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Isolation and Characterization of Tumor-initiating Cells from Sarcoma Patient-derived Xenografts
Published on: June 13, 2019
Killing tumor cells through their surface beta(2)-microglobulin or major histocompatibility complex class I molecules
1Department of Lymphoma and Myeloma, Division of Cancer Medicine, Center for Cancer Immunology Research, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA.
Cancer
|February 10, 2010
Summary
Antibodies targeting beta(2)-microglobulin (beta(2)M) or major histocompatibility complex (MHC) class I induce tumor cell apoptosis. This targeted therapy shows promise for malignancies, sparing normal cells.
Area of Science:
- Immunology
- Oncology
- Molecular Biology
Background:
- Targeted antibody therapy is effective for cancer treatment.
- Beta(2)-microglobulin (beta(2)M) and MHC class I molecules are expressed on tumor cells.
Purpose of the Study:
- To investigate the therapeutic potential of antibodies targeting beta(2)M or MHC class I.
- To elucidate the mechanisms of antibody-induced tumor cell apoptosis.
Main Methods:
- In vitro and in vivo studies using monoclonal antibodies against beta(2)M or MHC class I.
- Analysis of signaling pathways including LYN kinase, PLC-gamma2, JNK, PI3K/Akt, and ERK.
- Assessment of mitochondrial integrity and caspase activation.
Main Results:
- Antibodies against beta(2)M/MHC class I induced apoptosis in tumor cells.
- Apoptosis was mediated by LYN kinase and JNK pathway activation, and inhibition of PI3K/Akt and ERK pathways.
- Mitochondrial integrity was compromised, activating caspase-9.
- Therapeutic antibodies demonstrated selectivity for tumor cells, sparing normal hematopoietic cells.
Conclusions:
- Targeting beta(2)M or MHC class I with antibodies is a potential therapeutic strategy for expressing malignancies.
- This approach offers a selective method for inducing tumor cell apoptosis with minimal damage to normal cells.
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