The present invention aims at providing a medicament and a method for promoting replication of hepatocytes and a medicament and a method for ameliorating insulin resistance.An effective amount of a neutralizing agent for CXCL10 belonging to a subfamily of chemokines which are heparin-binding proteins is administered to the hepatocytes to promote the replication of the hepatocytes. As the neutralizing agent for CXCL10, a factor which is specifically bound to CXCL10 and inhibits an activity of CXCL10 or a factor which inhibits CXCL10 expression is suitably used. By administering the neutralizing agent to impaired hepatic tissue, it is possible to restore and regenerate the hepatic tissue. Meanwhile, by administering an effective amount of the neutralizing agent for CXCL10 to the hepatocytes, the insulin resistance in type II diabetes and metabolic syndrome is ameliorated.
