Amgen Inc.

Timothy D Bartley

Gary M Fox

William James Boyle

Andrew A Welcher

Vann P Parker

Richard A Lindberg

Ella Magal

Olaf B Kinstler

Robert A Bosselman

Babru B Samal

Pamela Hunt

Jakob M Bogenberger

Ligands which bind to the eck receptor are disclosed. More particularly, polypeptides which bind specifically to the eck receptor (eck receptor binding proteins or EBPs) and DNA sequences encoding said polypeptides are disclosed. Methods of treatment using eck receptor ligands and soluble eck receptor and disclosed, as are pharmaceutical compositions containing same. A rapid and sensitive method for the detection of receptor binding activity in crude samples is provided.

Eck receptor ligands

Polypeptides which bind to one or more EPH-like receptors, particularly the HEK4 receptor, are described. The polypeptides are designated HEK4 binding proteins. Nucleic acids encoding HEK4 binding proteins, and expression vectors, host cells and processes for the production of the polypeptides are also described. The polypeptides are useful for modulating the growth and/or differentiation of a variety of tissues, including those from liver, kidney, lung, skin, digestive tract and nervous system and may be used to regenerate damaged or depleted tissue and to treat cancer or nervous system disorders.

Antibodies to ligands for HEK4 receptors

Ligands for EPH-like receptors

Nucleic acids encoding ligands for HEK4 receptors

Disclosed are novel proteins, referred to as megakaryocyte growth and development factors (MGDFs; also generally referred to as Mpl ligands or thrombopoietin, that have a biological activity of stimulating the growth of megakaryocytes and augmenting the differentiation or maturation of megakaryocytes, ultimately to result in the production of platelets. MGDF derivatives comprising MGDF molecules attached to water soluble polymers, such as polyethylene glycol, are also disclosed, along with methods for their preparation. Also disclosed are processes for obtaining the MGDFs in homogeneous form from natural sources and producing them by recombinant genetic engineering techniques from mammals, including humans.

Mono-pegylated proteins that stimulate megakaryocyte growth and

Disclosed are novel proteins, referred to as megakaryocyte growth and development factors (MGDFs; also generally referred to as Mpl ligands), that have a biological activity of stimulating the growth of megakaryocytes and augmenting the differentiation or maturation of megakaryocytes, ultimately to result in the production of platelets. MGDF derivatives comprising MGDF molecules attached to water soluble polymers, such as polyethylene glycol, are also disclosed, along with methods for their preparation. The MGDF proteins and derivatives are useful in methods for treating mammals to increase platelets and/or megakaryocytes. Also disclosed are processes for obtaining the MGDFs in homogeneous form from natural sources and producing them by recombinant genetic engineering techniques from mammals, including humans.

Method for treating mammals with monopegylated proteins that stimulates

Nucleic acids encoding eck receptor ligands

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Thousand Oaks, CA, United States of America

Timothy D Bartley