Role of high-mobility group box 1 protein in post-infarction healing process and left ventricular remodelling

Takashi Kohno, Toshihisa Anzai, Kotaro Naito, Taku Miyasho, Minoru Okamoto, Hiroshi Yokota, Shingo Yamada, Yuichiro Maekawa, Toshiyuki Takahashi, Tsutomu Yoshikawa, Akitoshi Ishizaka, Satoshi Ogawa

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120 Citations (Scopus)

Abstract

Aims: High-mobility group box 1 protein (HMGB1) is one of the recently defined damage-associated molecular pattern molecules derived from necrotic cells and activated macrophages. We investigated clinical implications of serum HMGB1 elevation in patients with acute myocardial infarction (MI). Then, we evaluated the effect of HMGB1 blockade on post-MI left ventricular (LV) remodelling in a rat MI model. Methods and results: Serum HMGB1 levels were examined in patients with ST-elevation MI (n = 35). A higher peak serum HMGB1 level was associated with pump failure, cardiac rupture, and in-hospital cardiac death. Then, an experimental MI model was induced in male Wistar rats. The mRNA and protein expression of HMGB1 were increased in the infarcted area compared with those values observed in sham-operated rats. We administered neutralizing anti-HMGB1 antibody (MI/anti-H) or control antibody (MI/C) to MI rats subcutaneously for 7 days. The mRNA levels of tumour necrosis factor-α and interleukin-1β and the number of macrophages in the infarcted area were reduced on day 3 in MI/anti-H rats compared with MI/C rats. Interestingly, HMGB1 blockade resulted in thinning and expansion of the infarct scar and marked hypertrophy of the non-infarcted area on day 14. Conclusion: Elevated serum HMGB1 levels were associated with adverse clinical outcomes in patients with MI. However, HMGB1 blockade in a rat MI model aggravated LV remodelling, possibly through impairment of the infarct-healing process. HMGB1, a novel predictor of adverse clinical outcomes after MI, may have an essential role in the appropriate healing process after MI.

Original languageEnglish
Pages (from-to)565-573
Number of pages9
JournalCardiovascular Research
Volume81
Issue number3
DOIs
Publication statusPublished - 2009 Feb 1

Keywords

  • Cytokines
  • Heart failure
  • Infarction
  • Infection/inflammation
  • Remodelling

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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    Kohno, T., Anzai, T., Naito, K., Miyasho, T., Okamoto, M., Yokota, H., Yamada, S., Maekawa, Y., Takahashi, T., Yoshikawa, T., Ishizaka, A., & Ogawa, S. (2009). Role of high-mobility group box 1 protein in post-infarction healing process and left ventricular remodelling. Cardiovascular Research, 81(3), 565-573. https://doi.org/10.1093/cvr/cvn291