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2016 ; 6
(ä): 32985
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Computational imaging reveals mitochondrial morphology as a biomarker of cancer
phenotype and drug response
#MMPMID27609668
Giedt RJ
; Fumene Feruglio P
; Pathania D
; Yang KS
; Kilcoyne A
; Vinegoni C
; Mitchison TJ
; Weissleder R
Sci Rep
2016[Sep]; 6
(ä): 32985
PMID27609668
show ga
Mitochondria, which are essential organelles in resting and replicating cells,
can vary in number, mass and shape. Past research has primarily focused on
short-term molecular mechanisms underlying fission/fusion. Less is known about
longer-term mitochondrial behavior such as the overall makeup of cell
populations' morphological patterns and whether these patterns can be used as
biomarkers of drug response in human cells. We developed an image-based
analytical technique to phenotype mitochondrial morphology in different cancers,
including cancer cell lines and patient-derived cancer cells. We demonstrate that
(i) cancer cells of different origins, including patient-derived xenografts,
express highly diverse mitochondrial phenotypes; (ii) a given phenotype is
characteristic of a cell population and fairly constant over time; (iii)
mitochondrial patterns correlate with cell metabolic measurements and (iv)
therapeutic interventions can alter mitochondrial phenotypes in drug-sensitive
cancers as measured in pre- versus post-treatment fine needle aspirates in mice.
These observations shed light on the role of mitochondrial dynamics in the
biology and drug response of cancer cells. On the basis of these findings, we
propose that image-based mitochondrial phenotyping can provide biomarkers for
assessing cancer phenotype and drug response.