Surface modification and bioconjugation of anti-CD4 monoclonal antibody to magnetic nanoparticles as a highly efficient affinity adsorbent for positive selection of peripheral blood T CD4+ lymphocytes.

Magnetic activated cell sorting (MACS) is a straightforward and time-saving procedure for isolation of different healthy functional cells. The present study aimed for the developing of a new MACS-based platform for isolation of peripheral blood T CD4+ lymphocytes. For this goal, first: FeO magnetic nanoparticles (MNP) were prepared by co-precipitation of Fe (III) and Fe (II) ions and then coated by SiO shell, followed by the grafting of N-(phosphonomethyl) iminodiacetic acid (PMIDA) on the surface of fabricated MNP, FeO@SiO@PMIDA were formed. These MNP were further tested for their ability to bind CD4 T lymphocytes. Through conjugation of the anti-CD4 monoclonal antibody on the surface of FeO@SiO@PMIDA MNP. The newly developed immunomagnetic particles efficiently isolated T CD4+ lymphocytes from whole blood with high purity Therefore, our MNP afford an efficient tool for the cell separation process and further present the dramatic potential to be applied to other areas of biomedical application.