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https://www.readbyqxmd.com/read/27936114/long-circulating-curcumin-loaded-liposome-formulations-with-high-incorporation-efficiency-stability-and-anticancer-activity-towards-pancreatic-adenocarcinoma-cell-lines-in-vitro
#1
Mohamed Mahmud, Adriana Piwoni, Nina Filiczak, Martyna Janicka, Jerzy Gubernator
The incorporation of hydrophobic drugs into liposomes improve their bioavailability and leads to increased stability and anticancer activity, along with decreased drug toxicity. Curcumin (Cur) is a natural polyphenol compound with a potent anticancer activity in pancreatic adenocarcinoma (PA). In the present study, different types of Cur-loaded liposomal formulations were prepared and characterized in terms of size, shape, zeta potential, optimal drug-to-lipid ratio and stability at 4°C, 37°C; and in human plasma in vitro...
2016: PloS One
https://www.readbyqxmd.com/read/27925662/clinical-and-pathological-features-of-hair-coat-abnormalities-in-curly-coated-retrievers-from-uk-and-sweden
#2
R Bond, K Varjonen, A Hendricks, Y M Chang, H Brooks Brownlie
OBJECTIVES: To gain information on hair loss amongst curly coated retrievers by questionnaire and to define the clinical and pathological features of hair coat abnormalities in affected dogs in the United Kingdom and Sweden. MATERIALS AND METHODS: Questionnaires were completed by members of the Curly Coated Retriever Clubs. Fourteen dogs (six in the United Kingdom, eight in Sweden) were clinically examined and skin/hair samples collected for microscopy and histopathology...
December 2016: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/27924161/combination-therapy-for-ulcerative-colitis-orally-targeted-nanoparticles-prevent-mucosal-damage-and-relieve-inflammation
#3
Bo Xiao, Zhan Zhang, Emilie Viennois, Yuejun Kang, Mingzhen Zhang, Moon Kwon Han, Jiucun Chen, Didier Merlin
Combination therapy is an emerging strategy that is under intensive preclinical investigation for the treatment of various diseases. CD98 is highly overexpressed on the surfaces of epithelial cells and macrophages in the colon tissue with ulcerative colitis (UC), which is usually associated with mucosal damage and inflammation. We previously proved that CD98 siRNA (siCD98)-induced down-regulation of CD98 in colitis tissue decreased the severity of UC to a certain extent. In an effort to further improve the therapeutic efficacy, we aim to simultaneously deliver siCD98 in combination with a potent anti-inflammatory agent, curcumin (CUR), using hyaluronic acid (HA)-functionalized polymeric nanoparticles (NPs)...
2016: Theranostics
https://www.readbyqxmd.com/read/27918967/nanoencapsulation-an-efficient-and-promising-approach-to-maximize-wound-healing-efficacy-of-curcumin-a-review-of-new-trends-and-state-of-the-art
#4
REVIEW
Zahid Hussain, Hnin Ei Thu, Shiow-Fern Ng, Shahzeb Khan, Haliza Katas
Wound healing is a multifarious and vibrant process of replacing devitalized and damaged cellular structures, leading to restoration of the skin's barrier function, re-establishment of tissue integrity, and maintenance of the internal homeostasis. Curcumin (CUR) and its analogs have gained widespread recognition due to their remarkable anti-inflammatory, anti-infective, anticancer, immunomodulatory, antioxidant, and wound healing activities. However, their pharmaceutical significance is limited due to inherent hydrophobic nature, poor water solubility, low bioavailability, chemical instability, rapid metabolism and short half-life...
November 30, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27917837/purification-crystallization-and-characterization-of-the-pseudomonas-outer-membrane-protein-fapf-a-functional-amyloid-transporter
#5
Sarah L Rouse, Wlliam J Hawthorne, Sebastian Lambert, Marc L Morgan, Stephen A Hare, Stephen Matthews
Bacteria often produce extracellular amyloid fibres via a multi-component secretion system. Aggregation-prone, unstructured subunits cross the periplasm and are secreted through the outer membrane, after which they self-assemble. Here, significant progress is presented towards solving the high-resolution crystal structure of the novel amyloid transporter FapF from Pseudomonas, which facilitates the secretion of the amyloid-forming polypeptide FapC across the bacterial outer membrane. This represents the first step towards obtaining structural insight into the products of the Pseudomonas fap operon...
December 1, 2016: Acta Crystallographica. Section F, Structural Biology Communications
https://www.readbyqxmd.com/read/27913673/structural-insights-into-functional-amyloid-inhibition-in-gram-ve-bacteria
#6
REVIEW
William Hawthorne, Sarah Rouse, Lee Sewell, Stephen J Matthews
Amyloids are proteinaceous aggregates known for their role in debilitating degenerative diseases involving protein dysfunction. Many forms of functional amyloid are also produced in nature and often these systems require careful control of their assembly to avoid the potentially toxic effects. The best-characterised functional amyloid system is the bacterial curli system. Three natural inhibitors of bacterial curli amyloid have been identified and recently characterised structurally. Here, we compare common structural features of CsgC, CsgE and CsgH and discuss the potential implications for general inhibition of amyloid...
December 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27913127/co-assembly-of-doxorubicin-and-curcumin-targeted-micelles-for-synergistic-delivery-and-improving-anti-tumor-efficacy
#7
Wenzhuan Ma, Qiang Guo, Ying Li, Xiaohui Wang, Jinling Wang, Pengfei Tu
Chemotherapeutic drugs have a series of limitations in anti-tumor treatment, mainly including multidrug resistance (MDR) and serious adverse reactions. Co-delivery system with two or more synergistic therapeutic drugs is an effective strategy to settle these limitations. In this study, active tumor-targeted co-delivery micelles (DOX+Cur)-PMs, with two synergistic drugs of a therapeutic drug of doxorubicin (DOX) and a chemosensitizer of curcumin (Cur) co-encapsulated into hyaluronic acid-vitamin E succinate (HA-VES) graft copolymer, were prepared and delivered simultaneously into tumor cells for improving therapeutic effects of DOX...
November 29, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27903456/millifluidic-synthesis-of-amorphous-drug-polysaccharide-nanoparticle-complex-with-tunable-size-intended-for-supersaturating-drug-delivery-applications
#8
The-Thien Tran, Minh-Hiep Nguyen, Yong Zen Tan, Jia Wei Chew, Saif A Khan, Kunn Hadinoto
The conventional bulk mixing method to prepare amorphous drug-polysaccharide nanoparticle complex (or drug nanoplex in short) has a major drawback in the lack of size control for the nanoplex produced, hence limiting its potential applications as a supersaturating drug delivery system for bioavailability enhancement of poorly soluble drugs. For this reason, we developed a continuous millifluidic synthesis platform of the drug nanoplex exhibiting high size tunability using curcumin (CUR) and chitosan (CHI) as the models for drug and polysaccharides, respectively...
November 27, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27901497/curcumin-carrying-nanoparticles-prevent-ischemia-reperfusion-injury-in-human-renal-cells
#9
Yong Xu, Ning Hu, Wei Jiang, Hong-Fang Yuan, Dong-Hui Zheng
Renal ischemia-reperfusion injury (IRI) is a major complication in clinical practice. However, despite its frequency, effective preventive/treatment strategies for this condition are scarce. Curcumin possesses antioxidant properties and is a promising potential protective agent against renal IRI, but its poor water solubility restricts its application. In this study, we constructed curcumin-carrying distearoylphosphatidylethanolamine-polyethylene glycol nanoparticles (Cur-NPs), and their effect on HK-2 cells exposed to IRI was examined in vitro...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27900602/transepithelial-transport-of-curcumin-in-caco-2-cells-is-significantly-enhanced-by-micellar-solubilisation
#10
Jan Frank, Christina Schiborr, Alexa Kocher, Jürgen Meins, Dariush Behnam, Manfred Schubert-Zsilavecz, Mona Abdel-Tawab
Curcumin, the active constituent of Curcuma longa L. (family Zingiberaceae), has gained increasing interest because of its anti-cancer, anti-inflammatory, anti-diabetic, and anti-rheumatic properties associated with good tolerability and safety up to very high doses of 12 g. Nanoscaled micellar formulations on the base of Tween 80 represent a promising strategy to overcome its low oral bioavailability. We therefore aimed to investigate the uptake and transepithelial transport of native curcumin (CUR) vs. a nanoscaled micellar formulation (Sol-CUR) in a Caco-2 cell model...
November 29, 2016: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/27898839/ap2-erf-transcription-factors-involved-in-response-to-tomato-yellow-leaf-curly-virus-in-tomato
#11
Ying Huang, Bao-Long Zhang, Sheng Sun, Guo-Ming Xing, Feng Wang, Meng-Yao Li, Yong-Sheng Tian, Ai-Sheng Xiong
Tomato yellow leaf curly virus (TYLCV), transmitted by the whitefly (), causes leaf curling and yellowing, plant dwarfism, and growth inhibition in tomato ( L.). The APETALA2 (AP2) and ethylene response factor (ERF) transcription factor (TF) family, the largest plant-specific TF family, was identified to function in plant development and pathogen defense. Our study aimed to analyze the mechanism underlying the function of ERF (SlERF) TFs in response to TYLCV infection and improve useful information to increase the resistance to TYLCV in tomato...
July 2016: Plant Genome
https://www.readbyqxmd.com/read/27895800/a-novel-curcumin-analogue-is-a-potent-chemotherapy-candidate-for-human-hepatocellular-carcinoma
#12
Ji-An Zhao, Mei-Xiang Sang, Cui-Zhi Geng, Shi-Jie Wang, Bao-En Shan
Curcumin (CUR) has been demonstrated to protect against carcinogenesis and to prevent tumor development in cancer; however, the clinical application of CUR is limited by its instability and poor metabolic properties. The present study offers an strategy for a novel CUR analogue, (1E,4E)-1,5-bis(2-bromophenyl)penta-1,4-dien-3-one (GL63), to be used as a potential therapeutic agent for hepatocellular carcinoma (HCC) in vitro and in vivo. The current study demonstrated that GL63 exhibited more potent inhibition of proliferation of HCC cells than CUR...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27895754/evaluation-of-the-efficacy-of-paclitaxel-with-curcumin-combination-in-ovarian-cancer-cells
#13
Zeng Liu, Yuan-Yuan Zhu, Zhao-Yuan Li, Si-Qing Ning
The aim of the present study was to evaluate the efficacy of paclitaxel combined with curcumin (CUR) against drug resistance in ovarian cancer cells. PLGA-phospholipid-PEG nanoparticles were prepared using the nano precipitation method. The size and morphology of the nanoparticles were determined using a transmission electron microscope and particle size analyzer. The encapsulation efficiency of nanoparticles was determined using the ultrafiltration centrifugation method. The dialysis method was used to study the release of PLGA-phospholipid-PEG nanoparticles...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27889588/preparation-and-properties-evaluation-of-a-novel-ph-sensitive-liposomes-based-on-imidazole-modified-cholesterol-derivatives
#14
Liang Ju, Fang Cailin, Wu Wenlan, Yu Pinghua, Gao Jiayu, Li Junbo
As a new kind of drug carries, pH-sensitive liposomes have been widely studied in tumor therapy for their advantages of target ability and sustained-release. Here, we synthesized a pH-sensitive material, N-(3-Aminopropyl)imidazole-cholesterol (IM-Chol) and prepared a novel pH-sensitive liposomes using IM-Chol and phosphatidylcholine. IM-Chol was synthesized through amidation reaction between the amino group of N-(3-Aminopropyl)imidazole and acyl chloride group of cholesteryl chloroformate in a weak base solution...
November 23, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27884638/particle-size-effect-of-curcumin-nanosuspensions-on-cytotoxicity-cellular-internalization-in-vivo-pharmacokinetics-and-biodistribution
#15
C Bi, X Q Miao, S F Chow, W J Wu, R Yan, Y H Liao, Ahl Chow, Y Zheng
This study aimed to investigate the particle size effect on bioactivity, cellular internalization and bioavailability of curcumin (CUR) nanosuspension (CUR-NS). CUR-NSs of different particle sizes were prepared by two different anti-solvent precipitation methods. CUR-NS with the smallest size showed similar in vitro anticancer activity and bioavailability to the CUR solution, whereas nanosuspensions of larger particle sizes displayed higher in vitro cellular internalization and cytotoxicity, as well as higher in vivo AUC and slower clearance rate after i...
November 21, 2016: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/27882569/selective-reduction-in-the-expression-of-ugts-and-sults-a-novel-mechanism-by-which-piperine-enhances-the-bioavailability-of-curcumin-in-rat
#16
Xiaohui Zeng, Dake Cai, Qiaohuang Zeng, Zhao Chen, Guoping Zhong, Juncheng Zhuo, Haining Gan, Xuejun Huang, Ziming Zhao, Nan Yao, Dane Huang, Chengzhe Zhang, Dongmei Sun, Yuxing Chen
Curcumin (CUR) is known to exert numerous health-promoting effects in pharmacological studies, but its low-bioavailability hinders the development of CUR as a feasible therapeutic agent. Piperine (PIP) has been reported to enhance the bioavailability of CUR, but the underlying mechanism remains poorly understood. In an attempt to find the mechanism by which PIP enhances the bioavailability of CUR, dosage ratio (CUR: PIP) and PIP pre-treatment are hypothesized as key factors for bioavailability improvement in this combination...
November 23, 2016: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/27880834/overexpressed-proteins-in-hypervirulent-clade-8-and-clade-6-strains-of-escherichia-coli-o157-h7-compared-to-e-coli-o157-h7-edl933-clade-3-strain
#17
Natalia Amigo, Qi Zhang, Ariel Amadio, Qunjie Zhang, Wanderson M Silva, Baiyuan Cui, Zhongjian Chen, Mariano Larzabal, Jinlong Bei, Angel Cataldi
Escherichia coli O157:H7 is responsible for severe diarrhea and hemolytic uremic syndrome (HUS), and predominantly affects children under 5 years. The major virulence traits are Shiga toxins, necessary to develop HUS and the Type III Secretion System (T3SS) through which bacteria translocate effector proteins directly into the host cell. By SNPs typing, E. coli O157:H7 was separated into nine different clades. Clade 8 and clade 6 strains were more frequently associated with severe disease and HUS. In this study, we aimed to identify differentially expressed proteins in two strains of E...
2016: PloS One
https://www.readbyqxmd.com/read/27875944/development-and-evaluation-of-a-novel-polymeric-hydrogel-of-sucrose-acrylate-co-polymethylacrylic-acid-for-oral-curcumin-delivery
#18
Sijin Huang, Jialei Wang, Qing Shang
A monomer of sucrose acrylate (AC-sucrose) was synthesized by conjugating starting compound sucrose with methyl acrylate (MA). The obtained AC-sucrose was characterized by mass spectrometry (MS) and Fourier transform infrared (FTIR) spectroscopy. AC-sucrose was selected as a monomer to fabricate a novel pH sensitive hydrogel via free radical polymerization. The inner morphology of the final hydrogel was observed with an S-4800 scanning electron microscope (SEM). The swelling and de-swelling behaviors of the hydrogel chips were also studied...
November 23, 2016: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/27875592/curcumin-generates-oxidative-stress-and-induces-apoptosis-in-adult-schistosoma-mansoni-worms
#19
Daniela de Paula Aguiar, Mayara Brunetto Moreira Moscardini, Enyara Rezende Morais, Renato Graciano de Paula, Pedro Manuel Ferreira, Ana Afonso, Silvana Belo, Amanda Tomie Ouchida, Carlos Curti, Wilson Roberto Cunha, Vanderlei Rodrigues, Lizandra Guidi Magalhães
Inducing apoptosis is an interesting therapeutic approach to develop drugs that act against helminthic parasites. Researchers have investigated how curcumin (CUR), a biologically active compound extracted from rhizomes of Curcuma longa, affects Schistosoma mansoni and several cancer cell lines. This study evaluates how CUR influences the induction of apoptosis and oxidative stress in couples of adult S. mansoni worms. CUR decreased the viability of adult worms and killed them. The tegument of the parasite suffered morphological changes, the mitochondria underwent alterations, and chromatin condensed...
2016: PloS One
https://www.readbyqxmd.com/read/27875331/amine-functionalized-cubic-mesoporous-silica-nanoparticles-as-an-oral-delivery-system-for-curcumin-bioavailability-enhancement
#20
Sandy Budi Hartono, Lannie Hadisoewignyo, Yanan Yang, Anand Kumar Meka, Antaresti, Chengzhong Yu
In the present work, a simple method was used to develop composite curcumin-amine functionalized mesoporous silica nanoparticles (MSN). The nanoparticles were used to improve the bioavailability of curcumin in mice through oral administration. We investigated the effect of particle size on the release profile, solubility and oral bioavailability of curcumin in mice, including amine functionalized mesoporous silica micron-sized-particles (MSM) and MSN (100-200 nm). Curcumin loaded within amine functionalized MSN (MSN-A-Cur) had a better release profile and a higher solubility compared to amine MSM (MSM-A-Cur)...
December 16, 2016: Nanotechnology
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