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Related Experiment Video

Updated: Oct 6, 2025

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Hyperlipidemic plasma molecules bind and inhibit adiponectin activity.

Yan-Qing Zhang1, Sen Fan2, Wen-Qing Wang3

  • 1Department of Anesthesiology, School of Anesthesiology, The First Hospital, Shanxi Medical University, Taiyuan, China.

Journal of Diabetes Investigation
|January 13, 2022
PubMed
Summary

Hyperlipidemic plasma contains proteins that inhibit adiponectin (APN) function, causing adiponectin resistance in early diabetes. Apolipoprotein A1 (APO A1) and Apolipoprotein C1 (APOC1) were identified as key inhibitors.

Keywords:
AdiponectinDiabetic vascular injuryHyperlipidemia

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Area of Science:

  • Cardiovascular Biology
  • Metabolic Syndrome
  • Lipid Metabolism

Background:

  • Adiponectin (APN) is a crucial vascular protective molecule.
  • Adiponectin resistance is observed in early diabetes, but its mechanisms are unclear.
  • Hyperlipidemic plasma may contain factors that inhibit APN function.

Purpose of the Study:

  • To identify hyperlipidemic plasma molecules that bind and inhibit adiponectin (APN) function.
  • To investigate the role of these molecules in adiponectin resistance and diabetic vascular injury.

Main Methods:

  • Adult rats were fed high-fat diets to induce hyperlipidemia.
  • Plasma was analyzed using mass spectrometry after co-immunoprecipitation with anti-APN antibody.
  • The inhibitory effects of identified binding molecules on APN activity were assessed in HUVECs.

Main Results:

  • High-fat diet increased plasma triglyceride, total cholesterol, and LDL, with elevated APN levels.
  • Mass spectrometry identified 18 proteins with increased APN binding; APOA1 and APOC1 were key.
  • APOA1 and APOC1 significantly inhibited APN activity, evidenced by reduced AMPK activation.

Conclusions:

  • Increased APOA1 and APOC1 in hyperlipidemic plasma bind and inhibit APN activity.
  • This identifies a novel mechanism for adiponectin resistance in early diabetes.
  • Provides new insights into the complex roles of high-density lipoprotein.