Repeated remote ischemic conditioning attenuates left ventricular remodeling via exosome-mediated intercellular communication on chronic heart failure after myocardial infarction

Takehiro Yamaguchi, Yasukatsu Izumi, Yasuhiro Nakamura, Takanori Yamazaki, Masayuki Shiota, Soichi Sano, Masako Tanaka, Mayuko Osada-Oka, Kenei Shimada, Katuyuki Miura, Minoru Yoshiyama, Hiroshi Iwao

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Background Remote ischemic conditioning (RIC) by repeated treatment of transient limb ischemia is a clinically applicable method for protecting the heart against injury at the time of reperfusion. In this study, we investigated the effects of repeated RIC on cardiac dysfunction after myocardial infarction (MI).

Methods and results At 4 weeks after MI, rats were separated into the untreated (UT) group or the RIC-treated group. RIC treatment was performed by 5 cycles of 5 min of bilateral hindlimb ischemia and 5 min of reperfusion once a day for 4 weeks. Despite comparable MI size, left ventricular (LV) ejection fraction (LVEF) was significantly improved in the RIC group compared with the UT group. Furthermore, the LVEF in the RIC group was improved, although not significantly, after treatment. RIC treatment also prevented the deterioration of LV diastolic function. MI-induced LV interstitial fibrosis in the boundary region and oxidant stress were significantly attenuated by RIC treatment. MicroRNA-29a (miR-29a), a key regulator of tissue fibrosis, was highly expressed in the exosomes and the marginal area of the RIC group. Even in the differentiated C2C12-derived exosomes, miR-29a expression was significantly increased under hypoxic condition. As well as miR-29a, insulin-like growth factor 1 receptor (IGF-1R) was highly expressed both in the exosomes and remote non-infarcted myocardium of the RIC group. IGF-1R expression was also increased in the C2C12-derived exosomes under hypoxic conditions.

Conclusions Repeated RIC reduces adverse LV remodeling and oxidative stress by MI. Exosome-mediated intercellular communication may contribute to the beneficial effect of RIC treatment.

Original languageEnglish
Pages (from-to)239-246
Number of pages8
JournalInternational Journal of Cardiology
Volume178
DOIs
Publication statusPublished - 2015 Jan 15
Externally publishedYes

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Exosomes
Ventricular Remodeling
Heart Failure
Myocardial Infarction
MicroRNAs
Somatomedin Receptors
Reperfusion
Fibrosis
Ischemia
Heart Injuries
Hindlimb
Left Ventricular Function
Oxidants
Stroke Volume
Myocardium
Oxidative Stress
Extremities

Keywords

  • Exosomes
  • Left ventricular dysfunction
  • MicroRNA
  • Myocardial infarction
  • Remote ischemic conditioning

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Medicine(all)

Cite this

Repeated remote ischemic conditioning attenuates left ventricular remodeling via exosome-mediated intercellular communication on chronic heart failure after myocardial infarction. / Yamaguchi, Takehiro; Izumi, Yasukatsu; Nakamura, Yasuhiro; Yamazaki, Takanori; Shiota, Masayuki; Sano, Soichi; Tanaka, Masako; Osada-Oka, Mayuko; Shimada, Kenei; Miura, Katuyuki; Yoshiyama, Minoru; Iwao, Hiroshi.

In: International Journal of Cardiology, Vol. 178, 15.01.2015, p. 239-246.

Research output: Contribution to journalArticle

Yamaguchi, Takehiro ; Izumi, Yasukatsu ; Nakamura, Yasuhiro ; Yamazaki, Takanori ; Shiota, Masayuki ; Sano, Soichi ; Tanaka, Masako ; Osada-Oka, Mayuko ; Shimada, Kenei ; Miura, Katuyuki ; Yoshiyama, Minoru ; Iwao, Hiroshi. / Repeated remote ischemic conditioning attenuates left ventricular remodeling via exosome-mediated intercellular communication on chronic heart failure after myocardial infarction. In: International Journal of Cardiology. 2015 ; Vol. 178. pp. 239-246.
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abstract = "Background Remote ischemic conditioning (RIC) by repeated treatment of transient limb ischemia is a clinically applicable method for protecting the heart against injury at the time of reperfusion. In this study, we investigated the effects of repeated RIC on cardiac dysfunction after myocardial infarction (MI).Methods and results At 4 weeks after MI, rats were separated into the untreated (UT) group or the RIC-treated group. RIC treatment was performed by 5 cycles of 5 min of bilateral hindlimb ischemia and 5 min of reperfusion once a day for 4 weeks. Despite comparable MI size, left ventricular (LV) ejection fraction (LVEF) was significantly improved in the RIC group compared with the UT group. Furthermore, the LVEF in the RIC group was improved, although not significantly, after treatment. RIC treatment also prevented the deterioration of LV diastolic function. MI-induced LV interstitial fibrosis in the boundary region and oxidant stress were significantly attenuated by RIC treatment. MicroRNA-29a (miR-29a), a key regulator of tissue fibrosis, was highly expressed in the exosomes and the marginal area of the RIC group. Even in the differentiated C2C12-derived exosomes, miR-29a expression was significantly increased under hypoxic condition. As well as miR-29a, insulin-like growth factor 1 receptor (IGF-1R) was highly expressed both in the exosomes and remote non-infarcted myocardium of the RIC group. IGF-1R expression was also increased in the C2C12-derived exosomes under hypoxic conditions.Conclusions Repeated RIC reduces adverse LV remodeling and oxidative stress by MI. Exosome-mediated intercellular communication may contribute to the beneficial effect of RIC treatment.",
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T1 - Repeated remote ischemic conditioning attenuates left ventricular remodeling via exosome-mediated intercellular communication on chronic heart failure after myocardial infarction

AU - Yamaguchi, Takehiro

AU - Izumi, Yasukatsu

AU - Nakamura, Yasuhiro

AU - Yamazaki, Takanori

AU - Shiota, Masayuki

AU - Sano, Soichi

AU - Tanaka, Masako

AU - Osada-Oka, Mayuko

AU - Shimada, Kenei

AU - Miura, Katuyuki

AU - Yoshiyama, Minoru

AU - Iwao, Hiroshi

PY - 2015/1/15

Y1 - 2015/1/15

N2 - Background Remote ischemic conditioning (RIC) by repeated treatment of transient limb ischemia is a clinically applicable method for protecting the heart against injury at the time of reperfusion. In this study, we investigated the effects of repeated RIC on cardiac dysfunction after myocardial infarction (MI).Methods and results At 4 weeks after MI, rats were separated into the untreated (UT) group or the RIC-treated group. RIC treatment was performed by 5 cycles of 5 min of bilateral hindlimb ischemia and 5 min of reperfusion once a day for 4 weeks. Despite comparable MI size, left ventricular (LV) ejection fraction (LVEF) was significantly improved in the RIC group compared with the UT group. Furthermore, the LVEF in the RIC group was improved, although not significantly, after treatment. RIC treatment also prevented the deterioration of LV diastolic function. MI-induced LV interstitial fibrosis in the boundary region and oxidant stress were significantly attenuated by RIC treatment. MicroRNA-29a (miR-29a), a key regulator of tissue fibrosis, was highly expressed in the exosomes and the marginal area of the RIC group. Even in the differentiated C2C12-derived exosomes, miR-29a expression was significantly increased under hypoxic condition. As well as miR-29a, insulin-like growth factor 1 receptor (IGF-1R) was highly expressed both in the exosomes and remote non-infarcted myocardium of the RIC group. IGF-1R expression was also increased in the C2C12-derived exosomes under hypoxic conditions.Conclusions Repeated RIC reduces adverse LV remodeling and oxidative stress by MI. Exosome-mediated intercellular communication may contribute to the beneficial effect of RIC treatment.

AB - Background Remote ischemic conditioning (RIC) by repeated treatment of transient limb ischemia is a clinically applicable method for protecting the heart against injury at the time of reperfusion. In this study, we investigated the effects of repeated RIC on cardiac dysfunction after myocardial infarction (MI).Methods and results At 4 weeks after MI, rats were separated into the untreated (UT) group or the RIC-treated group. RIC treatment was performed by 5 cycles of 5 min of bilateral hindlimb ischemia and 5 min of reperfusion once a day for 4 weeks. Despite comparable MI size, left ventricular (LV) ejection fraction (LVEF) was significantly improved in the RIC group compared with the UT group. Furthermore, the LVEF in the RIC group was improved, although not significantly, after treatment. RIC treatment also prevented the deterioration of LV diastolic function. MI-induced LV interstitial fibrosis in the boundary region and oxidant stress were significantly attenuated by RIC treatment. MicroRNA-29a (miR-29a), a key regulator of tissue fibrosis, was highly expressed in the exosomes and the marginal area of the RIC group. Even in the differentiated C2C12-derived exosomes, miR-29a expression was significantly increased under hypoxic condition. As well as miR-29a, insulin-like growth factor 1 receptor (IGF-1R) was highly expressed both in the exosomes and remote non-infarcted myocardium of the RIC group. IGF-1R expression was also increased in the C2C12-derived exosomes under hypoxic conditions.Conclusions Repeated RIC reduces adverse LV remodeling and oxidative stress by MI. Exosome-mediated intercellular communication may contribute to the beneficial effect of RIC treatment.

KW - Exosomes

KW - Left ventricular dysfunction

KW - MicroRNA

KW - Myocardial infarction

KW - Remote ischemic conditioning

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