. Ten genes from this subset were expressed differently in EX compared with SED, and 34 genes were expressed differently in PA compared with SED (p<0.05). Total cholesterol (70+/-8 vs. 101+/-9 mg dl(-1)), triglycerides (104+/-8 vs. 127+/-4 mg dl(-1)), resting systolic blood pressure (130+/-3 vs. 141+/-3 mmHg), mean arterial pressure (110+/-2 vs. 120+/-2 mmHg) and heart rate (380+/-6 vs. 405+/-9 beats min(-1)) were lower in EX compared with SED (p<0.05), but intracellular adhesion molecule levels did not differ among groups. Mean gene expressions for Gja1, Fdft1, Edn1, Cd36, and Hmgb2 differed in animals according to access to physical activity. These genes play roles in heart rate, cholesterol biosynthesis, blood pressure, cell adhesion, and transcription and neurogenesis regulation, respectively. In conclusion, a total of 44 CV genes were expressed differently in SED compared to PA and EX; and SED showed more physiological evidence of CVD.
Department of Zoology, Miami University, Oxford, OH 45056, USA.
Natalie B
NB
Schweitzer
Helaine M
HM
Alessio
Ann E
AE
Hagerman
Sashwati
S
Roy
Chandan K
CK
Sen
Szilvia
S
Nagy
Robyn N
RN
Byrnes
Ben N
BN
Philip
Jane L
JL
Woodward
Ronald L
RL
Wiley
D000818:Animals; D001794:Blood Pressure; D018955:CD36 Antigens / Q000378:metabolism; D002320:Cardiovascular Physiological Phenomena; D015815:Cell Adhesion Molecules / Q000378:metabolism; D002784:Cholesterol / Q000097:blood; D015870:Gene Expression; D005796:Genes / Q000235:genetics*; D024261:HMGB2 Protein / Q000378:metabolism; D006339:Heart Rate; D008297:Male; D046228:Microarray Analysis; D010805:Physical Conditioning, Animal / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014280:Triglycerides / Q000097:blood
D018955:CD36 Antigens; D015815:Cell Adhesion Molecules; D024261:HMGB2 Protein; D014280:Triglycerides; D002784:Cholesterol