Regulatory T cells and multiple myeloma.
Douglas E Joshua1, Ross D Brown, P Joy Ho
1Institute of Haematology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia. douglas.joshua@sswahs.nsw.gov.au
Clinical Lymphoma & Myeloma
|October 16, 2008
Summary
Regulatory T (Treg) cells
Area of Science:
- Immunology
- Oncology
- Hematology
Background:
- Clinical observations suggest active immune responses in myeloma patients, involving immune suppression and host attempts to control malignant B-cells.
- Host-tumor interactions in myeloma are dynamic, indicated by asymptomatic myeloma, disease stabilization, and prognostic significance of cytotoxic T cells.
Purpose of the Study:
- To review the potential importance and role of regulatory T (Treg) cells in multiple myeloma.
- To explore the complex host-tumor immune interactions characteristic of myeloma and the unclear role of Treg cells in this context.
Main Methods:
- Literature review discussing Treg cell function, their role in autoimmunity, and their debated involvement in malignancy.
- Analysis of existing research on Treg cell presence (increased/decreased) and function (functional/dysfunctional) in myeloma patients.
Main Results:
- Regulatory T (Treg) cells are crucial for controlling autoimmune phenomena, with FoxP3 deficiency leading to autoimmune disorders.
- The role of Treg cells in cancer immunity is debated; depletion can induce tumor rejection in models, and they act as tumor-infiltrating lymphocytes.
Conclusions:
- Myeloma exhibits complex host-tumor immune interactions, with some patients achieving long-term control, suggesting a tumor-host homeostasis.
- The specific role of Treg cells in maintaining this myeloma homeostasis remains unclear, with ongoing debate regarding their levels and functionality.
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