Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

1. Age ≥ 18 years
2. Histologically or cytologically-documented breast cancer (HER2 status and ER/PgR status must be known)
3. Brain metastasis from breast cancer with or without prior WBRT
4. At least one radiologically-confirmed and measurable metastatic brain lesion (≥ 1.0 cm in the longest diameter) by Gd-MRI of the brain \< 14 days prior to first dose (Metastatic brain lesions previously treated with SRS may not be target or non-target lesions)
5. Patients must be neurologically stable: On stable doses of corticosteroids and anticonvulsants (not EIAEDs, including phenytoin, phenobarbitol, carbamazepine, fosphenytoin, primidone, oxcarbazepine) for ≥ 5 days prior to obtaining the baseline Gd-MRI of the brain and ≥ 5 days prior to first dose
6. KPS ≥ 70%
7. Completed WBRT for intra-cranial lesions ≥ 28 days prior to first dose

1. NCI CTCAE v4.0 Grade ≥ 2 neuropathy
2. CNS disease requiring immediate neurosurgical intervention (e.g., resection, shunt placement, etc.)
3. Known leptomeningeal disease

GRN1005 Alone or in Combination With Trastuzumab in Breast Cancer Patients With Brain Metastases