NCIt definition : Mesothelin (630 aa, 69 kDa) is encoded by the human MSLN gene. This protein may play
a role in cellular adhesion.;
Alternative definition : NCI-GLOSS: A protein found on the surface of certain types of normal cells and cancer
cells. Mesothelin may help these cells stick together and send signals. A higher-than-normal
amount of mesothelin is found on some cancer cells, including mesothelioma, pancreatic
cancer, and ovarian cancer.;
NCIt note : An antibody that reacts with ovarian cancers and mesotheliomas was used to isolate
a cell surface antigen named mesothelin. Although the function of mesothelin is unknown,
it may play a role in cellular adhesion and is present on mesothelium, mesotheliomas,
and ovarian cancers. Three transcript variants have been described for this gene and
their protein products were initially named megakaryocyte potentiating factor (MPF),
mesothelin, and the soluble member(s) of the mesothelin/MPF family. The protein isoform
named MPF is a cytokine with megakaryocyte potentiating activity. The soluble member
encoded by the third splice variant is detected in ovarian carcinoma; the full length
sequence of the third variant has not been described. (LocusLink);