Protective Role of NAD+ Against MI-induced HF in Sprague-Dawley Rats and Beagles
01 Jan

Protective Role of NAD+ Against MI-induced HF in Sprague-Dawley Rats and Beagles

 


1. Introduction

Disrupted nicotinamide adenine dinucleotide (NAD+) metabolism is increasingly deemed to be one of risk factor for amendable cardiovascular disorders. A substantial evidence has mirrored that restoring NAD+ stock and energy metabolism may be effective in alleviating the symptoms of patients with heart failure (HF), one of the typical cardiovascular disease after myocardial infarction (MI).

2. About HF

HF has dominant clinical features of ventricular filling or ejection impairment, concomitant with abnormalities in cardiac structure/function. This disorder afflicts about 38 million patients across the world, and the number of HF patients is on the rise with the age, posing a great threat to the life of patients and bringing huge economic burden on the patient family and society.

In terms of drug therapies of HF, the "golden triangle" of beta blockers, ACEI/ARB, and aldosterone receptor antagonists has long been the preferred option. Despite significant improvement on the survival of patients, the 5-year mortality rate remains at 50%. Hence, it is of great significance to seek novel way with high efficacy and safety. NAD supplements may be an effective choice for alleviating HF.

3. Research protocol

For further verification of the efficacy of NAD+, MI-induced HF models are constructed in male Sprague-Dawley rats and beagles herein. Subsequently, the left anterior descending arteries of MI-induced HF animals are ligated for 1 week, followed by 4-week treatment with or without low/medium/high dose of NAD+ and the positive control drug LCZ696, an angiotensin receptor blocker-neprilysin inhibitor with an cardioprotective effect after MI.

Schematic diagram of the operation steps for Beagles.

4. The efficacy of NAD on rats and beagles with MI-induced HF

NAD+ shows the equivalent efficacy as LCZ696 in the treatment of MI-induced HF, or even better than LCZ696 at the medium and high doses. In rat/beagle HF models, the heart mass index, heart function, and myocardial fibrosis in the infarct marginal zone are dose-dependently improved post administration of NAD or LCZ696, as manifested by decreased end-systolic volume, end-systolic dimension, creatine kinase and lactic dehydrogenase, as well as the increased ejection fractions, fractional shortening, cardiac output, and stroke volume. In addition, the downregulation of left ventricular blood pressure in the HF model animals is ameliorated post administration of NAD or LCZ696.

NAD+ ameliorates HF-induced cardiac dysfunction in SD rats


Hemodynamic parameters of the different groups after treatment

5. Conclusion

In rat and beagle MI-induced HF models, NAD+ conspicuously alleviates myocardial hypertrophy and cardiac function, represses myocardial fibrosis, and reduces the myocardial infarction, laying a theoretical foundation for the clinical application of energy metabolism therapy with NAD+.

Effects of NAD+ on cardiac fibrosis in peri-infarction in SD rats

Reference

Pei Z, Yang C, Guo Y, Dong M, Wang F. The Role of NAD+ in Myocardial Ischemia-induced Heart Failure in Sprague-Dawley Rats and Beagles. Curr Pharm Biotechnol. Published online February 13, 2024. doi:10.2174/0113892010275059240103054554

BONTAC NAD

BONTAC has been dedicated to the R&D, manufacture and sale of raw materials for coenzyme and natural products since 2012, with self-owned factories, over 170 global patents as well as strong R&D team consisting of Doctors and Masters. BONTAC has rich R&D experience and advanced technology in the biosynthesis of NAD and its precursors (eg. NMN and NR), with various forms to be selected (eg. endoxin-free IVD-grade NAD, Na-free or Na-containing NAD; NR-CL or NR-Malate). High quality and stable supply of products can be better ensured here with the exclusive Bonpure seven-step purification technology and Bonzyme Whole-enzymatic method.

Disclaimer

This article is based on the reference in the academic journal. The relevant information is provided for sharing and learning purposes only, and does not represent any medical advice purposes. If there is any infringement, please contact the author for deletion. The views expressed in this article do not represent the position of BONTAC.
 
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