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https://www.readbyqxmd.com/read/29334577/consequences-of-the-f-d-a-directed-moratorium-on-silicone-gel-breast-implants-1992-2006
#1
Norman M Cole
The FDA silicone gel breast implant moratorium occurred 25 years ago. The immediate and long-term consequences of the moratorium are reviewed and assessed.
January 10, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29334574/improved-long-term-volume-retention-of-svf-gel-grafting-with-enhanced-angiogenesis-and-adipogenesis
#2
Yuteng Zhang, Junrong Cai, Tao Zhou, Yao Yao, Ziqing Dong, Feng Lu
BACKGROUND: The apoptosis of mature adipocytes after fat grafting can result in chronic inflammation, absorption, and fibrosis, leading to unpredictable outcomes. Selective elimination of mature adipocytes may result in better outcomes and a different underlying retention mode. We previously developed a mature-adipocyte-free product, SVF-gel, derived from lipoaspirate, which eliminates adipocytes while preserving the stromal vascular fraction. This study investigated the retention and regeneration mode of SVF-gel grafting...
January 10, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29334488/severe-intraocular-pressure-elevation-after-intracameral-healon-5-viscoelastic-support-for-post-operative-hypotony-after-xen-gel-stent-insertion
#3
Alice Bruynseels, Freda Sii, Imran Masood, Peter Shah
PURPOSE: To describe (i) a novel case of severe intraocular pressure (IOP) elevation due to intracameral Healon 5 for management of early post-operative hypotony following XEN Gel Stent insertion and (ii) the management of this complication. METHODS: A case report. RESULTS: A 52-year-old male, with primary open angle glaucoma and suboptimal left IOP control on maximally tolerated medical therapy, was managed with XEN Gel Stent insertion at another tertiary eye unit...
January 12, 2018: Journal of Glaucoma
https://www.readbyqxmd.com/read/29334392/control-of-collagen-gel-mechanical-properties-through-manipulation-of-gelation-conditions-near-the-sol-gel-transition
#4
A J Holder, N Badiei, K Hawkins, C Wright, P R Williams, D J Curtis
The ability to control the mechanical properties of cell culture environments is known to influence cell morphology, motility, invasion and differentiation. The present work shows that it is possible to control the mechanical properties of collagen gels by manipulating gelation conditions near the sol gel transition. This manipulation is accomplished by performing gelation in two stages at different temperatures. The mechanical properties of the gel are found to be strongly dependent on the duration and temperature of the first stage...
January 15, 2018: Soft Matter
https://www.readbyqxmd.com/read/29334386/organic-inorganic-hybrids-having-a-talc-like-structure-as-suitable-hosts-to-guest-a-wide-range-of-species
#5
J Brendlé
The sol-gel process involving hydrolysis and condensation reactions is an attractive way to form siloxane based hybrid materials since it is a one-step method performed under mild conditions. Organic-inorganic hybrids having a talc-like structure (TLH) can be obtained using this procedure starting from organotrialkoxysilanes having the formula R-Si(OR')3 (where R stands for an organic moiety and R' for a methyl or ethyl group) with different functionalities, an aqueous or ethanolic solution of a magnesium salt, and in some cases, an aqueous solution of sodium hydroxide...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29334217/characterization-of-an-hsp90-independent-interaction-between-the-co-chaperone-p23-and-the-transcription-factor-p53
#6
Huiwen Wu, Jashil Hyun, Maria A Martinez-Yamout, Sung Jean Park, Jane Dyson
The cancer-suppressing transcription factor p53 is regulated by a wide variety of cellular factors, including many chaperones. The DNA-binding domain (DBD) of p53 is known to interact with the chaperone Hsp90, but the role of other members of the chaperone network, including co-chaperones such as p23 is unknown. Using a combination of NMR titration, isothermal titration calorimetry, fluorescence anisotropy and native agarose gel electrophoresis, we have identified a direct interaction between the p53 DBD and the Hsp90 co-chaperone p23 that occurs in the absence of Hsp90...
January 15, 2018: Biochemistry
https://www.readbyqxmd.com/read/29334152/dynamic-coordination-of-eu-iminodiacetate-to-control-fluorochromic-response-of-polymer-hydrogels-to-multistimuli
#7
Gengsheng Weng, Srinivas Thanneeru, Jie He
New fluorochromic materials that reversibly change their emission properties in response to their environment are of interest for the development of sensors and light-emitting materials. A new design of Eu-containing polymer hydrogels showing fast self-healing and tunable fluorochromic properties in response to five different stimuli, including pH, temperature, metal ions, sonication, and force, is reported. The polymer hydrogels are fabricated using Eu-iminodiacetate (IDA) coordination in a hydrophilic poly(N,N-dimethylacrylamide) matrix...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29334135/liquid-letters
#8
Shaowei Shi, Xubo Liu, Yanan Li, Xuefei Wu, Dong Wang, Joe Forth, Thomas P Russell
Using the interfacial jamming of cellulose nanocrystal (CNC) surfactants, a new concept, termed all-liquid molding, is introduced to produce all-liquid objects that retain the shape and details of the mold with high fidelity, yet remain all liquid and are responsive to external stimuli. This simple process, where the viscosity of the CNC dispersion can range from that of water to a crosslinked gel, opens tremendous opportunities for encapsulation, delivery systems, and unique microfluidic devices. The process described is generally applicable to any functionalized nanoparticles dispersed in one liquid and polymer ligands having complementary functionality dissolved in a second immiscible liquid...
January 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29334132/oxybutynin-3-gel-for-the-treatment-of-primary-focal-hyperhidrosis-in-adolescents-and-young-adults
#9
Nicholas V Nguyen, Jane Gralla, James Abbott, Anna L Bruckner
BACKGROUND/OBJECTIVES: There are no reliably effective, well-tolerated topical agents for the treatment of hyperhidrosis. We sought to evaluate the efficacy and tolerability of oxybutynin 3% gel in adolescents and young adults with primary focal hyperhidrosis. METHODS: Patients with severe axillary hyperhidrosis were treated with topical oxybutynin 3% gel for 4 weeks. Response to treatment was assessed by calculating change in Hyperhidrosis Disease Severity Score from baseline to weeks 1 and 4...
January 15, 2018: Pediatric Dermatology
https://www.readbyqxmd.com/read/29334109/a-multifunctional-supramolecular-hydrogel-preparation-properties-and-molecular-assembly
#10
Lin Wang, Xuefeng Shi, Yaqian Wu, Jian Zhang, Yuejun Zhu, Jinben Wang
A novel supramolecular hydrogel was designed and constructed by molecular self-assembly of a cationic gemini surfactant, 1,3-bis(N,N-dimethyl-N-cetylammonium)-2-propylacrylate dibromide (AGC16), and an anionic aromatic compound, trisodium 1,3,6-naphthalenetrisulfonate (NTS). Owing to its unique structure, the hydrogel (abbreviated as AGC16/NTS) has the potential to be used as a multifunctional drug delivery system. The structure and properties of AGC16/NTS were characterized by rheological measurements, differential scanning calorimetry, variable-temperature 1H nuclear magnetic resonance, ultraviolet-visible spectroscopy, variable-temperature fluorescence emission spectroscopy, cryogenic scanning electron microscopy, transmission electron microscopy and X-ray diffraction methods...
January 15, 2018: Soft Matter
https://www.readbyqxmd.com/read/29333741/p-type-low-molecular-weight-hydrogelators
#11
Emily R Draper, Bart Dietrich, Christopher Brasnett, Stephen Sproules, Tom O McDonald, Annela M Seddon, Dave J Adams
As the use of low-molecular-weight gelators (LMWGs) as components in single and multicomponent systems for optoelectronic and solar cell applications increases, so does the need for more functional gelators. There are relatively few examples of p-type gelators that can be used in such systems. Here, the synthesis and characterization of three amino-acid-functionalized p-type gelators based on terthiophene, tetrathiafulvalene, and oligo(phenylenevinylene) are described. The cores of these molecules are already used as electron donors in optoelectronic applications...
January 15, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29333657/gelatin-methacryloyl-hydrogels-in-the-absence-of-a-crosslinker-as-3d-glioblastoma-multiforme-gbm-mimetic-microenvironment
#12
Pelin Erkoc, Fidan Seker, Tugba Bagci-Onder, Seda Kizilel
3D platforms are important for monitoring tumor progression and screening drug candidates to eradicate tumors such as glioblastoma multiforme (GBM), a malignant type of human brain tumor. Here, a new strategy is reported that exploits visible-light-induced crosslinking of gelatin where the reaction is carried out in the absence of an additional crosslinker. Visible light-induced crosslinking promotes the design of cancer microenvironment-mimetic system without compromising the cell viability during the process and absence of crosslinker facilitates the synthesis of the unique construct...
January 15, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29333046/development-and-validation-of-high-performance-thin-layer-chromatography-method-for-simultaneous-determination-of-polyphenolic-compounds-in-medicinal-plants
#13
C V Jayachandran Nair, Sayeed Ahamad, Washim Khan, Varisha Anjum, Rajani Mathur
Context: Quantitative standardization of plant-based products is challenging albeit essential to maintain their quality. Aims: This study aims to develop and validate high-performance thin-layer chromatography (HPTLC) method for the simultaneous determination of rutin (Ru), quercetin (Qu), and gallic acid (Ga) from Psidium guajava Linn. (PG) and Aegle marmelos (L.) Correa. (AM) and correlate with antioxidant activity. Materials and Methods: The stock solution (1 mg/mL) of standard Ru, Qu, and Ga in methanol: Water (1:1) was serially diluted and spotted (5 μL) on slica gel 60 F254 thin-layer chromatography plates...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332824/dithiothreitol-based-protein-equalization-technology-to-unravel-biomarkers-for-bladder-cancer
#14
J E Araújo, H López-Fernández, M S Diniz, Pedro M Baltazar, Luís Campos Pinheiro, Fernando Calais da Silva, Mylène Carrascal, Paula Videira, H M Santos, J L Capelo
This study aimed to assess the benefits of dithiothreitol (DTT)-based sample treatment for protein equalization to assess potential biomarkers for bladder cancer. The proteome of plasma samples of patients with bladder carcinoma, patients with lower urinary tract symptoms (LUTS) and healthy volunteers, was equalized with dithiothreitol (DTT) and compared. The equalized proteomes were interrogated using two-dimensional gel electrophoresis and matrix assisted laser desorption ionization time of flight mass spectrometry...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332650/amplification-of-hsp-65-gene-and-usage-of-restriction-endonuclease-for-identification-of-non-tuberculous-rapid-grower-mycobacterium
#15
Ajoy Kumar Verma, Rohit Sarin, Vijay Kumar Arora, Gavish Kumar, Jyoti Arora, Paras Singh, Vithal Prasad Myneedu
BACKGROUND: The rapid grower mycobacteria have emerged as significant group of human pathogen amongst the Runyon group IV organisms that are capable of causing infection in both the healthy and immunocompromised hosts. Study aimed to identification of species amongst rapid grower non tuberculous mycobacterial isolates by polymerase chain reaction - restriction enzyme analysis (PRA). Analysis and comparison of results with standard biochemical tests. METHODS: Rapid grower non tuberculous mycobacteria had been collected from liquid culture section during the study period...
January 2018: Indian Journal of Tuberculosis
https://www.readbyqxmd.com/read/29332450/identification-and-comparison-of-differentiation-related-proteins-in-hepatocellular-carcinoma-tissues-by-proteomics
#16
Sheng Zhao, Gang Su, Wenke Yang, Ping Yue, Bing Bai, Yanyan Lin, Jinduo Zhang, Yongjiang Ba, Zhiwen Luo, Xiaoming Liu, Lili Zhao, Yi Xie, Yaowei Xu, Shuo Li, Wenbo Meng, Xiaodong Xie, Xun Li
Histological differentiation is a major pathological criterion indicating the risk of tumor invasion and metastasis in patients with hepatocellular carcinoma. The degree of tumor differentiation is controlled by a complex interacting network of associated proteins. The principal aim of the present study is to identify the possible differentiation-related proteins which may be used for early diagnosis and more effective therapies. We compared poorly differentiated and well-differentiated hepatocellular carcinoma tissues by using 2-dimensional gel electrophoresis and matrix-assisted laser desorption ionization time-of-flight mass spectrometry...
December 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/29332290/dna-diffusion-assay-applied-to-plant-cells
#17
Anca Macovei, Mattia Donà, Daniela Carbonera, Alma Balestrazzi
DNA diffusion assay is a simple, sensitive and reliable technique which allows the assessment of programmed cell death (PCD) or necrosis events based on nuclear morphology. It consists in isolating nuclei from plant material, which are then embedded in agarose and subjected to lysis in alkaline buffers. Under these conditions, and due to the presence of abundant alkali-labile sites in the DNA, small pieces of DNA diffuse in the agarose gel giving a specific halo appearance when stained with fluorescent dyes like DAPI (4',6-diamidino-2-phenylindole)...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29332283/markers-of-developmentally-regulated-programmed-cell-death-and-their-analysis-in-cereal-seeds
#18
Fernando Domínguez, Francisco Javier Cejudo
Programmed cell death (PCD) is a key process for the development and differentiation of multicellular organisms, which is characterized by well-defined morphological and biochemical features. These include chromatin condensation, DNA degradation and nuclear fragmentation, with nucleases and proteases playing a relevant function in these processes. In this chapter we describe methods routinely used for the analysis of hallmarks of developmentally regulated PCD in cereal seed tissues, which are based on agarose and polyacrylamide gel electrophoresis, in situ staining of DNA fragmentation, and cell-free assays of relevant enzymatic activities...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29332142/purification-and-characterization-of-a-novel-organic-solvent-tolerant-and-cold-adapted-lipase-from-psychrobacter-sp-zy124
#19
Yue Zhang, Fangling Ji, Jingyun Wang, Zhongji Pu, Bo Jiang, Yongming Bao
By screening 25 different psychrophilic strains isolated from the Arctic habitat, we isolated a strain capable of producing lipase. We identified this strain as Psychrobacter sp. ZY124 based on the amplified 16S rDNA sequence. The lipase, named as Lipase ZC12, produced from the supernatant of Psychrobacter sp. ZY124 cultured at 15 °C was purified to homogeneity by ammonium sulfate precipitation followed by Phenyl Sepharose FF gel hydrophobic chromatography. Based on the obtained amino acid sequence, Lipase ZC12 is classified as a member of the Proteus/psychrophilic subfamily of lipase family I...
January 13, 2018: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/29332140/identification-of-cross-reactive-antigens-of-c-botulinum-types-a-b-e-f-by-immunoproteomic-approach
#20
Arti Sharma, Sarkaraisamy Ponmariappan, Rani Sarita, Syed Imtiaz Alam, Dev Vrat Kamboj, Sangeeta Shukla
Diseases triggered by microorganisms can be controlled by vaccines, which need neutralizing antigens. Hence, it is very crucial to identify extremely efficient immunogens for immune prevention. Botulism, a fatal neuroparalytic disease, is caused by botulinum neurotoxins produced by the anaerobic, Gram-positive spore-forming bacteria, Clostridium botulinum. Food-borne botulism and iatrogenic botulism are caused by botulinum toxin. Wound botulism, infant botulism, and adult intestinal botulism are caused by primarily C...
January 13, 2018: Current Microbiology
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