title: [Binding of targeted microbubble contrast agent to choriocarcinoma cells in vitro].
abstract: OBJECTIVE
  To observe the cell binding characteristics of SonoVue microbubbles targeting choriocarcinoma cells and provide evidence for clinical ultrasonic localization of the tumor utilizing the microbubbles.
  
  
  METHODS
  The targeted microbubbles were prepared by conjugating anti-HCG antibody with the SonoVue microbubbles and added in choriocarcinoma cells or endometrial stromal cells to compare the cell binding rate of the agents under optical microscope and with flow cytometry.
  
  
  RESULTS
  Flow cytometry demonstrated a binding rate of 77.6% between the SonoVue microbubbles and anti-HCG antibody. Light microscopy showed that the total rosette formation rate of the choriocarcinoma cells exposed to the targeted microbubble bearing anti-HCG antibody reached (87.8-/+6.3)%, significantly higher than that of the endometrial stromal cells [(9.4-/+1.7)%, P<0.05]. The binding rate of the targeted microbubbles with the choriocarcinoma cells before and after PBS washing were (85.4-/+4.7)% and (83.1-/+3.8)% (P>0.05), respectively, suggesting strong stability of the binding. The binding rate was 81.0% according to the results of flow cytometry.
  
  
  CONCLUSIONS
  The targeted microbubbles as a contrast agent can efficiently bind to the choriocarcinoma cells in vitro with a stability sufficient to resist the blood flow.
authors.affiliation: Department of Gynecology and Obstetrics, Second Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510120, China.
authors.forename: Li-xue
authors.initials: LX
authors.lastname: Zhou
authors.forename: Jun
authors.initials: J
authors.lastname: Zhu
authors.forename: Hong
authors.initials: H
authors.lastname: Ding
authors.forename: Cai-xia
authors.initials: CX
authors.lastname: Jia
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Qing
authors.initials: Q
authors.lastname: Wei
mesh_terms: D002822:Choriocarcinoma / Q000473:pathology*; D003287:Contrast Media / Q000378:metabolism*; D005260:Female; D006801:Humans; D045423:Microbubbles; D010743:Phospholipids / Q000378:metabolism*; D011247:Pregnancy; D013459:Sulfur Hexafluoride / Q000378:metabolism*; D014594:Uterine Neoplasms / Q000378:metabolism
chemical_list: D003287:Contrast Media; D010743:Phospholipids; C420843:contrast agent BR1; D013459:Sulfur Hexafluoride