Amgen Inc. v. Hoechst Marion Roussel, Inc.

579 F. Supp. 2d 199, 2008 U.S. Dist. LEXIS 77025, 2008 WL 4435428
CourtDistrict Court, D. Massachusetts
DecidedOctober 2, 2008
DocketCivil Action 97-10814-WGY
StatusPublished

This text of 579 F. Supp. 2d 199 (Amgen Inc. v. Hoechst Marion Roussel, Inc.) is published on Counsel Stack Legal Research, covering District Court, D. Massachusetts primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Amgen Inc. v. Hoechst Marion Roussel, Inc., 579 F. Supp. 2d 199, 2008 U.S. Dist. LEXIS 77025, 2008 WL 4435428 (D. Mass. 2008).

Opinion

MEMORANDUM AND ORDER

YOUNG, District Judge.

Amgen brought this action seeking a declaratory judgment of infringement of several patents related to recombinant er-ythropoietin (“EPO”), which mimics a naturally occurring hormone that stimulates production of red blood cells. Amgen, Inc. v. Hoechst Marion Roussel, Inc., 339 F.Supp.2d 202, 213 (D.Mass.2004) [hereinafter “Amgen III ”]. Over the past decade, the Court has taken evidence in two bench trials, and this Court’s opinions have twice been appealed to the Federal Circuit. See Amgen, Inc. v. Hoechst Marion Roussel, Inc., 457 F.3d 1293, 1296-97 (Fed.Cir.2006) [hereinafter “Amgen IV”]. 1 In its most recent opinion, the Federal Circuit vacated this Court’s construction of the term “therapeutically effective” in claim 1 of U.S. Patent No. 5,955,422. Id. at 1303. On remand, the Court must answer one question: Did EPO purified from the urine of Japanese aplastic anemia patients and administered to three patients by Dr. Eugene Goldwasser anticipate claim 1 of the '422 patent? Simply put, no.

Claim 1 of the '422 patent teaches:

A pharmaceutical composition comprising [2] a therapeutically effective amount of human erythropoietin [3] and a pharmaceutically acceptable diluent, adjuvant[,] or carrier, [4] wherein said erythropoietin is purified from mammalian cells grown in culture.

'422 pat. col. 3811. 36-41.

The Court must reject TKT/HMR’s anticipation challenge because TKT/HMR has failed to demonstrate with clear and convincing evidence that the Goldwasser reference embodied two of these limitations. See In re Omeprazole Patent Litig., *201 483 F.3d 1364, 1371 (Fed.Cir.2007) (noting that a defendant seeking to invalidate a claim via anticipation must prove that each element was disclosed in a single prior art reference). TKT/HMR has demonstrated with clear and convincing evidence that Dr. Goldwasser’s urinary preparation was “a pharmaceutical composition” and “a pharmaceutically acceptable diluent, adju-vant[,] or carrier.” The Court cannot conclude, however, that the urinary EPO administered in the Goldwasser study was “therapeutically effective” because TKT/ HMR has failed to prove with clear and convincing evidence that the urinary EPO actually caused an increase in reticulocyte count or an increase in ferrokinetic effects. Although Dr. Goldwasser stated that he observed a slight increase in reticulocyte count in three patients and an increase in plasma iron clearance in two patients, these observations lack a firm statistical foundation. The three-patient study did not rely on adequate baseline data, did not employ controls, and was ultimately discontinued before Dr. Goldwasser could collect sufficient data to draw conclusions about a causal link between urinary EPO and the purportedly observed effects. In light of this incomplete data, the fact that the Goldwasser preparation did not increase the hematocrit of any patient and the fact that Dr. Goldwasser and his collaborator Dr. Joseph Baron did not publish their results for peer review cast further doubt on TKT/HMR’s assertions. Finally, the Federal Circuit has upheld this Court’s conclusion that “purified from mammalian cells grown in culture” limits the source of the product taught in claim 1. Amgen II, 314 F.3d at 1329. It is undisputed that the EPO in the Goldwasser study was purified from the urine of aplastic anemia patients.

I. BACKGROUND

EPO is a naturally occurring hormone produced in the kidneys and liver that travels through the bloodstream and into bone marrow to stimulate the production of red blood cells. See Amgen III, 339 F.Supp.2d at 214. EPO produces red blood cells by bonding with EPO receptors in the bone marrow to generate reticulo-cytes, which are “newly formed red cells.” Def.’s App. [Doc. No. 864, Exh. 1], Gold-wasser Dep. Tr. at 184. Most of these reticulocytes blossom into red blood cells, which are critical because they contain hemoglobin, the vehicle for transporting oxygen to the body. Amgen III, 339 F.Supp.2d at 214. Erythropoiesis, the process of producing red blood cells, occurs continuously throughout a person’s life in order to offset the natural destruction of red blood cells. Id. People whose kidneys do not function properly, however, do not produce enough EPO to keep up with the rate of cell destruction. Id.

A primary indicator of the effectiveness of an anemia treatment is its effect on a patient’s hematocrit. See id. Hematocrit measures the ratio of red blood cells relative to the total volume of blood and is indicative of the blood’s ability to supply oxygen to the body. Id. “Under normal conditions, a person has a hematocrit of about forty-five to fifty, which means forty-five to fifty percent of the blood is made up of red blood cells.” Id. Patients suffering from kidney failure have a low hemato-crit due to their kidneys’ failure to produce sufficient EPO. See id. Introducing exogenous EPO into the bloodstream of persons suffering from kidney failure can allow a patient suffering from anemia to overcome the red blood cell deficit. See id.

A. Race for the Prize

Scientists first identified the hormone regulating red blood cell production in 1906. Def.’s App. Exh. 18A [Doc. No. 864], Testimony of Dr. E. Goldwasser Be *202 fore the International Trade Commission in Investigation No. 337-TA-281 as it was Submitted to the U.S. Patent & Trademark Office with Notice III by Lin Under 37 CFR 1.682(a), at 7-8 [hereinafter “Gold-wasser ITC Tr.”]. By the early 1950’s, Finnish scientists had dubbed the hormone erythropoietin, ‘erythro’ meaning red, to signify the specificity of its action.” Id. at 9. Through the 1950s, researchers sought to isolate EPO, learn more about its properties and reduce it to a therapeutic agent. See id. at 9-12. Although it was apparent that introduction of exogenous EPO into the bloodstream could increase the hemat-ocrit of an anemia patient, obtaining EPO from natural sources proved extraordinarily difficult because EPO is produced in small quantities, even in the healthy body. Amgen Inc. v. Hoechst Marion Roussel, Inc., 314 F.3d 1313, 1321 (Fed.Cir.2003) [hereinafter “Amgen II ”]. “Early attempts to recover EPO from plasma or from human urine ... were unsuccessful because such recovery employed techniques that were complicated, yet still resulted in a low-yield, high-impurity, or unstable EPO end product.” Id.

Dr.

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579 F. Supp. 2d 199, 2008 U.S. Dist. LEXIS 77025, 2008 WL 4435428, Counsel Stack Legal Research, https://law.counselstack.com/opinion/amgen-inc-v-hoechst-marion-roussel-inc-mad-2008.