Related Experiment Videos
Cell surface glycosaminoglycans in normal and leukemic leukocytes
Cell Differentiation
|February 1, 1980
Summary
Normal white blood cells have surface glycosaminoglycans (GAGs), but acute myeloid leukemia cells lack them. This difference in GAGs, specifically chondroitin sulfate A, may impact how white blood cells move into circulation.
Area of Science:
- Biochemistry
- Cell Biology
- Hematology
Background:
- Glycosaminoglycans (GAGs) are crucial components of the extracellular matrix and cell surfaces.
- Alterations in cell surface GAGs are implicated in various disease states, including cancer.
- Leukocyte trafficking is a complex process influenced by cell surface molecules.
Purpose of the Study:
- To characterize the intracellular and extracellular glycosaminoglycans (GAGs) in peripheral leukocytes from normal and leukemic individuals.
- To investigate the role of cell surface GAGs in the peripheralization of polymorphonuclear leukocytes (PMN).
Main Methods:
- Electrophoresis was used to analyze GAGs.
- Enzyme sensitivity assays were employed to determine GAG composition.
- Comparative analysis included normal human leukocytes, acute myeloid leukemia cells, pig leukocytes, pig bone marrow cells, mesenchymal stem cells, and endothelial cells.
Main Results:
- Normal peripheral granulocytes (PMN) exhibit abundant trypsin-removable surface GAGs.
- Leukemic cells from acute myeloid leukemia patients lack these surface GAGs.
- Chondroitin sulfate A exposure on the cell surface appears to be significant for PMN peripheralization.
Conclusions:
- The presence or absence of specific cell surface GAGs, like chondroitin sulfate A, differentiates normal PMN from leukemic cells.
- Cell surface GAGs play a critical role in regulating leukocyte circulation and potentially in disease pathogenesis.