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https://www.readbyqxmd.com/read/29141026/in-depth-phenotypic-characterization-of-multicellular-tumor-spheroids-effects-of-5-fluorouracil
#1
Angélique Virgone-Carlotta, Manon Lemasson, Hichem C Mertani, Jean-Jacques Diaz, Sylvain Monnier, Thomas Dehoux, Hélène Delanoë-Ayari, Charlotte Rivière, Jean-Paul Rieu
MultiCellular Tumor Spheroids (MCTS), which mimic the 3-Dimensional (3D) organization of a tumor, are considered as better models than conventional cultures in 2-Dimensions (2D) to study cancer cell biology and to evaluate the response to chemotherapeutic drugs. A real time and quantitative follow-up of MCTS with simple and robust readouts to evaluate drug efficacy is still missing. Here, we evaluate the chemotherapeutic drug 5-Fluorouracil (5-FU) response on the growth and integrity of MCTS two days after treatment of MCTS and for three colorectal carcinoma cell lines with different cohesive properties (HT29, HCT116 and SW480)...
2017: PloS One
https://www.readbyqxmd.com/read/29138850/role-of-mitochondrial-function-in-the-invasiveness-of-human-colon-cancer-cells
#2
Chen-Sung Lin, Li-Tzu Liu, Liang-Hung Ou, Siao-Cian Pan, Chia-I Lin, Yau-Huei Wei
We investigated the role of mitochondrial function in the invasiveness of human colorectal cancer (CRC) cell lines, using paired primary SW480 and metastatic SW620 cells, and appraised the clinical relevance of the alteration of mtDNA copy number in 33 pairs of CRC specimens after surgical resection. Suppression of mitochondrial function was achieved by the exposure of cells to oligomycin A (OA) or by knockdown of mitochondrial transcriptional factor A (TFAM) to evaluate their effects on energy metabolism, reactive oxygen species, protein expression levels of epithelial-mesenchymal transition (EMT) markers and invasive activity of CRC cells...
November 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29131639/proteomic-characterization-of-transcription-and-splicing-factors-associated-with-a-metastatic-phenotype-in-colorectal-cancer
#3
Sofia Torres, Irene Garcia-Palmero, Consolación Marin-Vicente, Ruben A Bartolome, Eva Calviño, María Jesús Fernandez-Aceñero, J Ignacio Casal
We investigated new transcription and splicing factors associated with the metastatic phenotype in colorectal cancer. A concatenated tandem array of consensus transcription factors (TFs)-response elements was used to pull down nuclear extracts in two different pairs of colorectal cancer cells, KM12SM/KM12C and SW620/480, genetically-related but differing in metastatic ability. Proteins were analyzed by label-free LC-MS and quantified with MaxLFQ. We found 240 proteins showing a significant dysregulation in highly-metastatic KM12SM cells relative to non-metastatic KM12C cells and 257 proteins in metastatic SW620 versus SW480...
November 13, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29122850/differential-preventive-activity-of-sulindac-and-atorvastatin-in-apc-min-fccc-mice-with-or-without-colorectal-adenomas
#4
Wen-Chi L Chang, Christina Jackson, Stacy Riel, Harry S Cooper, Karthik Devarajan, Harvey H Hensley, Yan Zhou, Lisa A Vanderveer, Minhhuyen T Nguyen, Margie L Clapper
OBJECTIVE: The response of subjects to preventive intervention is heterogeneous. The goal of this study was to determine if the efficacy of a chemopreventive agent differs in non-tumour-bearing animals versus those with colorectal tumours. Sulindac and/or atorvastatin was administered to Apc(+/Min-FCCC) mice with known tumour-bearing status at treatment initiation. DESIGN: Male mice (6-8 weeks old) underwent colonoscopy and received control chow or chow with sulindac (300 ppm), atorvastatin (100 ppm) or sulindac/atorvastatin...
November 9, 2017: Gut
https://www.readbyqxmd.com/read/29115635/a-potential-role-for-hepcidin-in-obesity-driven-colorectal-tumourigenesis
#5
Elisabeth Phillips, Richard D Horniblow, Vikki Poole, Matthew Bedford, Douglas G Ward, Amanda J Kirkham, Jeremy Tomlinson, Tariq H Iqbal, Chris Tselepis
The obesity epidemic is associated with increases in the incidence of several types of cancer, including colorectal cancer, and is associated with poor outcomes for patients. Adipose tissue is considered biologically active and represents a plausible link between cancer and obesity due to the many factors that it secretes. In the present study, human adipose tissue was cultured in vitro and predifferentiated adipocyte secretome [preadipocyte (PAS)] and differentiated adipocyte secretome (DAS) were collected...
October 31, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29115593/mir-17-3p-regulates-the-proliferation-and-survival-of-colon-cancer-cells-by-targeting-par4
#6
Debao Lu, Liang Tang, Yan Zhuang, Peng Zhao
Colorectal cancer (CRC) is a common malignancy worldwide. However, the pathogenesis by which CRC progression occurs remains to be elucidated. The present study investigated the role of miRNA (miR)‑17‑3P in the regulation of CRC cell survival. Firstly, miR‑17‑3P expression was aberrantly upregulated in human CRC tumor tissues compared with controls. Further results demonstrated that the proliferation capacity of human CRC SW480 and LoVo cells was significantly increased by an miR‑17‑3P specific mimic, and was inhibited by miR‑17‑3P silencing...
October 25, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115557/hypoxia-induces-differential-expression-patterns-of-osteopontin-and-cd44-in-colorectal-carcinoma
#7
Gisela Wohlleben, Konstantin Hauff, Martin Gasser, Ana Maria Waaga-Gasser, Tanja Grimmig, Michael Flentje, Bülent Polat
The plasma protein osteopontin (OPN) is considered to be a tumor biomarker, where elevated plasma levels are associated with poor prognosis. Additionally, OPN is expressed in the presence of tumor hypoxia, which is an adverse prognostic factor in radiation oncology. One of its receptors, the proposed tumor stem cell marker CD44, is also associated with aggressive tumors, shown for example in colon cancer. The expression of CD44 and its splice variants (particularly CD44v6) can be upregulated by OPN itself. In the present study, we aimed to investigate the influence of hypoxia on the expression of OPN and its binding partners CD44 and CD44v6 in colon carcinoma cell lines in vitro, using SW480, SW620, HT29 and HCT116 cells...
November 1, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29115546/influence-of-the-twist-gene-on-the-invasion-and-metastasis-of-colon-cancer
#8
Duowei Wang, Bikash Rai, Feng Qi, Tong Liu, Jinmiao Wang, Xiaodong Wang, Bozhao Ma
The present study investigated the role of the Twist gene in epithelial-mesenchymal transition (EMT) and its effects on the invasion and metastasis of malignant tumors. In vitro, we transfected SW480, HCT116 and HT29 cells with recombinant plasmids, pTracer-CMV/BSD-Twist and pGenesil1.2-Twist-shRNA, to influence expression of Twist. The transfection efficacy of the plasmids in the cell lines was confirmed by flow cytometry. The relative mRNA and protein expression levels of Twist, E-cadherin and vimentin in the transfected cells were detected by RT-PCR and western blotting, respectively...
November 6, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29115492/epithelial%C3%A2-mesenchymal-transition-in-colorectal-carcinoma-cells-is-mediated-by-dek-imp3
#9
Shuping You, Yun Guan, Weihong Li
To investigate the inhibitory effects of DEK/insulin‑like growth factor II mRNA binding protein 3 (IMP3) on epithelial‑mesenchymal transition (EMT) in colorectal carcinoma cells. SW620 and SW480 cell lines were selected. DEK‑interfering lentivirus was transfected to knockdown DEK expression. Subsequently, MTT assays and flow cytometry were utilized to measure cell viability, and apoptosis, respectively. Cell invasion was detected using a Transwell assay. Quantitative polymerase chain reaction and western blot analysis were used to detect the expression of E‑cadherin, vimentin, and matrix metalloproteinase (MMP)‑9...
November 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29115148/a-new-polyoxygenated-cyclohexene-derivative-from-artabotrys-hainanensis
#10
Jin-Ying Tang, Yan-Ping Liu, Peng-Kun Ju, Xiu-Lan Luo, Zhi-Jie Zhang, Peng Ren, Liang Lai, Guang-Ying Chen, Yan-Hui Fu
A new polyoxygenated cyclohexene derivative, artahainanol A (1), together with three known analogues (2-4), was isolated from the stems and leaves of Artabotrys hainanensis. Among them, 1 is an unusual polyoxygenated cyclohexene containing 14 carbon atoms on the carbon skeleton. All known compounds (2-4) were isolated from the genus Artabotrys for the first time. The structure of 1 was elucidated by extensive spectroscopic methods and the known compounds were identified by comparisons with data reported in the literature...
November 8, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29113267/overexpression-of-rictor-protein-in-colorectal-cancer-is-correlated-with-tumor-progression-and-prognosis
#11
Lifeng Wang, Jia Qi, Jinlong Yu, Haijin Chen, Zhaowei Zou, Xiaohua Lin, Linlang Guo
In order to understand the clinical significance of rapamycin-insensitive companion of mammalian target of rapamycin (Rictor) in colorectal cancer (CRC), 62 CRC tissue samples excised during operations were evaluated by immunohistochemistry. Analysis of the association between the expression level of Rictor protein and clinicopathological parameters demonstrated that the expression level of Rictor in CRC tissues was significantly higher than that in paracarcinoma tissues (P<0.0001). In cellular experiments, this result was further confirmed by comparing differences in Rictor expression between the CRC cell lines HCT116, SW480 and LoVo, and the human normal liver cell line HL-7702...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29113214/ginkgolic-acid-inhibits-the-invasiveness-of-colon-cancer-cells-through-ampk-activation
#12
Lina Qiao, Jianbao Zheng, Xianzhen Jin, Guangbing Wei, Guanghui Wang, Xuejun Sun, Xuqi Li
Tumor cell invasion and metastasis are important processes in colorectal cancer that exert negative effects on patient outcomes; consequently, a prominent topic in the field of colorectal cancer study is the identification of safe and affordable anticancer drugs against cell invasion and metastasis, with limited side effects. Ginkgolic acid is a phenolic acid extracted from ginkgo fruit, ginkgo exotesta and ginkgo leaves. Previous studies have indicated that ginkgolic acid inhibits tumor growth and invasion in a number of types of cancer; however, limited studies have considered the effects of ginkgolic acid on colon cancer...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29111205/hsa-mir-11181-regulates-wnt-signaling-pathway-through-targeting-of-apc2-transcripts-in-sw480-cell-line
#13
Sadat Dokanehiifard, Bahram M Soltani
Wnt signaling plays important roles in differentiation, morphogenesis and development. This signaling pathway is highly regulated at all levels and microRNAs are small noncoding RNAs regulating Wnt signaling. Here, we intended to investigate hsa-miR-11181 (a novel miRNA located in TrkC gene) effect on Wnt signaling pathway in SW480 cell line. TOP/FOP flash assay indicated up-regulation of Wnt signaling, following the overexpression of hsa-miR-11181, verified through RT-qPCR. Bioinformatics analysis predicted APC1, APC2 and Axin1 might be targeted by hsa-miR-11181...
October 27, 2017: Gene
https://www.readbyqxmd.com/read/29107689/semi-synthetic-salinomycin-analogs-exert-cytotoxic-activity-against-human-colorectal-cancer-stem-cells
#14
Johannes Klose, Sarah Kattner, Björn Borgström, Claudia Volz, Thomas Schmidt, Martin Schneider, Stina Oredsson, Daniel Strand, Alexis Ulrich
Salinomycin, a polyether antibiotic, is a well-known inhibitor of human cancer stem cells. Chemical modification of the allylic C20 hydroxyl of salinomycin has enabled access to synthetic analogs that display increased cytotoxic activity compared to the native structure. The aim of this study was to investigate the activity of a cohort of C20-O-acyl analogs of salinomycin on human colorectal cancer cell lines in vitro. Two human colorectal cancer cell lines (SW480 and SW620) were exposed to three C20-O-acylated analogs and salinomycin...
October 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29104111/clinical-and-biological-significance-of-mir-193a-3p-targeted-kras-in-colorectal-cancer-pathogenesis
#15
Afraa Mamoori, Riajul Wahab, Farhadul Islam, Katherine Lee, Jelena Vider, Cu-Tai Lu, Vinod Gopalan, Alfred King-Yin Lam
This study was to investigate the expression pattern, mechanisms and clinicopathological implications of miR-193a-3p in colorectal cancer. Fresh frozen tissues from 70 matched colorectal adenocarciomas and the adjacent non-neoplastic mucosae were prospectively collected. Two colorectal cancer cell lines (SW480 and SW48) and a non-neoplastic colon cell line (FHC) were also used. The expression levels of miR193a-3p in the cells and tissues were measured by quantitative real-time polymerase chain reaction. The expression of KRAS protein as a predicted downstream target for miR-193a was studied by immunohistochemistry...
November 2, 2017: Human Pathology
https://www.readbyqxmd.com/read/29099643/significant-expression-of-taz-protein-in-colon-cancer-cells-and-it-s-downregulation-by-radiation
#16
Surajit Pathak, Antara Banerjee, Wen-Jian Meng, Suman Kumar Nandy, Madhumala Gopinath, Xiao-Feng Sun
AIM: To demonstrate the radiation responses of TAZ in colon cancer. METHODS: TAZ expression was examined in colon cancer cell lines SW480, KM12C, SW620 and KM12L4a. We used KM12C and KM12L4a for the experiment by using X-rays and UV rays (mW/cm(2)). We used HCT15 cell line to test the expression of TAZ by using an anti-TAZ drug, viz., 9-fluorenone, which is a hippo-yap/taz signaling inhibitor. The experimentation also involved exposing HCT15 cell line, to radiation...
November 3, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29084019/expression-of-klf6-sv2-in-colorectal-cancer-and-its-impact-on-proliferation-and-apoptosis
#17
Biao Zhang, Dan-Dan Guo, Jia-Ying Zheng, Yan-An Wu
Kruppel like factor 6 (KLF6), a member of KLF family, which has classic zinc finger structure, is broadly considered to have anticancer activity. The role of SV2 variant, one of KLF6 alternative splicing isoforms has not yet been definite in the colorectal cancer. This study aimed to detect the expression of the KLF6-SV2 in colorectal cancer and investigate its impact on cell proliferation and apoptosis. qRT-PCR was used to quantitatively determine KLF6-SV2 mRNA expression in colorectal cancer samples, corresponding normal tissue, normal colonic mucosal cell line FHC and seven colorectal cancer cell lines...
October 27, 2017: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/29082697/-effect-of-resveratrol-in-regulating-proliferation-and-apoptosis-of-rectal-cancer-cells-via-up-regulating-pten
#18
Ling-Juan Lao, Xin-Jiang Song, Jia Xu
To analysis the relative expression of PTEN(phosphatase and tensin homology deleted on chromosome ten) in rectal cancer cell lines and the effects of resveratrol on cell proliferation and apoptosis of rectal cancer cells in vitro. Western blot was used to assess the protein expression of PTEN in rectal cancer cell lines and non-malignant colon epithelial cell line. After treating human rectal cancer cell line SW480 with different concentrations of resveratrol, the cellular proliferation was detected by cell counting Kit-8(CCK-8) assay...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29079348/secretion-of-the-angiogenic-factor-vegf-after-photodynamic-therapy-with-ala-under-hypoxia-like-conditions-in-colon-cancer-cells
#19
Aleksandra Kawczyk-Krupka, Beata Kwiatek, Zenon Czuba, Anna Mertas, Wojciech Latos, Thomas Verwanger, Barbara Krammer, Aleksander Sieroń
BACKGROUND: Photodynamic therapy (PDT), eliminates not only the tumor, but also modulates signaling factors release, e.g. vascular endothelial growth factor (VEGF), which plays a crucial role in cancer progression. Assessment of the VEGF-secreting activity of resistant colon cancer cells in different degree of malignancy: SW480 and SW620 under hypoxia-like conditions during δ- aminolevulinic acid (ALA) PDT was the objective of our study. METHODS: The colon cancer cell lines SW480 and SW620 were treated in sublethal doses with ALA PDT in hypoxia- like conditions with cobalt chloride (CoCl2)...
October 24, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29075358/methylation-of-znf331-is-an-independent-prognostic-marker-of-colorectal-cancer-and-promotes-colorectal-cancer-growth
#20
Yuzhu Wang, Tao He, James G Herman, Enqiang Linghu, Yunsheng Yang, François Fuks, Fuyou Zhou, Linjie Song, Mingzhou Guo
BACKGROUND: ZNF331 was reported to be a transcriptional repressor. Methylation of the promoter region of ZNF331 has been found frequently in human esophageal and gastric cancers. The function and methylation status of ZNF331 remain to be elucidated in human colorectal cancer (CRC). METHODS: Six colorectal cancer cell lines, 146 cases of primary colorectal cancer samples, and 10 cases of noncancerous colorectal mucosa were analyzed in this study using the following techniques: methylation specific PCR (MSP), qRT-PCR, siRNA, flow cytometry, xenograft mice, MTT, colony formation, and transfection assays...
2017: Clinical Epigenetics
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