The invention discloses application of an SRGN
gene and polypeptide thereof in serving as a detection marker for
breast cancer molecular typing, in particular to application of the SRGN
gene and the polypeptide thereof in serving as a serum marker for detecting a triple-negative
breast cancer or in preparation of a detection
reagent for the triple-negative
breast cancer, and provides a novel breast
cancer serum marker, that is, the SRGN
gene and the polypeptide thereof. It is proved that expression of the SRGN gene in breast
cancer serum is enhanced, and expression of the SRGN gene in serum of a triple-negative breast
cancer patient is mainly and significantly increased compared with expression of the SRGN gene in serum of a breast cancer patient with the other molecular types. Accordingly, not only is a new target supplied to breast cancer
serology detection, but also new data and a quick
serology detection method are supplied to breast cancer
molecular typing; a
new chemical entity is designed at the gene level and the
protein level by taking the gene as the target, breast cancer
molecular typing can be quickly, conveniently and effectively performed, and therefore the breast
cancer treatment effect is improved.