[The ultrastructure study of membrane surface of the bone marrow CD34+ cells with the atomic force microscope]

Area of Science:

• Hematology
• Biophysics
• Cell Biology

Context:

• Human CD34(+) cells are crucial hematopoietic stem/progenitor cells (HSPC) for reconstituting hematopoiesis and immune functions.
• These cells are increasingly used in treating genetic and neoplastic disorders.
• Understanding their surface ultrastructure is key for diagnostic and therapeutic applications.

Purpose:

• To investigate and compare the membrane surface ultrastructures of bone marrow CD34(+) cells from normal individuals and leukemia patients.
• To evaluate the utility of Atomic Force Microscopy (AFM) in distinguishing these cell populations.

Summary:

• Bone marrow CD34(+) cells were collected from normal donors and leukemia patients.
• Atomic Force Microscopy (AFM) was employed to analyze the nanometer-level surface morphology of purified CD34(+) cells.
• Quantitative analysis revealed significantly higher surface roughness parameters in CD34(+) HSPC from leukemia patients compared to normal controls.

Impact:

• AFM provides detailed insights into cell membrane nanostructure, surpassing conventional methods.
• The identified morphologic differences suggest AFM can serve as a valuable tool for rapid leukemia diagnosis.
• This technique aids in the selection of CD34(+) hematopoietic cells for therapeutic purposes.