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https://www.readbyqxmd.com/read/28936845/-chemical-constituents-from-pteris-multifida-and-cytotoxic-activity
#1
Yan Zhang, Yu-Sheng Shi, Wen-Zhong Hu, Li-Yan Song, Xiao-Zhong Chen
The materials were extracted by 95% ethanol, and the extracting solution was isolated by kinds of chromatographic columns including polyamide, MCI, preparative MPLC, and preparative HPLC. Eight diterpenes and two sesquiterpenes were isolated from the plant. On analysis of ESI-MS and NMR spectroscopic data, the structures were established as ent-3β-hydroxy-kaur-16-en-19-al (1), 4-epi-kaurenic acid (2), mitrekaurenone (3), 7β,16α,17-trihydroxy-ent-kauran-19-oic acid (4), crotonkinin E (5), crotonkinin F (6), pterisolic acid A (7), pterisolic acid C (8), (2R)-pterosin P (9), and dehydropterosin B (10)...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28926094/curcumin-regulates-proliferation-autophagy-and-apoptosis-in-gastric-cancer-cells-by-affecting-pi3k-and-p53-signaling
#2
Hongbing Fu, Changming Wang, Dejun Yang, Xin Zhang, Ziran Wei, Zhenxin Zhu, Jiapeng Xu, Zunqi Hu, Yu Zhang, Weimin Wang, Ronglin Yan, Qingping Cai
In this study, we aimed to investigate the effects of curcumin on cell activities of gastric cancer (GC), and the connection between curcumin and P53 as well as PI3K signaling. This study was conducted with two cell lines SGC-7901 and BGC-823, both were exposed to curcumin at the concentrations of 0 µM, 10 µM, 20 µM and 40 µM. MTT assay, flow cytometry (FCM) assay, transmission electron microscopy (TEM) were used to study the underlying mechanisms of curcumin in respective of proliferation, apoptosis and autophagy...
September 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28893318/icg-001-suppresses-growth-of-gastric-cancer-cells-and-reduces-chemoresistance-of-cancer-stem-cell-like-population
#3
Yi Liu, Hui Chen, Peiming Zheng, Yingxia Zheng, Qin Luo, Guohua Xie, Yanhui Ma, Lisong Shen
BACKGROUND: ICG-001, a small molecule, binds CREB-binding protein (CBP) to disrupt its interaction with β-catenin and inhibits CBP function as a co-activator of Wnt/β-catenin-mediated transcription. Given its ability to inhibit Wnt/β-catenin signaling pathway, ICG-001 has been used in some tumor types to exert its anticarcinogenic effect. Here, we examined ICG-001 and its potential role as a therapeutic in gastric cancer (GC). METHODS: The gastric cancer cell lines SGC-7901, MGC-803, BGC-823 and MKN-45 were used in vitro and in vivo...
September 11, 2017: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/28882151/retraction-note-astragalus-saponins-affect-proliferation-invasion-and-apoptosis-of-gastric-cancer-bgc-823-cells
#4
Tao Wang, Xiaoyan Xuan, Min Li, Ping Gao, Yuling Zheng, Wenqiao Zang, Guoqiang Zhao
No abstract text is available yet for this article.
September 7, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28881286/synthesis-and-evaluation-of-asymmetric-curcuminoid-analogs-as-potential-anticancer-agents-that-downregulate-nf-%C3%AE%C2%BAb-activation-and-enhance-the-sensitivity-of-gastric-cancer-cell-lines-to-irinotecan-chemotherapy
#5
Peihong Qiu, Shanshan Zhang, Yangyang Zhou, Min Zhu, Yanting Kang, Dahui Chen, Jiabing Wang, Peng Zhou, Wulan Li, Qing Xu, Rong Jin, Jianzhang Wu, Guang Liang
NF-κB is a critical target for cancer treatment due to its central role in facilitating cancer progression and desensitizing cancer cells to chemotherapeutic drugs. In this study, a series of chemically modified asymmetric curcuminoid analogs named S01-S15 were synthesized and evaluated for NF-κB inhibitory activity in gastric cancer cell lines. Cell growth inhibition assays revealed that most of these analogs effectively inhibited the growth of BGC-823, SGC-7901, and MFC cells. S06 was selected for further research...
August 24, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28874475/broad-host-range-expression-reveals-native-and-host-regulatory-elements-that-influence-heterologous-antibiotic-production-in-gram-negative-bacteria
#6
Jia Jia Zhang, Xiaoyu Tang, Michelle Zhang, Darlene Nguyen, Bradley S Moore
Heterologous expression has become a powerful tool for studying microbial biosynthetic gene clusters (BGCs). Here, we extend the transformation-associated recombination cloning and heterologous expression platform for microbial BGCs to include Gram-negative proteobacterial expression hosts. Using a broad-host-range expression platform, we test the implicit assumption that biosynthetic pathways are more successfully expressed in more closely related heterologous hosts. Cloning and expression of the violacein BGC from Pseudoalteromonas luteoviolacea 2ta16 revealed robust production in two proteobacterial hosts, Pseudomonas putida KT2440 and Agrobacterium tumefaciens LBA4404, but very little production of the antibiotic in various laboratory strains of Escherichia coli, despite their closer phylogenetic relationship...
September 5, 2017: MBio
https://www.readbyqxmd.com/read/28864349/insulin-like-growth-factor-binding-protein-1-igfbp-1-upregulated-by-helicobacter-pylori-and-is-associated-with-gastric-cancer-cells-migration
#7
Caifeng Luo, Fengying Sun, Hong Zhu, Ying Ni, Jian Fang, Yun Liu, Shihe Shao, Hongxing Shen, Jianpeng Hu
Insulin-like growth factor binding protein-1 (IGFBP-1), a secreted protein, implicated of various cells in mediating the proliferation, migration, invasion, adhesion, survival and so on. In this study, we assessed the expression and release of IGFBP-1 from gastric cancer cells with H. pylori 26695 infection and the biological functions of IGFBP-1 in gastric cancer cells. The results showed that the expression and release of IGFBP-1 were increased in gastric cancer cells (MGC-803, BGC-823, SGC-7901) infected with H...
August 25, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28860826/mirna-221-of-exosomes-originating-from-bone-marrow-mesenchymal-stem-cells-promotes-oncogenic-activity-in-gastric-cancer
#8
Min Ma, Shilin Chen, Zhuo Liu, Hailong Xie, Hongyu Deng, Song Shang, Xiaohong Wang, Man Xia, Chaohui Zuo
Worldwide, gastric cancer (GC) is one of the deadliest malignant tumors of the digestive system. Moreover, microRNAs (miRNAs) of exosomes harbored within cancer cells have been determined to induce inflammatory conditions that accelerate tumor growth and metastasis. Interestingly, the oncogenic role of bone marrow mesenchymal stem cells (BM-MSCs) in the modulation of immunosuppression, tumor invasion, and metastasis was discovered to be partly mediated through the secretion of exosomes. In this article, high expression of miRNA-221 (miR-221) in exosomes of the peripheral blood was determined to be positively correlated with the poor clinical prognosis of GC, especially with respect to tumor, node, and metastases stage...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28841162/dihydrochalcones-and-diterpenoids-from-pteris-ensiformis-and-their-bioactivities
#9
Yu-Sheng Shi, Yan Zhang, Wen-Zhong Hu, Xiu-Fu Zhang, Xin Fu, Xia Lv
Two new dihydrochalcone enantiomers (+)-1 and (-)-1, along with eight known compounds 3-10, were obtained from Pteris ensiformis. The planar structures were determined on the basis of extensive 1D and 2DNMR and HRESIMS. The resolution of (+)-1 and (-)-1 was achieved by chiral HPLC analysis. The absolute configurations of (+)-1 and (-)-1 were established by the bulkiness rule using Rh₂(O₂CCF₃)₄-induced circular dichroism (ICD) method. Compounds (+)-1, (-)-1, 8, 9 and 10 exhibited the inhibitory assay of NO production in mouse macrophages stimulated by LPS, with IC50 values of 2...
August 25, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28831190/comparative-genomic-and-regulatory-analyses-of-natamycin-production-of-streptomyces-lydicus-a02
#10
Huiling Wu, Weicheng Liu, Lingling Shi, Kaiwei Si, Ting Liu, Dan Dong, Taotao Zhang, Juan Zhao, Dewen Liu, Zhaofeng Tian, Yuesen Yue, Hong Zhang, Bai Xuelian, Yong Liang
Streptomyces lydicus A02 is used by industry because it has a higher natamycin-producing capacity than the reference strain S. natalensis ATCC 27448. We sequenced the complete genome of A02 using next-generation sequencing platforms, and to achieve better sequence coverage and genome assembly, we utilized single-molecule real-time (SMRT) sequencing. The assembled genome comprises a 9,307,519-bp linear chromosome with a GC content of 70.67%, and contained 8,888 predicted genes. Comparative genomics and natamycin biosynthetic gene cluster (BGC) analysis showed that BGC are highly conserved among evolutionarily diverse strains, and they also shared closer genome evolution compared with other Streptomyces species...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811688/genetic-variation-in-cd166-gene-and-its-association-with-bladder-cancer-risk-in-north-indian-population
#11
Archana Verma, Rakesh Kapoor, Rama Devi Mittal
Adhesion molecules play a key role in cancer progression and tumorigenesis. Genetic polymorphism of adhesion molecules may alter the normal functioning thereby leading to bladder cancer susceptibility. Hence we aimed to evaluate three SNPs of CD166 gene (CD166rs6437585 C/T, CD166rs10511244 C/T, and CD166rs1157 A/G) in bladder cancer patients and normal controls of North Indian population. A total of 270 healthy controls and 240 confirmed bladder cancer patients were recruited for this study. Three SNPs of CD166 gene viz...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28810654/roles-of-p38-and-jnk-protein-kinase-pathways-activated-by-compound-cantharidin-capsules-containing-serum-on-proliferation-inhibition-and-apoptosis-of-human-gastric-cancer-cell-line
#12
Yonghao Sun, Dejuan Zhang, Mao Mao, Yangping Lu, Ning Jiao
The aim of the present study was to investigate the inhibitory effect of compound cantharides capsules (CCCs) on the viability and apoptosis of human gastric cancer cell lines, BGC-823 and SGC-7901, and to detect its regulation of gene expression levels, as well as its inhibition mechanisms. Each cell line was grouped into a control group, CCC serum group, 5-fluorouracil (5-FU) group, combination therapy group (CCC serum + 5-FU) and serum control group. Growth curves were measured and flow cytometry was used to detect cell apoptosis and cell viability...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28768242/slc3a2-antigen-of-mab-3g9-promotes-migration-and-invasion-by-upregulating-of-mucins-in-gastric-cancer
#13
Shanshan Wang, Haibo Han, Ying Hu, Wei Yang, Yunwei Lv, Limin Wang, Lianhai Zhang, Jiafu Ji
Solute carrier family 3 member 2 (SLC3A2) has been reported to be highly expressed in a variety of carcinomas. However, the function of SLC3A2 in gastric carcinoma (GC) has not been well explored. Monoclonal antibody (mAb) 3G9, generated from immunogen of various human GC cell lines, has been shown to bind to GC tissues specifically. In this study, we identified the target antigen of mAb 3G9 as SLC3A2, and detected the expression profile of SLC3A2 in a panel of gastric cancer cell lines and GC tumor tissues...
July 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28764915/cytotoxic-oleanane-triterpenoid-saponins-from-albizia-julibrissin
#14
Qinghua Han, Yi Qian, Xuda Wang, Qingying Zhang, Jingrong Cui, Pengfei Tu, Hong Liang
Bioassay-guided fractionation of the ethanolic extract of the stem bark of Albizia julibrissin led to the isolation of ten new oleanane-type triterpenoid saponins, julibrosides J37-J46 (1-10), along with six known analogues (11-16). In addition, 11 prosapogenins (17-27) were prepared by mild or strong alkaline hydrolysis of the total saponin. The structures of 1-27 were determined by spectroscopic and chemical means, and their cytotoxicities against four human cancer cell lines, BGC-823, A549, HCT-116, and HepG2 were evaluated...
July 29, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28759561/regenerating-family-member-4-reg4-enhances-5-fluorouracil-resistance-of-gastric-cancer-through-activating-mapk-erk-bim-signaling-pathway
#15
Jiaoyue Jin, Hang Lv, Junzhou Wu, Dan Li, Kaiyan Chen, Fanrong Zhang, Jing Han, Jianguo Feng, Nan Zhang, Herbert Yu, Dan Su, Lisha Ying
BACKGROUND Reg4, a member of the Reg multigene family, is highly upregulated in many gastrointestinal cancers including gastric cancer (GC). The enhanced expression of Reg4 is associated with the resistance of GC to 5-fluorouracil (5-FU), while the underlying mechanism is not clear. The aim of the present study was to explore the resistant mechanism underlying 5-FU resistance. MATERIAL AND METHODS Reg4 expression was assessed by Western blot analysis for SGC-7901, BGC-823, AGS, MKN28, and MKN45. Synthetic short single strand RNA oligonucleotides and Flag-Reg4 plasmid were used to investigate the biological function of Reg4 in vitro...
July 31, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28757064/synthesis-and-anti-tumor-evaluation-of-panaxadiol-halogen-derivatives
#16
Shengnan Xiao, Shuai Chen, Yuanyuan Sun, Wuxi Zhou, Huri Piao, Yuqing Zhao
In the current work, 13 novel panaxadiol (PD) derivatives were synthesized by reacting with chloroacetyl chloride and bromoacetyl bromide. Their in vitro antitumor activities were evaluated on three human tumor cell lines (HCT-116, BGC-823, SW-480) and three normal cells (human gastric epithelial cell line-GES-1, hair follicle dermal papilla cell line-HHDPC and rat myocardial cell line-H9C2) by MTT assay. Compared with PD, the results demonstrated that compound 1e, 2d, 2e showed significant anti-tumor activity against three tumor cell lines, the IC50 value of compound 2d against HCT-116 was the lowest (3...
September 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28754806/impact-of-balloon-guide-catheter-on-technical-and-clinical-outcomes-a-systematic-review-and-meta-analysis
#17
Waleed Brinjikji, Robert M Starke, M Hassan Murad, David Fiorella, Vitor M Pereira, Mayank Goyal, David F Kallmes
BACKGROUND AND PURPOSE: Flow arrest with balloon guide catheters (BGCs) is becoming increasingly recognized as critical to optimizing patient outcomes for mechanical thrombectomy. We performed a systematic review and meta-analysis of the literature for studies that compared angiographic and clinical outcomes for patients who underwent mechanical thrombectomy with and without BGCs. MATERIALS AND METHODS: In April 2017 a literature search on BGC and mechanical thrombectomy for stroke was performed...
July 28, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28752948/genomic-insights-into-specialized-metabolism-in-the-marine-actinomycete-salinispora
#18
Anne-Catrin Letzel, Jing Li, Gregory C A Amos, Natalie Millán-Aguiñaga, Joape Ginigini, Usama R Abdelmohsen, Susana P Gaudêncio, Nadine Ziemert, Bradley S Moore, Paul R Jensen
Comparative genomics is providing new opportunities to address the diversity and distributions of genes encoding the biosynthesis of specialized metabolites. An analysis of 119 genome sequences representing three closely related species of the marine actinomycete genus Salinispora reveals extraordinary biosynthetic diversity in the form of 176 distinct biosynthetic gene clusters (BGCs) of which only 24 have been linked to their products. Remarkably, more than half of the BGCs were observed in only one or two strains, suggesting they were acquired relatively recently in the evolutionary history of the genus...
September 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28751619/dysregulated-lncrna-uca1-contributes-to-the-progression-of-gastric-cancer-through-regulation-of-the-pi3k-akt-mtor-signaling-pathway
#19
Chengyun Li, Geyu Liang, Sheng Yang, Jing Sui, Wenzhuo Yao, Xian Shen, Yanqiu Zhang, Hui Peng, Weiwei Hong, Siyi Xu, Wenjuan Wu, Yancheng Ye, Zhiyi Zhang, Wenhua Zhang, Lihong Yin, Yuepu Pu
The long non-coding RNA (lncRNA) urothelial carcinoma-associated 1 (UCA1) has been recently shown to be dysregulated during disease occurrence and to play an important role in the progression of several cancers. However, the biological role and potential regulation mechanism of UCA1 in the carcinogenesis of gastric cancer remain unclear. In the present study, we found that UCA1 was aberrantly upregulated in gastric cancer tissues and gastric cancer cell lines, and was associated with TNM stage and metastasis...
July 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28739730/comparison-of-different-muscle-relaxant-anesthetics-on-growth-migration-and-invasion-of-gastric-cancer-cells
#20
COMPARATIVE STUDY
Aihua Jiang, Huishan Zhao, Xiaofei Liu, Mingwei Yu, Jian Chen, Wen G Jiang
BACKGROUND/AIM: Muscle relaxants, also known as neuromuscular blocking agents, can block nerve impulses to the muscles and are always used in surgery for general anesthesia. However, the effect of muscle-relaxant anesthetics on cell activity in gastric cancer is currently unknown. The present study aimed to examine and compare the role of three different muscle-relaxant anesthetics in gastric cancer cells. MATERIALS AND METHODS: Gastric cancer cells (SGC7901 and BGC 823) were treated with a different dose of muscle-relaxant anesthetics, Rocuronium bromide (Rb), Vecuronium bromide (Vb) and Cisatracurium Besilate (CB)...
August 2017: Anticancer Research
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