title: Affibody-displaying bionanocapsules for specific drug delivery to HER2-expressing cancer cells.
abstract: A novel HER2-targeted carrier was developed using bionanocapsules (BNCs). Bionanocapsules (BNCs) are 100-nm hollow nanoparticles composed of the L-protein of hepatitis B virus surface antigen. An affibody of HER2 was genetically displayed on the BNC surface (Z(HER2)-BNC). For the investigation of binding affinity, Z(HER2)-BNC was incubated with the cancer cell lines SK-BR-3 (HER2 positive), and MDA-MB-231 (HER2 negative). For analysis of HER2 targeting specificity, Z(HER2)-BNC or Z(WT)-BNC (without affibody) was incubated with both SK-BR-3 and MDA-MB-231 cells by time lapse and concentration. For the delivery of encapsulated molecules (calcein), fluorescence of Z(HER2)-BNC mixed with liposomes was also compared with that of Z(WT)-BNC and nude liposomes by incubation with SK-BR-3 cells. As a result, Z(HER2)-BNC-liposome complex demonstrated the delivery to HER2-expressing cells (SK-BR-3) with a high degree of specificity. This indicates that genetically engineered BNCs are promising carrier for cancer treatment.
authors.affiliation: Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Shishido
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Mieda
authors.forename: Sang Youn
authors.initials: SY
authors.lastname: Hwang
authors.forename: Yuya
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Tanaka
authors.forename: Chiaki
authors.initials: C
authors.lastname: Ogino
authors.forename: Hideki
authors.initials: H
authors.lastname: Fukuda
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kondo
mesh_terms: D001943:Breast Neoplasms / Q000188:drug therapy; D045744:Cell Line, Tumor; D004337:Drug Carriers / Q000737:chemistry; D005260:Female; D005452:Fluoresceins / Q000737:chemistry; D006511:Hepatitis B Antigens / Q000235:genetics / Q000378:metabolism; D006801:Humans; D053758:Nanoparticles / Q000008:administration & dosage*; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000008:administration & dosage* / Q000235:genetics / Q000378:metabolism
chemical_list: D004337:Drug Carriers; D005452:Fluoresceins; D006511:Hepatitis B Antigens; D018719:Erb-b2 Receptor Tyrosine Kinases; D011993:Recombinant Fusion Proteins; C533351:affibody (ZHER2-342)2; C007740:fluorexon