High phobic anxiety is related to lower leukocyte telomere length in women.
BACKGROUND
Chronic psychological distress has been linked to shorter telomeres, an indication of accelerated aging. Yet, little is known about relations of anxiety to telomeres. We examined whether a typically chronic form of anxiety--phobic anxiety--is related to telomere length.


RESULTS
Relative telomere lengths (RTLs) in peripheral blood leukocytes were measured by quantitative real-time polymerase chain reaction among 5,243 women (aged 42-69 years) who: were participants in the Nurses' Health Study; were controls in prior case-control studies of telomeres and disease, or randomly selected healthy participants in a cognitive function sub-study; had completed the Crown-Crisp phobic index proximal to blood collection. Adjusted least-squares mean RTLs (z-scores) were calculated across phobic categories. Higher phobic anxiety was generally associated with lower RTLs (age-adjusted p-trend = 0.09); this association was similar after adjustment for confounders--paternal age-at-birth, smoking, body mass index (BMI) and physical activity (p-trend = 0.15). Notably, a threshold was identified. Among women with Crown-Crisp<6 points, the multivariable-adjusted least-squares mean RTL z-score = 0.02 standard units; however, among the most phobic women (Crown-Crisp ≥ 6), the multivariable-adjusted least-squares mean RTL z-score = -0.09 standard units (mean difference = -0.10 standard units; p = 0.02). The magnitude of this difference was comparable to that for women 6 years apart in age. Finally, effect modification by BMI, smoking and paternal age was observed: associations were stronger among highly phobic women with BMI ≥ 25 kg/m(2), without smoking history, or born to fathers aged ≥ 40 years.


CONCLUSIONS
In this large, cross-sectional study high phobic anxiety was associated with shorter telomeres. These results point toward prospective investigations relating anxiety to telomere length change.
Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America. olivia.okereke@channing.harvard.edu
Olivia I
OI
Okereke
Jennifer
J
Prescott
Jason Y Y
JY
Wong
Jiali
J
Han
Kathryn M
KM
Rexrode
Immaculata
I
De Vivo
D000328:Adult; D000368:Aged; D001008:Anxiety Disorders / Q000235:genetics*; D015992:Body Mass Index; D005260:Female; D006801:Humans; D016018:Least-Squares Analysis; D007962:Leukocytes / Q000378:metabolism*; D008875:Middle Aged; D010331:Paternal Age; D012907:Smoking / Q000235:genetics; D059505:Telomere Homeostasis / Q000235:genetics*