RNAs are the direct products of genes, and these small RNAs can bind to other specific messenger RNA (mRNA) molecules and either increase or decrease their activity, for example by preventing an mRNA from producing a protein.
What causes stretch marks? Stretch marks are caused when the skin rapidly stretches as a result of sudden growth or weight gain. The stretching causes the middle layer of skin (dermis) to tear, allowing the deeper skin layers to show through, forming stretch marks. The dermis contains strong, inter-connected fibres that allow your skin to stretch as your body grows.
By definition stretch marks are consistent with a lack of elasticity. This may also be associated with excess skin. This can be associated with weight loss or rapid tissue stretching. If associated with excess skin, then the skin removal may help to plate the stretch marks on stretch and decrease their prominence. January 4th, 2010.