Cell deformation and acquired drug resistance: elucidating the major influence of drug-nanocarrier delivery systems

J Mater Chem B. 2020 Mar 4;8(9):1852-1862. doi: 10.1039/c9tb02744k.

Abstract

Cancer diagnosis and its stage-wise assessment are determined through invasive solid tissue biopsies. Conversely, cancer imaging is enriched through emission tomography and longitudinal high-resolution analysis for the early detection of cancer through altered cell morphology and cell-deformation. Similarly, in post multiple chemo-cycle exposures, the tumor regression and progression thereafter are not well understood. Here, we report chemo-cycles of doxorubicin (Dox) carrying nanoparticles (NPs) to be highly indicative of cell deformation and a progressive indicator of phenotypic expressions of acquired drug resistance (ADR). We designed graphene (G) based nanocarriers by chemically conjugating multiple components: (i) G; (ii) iron oxide (Fe3O4) NPs; and (iii) Dox through a cysteine (Cys) linker (G-Dox and G-Cys-Fe3O4-Dox). Although Dox underwent cell diffusion, the G-based nanocarriers followed a receptor-mediated endocytosis which created a profound impact on the cell membrane integrity. ADR owing to Dox and G-based nanocarriers was analyzed through a cytotoxicity assay, cell morphology deformation parameters and cellular uptake kinetic patterns. Interestingly, after the third chemo-cycle, G-Dox incubated cells showed the greatest decrease in the alteration of the nuclear surface area (NSA) of ∼28%, a ∼40% reduction of the cell surface area (CSA) and a ∼32% increase in the cell roundness (CRd). Our results suggested that the G-based nanocarriers induced the cell deformation process, subsequently resulting in ADR. Although the G-based nanocarriers initiated ADR, G-Dox was most cytotoxic to cancer cells and induced the maximum cell morphology deformation within our scope of study. This outcome implies caution is needed when using G-based nanocarriers and other multi-component nanosystems for Dox delivery as they lead to possible phenotypic expressions of drug resistance in cancer cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antibiotics, Antineoplastic / chemistry
  • Antibiotics, Antineoplastic / pharmacology*
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • Doxorubicin / chemistry
  • Doxorubicin / pharmacology*
  • Drug Carriers / chemistry
  • Drug Delivery Systems*
  • Drug Resistance, Neoplasm / drug effects
  • Graphite / chemistry*
  • HeLa Cells
  • Humans
  • Nanoparticles / chemistry*
  • Particle Size
  • Surface Properties

Substances

  • Antibiotics, Antineoplastic
  • Drug Carriers
  • Graphite
  • Doxorubicin