The present invention relates to methods and compositions for the treatment and/or prevention of diseases such as allergic diseases and inflammatory bowel diseases comprising one or more FIBCD1 binding molecules or pharmaceutically acceptable salts, esters, and amides thereof and optionally one or more non-FIBCD1 binding molecules or pharmaceutically acceptable salts, esters, and amides thereof； as well as the use of such pharmaceutical composition for the prevention and/or treatment of diseases such as allergic diseases and inflammatory bowel diseases. FIBCD1 is herein defined as either a transmembrane receptor, the corresponding DNA or the corresponding mRNA as defined by SEQ ID No. 1, 2 and 3 as well as homologous thereof.
