No­var­tis suf­fers a loss in its fight to block Re­genxbio's Zol­gens­ma patent ex­ten­sion

No­var­tis came up short on Wednes­day in its bid to block its tiny biotech part­ner Re­genxbio from get­ting a patent term ex­ten­sion (PTE) on Zol­gens­ma.

The Swiss phar­ma gi­ant us­es Re­genxbio’s AAV9 vec­tor for its block­buster spinal mus­cu­lar at­ro­phy drug, which brought in more than $1.3 bil­lion last year alone. But the com­pa­ny’s gene ther­a­pies unit told the FDA in Au­gust that Re­genxbio shouldn’t have filed for a PTE last April be­cause that ap­pli­ca­tion should have come from No­var­tis.

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