A pre-clinical model combined cryopreservation technique with
precision-cut slice culture method to assess in vitro drug response of
hepatocellular carcinoma
Abstract
Background The aim of this study was to create a patient-derived slice
model by combining cryopreservation technique with precision-cut slice
culture method and explore its effectivity of predicting anti-cancer
drug sensitivity in vitro. Methods We prepared 0.3 mm thick tissue
slices by a microtome and maintain its cell viability by
cryopreservation technique. Slices were cultured individually in the
presence or absence of regorafenib (REG) for 72 hours. Alterations in
morphology and gene expression was assessed by histological and genetic
analysis. Overall viability was also analyzed in tissue slices by CCK-8
quantification assay and fluorescent staining. Tissue morphology and
cell viability could be evaluated to quantify drug effects. Results
Histological and genetic analysis showed that no significant alterations
in morphology and gene expression were induced by vitrification‑based
cryopreservation. The viability of warmed HCC tissues was up to 90% of
the fresh tissues. The viability and proliferation could be retained for
at least four days in filter culture system. The positive drug responses
in precision-cut slice culture in vitro were evaluated by tissue
morphology and cell viability. Conclusions In summary, the successful
application of precision-cut HCC slice culture combining
cryopreservation technique in a systematic drug screen demonstrates the
feasibility and utility of slice culture method for drug response.