TY - JOUR
T1 - Measurements of liposome biomechanical properties by combining line optical tweezers and dielectrophoresis
AU - Spyratou, Ellas
AU - Cunaj, Efrosini
AU - Tsigaridas, George
AU - Mourelatou, Elena A.
AU - Demetzos, Costas
AU - Serafetinides, Alexander A.
AU - Makropoulou, Mersini
PY - 2015/7/3
Y1 - 2015/7/3
N2 - Liposomes are well-known cell simulators and are currently studied as drug delivery systems, for a targeted delivery of higher drug concentrations, in specific cells. Novel biophotonic techniques for manipulation and characterization of liposomes have been developed; among which are optical tweezers. In our work, we demonstrate a novel use of line optical tweezers to manipulate and cause liposome deformations. Optical forces induce tension on liposomes, which are stretched along the line optical trap. The method of dielectrophoresis, combined with optical tweezers, was used to measure the exerted optical forces. As a consequence, in the case of reversible liposome deformations, the value of the shear and bending moduli of liposomes was calculated. We anticipate that the selective manipulation of liposomes will help us toward a better understanding of the cellular-liposome interactions. Studying the biomechanical properties of liposomes will provide an insight into the mechanical behavior of individual living cells, which have recently been implicated in many aspects of human physiology and patho-physiology. The biomechanical properties of cells (i.e. deformability, stiffness and elasticity) can be useful biomarkers for various disease processes and changes of the cell state.
AB - Liposomes are well-known cell simulators and are currently studied as drug delivery systems, for a targeted delivery of higher drug concentrations, in specific cells. Novel biophotonic techniques for manipulation and characterization of liposomes have been developed; among which are optical tweezers. In our work, we demonstrate a novel use of line optical tweezers to manipulate and cause liposome deformations. Optical forces induce tension on liposomes, which are stretched along the line optical trap. The method of dielectrophoresis, combined with optical tweezers, was used to measure the exerted optical forces. As a consequence, in the case of reversible liposome deformations, the value of the shear and bending moduli of liposomes was calculated. We anticipate that the selective manipulation of liposomes will help us toward a better understanding of the cellular-liposome interactions. Studying the biomechanical properties of liposomes will provide an insight into the mechanical behavior of individual living cells, which have recently been implicated in many aspects of human physiology and patho-physiology. The biomechanical properties of cells (i.e. deformability, stiffness and elasticity) can be useful biomarkers for various disease processes and changes of the cell state.
KW - Biomechanical properties
KW - cell models
KW - line optical tweezers
KW - liposomes
UR - http://www.scopus.com/inward/record.url?scp=84939514304&partnerID=8YFLogxK
U2 - 10.3109/08982104.2014.987784
DO - 10.3109/08982104.2014.987784
M3 - Article
AN - SCOPUS:84939514304
SN - 0898-2104
VL - 25
SP - 202
EP - 210
JO - Journal of Liposome Research
JF - Journal of Liposome Research
IS - 3
ER -