Mechanism of Qili Qiangxin Capsule for Heart Failure Based on miR133a-Endoplasmic Reticulum Stress

© 2024. The Chinese Journal of Integrated Traditional and Western Medicine Press and Springer-Verlag GmbH Germany, part of Springer Nature..

OBJECTIVE: To investigate the pharmacological mechanism of Qili Qiangxin Capsule (QLQX) improvement of heart failure (HF) based on miR133a-endoplasmic reticulum stress (ERS) pathway.

METHODS: A left coronary artery ligation-induced HF after myocardial infarction model was used in this study. Rats were randomly assigned to the sham group, the model group, the QLQX group [0.32 g/(kg·d)], and the captopril group [2.25 mg/(kg·d)], 15 rats per group, followed by 4 weeks of medication. Cardiac function such as left ventricular ejection fraction (EF), fractional shortening (FS), left ventricular systolic pressure (LVSP), left ventricular end diastolic pressure (LVEDP), the maximal rate of increase of left ventricular pressure (+dp/dt max), and the maximal rate of decrease of left ventricular pressure (-dp/dt max) were monitored by echocardiography and hemodynamics. Hematoxylin and eosin (HE) and Masson stainings were used to visualize pathological changes in myocardial tissue. The mRNA expression of miR133a, glucose-regulated protein78 (GRP78), inositol-requiring enzyme 1 (IRE1), activating transcription factor 6 (ATF6), X-box binding protein1 (XBP1), C/EBP homologous protein (CHOP) and Caspase 12 were detected by RT-PCR. The protein expression of GRP78, p-IRE1/IRE1 ratio, cleaved-ATF6, XBP1-s (the spliced form of XBP1), CHOP and Caspase 12 were detected by Western blot. TdT-mediated dUTP nick-end labeling (TUNEL) staining was used to detect the rate of apoptosis.

RESULTS: QLQX significantly improved cardiac function as evidenced by increased EF, FS, LVSP, +dp/dt max, -dp/dt max, and decreased LVEDP (P<0.05, P<0.01). HE staining showed that QLQX ameliorated cardiac pathologic damage to some extent. Masson staining indicated that QLQX significantly reduced collagen volume fraction in myocardial tissue (P<0.01). Results from RT-PCR and Western blot showed that QLQX significantly increased the expression of miR133a and inhibited the mRNA expressions of GRP78, IRE1, ATF6 and XBP1, as well as decreased the protein expressions of GRP78, cleaved-ATF6 and XBP1-s and decreased p-IRE1/IRE1 ratio (P<0.05, P<0.01). Further studies showed that QLQX significantly reduced the expression of CHOP and Caspase12, resulting in a significant reduction in apoptosis rate (P<0.05, P<0.01).

CONCLUSION: The pharmacological mechanism of QLQX in improving HF is partly attributed to its regulatory effect on the miR133a-IRE1/XBP1 pathway.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:30

Enthalten in:

Chinese journal of integrative medicine - 30(2024), 5 vom: 01. Apr., Seite 398-407

Sprache:

Englisch

Beteiligte Personen:

Ji, Xiao-di [VerfasserIn]
Yang, Ding [VerfasserIn]
Cui, Xi-Yuan [VerfasserIn]
Lou, Li-Xia [VerfasserIn]
Nie, Bo [VerfasserIn]
Zhao, Jiu-Li [VerfasserIn]
Zhao, Ming-Jing [VerfasserIn]
Wu, Ai-Ming [VerfasserIn]

Links:

Volltext

Themen:

Activating Transcription Factor 6
Apoptosis
Capsules
Caspase 12
Drugs, Chinese Herbal
EC 2.7.11.1
EC 3.4.22.-
Endoplasmic Reticulum Chaperone BiP
Endoplasmic reticulum stress
GRP78 protein, rat
Heart failure
Heat-Shock Proteins
Journal Article
MIRN133 microRNA, rat
MiR133a
MicroRNAs
Protein Serine-Threonine Kinases
Qili Qiangxin Capsule
Qiliqiangxin
X-Box Binding Protein 1

Anmerkungen:

Date Completed 23.04.2024

Date Revised 23.04.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1007/s11655-024-3654-3

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM368762629