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Targeting Gα₁₃-integrin interaction ameliorates systemic inflammation.

Ni Cheng¹, Yaping Zhang¹, M Keegan Delaney^1,2

¹Department of Pharmacology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA.

Nature Communications

|May 28, 2021

Summary

This summary is machine-generated.

MB2mP6 peptide nanoparticles effectively treat severe sepsis by targeting Gα13 signaling, inhibiting both inflammation and thrombosis without causing bleeding. This dual action significantly improves survival rates in mouse models of sepsis.

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Systematic Scoring Analysis for Intestinal Inflammation in a Murine Dextran Sodium Sulfate-Induced Colitis Model

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Published on: February 14, 2021

Area of Science:

Biomedical Science
Immunology
Hematology

Background:

Sepsis involves excessive inflammation and thrombosis, a thrombo-inflammatory state inadequately treated by current drugs.
Current therapies fail to address the dual nature of inflammation and thrombosis in sepsis, often leading to vascular leakage or hemorrhage.

Purpose of the Study:

To investigate the efficacy of MB2mP6 peptide nanoparticles in treating systemic inflammation and thrombosis in sepsis.
To explore the role of Gα13 signaling in leukocytes and platelets during sepsis-induced thrombo-inflammation.

Main Methods:

Utilized MB2mP6 peptide nanoparticles targeting Gα13-mediated integrin signaling in a mouse model of severe sepsis.
Assessed the impact of MB2mP6 on inflammation, thrombosis, vascular leakage, and survival.
Employed Gα13 knockout mice (platelet-specific, leukocyte-specific, and dual) to elucidate the roles of Gα13 in different cell types.

Main Results:

MB2mP6 nanoparticles inhibited both sepsis-induced inflammation and thrombosis without causing hemorrhage.
MB2mP6 treatment significantly improved survival in mice with severe sepsis.
Genetic ablation of Gα13 in platelets or leukocytes partially improved survival, while dual knockout mimicked the therapeutic effect of MB2mP6.

Conclusions:

Systemic inflammation and thrombosis independently contribute to sepsis mortality and exacerbate each other.
Targeting Gα13 signaling offers a novel therapeutic strategy for dual anti-inflammatory and anti-thrombotic action in sepsis.
MB2mP6 represents a promising therapeutic concept for sepsis, providing combined benefits without adverse vascular effects.