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Author Spotlight: Investigating the Underlying Mechanisms of Right Ventricular Failure in Pulmonary Hypertension
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Author Spotlight: Investigating the Underlying Mechanisms of Right Ventricular Failure in Pulmonary Hypertension

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Magnesium lithospermate B improves pulmonary artery banding induced right ventricular dysfunction by alleviating

Chen Qu1, Ying Xu2, Xilan Yang3

  • 1Department of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China; Nanjing Medical University, Nanjing, Jiangsu, China.

Pulmonary Pharmacology & Therapeutics
|August 14, 2020
PubMed
Abstract

Insights

Magnesium lithospermate B (MLB) protects against heart failure by reducing inflammation and fibrosis through the p38MAPK pathway. This natural compound shows therapeutic potential for right ventricular dysfunction.

Area of Science:

  • Cardiovascular Research
  • Pharmacology
  • Molecular Biology

Background:

  • Magnesium lithospermate B (MLB), a component of Salvia miltiorrhiza, possesses anti-inflammatory and anti-fibrotic properties beneficial for heart disease.
  • Substance P (SP) is a neuropeptide elevated in heart failure, promoting inflammation and immune responses.

Purpose of the Study:

  • To investigate the protective effects of MLB against pulmonary artery banding (PAB) induced right ventricular (RV) dysfunction.
  • To elucidate the role of the p38MAPK pathway in MLB's therapeutic actions on RV dysfunction.

Main Methods:

  • A mouse model of PAB was established and treated with MLB and a p38MAPK activator.
  • Echocardiography, biochemical assays for inflammatory cytokines and fibrosis markers, and immunoblotting were performed.
  • In vitro studies assessed MLB's effects on SP-stimulated macrophages and cardiac fibroblasts.

Main Results:

  • MLB treatment preserved RV function, reduced RV inflammation and fibrosis, and partially reversed p38MAPK activation.
  • The p38MAPK activator negated MLB's protective effects, indicating pathway involvement.
  • MLB reversed SP-induced inflammatory cytokine release, macrophage proliferation, and fibroblast fibrosis in vitro.

Conclusions:

  • MLB ameliorates PAB-induced right ventricular remodeling by suppressing inflammation via the p38MAPK pathway.
  • MLB demonstrates significant therapeutic potential for patients suffering from right ventricular dysfunction.
Keywords:
InflammationMagnesium lithospermate BPulmonary artery bandingRight ventricular dysfunctionp38MAPK pathway

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