The present invention relates to a composition for inducing liver disease in a mammal and a mammal with a liver disease induced using the same. The animal model of the present invention has been found to be an excellent animal model in which fatty liver, hepatic fibrosis, and insulin resistance are evenly induced, and which successfully reproduces the progression of a series of severe liver diseases, from hepatitis and excessive fibrogenesis in liver tissue through tissue hardening (cirrhosis) to liver cancer, and reflects the characteristics of each stage with high reliability. Accordingly, the present invention may be useful as a means for developing a therapeutic agent for chronic liver disease as well as studying the molecular and circulatory mechanisms of each stage of liver disease.

A method for changing a condition of an eyelid of a hairless animal, a model animal for evaluating a therapeutic or prophylactic effect against an eyelid disease obtained by the method, a method for producing the model animal, a method of screening using the model animal and a substance having a therapeutic or prophylactic effect against an eyelid disease selected by the method of screening, and a therapeutic or prophylactic agent against an eyelid disease containing the substance as an active ingredient.

The invention relates to a viral expression construct and related viral vector and nucleic acid molecule and composition and to their use wherein said construct and vector are suitable for expression in a mammal and comprise a nucleotide sequence encoding a Fibroblast growth factor 21 (FGF21) to be expressed in liver, adipose tissue and/or skeletal muscle.