Abstract: Apelin receptor modulators can improve physical performance, slow progression of age-related frailty, and can reduce age-related muscle weakness in human patients. This disclosure provides methods for treating muscle conditions using a particular class of apelin receptor modulators (e.g., agonists). The muscle condition can be an age-related muscle condition. Also provided is a method for maintaining and/or increasing muscle mass, muscle function, and/or muscle strength in an elderly subject by administration of the apelin receptor modulator. In some embodiments, the apelin receptor modulator (e.g., agonist) is BGE-105, or a pharmaceutically acceptable salt thereof.

Abstract: Provided are methods for expanding stem cells and/or lineage committed progenitor cells, such as hematopoietic stems cells and/or lineage committed progenitor cells, at least in part, by using compounds that antagonize AhR. The compounds are represented by formulae: wherein the letters and symbols a, b, c, d, e, f, g, Z, R1b, R2a and R2b have the meanings provided in the specification. Also provided are compositions comprising stem cells and/or lineage committed progenitor cells expanded by methods disclosed herein and methods for the treatment of diseases treatable by same.

Abstract: Provided are methods for expanding stem cells and/or lineage committed progenitor cells, at least in part, by using lactam compounds that antagonize AhR. The compounds are represented by formula (I): wherein the letters and symbols X1, X2, Z, R1b, R1c, R1d, R1e, R2a, R2b, R2c and R2d have the meanings provided below. Also provided are compositions comprising stem cells and/or lineage committed progenitor cells expanded by methods disclosed herein and methods for the treatment of diseases treatable by same.