Sperm protein associated with the nucleus on the X chromosome C (SPANXC)

Sperm protein associated with the nucleus on the X chromosome C (SPANXC) is a member of the SPANX gene family, which encodes cancer/testis antigens restricted to testis and spermatozoa in normal tissues but aberrantly expressed in a range of cancers—including melanoma, breast cancer, hematological malignancies, and metastases. SPANXC participates in nuclear organization, chromatin structure regulation, and RNA processing, and is implicated in processes fundamental to cancer such as cell proliferation, migration, and metastatic potential. These physiological roles include contributing to spermatozoa motility and mitochondrial metabolism, connecting fertility and cancer biology. As a CTA, SPANXC functions as a promising candidate for cancer immunotherapy, given its restricted expression pattern and immunogenicity. Current therapeutic strategies targeting SPANXC are investigational, mainly in the form of immunotherapies. Expression levels of SPANXC may serve as biomarkers for aggressive cancer subtypes or metastatic risk. Safety profiles for therapies aimed at CTAs like SPANXC must balance immune activation and preservation of reproductive functions.

Other names

Cancer/testis antigen 11.3Cancer/testis-associated protein CTp11Nuclear-associated protein SPAN-XcCancer/testis antigen family 11, member 3CTp11SPANX-CCT11.3Cancer/testis-associated protein of 11 kDSperm protein associated with the nucleus, X chromosome, family member CCancer/testis antigen family 11SPANX family member CSPANX-E (sometimes cross-referenced)SPANXE (sometimes used)

Immunotherapy approaches: SPANXC, as a cancer/testis antigen, can be targeted by cancer vaccines and adoptive T-cell therapies, aiming to elicit immune responses against tumors expressing SPANXC.