Safety and Blood Immune Cell Study of Anakinra Plus Physician's Chemotherapy Choice in Metastatic Breast Cancer Patients

Patients will undergo a 2-week run-in treatment of daily anakinra alone. This will be followed by daily anakinra (100 mg SC) plus the physician's chemotherapy ( TPC) choice of standard of care (SOC) for a maximum of 6 months.TPC choice includes nab paclitaxel (100 mg/m\^2 Intravenous on day 1,8 \&15 of a 28 day cycle), or capecitabine (1000mg/m\^2 per oral; BID choice: 14 days on, 7 days off OR 7 days on, 7 days off of a 21 day cycle), or eribulin (1.4 mg/m\^2 intravenous on day 1 \& 8 of a 21 day cycle), or vinorelbine (25mg/m\^2 on day 1,8,15 of a 28 day cycle). After 6 months, patients may continue their SOC treatment alone until disease progression or intolerable toxicity.