Sonoporation at low mechanical index - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bubble Science, Engineering & Technology Année : 2011

Sonoporation at low mechanical index

A. Delalande
S. Kotopoulis
  • Fonction : Auteur
T. Rovers
  • Fonction : Auteur
C. Pichon
M. Postema
  • Fonction : Auteur

Résumé

he purpose of this study was to investigate the physical mechanisms of sonoporation, in order to understand and improve ultrasound-assisted drug and gene delivery. Sonoporation is the transient permeabilisation and resealing of a cell membrane with the help of ultrasound and/or an ultrasound contrast agent, allowing for the trans-membrane delivery and cellular uptake of macromolecules between 10 kDa and 3 MDa. The authors studied the behaviour of ultrasound contrast agent microbubbles near cancer cells at low acoustic amplitudes. After administering an ultrasound contrast agent, HeLa cells were subjected to 6*6 MHz ultrasound with a mechanical index of 0*2 and observed with a high-speed camera. Microbubbles were seen to enter cells and rapidly dissolve. The quick dissolution after entering suggests that the microbubbles lose (part of) their shell while entering. The authors have demonstrated that lipid-shelled microbubbles can be forced to enter cells at a low mechanical index. Hence, if a therapeutic agent is added to the shell of the bubble or inside the bubble, ultrasound-guided delivery could be facilitated at diagnostic settings. In addition, these results may have implications for the safety regulations on the use of ultrasound contrast agents for diagnostic imaging.
Fichier non déposé

Dates et versions

hal-00608604 , version 1 (13-07-2011)

Identifiants

Citer

A. Delalande, S. Kotopoulis, T. Rovers, C. Pichon, M. Postema. Sonoporation at low mechanical index. Bubble Science, Engineering & Technology, 2011, 3 (1), pp.3-12. ⟨10.1179/1758897911Y.0000000001⟩. ⟨hal-00608604⟩
116 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More