The present invention provides a method for treating or preventing a renal injury-related disease such as diabetic nephropathy comprising administering to a mammal a therapeutically effective amount of 2-({[7-hydroxy-5-(2-phenylethyl)-[1,2,4]triazolo[1,5-a]pyridin-8-yl]carbonyl}amino)acetic acid or a pharmaceutically acceptable salt thereof, and a novel pharmaceutical use of the aforementioned compound such as a pharmaceutical composition for treating or preventing a renal injury-related disease and the like comprising the aforementioned compound or a pharmaceutically acceptable salt thereof.