This year, it has been joined by natalizumab (Tysabri; Elan/Biogen-Idec), a humanized antibody against α4 integrin, and most recently, the PEGylated humanized anti-TNF-α antibody fragment ...

Until recently, ASN was available in three formulations: native Escherichia coli, PEGylated E. coli (PEG), and Erwinase, with native E. coli typically more accessible in low- and middle-income ...