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Effect of Compressive Stress in Tumor Microenvironment on Malignant Tumor Spheroid Invasion Process.

ABSTRACT: In this study, we proposed an in vitro tumor model to simulate the mechanical microenvironment and investigate the effect of compressive stress on the invasion process of malignant tumors. It has been pointed out that the biomechanical environment, as well as the biochemical environment, could affect the transformation of cancer cell migration, invasion, and metastasis. We hypothesized that the solid stress caused by the exclusion of surrounding tissue could transform tumor cells from noninvasive to invasive phenotypes. Colorectal cell spheroids were embedded and cultured in agarose gels of varying concentrations to simulate the earliest stages of tumor formation and invasion. The spheroids embedded in gels at higher concentrations showed peculiar growth after 72 h of culture, and the external compressive loading imposed on them caused peculiar growth even in the gels at lower concentrations. In conclusion, the mechanical microenvironment caused the transformation of tumor cell phenotypes, promoting the growth and invasion of tumor cell spheroids.

SUBMITTER: Nishi R

PROVIDER: S-EPMC9266885 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Effect of Compressive Stress in Tumor Microenvironment on Malignant Tumor Spheroid Invasion Process.

Nishi Ryota R Oda Yudai Y Morikura Takashi T Miyata Shogo S

International journal of molecular sciences 20220625 13

In this study, we proposed an in vitro tumor model to simulate the mechanical microenvironment and investigate the effect of compressive stress on the invasion process of malignant tumors. It has been pointed out that the biomechanical environment, as well as the biochemical environment, could affect the transformation of cancer cell migration, invasion, and metastasis. We hypothesized that the solid stress caused by the exclusion of surrounding tissue could transform tumor cells from noninvasiv ...[more]

PMID: 35806095

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Project description:Background & aimsHepatocellular carcinoma (HCC) is the third-leading and fastest rising cause of cancer-related death worldwide. The discovery and preclinical development of compounds targeting HCC are hampered by the absence of authentic tractable systems recapitulating the heterogeneity of HCC tumors in patients and the tumor microenvironment (TME).MethodsWe established a novel and simple patient-derived multicellular tumor spheroid model based on clinical HCC tumor tissues, processed using enzymatic and mechanical dissociation. After quality controls, 22 HCC tissues and 17 HCC sera were selected for tumor spheroid generation and perturbation studies. Cells were grown in 3D in optimized medium in the presence of patient serum. Characterization of the tumor spheroid cell populations was performed by flow cytometry, immunohistochemistry (IHC), and functional assays. As a proof of concept, we treated patient-derived spheroids with FDA-approved anti-HCC compounds.ResultsThe model was successfully established independently from cancer etiology and grade from 22 HCC tissues. The use of serum from patients with HCC was essential for tumor spheroid generation, TME function, and maintenance of cell viability. The tumor spheroids comprised the main cell compartments, including epithelial cancer cells, as well as all major cell populations of the TME [i.e. cancer-associated fibroblasts (CAFs), macrophages, T cells, and endothelial cells]. Tumor spheroids reflected HCC heterogeneity, including variability in cell type proportions and TME, and mimicked the original tumor features. Moreover, differential responses to FDA-approved anti-HCC drugs were observed between the donors, as observed in patients.ConclusionsThis patient HCC serum-tumor spheroid model provides novel opportunities for drug discovery and development as well as mechanism-of-action studies including compounds targeting the TME. This model will likely contribute to improve the therapeutic outcomes for patients with HCC.Impact and implicationsHCC is a leading and fast-rising cause of cancer-related death worldwide. Despite approval of novel therapies, the outcome of advanced HCC remains unsatisfactory. By developing a novel patient-derived tumor spheroid model recapitulating tumor heterogeneity and microenvironment, we provide new opportunities for HCC drug development and analysis of mechanism of action in authentic patient tissues. The application of the patient-derived tumor spheroids combined with other HCC models will likely contribute to drug development and to improve the outcome of patients with HCC.

Dataset Information

Effect of Compressive Stress in Tumor Microenvironment on Malignant Tumor Spheroid Invasion Process.

Publications

Effect of Compressive Stress in Tumor Microenvironment on Malignant Tumor Spheroid Invasion Process.

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