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GALECTIN-3 expression in differentiating human myeloid cells.
1Academic Surgery Department, ICSTM, 3rd floor, Chelsea and Westminster Hospital, 369 Fulham Rd, London, SW10 9NH, United Kingdom. n.lemarer@ic.ac.uk
Cell Biology International
|May 19, 2000
Summary
Galectin-3, a key protein in cell regulation, is expressed in human myeloid cells. It binds to early myeloid cells, enhancing their proliferation driven by granulocyte-colony stimulating factor (G-CSF).
Area of Science:
- Biochemistry
- Cell Biology
- Hematology
Background:
- Galectin-3 is a mammalian carbohydrate-binding protein involved in cell adhesion and proliferation.
- Progenitor cell proliferation in bone marrow relies on factors influencing cell adhesion.
Purpose of the Study:
- To investigate the developmental expression and function of galectin-3 in human myeloid cells.
- To determine the role of galectin-3 in early myeloid cell proliferation.
Main Methods:
- Western blotting using galectin-3 specific antibodies.
- Analysis of galectin-3 expression in different stages of myeloid cell development.
- In vitro proliferation assays with recombinant galectin-3 and granulocyte-colony stimulating factor (G-CSF).
Main Results:
- Galectin-3 (32 kD) is developmentally expressed in human myeloid cells, upregulated in mature cells.
- A distinct 70 kD galectin-3 protein is found exclusively in CD34+ early myeloid cells.
- Exogenous galectin-3 enhances G-CSF-driven proliferation of CD34+ early myeloid cells.
Conclusions:
- Galectin-3 plays a role in myeloid cell development and proliferation.
- The distinct forms of galectin-3 may have differential functions in myeloid cell maturation and expansion.