PHA-L lectin and carbohydrate relationship: conjugation with CdSe/CdS nanoparticles, radiolabeling and in vitro affinities on MCF-7 cells

KARA A., ÜNAK P. , SELÇUKİ C. , AKCA O., MEDİNE E. İ. , Sakarya S.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, cilt.299, ss.807-813, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 299 Konu: 1
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1007/s10967-013-2783-5
  • Sayfa Sayıları: ss.807-813


This research aims to investigate the interaction between phytohemagglutinin-L (PHA-L) and sialic acid, which is abundant on the breast cancer cell (MCF-7) surface and displays monosaccharide characteristics, by experimental and computational methods. Experimentally, CdSe/CdS nanoparticles (QDs) were synthesized; PHA-L was conjugated with QDs and labeled with I-125. Radiolabeling yield was found to be 97 +/- A 1.2 %. Afterwards, in vitro bioaffinities of radiolabeled PHA-L conjugated QDs have been investigated on MCF-7 cells and it has been observed that the cell incorporation increased with time. The results indicated that I-125 labeled QD-PHA-L conjugates represent significant affinity on MCF-7 cells. In the second step of the study, the crystal structure of carbohydrate interaction surface of PHA-L was extracted from the crystal structure of PHA-L. The interactions between this surface and sialic acid were calculated by computational tools. These calculations revealed specific interactions between PHA-L and sialic acid. Semi-empirical methods, PM3 and AM1, were used in these calculations. Significant outcomes have been obtained from the experimental and computational studies and these results demonstrated that PHA-L may be an effective agent for imagining MCF-7 cells.