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A POSSIBLE CARDIO-PROTECTIVE ROLE OF EARLY REMOTE ISCHEMIA PRECONDITIONING AGAINST ISCHEMIA REPERFUSION INJURY IN ISOLATED HEARTS OF ADULT ALBINO RATS: POSSIBLE INVOLVEMENT OF HYP

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Last updated: 04 Jan 2025

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Abstract

Background: In spite of the claimed cardio-protective effects of ischemic preconditioning (IPC), it is invasive and so using remote ischemic preconditioning (RIPC) may offer an alternative. Meanwhile, RIPC cardio protective role is controversial, with an equivocal underlying mechanism. The hypoxia inducible factor 1 alpha (HIF-1-alpha) which is increased following ischemic insults is claimed as a humoral mediator for RIPC. Objectives: To investigate the effect of remote ischemic pre-conditioning on myocardial ischemia/reperfusion injury in rats, and to elucidate the possible role of hypoxia inducible factor in this protection. Patients and Methods: The present study was performed on 28 adult female albino rats in the same estrus cycle evaluated by vaginal smear, and they were allocated into 3 groups: Group I: control rats subjected to ischemic /reperfusion injury (I/R) only, group II: early RIPC rats (RIPC 2 hours prior to I/R), group III: acriflavine-treated early RIPC rats. Acriflavine is a drug that binds directly to HIF-1 alpha and HIF-2 alpha subunits, thus inhibiting its dimerization and transcriptional activity, and it was injected IP 10 days prior to RIPC. On sacrifice day, ECG was recorded and isolated heart studies were performed. Later, cardiac chambers weight, serum HIF-1-alpha, myocardial perfusate lactate dehydrogenase, and cardiac oxidative markers: Malonaldehyde and glutathione perioxidase were measured. Results: Compared to the control group, the early RIPC group showed significant increase in the heart rate (HR), QTc interval in the ECG recording, glutathione peroxidase and the HIF 1α levels together with reduction in the percent of decrease in PT and PT/LV, in the percent of prolongation in time to peak tension (TPT), perfusate lactate dehydrogenase and MDA levels, while no significant changes were recorded in the heart chronotropic activity, in the percent of half relaxation time (HRT) prolongation, or in the percent of decrease of MFR. Following acriflavine treatment, the effects of RIPC were abolished highlighting the role of HIF-1-alpha in mediating RIPC protective effects. Conclusion: The non-invasive and non-pharmological remote ischemic preconditioning technique can ameliorate the cardiac ischemic reperfusion injury with an obvious role of HIF-1α in mediating these protective effects.

DOI

10.12816/0052250

Keywords

Cardiac, remote ischemic preconditioning, ischemic reperfusion injury, Acriflavine, HIF-1α, Peak tension

Authors

First Name

Asmaa

Last Name

T. Ebrahim

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Affiliation

Department of Physiology, Faculty of Medicine, Ain Shams University

Email

dr.asmaa26tarek@yahoo.co.uk

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First Name

Bataa

Last Name

Mohamed EL Kafoury

MiddleName

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Affiliation

Department of Physiology, Faculty of Medicine, Ain Shams University

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Orcid

-

First Name

Manal

Last Name

S. Abd-El Hamid

MiddleName

-

Affiliation

Department of Physiology, Faculty of Medicine, Ain Shams University

Email

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City

-

Orcid

-

First Name

Rania

Last Name

Salah Mansour

MiddleName

-

Affiliation

Department of Physiology, Faculty of Medicine, Ain Shams University

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Volume

47

Article Issue

2

Related Issue

8376

Issue Date

2018-04-01

Receive Date

2018-04-01

Publish Date

2018-04-01

Page Start

221

Page End

240

Print ISSN

1110-0400

Link

https://amj.journals.ekb.eg/article_54916.html

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https://amj.journals.ekb.eg/service?article_code=54916

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6

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Original Article

Type Code

941

Publication Type

Journal

Publication Title

Al-Azhar Medical Journal

Publication Link

https://amj.journals.ekb.eg/

MainTitle

A POSSIBLE CARDIO-PROTECTIVE ROLE OF EARLY REMOTE ISCHEMIA PRECONDITIONING AGAINST ISCHEMIA REPERFUSION INJURY IN ISOLATED HEARTS OF ADULT ALBINO RATS: POSSIBLE INVOLVEMENT OF HYPOXIA INDUCIBLE FACTOR

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Article

Created At

22 Jan 2023