Combination of HX008 And Niraparib in GErm-line-mutAted Metastatic Breast Cancer

Subjects received intravenous HX008 at a fixed dose of 200mg, administered every 3 weeks, and 200mg of Niraparib orally per day.Every 3 weeks is a cycle.

Subjects received intravenous HX008 at a fixed dose of 200mg, administered every 3 weeks, and 200mg of Niraparib orally per day.Every 3 weeks is a cycle.

Subjects received intravenous HX008 at a fixed dose of 200mg once every 3 weeks; 200mg Niraparib orally per day;Trastuzumab 8mg/kg in the first cycle and 6mg/kg after the first cycle intravenously once every 3 weeks; Every 3 weeks is a cycle.

"HER-2 negative subjects received intravenous HX008 at a fixed dose of 200mg, administered every 3 weeks, and 200mg of Neirapali orally per day. Every 3 weeks is a cycle.~Her-2 positive subjects received intravenous HX008 at a fixed dose of 200mg once every 3 weeks; 200mg Niraparib orally per day; Pyrrolitinib is taken orally at 400mg per day; Every 3 weeks is a cycle."