The effect of social environment on markers of vascular oxidative stress and inflammation in the Watanabe heritable hyperlipidemic rabbit.

Abstract:

OBJECTIVE:Previous research demonstrated that social environment can influence progression of atherosclerosis in the Watanabe Heritable Hyperlipidemic (WHHL) rabbit. This study examined the effect of social environment on markers of oxidative stress and inflammation to clarify the physiological pathways potentially responsible for the influence of social environment on disease. METHODS AND RESULTS:WHHL rabbits were assigned to 1 of 3 social groups: an unstable group, in which unfamiliar rabbits were paired daily, with the pairing switched each week; a stable group, in which littermates were paired daily; and an individually-caged group. The stable group engaged in more affiliative social behavior than the unstable group. The unstable group showed more agonistic behavior compared with the stable group and higher C-reactive protein levels than the individually caged group. The individually caged group was behaviorally sedentary, had higher 24-hour urinary catecholamine levels than the other groups, and exhibited higher NAD(P)H-oxidase activity in the aortic arch relative to the stable group. CONCLUSIONS:The results suggest that social environment creates distinct behavioral contexts that can affect markers of inflammation and oxidative stress early in the development of atherosclerosis. Specifically, physical inactivity associated with individual caging affects indices of oxidative stress and inflammation. These pathophysiological markers may help to explain behaviorally related differences in the extent of atherosclerosis observed in prior studies.

journal_name

Psychosom Med

journal_title

Psychosomatic medicine

authors

Nation DA,Gonzales JA,Mendez AJ,Zaias J,Szeto A,Brooks LG,Paredes J,D'Angola A,Schneiderman N,McCabe PM

doi

10.1097/PSY.0b013e3181646753

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

269-75

issue

3

eissn

0033-3174

issn

1534-7796

pii

PSY.0b013e3181646753

journal_volume

70

pub_type

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