RNA modification is important factor in smooth muscle contraction
RNA modification defects can lead to high blood pressure
Genetic information is stored in DNA and is passed on in a very stable manner from one cell to the next or from one generation to the next. On a cellular level, genetic information is transcribed from DNA into RNA (ribonucleic acid) and then mostly "translated" into proteins, which carry out cellular functions. This normally involves modifying the RNA so that this information can be “read" correctly or used appropriately – in order to adapt to changes in prevailing conditions. Researchers from the Division of Cell and Developmental Biology at MedUni Vienna have now shown that defects in this RNA modification can result in altered smooth muscle contraction, cardiovascular diseases and high blood pressure.
The main finding of the study by lead author Mamta Jain supervised by Franz-Michael Jantsch of MedUni Vienna's Division of Cell and Developmental Biology is: if a particular RNA modification in smooth muscle is defective or inadequate in the mouse model, there is a greater likelihood of high blood pressure and cardiovascular problems developing as a result of over-contraction. Working with MedUni Vienna's Division of Anatomy, this finding was further corroborated by post-mortem tests on bodies donated to science: defective RNA modification in the aortic muscles was observed in those who had died with a hypertrophic, or enlarged, heart: This vital modification was around 50% lower than in most people. Normally, RNA modification of 90% can be read in the proteins but, in the affected individuals, it was below 40%.