Her2 Chimeric Antigen Receptor Expressing T Cells in Advanced Sarcoma

Each patient will receive one intravenous injection of autologous HER2-specific T cells at one of the dose levels. If the patient has stable disease or a reduction in the size of the tumor they can receive additional doses of HER2-specific T cells at 6 to 12 weeks intervals-each of which will consist of the same cell number as their HER2-specific T-cell injection. For the first two subsequent HER2-specific T-cell infusions, patients will be able to receive additional lymphodepleting chemotherapy according to their dose levels.

"Fludarabine will be administered for 5 days prior to the T cells~The dose:~\>10 kg: 25 mg/m2/day;~\<10 kg: 1 mg/kg/day IV over 30 minutes"

"Cyclophosphamide will be administered for 2 days.~Fludarabine and cyclophosphamide will be given for 2 days, followed by fludarabine alone for the next 3 days, followed by 2 days of rest, before the T cells will be administered.~Cyclophosphamide Dose:~30 mg/kg/day IV over 1 hour (with Mesna and IV hydration)~Fludarabine Dose:~\>10 kg: 25 mg/m2/day; \<10 kg: 1 mg/kg/day IV over 30 minutes"

Patient will receive one intravenous injection of autologous CAR T cells at dose level 9C. Further CAR T-cell dose escalation at dose level 9C will be done using the lymphodepletion schema as in dose level 9B.