Provided are: composition and methods for: treating aging or an age-related condition, symptom or disease; stimulating hair growth, regrowth or pigmentation (or preventing hair loss); for increasing the expression of an adenosine receptor in dermal cells (in combination with hair growth); for treating a condition or disease of the skin or at least one symptom thereof, including cosmetic treatment (e.g., wrinkles, hyperpigmentation, redness, rosacea, dryness, cracking, loss of firmness, loss of elasticity, thinning, and loss of vibrance). The methods comprise administering a sufficient amount of the disclosed CBP/catenin (e.g., CBP/