Mini Allo Stem Cell Transplantation for the Treatment of Solid Tumors

2014-08-27 03:18:34 | BioPortfolio


A major focus of recent research has been the development of effective ways of sensitizing the patient's immune system to recognize the cancer as foreign. Allogeneic stem cell transplantation represents a novel way of potentially achieving this goal. There is recent evidence that non-myeloablative allogeneic stem cell transplantation provides effective therapy for patients with metastatic renal cell carcinoma. Based on the preliminary reports from other investigators treating patient with breast and ovarian cancer, the investigators of this study would propose treating an expanded cohort of patients with any metastatic solid tumor.

The principal endpoints of the trial will include incidence of durable engraftment, quality of hematopoietic and immune reconstitution, extent of donor chimerism, incidence and severity of acute and chronic graft versus host disease (GVHD), and incidence of long-term disease free survival (DFS). The investigators will evaluate the tumor response of patients with stable or progressive disease post-transplant to donor lymphocyte infusions (DLI). The investigators will also study the effects of DLI on T-cell immunity in the recipients.


The trial is a pilot study in which patients with metastatic solid tumors will undergo non-myeloablative allogeneic hematopoietic stem cell transplantation. Patients whose immunosuppressive therapy has been tapered off, are without GVHD, and have evidence of residual or progressive disease will undergo DLI.

In recent years there have been attempts to harness the graft-versus-tumor effect of allogeneic bone marrow transplant to treat patients with metastatic solid tumors. Researchers at the NIH recently reported on 19 patients with refractory metastatic renal-cell carcinoma who had suitable donors and received a preparative regimen of cyclophosphamide and fludarabine followed by an infusion of a peripheral-blood stem-cell allograft from an HLA-identical sibling or a sibling with a mismatch of a single HLA antigen.49 They note that at the time of the last follow-up, 9 of the 19 patients were alive 287 to 831 days after transplantation (median follow-up: 402 days). Two had died of transplantation-related causes and 8 of progressive disease. In 10 patients (53%) metastatic disease regressed: 3 had a complete response, and 7 had a partial response. The patients who had a complete response remained in remission 27, 25, and 16 months after transplantation. Regression of metastases was delayed, occurring a median of 129 days after transplantation, and often followed the withdrawal of cyclosporine and the establishment of complete donor T-cell chimerism. They concluded that these results were consistent with a graft-versus-tumor effect and that non-myeloablative allogeneic stem cell transplantation can induce sustained regression of metastatic RCCA in patients who have had no response to conventional immunotherapy.

Study Design

Allocation: Non-Randomized, Control: Uncontrolled, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Metastatic Solid Tumor


nonmyeloablative stem cell transplant


Beth Israel Deaconess Medical Center
United States


Active, not recruiting


Beth Israel Deaconess Medical Center

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:18:34-0400

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Medical and Biotech [MESH] Definitions

A cytologic technique for measuring the functional capacity of tumor stem cells by assaying their activity. It is used primarily for the in vitro testing of antineoplastic agents.

Mucocellular carcinoma of the ovary, usually metastatic from the gastrointestinal tract, characterized by areas of mucoid degeneration and the presence of signet-ring-like cells. It accounts for 30%-40% of metastatic cancers to the ovaries and possibly 1%-2% of all malignant ovarian tumors. The lesions may not be discovered until the primary disease is advanced, and most patients die of their disease within a year. In some cases, a primary tumor is not found. (From Dorland, 27th ed; Holland et al., Cancer Medicine, 3d ed, p1685)

Methods of implanting a CELL NUCLEUS from a donor cell into an enucleated acceptor cell. Often the nucleus of a somatic cell is transferred into a recipient OVUM or stem cell (STEM CELLS) with the nucleus removed. This technology may provide means to generate autologous diploid pluripotent cell for therapeutic cloning, and a model for studying NUCLEAR REPROGRAMMING in embryonic stem cells. Nuclear transfer was first accomplished with frog eggs (RANA PIPIENS) and reported in 1952.

Benign and malignant intra-axial tumors of the MESENCEPHALON; PONS; or MEDULLA OBLONGATA of the BRAIN STEM. Primary and metastatic neoplasms may occur in this location. Clinical features include ATAXIA, cranial neuropathies (see CRANIAL NERVE DISEASES), NAUSEA, hemiparesis (see HEMIPLEGIA), and quadriparesis. Primary brain stem neoplasms are more frequent in children. Histologic subtypes include GLIOMA; HEMANGIOBLASTOMA; GANGLIOGLIOMA; and EPENDYMOMA.

The release of stem cells from the bone marrow into the peripheral blood circulation for the purpose of leukapheresis, prior to stem cell transplantation. Hematopoietic growth factors or chemotherapeutic agents often are used to stimulate the mobilization.

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