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Yousra M El-Far, Mahmoud M Zakaria, Mahmoud M Gabr, Amal M El Gayar, Laila A Eissa, Ibrahim M El-Sherbiny
AIM: The goal of this study was to improve curcumin (CUR) aqueous solubility and bioavailability via nanoformulation, and then study its activity and mechanism of action as an antidiabetic agent. METHODS: CUR-loaded pluronic nanomicelles (CURnp) were prepared and characterized. Biochemical assessments were performed as well as histological, confocal and RTPCR studies on pancreatic target tissues. RESULTS: CURnp with a diameter of 333 ± 6 nm and ζ potential of -26...
June 21, 2017: Nanomedicine
Mike Sleutel, Imke Van den Broeck, Nani Van Gerven, Cécile Feuillie, Wim Jonckheere, Claire Valotteau, Yves F Dufrêne, Han Remaut
Curli are functional amyloids produced by proteobacteria like Escherichia coli as part of the extracellular matrix that holds cells together into biofilms. The molecular events that occur during curli nucleation and fiber extension remain largely unknown. Combining observations from curli amyloidogenesis in bulk solutions with real-time in situ nanoscopic imaging at the single-fiber level, we show that curli display polar growth, and we detect two kinetic regimes of fiber elongation. Single fibers exhibit stop-and-go dynamics characterized by bursts of steady-state growth alternated with periods of stagnation...
June 19, 2017: Nature Chemical Biology
Liran Zhu, Yifan Dong, Sha Na, Ru Han, Chengyin Wei, Guangliang Chen
OBJECTIVE: The current study aimed to investigate whether the saponins, bioactive component of effects of D. collettii, could reduce the serum uric acid level in a hyperuricemic mouse via regulation of urate transporters. METHODS: Chronic hyperuricemia model was established by combine administration of adenine (100mg/kg) and ethambutol (250mg/kg). In the model group, the serum uric acid (SUA), urine uric acid (UUA) volume, and 24-h UUA values increased significantly, while the uric acid clearance rate (CUr) and creatinine clearance rate (CCr) values decreased...
June 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
James A McCubrey, Kvin Lertpiriyapong, Linda S Steelman, Steve L Abrams, Li V Yang, Ramiro M Murata, Pedro L Rosalen, Aurora Scalisi, Luca M Neri, Lucio Cocco, Stefano Ratti, Alberto M Martelli, Piotr Laidler, Joanna Dulińska-Litewka, Dariusz Rakus, Agnieszka Gizak, Paolo Lombardi, Ferdinando Nicoletti, Saverio Candido, Massimo Libra, Giuseppe Montalto, Melchiorre Cervello
Natural products or nutraceuticals have been shown to elicit anti-aging, anti-cancer and other health-enhancing effects. A key target of the effects of natural products may be the regulation of microRNA (miR) expression which results in cell death or prevents aging, diabetes, cardiovascular and other diseases. This review will focus on a few natural products, especially on resveratrol (RES), curcumin (CUR) and berberine (BBR). RES is obtained from the skins of grapes and other fruits and berries. RES may extend human lifespan by activating the sirtuins and SIRT1 molecules...
June 12, 2017: Aging
Thiago V V Costa, José Fernando Pacheco, Luís Fábio Silveira
The Curl-crested Aracari Pteroglossus beauharnaesii Wagler, 1832 is one of the most remarkable species in the family Ramphastidae. Among other distinctive plumage traits, its modified curly, shiny black crown feathers are unique in the family and are modified to an extent not found in any other living bird species (Brush 1967; Short & Horne 2002). The crown feathers, along with the distinct white throat, were considered sufficient justification in the past to include the species in the monotypic genus Beauharnaisius Bonaparte; however, molecular studies have shown that it is embedded within the genus Pteroglossus Illiger, sister to P...
March 23, 2017: Zootaxa
B Xu, Q Wang, H Jin, J X Li, H N Liu, Y J Mao, J Wei
Objective: To compare the cannulated screw internal fixation (IF) and hemiarthroplasty (HA) for displaced femoral neck fracture with cost-utility analysis (CUA). Methods: From January 2014 to August 2015, a total of 87 patients above 60 years old with displaced femoral neck fracture were admitted into the study and divided into 2 groups according to surgery type. There were 41 cases in IF group and 46 cases in HA group. During 1 year follow-up we collected the total cost due to fracture and applied EQ-5D index to evaluate the clinical effects...
June 6, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Qing Yao, David C Gutierrez, Ngoc Ha Hoang, Dongin Kim, Ruoning Wang, Christopher Hobbs, Lin Zhu
The novel self-assembling bottlebrush polyethylene glycol - polynorbornene - thiocresol block copolymers (PEG-PNB-TC) were synthesized by the Ring Opening Metathesis Polymerization (ROMP), followed by functionalization of the polymer backbone via the thio-bromo "Click" post-polymerization strategy. The PEG-PNB-TC copolymers could easily self-assemble into the nanoscale core-shell polymeric micelles. The hydrophobic anticancer drugs, such as paclitaxel (PTX), could be loaded into their hydrophobic core to form a stable drug-loaded micelle with a superior drug loading capacity of up to ~ 35 % (wt/wt)...
June 12, 2017: Molecular Pharmaceutics
Dinanath Gaikwad
The aim of this work was to prepare pectin-poly (vinyl pyrrolidone) [PVP] based curcumin particulates to enhance the anticancer potential of curcumin, solubility and allow its localized controlled release. Pectin-PVP based curcumin particulates (PECTIN-PVP CUR) were prepared by spray drying technique in different ratios and were evaluated for surface morphology, micromeritics, flowability, particle size, drug content, in vitro dissolution, inhalable fraction, anti-angiogenesis/angiolysis and cytotoxicity. Results of micromeritic properties, Carr's index, Hausner's ratio and angle of repose were satisfactory...
June 8, 2017: International Journal of Biological Macromolecules
Gongwei Jia, Botao Tan, Jingxi Ma, Lina Zhang, Xinhao Jin, Changqing Li
BACKGROUND: The role of Peroxiredoxin 6 (Prdx6) in brain ischemia remains unclear. Curcumin (Cur) treatment elicits neuroprotective effects against cerebral ischemic injury, and the associated mechanisms may involve Prdx6. In this study, we investigated whether Prdx6 and the transcription factor specific protein 1 (SP1) were involved in the antioxidant effect of Cur after stoke. METHODS: Focal cerebral ischemic injury was induced by transient middle cerebral artery occlusion for 2 hours in male Sprague-Dawley rats treated with or without Prdx6 siRNA...
2017: BioMed Research International
Chun-Wang Dong, Hong-Kai Zhu, Jie-Wen Zhao, Yong-Wen Jiang, Hai-Bo Yuan, Quan-Sheng Chen
Tea is one of the three greatest beverages in the world. In China, green tea has the largest consumption, and needle-shaped green tea, such as Maofeng tea and Sparrow Tongue tea, accounts for more than 40% of green tea (Zhu et al., 2017). The appearance of green tea is one of the important indexes during the evaluation of green tea quality. Especially in market transactions, the price of tea is usually determined by its appearance (Zhou et al., 2012). Human sensory evaluation is usually conducted by experts, and is also easily affected by various factors such as light, experience, psychological and visual factors...
June 2017: Journal of Zhejiang University. Science. B
Yan-Bin Guan, Shu-Yao Zhou, Yu-Qiong Zhang, Jia-le Wang, Yu-Dong Tian, Yong-Yan Jia, Yan-Jun Sun
The therapeutic potential of curcumin (Cur) is hampered by its poor aqueous solubility and low bioavailability. The aim of this study was to determine whether Cur nanoemulsions enhance the efficacy of Cur against prostate cancer cells and increase the oral absorption of Cur. Cur nanoemulsions were developed using the self-microemulsifying method and characterized by their morphology, droplet size and zeta potential. The results showed that the cytotoxicity and cell uptake were considerably increased with Cur nanoemulsions compared to free Cur...
June 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
Yahya Hobani, Ahmed Jerah, Anil Bidwai
Interaction of curcumin (CUR) with the enzyme dihydrofolate reductase (DHFR) was studied by molecular docking using AutoDock 4.2 as the docking software application. AutoDock 4.2 software serves as a valid and acceptable docking application to study the interactions of small compounds with proteins. Interactions of curcumin with DHFR were compared to those of methotrexate (MTX), a known inhibitor of the enzyme. The calculated free energy of binding (ΔG binding) shows that curcumin (ΔG = -9.02 kcal/mol; Ki = 243 nM) binds with affinity comparable to or better than MTX (ΔG = -8...
2017: Bioinformation
Qiaoling Wang, Jinlong Chen, Qingfei Niu, Xiumei Fu, Xiaohong Sun, Xiaojie Tong
This paper combined the decellularized scaffold of sciatic nerve of rats with graphene oxidized (GO), studied and facilitated the regeneration of sciatic nerve of rats, and provided the basis for the clinical application of nanomaterials. GO was prepared through improving Hammer's Method. Fourier Infrared Spectrum was used to scan and detect the functional groups in GO of sample by using the pellet method, the microcosmic morphological appearance of GO was observed by using the scanning electron microscope...
May 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
Lucia Ruxandra Tefas, Bianca Sylvester, Ioan Tomuta, Alina Sesarman, Emilia Licarete, Manuela Banciu, Alina Porfire
The aim of this work was to use the quality-by-design (QbD) approach in the development of long-circulating liposomes co-loaded with curcumin (CUR) and doxorubicin (DOX) and to evaluate the cytotoxic potential of these liposomes in vitro using C26 murine colon carcinoma cell line. Based on a risk assessment, six parameters, namely the phospholipid, CUR and DOX concentrations, the phospholipid:cholesterol molar ratio, the temperature during the evaporation and hydration steps and the pH of the phosphate buffer, were identified as potential risk factors for the quality of the final product...
2017: Drug Design, Development and Therapy
James A McCubrey, Kvin Lertpiriyapong, Linda S Steelman, Steve L Abrams, Lucio Cocco, Stefano Ratti, Alberto M Martelli, Saverio Candido, Massimo Libra, Giuseppe Montalto, Melchiorre Cervello, Agnieszka Gizak, Dariusz Rakus
Natural products or nutraceuticals promote anti-aging, anti-cancer and other health-enhancing effects. A key target of the effects of natural products may be the regulation of the PI3K/PTEN/Akt/mTORC1/GSK-3 pathway. This review will focus on the effects of curcumin (CUR), berberine (BBR) and resveratrol (RES), on the PI3K/PTEN/Akt/mTORC1/GSK-3 pathway, with a special focus on GSK-3. These natural products may regulate the pathway by multiple mechanisms including: reactive oxygen species (ROS), cytokine receptors, mirco-RNAs (miRs) and many others...
May 26, 2017: Advances in Biological Regulation
Elizângela A M S Almeida, Ismael C Bellettini, Francielle P Garcia, Maroanne T Farinácio, Celso V Nakamura, Adley F Rubira, Alessandro F Martins, Edvani C Muniz
Magnetic microgels with pH- and thermo-responsive properties were developed from the pectin maleate, N-isopropyl acrylamide, and Fe3O4 nanoparticles. The hybrid materials were characterized by infrared spectroscopy, scanning electron microscope coupled with X-ray energy dispersive spectroscopy, wide angle X-ray scattering, Zeta potential, and magnetization hysteresis measurements. Curcumin (CUR) was loaded into the microgels, and release assays were carried out in simulated environments (SGF and SIF) at different conditions of temperature (25 or 37°C)...
September 1, 2017: Carbohydrate Polymers
Thayyath Sreenivasan Anirudhan, Manasa Mohan Anila, Shainy Franklin
Cancer continues to be a serious disaster to mankind. Chemotherapy is an efficient and effective treatment against cancer. Lack of selectivity is the main challenge faced by chemotherapy. In present study we used folic acid (FA) as a targeting ligand, which selectively targets the cancer cell lines with over expressed folate receptors (FR). We grafted polyethylene glycol (PEG) to polyethylene imine (PEI) to form PEG-b-PEI (mPPS), which is then coupled with FA to form FA- PEG-b-PEI (PPF) which is then assembled with curcumin (CUR) loaded alginate nanoparticle (AlgNP)...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Xi-Qing Yan, Yong-Li Shi, Cai-Li Qiao, Ying-Ying Li, Xi-Min Wei, Xin-Ru Qiao
An amphipathic copolymer of poly(polyethylene glycol-b-polycaprolactone-co-hydroxypropyl methyl cyclodextrin) [poly(mPEG-b-PCL-co-HPCD)] was synthesized via the free radical polymerization. The copolymer was used to prepare novel nanoparticles (NPs) by a solvent evaporation method. Curcumin (CUR) was selected as a model drug and loaded in the both sites of inner NPs and the cavities of HPCD. (1)H nuclear magnetic resonance ((1)H NMR) study was carried out to confirm the synthesis of poly(mPEG-b-PCL-co-HPCD)...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Rajamohamed Beema Shafreen, Siddharthan Seema, Abdulazees Parveez Ahamed, Nooruddin Thajuddin, Sulaiman Ali Alharbi
Extended spectrum beta lactamase (ESBL) are emerging beta-lactamases in Gram-negative pathogens, causing serious problems in hospitalized patients worldwide. Biofilm mode of virulence has decreased the efficiency of antibiotics used for treatment against ESBL pathogens. Therefore, there is an urgent need for alternative agents such as nanoparticles that can prevent and inhibit the biofilm formation. The aim of the present study was to inhibit the biofilm formed by ESBL-producing Escherichia coli using silver nanoparticles (AgNPs) synthesized with fresh water diatom (Nitzschia palea)...
June 1, 2017: Applied Biochemistry and Biotechnology
K Mkentane, J C Van Wyk, N Sishi, F Gumedze, M Ngoepe, L M Davids, N P Khumalo
INTRODUCTION: Curly hair is reported to contain higher lipid content than straight hair, which may influence incorporation of lipid soluble drugs. The use of race to describe hair curl variation (Asian, Caucasian and African) is unscientific yet common in medical literature (including reports of drug levels in hair). This study investigated the reliability of a geometric classification of hair (based on 3 measurements: the curve diameter, curl index and number of waves). MATERIALS AND METHODS: After ethical approval and informed consent, proximal virgin (6cm) hair sampled from the vertex of scalp in 48 healthy volunteers were evaluated...
2017: PloS One
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