Synthetic mRNA can induce self-repair and regeneration of the infarcted heart

Synthetic mRNA can induce self-repair and regeneration of the infarcted heart

Sep. 8, 2013 — A team of scientists at Karolinska Institutet and Harvard University has taken a major step towards treatment for heart attack, by instructing the injured heart in mice to heal by expressing a factor that triggers cardiovascular regeneration driven by native heart stem cells. The study, published in Nature Biotechnology, also shows that there was an effect on driving the formation of a small number of new cardiac muscle cells.

---

Share This:

"This is the beginning of using the heart as a factory to produce growth factors for specific families of cardiovascular stem cells, and suggests that it may be possible to generate new heart parts without delivering any new cells to the heart itself ," says Kenneth Chien, a Professor at the medical university Karolinska Institutet in Sweden and Harvard University, USA, who led the research team behind the new findings.

The study is based upon another recent discovery in the Chien lab, which was published in Cell Research. This study shows that VEGFA, a known growth factor for vascular endothelial cells in the adult heart, can also serve as a switch that converts heart stem cells away from becoming cardiac muscle and towards the formation of the coronary vessels in the fetal heart. To coax the heart to make the VEGFA, the investigators in the Nature Biotechnology study used new technology where synthetic messenger RNA (mRNA) that encodes VEGFA is injected into the muscle cell. Then, heart muscle produces a short pulse of VEGFA. The mRNA is synthetically modified so that it escapes the normal defense system of the body that is known to reject and degrade the non-modified mRNA as a viral invader.

The study, performed in mice, shows that only a single administration of a short pulse of expression of VEGFA is required, if it can be delivered to the exact region where the heart progenitors reside. The therapeutic effect is long term, as shown by markedly improved survival following myocardial infarction with a single administration of the synthetic mRNA when given within 48 hours after the heart attack. The long-term effect appears to be based on changing the fate of the native heart stem cells from contributing to cardiac fibrotic scar tissue and towards cardiovascular tissue.

"This moves us very close to clinical studies to regenerate cardiovascular tissue with a single chemical agent without the need for injecting any additional cells into the heart." says Professor Chien.

At the same time, he points out that these are still early days and there remains much to be done. In particular, it will become of interest to engineer new device technology to deliver the synthetic mRNA via conventional catheter technology. It also will be critical to move these studies, which are based in mouse models, to other animals, which is currently in progress.

The platform technology is being developed for clinical use by the company Moderna Therapeutics, which was co-founded by Kenneth Chien. A recently announced collaboration with AstraZeneca will support moving the synthetic modified mRNA therapeutics for regenerative cardiology into the clinical setting. This work was also funded with grants from the US National Institutes of Health and The Croucher Foundation, amongst others.

Welcome to SUV System Ltd!

SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.

We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.

SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com

Electronic Components distributor:http://www.suvsystem.com

Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html

IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html

LED Distributor:http://www.suvsystem.com/l/LED-1.html

Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html

Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html

Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html

Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html

SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc

we are focus on the following fields,and hope we can help you.

Resistors Diodes Inc AVX Resistors Kingbrigt LED Military IC Atmel IC INFLNEON Diodes IR transistor Connectors Electronic News Resistor Networks Chip Fuses About US TOSHIBA Diodes Microchip IC ST Transistors Dialight LED LED part Digital Transistors Industrial IC FAIRCHILD diodes Voltage Regulators Transistors Vishay resistors High Precision Resistors MAXIM IC Chip Inductors Capacitor Fairchild Semiconductor Transistors TDK IC LED ON Diodes Diodes Ligitek LED Infineon Technologies Transistors IR Diodes Cypress IC LITTELFUSE Diodes DIODES Transistors NXP Diodes ELPIDA IC
http://www.suvsystem.com/a/5665.aspx