scholarly journals Effects of rotary cell culture system‐simulated microgravity on the ultrastructure and biological behavior of human MDA‐MB‐231 breast cancer cells

2019 ◽  
Vol 3 (3) ◽  
pp. 87-93 ◽  
Author(s):  
Nan Jiang ◽  
Zhengyang Chen ◽  
Binbin Li ◽  
Song Guo ◽  
Ao Li ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cell Culture ◽  
Cancer Cells ◽  
Culture System ◽  
Breast Cancer Cells ◽  
Simulated Microgravity ◽  
Biological Behavior ◽  
Cell Culture System ◽  
Rotary Cell Culture System

scholarly journals Muscle Atrophy Marker Expression Differs between Rotary Cell Culture System and Animal Studies

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Charles P. Harding ◽  
Elizabeth Vargis
Keyword(s):  
Cell Culture ◽  
Muscle Tissue ◽  
Culture System ◽  
Simulated Microgravity ◽  
Caspase 3 ◽  
C2c12 Cells ◽  
Cell Culture System ◽  
Rotary Cell Culture System

Muscular atrophy, defined as the loss of muscle tissue, is a serious issue for immobilized patients on Earth and for humans during spaceflight, where microgravity prevents normal muscle loading. In vitro modeling is an important step in understanding atrophy mechanisms and testing countermeasures before animal trials. The most ideal environment for modeling must be empirically determined to best mimic known responses in vivo. To simulate microgravity conditions, murine C2C12 myoblasts were cultured in a rotary cell culture system (RCCS). Alginate encapsulation was compared against polystyrene microcarrier beads as a substrate for culturing these adherent muscle cells. Changes after culture under simulated microgravity were characterized by assessing mRNA expression of MuRF1, MAFbx, Caspase 3, Akt2, mTOR, Ankrd1, and Foxo3. Protein concentration of myosin heavy chain 4 (Myh4) was used as a differentiation marker. Cell morphology and substrate structure were evaluated with brightfield and fluorescent imaging. Differentiated C2C12 cells encapsulated in alginate had a significant increase in MuRF1 only following simulated microgravity culture and were morphologically dissimilar to normal cultured muscle tissue. On the other hand, C2C12 cells cultured on polystyrene microcarriers had significantly increased expression of MuRF1, Caspase 3, and Foxo3 and easily identifiable multinucleated myotubes. The extent of differentiation was higher in simulated microgravity and protein synthesis more active with increased Myh4, Akt2, and mTOR. The in vitro microcarrier model described herein significantly increases expression of several of the same atrophy markers as in vivo models. However, unlike animal models, MAFbx and Ankrd1 were not significantly increased and the fold change in MuRF1 and Foxo3 was lower than expected. Using a standard commercially available RCCS, the substrates and culture methods described only partially model changes in mRNAs associated with atrophy in vivo.

Decreased E-Cadherin in MCF7 Human Breast Cancer Cells Forming Multicellular Spheroids Exposed to Simulated Microgravity

PROTEOMICS ◽  
2018 ◽  
Vol 18 (13) ◽  
pp. 1800015 ◽  
Author(s):  
Jayashree Sahana ◽  
Mohamed Zakaria Nassef ◽  
Markus Wehland ◽  
Sascha Kopp ◽  
Marcus Krüger ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Human Breast Cancer ◽  
Breast Cancer Cells ◽  
Simulated Microgravity ◽  
Human Breast Cancer Cells ◽  
Human Breast ◽  
Multicellular Spheroids ◽  
E Cadherin

Length vs. stiffness: which plays a dominant role in the cellular uptake of fructose-based rod-like micelles by breast cancer cells in 2D and 3D cell culture models?

2018 ◽  
Vol 6 (25) ◽  
pp. 4223-4231 ◽  
Author(s):  
Jiacheng Zhao ◽  
Hongxu Lu ◽  
Yin Yao ◽  
Sylvia Ganda ◽  
Martina H. Stenzel
Keyword(s):  
Breast Cancer ◽  
Cell Culture ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Dominant Role ◽  
3D Cell Culture ◽  
Culture Models ◽  
Nano Rods ◽  
2D And 3D ◽  
Cell Culture Models

Internalization of rod-like micelles by breast cancer cells is significantly affected by the stiffness of nano-rods.

Tumor-Associated Macrophages of the M1/ M2 Phenotype are Involved in the Regulation of Malignant Biological Behavior of Breast Cancer Cells Through the EMT Pathway

2021 ◽  
Author(s):  
zhuo Chen ◽  
jing Wu ◽  
liang Wang ◽  
hua Zhao ◽  
jie He
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Poor Prognosis ◽  
Breast Cancer Cells ◽  
Epithelial Mesenchymal Transition ◽  
Tissue Microarrays ◽  
Biological Behavior ◽  
Breast Cancer Cell Lines ◽  
Mesenchymal Transition ◽  
The Matrix

Abstract Triple negative breast cancer (TNBC) is the most aggressive subtype of breast cancer. More and more studies have shown that the tumor immune microenvironment (TME) of TNBC is closely related to its poor prognosis and early metastasis. We try to explain how tumor-associate macrophages (TAMs）, an important component of the TME, function in the matrix of TNBC. Therefore, we induced THP-1 cells to become M1-TAMs and M2-TAMs, investigated their influence on breast cancer cells. 82 TNBC paraffin samples were made into tissue microarrays. The expression of macrophages makers were measured by immunohistochemistry. Scratch assay, Transwell assay, CCK-8 cell proliferation assay were performed in the co-culture system of breast cancer cells lines and macrophages to observe the invasion and proliferation ability of breast cancer cell lines. Western Blot (WB) was performed to detect the expression of E-cadherin (CDH1) and N-cadherin (CDH2). M2-TAMs were more numerous than M1-TAMs in the matrix of TNBC cancer nests and associated with poor prognosis. M2-TAMs promoted the invasion, migration and proliferation of TNBC cells. M1-TAMs had inhibitory effects. In MCF-7 cells, WB showed a decrease in CDH1 and an increase in CDH2. In MDA-MB-231 cells and BT549 cells, CDH2 expression was reduced and CDH1 expression was increased. All of the above results were statistically significant, p < 0.001. M2-TAMs were more numerous in TNBC and associated with poor prognosis. M2-TAMs promoted the invasion, migration and proliferation of breast cancer cells. The mechanism may be related to the epithelial-mesenchymal transition (EMT).

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