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Guo Z, Meng Y, Zhou S, Li J, Li X, Feng R, Zou Y, Liao W, Wu W, Xu M, Zeng X, Zhao W, Zhong H. Atomic force microscopy correlates mechanical and electrical properties of HepG2 cells with curcumin concentration. J Pharm Biomed Anal 2024; 243:116107. [PMID: 38489959 DOI: 10.1016/j.jpba.2024.116107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/06/2024] [Accepted: 03/12/2024] [Indexed: 03/17/2024]
Abstract
Hepatocellular carcinoma (HCC) is a highly prevalent cancer with a significant impact on human health. Curcumin, a natural compound, induces cytoskeletal changes in liver cancer cells and modifies the distribution of lipids, proteins, and polysaccharides on plasma membranes, affecting their mechanical and electrical properties. In this study, we used nanomechanical indentation techniques and Kelvin probe force microscopy (KPFM) based on atomic force microscopy (AFM) to investigate the changes in surface nanomechanical and electrical properties of nuclear and cytoplasmic regions of HepG2 cells in response to increasing curcumin concentrations. CCK-8 assays and flow cytometry results demonstrated time- and concentration-dependent inhibition of HepG2 cell proliferation by curcumin. Increasing curcumin concentration led to an initial increase and then decrease in the mechanical properties of nuclear and cytoplasmic regions of HepG2 cells, represented by the Young's modulus (E), as observed through nanoindentation. KPFM measurements indicated decreasing trends in both cell surface potential and height. Fluorescence microscopy results indicated a positive correlation between curcumin concentration and phosphatidylserine translocation from the inner to the outer membrane, which influenced the electrical properties of HepG2 cells. This study provides valuable insights into curcumin's mechanisms against cancer cells and aids nanoscale evaluation of therapeutic efficacy and drug screening.
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Affiliation(s)
- Zeling Guo
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Yu Meng
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Shang Zhou
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Jiangting Li
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Xinyu Li
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Rongrong Feng
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Yulan Zou
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Wenchao Liao
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Weiting Wu
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Mingjing Xu
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Xiangfu Zeng
- The First Affiliated Hospital of Gannan Medical University, Ganzhou 341000, People's Republic of China.
| | - Weidong Zhao
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China.
| | - Haijian Zhong
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, People's Republic of China; School of Medical Information Engineering, Gannan Medical University, Ganzhou 341000, People's Republic of China; Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases, Ministry of Education, Gannan Medical University, Ganzhou 341000, People's Republic of China.
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Zou J, Peng B, Fan N, Liu Y. Simulation and experimental study on the influence of lamina on nanoneedle penetration into the cell nucleus. Biomech Model Mechanobiol 2024:10.1007/s10237-024-01836-4. [PMID: 38526703 DOI: 10.1007/s10237-024-01836-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 02/21/2024] [Indexed: 03/27/2024]
Abstract
We have developed a finite element model to simulate the penetration of nanoneedles into the cellular nucleus. It is found that the nuclear lamina, the primary supporting structure of the nuclear membrane, plays a crucial role in maintaining the integrity of the nuclear envelope and enhancing stress concentration in the nuclear membrane. Notably, nuclear lamina A exhibits a more pronounced effect compared to nuclear lamina B. Subsequently, we further conducted experiments by controlling the time of osteopontin (OPN) treatment to modify the nuclear lamina density, and the results showed that an increase in nuclear lamina density enhances the probability of nanoneedle penetration into the nuclear membrane. Through employing both simulation and experimental techniques, we have gathered compelling evidence indicating that an augmented density of nuclear lamina A can enhance the penetration of nanoneedles into the nuclear membrane.
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Affiliation(s)
- Jie Zou
- School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Bei Peng
- School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Na Fan
- School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China.
| | - Yang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
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Markova O, Clanet C, Husson J. Quantifying both viscoelasticity and surface tension: Why sharp tips overestimate cell stiffness. Biophys J 2024; 123:210-220. [PMID: 38087780 PMCID: PMC10808041 DOI: 10.1016/j.bpj.2023.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 09/10/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023] Open
Abstract
Quantifying the mechanical properties of cells is important to better understand how mechanics constrain cellular processes. Furthermore, because pathologies are usually paralleled by altered cell mechanical properties, mechanical parameters can be used as a novel way to characterize the pathological state of cells. Key features used in models are cell tension, cell viscoelasticity (representing the average of the cell bulk), or a combination of both. It is unclear which of these features is the most relevant or whether both should be included. To clarify this, we performed microindentation experiments on cells with microindenters of various tip radii, including micrometer-sized microneedles. We obtained different cell-indenter contact radii and measured the corresponding contact stiffness. We derived a model predicting that this contact stiffness should be an affine function of the contact radius and that, at vanishing contact radius, the cell stiffness should be equal to the cell tension multiplied by a constant. When microindenting leukocytes and both adherent and trypsinized adherent cells, the contact stiffness was indeed an affine function of the contact radius. For leukocytes, the deduced surface tension was consistent with that measured using micropipette aspiration. For detached endothelial cells, agreement between microindentation and micropipette aspiration was better when considering these as only viscoelastic when analyzing micropipette aspiration experiments. This work suggests that indenting cells with sharp tips but neglecting the presence of surface tension leads to an effective elastic modulus whose origin is in fact surface tension. Accordingly, using sharp tips when microindenting a cell is a good way to directly measure its surface tension without the need to let the viscoelastic modulus relax.
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Affiliation(s)
- Olga Markova
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
| | - Christophe Clanet
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
| | - Julien Husson
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, École Polytechnique, Institut Polytechnique de Paris, Palaiseau, France.
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