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Buckley M, Kramer M, Johnson B, Huskin G, Berry J, Sewell-Loftin MK. Mechanical activation and expression of HSP27 in epithelial ovarian cancer. Sci Rep 2024; 14:2856. [PMID: 38310132 PMCID: PMC10838328 DOI: 10.1038/s41598-024-52992-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 01/25/2024] [Indexed: 02/05/2024] Open
Abstract
Understanding the complex biomechanical tumor microenvironment (TME) is of critical importance in developing the next generation of anti-cancer treatment strategies. This is especially true in epithelial ovarian cancer (EOC), the deadliest of the gynecologic cancers due to recurrent disease or chemoresistance. However, current models of EOC progression provide little control or ability to monitor how changes in biomechanical parameters alter EOC cell behaviors. In this study, we present a microfluidic device designed to permit biomechanical investigations of the ovarian TME. Using this microtissue system, we describe how biomechanical stimulation in the form of tensile strains upregulate phosphorylation of HSP27, a heat shock protein implicated in ovarian cancer chemoresistance. Furthermore, EOC cells treated with strain demonstrate decreased response to paclitaxel in the in vitro vascularized TME model. The results provide a direct link to biomechanical regulation of HSP27 as a mediator of EOC chemoresistance, possibly explaining the failure of such therapies in some patients. The work presented here lays a foundation to elucidating mechanobiological regulation of EOC progression, including chemoresistance and could provide novel targets for anti-cancer therapeutics.
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Affiliation(s)
- Molly Buckley
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK
| | - Maranda Kramer
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK
| | - Bronte Johnson
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK
| | - Gillian Huskin
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK
| | - Joel Berry
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35233, UK
| | - Mary Kathryn Sewell-Loftin
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6thAvenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, UK.
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35233, UK.
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2
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Doryab A, Heydarian M, Yildirim AÖ, Hilgendorff A, Behr J, Schmid O. Breathing-induced stretch enhances the efficacy of an inhaled and orally delivered anti-fibrosis drug in vitro. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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3
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Gong F, Yang Y, Wen L, Wang C, Li J, Dai J. An Overview of the Role of Mechanical Stretching in the Progression of Lung Cancer. Front Cell Dev Biol 2022; 9:781828. [PMID: 35004682 PMCID: PMC8740071 DOI: 10.3389/fcell.2021.781828] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/09/2021] [Indexed: 12/19/2022] Open
Abstract
Cells and tissues in the human body are subjected to mechanical forces of varying degrees, such as tension or pressure. During tumorigenesis, physical factors, especially mechanical factors, are involved in tumor development. As lung tissue is influenced by movements associated with breathing, it is constantly subjected to cyclical stretching and retraction; therefore, lung cancer cells and lung cancer-associated fibroblasts (CAFs) are constantly exposed to mechanical load. Thus, to better explore the mechanisms involved in lung cancer progression, it is necessary to consider factors involved in cell mechanics, which may provide a more comprehensive analysis of tumorigenesis. The purpose of this review is: 1) to provide an overview of the anatomy and tissue characteristics of the lung and the presence of mechanical stimulation; 2) to summarize the role of mechanical stretching in the progression of lung cancer; and 3) to describe the relationship between mechanical stretching and the lung cancer microenvironment, especially CAFs.
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Affiliation(s)
- Fengying Gong
- Department of Traditional Chinese Medicine, Nanfang Hospital of Southern Medical University, Guangzhou, China
| | - Yuchao Yang
- Guangdong Provincial Key Laboratory of Medical Biomechanics and Guangdong Engineering Research Center for Translation of Medical 3D Printing Application and National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Liangtao Wen
- Shiyue City Community Health Service Center, Shenzhen Integrated Traditional Chinese and Western Medicine Hospital, Shenzhen, China
| | - Congrong Wang
- Department of Laboratory Medicine, Nanfang Hospital of Southern Medical University, Guangzhou, China
| | - Jingjun Li
- Department of Traditional Chinese Medicine, Nanfang Hospital of Southern Medical University, Guangzhou, China
| | - Jingxing Dai
- Guangdong Provincial Key Laboratory of Medical Biomechanics and Guangdong Engineering Research Center for Translation of Medical 3D Printing Application and National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
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4
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Spencer A, Sligar AD, Chavarria D, Lee J, Choksi D, Patil NP, Lee H, Veith AP, Riley WJ, Desai S, Abbaspour A, Singeetham R, Baker AB. Biomechanical regulation of breast cancer metastasis and progression. Sci Rep 2021; 11:9838. [PMID: 33972619 PMCID: PMC8110548 DOI: 10.1038/s41598-021-89288-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/22/2021] [Indexed: 01/20/2023] Open
Abstract
Physical activity has been consistently linked to decreased incidence of breast cancer and a substantial increase in the length of survival of patients with breast cancer. However, the understanding of how applied physical forces directly regulate breast cancer remains limited. We investigated the role of mechanical forces in altering the chemoresistance, proliferation and metastasis of breast cancer cells. We found that applied mechanical tension can dramatically alter gene expression in breast cancer cells, leading to decreased proliferation, increased resistance to chemotherapeutic treatment and enhanced adhesion to inflamed endothelial cells and collagen I under fluidic shear stress. A mechanistic analysis of the pathways involved in these effects supported a complex signaling network that included Abl1, Lck, Jak2 and PI3K to regulate pro-survival signaling and enhancement of adhesion under flow. Studies using mouse xenograft models demonstrated reduced proliferation of breast cancer cells with orthotopic implantation and increased metastasis to the skull when the cancer cells were treated with mechanical load. Using high throughput mechanobiological screens we identified pathways that could be targeted to reduce the effects of load on metastasis and found that the effects of mechanical load on bone colonization could be reduced through treatment with a PI3Kγ inhibitor.
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Affiliation(s)
- Adrianne Spencer
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Andrew D Sligar
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Daniel Chavarria
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Jason Lee
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Darshil Choksi
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Nikita P Patil
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - HooWon Lee
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Austin P Veith
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - William J Riley
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Shubh Desai
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Ali Abbaspour
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Rohan Singeetham
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA
| | - Aaron B Baker
- Department of Biomedical Engineering, University of Texas at Austin, 1 University Station, BME 5.202D, C0800, Austin, TX, 78712, USA.
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX, USA.
- Institute for Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA.
- Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX, USA.
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5
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Schmitz C, Welck J, Tavernaro I, Grinberg M, Rahnenführer J, Kiemer AK, van Thriel C, Hengstler JG, Kraegeloh A. Mechanical strain mimicking breathing amplifies alterations in gene expression induced by SiO 2 NPs in lung epithelial cells. Nanotoxicology 2019; 13:1227-1243. [PMID: 31418614 DOI: 10.1080/17435390.2019.1650971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The effects of engineered nanomaterials on human health are still intensively studied in order to facilitate their safe application. However, relatively little is known how mechanical strain as induced in alveolar epithelial cells by breathing movements modifies biological responses to nanoparticles (NPs). In this study, A549 cells as a model for alveolar epithelial cells were exposed to 25 nm amorphous colloidal silica NPs under dynamic and static culture conditions. Gene array data, qPCR, and ELISA revealed an amplified effect of NPs when cells were mechanically stretched in order to model the physiological mechanical deformation during breathing. In contrast, treatment of cells with either strain or NPs alone only led to minor changes in gene expression or interleukin-8 (IL-8) secretion. Confocal microscopy revealed that stretching does not lead to an increased internalization of NPs, indicating that elevated intracellular NP accumulation is not responsible for the observed effect. Gene expression alterations induced by combined exposure to NPs and mechanical strain showed a high similarity to those known to be induced by TNF-α. This study suggests that the inclusion of mechanical strain into in vitro models of the human lung may have a strong influence on the test results.
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Affiliation(s)
- Carmen Schmitz
- INM-Leibniz Institute for New Materials , Saarbrücken , Germany.,Department of Pharmacy, Pharmaceutical Biology, Saarland University , Saarbrücken , Germany
| | - Jennifer Welck
- INM-Leibniz Institute for New Materials , Saarbrücken , Germany
| | | | - Marianna Grinberg
- Department of Statistics, TU Dortmund University , Dortmund , Germany
| | - Jörg Rahnenführer
- Department of Statistics, TU Dortmund University , Dortmund , Germany
| | - Alexandra K Kiemer
- Department of Pharmacy, Pharmaceutical Biology, Saarland University , Saarbrücken , Germany
| | - Christoph van Thriel
- IfADo-Leibniz Research Centre for Working Environment and Human Factors , Dortmund , Germany
| | - Jan G Hengstler
- IfADo-Leibniz Research Centre for Working Environment and Human Factors , Dortmund , Germany
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6
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Bregenzer ME, Horst EN, Mehta P, Novak CM, Repetto T, Mehta G. The Role of Cancer Stem Cells and Mechanical Forces in Ovarian Cancer Metastasis. Cancers (Basel) 2019; 11:E1008. [PMID: 31323899 PMCID: PMC6679114 DOI: 10.3390/cancers11071008] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/12/2019] [Accepted: 07/17/2019] [Indexed: 02/07/2023] Open
Abstract
Ovarian cancer is an extremely lethal gynecologic disease; with the high-grade serous subtype predominantly associated with poor survival rates. Lack of early diagnostic biomarkers and prevalence of post-treatment recurrence, present substantial challenges in treating ovarian cancers. These cancers are also characterized by a high degree of heterogeneity and protracted metastasis, further complicating treatment. Within the ovarian tumor microenvironment, cancer stem-like cells and mechanical stimuli are two underappreciated key elements that play a crucial role in facilitating these outcomes. In this review article, we highlight their roles in modulating ovarian cancer metastasis. Specifically, we outline the clinical relevance of cancer stem-like cells, and challenges associated with their identification and characterization and summarize the ways in which they modulate ovarian cancer metastasis. Further, we review the mechanical cues in the ovarian tumor microenvironment, including, tension, shear, compression and matrix stiffness, that influence (cancer stem-like cells and) metastasis in ovarian cancers. Lastly, we outline the challenges associated with probing these important modulators of ovarian cancer metastasis and provide suggestions for incorporating these cues in basic biology and translational research focused on metastasis. We conclude that future studies on ovarian cancer metastasis will benefit from the careful consideration of mechanical stimuli and cancer stem cells, ultimately allowing for the development of more effective therapies.
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Affiliation(s)
- Michael E Bregenzer
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI 48109, USA
| | - Eric N Horst
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI 48109, USA
| | - Pooja Mehta
- Department of Materials Science and Engineering; University of Michigan, Ann Arbor, MI 48109, USAeering
| | - Caymen M Novak
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI 48109, USA
| | - Taylor Repetto
- Department of Materials Science and Engineering; University of Michigan, Ann Arbor, MI 48109, USAeering
| | - Geeta Mehta
- Department of Biomedical Engineering; University of Michigan, Ann Arbor, MI 48109, USA.
- Department of Materials Science and Engineering; University of Michigan, Ann Arbor, MI 48109, USAeering.
- Macromolecular Science and Engineering; University of Michigan, Ann Arbor, MI 48109, USA.
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.
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7
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Sleeboom JJF, Eslami Amirabadi H, Nair P, Sahlgren CM, den Toonder JMJ. Metastasis in context: modeling the tumor microenvironment with cancer-on-a-chip approaches. Dis Model Mech 2018; 11:11/3/dmm033100. [PMID: 29555848 PMCID: PMC5897732 DOI: 10.1242/dmm.033100] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Most cancer deaths are not caused by the primary tumor, but by secondary tumors formed through metastasis, a complex and poorly understood process. Cues from the tumor microenvironment, such as the biochemical composition, cellular population, extracellular matrix, and tissue (fluid) mechanics, have been indicated to play a pivotal role in the onset of metastasis. Dissecting the role of these cues from the tumor microenvironment in a controlled manner is challenging, but essential to understanding metastasis. Recently, cancer-on-a-chip models have emerged as a tool to study the tumor microenvironment and its role in metastasis. These models are based on microfluidic chips and contain small chambers for cell culture, enabling control over local gradients, fluid flow, tissue mechanics, and composition of the local environment. Here, we review the recent contributions of cancer-on-a-chip models to our understanding of the role of the tumor microenvironment in the onset of metastasis, and provide an outlook for future applications of this emerging technology. Summary: This Review evaluates the recent contributions of cancer-on-a-chip models to our understanding of the tumor microenvironment and its role in the onset of metastasis. The authors also provide an outlook for future applications of this emerging technology.
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Affiliation(s)
- Jelle J F Sleeboom
- Microsystems Group, Department of Mechanical Engineering, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Soft Tissue Engineering & Mechanobiology, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands
| | - Hossein Eslami Amirabadi
- Microsystems Group, Department of Mechanical Engineering, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands
| | - Poornima Nair
- Microsystems Group, Department of Mechanical Engineering, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands
| | - Cecilia M Sahlgren
- Soft Tissue Engineering & Mechanobiology, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands.,Turku Centre for Biotechnology, Åbo Akademi University, Domkyrkotorget 3, FI-20500, Turku, Finland
| | - Jaap M J den Toonder
- Microsystems Group, Department of Mechanical Engineering, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands .,Institute for Complex Molecular Systems, Eindhoven University of Technology, Gemini-Zuid, Groene Loper 15, 5612AZ, Eindhoven, The Netherlands
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8
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Meenach SA, Tsoras AN, McGarry RC, Mansour HM, Hilt JZ, Anderson KW. Development of three-dimensional lung multicellular spheroids in air- and liquid-interface culture for the evaluation of anticancer therapeutics. Int J Oncol 2016; 48:1701-9. [PMID: 26846376 PMCID: PMC4777598 DOI: 10.3892/ijo.2016.3376] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/21/2016] [Indexed: 12/26/2022] Open
Abstract
Three-dimensional (3D) lung multicellular spheroids (MCS) in liquid-covered culture (LCC) and air-interface culture (AIC) conditions have both been developed for the evaluation of aerosol anticancer therapeutics in solution and aerosols, respectively. The MCS were formed by seeding lung cancer cells on top of collagen where they formed spheroids due to the prevalence of cell-to-cell interactions. LCC MCS were exposed to paclitaxel (PTX) in media whereas AIC MCS were exposed to dry powder PEGylated phospholipid aerosol microparticles containing paclitaxel. The difference in viability for 2D versus 3D culture for both LCC and AIC was evaluated along with the effects of the particles on lung epithelium via transepithelial electrical resistance (TEER) measurements. For LCC and AIC conditions, the 3D spheroids were more resistant to treatment with higher IC50 values for A549 and H358 cell lines. TEER results initially indicated a decrease in resistance upon drug or particle exposure, however, these values increased over the course of several days indicating the ability of the cells to recover. Overall, these studies offer a comprehensive in vitro evaluation of aerosol particles used in the treatment of lung cancer while introducing a new method for culturing lung cancer MCS in both LCC and AIC conditions.
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Affiliation(s)
- Samantha A Meenach
- Department of Pharmaceutical Sciences - Drug Development Division, University of Kentucky, Lexington, KY 40536, USA
| | - Alexandra N Tsoras
- Department of Chemical and Materials Engineering, University of Kentucky, College of Engineering, Lexington, KY 40506, USA
| | - Ronald C McGarry
- Department of Radiation Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Heidi M Mansour
- Department of Pharmaceutical Sciences - Drug Development Division, University of Kentucky, Lexington, KY 40536, USA
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, College of Engineering, Lexington, KY 40506, USA
| | - Kimberly W Anderson
- Department of Chemical and Materials Engineering, University of Kentucky, College of Engineering, Lexington, KY 40506, USA
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9
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Mechanical stress promotes cisplatin-induced hepatocellular carcinoma cell death. BIOMED RESEARCH INTERNATIONAL 2015; 2015:430569. [PMID: 25685789 PMCID: PMC4317602 DOI: 10.1155/2015/430569] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/18/2014] [Accepted: 10/13/2014] [Indexed: 01/21/2023]
Abstract
Cisplatin (CisPt) is a commonly used platinum-based chemotherapeutic agent. Its efficacy is limited due to drug resistance and multiple side effects, thereby warranting a new approach to improving the pharmacological effect of CisPt. A newly developed mathematical hypothesis suggested that mechanical loading, when coupled with a chemotherapeutic drug such as CisPt and immune cells, would boost tumor cell death. The current study investigated the aforementioned mathematical hypothesis by exposing human hepatocellular liver carcinoma (HepG2) cells to CisPt, peripheral blood mononuclear cells, and mechanical stress individually and in combination. HepG2 cells were also treated with a mixture of CisPt and carnosine with and without mechanical stress to examine one possible mechanism employed by mechanical stress to enhance CisPt effects. Carnosine is a dipeptide that reportedly sequesters platinum-based drugs away from their pharmacological target-site. Mechanical stress was achieved using an orbital shaker that produced 300 rpm with a horizontal circular motion. Our results demonstrated that mechanical stress promoted CisPt-induced death of HepG2 cells (~35% more cell death). Moreover, results showed that CisPt-induced death was compromised when CisPt was left to mix with carnosine 24 hours preceding treatment. Mechanical stress, however, ameliorated cell death (20% more cell death).
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10
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Yallapu MM, Katti KS, Katti DR, Mishra SR, Khan S, Jaggi M, Chauhan SC. The roles of cellular nanomechanics in cancer. Med Res Rev 2014; 35:198-223. [PMID: 25137233 DOI: 10.1002/med.21329] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The biomechanical properties of cells and tissues may be instrumental in increasing our understanding of cellular behavior and cellular manifestations of diseases such as cancer. Nanomechanical properties can offer clinical translation of therapies beyond what are currently employed. Nanomechanical properties, often measured by nanoindentation methods using atomic force microscopy, may identify morphological variations, cellular binding forces, and surface adhesion behaviors that efficiently differentiate normal cells and cancer cells. The aim of this review is to examine current research involving the general use of atomic force microscopy/nanoindentation in measuring cellular nanomechanics; various factors and instrumental conditions that influence the nanomechanical properties of cells; and implementation of nanoindentation methods to distinguish cancer cells from normal cells or tissues. Applying these fundamental nanomechanical properties to current discoveries in clinical treatment may result in greater efficiency in diagnosis, treatment, and prevention of cancer, which ultimately can change the lives of patients.
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Affiliation(s)
- Murali M Yallapu
- Department of Pharmaceutical Sciences and Center for Cancer Research, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee, 38163
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11
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Diaz FJ, McDonald PR, Roy A, Taylor B, Price A, Hall J, Blagg BSJ, Chaguturu R. Compound ranking based on a new mathematical measure of effectiveness using time course data from cell-based assays. Comb Chem High Throughput Screen 2012; 16:168-79. [PMID: 22934946 DOI: 10.2174/1386207311316030002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 07/06/2012] [Accepted: 07/15/2012] [Indexed: 11/22/2022]
Abstract
The half maximal inhibitory concentration (IC₅₀) has several limitations that make it unsuitable for examining a large number of compounds in cytotoxicity studies, particularly when multiple exposure periods are tested. This article proposes a new approach to measure drug effectiveness, which allows ranking compounds according to their toxic effects on live cells. This effectiveness measure, which combines all exposure times tested, compares the growth rates of a particular cell line in the presence of the compound with its growth rate in the presence of DMSO alone. Our approach allows measuring a wider spectrum of toxicity than the IC₅₀ approach, and allows automatic analyses of a large number of compounds. It can be easily implemented in linear regression software, provides a comparable measure of effectiveness for each investigated compound (both toxic and non-toxic), and allows statistically testing the null hypothesis that a compound is non-toxic versus the alternative that it is toxic. Importantly, our approach allows defining an automated decision rule for deciding whether a compound is significantly toxic. As an illustration, we describe the results of a cellbased study of the cytotoxicity of 24 analogs of novobiocin, a C-terminal inhibitor of heat shock protein 90 (Hsp90); the compounds were ranked in order of cytotoxicity to a panel of 18 cancer cell lines and 1 normal cell line. Our approach may also be a good alternative to computing the half maximal effective concentration (EC₅₀) in studies searching for compounds that promote cell growth.
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Affiliation(s)
- Francisco J Diaz
- Department of Biostatistics, University of Kansas Medical Center, Mail Stop 1026, 3901 Rainbow Blvd., Kansas City, KS 66160, USA.
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