“Both EGF and GGA increased the release … degeneration products, NO2− and NO3−. The [3H]glucosamine uptake was completely inhibited by …-selective NO synthase (NOS) inhibitors, NG-nitro-l-arginine and NG-monomethyl-l-arginine, and it was only partially … a more selective inhibitor for inducible NOS isoform (iNOS), aminoguanidine.”