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Mechanical properties of human kidney cells and their effects on the atomic force microscope beam vibrations

In the present investigation, the mechanical properties of normal and carcinomatous cells of kidney tissue (HEK‐293, ACHN, respectively) were investigated using atomic force microscopy (AFM). Initially, the elastic modulus of… Click to show full abstract

In the present investigation, the mechanical properties of normal and carcinomatous cells of kidney tissue (HEK‐293, ACHN, respectively) were investigated using atomic force microscopy (AFM). Initially, the elastic modulus of ACHN cells was measured following chemotherapy with the anti‐cancer drug Cisplatin and plasma treatment. The MTT assay was employed to ascertain the most effective dosages for incubation periods of 12, 24, 48, 72, and 96 h, guided by the IC50 concentration for cell viability during chemotherapy treatment. Analysis at these specified time points revealed a progressive increase in the elastic modulus of ACHN cells when subjected to Cisplatin‐based chemotherapy. Specifically, the elastic modulus increased by 1.847, 4.416, 6.035, 8.029, and 9.727 times in comparison to untreated cells at 12, 24, 48, 72, and 96 h, respectively. ACHN cells were subsequently treated with plasma for 30 and 60 s for 24 and 48‐h incubation periods. The plasma treatment increased the ACHN cell's elastic modulus. In the subsequent phase of the research, a combination of theoretical (finite element method [FEM]) and experimental methodologies was employed to investigate the resonant frequencies and magnitude of the frequency response function (FRF) concerning the movement of the AFM cantilever. This examination was conducted using ACHN cells as specimens, both before and after exposure to chemotherapy and plasma treatments. The results showed that higher sample elastic modulus increased the resonant frequency, indicating that treated cells had a higher resonant frequency than untreated cells. In conclusion, the FEM and experimental results were compared and found to be in good agreement.

Keywords: mechanical properties; elastic modulus; atomic force; chemotherapy; achn cells

Journal Title: Microscopy Research and Technique
Year Published: 2024

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