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https://read.qxmd.com/read/30775805/effects-of-srsf1-on-subnuclear-localization-of-topoisomerase-i
#1
Agnieszka Girstun, Takao Ishikawa, Krzysztof Staron
Subnuclear localization of topoisomerase I (top I) is determined by its DNA relaxation activity and a net of its interactions with in majority unidentified nucleolar and nucleoplasmic elements. Here, we recognized SR protein SRSF1 (Serine/arginine-rich splicing factor 1, previously known as SF2/ASF) as a new element of the net. In HeLa cells, overexpression of SRSF1 recruited top I to the nucleoplasm whereas its silencing concentrated it in the nucleolus. Effect of SRSF1 was independent of top I relaxation activity and was the best pronounced for the mutant inactive in relaxation reaction...
February 18, 2019: Journal of Cellular Biochemistry
https://read.qxmd.com/read/30773944/celastrol-suppresses-nitric-oxide-synthases-and-the-angiogenesis-pathway-in-colorectal-cancer
#2
Yanfeng Gao, Shuang Zhou, Lizhi Pang, Juechen Yang, Han John Li, Xiongwei Huo, Steven Y Qian
The thunder god vine (Tripterygium wilfordii Hook. F) is traditionally used for inflammation-related diseases in traditional Chinese medicine. In recent years, celastrol (a natural compound from the root of the thunder god vine) has attracted great interest for its potential anticancer activities. The free radical nitric oxide (NO) is known to play a critical role in colorectal cancer growth by promoting tumour angiogenesis. However, how celastrol influences the NO pathway and its mechanism against colorectal cancer is largely unknown...
February 18, 2019: Free Radical Research
https://read.qxmd.com/read/30770794/mir-451a-suppressing-bap31-can-inhibit-proliferation-and-increase-apoptosis-through-inducing-er-stress-in-colorectal-cancer
#3
Ke Xu, Bin Han, Yang Bai, Xiu-Ying Ma, Zhen-Ni Ji, Yao Xiong, Shi-Kun Miao, Yuan-Yuan Zhang, Li-Ming Zhou
The global morbidity and mortality of colorectal cancer (CRC) are ranked the third among gastrointestinal tumors in the world. MiR-451a is associated with several types of cancer, including CRC. However, the roles and mechanisms of miR-451a in CRC have not been elucidated. BAP31 is a predicted target gene of miR-451a in our suppression subtractive hybridization library. Its relationship with miR-451a and function in CRC are unclear. We hypothesized that miR-451a could induce apoptosis through suppressing BAP31 in CRC...
February 15, 2019: Cell Death & Disease
https://read.qxmd.com/read/30766866/a-novel-small-molecule-p53-stabilizer-for-brain-cell-differentiation
#4
Joana D Amaral, Dário Silva, Cecília M P Rodrigues, Susana Solá, Maria M M Santos
Brain tumor, as any type of cancer, is assumed to be sustained by a small subpopulation of stem-like cells with distinctive properties that allow them to survive conventional therapies and drive tumor recurrence. Thus, the identification of new molecules capable of controlling stemness properties may be key in developing effective therapeutic strategies for cancer by inducing stem-like cells differentiation. Spiropyrazoline oxindoles have previously been shown to induce apoptosis and cell cycle arrest, as well as upregulate p53 steady-state levels, while decreasing its main inhibitor MDM2 in the HCT116 human colorectal carcinoma cell line...
2019: Frontiers in Chemistry
https://read.qxmd.com/read/30765814/metformin-inhibits-lithocholic-acid-induced-interleukin-8-upregulation-in-colorectal-cancer-cells-by-suppressing-ros-production-and-nf-kb-activity
#5
Thi Thinh Nguyen, Trong Thuan Ung, Shinan Li, Sen Lian, Yong Xia, Sun Young Park, Young Do Jung
Metformin, an inexpensive, well-tolerated oral agent that is a commonly used first-line treatment for type 2 diabetes, has become the focus of intense research as a potential anticancer agent. In this study, we describe the inhibitory effect of metformin in interleukin 8 (IL-8) upregulation by lithocholic acid (LCA) in HCT116 colorectal cancer (CRC) cells. Pharmacological inhibition studies indicated that reactive oxygen species (ROS) were involved in LCA-induced IL-8 upregulation through activation of the transcription factor NF-κB...
February 14, 2019: Scientific Reports
https://read.qxmd.com/read/30763719/antiproliferative-ent-kaurane-diterpenoids-isolated-from-the-roots-of-zea-mays-l
#6
Andong Wang, Yanhua Fan, Qing Ouyang, Chengcheng Fan, Bin Lin, Jianyu Liu, Yongnan Xu
Four new ent-kaurane diterpenoid maizediterpenes A-D (1-4), along with fourteen known compounds were isolated from the roots of Zea mays (maize). Compounds 7, 15, 16 were isolated from this genus for the first time. The planar structures of the new compounds were determined by extensive analysis of their NMR and HR-ESI-MS spectra, and the absolute configurations were established on the basis of specific rotation in association with calculated ECD spectra. Compounds 2, 6 and 18 showed significant antiproliferative effects against five human cancer cell lines (A549, MDA-MB-231, SK-Hep-1, SNU638, HCT116) with IC50 values ranging from 1...
February 11, 2019: Fitoterapia
https://read.qxmd.com/read/30763684/crocus-sativus-by-products-as-sources-of-bioactive-extracts-pharmacological-and-toxicological-focus-on-anthers
#7
Giuseppe Chichiriccò, Claudio Ferrante, Luigi Menghini, Lucia Recinella, Sheila Leone, Annalisa Chiavaroli, Luigi Brunetti, Simonetta Di Simone, Maurizio Ronci, Pierpaolo Piccone, Barbara Lanza, Stefania Cesa, Annamaria Poma, Giulia Vecchiotti, Giustino Orlando
Multiple studies revealed the potential application of high quality saffron byproducts as cheap sources of bioactive compounds endowed with antioxidant activity. In the present study, we analyzed the total fatty acids of the anthers, and explored the pharmacological and toxicological potential of anthers, by evaluating genotoxic and protective effects in multiple cell lines, brine shrimps and isolated rat tissues. The phytochemical analyses showed that anthers are rich in long chain fatty acids most of which are unsaturated (80...
February 11, 2019: Food and Chemical Toxicology
https://read.qxmd.com/read/30760703/subverted-regulation-of-nox1-nadph-oxidase-dependent-oxidant-generation-by-protein-disulfide-isomerase-a1-in-colon-carcinoma-cells-with-overactivated-kras
#8
Tiphany Coralie De Bessa, Alessandra Pagano, Ana Iochabel Soares Moretti, Percillia Victoria Santos Oliveira, Samir Andrade Mendonça, Herve Kovacic, Francisco Rafael Martins Laurindo
Protein disulfide isomerases including PDIA1 are implicated in cancer progression, but underlying mechanisms are unclear. PDIA1 is known to support vascular Nox1 NADPH oxidase expression/activation. Since deregulated reactive oxygen species (ROS) production underlies tumor growth, we proposed that PDIA1 is an upstream regulator of tumor-associated ROS. We focused on colorectal cancer (CRC) with distinct KRas activation levels. Analysis of RNAseq databanks and direct validation indicated enhanced PDIA1 expression in CRC with constitutive high (HCT116) vs...
February 13, 2019: Cell Death & Disease
https://read.qxmd.com/read/30753097/radiation-induced-dna-damage-response-and-resistance-in-colorectal-cancer-stem-like-cells
#9
Kumari Anuja, Amit Roy Chowdhury, Arka Saha, Souvick Roy, Arabinda Kumar Rath, Madhabananda Kar, Birendranath Banerjee
PURPOSE: Radiation therapy is an integral part of current treatment modality for colorectal cancer. Recent studies have revealed the presence of cancer stem-like cells (CSCs) population, in different tumors are responsible for therapeutic resistance and disease relapse, including colorectal cancer with poorer survival rate. Hence, characterization of effect of Ionizing Radiation (IR) in colorectal cancer may serve to explain possible mechanisms. MATERIAL AND METHODS: Parental HCT116 and HCT-15cells and derived clonospheres were irradiated and dose was optimized based on cell survival assay and cell cycle analysis...
February 12, 2019: International Journal of Radiation Biology
https://read.qxmd.com/read/30747070/novel-pyrazolo-4-3-c-quinolin-3-one-derivatives-as-pde5a-inhibitors
#10
Althaf Shaik, Harshit Kumar Agarwal, Rashmi Bhakuni, Sivapriya Kirubakaran
PDE5A is a phosphodiesterase which specifically hydrolyzes the cGMP to GMP. PDE5A takes part in several physiological and pathological pathways and is considered an important drug target. Currently, PDE5 inhibitors (ex; Sildenafil, Tadalafil) available in the market are not only being used for the treatment of erectile dysfunction but at the same time, they are also in the clinical trials being investigated as anticancer agents. In this work, we have examined pyrazolo [4,3-c]quinolin-3-ones as PDE5A inhibitors...
February 8, 2019: Current Topics in Medicinal Chemistry
https://read.qxmd.com/read/30745832/polydatin-increases-radiosensitivity-by-inducing-apoptosis-of-stem-cells-in-colorectal-cancer
#11
Qiu Chen, Ya-Nan Zeng, Ke Zhang, Ying Zhao, Yong-You Wu, Gen Li, Hui-Ying Cheng, Meng Zhang, Feng Lai, Jin-Bing Wang, Feng-Mei Cui
This study aimed to investigate the radiosensitizing effect of polydatin (PD) on colorectal cancer (CRC) and its underlying mechanism. The C57BL/6 mouse model of CRC was induced by treatment with azoxymethane (AOM)/dextran sodium sulfate (DSS) and then divided into four groups: control, PD alone, IR alone, and combination of PD and IR. Radiation therapy (200 cGy/min, 10Gy) was performed in mice in the experimental groups for once a week with a total of four times. Thirty minutes before IR, mice were intraperitoneally injected with PD at the dose of 25mg/kg...
2019: International Journal of Biological Sciences
https://read.qxmd.com/read/30745798/antarctic-freshwater-microalga-chloromonas-reticulata-suppresses-inflammation-and-carcinogenesis
#12
Sung-Suk Suh, Ju-Mi Hong, Eun Jae Kim, Seung Won Jung, Hyunsik Chae, Jung Eun Kim, Ji Hee Kim, Il-Chan Kim, Sanghee Kim
Inflammation triggered by the innate immune system is a strategy to protect organisms from the risk of environmental infection. However, it has recently become clear that inflammation can cause a variety of human diseases, including cancer. In this study, we investigated the effects of an ethanol extract of the Antarctic freshwater microalgae, Chloromonas reticulata (ETCH), on inflammation and carcinogenesis in RAW 264.7 macrophages and HCT116 human colon cancer cells, respectively. ETCH exhibited significant anti-inflammatory activity through the dose-dependent modulation of major inflammatory markers such as COX-2, IL-6, iNOS, TNF-α, and NO production...
2019: International Journal of Medical Sciences
https://read.qxmd.com/read/30741292/non-volatile-pungent-compounds-isolated-from-zingiber-officinale-and-their-mechanisms-of-action
#13
Dabo Pan, Chen Zeng, Weiyang Zhang, Ting Li, Zifei Qin, Xiaojun Yao, Yi Dai, Zhihong Yao, Yang Yu, Xinsheng Yao
In this study, an efficient strategy developed by integrating UPLC-Q/TOF-MS, network pharmacology, and molecular simulation, was proposed and applied for rapidly screening bioactive candidates from ginger. A UPLC-Q/TOF MS-guided isolation targeting non-volatile pungent compounds resulted in the isolation and identification of 19 compounds in the rhizome of Zingiber officinale, including six new compounds (1-6). Based on target prediction and Gene Ontology (GO), the primary biological function of compounds was predicted to be associated with cancer and the key target was VEGFR2 (vascular endothelial growth factor receptor 2)...
February 11, 2019: Food & Function
https://read.qxmd.com/read/30738076/induced-production-of-steroids-by-co-cultivation-of-two-endophytes-from-mahonia-fortunei
#14
Zi-Ru Wang, Gang Li, Li-Xia Ji, Hang-Hang Wang, Han Gao, Xiao-Ping Peng, Hong-Xiang Lou
A new ergosterol derivative, 23R-hydroxy-(20Z,24R)-ergosta-4,6,8(14),20(22)-tetraen-3-one (1), and a biosynthetically related known compound, (22E,24R)-ergosta-4,6,8(14),22-tetraen-3-one (2), were isolated from the co-culture between endophytic fungus Pleosporales sp. F46 and endophytic bacterium Bacillus wiedmannii Com1 both inhibiting in the medicinal plant Mahonia fortunei. The structure of the new compound 1 was determined by extensive spectroscopic analysis using HRMS and NMR, together with the modified Mosher's ester method...
February 6, 2019: Steroids
https://read.qxmd.com/read/30733856/growth-inhibition-and-apoptosis-in-colorectal-cancer-cells-induced-by-vitamin-d-nanoemulsion-nvd-involvement-of-wnt-%C3%AE-catenin-and-other-signal-transduction-pathways
#15
Suhail Razak, Tayyaba Afsar, Ali Almajwal, Iftikhar Alam, Sarwat Jahan
Background: More than the two decades, the question of whether vitamin D has a role in cancer frequency, development, and death has been premeditated in detail. Colorectal, breast, and prostate cancers have been a scrupulous spot of center, altogether, these three malignancies report for approximately 35% of cancer cases and 20% of cancer demises in the United States, and as such are a chief public health apprehension. The aim was to evaluate antitumor activity of Vitamin D-Nanoemulsion (NVD) in colorectal cancer cell lines and HCT116 xenograft model in a comprehensive approach...
2019: Cell & Bioscience
https://read.qxmd.com/read/30733494/in-vitro-culture-with-gemcitabine-augments-death-receptor-and-nkg2d-ligand-expression-on-tumour-cells
#16
Andrew M Gravett, Angus G Dalgleish, John Copier
Much effort has been made to try to understand the relationship between chemotherapeutic treatment of cancer and the immune system. Whereas much of that focus has been on the direct effect of chemotherapy drugs on immune cells and the release of antigens and danger signals by malignant cells killed by chemotherapy, the effect of chemotherapy on cells surviving treatment has often been overlooked. In the present study, tumour cell lines: A549 (lung), HCT116 (colon) and MCF-7 (breast), were treated with various concentrations of the chemotherapeutic drugs cyclophosphamide, gemcitabine (GEM) and oxaliplatin (OXP) for 24 hours in vitro...
February 7, 2019: Scientific Reports
https://read.qxmd.com/read/30732795/triggered-doxorubicin-release-using-redox-sensitive-hyaluronic-acid-g-stearic-acid-micelles-for-targeted-cancer-therapy
#17
Gyeong-Won Jeong, Young-Il Jeong, Jae-Woon Nah
To develop a carrier for targeted drug delivery and triggered drug release in a reducing-tumor environment, reduction-sensitive hyaluronic acid-g-stearic acid (HCS) micelles were synthesized using a coupling agent. The HCS 40% was shown to have a more compact particle size than HCS 20% and the particle size of doxorubicin (DOX)-loaded HCS (HCSD) was increased relative to that of HCS micelles. The behavior of DOX release from HCSD showed that DOX was rapidly released in GSH (10 mM) solution. The site-specific targeting effect of HCSD nanoparticles was investigated by cellular uptake and competition assay at HCT116 and CT26 cell lines...
April 1, 2019: Carbohydrate Polymers
https://read.qxmd.com/read/30724591/chemical-composition-antioxidant-and-antiproliferative-activities-of-essential-oil-from-rhizome-and-leaves-of-curcuma-mutabilis-%C3%A5-korni%C3%A4-k-m-sabu-prasanthk-endemic-to-western-ghats-of-india
#18
T Soumya, P R Jayasree, M Deepak, P R Manish Kumar
Hydro-distilled essential oils, from fresh rhizomes and leaves of Curcuma mutabilis Škorničk., M.Sabu & Prasanthk., characterized by GC-MS revealed the presence of thirty three and twenty three compounds therein respectively. Whilst estrone methyl ether (3-Methoxyestra-1,3,5(10)-trien-17-one) was the major component in rhizome oil (47.35%), sesquiterpene hydrocarbons predominated as the major group (63.92%) in leaf oil with a higher preponderance of β-caryophyllene (25.48%), β-farnesene (19.47%) and α-humulene (11...
February 6, 2019: Natural Product Research
https://read.qxmd.com/read/30720071/mutation-of-idh1-aggravates-the-fatty-acid%C3%A2-induced-oxidative-stress-in-hct116-cells-by-affecting-the-mitochondrial-respiratory-chain
#19
Sheng Li, Chao Sun, Yu Gu, Xing Gao, Yuanlin Zhao, Yuan Yuan, Feng Zhang, Peizhen Hu, Weihua Liang, Kaiyu Cao, Jin Zhang, Zhe Wang, Jing Ye
Increasing evidence has indicated that mutations of isocitrate dehydrogenase 1/2 (IDH1/2) contribute to the metabolic reprogramming of cancer cells; however their functions in lipid metabolism remain unknown. In the present study, the parental and IDH1 (R132H/+) mutant HCT116 cells were treated with various concentrations of oleic acid (OA) or palmitic acid (PA) in the presence or absence of glucose. The results demonstrated that mutation of IDH1 exacerbated the effects of OA and PA on cell viability and apoptosis, and consistently elevated the production of reactive oxygen species in HCT116 cells, particularly in the absence of glucose...
January 28, 2019: Molecular Medicine Reports
https://read.qxmd.com/read/30719773/anti-colorectal-cancer-targets-of-resveratrol-and-biological-molecular-mechanism-analyses-of-network-pharmacology-human-and-experimental-data
#20
Rong Li, Xiuying Ma, Yingqi Song, Yuanyuan Zhang, Wenbi Xiong, Li Li, Liming Zhou
In this study, colorectal cancer (CRC)-diseased targets and resveratrol (Res)-associated targets were combined and constructed by the use of grouped databases for identification of the predicted targets. After production of target-functional protein interaction network of Res anti-CRC, the topological analysis was used to create the core targets of Res anti-CRC. All core targets performed the analyses of biological function and pathway enrichment to optimize the biological processes and key signaling pathways of Res anti-CRC...
February 5, 2019: Journal of Cellular Biochemistry
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