HE4 is also known as WAP four-disulfide core domain protein 2 and Major epididymis-specific protein E4. HE4 is a product of the WFDC2 (HE4) gene that is overexpressed in patients with ovarian carcinoma. Using an immunoassay, a small study indicated comparable sensitivity for CA-125 and HE4 in postmenopausal women with ovarian cancer.
Circulating Biomarkers and Outcome from a Randomised Phase Ii Trial of Sunitinib Vs Everolimus for Patients with Metastatic Renal Cell Carcinoma (2016) Voss MH, Chen D, Marker M, Hakimi AA, Lee C-H, Hsieh JJ, Knox JJ, Voi M, Motzer RJ British Journal of Cancer
Serum folate receptor alpha, mesothelin and megakaryocyte potentiating factor in ovarian cancer: association to disease stage and grade and comparison to CA125 and HE4 (2013) O'Shannessy DJ, Somers EB, Palmer LM, Thiel RP, Oberoi P, Heath R, Marcucci L Journal of Ovarian Research 2013, 6:29
Comprehensive serum profiling for the discovery of epithelial ovarian cancer biomarkers (2011) Yip P, Chen TH, Seshaiah P, Stephen LL, Michael-Ballard KL, Mapes JP, Mansfield BC, Bertenshaw GP PLoS One. 2011;6(12):e29533. Epub 2011 Dec 21