The invention provides an application of
catechin as a diagnostic target in preparation of a uremic pruritus diagnostic product, and relates to the technical field of
biomedicine, the technical key points are as follows: in the application, uremic pruritus micromolecular substances are found by using serum of a uremic patient to carry out a non-targeted metabonomics technology, and generally, the application of
catechin as a diagnostic target in preparation of a uremic pruritus diagnostic product has a good clinical application prospect. Metabolic profiles of serum from human subjects diagnosed with uremic pruritus, including pre-
dialysis pruritus, post-
dialysis transient remission, and non-remission of pre-
dialysis pruritus, are determined. Metabolic profiles from the two groups of biological samples are compared, and differential molecules exist in the metabolic profiles from the two groups of patients suffering from uremic pruritus. According to the invention, through non-targeted metabonomics, a significantly different molecule
catechin which the pruritus of a
uremia patient is not relieved before and after dialysis and the pruritus is temporarily relieved after dialysis is screened out, the catechin is injected into the
cheek part of a normal mouse, and the pruritus conditions of the two mouse models are detected through behavioristics. And the evidence of mouse pruritus caused by the catechin is provided through a
verification test.