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Cyclocreatine Phosphate: A Novel Bioenergetic/Anti-Inflammatory Drug That Resuscitates Poorly Functioning Hearts and
Salwa A Elgebaly1,2, Charles Van Buren3, Robert Todd4
1Research & Development, Nour Heart, Inc., Vienna, VA 22180, USA.
Insights
Cyclocreatine phosphate (CCrP) shows promise in preventing and treating heart failure (HF) caused by myocardial injury. This bioenergetic compound preserves cardiac function and reduces inflammation in rat models, suggesting potential clinical applications.
Area of Science:
- Cardiology
- Biochemistry
- Pharmacology
Background:
- Myocardial injury leads to adenosine triphosphate (ATP) depletion, contributing to heart failure (HF).
- Cyclocreatine phosphate (CCrP) has demonstrated the ability to preserve myocardial ATP during ischemia and maintain cardiac function in animal models.
Purpose of the Study:
- To evaluate the prophylactic and therapeutic efficacy of CCrP in preventing HF secondary to ischemic injury using an isoproterenol (ISO)-induced rat model.
Main Methods:
- Thirty-nine rats were divided into control and ISO groups, with CCrP administered prophylactically or therapeutically.
- Measurements included cardiac enzymes, ECG, cardiac remodeling markers, ejection fraction (EF%), and physical activity.
Main Results:
- CCrP administration, both prophylactic and therapeutic, protected against ISO-induced cardiac injury, evidenced by reduced CK-MB elevation and ECG/ST changes.
- Prophylactic CCrP decreased heart weight, hs-TnI, TNF-α, TGF-β, and caspase-3, while increasing EF%, eNOS, and connexin-43.
- Therapeutic CCrP normalized EF%, physical activity, and serum levels of hs-TnI and BNP, with reduced cardiac remodeling.
Conclusions:
- CCrP acts as a bioenergetic and anti-inflammatory agent, showing significant promise as a safe therapeutic option for myocardial ischemic sequelae and HF.
- CCrP's ability to salvage poorly functioning hearts supports its potential for clinical application.
Abstract:
Irreversible myocardial injury causes the exhaustion of cellular adenosine triphosphate (ATP) contributing to heart failure (HF). Cyclocreatine phosphate (CCrP) was shown to preserve myocardial ATP during ischemia and maintain cardiac function in various animal models of ischemia/reperfusion. We tested whether CCrP administered prophylactically/therapeutically prevents HF secondary to ischemic injury in an isoproterenol (ISO) rat model. Thirty-nine rats were allocated into five groups: control/saline, control/CCrP, ISO/saline (85 and 170 mg/kg/day s.c. for 2 consecutive days), and ISO/CCrP (0.8 g/kg/day i.p.) either administrated 24 h or 1 h before ISO administration (prophylactic regimen) or 1 h after the last ISO injection (therapeutic regimen) and then daily for 2 weeks. CCrP protected against ISO-induced CK-MB elevation and ECG/ST changes when administered prophylactically or therapeutically. CCrP administered prophylactically decreased heart weight, hs-TnI, TNF-α, TGF-β, and caspase-3, as well as increased EF%, eNOS, and connexin-43, and maintained physical activity. Histology indicated a marked decrease in cardiac remodeling (fibrin and collagen deposition) in the ISO/CCrP rats. Similarly, therapeutically administered CCrP showed normal EF% and physical activity, as well as normal serum levels of hs-TnI and BNP. In conclusion, the bioenergetic/anti-inflammatory CCrP is a promising safe drug against myocardial ischemic sequelae, including HF, promoting its clinical application to salvage poorly functioning hearts.
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