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Tumor necrosis factor as marker for monocyte function in chronic myeloid leukemia
V S Chitnis1, P M Parikh, J S Nadkarni
1Division of Laboratory Medicine, Tata Memorial Hospital, Bombay, India.
Cancer Investigation
|January 1, 1996
Summary
Monocytes in chronic myeloid leukemia (CML) patients retain their function, secreting tumor necrosis factor. This indicates that lipopolysaccharide (LPS) stimulation uses different pathways than the leukemia itself.
Area of Science:
- Immunology
- Hematology
- Oncology
Background:
- Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm characterized by the Philadelphia chromosome.
- Monocyte dysfunction can occur in various hematological malignancies, impacting immune responses.
- Tumor necrosis factor (TNF) is a key cytokine involved in inflammation and immune regulation.
Purpose of the Study:
- To evaluate the functional intactness of monocytes in CML patients.
- To assess the ability of CML monocytes to secrete tumor necrosis factor (TNF).
- To investigate the response of CML monocytes to lipopolysaccharide (LPS) stimulation.
Main Methods:
- Monocytes were isolated from peripheral blood of CML patients.
- Monocyte function was assessed by measuring their capacity to secrete TNF.
- Cells were stimulated with lipopolysaccharide (LPS) to evaluate their response.
Main Results:
- Monocytes from CML patients demonstrated intact TNF secretion.
- These monocytes responded to LPS stimulation, even during refractory periods of the disease.
- The findings suggest distinct signaling pathways for LPS-induced stimulation versus malignant processes in CML.
Conclusions:
- Monocyte function, specifically TNF secretion, remains largely intact in CML patients.
- LPS stimulation activates monocytes in CML patients through pathways independent of the underlying malignant process.
- This preserved monocyte function may have implications for immune responses and therapeutic strategies in CML.