Dataset Information

C-reactive protein haplotypes and dispositional optimism in obese and nonobese elderly subjects.

ABSTRACT:

Background

Chronic low-grade inflammation, characterized by elevated plasma levels of C-reactive protein (CRP), has been inversely associated with dispositional optimism. Using a Mendelian randomization design, this study explores whether CRP haplotypes that determine CRP plasma levels are also associated with dispositional optimism.

Methods

In a sample of 1,084 community-dwelling subjects (aged 60-85 years) from three cohort studies (Arnhem Elderly Study, n = 426; Leiden Longevity Study, n = 355; Zutphen Elderly Study, n = 303), six CRP polymorphisms (rs2808628, rs2808630, rs1205, rs1800947, rs1417938, and rs3091244) coding for five common haplotypes were genotyped. The association of CRP haplotypes with CRP plasma levels and dispositional optimism was analyzed using multivariable linear regression models. Subanalyses were stratified by body mass index (BMI ?25 kg/m(2)).

Results

CRP haplotypes determined CRP plasma levels (adjusted ? = 0.094, p < 0.001). In the whole group, no association was found between CRP haplotypes and dispositional optimism scores (adjusted ? = -0.02, p = 0.45). In BMI strata, CRP haplotypes were associated with increasing levels of plasma CRP levels (adjusted ? = 0.112; p = 0.002) and lower dispositional optimism levels (adjusted ? = -0.068; p = 0.03) in the obese group only.

Conclusions

These results suggest that genetically increased CRP levels are involved in low dispositional optimism, but only in case of obesity.

SUBMITTER: Rius-Ottenheim N

PROVIDER: S-EPMC3249168 | biostudies-literature | 2012 Jan

REPOSITORIES: biostudies-literature

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Publications

C-reactive protein haplotypes and dispositional optimism in obese and nonobese elderly subjects.

Rius-Ottenheim Nathaly N de Craen Anton J M AJ Geleijnse Johanna M JM Slagboom P Eline PE Kromhout Daan D van der Mast Roos C RC Zitman Frans G FG Westendorp Rudi G RG Giltay Erik J EJ

Inflammation research : official journal of the European Histamine Research Society ... [et al.] 20111007 1

<h4>Background</h4>Chronic low-grade inflammation, characterized by elevated plasma levels of C-reactive protein (CRP), has been inversely associated with dispositional optimism. Using a Mendelian randomization design, this study explores whether CRP haplotypes that determine CRP plasma levels are also associated with dispositional optimism.<h4>Methods</h4>In a sample of 1,084 community-dwelling subjects (aged 60-85 years) from three cohort studies (Arnhem Elderly Study, n = 426; Leiden Longevit ...[more]

PMID: 21979869

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Project description:Higher levels of optimism have been linked with positive health behaviors, biological processes, and health conditions that are potentially protective against cognitive impairment in older adults. However, the association between optimism and cognitive impairment has not been directly investigated. We examined whether optimism is associated with incident cognitive impairment in older adults.Data are from the Health and Retirement Study. Optimism was measured by using the Life Orientation Test-R and cognitive impairment with a modified version of the Telephone Interview for Cognitive Status derived from the Mini-Mental State Examination. Using multiple logistic regression models, we prospectively assessed whether optimism was associated with incident cognitive impairment in 4624 adults 65 years and older during a 4-year period.Among participants, 312 women and 190 men developed cognitive impairment during the 4-year follow-up. Higher optimism was associated with decreased risk of incident cognitive impairment. When adjusted for sociodemographic factors, each standard deviation increase in optimism was associated with reduced odds (odds ratio [OR] = 0.70, 95% confidence interval [CI] = 0.61-0.81) of becoming cognitively impaired. A dose-response relationship was observed. Compared with those with the lowest levels of optimism, people with moderate levels had somewhat reduced odds of cognitive impairment (OR = 0.78, 95% CI = 0.59-1.03), whereas people with the highest levels had the lowest odds of cognitive impairment (OR = 0.52, 95% CI = 0.36-0.74). These associations remained after adjusting for health behaviors, biological factors, and psychological covariates that could either confound the association of interest or serve on the pathway.Optimism was prospectively associated with a reduced likelihood of becoming cognitively impaired. If these results are replicated, the data suggest that potentially modifiable aspects of positive psychological functioning such as optimism play an important role in maintaining cognitive functioning.

Dataset Information

C-reactive protein haplotypes and dispositional optimism in obese and nonobese elderly subjects.

Background

Methods

Results

Conclusions

Publications

C-reactive protein haplotypes and dispositional optimism in obese and nonobese elderly subjects.

Similar Datasets

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