“The biological activity of DCM, which was slightly higher on an equimolar basis than that of MTX in HA-free culture medium, was reduced to a much lower level than that of MTX in the presence of HA (2.5 g/dl) in the culture medium.”
“Thus, on a basis of the dose causing 90% inhibition, the equitoxic concentration of MTX increased only about 2-fold in the presence of HA , while that of DCM increased about 5-fold.”