self-transplant of her2+targeting T lymphocytes clears micrometastasis

[Lani]

Cancer Immunol Immunother. 2007 Jul 24; [Epub ahead of print] Links
Adoptive transfer of autologous, HER2-specific, cytotoxic T lymphocytes for the treatment of HER2-overexpressing breast cancer.

Bernhard H, Neudorfer J, Gebhard K, Conrad H, Hermann C, Nährig J, Fend F, Weber W, Busch DH, Peschel C.
Department of Hematology/Oncology, Technical University of Munich, Klinikum rechts der Isar, 81675, Munich, Germany.
The human epidermal growth factor receptor 2 (HER2) has been targeted as a breast cancer-associated antigen by immunotherapeutical approaches based on HER2-directed monoclonal antibodies and cancer vaccines. We describe the adoptive transfer of autologous HER2-specific T-lymphocyte clones to a patient with metastatic HER2-overexpressing breast cancer. The HLA/multimer-based monitoring of the transferred T lymphocytes revealed that the T cells rapidly disappeared from the peripheral blood. The imaging studies indicated that the T cells accumulated in the bone marrow (BM) and migrated to the liver, but were unable to penetrate into the solid metastases. The disseminated tumor cells in the BM disappeared after the completion of adoptive T-cell therapy. This study suggests the therapeutic potential for HER2-specific T cells for eliminating disseminated HER2-positive tumor cells and proposes the combination of T cell-based therapies with strategies targeting the tumor stroma to improve T-cell infiltration into solid tumors.
PMID: 17646988 [PubMed - as supplied by publisher]

[Joy]

I just love your posts and am so grateful for the time and effort you put into this-you are a gem!