Abstract: In certain aspects, the disclosure provides compositions and methods for treating spinal muscular atrophy. For example, in some embodiments, the disclosure provides ALK4:ActRIIB antagonists that may be used to treat spinal muscular atrophy, particularly treating one or more complications of spinal muscular atrophy including, for example, increasing muscle mass muscle strength, and bone mineral density.

Abstract: In certain aspects, the present disclosure relates to methods of treating chronic liver disease, portal hypertension, primary sclerosing cholangitis, and hepatopulmonary syndrome, particularly associated clinical complications such as, for example, pulmonary fibrosis and/or interstitial lung disease (ILD), methods comprising administering T?RII antagonists comprising a heterologous domain and a truncated, ligand-binding portion of the extracellular domain of T?RII polypeptide useful to selectively antagonize a T?RII ligand. The disclosure further provides methods for treating one or more complications associated with chronic liver disease, including interstitial lung disease (ILD) and pulmonary fibrosis, with T?RII antagonists of the present disclosure.

Abstract: In certain aspects, the present disclosure relates to methods of treating Hermansky-Pudlak Syndrome (HPS) using a T?RII antagonist. In part, the disclosure provides T?RII antagonists comprising a heterologous domain and a truncated, ligand-binding portion of the extracellular domain of T?RII polypeptide useful to selectively antagonize a T?RII ligand. The disclosure further provides methods for treating one or more complications associated with HPS, including complications associated with fibrosis and/or the lung (e.g., pulmonary fibrosis, interstitial lung disease (ILD)).

Abstract: In certain aspects, the present invention provides compositions and methods for increasing red blood cell and/or hemoglobin levels in vertebrates, including rodents and primates, and particularly in humans.

Abstract: In certain aspects, the present invention provides compositions and methods for altering iron metabolism to increase red blood cell and/or hemoglobin levels in vertebrates, including rodents and primates, and particularly in humans.

Abstract: In certain aspects, the present invention provides compositions and methods for increasing red blood cell and/or hemoglobin levels in vertebrates, including rodents and primates, and particularly in humans.

Abstract: In part, the present disclosure relates methods for treating, preventing, or reducing the severity of a myeloproliferative disorder (e.g., polycythemia vera, essential thrombocythemia, and myelofibrosis) or one or more complications of a myeloproliferative disorder. The present disclosure further relates methods for treating, preventing, or reducing the severity of a Janus kinase-associated disorder or one or more complications of a Janus kinase-associated disorder. In certain aspects the disclosure provides T?RII antagonists for treating, preventing, or reducing the severity of a myeloproliferative disorder (e.g., polycythemia vera, essential thrombocythemia, and myelofibrosis) or a Janus kinase-associated disorder or one or more complications of a myeloproliferative disorder or a Janus kinase-associated disorder.

Abstract: In certain aspects, the present disclosure provides compositions and methods for increasing red blood cell and/or hemoglobin levels in a subject in need thereof. Subjects in need include, for example, subjects having anemia and/or ineffective erythropoiesis as a result of having reduced GATA-1, heat shock factor and/or NFE2 levels as compared to the levels in a reference population.

Abstract: In certain aspects, the disclosure provides compositions and methods for treating spinal muscular atrophy. For example, in some embodiments, the disclosure provides ALK4:ActRIIB antagonists that may be used to treat spinal muscular atrophy, particularly treating one or more complications of spinal muscular atrophy including, for example, increasing muscle mass muscle strength, and bone mineral density.

Abstract: In part, the present disclosure relates methods for treating, preventing, or reducing the severity of a myeloproliferative disorder (e.g., polycythemia vera, essential thrombocythemia, and myelofibrosis) or one or more complications of a myeloproliferative disorder. The present disclosure further relates methods for treating, preventing, or reducing the severity of a Janus kinase-associated disorder or one or more complications of a Janus kinase-associated disorder. In certain aspects the disclosure provides T?RII antagonists for treating, preventing, or reducing the severity of a myeloproliferative disorder (e.g., polycythemia vera, essential thrombocythemia, and myelofibrosis) or a Janus kinase-associated disorder or one or more complications of a myeloproliferative disorder or a Janus kinase-associated disorder.