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https://www.readbyqxmd.com/read/28513174/structure-and-activity-relationship-of-curcumin-role-of-methoxy-group-in-anti-inflammatory-and-anti-colitis-effects-of-curcumin
#1
Haixia Yang, Zheyuan Du, Weicang Wang, Mingyue Song, Katherine Z Sanidad, Elvira Sukamtoh, Jennifer Zheng, Li Tian, Hang Xiao, Zhenhua Liu, Guodong Zhang
Curcumin, a dietary compound from Turmeric, has beneficial effects on inflammatory diseases such as inflammatory bowel disease. While most previous studies have focused on structure-activity relationship of the thiol-reactive α, β-unsaturated carbonyl groups of curcumin, little is known about the roles of methoxy groups in biological activities of curcumin. Here we synthesized a series of curcumin analogs with different substitution groups (R = H-, Br-, Cl-, F-, NO2-, CH3-, and OH-) to replace the methoxy group, and evaluated their biological effects in vitro and in vivo...
May 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28511061/uptake-of-ga-curcumin-derivatives-in-different-cancer-cell-lines-toward-the-development-of-new-potential-68-ga-labelled-curcuminoids-based-radiotracers-for-tumour-imaging
#2
Sara Rubagotti, Stefania Croci, Erika Ferrari, Giulia Orteca, Michele Iori, Pier C Capponi, Annibale Versari, Mattia Asti
Thanks to the ability to suppress the proliferation and to kill tumour cells, several studies have shown the anti-cancer effects of curcumin (CUR) and its derivatives, i.e. diacetylcurcumin (DAC) and bis-dehydroxycurcumin (bDHC). This study is focused onto the development of curcuminoid complexes with gallium-68 employed as potential new radio-labelled probes to detect neoplastic tissues through imaging techniques such as positron emission tomography. To this purpose, the uptake of three Ga-curcuminoid complexes, namely Ga(CUR)2(+), Ga(DAC)2(+), Ga(bDHC)2(+), by various tumour cell lines was compared with the uptake of the same compounds by normal human lymphocytes by flow cytometry using the intrinsic fluorescence of the curcuminoids...
May 10, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28509589/characteristics-and-expression-profile-of-krt71-screened-by-suppression-subtractive-hybridization-cdna-library-in-curly-fleece-chinese-tan-sheep
#3
Xiaolong Kang, Yufang Liu, Jibin Zhang, Qinqin Xu, Chengkun Liu, Meiying Fang
As an important commercial trait for sheep, curly fleece has a great economic impact on production costs and efficiency in sheep industry. To identify genes that are important for curly fleece formation in mammals, a suppression subtractive hybridization analysis was performed on the shoulder skin tissues exposed to two different growth stages of Chinese Tan sheep with different phenotypes (curly fleece and noncurling fleece). BLAST analysis identified 67 differentially expressed genes, of which 31 were expressed lower and 36 were expressed higher in lambs than in adult sheep...
May 16, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28504884/d-%C3%AE-tocopheryl-succinate-phosphatidyl-ethanolamine-conjugated-amphiphilic-polymer-based-nanomicellar-system-for-the-efficient-delivery-of-curcumin-and-to-overcome-multiple-drug-resistance-in-cancer
#4
Omkara Swami Muddineti, Preeti Kumari, Balaram Ghosh, Vladimir P Torchilin, Swati Biswas
Nanomedicines have emerged as a promising treatment strategy for cancer. Multiple drug resistance due to overexpression of various drug efflux transporters and upregulation of apoptotic inhibitory pathways in cancer cells are major barriers that limit the success of chemotherapy. Here, we developed a d-α-tocopherol (α-TOS)/lipid-based copolymeric nanomicellar system (VPM) by conjugating phosphatidyl ethanolamine (PE) and α-TOS with poly(ethylene glycol) (PEG) via an amino acid linkage. The synthesized polymers were characterized by Fourier transform IR, gas-phase chromatography, and (1)H and (13)C NMR spectroscopy...
May 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28497950/deamidation-slows-curli-amyloid-protein-aggregation
#5
Hanliu Wang, Qin Shu, Carl Frieden, Michael L Gross
Non-enzymatic deamidation of asparagine and glutamine in peptides and proteins is a frequent modification both in vivo and in vitro. The biological effect is not completely understood, but it is often associated with protein degradation and loss of biological function. Here we describe the deamidation of CsgA, the major protein subunit of curli, which are important proteinaceous components of biofilms. CsgA has a high content of Asn and Gln, a feature seen in other proteins that self-aggregate. We have implemented an approach to monitor deamidation rapidly by following the globally centroid mass shift, providing guidance for studies at the residue level...
May 12, 2017: Biochemistry
https://www.readbyqxmd.com/read/28491145/combination-of-metformin-and-curcumin-targets-breast-cancer-in-mice-by-angiogenesis-inhibition-immune-system-modulation-and-induction-of-p53-independent-apoptosis
#6
Rabah Rashad Falah, Wamidh H Talib, Seba Jamal Shbailat
BACKGROUND: The effects of metformin (MET) and curcumin (CUR) single treatments have been tested against breast cancer; however, their combination has not been explored. Here, we evaluated the antitumor activity of MET and CUR combination against breast cancer in mice. MATERIALS AND METHODS: The antiproliferative activity of single and combined treatments against breast cancer cell lines was determined. Vascular endothelial growth factor (VEGF) and Trp53 expression was examined in EMT6/P cells...
April 2017: Therapeutic Advances in Medical Oncology
https://www.readbyqxmd.com/read/28489348/novel-curcumin-liposome-modified-with-hyaluronan-targeting-cd44-plays-an-anti-leukemic-role-in-acute-myeloid-leukemia-in-vitro-and-in-vivo
#7
Dan Sun, Jian-Kang Zhou, Linshu Zhao, Zhe-Yu Zheng, Jiao Li, Wenchen Pu, Shaoyang Liu, Xue-Sha Liu, Shu-Jun Liu, Yu Zheng, Yun Zhao, Yong Peng
Curcumin has been widely used as a food additive for centuries and has been recently explored for its anti-inflammatory and antitumor properties. Although curcumin is pharmacologically safe and efficacious to certain cancers, its role against acute myeloid leukemia (AML) still remains unclear, and it lacks clinical application due to low water solubility and low in vivo bioavailability. To address these issues, we developed a novel curcumin liposome modified with hyaluronan (HA-Cur-LPs) to specifically deliver curcumin to AML by targeting CD44 on AML cell surface...
May 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28488934/the-zebrafish-curly-fry-is-required-for-proper-centrosome-and-mitotic-spindle-assembly
#8
Mi Hye Song, Jeffrey C Medley, John Y Kuwada
The zebrafish curly fry (cfy) mutation leads to a dramatic increase in mitotic index and cell death starting during neural tube formation. The mutant phenotype is cell autonomous and does not result from defects in apical/basal polarity within the neuroepithelium. The increase in mitotic index could be due to increased proliferation or cell cycle arrest in mitosis. cfy embryos were analyzed to examine these two possibilities. By labeling embryos with a pulse of BrdU and anti-phospho-histone 3 and examining the DNA content by fluorescence activated cell sorting, we show that cfy mutants exhibit no increase in proliferation, but a significant increase in the number of cells arrested in mitosis...
May 10, 2017: Zebrafish
https://www.readbyqxmd.com/read/28482486/synthesis-and-characterization-of-curcumin-loaded-pla-hyperbranched-polyglycerol-electrospun-blend-for-wound-dressing-applications
#9
Govindaraj Perumal, Sreenath Pappuru, Debashis Chakraborty, A Maya Nandkumar, Dillip Kumar Chand, Mukesh Doble
This study is aimed to develop curcumin (Cur) incorporated electrospun nanofibers of a blend of poly (lactic acid) (PLA) and hyperbranched polyglycerol (HPG) for wound healing applications. Both the polymers are synthesized and fabricated by electrospinning technique. The produced nanofibers were characterized by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Colorimetry (DSC) and Thermogravimetric Analysis (TGA). Electrospun scaffolds (PLA/HPG/Cur) exhibits very high hydrophilicity, high swelling and drug uptake and promotes better cell viability, adhesion and proliferation when compared to PLA/Cur electrospun nanofibers...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28472690/nanoparticles-based-on-chitosan-hydrochloride-hyaluronic-acid-peg-containing-curcumin-in-vitro-evaluation-and-pharmacokinetics-in-rats
#10
Yurui Xu, Sajid Asghar, Liu Yang, Zhipeng Chen, Hongying Li, Wenwen Shi, Yibo Li, Qinqing Shi, Qineng Ping, Yanyu Xiao
Nanoparticles based on chitosan hydrochloride (CSH)-hyaluronic acid (HA)-PEG were prepared for delivering curcumin (CUR) (CUR-PNPs) to brain tumor. CUR-PNPs of 245.9nm and spherical morphology were obtained at optimized CSH/HA/PEG20000/CUR ratios with negative charge of about -27.2mV and EE of approximately 93.3%. Cytotoxicity studies showed that CUR-PNPs improved drug's anticancer activity in rat glioma cells (C6). The cellular uptake mechanism study showed active targeting of CUR-PNPs into C6 cells by HA mediated endocytosis...
May 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28470798/alternative-pathways-for-escherichia-coli-biofilm-formation-revealed-by-srna-overproduction
#11
Ashley Parker, Suanur Cureoglu, Nicholas De Lay, Nadim Majdalani, Susan Gottesman
Small regulatory RNAs have major roles in many regulatory circuits in Escherichia coli and other bacteria, including the transition from planktonic to biofilm growth. We tested Hfq-dependent sRNAs in E. coli for their ability, when overproduced, to inhibit or stimulate biofilm formation, in two different growth media. We identify two mutually exclusive pathways for biofilm formation. In LB, PgaA, encoding an adhesion export protein, played a critical role; biofilm was independent of the general stress factor RpoS or CsgD, regulator of curli and other biofilm genes...
May 4, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28470089/contribution-of-the-csga-and-bcsa-genes-to-salmonella-enterica-serovar-pullorum-biofilm-formation-and-virulence
#12
Muhanad El Hag, Feng Zheng, Su Yangyang, Wang Xiao, Afrah Yassin, Chen Sujuan, Daxin Peng, Xiufan Liu
Salmonella biofilm formation is important to environmental stress resistance and virulence. However, the roles of the csgA and bcsA genes, which affect curli protein and cellulose production, respectively, in Salmonella enterica serovar Pullorum, are unknown. Here we constructed deletions in the csgA and bcsA genes in Salmonella enterica serovar Pullorum strain S6702 and evaluated several aspects of biofilm formation and virulence. ΔcsgA showed decreased production of curli fimbriae, while ΔbcsA had reduced cellulose production...
May 4, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28467777/curcumin-induces-g2-m-cell-cycle-arrest-and-apoptosis-of-head-and-neck-squamous-cell-carcinoma-in-vitro-and-in-vivo-through-atm-chk2-p53-dependent-pathway
#13
An Hu, Jing-Juan Huang, Jing-Fei Zhang, Wei-Jun Dai, Rui-Lin Li, Zhao-Yang Lu, Jun-Li Duan, Ji-Ping Li, Xiao-Ping Chen, Jing-Ping Fan, Wei-Hua Xu, Hong-Liang Zheng
Studies have demonstrated that curcumin (CUR) exerts its tumor suppressor function in a variety of human cancers including head and neck squamous cell carcinoma (HNSCC). However, the exact underlying molecular mechanisms remain obscure. Here, we aim to test whether CUR affects ATM/Chk2/p53 signaling pathway, leading to the induction of cell cycle arrest, inhibition of angiogenesis of HNSCC in vitro and in vivo. To this end, we conducted multiple methods such as MTT assay, Invasion assay, Flow cytometry, Western blotting, RT-PCR, and transfection to explore the functions and molecular insights of CUR in HNSCC...
April 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28455219/ph-sensitive-polymeric-nanoparticles-for-co-delivery-of-doxorubicin-and-curcumin-to-treat-cancer-via-enhanced-pro-apoptotic-and-anti-angiogenic-activities
#14
Jinming Zhang, Jingjing Li, Zhi Shi, Yang Yang, Xi Xie, Simon MingYuen Lee, Yitao Wang, Kam W Leong, Meiwan Chen
Co-delivery of multiple drugs with complementary anticancer mechanisms by nano-carriers offers an effective strategy to treat cancer. The combination of drugs with pro-apoptotic and anti-angiogenic activities is potentially effective in treating human hepatocellular carcinoma (HCC). Herein, we developed a co-delivery system for doxorubicin (Dox), a pro-apoptotic drug, and curcumin (Cur), a potent drug for antiangiogenesis, in pH-sensitive nanoparticles (NPs) constituted with amphiphilic poly(β-amino ester) copolymer...
April 25, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28441794/reciprocal-interactions-of-leukemic-cells-with-bone-marrow-stromal-cells-promote-enrichment-of-leukemic-stell-cell-compartments-in-response-to-curcumin-and-daunorubicin
#15
Saeed Mohammadi, Mohsen Nikbakht, Seyed Mehdi Sajjadi, Fariba Rad, Bahram Chahardouli, Javid Sabour Takanlu, Shahrbano Rostami, Kamran Alimoghaddam, Ardeshir Ghavamzadeh, Seyed H Ghaffari
A predominant challenge in developing curative leukemia therapy is interactions of leukemic cells with the bone marrow stromal microenvironment. We aimed to investigate the role of stromal cells, such as bone marrow mesenchymal stromal cells (BMSCs) and osteoblasts (OBs), in curcumin (CUR) and daunorubicin (DNR) induced apoptosis of acute myeloid leukemia (AML) cells. We used KG1 and U937 as leukemia cell line models and treated them with CUR and DNR. The cells were then co-cultured with BMSCs or a combination of BMSCs and OBs as feeders...
March 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28436718/design-of-a-novel-curcumin-soybean-phosphatidylcholine-complex-based-targeted-drug-delivery-systems
#16
Jiajiang Xie, Yanxiu Li, Liang Song, Zhou Pan, Shefang Ye, Zhenqing Hou
Recently, the global trend in the field of nanomedicine has been toward the design of combination of nature active constituents and phospholipid (PC) to form a therapeutic drug-phospholipid complex. As a particular amphiphilic molecular complex, it can be a unique bridge of traditional dosage-form and novel drug delivery system. In thisarticle, on the basis of drug-phospholipid complex technique and self-assembly technique, we chose a pharmacologically safe and low toxic drug curcumin (CUR) to increase drug-loading ability, achieve controlled/sustained drug release and improve anticancer activity...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28435247/delivery-of-curcumin-by-directed-self-assembled-micelles-enhances-therapeutic-treatment-of-non-small-cell-lung-cancer
#17
Wen-Ting Zhu, Sheng-Yao Liu, Lei Wu, Hua-Li Xu, Jun Wang, Guo-Xin Ni, Qing-Bing Zeng
BACKGROUND: It has been widely reported that curcumin (CUR) exhibits anticancer activity and triggers the apoptosis of human A549 non-small-cell lung cancer (NSCLC) cells. However, its application is limited owing to its poor solubility and bioavailability. Therefore, there is an urgent need to develop a new CUR formulation with higher water solubility and better biocompatibility for clinical application in the future. MATERIALS AND METHODS: In this study, CUR-loaded methoxy polyethylene glycol-polylactide (CUR/mPEG-PLA) polymeric micelles were prepared by a thin-film hydration method...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28428341/ctf4-related-protein-recruits-lhp1-prc2-to-maintain-h3k27me3-levels-in-dividing-cells-in-arabidopsis-thaliana
#18
Yue Zhou, Emmanuel Tergemina, Haitao Cui, Alexander Förderer, Benjamin Hartwig, Geo Velikkakam James, Korbinian Schneeberger, Franziska Turck
Polycomb Repressive Complex (PRC) 2 catalyzes the H3K27me3 modification that warrants inheritance of a repressive chromatin structure during cell division, thereby assuring stable target gene repression in differentiated cells. It is still under investigation how H3K27me3 is passed on from maternal to filial strands during DNA replication; however, cell division can reinforce H3K27me3 coverage at target regions. To identify novel factors involved in the Polycomb pathway in plants, we performed a forward genetic screen for enhancers of the like heterochromatin protein 1 (lhp1) mutant, which shows relatively mild phenotypic alterations compared with other plant PRC mutants...
May 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28427956/curcumin-poly-2-methyl-2-oxazoline-b-tetrahydrofuran-b-2-methyl-2-oxazoline-formulation-an-improved-penetration-and-biological-effect-of-curcumin-in-f508del-cftr-cell-lines
#19
Cristine Gonçalves, Jean-Pierre Gomez, William Même, Bazoly Rasolonjatovo, David Gosset, Steven Nedellec, Philippe Hulin, Cécile Huin, Tony Le Gall, Tristan Montier, Pierre Lehn, Chantal Pichon, Philippe Guégan, Hervé Cheradame, Patrick Midoux
Neutral amphiphilic triblock ABA copolymers are of great interest to solubilize hydrophobic drugs. We reported that a triblock ABA copolymer consisting of methyl-2-oxazoline (MeOx) and tetrahydrofuran (THF) (MeOx6-THF19-MeOx6) (TBCP2) can solubilize curcumin (Cur) a very hydrophobic molecule exhibiting multiple therapeutic effects but whose insolubility and low stability in water is a major drawback for clinical applications. Here, we provide evidences by flow cytometry and confocal microscopy that Cur penetration in normal and ΔF508-CFTR human airway epithelial cell lines is facilitated by TBCP2...
April 17, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28427235/catan-ionic-hybrid-lipidic-nano-carriers-for-enhanced-bioavailability-and-anti-tumor-efficacy-of-chemodrugs
#20
Bilin Liu, Dan He, Jianyong Wu, Quan Sun, Mi Zhang, Qunyou Tan, Yao Li, Jingqing Zhang
To date there has not been any report on catan-ionic hybrid lipidic nano-carriers, let alone a report on applying them to deliver insoluble anti-tumor drugs. Catan-ionic hybrid lipidic nano-carriers containing curcumin (CUR-C-HLN) inherit the merits of catan-ionic systems, hybrid lipidic systems and nano-structured carriers (the second-generation substitute of solid lipidic nano-systems). Catan-ionic surfactants increased microvesicle stabilization by producing unordered isometric clusters, enhanced absorptive amount as an inhibitor of enzyme and protein, improved tumor accumulation by cellular endocytosis and membranous fusion; hybrid lipids helped to obtain high drug content and low leakage by forming a less-organized matrix arrangement...
May 9, 2017: Oncotarget
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