Use of atomic force microscopy to assess the biomechanical properties of 3D tumor cell models

Abstract

Multicellular spheroids are a unique object model for toxicological studies. Cells in a three-dimensional (3D) cluster contain a microenvironment and intercellular communication, which allows spheroids to be used as a more realistic model than traditional cell cultures. Tumor microregions consist of heterogeneous populations of cancer cells, in which cell growth and response to antitumor drugs depend on their 3D architecture, intercellular contacts, and interaction with the microenvironment. Tumor growth and progression are also strongly influenced by mechanical cues. Currently, 3D cell culture models are powerful tools for studying the toxicity of drug compounds and nanomaterials of different compositions and morphologies.

This review presents data on the use of various techniques, particularly atomic force microscopy, to investigate changes in the mechanical properties of cells in spheroids. Specifically, the use of atomic force microscopy as a tool to reveal physicochemical parameters of cells during pathophysiological processes or drug exposure is considered. The relevance of this review is attributed to the increasing interest in the role of biomechanical properties of tissues, cells, and subcellular structures as markers of pathophysiological conditions.

Keywords

spheroids / atomic force microscopy / nanomechanical properties / nanotoxicology / cancer cells

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