Related Experiment Video
Updated: Mar 17, 2026
06:38
Macrophage Differentiation and Polarization into an M2-Like Phenotype using a Human Monocyte-Like THP-1 Leukemia Cell Line
Published on: August 2, 2021
32.3K
Monocytes/Macrophages Stimulate Hairy-Cell Proliferation
1a University Department of Haematology, Royal Liverpool Hospital, Liverpool, England, UK.
Leukemia & Lymphoma
|July 29, 2016
Summary
Monocytes stimulate hairy cell leukaemia (HCL) cell proliferation, independent of growth factors. This monocyte-dependent proliferation, crucial in vivo, is inhibited by alpha interferon.
Area of Science:
- Oncology
- Immunology
- Hematology
Background:
- Hairy cell leukaemia (HCL) is a rare B-cell malignancy.
- The role of microenvironmental factors in HCL pathogenesis is not fully understood.
Purpose of the Study:
- To investigate the factors driving hairy cell (HC) proliferation in HCL.
- To explore the potential role of monocytes/macrophages in HC growth.
Main Methods:
- Double staining immunofluorescence using Ki-67 and surface/cytoplasmic antigens.
- Co-culture experiments with autologous and allogeneic monocytes/macrophages.
- Assessment of proliferation in response to supernatants and TNF-α.
- Evaluation of alpha interferon (α-IFN) effects.
Main Results:
- Spontaneous HC proliferation observed in one patient, dependent on autologous monocytes.
- Allogeneic monocytes/macrophages stimulated HC proliferation in 75% of tested HCL cases.
- Proliferation required monocyte viability and cell contact, and was inhibited by α-IFN.
- Tumor necrosis factor-alpha (TNF-α) and culture supernatants did not induce proliferation.
Conclusions:
- Monocytes/macrophages play a significant role in driving HC proliferation in HCL.
- Cell contact and monocyte viability are essential for this interaction.
- These findings suggest in vivo pathophysiological relevance, particularly in the bone marrow microenvironment.
- Alpha interferon (α-IFN) demonstrates inhibitory potential.
