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Published on: November 8, 2015
Sirolimus and its analogs and its effects on vascular diseases
1Vascular Strategies LLC 100 Lancaster Ave Wynnewood, PA 19096, USA. sadelman@vascularstrategy.com
Abstract:
Sirolimus (rapamycin), a macrolide antibiotic approved for use as an immunosuppressive agent in the prevention of organ rejection, is a cell proliferation inhibitor and regulator of the immune response which acts through inhibition of TOR (target of rapamycin), a kinase essential to cell cycle progression. Recent studies suggest that the TOR pathway is critical to overall cell function, and at a basic mechanistic level, may be a regulator and potential therapeutic target involved in many of the major (and minor) disorders seen in man today. Cardiovascular diseases including restenosis following percutaneous coronary intervention as well as the more widespread condition of atherosclerosis, share this common involvement of TOR. The present report addresses the current state of intervention in cardiovascular disorders with Sirolimus and similar inhibitors of TOR, including the rationale for this approach and the successes observed to date. Success of the first drug-eluting stent to locally treat restenosis in the clinic is discussed, as are preclinical studies addressing a role in overall atherosclerosis in animal models. In addition, due to the known toxicities when given systemically, an approach for targeted delivery to local areas of vascular disease is discussed.
Insights
Sirolimus (rapamycin) inhibits the target of rapamycin (TOR) pathway, crucial for cell function. This review explores its use in cardiovascular diseases like restenosis and atherosclerosis, including drug-eluting stents and targeted delivery.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
- Molecular Biology
Background:
- The target of rapamycin (TOR) pathway is fundamental to cell proliferation and immune response.
- TOR signaling is implicated in various human disorders, including cardiovascular diseases such as atherosclerosis and restenosis.
- Sirolimus (rapamycin) is an FDA-approved immunosuppressant that inhibits TOR.
Purpose of the Study:
- To review the current therapeutic applications of Sirolimus and TOR inhibitors in cardiovascular disorders.
- To discuss the rationale, successes, and future directions for using TOR inhibition in managing cardiovascular diseases.
- To explore strategies for targeted delivery of TOR inhibitors to mitigate systemic toxicities.
Main Methods:
- Review of existing literature on Sirolimus, TOR pathway, and cardiovascular diseases.
- Analysis of clinical data from drug-eluting stents for restenosis treatment.
- Examination of preclinical studies investigating TOR inhibition in atherosclerosis models.
Main Results:
- Sirolimus-eluting stents have demonstrated success in locally treating restenosis post-percutaneous coronary intervention.
- Preclinical studies suggest a role for TOR inhibition in managing atherosclerosis.
- Targeted delivery approaches are being developed to improve safety and efficacy.
Conclusions:
- TOR inhibition represents a promising therapeutic strategy for cardiovascular diseases.
- Local delivery of Sirolimus via drug-eluting stents is effective for restenosis.
- Further research into targeted delivery systems is warranted for broader cardiovascular applications.
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