Circulating Lp-PLA2 activity correlates with oxidative stress and cytokines in overweight/obese postmenopausal women not using hormone replacement therapy

Jean Kyung Paik, Minkyung Kim, Minjoo Kim, Yuna Yen, Hyeon Yeong Ahn, Sang Hyun Lee, Jong Ho Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Controversy remains regarding whether there is an association between circulating lipoprotein-associated phospholipase A2 (Lp-PLA2), cytokines, and oxidative stress in healthy postmenopausal women. We investigated the influence of age on Lp-PLA2 activity in postmenopausal women not using hormone therapy and the relationship of Lp-PLA2 enzyme activity to serum cytokine levels and oxidative stress indices. Normal weight (n = 1284) and overweight/obese (n = 707) postmenopausal women not using hormone therapy were categorized into five age groups: 50–54, 55–59, 60–64, 65–69, and 70–89 years. Overweight-obese women showed higher plasma Lp-PLA2 activity, urinary 8-epi-prostaglandin F (8-epi-PGF), serum interleukin (IL)-6, and smaller LDL particles than normal-weight women after adjusting for age, years postmenopause, smoking, drinking, blood pressure, glucose, insulin, lipid profiles, BMI, and waist circumference. Overweight/obese women 70–89 years old showed higher Lp-PLA2 activity than those aged 50–54 years, whereas no significant difference in Lp-PLA2 activity existed across normal-weight female age groups. Overweight/obese women aged ≥65 years showed higher Lp-PLA2, oxidized LDL (ox-LDL), IL-6, and 8-epi-PGF than age-matched normal-weight controls. Overweight/obese women aged ≥70 years had higher ox-LDL levels than those aged 50–59, and overweight/obese women aged 65–89 showed higher IL-6 and 8-epi-PGF. There were strong positive correlations between Lp-PLA2 and ox-LDL (r = 0.385, P < 0.001), Lp-PLA2 and IL-6 (r = 0.293, P < 0.001), and ox-LDL and IL-6 (r = 0.303, P < 0.001) in overweight/obese women; however, these relationships were weak in normal-weight women. These results suggest that aging and obesity-related oxidative and inflammatory mediators are associated with Lp-PLA2 activity in overweight/obese postmenopausal women not using hormone therapy.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalAge
Volume37
Issue number2
DOIs
Publication statusPublished - 2015 Apr 1

All Science Journal Classification (ASJC) codes

  • Ageing
  • Geriatrics and Gerontology

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