Amgen filed patent infringement claims against Mylan over Mylan’s proposed Neulasta biosimilar. The suit is the latest in a number of litigations over the blockbuster drug.
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Biologics Blog is a source of insights, information and analysis related to biologics, including the legal developments, trends and changing regulation that impact the biotechnology industry. Patterson Belknap represents biotechnology, pharmaceutical and healthcare companies in a broad range of patent litigation matters, including patent infringement cases, PTO trial proceedings, patent licensing and other contractual disputes. Our team includes highly experienced trial attorneys with extensive technical knowledge, many of whom have advanced scientific degrees and industry experience in fields such as molecular biology, biochemistry, chemistry, statistics and nuclear engineering.
Following Biosimilar Trial, Jury Awards Amgen $70 Million for Pfizer’s Pre-Approval Infringement of Now-Expired EPO Patent
In one of the first Biologics Price Competition and Innovation Act (BPCIA) litigations to reach trial, a jury on Friday awarded Amgen $70 million in damages for Pfizer’s infringement of one of Amgen’s expired patents protecting Epogen®. The jury found that Pfizer’s subsidiary Hospira, in manufacturing its proposed biosimilar ahead of FDA approval, was not protected by the statutory safe harbor, 35 U.S.C. § 271(e)(1). This action provides an important lesson in the potential value of expired or soon-to-expire patents in BPCIA litigation. Because a biosimilar maker’s pre-approval activity may not be covered by the statutory safe harbor, patents that are expired at the time of approval may still have been infringed.
On August 10, 2017, the Federal Circuit issued its decision in Amgen v. Hospira. It dismissed Amgen’s interlocutory appeal from a discovery order on jurisdictional grounds and denied a writ of mandamus ordering the district court to compel manufacturing discovery for patents that Amgen did not assert against Hospira’s biosimilar of Epogen. In denying Amgen’s request for mandamus, the Federal Circuit explained that Amgen did not establish an indisputable right to Hospira’s manufacturing information and therefore did not meet the requirement for mandamus. The decision has important implications for innovator companies that do not receive needed information under the Biologics Price Competition and Innovation Act of 2009 (BPCIA): innovators need to sue blind or risk not obtaining discovery for unasserted patents. The Federal Circuit also confirmed that Rule 11 is satisfied in such blind lawsuits due to an applicant’s withholding of information.
On August 2, AbbVie sued Boehringer in the District of Delaware, alleging infringement of multiple patents related to AbbVie’s blockbuster biologic Humira (adalimumab). Though AbbVie has “more than 100 issued United States patents” that protect Humira and says that Boehringer infringes 74 of them, AbbVie explains that it was only able to assert 8 of the patents against Boehringer in its complaint. As AbbVie explains, Boehringer was able to limit the scope of litigation to 8 patents by complying with the procedures of the Biologics Price Competition and Innovation Act of 2009 (“BPCIA”).
Many biosimilar makers have tried and failed to obtain approval for biosimilar versions of Amgen’s Neulasta (pegfilgrastim), a long-acting version of Amgen’s Neupogen (filgrastim). Coherus BioSciences, Inc. is the latest biosimilar maker to encounter such hurdles. FDA denied Coherus’s biosimilar application in June, pushing any approval of the proposed biosimilar back by at least a year. Coherus was forced to lay off a third of its workforce after FDA’s rejection of the application. On Tuesday, it asked a federal court to stay the BPCIA litigation recently brought against it by Amgen. Coherus seeks to stay discovery until resolution of its pending motion to dismiss to allow it to conserve resources while preparing to resubmit its biosimilar application.
On Thursday, July 13, 2017, FDA’s Oncological Drugs Advisory Committee (ODAC) unanimously recommended approval of biosimilars of two blockbuster cancer drugs. The first, Amgen and Allergan’s ABP-215, is a proposed biosimilar of Roche/Genentech’s Avastin (bevacizumab), a monoclonal antibody used in the treatment of a number of different cancers. The second, Mylan and Biocon’s MYL-1401O, is a proposed biosimilar of Roche/Genentech’s monoclonal antibody Herceptin (trastuzumab), a drug used in the treatment of HER2+ breast and gastric cancer. If, as expected, the drugs receive final FDA approval, each of these drugs will be the first U.S. biosimilar for its respective reference product.
Pfizer’s proposed biosimilar of Amgen’s Epogen® and Johnson & Johnson’s Procrit® (epoetin alfa) is poised to be the first erythropoietin (EPO) biosimilar in the U.S. FDA staff recommended approval of Pfizer’s product as a biosimilar for the four indications of Epogen/Procrit. On May 25, 2017, FDA’s advisory committee agreed with that assessment, but FDA did not approve Pfizer’s product following the meeting. Instead, in a first for biosimilar products, FDA issued a complete response letter in June rejecting Pfizer’s EPO biosimilar application for a second time. Pfizer revealed that FDA did not approve the application after the advisory committee meeting due to FDA’s concerns with a manufacturing site for the EPO biosimilar. Pfizer’s product may not be approved, much less launched, this year due to outstanding manufacturing issues.
On Monday, the U.S. Supreme Court issued its first interpretation of the biosimilars statute, the Biologics Price Competition and Innovation Act of 2009. The BPCIA, part of Obamacare, introduced an abbreviated pathway for regulatory approval of biosimilars, allowing biosimilars to piggyback on the regulatory data of innovator biologics for their approval.
This post, Part III, of a three-part series (Part I and Part II) on FDA’s interchangeability draft guidance highlights a number of open issues that stakeholders have identified in their comments to FDA. These include the naming and labeling for interchangeable products as well as the relationship between multiple interchangeable products for the same reference product. Biosimilar makers also wanted FDA to make clear that physician-mediated switching is possible for non-interchangeable biosimilar products even if pharmacy-level substitution is not. A number of patient groups, by contrast, expressed concern that payers were in effect mandating pharmacy-level substitution for non-interchangeable biosimilars by taking innovator products off formularies.
This post, Part II, of a three-part series (Part I) on FDA’s interchangeability draft guidance, highlights the key issues that were raised in the stakeholder comments provided to FDA. FDA received 52 comments in total from a variety of stakeholders, including patients, physicians, insurers, innovators and biosimilar makers. The stakeholders were divided in their views in a number of areas. Patient and physician groups and innovators urged FDA to adopt more stringent requirements for interchangeability assessments. Biosimilar makers and insurers, by contrast, generally pressed for a loosening of the guidance provided by FDA as well as clarification that interchangeable biosimilar products were not more similar to the innovator product than the non-interchangeable ones. The comments also raised a number of issues not addressed by the guidance, which will be discussed in the third post in this series.
The comment period for FDA’s draft guidance Considerations in Demonstrating Interchangeability With a Reference Product closed on Friday, May 19, 2017. Innovators, biosimilar makers, patients, healthcare providers and other stakeholders have weighed in on the long-awaited guidance. Interchangeable biosimilars, unlike other biosimilars, may be substituted for the innovator product without the intervention of the healthcare provider who prescribed the innovator product. FDA’s guidance for interchangeable biosimilars is thus particularly important to stakeholders. This post, Part I of a three-part series, provides an overview of the key provisions of the guidance. Parts II and III will focus on the comments from stakeholders and open issues.
Approvals of biosimilar products in Europe continue to outpace those in the United States. 28 biosimilars are currently approved in Europe and five in the U.S. In 2017, the European Medical Agency has approved six biosimilar applications, including applications for biosimilars to two of the best-selling complex biologics, Humira (adalimumab) and MabThera (rituximab). EMA is likely to approve seven more biosimilar applications in the coming months. The Food and Drug Administration in turn has approved one biosimilar this year, and has scheduled an advisory committee meeting for later this month for Pfizer’s proposed biosimilar of Amgen’s EPO (epoetin alfa), which the agency previously rejected. Proposed biosimilars of complex biologics in a number of new classes are pending before both agencies at the same time.
When a small pharmaceutical company discovers a new medicine, it’s not uncommon for the company – which may not itself have the resources or infrastructure to get that medicine to patients – to seek a distribution partner early in development. If the partners make a deal – say the distributor pays for the right to sell the drug (if it gets approved) – and the partners publicize the existence of the deal (but not the full details of the medicine), does the deal bar a patent filed more than one year later? In Helsinn Healthcare S.A v. Teva Pharms. USA, Inc. (May 1, 2017), a unanimous panel of the Federal Circuit ruled that the on-sale bar of the America Invents Act (AIA) precludes such a patent, just as the pre-AIA on-sale bar would. But, in a decision with the potential to chill deals between small bio/pharma companies and potential commercialization partners, the court left unresolved some important questions about the meaning of the AIA’s on-sale bar.
President Donald J. Trump has now been in office for just over one hundred days. Observers have been quick to mark this milestone and assess the new administration’s performance, especially on headline-grabbing issues like immigration and foreign policy. Amidst the hubbub, however, few have commented on how President Trump’s opening moves could affect the multi-billion-dollar biologics industry. President Trump’s actions during his first hundred days on issues like trade, judges, and healthcare have the potential to shape the biologics industry for innovators and biosimilar makers alike for years to come.
In Life Technologies Corp. v. Promega, the Supreme Court reversed the Federal Circuit’s interpretation of 35 U.S.C. § 271(f)(1), and held that a single component does not constitute a “substantial portion of the components of a patented invention” under the statute. The Court, however, declined to address how many components are needed to trigger liability.
A number of biosimilar makers have tried to obtain approval for proposed biosimilar versions of Amgen’s Neulasta (pegfilgrastim), a long-acting version of Amgen’s Neupogen (filgrastim), but have encountered hurdles so far both in the U.S. and Europe.
Despite nearly universal opposition from both biosimilar makers and innovator companies, FDA has issued final guidance adopting its controversial August 2015 proposal for naming biologics. Under the guidance adopted by FDA, the nonproprietary name of a biologic will consist of the core nonproprietary name of the originator product plus a meaningless but distinguishable suffix of four lowercase letters unique to each product.
Europe’s biosimilar market continues to develop, with biosimilars in new classes approved and pending in applications before the European Medicines Agency (EMA). The EMA has approved four additional biosimilars in 2016, including three biosimilars in two new classes: a biosimilar of Amgen’s Enbrel (etanercept) and two biosimilars of Sanofi’s Clexane (enoxaparin sodium). In addition to the now 22 approved biosimilars, 16 additional biosimilar applications are under evaluation by the EMA with 12 of the 16 falling in four new product classes: biosimilars of Amgen’s Neulasta (pegfilgrastim), Genentech’s Herceptin (trastuzumab), Roche’s MabThera (rituximab) and AbbVie’s Humira (adalimumab). While Europe’s biosimilar pathway offers important lessons for the U.S., the Food and Drug Administration (FDA) is setting its own path. Two of the four biosimilars approved in the U.S., Sandoz’s biosimilar of Amgen’s Enbrel and Amgen’s biosimilar of AbbVie’s Humira, were approved in the U.S. without any prior approval in Europe. The FDA has also rejected applications for proposed biosimilars with authorization and marketing experience in Europe, making clear that approval in Europe will not necessarily result in approval in the U.S.
The America Invents Act established inter partes review proceedings within the U.S. Patent and Trademark Office for certain challenges to the validity of issued patents. More than 5,000 IPR petitions have been filed to date, and more often than not the PTO institutes review of the challenged claims. In over 80 percent of IPRs that have reached a final decision, the PTO has invalidated some or all of the instituted claims. IPR proceedings have impacted patents across technologies, including pharmaceutical and biotech patents.
This week’s election of Donald Trump as the next President of the United States undoubtedly impacts many sectors of the American economy, and the bio/pharmaceutical industry is no exception. Two of Trump’s stated policies might bear directly on how biologics will be protected and litigated in this country and abroad: the repeal of the Affordable Care Act of 2010 (ACA), also known as Obamacare, and the repudiation of the Trans-Pacific Partnership (TPP).
FDA Says BPCIA Poses No Fifth Amendment Taking for Innovator Biologics Submitted Prior to Its Enactment
On the same day that FDA approved the first biosimilar of Humira, the fourth biosimilar to be approved in the U.S., it also denied a citizen petition filed by Abbott Laboratories (now AbbVie) requesting that FDA not accept any filing or approve any application for a biosimilar version of Humira® (adalimubab), AbbVie’s best-selling biologic, or any other product for which a biologics license application (BLA) was submitted to FDA prior to March 23, 2010, the date on which the Biologics Price Competition and Innovation Act (BPCIA) was signed into law. AbbVie argued that to accept or approve any such biosimilar filing would constitute an unconstitutional taking under the Fifth Amendment. AbbVie filed its petition in April 2012, long before any biosimilar was approved in the U.S. and before Amgen filed its biosimilar application for Humira with FDA. All four of the U.S. biosimilars approved to date have relied on BLAs submitted to FDA prior to March 23, 2010.
The FDA on Friday approved the first U.S. biosimilar of Humira (adalimumab), AbbVie’s best-selling biologic for treatment of inflammatory conditions. The biosimilar, Amgen’s Amjevita (adalimumab-atto), received approval for all of the indications requested by Amgen: in adults, moderately to severely active rheumatoid arthritis, active psoriatic arthritis, active ankylosing spondylitis, moderately to severely active Crohn’s disease, moderately to severely active ulcerative colitis, and moderate to severe plaque psoriasis, and in patients four years of age and older, moderately to severely active polyarticular juvenile idiopathic arthritis. Amjevita is the fourth FDA-approved biosimilar in the U.S. As noted by the FDA, Amjevita has been approved as a biosimilar of Humira, not an interchangeable product. Amgen also submitted its Humira biosimilar for review by the European Medicines Agency in December 2015, but the EMA has yet to issue a decision.
It has been four years since the first inter partes review proceedings were filed in the United States. The first IPR petition, filed on September 16, 2012 (the first day IPRs became available), made it all the way to the Supreme Court, and the number of IPRs has greatly exceeded expectations, making the Patent Trial and Appeal Board one of the most important and busiest forums for patent validity litigation in the US. IPRs were intended to help high-tech innovators besieged with suits from patent trolls to efficiently and cheaply invalidate dubious patents and focus on innovation. But the impact of these proceedings goes far beyond electrical and computer fields as they have had a major impact on biotech and pharmaceutical patents as well. The PTAB proceedings for U.S. Patent No. 6,331,415 (better known as the “Cabilly II patent”) – one of the most litigated biotech patents in the US – offer key insights into IPRs and why they are widely used across technologies.
Amgen’s Federal Circuit Appeal: the Importance of Manufacturing Information to Biosimilar Litigation
Amgen has filed its appeal brief in Amgen v. Hospira, following the Federal Circuit’s denial of Hospira’s motion to dismiss the appeal for lack of jurisdiction. The appeal presents an important question for biosimilar litigation: where biosimilar applicants fail to provide manufacturing information in the pre-litigation information exchanges of the Biologics Price Competition and Innovation Act (BPCIA), are they required to provide that information in litigation even if it is irrelevant to the asserted patents? The question is particularly important because if the answer is no as the district court held, then innovator companies will be forced to assert manufacturing patents that they do not know to be infringed in order to be able to obtain discovery to evaluate their infringement. Amgen also addresses whether the Federal Circuit has jurisdiction to hear the appeal under either the collateral order doctrine or the All Writs Act.
In UCB, Inc. v. Yeda Research and Development Co., the Federal Circuit affirmed the determination by the District Court for the Eastern District of Virginia that UCB, Inc.’s Cimzia® (certolizumab pegol), a humanized antibody fragment that treats inflammatory conditions such as rheumatoid arthritis and Crohn’s disease, does not infringe a monoclonal antibody patent owned by Yeda Research and Development Co., Ltd.. (Fed. Cir. No. 2015-1957, September 8, 2016). Based on actions taken during prosecution, the Federal Circuit agreed that Yeda was “estopped from including chimeric and humanized antibodies within the scope of the monoclonal antibodies claimed” in its patent.
The Federal Circuit has now issued two decisions interpreting the Biologics Price Competition and Innovation Act of 2009 (BPCIA). In Amgen v. Sandoz, the first decision to interpret the BPCIA, the majority held that biosimilar makers could opt out of the first step of the BPCIA’s pre-litigation disclosures, the provision requiring biosimilar makers to provide the innovator company with their abbreviated Biologics License Application (aBLA) and other manufacturing information describing the processes used to make the proposed biosimilar. The court held that the innovator company could sue under the BPCIA in such circumstances and obtain the needed information in discovery. In its second decision, Amgen v. Apotex, the court further buttressed its reasoning as to why the first step of the BPCIA’s pre-litigation provisions was optional. Amgen now appeals a discovery ruling in its biosimilar litigation with Hospira holding that Amgen v. Sandoz does not require Hospira to produce manufacturing information for its proposed biosimilar of Amgen’s Epogen (epoetin alfa). Hospira moved to dismiss the appeal as premature. The Federal Circuit denied the motion and is allowing the appeal to proceed on the merits while at the same time requiring the parties to further address jurisdictional issues.
Six years after the biosimilar pathway was enacted into law, FDA has approved three biosimilars for marketing in the US. Sandoz’s Zarxio, a biosimilar of Amgen’s Neupogen, was the first biosimilar to be approved. Zarxio, a relatively simple biologic, was approved in March 2015 under the Biologics Price Competition and Innovation Act of 2009 (BPCIA). This year, FDA approved two complex biologics, Celltrion and Pfizer’s Inflectra, a biosimilar of Janssen’s Remicade, and Sandoz’s Erelzi, a biosimilar of Amgen’s Enbrel. FDA staff and its arthritis advisory committee also recommended approval of Amgen’s proposed biosimilar of AbbVie’s Humira. On the other hand, Sandoz revealed in July that its biosimilar application for Amgen’s Neulasta, a long-acting version of Neupogen, had been rejected by FDA and Hospira did the same last year for its biosimilar application for Amgen’s EPO. Although the approvals (and rejections) provide significant insights as to FDA’s requirements, there are no simple lessons to be drawn.
On August 30 FDA approved Sandoz Inc.’s biosimilar of Enbrel (etanercept), Amgen Inc.’s blockbuster biologic for treatment of moderate to severe rheumatoid arthritis and a number of other autoimmune conditions. The biosimilar, Erelzi (etanercept-szzs), is the third biosimilar approved for marketing in the US under the Biologics Price Competition and Innovation Act of 2009 (BPCIA). Erelzi has been approved for all of Enbrel’s indications and is the first U.S. biosimilar of etanercept.
In July, the Federal Circuit decided Amgen v. Apotex, No. 2016-1308 (Fed, Cir. July 5, 2016), its second decision interpreting the U.S. biosimilar statute, the Biologics Price Competition and Innovation of Act of 2009 (BPCIA). The Federal Circuit affirmed the district court’s preliminary injunction barring Apotex from selling its proposed biosimilar until 180 days after post-licensure notice of first commercial marketing. The Federal Circuit held that 180 days’ notice was mandatory regardless of whether the biosimilar maker provided its regulatory application to the innovator as prescribed at the outset of the BPCIA procedures or not. The decision has impacted other district court litigation, including the Janssen v. Celltrion/Hospira and Amgen v. Hospira cases, since the biosimilar makers in those cases also argued that they did not need to provide 180 days’ notice of commercial marketing after being licensed by FDA.
In Rapid Litig. Mgmt. Ltd v. CellzDirect, Inc., the Federal Circuit reversed a ruling of patent invalidity under Section 101, reviving a biotech patent to a method of preserving hepatocytes, liver cells, for medical use. The Federal Circuit reversed the district court at both steps of the Supreme Court’s framework for patent eligibility set out in Mayo Collaborative Servs. v. Prometheus Labs., Inc., 132 S. Ct. 1289 (2012). In the wake of the Supreme Court’s recent denial of certiorari in Sequenom Inc., v. Ariosa Inc., where Sequenom sought guidance on the proper application of the Mayo two-step test, the Federal Circuit’s decision provides important guidance for how to determine patent eligibility for biotech inventions that build on natural discoveries. It also may help stem what many, including several Federal Circuit judges, have described as a crisis in medical innovation due to how courts and the Patent Office have applied Mayo.
Supreme Court Denies Sequenom’s Cert Petition, Leaving the Federal Circuit’s Interpretation of the Mayo/Alice Patent Eligibility Framework Intact For Now
The Supreme Court today denied Sequenom Inc.’s petition for writ of certiorari, in which Sequenom asked the Court to review a decision of the Federal Circuit invalidating its patent on a breakthrough prenatal diagnostic procedure. In denying the petition, the Court has declined to revisit the patent eligibility framework it set out in Mayo Collaborative Servs. v. Prometheus Labs. Inc., 132 S. Ct. 1289 (2012) and reaffirmed in Alice Corp. Pty. Ltd. v. CLS Bank International, 134 S. Ct. 2347 (2014).
Full Federal Circuit Denies En Banc Review of Jurisdictional Decision with Important Implications for BPCIA Litigation
On June 20, 2016, the full Federal Circuit declined to rehear Acorda Therapeutics Inc. v. Mylan Pharms. Inc., 817 F.3d 755 (Fed. Cir. 2016) en banc. Acorda affirmed two District of Delaware decisions finding specific jurisdiction over Mylan Pharms., an out-of-state ANDA filer, based on its plans to sell its proposed generic drugs in Delaware. After the Supreme Court’s decision in Daimler AG v. Bauman, 134 S.Ct. 746 (2014), Mylan has argued that it could only be sued in its home state of West Virginia in ANDA cases since future sales of its proposed generic drugs could not confer specific jurisdiction in Delaware. The Federal Circuit disagreed. Under Acorda, plaintiffs in ANDA cases as well as in cases brought under the Biologics Price Competition and Innovation Act (BPCIA) can bring suit in their forum of choice based on future sales of proposed generic or biosimilar products so long as considerations of fairness, such as efficiency or undue burden, do not render jurisdiction in the forum unreasonable.
Supreme Court Affirms Cuozzo – Leaving in Place BRI and Judicial Review Limitation for IPR Proceedings
In Cuozzo Speed Technologies, LLC v. Lee, No. 15-446, the Supreme Court affirmed the Federal Circuit’s holdings that an alleged defect in the PTO’s institution of an inter partes review (IPR) was not subject to judicial review even on appeal of a final decision, and that the PTO can apply the “broadest reasonable interpretation” claim construction standard in IPR proceedings. Over 30 amicus briefs were filed in this case, with pharma/biotech innovators urging the Court to reverse the Federal Circuit.
Amgen Appeals Ruling on Requirement to Produce Manufacturing Information for a Biosimilar Product under Amgen v. Sandoz
Amgen has appealed a partial denial of its motion to compel in Amgen v. Hospira, which sought discovery of the formulation for the cell culture media that Hospira uses to manufacture its proposed biosimilar of Amgen’s Epogen. Judge Andrews of the District of Delaware granted Amgen’s motion to the extent it sought information relevant to infringement of an asserted patent, but did not agree with Amgen’s broader argument that disclosure of manufacturing information was required under the Federal Circuit’s decision in Amgen v. Sandoz, which held that an innovator company can commence suit when a biosimilar maker fails to provide required information under the statutory process set forth in the Biologics Price Competition and Innovation Act of 2009 (BPCIA) and “access the required information through discovery.” Amgen’s discovery dispute with Hospira represents an important lesson in the aftermath of Amgen v. Sandoz. Innovator companies that assert only a subset of their manufacturing patents, as Amgen did, may only be able to obtain discovery relevant to those patents. As a result, innovator companies may choose to assert all of their manufacturing patents in order to obtain manufacturing information that biosimilar makers fail to provide under the BPCIA.
A 70-group coalition of healthcare stakeholders urged the FDA to incorporate meaningful and therefore memorable suffixes into its distinguishable naming system for biological medicines to provide strong patient protections and provider confidence. The coalition emphasized that “meaningful suffixes are easier for patients, providers and pharmacists to both recognize and remember, thus facilitating accurate association between adverse effects and specific products.” The coalition explained that meaningful suffixes based on the name of the manufacturer, such as the “sndz” suffix used for the first approved biosimilar, Sandoz’s Zarxio (filgrastim-sndz), instead of the random suffixes proposed in FDA’s most recent draft guidance and used for the first time in FDA’s recent approval of a second biosimilar, Celltrion and Pfizer’s Inflectra (infliximab-dyyb), would promote manufacturer accountability. Notably, FDA used a random suffix for the nonproprietary name of Inflectra despite widespread criticism by innovators and biosimilar makers alike of FDA’s naming approach.
In the last couple of years, a new gene editing technique called CRISPR has taken biology by storm. Scientists worldwide are using CRISPR to turn off, turn on and alter genes in living cells. CRISPR is so precise that it is expected to turn into a promising therapy for correcting genes in people, thereby curing devastating illnesses. Gene editing startups have burst onto the scene and industry has jumped in to develop this technology for therapeutic use. But CRISPR is now embroiled in a massive patent fight between the research institutions that lay claim to the technology. In January, the Patent Trial and Appeal Board (PTAB) declared an interference, an arcane and largely obsolete proceeding, to decide who was first to invent CRISPR gene editing in eukaryotic cells (using Cas9, a CRISPR associated protein), and thus who may be able to profit from its far-reaching applications.
Amgen’s Enbrel (etanercept), a blockbuster biologic treatment for a number of autoimmune diseases, including rheumatoid arthritis and psoriasis, has been an attractive target for biosimilar makers. Sandoz, the maker of Zarxio (filgrastim-sndz), the only biosimilar launched in the US to date, is also first in line with an Enbrel biosimilar in the US. Last October, Sandoz announced that FDA accepted its regulatory application for a proposed Enbrel biosimilar for review. Sandoz is seeking marketing approval for all of Enbrel’s medical indications. But Sandoz’s proposed Enbrel biosimilar brought litigation under the US biosimilars statute, the Biologics Price Competition and Innovation Act of 2009 (BPCIA).
On Thursday, FDA released draft guidance clarifying its position on labeling biosimilar products. While the guidance addresses some of the concerns raised by physicians and innovator companies, FDA’s guidance largely continues to treat biosimilars like generics for purposes of labeling.
Federal Circuit's Jurisdictional Decision for ANDA Cases Has Important Implications for BPCIA Litigation
The Federal Circuit affirmed two decisions by the District of Delaware to assert personal jurisdiction in ANDA cases over West Virginia-based manufacturer Mylan. Mylan had argued that it could only be sued in West Virginia in ANDA cases post the Supreme Court's decision in Daimler AG v. Bauman, 134 S.Ct. 746 (2014) because such cases are litigated before actual sales of its generic drug product are made in Delaware (and elsewhere). The Federal Circuit grounded its rejection of Mylan's approach on Mylan's filing of its ANDAs with the clear intent to market its proposed generic drugs in Delaware upon FDA approval, as well as the injury Mylan would cause in Delaware through such sales. Under the Federal Circuit's decision, plaintiffs in ANDA and BPCIA cases can obtain jurisdiction over defendants in their forum of choice based on defendants' regulatory filings with the intent to market their proposed products so long as consideration of fairness, such as undue burden on defendants, do not render jurisdiction in the chosen forum unreasonable.
Despite mixed results, biosimilar makers continue to turn to inter partes review (IPR) proceedings in order to challenge innovator patents protecting some of the most important biologics.
In the latest skirmish between Amgen and Sandoz under the U.S. biosimilars statute, the Biologics Price Competition and Innovation Act of 2009 (BPCIA), Amgen has filed a new declaratory judgment claim alleging violations of the BPCIA. As described in Amgen’s March 4 complaint, after filing an application for a biosimilar version of Amgen’s cancer drug Neulasta, Sandoz cut short the BPCIA patent dance and demanded that Amgen file an immediate patent infringement suit, claiming that Amgen would otherwise lose its rights to seek lost profits and injunctive relief. Amgen responded with a suit for a declaration that it had no obligation to go forward with the immediate litigation phase of the BPCIA after Sandoz cut off the pre-suit procedures.
In 2015, FDA issued a number of final guidance documents for biosimilars but many fundamental questions remain unsettled, including the requirements for labeling of biosimilars, interchangeability, and naming. There is much ahead for the US biosimilars pathway in 2016.
2015 was a landmark year for biosimilars. It began with the approval of the first US biosimilar, Sandoz’s Zarxio, in March 2015 under the biosimilars pathway. Zarxio entered the US market in September. Many expected the floodgates to open after Zarxio’s approval but Zarxio remains the only approved US biosimilar to this day, although that is expected to change this year. Seven other biosimilar applications were filed in 2014/2015 and are either being reviewed by FDA or have to be refiled. Most of these applications are to complex biologics. 2016 should provide significant insights into how FDA determines biosimilarity and extrapolation for these complex products.
On January 26, 2016, the World Health Organization (WHO) unveiled the final version of its proposal for a worldwide biosimilar naming convention. The WHO proposes to add a “biologic qualifier” (BQ), which consists of four random consonants and an optional two-digit checksum, as an identifier that follows the nonproprietary name of each biologic and biosimilar product. This proposal resembles FDA’s biosimilar naming proposal, which adds four random consonants as a suffix to nonproprietary names. Industry and healthcare stakeholders have criticized FDA’s proposal to use random suffixes, instead of meaningful—and therefore memorable—ones, due to a greater likelihood of reporting and prescription errors with meaningless names. The WHO proposal, which uses a randomly generated separate identifier, is likely to draw similar criticism.
Earlier this week, the Patent Trial and Appeal Board (PTAB) set the stage for what is expected to be an epic battle over who owns the intellectual property rights to “the biggest biotech discovery of the century.” On January 11, 2016, the PTAB declared an interference to decide who was first to invent the use of the groundbreaking gene-editing technique known as CRISPR in eukaryotic cells. The CRISPR proceeding may be one of the last great biotech interferences. The claims at issue are viewed by many as the “holy grail” for correcting and curing human genetic diseases and interferences will ultimately become obsolete under the America Invents Act.
The Federal Circuit Will Hear Apotex’s Appeal from a Preliminary Injunction Under the BPCIA in Early 2016
In early 2016, the Federal Circuit will hear Apotex’s appeal from a preliminary injunction barring Apotex from selling its proposed Neulasta biosimilar for 180 days after FDA approval. Briefing will be complete on February 12, 2016, and the Federal Circuit agreed to place the case on the oral argument calendar soon thereafter. Apotex had asked for a more expedited schedule but was not able to provide any specific evidence of when its proposed biosimilar product will be approved.
On November 19, 2015, the European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) gave a positive opinion, recommending marketing authorization of Samsung Bioepis’s Benepali, the first biosimilar of Enbrel (etanercept), in Europe. Enbrel is a blockbuster treatment for rheumatoid arthritis and a number of other autoimmune conditions associated with elevated levels of tumor necrosis factor alpha (TNF-alpha), a protein that plays an important role in promoting inflammation. The CHMP recommended approval of Benepali for these conditions. In the US, FDA recently accepted Sandoz’s regulatory application for its proposed biosimilar of Enbrel for review. Sandoz is seeking approval for all of Enbrel’s indications. FDA’s review of Sandoz’s proposed biosimilar will provide important information on the requirements for biosimilarity and extrapolation for complex biologic products.
FDA has received comments from more than 170 groups on its proposal for naming biosimilars. Biosimilar makers, insurers and pharmacies largely oppose distinct nonproprietary names (also known as proper names) for biosimilars. By contrast, innovators (including those that develop biosimilars), healthcare providers and patient advocacy groups view them as critical to ensuring patient safety. However, most stakeholders in both camps urged FDA to use meaningful suffixes to distinguish biosimilars from originator products rather than suffixes “devoid of meaning.” FDA proposed to add meaningless suffixes to the nonproprietary names of originator products to address concerns of biosimilar makers that distinct names would discourage adoption of biosimilar products. But biosimilar makers expressed concern that such meaningless suffixes will lead to a variety of errors and ultimately endanger public safety. FDA may now revisit its proposal given the largely uniform preference of innovators and biosimilar makers alike for meaningful and memorable nonproprietary names, such as those that identify the manufacturer of the biologic.
In its draft guidance, FDA proposed distinguishable nonproprietary names for biosimilars to promote the safety of patients receiving biologic medicines and minimize inadvertent substitution of biologics that have not been determined to be interchangeable. FDA did not make a proposal for naming interchangeable biological products. Instead, FDA requested comments on how to name such products in addition to seeking comments on its approach to naming biosimilars. Stakeholders’ comments are now in. Innovator companies (including those that also develop biosimilars), healthcare providers and patient advocacy groups favor distinguishable nonproprietary names for biosimilars. Biosimilar makers, insurers, pharmacies, and the FTC, by contrast, largely fall into a different camp; they argue that distinct names are unnecessary for monitoring biosimilars and will likely bias providers against prescribing them. Notably, the two camps came together on the naming of interchangeable products. Since interchangeable products will likely first be approved as biosimilars, both camps advocated keeping the initial biosimilar name rather than changing it after approval as an interchangeable product. As a result of this unified view, FDA is likely to expand the naming approach it ultimately adopts for biosimilars to interchangeable products.
At long last, the final text of the Trans-Pacific Partnership, a free trade agreement among a dozen Pacific Rim nations, has now been made available to the public. The chapter on intellectual property, however, does not appear to have any material changes relating to exclusivity for new biologics from the leaked draft released by WikiLeaks last month. Just as the provisions in the leaked draft did, Articles 18.50 and 18.52 give countries a choice between, on the one hand, at least eight years of exclusivity or, on the other hand, at least five years of exclusivity plus unspecified “other measures” and protection through “market circumstances.” Additionally, the agreement seems to provide for only market exclusivity, not data exclusivity. The TPP bars biosimilar applicants from entering the market during the exclusivity period, but does not appear to prevent them from accessing innovators’ regulatory data.
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