Welcome to the Big Molecule Watch!

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Goodwin’s award-winning Big Molecule Watch is the best resource for daily updates and analyses of regulatory issues, litigation, legislation, and other news in the world of biologics, biosimilars and related technologies. The editors of this blog have collectively been watching and engaging with the world of biologics and biosimilars (“big molecules”) since before the inception of the biosimilar industry in the U.S.  With extensive experience representing clients at all stages of a biologic’s or biosimilar’s lifecycle, from research and development, to patents, to regulatory application and approval, and through litigation and appeals, we are excited to share our observations and insights as the industry and the law continues to develop in this exciting area.

This blog focuses on “big molecules” as opposed to “small molecules.” Small molecule drugs have low molecular weight, a simple and well-defined structure, and are chemically synthesized. In contrast, “big molecule” drugs have high molecular weight, complex structures, and are derived from living organisms. For example, aspirin is small molecule while a monoclonal antibody is a big molecule. For further reading on big molecules, consider FDA's resources on biologics.

New Patents Listed in the Purple Book for Regeneron’s EYLEA

FDA’s Purple Book provides a searchable database of licensed biological products and includes the patent information provided to biosimilar applicants during the BPCIA patent dance.  As we previously reported, a patent list for Regeneron’s EYLEA (aflibercept) was added to the Purple Book in April 2022.  That original list contained 29 patents, including…

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FDA Approves the Cyltezo Pen, an Autoinjector Option for Adalimumab

On May 22, 2023, Boehringer Ingelheim announced that the FDA has approved the Cyltezo Pen, a new autoinjector option for Cyltezo (adalimumab-adbm). According to a previous announcement from Boehringer Ingelheim, Cyltezo is an FDA-approved Interchangeable biosimilar to Humira (adalimumab) and its commercial license will begin on July 1, 2023. Initially…

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Janssen and Amgen Settle STELARA (Ustekinumab) BPCIA Litigation

We previously reported on Janssen’s complaint alleging that Amgen’s filing of an aBLA for ustekinumab, a biosimilar of STELARA, infringes Janssen patents, and about Janssen seeking a preliminary injunction to block Amgen from the commercial manufacturing, sale, and offer for sale of its ustekinumab product.  Briefing for the PI motion was…

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Amneal Launches FYLNETRA (pegfilgrastim-pbbk) in the United States

Last week, Amneal announced the launch of FYLNETRA (pegfilgrastim-pbbk), a biosimilar to Amgen’s NEULASTA, in the United States.  According to the press release, FYLNETRA—Amneal’s third biosimilar launch in the United States since late last year—is used to treat neutropenia (low neutrophils, a type of white blood cell that fights infection)…

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Biosimilar Clinical Trial Updates

On May 4, 2023, Alvotech announced the initiation of a confirmatory patient study for AVT05, a biosimilar candidate to Simponi and Simponi Aria (golimumab).  The clinical study will compare the efficacy, safety, and immunogenicity of AVT05 and Simponi in adult patients with moderate to severe rheumatoid arthritis.  Per the announcement,…

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Proposed USPTO Fee Changes Could Impact PGR and IPR Filing Strategies Used by Biosimilars

The USPTO has proposed several fee changes for implementation in 2025. If implemented, these changes will increase filing fees for Inter Partes Reviews (IPRs) and Post Grant Reviews (PGRs) by 25% “to improve cost recovery.” Additionally, the PTO is proposing to allow IPR and PGR petitions to exceed the current…

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Biogen Seeks Preliminary Injunction in Natilizumab BPCIA Litigation – Hearing Scheduled for May 17

In October 2022, we reported that Biogen was seeking a preliminary injunction in its BPCIA case brought in the District of Delaware against Sandoz relating to Sandoz’s proposed multiple sclerosis biosimilar of TYSABRI (natalizumab). The parties completed their briefing on Biogen’s motion in April, and Judge Williams has scheduled a…

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Samsung Files IPR Petition on Regeneron's Aflibercept Patent

Last week, Samsung Bioepis filed an IPR petition challenging claims of U.S. Patent No. 11,253,572 (“the ’572 patent”), owned by Regeneron Pharmaceuticals.  According to the petition, the claims are directed to the use of aflibercept to treat angiogenic eye disorders, including diabetic macular edema and age-related macular degeneration. As we…

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Bristol-Myers Squibb Files Patent Infringement Complaint Against AstraZeneca Regarding Anti-PD-L1 Antibody Product

On April 25, 2023, Bristol-Myers Squibb (“BMS”) filed a complaint in the District of Delaware against AstraZeneca related to AstraZeneca’s anti-PD-L1 antibody product, IMFINZI (durvalumab), alleging willful infringement of U.S. Patent No. 9,402,899 (“the ’899 patent”).  BMS alleges that the ’899 patent covers “Nobel Prize winning methods of treating cancer”…

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