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Juan Qin, Dengwen Li, Yunqiang Zhou, Songbo Xie, Xin Du, Ziwei Hao, Ruming Liu, Xinqi Liu, Min Liu, Jun Zhou
Breast cancer is the most prevalent cancer in women. Although it begins as local disease, breast cancer frequently metastasizes to the lymph nodes and distant organs. Therefore, novel therapeutic targets are needed for the management of this disease. Apoptosis-linked gene 2 (ALG-2) is a calcium-binding protein crucial for diverse physiological processes and has recently been implicated in cancer development. However, it remains unclear whether this protein is involved in the pathogenesis of breast cancer. Here, we demonstrate that the expression of ALG-2 is significantly upregulated in breast cancer tissues and is correlated with clinicopathological characteristics indicative of tumor malignancy...
December 1, 2016: Oncotarget
Anderson Espirito Santo Pereira, Paula Mayara Silva, Jhones Luis Oliveira, Halley Caixeta Oliveira, Leonardo Fernandes Fraceto
This work concerns the development of nanocarriers composed of alginate/chitosan (ALG/CS) and chitosan/tripolyphosphate (CS/TPP) for the plant growth regulator gibberellic acid (GA3). ALG/CS nanoparticles with and without GA3 presented mean size of 450±10nm, polydispersity index (PDI) of 0.3, zeta potential of -29±0.5mV, concentrations of 1.52×10(11) and 1.92×10(11) nanoparticles mL(-1), respectively, and 100% encapsulation efficiency. CS/TPP nanoparticles with and without GA3 presented mean size of 195±1nm, PDI of 0...
November 23, 2016: Colloids and Surfaces. B, Biointerfaces
M Courtade-Saïdi, J Aziza, D d'Aure, E Bérard, S Evrard, C Basset, L Lacoste-Collin
OBJECTIVE: The presence of atypical cells in urine cytology is unsatisfactory for both cytologists and clinicians. The objective of this study was to test whether p53 and Ki-67 immunostaining could improve urothelial carcinoma (UC) detection on urinary cytology. METHODS: A total of 196 urine samples were analysed, 142 from the bladder, 41 from the upper tract and 13 from ileal bladder replacement. Cytology results were expressed as normal (N) (n = 81), atypia cannot exclude low-grade UC (ALG) (n = 25), suspicious for high-grade UC (SHG) (n = 39) and high-grade UC (HG) (n = 51)...
December 2016: Cytopathology: Official Journal of the British Society for Clinical Cytology
Diego Cortés-Arriagada
The potential applications of Al, Ti, Mn and Fe-doped graphene for environmental remediation of 1,4-dioxane (a critical pollutant and toxic compound) are analyzed in detail in the framework of density functional theory calculations. 1,4-Dioxane is a highly mobile and soluble pollutant and developing new strategies for its adsorption and subsequent removal becomes an important issue. All the systems were fully optimized and analyzed in their most stable spin states. The results determined that the proposed doped-graphene materials enhance the interaction with 1,4-dioxane compared to intrinsic graphene, with adsorption energies in the range of 1...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
Ying Cheng, Shu-Tao Zhao, Li Guo, Mei Deng, Qing Zhou, Yuan-Zong Song
Alagille syndrome (ALGS) is an autosomal dominant disorder which is mainly caused by JAG1 gene mutation and can affect multiple systems including the liver, heart, eyes, skeleton and face. This paper reports the clinical and genetic features of an ALGS patient. A 2-year-and-9-month-old boy was referred to the hospital with the complaint of abnormal liver function and heart murmur discovered over two years. Jaundice of the skin and sclera was not observed. The child had a prominent forehead, left esotropia, depressed nasal bridge and micromandible...
November 2016: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
Takashi Kanadome, Hideki Shibata, Keiko Kuwata, Terunao Takahara, Masatoshi Maki
ALG-2 (apoptosis-linked gene 2, a gene product of PDCD6) is a 22-kDa Ca(2+) -binding protein. Accumulating evidence points to a role for ALG-2 as a Ca(2+) -responsive adaptor protein. On binding to Ca(2+) , ALG-2 undergoes a conformational change that facilitates its interaction with various proteins. It also forms a homodimer and heterodimer with peflin, a paralog of ALG-2. However, the differences in cellular roles for the ALG-2 homodimer and ALG-2/peflin heterodimer are unclear. Here, we found that TFG (Trk-fused gene) interacted with the ALG-2 homodimer...
November 4, 2016: FEBS Journal
Yoko Idota, Yumi Kogure, Takako Kato, Kentaro Yano, Hiroshi Arakawa, Chihiro Miyajima, Fumiyoshi Kasahara, Takuo Ogihara
We investigated the relationship between the physical parameters of various metal ions, including toxic metal ions, and the binding affinity of these metal ions for alginate (Alg). The binding constant, K, of Sr(2+) was the highest among all tested metal ions. The order of K values was: Sr(2+)>Pb(2+)>Tb(3+)>Dy(3+)>Ca(2+)>Cd(2+)>Mg(2+)>Fe(2+)>Fe(3+)>Co(2+)>Al(3+)>Ni(2+)>Cs(+)>Cu(2+)>Ag(+)>Li(+)>K(+). The metal ions showing the highest K values had ionic radii within the range of about 90-120 pm...
2016: Biological & Pharmaceutical Bulletin
Enas Elmowafy, Rihab Osman, Rania A H Ishak
BACKGROUND: Due to its unique features, the respiratory tract had received great attention as a promising non-invasive route for drug administration to achieve both local and systemic effects. Efforts spent to tailor systems able to overcome the lung defence mechanisms and biological barriers are followed in this review. Aerodynamic diameter, morphology, lung deposition and drug release profiles are the main criteria describing the selected new smart lung targeted delivery systems. METHODS: Novel systems such as nanoparticles, nano-embedded-in microparticles (NEM), small microparticles (MP), large porous particles (LPP), PulmospheresTM and polymeric micelles are used to passively target different areas in the respiratory tract...
October 27, 2016: Current Pharmaceutical Design
Dominika Kulig, Anna Zimoch-Korzycka, Andrzej Jarmoluk
The aim of this work was to develop polyelectrolyte material suitable for active beef steaks coatings, by complexation of chitosan (CH) and sodium alginate (ALG) in a broad range of alginate/chitosan ratios (R). The rheological analysis confirmed significant effect of polymers ratios on the physical properties of sodium alginate-chitosan (ACH) hydrosols. The shear thinning non-Newtonian nature, thixotropic behavior and gel-like structure of solutions were displayed. Obtained complexes possess DPPH radical scavenging activity corresponding to 5...
January 2017: Meat Science
Jing Ma, Xianfeng Zhang, Yanbin Feng, Hui Zhang, Xiaojun Wang, Yonghui Zheng, Wentao Qiao, Xinqi Liu
In the HIV-1 replication cycle, the ESCRT (endosomal sorting complex required for transport) machinery promotes viral budding and release in the late stages. In this process, the ESCRT proteins, ALIX and TSG101, are recruited through interactions with HIV-1 Gag p6. ALG-2, also known as PDCD6, interacts with both ALIX and TSG101, and bridges ESCRT-III and ESCRT-I. In this study, we show that ALG-2 affects HIV-1 production negatively at both the exogenous and endogenous levels. Through a yeast two-hybrid screen, we identified HEBP2 as the binding partner of ALG-2, and solved the crystal structure of the ALG-2/HEBP2 complex...
October 26, 2016: Journal of Biological Chemistry
A P Furlan, N G Almarza, M C Barbosa
A lattice model for the study of mixtures of associating liquids is proposed. Solvent and solute are modeled by adapting the associating lattice gas (ALG) model. The nature of interaction of solute/solvent is controlled by tuning the energy interactions between the patches of ALG model. We have studied three set of parameters, resulting in, hydrophilic, inert, and hydrophobic interactions. Extensive Monte Carlo simulations were carried out, and the behavior of pure components and the excess properties of the mixtures have been studied...
October 14, 2016: Journal of Chemical Physics
Liping Feng, Yanping Cao, Duoxia Xu, Shaojia Wang, Jie Zhang
In this study, the effects of ultrasound with different ultrasonic frequencies on the properties of sodium alginate (ALG) were investigated, which were characterized by the means of the multi-angle laser light scattering photometer analysis (GPC-MALLS), rheological analysis, circular dichroism (CD) spectrometer and scanning electron microscope (SEM). It showed that the molecular weight (Mw) and molecular number (Mn) of the untreated ALG was 1.927×10(5)g/mol and 4.852×10(4)g/mol, respectively. The Mw of the ultrasound treated ALG was gradually increased from 3...
January 2017: Ultrasonics Sonochemistry
Kai Chen, Jiacheng Li, Yuhong Feng, Furui He, Qingfeng Zhou, Dunchao Xiao, Yiyuan Tang
Amphiphilic polymers that form self-assembled structures in aqueous media have been investigated and used for the diagnosis and therapy of various diseases, including cancer. In our work, a series of environment-sensitive hydrophobic alginates (Ugi-Alg) with various weight-average molecular mass values (Mw~6.7×10(5)-6.7×10(4)g/mol) were synthesized via Ugi reaction. The structure of Ugi-Alg was characterized by (1)HNMR spectrometer. The electrostatic self-assembly of different molecular weight (Mw) and composition (M/G ratio) of Ugi-Alg chain under various Na(+) concentrations, was investigated by dynamic light scattering, electron spin resonance experiments, and transmission electron microscopy...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Jaya R Lakkakula, Thabo Matshaya, Rui Werner Maçedo Krause
Cyclodextrins (CDs) have widely been used as component of drug delivery systems. However unmodified cyclodextrins are associated with cytotoxicity and poor water solubility thus limiting their use in pharmaceutical industry. The cationic-β-cyclodextrin (Cat-β-CD) polymer cores were synthesized using β-CD, epichlorohydrin and choline chloride via a one-step polycondensation process. The main aim of this study was to synthesize hierarchical nanoflowers composed of cationic-β-CD as polymeric core along with alginate and chitosan "petals" (Cat-β-CD/Alg-Chi nanoflowers) as carriers for oral delivery of 5-Fluorouracil (5-FU) via an ionic-gelation technique...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Dragica Spasojević, Danica Zmejkoski, Jasmina Glamočlija, Miloš Nikolić, Marina Soković, Verica Milošević, Ivana Jarić, Marijana Stojanović, Emilija Marinković, Talin Barisani-Asenbauer, Radivoje Prodanović, Miloš Jovanović, Ksenija Radotić
Nowadays bacterial resistance to known antibiotics is a serious health problem. In order to achieve more efficient treatment, lately there is an effort to find new substances, such as certain biomaterials, that are non-toxic to humans with antibiotic potential. Lignins and lignin-derived compounds have been proposed to be good candidates for use in medicine and health maintenance. In this study, the antibacterial activity of the lignin model polymer dehydrogenate polymer (DHP) in alginate hydrogel (Alg) was studied...
September 30, 2016: International Journal of Antimicrobial Agents
Yurun Shen, Mengying Hu, Liyan Qiu
AIM: In this study, we constructed a novel vector (BioPf-M-loaded Alg-microparticles [Alg-BioPf-M]) with nano-in-micro structure to improve the oral absorption of docetaxel (DTX) by sequentially dual-targeting functions toward intestine and sodium-dependent multivitamin transporter based on entrapping biotin-modified micelles into alginate microparticles. METHODS: A series of characteristics of this system was investigated, such as drug release, cellular uptake, transport pathway and the comprehensive in vivo studies including pharmacokinetic studies, anti-tumor activity and toxicity study...
October 12, 2016: Nanomedicine
Benliang Liang, Hewei Zhao, Qi Zhang, Yuzun Fan, Yonghai Yue, Penggang Yin, Lin Guo
Inspired by nacre, this is the first time that using the cross-linking of alginate with Ca ions to fabricate organic-inorganic nacre-inspired films we have successfully prepared a new class of Ca(2+) ion enhanced montmorillonite (MMT)-alginate (ALG) composites, realizing an optimum combination of high strength (∼280 MPa) and high toughness (∼7.2 MJ m(-3)) compared with other MMT based artificial nacre. Furthermore, high temperature performance of the composites (with a maximum strength of ∼170 MPa at 100 °C) along with excellent transmittance, fire retardancy, and unique shape memory response to alcohols could greatly expand the application of the mutilfunctional composites, which are believed to show competitive advantages in transportion, construction, and insulations, protection of a flammable biological material, etc...
October 11, 2016: ACS Applied Materials & Interfaces
Chao Feng, Jing Li, Yuzhi Mu, Ming Kong, Yang Li, Mazhar Ali Raja, Xiao Jie Cheng, Ya Liu, Xi Guang Chen
The primary constraints for efficient oral delivery of anticancer drugs include the efflux pump function of the multidrug transporter P-glycoprotein (P-gp) for anticancer drugs and the barriers to drug absorption in gastrointestinal (GI) tract. To improve bypassing P-gp drug efflux pumps and oral bioavailability of doxorubicin hydrochloride (DOX), Multilayer micro-dispersing system (MMS) was constructed by co-immobilization of DOX loaded chitosan/carboxymethyl chitosan nanogels (DOX:CS/CMCS-NGs), along with quercetin (Qu) in the core of multilayer sodium alginate beads (DOX:NGs/Qu-M-ALG-Beads)...
October 8, 2016: International Journal of Biological Macromolecules
Huizhen Zheng, Meng Gao, Ying Ren, Ruyun Lou, Hongguo Xie, Weiting Yu, Xiudong Liu, Xiaojun Ma
A pH-responsive carrier based on an ethylenediaminetetraacetic-calcium-alginate (EDTA-Ca-Alg) system was developed by controlling the release of Ca(2+). The system remained in the solution state at neutral pH since EDTA completely chelated the Ca(2+). In contrast, a hydrogel immediately formed when the pH was below 4.0, which triggered the in situ release of Ca(2+) from the EDTA-Ca compound and led to alginate-Ca binding. Taking advantage of the pH sensitivity, we prepared hydrogel microspheres with uniform size to entrap Lactobacillus rhamnosus ATCC 53103 through emulsification...
January 2, 2017: Carbohydrate Polymers
Alg Lobão, C M Ferruzzi, F Ohara, R F Lima, Hsa Abdalla-Ribeiro, F S Kuteken, J M Aldrighi, Paag Ribeiro
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
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