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2016 ; 6
(ä): 26692
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Characterizing the malignancy and drug resistance of cancer cells from their
membrane resealing response
#MMPMID27225309
Hui TH
; Zhou ZL
; Fong HW
; Ngan RK
; Lee TY
; Au JS
; Ngan AH
; Yip TT
; Lin Y
Sci Rep
2016[May]; 6
(ä): 26692
PMID27225309
show ga
In this report, we showed that two tumor cell characteristics, namely the
malignancy and drug-resistance status can be evaluated by their membrane
resealing response. Specifically, membrane pores in a number of pairs of cancer
and normal cell lines originated from nasopharynx, lung and intestine were
introduced by nano-mechanical puncturing. Interestingly, such nanometer-sized
holes in tumor cells can reseal ~2-3 times faster than those in the corresponding
normal cells. Furthermore, the membrane resealing time in cancer cell lines
exhibiting resistance to several leading chemotherapeutic drugs was also found to
be substantially shorter than that in their drug-sensitive counterparts,
demonstrating the potential of using this quantity as a novel marker for future
cancer diagnosis and drug resistance detection. Finally, a simple model was
proposed to explain the observed resealing dynamics of cells which suggested that
the distinct response exhibited by normal, tumor and drug resistant cells is
likely due to the different tension levels in their lipid membranes, a conclusion
that is also supported by direct cortical tension measurement.