Poly(Acrolein-co-β-Cyclodextrin) Functionalized Magnetic Nanoparticles for Selective CD45-Positive Cells Capturing

Area of Science:

• Biomaterials Science
• Nanotechnology
• Immunology

Background:

• Efficient isolation of specific cell populations is crucial for diagnostics and research.
• Magnetic nanoparticles offer advantages for cell separation due to their superparamagnetic properties.
• Functionalizing nanoparticles with specific antibodies enhances target cell capture selectivity.

Purpose of the Study:

• To develop a magnetic nanocomposite for the specific isolation of CD45 positive cells.
• To functionalize Fe₃O₄ magnetic nanoparticles with polyacrolein-β-cyclodextrin and anti-CD45 antibodies.
• To characterize the nanocomposite and evaluate its efficiency in capturing CD45+ cells.

Main Methods:

• Surface-initiated radical polymerization of acrolein and acrylated β-cyclodextrin on Fe₃O₄ magnetic nanoparticles.
• Immobilization of fluorescein-conjugated IgG anti-human CD45 onto the functionalized nanoparticles.
• Characterization using XRD, VSM, FT-IR, H-NMR, TGA, SEM, TEM, and flow cytometry.
• Evaluation of selective cell capture using peripheral blood mononuclear cells (PBMCs).

Main Results:

• Successful synthesis of Fe₃O₄@PACD nanocomposite with immobilized anti-CD45 antibodies.
• Comprehensive characterization confirmed successful antibody conjugation via cyclodextrin encapsulation and Schiff base formation.
• Demonstrated selective capture of CD45+ cells from PBMCs using the fabricated nanocomposite.
• TEM and fluorescence microscopy confirmed efficient cell capturing capabilities.

Conclusions:

• The developed Fe₃O₄@PACD-Ab nanocomposite is effective for the selective isolation of CD45 positive cells.
• The combination of magnetic nanoparticles, cyclodextrin, and specific antibodies provides a robust platform for cell separation.
• This approach holds promise for applications in cell-based diagnostics and immunotherapy research.