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Role of interleukin-6 levels in cardiovascular autonomic dysfunction in type 2 diabetic patients

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European Journal of Nuclear Medicine and Molecular Imaging Aims and scope Submit manuscript

Abstract

Purpose

Increased serum interleukin-6 (IL-6) levels are associated with an increased risk of cardiovascular disease, and cardiovascular autonomic dysfunction is associated with high mortality in type 2 diabetic patients. However, the relationship between IL-6 levels and cardiovascular autonomic dysfunction has not been fully elucidated. The aim of this study was to determine whether serum IL-6 levels are associated with cardiovascular autonomic dysfunction in type 2 diabetic patients.

Methods

Eighty type 2 diabetic patients who did not have organic heart disease were categorized into a high IL-6 group (>2.5 pg/ml, n = 40, age 59 ± 12 years) or a non-high IL-6 group (<2.5 pg/ml, n = 40, 61 ± 12 years). Cardiac autonomic function was assessed by baroreflex sensitivity, heart rate variability, plasma norepinephrine concentrations and 123I-metaiodobenzylguanidine (MIBG) scintigraphy.

Results

The body mass index values (BMI), fasting insulin levels and homeostasis model assessment index values were higher in the high IL-6 group than in the non-high IL-6 group (p < 0.01). Early and delayed 123I-MIBG myocardial uptake values were lower (p < 0.01), and the percent washout rate of 123I-MIBG was higher (p < 0.05) in the high IL-6 group than in the non-high IL-6 group. Furthermore, multiple regression analysis revealed that the IL-6 level was independently predicted by the BMI and the myocardial uptake of 123I-MIBG during the delayed phase.

Conclusions

The results indicate that elevated IL-6 levels are associated with depressed cardiovascular autonomic function and obesity in type 2 diabetic patients.

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Authors and Affiliations

  1. Department of Internal Medicine 1, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yuhu, Oita, 879-5593, Japan

    Tetsuji Shinohara, Naohiko Takahashi, Tetsuya Kakuma, Masahide Hara & Hironobu Yoshimatsu

  2. Department of Cardiovascular Science, Oita University, Oita, Japan

    Kunio Yufu, Futoshi Anan, Mikiko Nakagawa & Tetsunori Saikawa

Authors
  1. Tetsuji Shinohara
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  2. Naohiko Takahashi
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  3. Kunio Yufu
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  4. Futoshi Anan
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  5. Tetsuya Kakuma
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  6. Masahide Hara
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Correspondence to Tetsuji Shinohara.

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Shinohara, T., Takahashi, N., Yufu, K. et al. Role of interleukin-6 levels in cardiovascular autonomic dysfunction in type 2 diabetic patients. Eur J Nucl Med Mol Imaging 35, 1616–1623 (2008). https://doi.org/10.1007/s00259-008-0809-y

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  • DOI: https://doi.org/10.1007/s00259-008-0809-y

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