Abstract: Disclosed herein are compositions and methods for treatment and prevention of low back pain. The compositions include vectors comprising nucleotide sequences encoding one or more CRISPR-Cas system guide RNAs and a RNA-directed nuclease. The methods include modulating expression of one or more genes in a cell using said compositions, introducing a CRISPR-Cas system into a cell comprising one or more vectors comprising said compositions, including site-specific DNA cleavage in a cell, and treating a subject having lower back pain, and lower back pain cause by degenerative disc disease using the compositions disclosed herein.

Abstract: In the construction of a structural block wall the method includes the steps of erecting on a base a wall of mortarless structural blocks, applying to opposite faces of the wall a fibre reinforced polymeric coating and anchoring the wall to the base with the fibre reinforced coating. The resultant wall possesses a structural integrity wherein compressive loads are borne by the structure blocks and tensile loads are borne by the fibre reinforced skin extending over the surface of the wall and onto the base to anchor the wall to the base.