In certain aspects, the disclosure provides soluble heteromeric polypeptide complexes comprising an extracellular domain of an ALK4 receptor and an extracellular domain of ActRIIB. In certain aspects, such soluble ALK4:ActRIIB complexes may be used to regulate (promote or inhibit) growth of tissues or cells including, for example, muscle, bone, cartilage, fat, neural tissue, tumors, and/or cancerous cells. In certain aspects, such ALK4:ActRIIB complexes are can be used to improve muscle formation, bone formation, metabolic parameters, and disorders associated with these tissues, cellular networks, kidney, and endocrine systems.
在某些方面,本公开提供了包含 ALK4 受体胞外结构域和 ActRIIB 胞外结构域的可溶性异构
多肽复合物。在某些方面,这种可溶性 ALK4:ActRIIB 复合物可用于调节(促进或抑制)组织或细胞的生长,例如包括肌肉、骨骼、软骨、脂肪、神经组织、肿瘤和/或癌细胞。在某些方面,此类 ALK4:ActRIIB 复合物可用于改善肌肉形成、骨骼形成、代谢参数以及与这些组织、细胞网络、肾脏和内分泌系统相关的疾病。