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https://www.readbyqxmd.com/read/28431473/structures-and-bioactivities-of-seven-flavonoids-from-osmanthus-fragrans-jinqiu-essential-oil-extraction-residues
#1
Jiang-Lian Zhou, Xian-Ying Fang, Jing-Qiu Wang, Lin-Guo Zhao, Yi Li, Feng Tang, Yong-De Yue
Osmanthus fragrans are well-known for their fragrance, but it is wasteful if to discard O. fragrans flower after extracting their essential oils. In this paper, we found that O. fragrans flower residues were rich in flavonoids. Six flavonoids and one phenylethanoid glycoside were isolated from the ethanol extract of O. fragrans flower residues, identified as quercetin (1), rutin (2), verbascoside (3), genistin (4), kaempferol (5), isorhamnetin (6) and naringin (7). In bioactivity study, kaempferol (IC50 = 1...
April 21, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28420236/human-hepatocarcinoma-cell-targeting-by-glypican-3-ligand-peptide-functionalized-silica-nanoparticles-implications-for-ultrasound-molecular-imaging
#2
Marco Di Paola, Alessandra Quarta, Francesco Conversano, Enzo Antonio Sbenaglia, Simona Bettini, Ludovico Valli, Giuseppe Gigli, Sergio Casciaro
Silica nanoparticles (SiNPs) are widely studied nanomaterials for their potential employment in advanced biomedical applications, like selective molecular imaging and targeted drug delivery. SiNPs are generally low cost and high biocompatible, can be easily functionalized with a wide variety of functional ligands and have been demonstrated to be effective in enhancing ultrasound contrast at clinical diagnostic frequencies. Therefore, SiNPs might be used as contrast agents in echographic imaging. In this work, we have developed a SiNPs-based system for the in vitro molecular imaging of hepatocellular carcinoma cells that express high levels of Glypican-3 protein (GPC-3) on their surface...
April 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28418776/7-glutathione-pyrrole-and-7-cysteine-pyrrole-are-potential-carcinogenic-metabolites-of-pyrrolizidine-alkaloids
#3
Xiaobo He, Qingsu Xia, Peter P Fu
Many pyrrolizidine alkaloids (PAs) are hepatotoxic, genotoxic, and carcinogenic phytochemicals. Metabolism of PAs in vivo generates four (±)-6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizine (DHP)-DNA adducts that have been proposed to be responsible for PA-induced liver tumor formation in rats. In this present study, we determined that the same set of DHP-DNA adducts was formed upon the incubation of 7-glutathione-DHP and 7-cysteine-DHP with cultured human hepatocarcinoma HepG2 cells. These results suggest that 7-glutathione-DHP and 7-cysteine-DHP are reactive metabolites of PAs that can bind to cellular DNA to form DHP-DNA adducts in HepG2 cells, and can potentially initiate liver tumor formation...
March 1, 2017: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/28398025/hepatocarcinoma-genetic-and-epigenetic-features
#4
Angela Lombardi, Anna Grimaldi, Silvia Zappavigna, Gabriella Misso, Michele Caraglia
HCC is the third leading cause of cancer-related deaths worldwide, accounting for about 1 million deaths annually. The incidence of HCC is highest in Asia and Africa, where the endemic high prevalence of hepatitis B and hepatitis C strongly predisposes to the development of chronic liver disease and subsequent development of HCC. Patients with HCC generally present at an advanced stage due to compensated cirrhosis defined by the absence of pathognomonic symptoms, resulting in death within 6 to 20 months, suggesting an urgent need in treatment modalities that will dramatically decrease the mortality rate of HCC...
April 11, 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28388330/yellow-fever-virus-modulates-the-expression-of-key-proteins-related-to-the-microrna-pathway-in-the-human-hepatocarcinoma-cell-line-hepg2
#5
Gustavo Moraes Holanda, Samir Mansour Moraes Casseb, Karla Fabiane Lopes Mello, Pedro Fernando Costa Vasconcelos, Ana Cecília Ribeiro Cruz
Yellow fever is a zoonotic disease caused by the yellow fever virus (YFV) and transmitted by mosquitoes of the family Culicidae. It is well known that cellular and viral microRNAs (miRNAs) are involved in modulation of viral and cellular gene expression, as well as immune response, and are considered by the scientific community as possible targets for an effective therapy against viral infections. This regulation may be involved in different levels of infection and clinical symptomatology. We used viral titration techniques, viral kinetics from 24 to 96 hours postinfection (hpi), and analyzed the expression of key proteins related to the miRNA pathway by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR)...
April 7, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28382160/sensitive-detection-of-protein-biomarkers-using-silver-nanoparticles-enhanced-immunofluorescence-assay
#6
Li-Jun Zhao, Ru-Jia Yu, Wei Ma, Huan-Xing Han, He Tian, Ruo-Can Qian, Yi-Tao Long
Detection of biomarkers is extremely important for the early diagnosis of diseases. Here, we developed an easy and highly sensitive fluorescence detection system for the determination of biomarkers by combining the rapid separation of magnetic beads and silver nanoparticles labeled antibodies. An ultrasensitive silver ions fluorescence probe 3', 6'-bis (diethylamino)-2-(2-iodoethyl) spiro[isoindoline-1, 9'-xanthen]-3-one (Ag(+)-FP) was applied to immunoassay. A significant signal amplification was achieved as the AgNPs can be dissolved by H2O2 and generate numerous Ag(+), which would turn "on" the fluorescence of Ag(+)-FP...
2017: Theranostics
https://www.readbyqxmd.com/read/28381351/dihydromyricetin-induces-mitochondria-mediated-apoptosis-in-hepg2-cells-through-down-regulation-of-the-akt-bad-pathway
#7
Zhuangwei Zhang, Huiqin Zhang, Shiyong Chen, Yan Xu, Anjun Yao, Qi Liao, Liyuan Han, Zuquan Zou, Xiaohong Zhang
The plant flavonol dihydromyricetin (DHM) was reported to induce apoptosis in human hepatocarcinoma HepG2 cells. This study was undertaken to elucidate the underlying molecular mechanism of action of DHM. In the study, DHM down-regulated Akt expression and its phosphorylation at Ser473, up-regulated the levels of mitochondrial proapoptotic proteins Bax and Bad, and inhibited the phosphorylation of Bad at Ser136 and Ser112. It also inhibited the expression of the antiapoptotic protein Bcl-2 and enhanced the cleavage and activation of caspase-3 as well as the degradation of its downstream target poly(ADP-ribose) polymerase...
February 2017: Nutrition Research
https://www.readbyqxmd.com/read/28381162/peroxisome-proliferator-activated-receptor-gamma-coactivator-1-alpha-acts-as-a-tumor-suppressor-in-hepatocellular-carcinoma
#8
Rui Liu, Haiyang Zhang, Yan Zhang, Shuang Li, Xinyi Wang, Xia Wang, Cheng Wang, Bin Liu, Ke Zen, Chen-Yu Zhang, Chunni Zhang, Yi Ba
Peroxisome proliferator-activated receptor gamma coactivator-1 alpha plays a crucial role in regulating the biosynthesis of mitochondria, which is closely linked to the energy metabolism in various tumors. This study investigated the regulatory role of peroxisome proliferator-activated receptor gamma coactivator-1 alpha in the pathogenesis of hepatocellular carcinoma. In this study, the changes of peroxisome proliferator-activated receptor gamma coactivator-1 alpha messenger RNA levels between normal human liver and hepatocellular carcinoma tissue were examined by quantitative reverse transcription polymerase chain reaction...
April 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28368406/transcription-factor-spz1-promotes-twist-mediated-epithelial-mesenchymal-transition-and-oncogenesis-in-human-liver-cancer
#9
L-T Wang, S-S Chiou, C-Y Chai, E Hsi, C-M Chiang, S-K Huang, S-N Wang, K K Yokoyama, S-H Hsu
The epithelial-mesenchymal transition (EMT) is an important process in the progression of cancer. However, its occurrence and mechanism of regulation are not fully understood. We propose a regulatory pathway in which spermatogenic leucine zipper 1 (SPZ1) promotes EMT through its transactivating ability in increasing TWIST1 expression. We compared the expression of SPZ1 and TWIST1 in specimens of hepatocarcinoma cells (HCCs) and non-HCCs. Expression of SPZ1 exhibited a tumor-specific expression pattern and a high correlation with patients' survival time, tumor size, tumor number and progression stage...
April 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28363167/emodin-targets-mitochondrial-cyclophilin-d-to-induce-apoptosis-in-hepg2-cells
#10
Ling Zhang, Dian He, Kun Li, Hongli Liu, Baitao Wang, Lifang Zheng, Jiazhong Li
Emodin has demonstrated potent anticancer activity in human hepatocarcinoma cells and animal models, however, the cellular targets of emodin have not been fully defined. Here we report that emodin induces the dysfunction of mitochondria and the apoptosis in HepG2 cells through an enrichment in mitochondria. Specifically, A mitochondrial matrix protein (cyclophilin D, CyPD) is involved in emodin-induced apoptosis, and the inhibitor of CyPD (cyclosporin A) could almost completely suppressing the apoptosis; Moreover, as the expression of CyPD could be effectively inhibited by antioxidant N-acetyl-l-cysteine and epidermal growth factor (the activator of ERK), reactive oxygen species and ERK might be involved in the relevant role of CyPD...
March 28, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28358339/novel-palladium-ii-complexes-that-influence-prominin-1-cd133-expression-and-stem-cell-factor-release-in-tumor-cells
#11
Eva Fischer-Fodor, Roman Mikláš, Lucia Rišiaňová, Mihai Cenariu, Ioana-Georgeta Grosu, Piroska Virag, Maria Perde-Schrepler, Ciprian Tomuleasa, Ioana Berindan-Neagoe, Ferdinand Devínsky, Natalia Miklášová
New Pd(II) complexes of 1,7-bis(2-methoxyphenyl)hepta-1,6-diene-3,5-dione were synthesized and structurally characterized. The complexes were tested in vitro on human colon and hepatic carcinoma cell lines, normal hepatic cells and hematopoietic progenitor cells. Biological tests proved that Pd(II) complexes 1 and 2 (containing a curcumin derivative) exhibit a strong in vitro antitumor effect against the cells derived from human colorectal carcinoma and the hepatic metastasis of a colorectal carcinoma. Complex 1 has an outstanding inhibitory effect against BRAF-mutant colon carcinoma and hepatocarcinoma cell growth; 1 and 2 are both more active than the free ligand and have the capacity to trigger early apoptotic processes...
March 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28356957/autophagy-impacts-on-oxaliplatin-induced-hepatocarcinoma-apoptosis-via-the-il-17-il-17r-jak2-stat3-signaling-pathway
#12
Jinghua Wu, Jiapei Guo, Qing Cao, Yi Wang, Junmao Chen, Zhigang Wang, Zhiyong Yuan
The interleukin (IL)-17/IL-17 receptor (IL-17R) complex has been shown to be important for the regulation of inflammation; however, its role in the regulation of tumor processes has recently emerged as a research focus. The present study demonstrated that oxaliplatin was able to increase the levels of IL-17/IL-17R in hepatocellular carcinoma (HCC) patients and cells lines, and that it had important roles in reducing the susceptibility of the cells to oxaliplatin-induced apoptosis. Furthermore, the expression of autophagy-related proteins was induced by IL-17/IL-17R and autophagy was shown to induce resistance to oxaliplatin in HCC...
February 2017: Oncology Letters
https://www.readbyqxmd.com/read/28343894/-1-9-n%C3%AE-c-crourorb-a1-isolated-from-croton-urucurana-latex-induces-g2-m-cell-cycle-arrest-and-apoptosis-in-human-hepatocarcinoma-cells
#13
Priscila de Matos Cândido-Bacani, Frédéric Ezan, Patrícia de Oliveira Figueiredo, Maria de Fátima Cepa Matos, Fernanda Rodrigues Garcez, Walmir Silva Garcez, Georges Baffet
[1-9-NαC]-crourorb A1 is a cyclic peptide isolated from Croton urucurana Baillon latex, found in midwestern Brazil, that has been shown to exert cytotoxic effects against a panel of cancer cell lines. However, the underlying mechanisms responsible for the crourorb A1-induced cytotoxicity in cancer cells remain unknown. In this study, the effects of crourorb A1 on the viability, apoptosis, cell cycle and migration of Huh-7 (human hepatocarcinoma) cells were investigated. We evaluated the viability of Huh-7 cells treated with crourorb A1 in 2D and 3D collagen cultures and found that cells in 3D culture exhibited increased resistance to crourorb A1 compared to cells in 2D culture (IC50: 62μg/ml versus 35...
March 23, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28342979/guggulsterone-sensitized-drug-resistant-human-hepatocarcinoma-cells-to-doxorubicin-through-a-cox-2-p-gp-dependent-pathway
#14
Hong-Bin Xu, Jun Fu, Fang Huang, Jing Yu
Previous researches indicated that cyclooxygenase-2 (Cox-2) might be involved in P-glycoprotein (P-gp)-mediated multidrug resistance in hepatocellular carcinoma cells. Doxorubicin-resistant hepatocellular carcinoma PLC/PRF/5 cells (PLC/PRF/5R) and HepG2 (HepG2R) cells were developed in the present study. The modulatory effect of guggulsterone on Cox-2 and P-gp in PLC/PRF/5R and HepG2R cells was investigated. Cells proliferation, Cox-2 and P-gp expression, and prostaglandin E2 release were examined using MTT, flow cytometry, western blot and ELISA assays...
May 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28338113/antiproliferative-and-apoptotic-effects-of-lidocaine-on-human-hepatocarcinoma-cells-a-preliminary-study
#15
Ancuta Jurj, Ciprian Tomuleasa, Tiberiu T Tat, Ioana Berindan-Neagoe, Stefan V Vesa, Daniela C Ionescu
BACKGROUND AND AIMS: It is now well documented that certain anesthetic techniques may influence long term outcome in cancer patients undergoing surgery. More recently, local anesthetics proved certain antiproliferative effects in cancer cells. In our study, we aimed to investigate if lidocaine has antiproliferative effects in human hepatocarcinoma cells and to identify possible mechanisms of these effects. METHODS: We investigated the inhibitory effect of different concentrations of lidocaine on the proliferation of cultured HepG2 human hepatocarcinoma cells and LX2 normal liver fibroblasts...
March 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28337280/mir-15a-suppresses-hepatocarcinoma-cell-migration-and-invasion-by-directly-targeting-cmyb
#16
Bo Liu, Ting Sun, Gang Wu, Hui Shang-Guan, Zhao-Jin Jiang, Ji-Ren Zhang, Yan-Fang Zheng
PURPOSE: This study aimed to determine the function of miR-15a in HCC, and identify cMyb as a target of miR-15a. METHODS: RNA expression was evaluated by quantitative real-time PCR (qRT-PCR). The effects of miR-15a or cMyb on HCC cells were evaluated by transwell migration assay and western blot analysis. CMyb, the predicted target, has been frequently verified by luciferase assay. RESULTS: MiR-15a was markedly downregulated in sphere culture HCC cells by qRT-PCR...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28334689/design-characterization-and-in-vitro-evaluation-of-linalool-loaded-solid-lipid-nanoparticles-as-potent-tool-in-cancer-therapy
#17
Boris Rodenak-Kladniew, German A Islan, Margarita G de Bravo, Nelson Durán, Guillermo R Castro
Linalool (LN) is a monoterpene found in essential oils of plants and herbs that produces multiple effects on the mevalonate pathway and interesting antiproliferative activity in cancer cells. However, due to its poor aqueous solubility, an efficient vehicle is needed to improve its administration and bioavailability in physiological media. LN encapsulation in solid lipid nanoparticles (SLN) with different compositions was explored and in vitro tested in two cancer cell lines. SLN of myristyl myristate (MM), cetyl esters (SS) and cetyl palmitate (CP) were prepared by sonication in the presence of Pluronic(®)F68 as surfactant...
March 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28333073/effects-of-melatonin-on-liver-injuries-and-diseases
#18
REVIEW
Jiao-Jiao Zhang, Xiao Meng, Ya Li, Yue Zhou, Dong-Ping Xu, Sha Li, Hua-Bin Li
Liver injuries and diseases are serious health problems worldwide. Various factors, such as chemical pollutants, drugs, and alcohol, could induce liver injuries. Liver diseases involve a wide range of liver pathologies, including hepatic steatosis, fatty liver, hepatitis, fibrosis, cirrhosis, and hepatocarcinoma. Despite all the studies performed up to now, therapy choices for liver injuries and diseases are very few. Therefore, the search for a new treatment that could safely and effectively block or reverse liver injuries and diseases remains a priority...
March 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28331561/imatinib-induces-up-regulation-of-nm23-a-metastasis-suppressor-gene-in-human-hepatocarcinoma-hepg2-cell-line
#19
Behta Keshavarz-Pakseresht, Seyed Ataollah Sadat Shandiz, Fahimeh Baghbani-Arani
AIM: The present study investigated the anti-tumor activity of Imatinib mesylate through modulation of NM23 gene expression in human hepatocellular carcinoma (HepG2) cell line. BACKGROUND: Hepatocellular carcinoma (HCC) is considered to be the third leading cause of cancer related death worldwide. Down regulation of NM23, a metastasis suppressor gene, has been associated with several types of malignant cancer. Recently, effects of Imatinib mesylate, a first member of tyrosine kinases inhibitors, were indicated in research and treatment of different malignant tumors...
2017: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28302717/regulatory-signatures-of-liver-regeneration-distilled-by-integrative-analysis-of-mrna-histone-methylation-and-proteomics
#20
Yoshihiro Sato, Yasutake Katoh, Mitsuyo Matsumoto, Masaki Sato, Masayuki Ebina, Ari Itoh-Nakadai, Ryo Funayama, Keiko Nakayama, Michiaki Unno, Kazuhiko Igarashi
The capacity of the liver to regenerate is likely to be encoded as a plasticity of molecular networks within the liver. By applying a combination of comprehensive analyses of the epigenome, transcriptome and proteome, we herein depict the molecular landscape of liver regeneration. We demonstrated that histone H3K4 was tri-methylated at the promoter regions of many loci, among which only a fraction including cell-cycle-related genes were transcriptionally up-regulated. A cistrome analysis guided by the histone methylation patterns and the transcriptome identified FOXM1 as the key transcription factor promoting liver regeneration, which was confirmed in vitro using a hepatocarcinoma cell line...
March 16, 2017: Journal of Biological Chemistry
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