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Association of extracellular heat shock protein 70 and insulin resistance in type 2 diabetes; independent of obesity and C-reactive protein

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Cell Stress and Chaperones Aims and scope

Abstract

Despite few studies on intracellular heat shock protein70, the clinical association between insulin resistance and extracellular heat shock protein70 (eHSP70) is not well studied. In the current study, we examined the association between homeostatic model assessment-insulin resistance (HOMA-IR) and eHSP70 in patients with type 2 diabetes (T2DM) and healthy controls. A total of 145 patients with T2DM and 41 matched healthy controls were selected. Patients and controls were divided based on waist circumference (WC) to two groups, and eHSP70 was compared between them. The association between HOMA-IR and eHSP70 was examined using regression models adjusted for age, high-sensitive C-reactive protein (hs-CRP), and central obesity as confounding factors. While eHSP70 and hs-CRP were significantly correlated with HOMA-IR in patients with T2DM (p = 0.032, 0.025, respectively), there was no correlation between eHSP70 and HOMA-IR in the control group. Extracellular HSP70 and hs-CRP were not correlated in healthy controls. But a significant association appeared between eHSP70 and hs-CRP in patients with T2DM (p = 0.05). Both BMI and WC were not correlated with eHSP70 in both groups. Extracellular HSP70 was positively associated with HOMA-IR in patients with T2DM, independent from hs-CRP and obesity. We also showed eHSP70 levels remained unchanged through increase in BMI or WC in patients with T2D and in healthy controls. Our findings suggest that eHSP70 may contribute to the pathogenesis of T2DM by increasing insulin resistance.

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Acknowledgements

The authors wish to thank patients for their participation and kind cooperation.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Author notes

  1. Hamid Alemi and Pegah Khaloo contributed equally to this work.

Authors and Affiliations

  1. Endocrinology and Metabolism Research Center (EMRC), Vali-Asr Hospital, School of Medicine, Tehran University of Medical Sciences, P.O. Box: 13145-784, Tehran, Iran

    Hamid Alemi, Pegah Khaloo, Soghra Rabizadeh, Hossein Mirmiranpour, Salome Sadat Salehi, Alireza Esteghamati & Manouchehr Nakhjavani

  2. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

    Mohammad Ali Mansournia

Authors
  1. Hamid Alemi
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  2. Pegah Khaloo
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  3. Soghra Rabizadeh
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  4. Mohammad Ali Mansournia
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  5. Hossein Mirmiranpour
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  6. Salome Sadat Salehi
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  7. Alireza Esteghamati
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  8. Manouchehr Nakhjavani
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Contributions

The authors’ contributions are listed below:

• Conception or design of the work: Hamid Alemi, Pegah Khaloo, Manouchehr Nakhjavani

• Data analysis and interpretation: Mohammad Ali Mansournia, Hamid Alemi

• Drafting the article: Pegah Khaloo, Hamid Alemi, SoghraRabizadeh

• Critical revision of the article: ManouchehrNakhjavani, Hossein Mirmiranpour, Salome Sadat Salehi, Alireza Esteghamati

All the authors approved the final version and have the agreement to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

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Correspondence to Manouchehr Nakhjavani.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Alemi, H., Khaloo, P., Rabizadeh, S. et al. Association of extracellular heat shock protein 70 and insulin resistance in type 2 diabetes; independent of obesity and C-reactive protein. Cell Stress and Chaperones 24, 69–75 (2019). https://doi.org/10.1007/s12192-018-0942-x

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  • DOI: https://doi.org/10.1007/s12192-018-0942-x

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