The invention relates generally to biomarkers, methods and kits to predict therapy response in patients, in particular in patients having inflammatory bowel disease (IBD). Provided is a method for predicting whether a human subject is likely to show a clinical response to therapy with an antibody or pharmacological antagonist that targets α4β7 integrin, preferably vedolizumab induction therapy, comprising (i) determining the level of eotaxin-1 in a sample obtained from the subject, and; (ii) classifying the subject as a responder based on the leve of eotaxin-1