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https://www.readbyqxmd.com/read/28335344/a-targeted-nanoprobe-based-on-carbon-nanotubes-natural-biopolymer-chitosan-composites
#1
Baoyan Wu, Na Zhao
A novel targeting theranostic nanoprobe based on single-walled carbon nanotubes (SWCNTs)-natural biopolymer chitosan composites was developed for cancer cell targeting imaging and fluorescence imaging-guided photodynamic therapy. First, chitosan was respectively conjugated with a tumor-homing molecule folic acid, or a photosensitizing drug pyropheophorbide a using a water-soluble carbodiimide coupling chemistry. Chitosan was fluorescently labeled by fluorescein isothiocyanate via the covalently linkage of the isothiocyanate group with the amino group...
November 17, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334625/magnetic-microspheres-based-cytometric-bead-array-assay-for-highly-sensitive-detection-of-ochratoxin-a
#2
Weijun Kong, Changbin Xiao, Guangyao Ying, Xiaofei Liu, Xiaohong Zhao, Ruilin Wang, Li Wan, Meihua Yang
Accurate and sensitive quantification of a specific class of mycotoxins at trace levels in complex matrices with greener approaches is of significant importance. In this study, a green and economical protocol of magnetic microspheres-based cytometric bead array (CBA) assay on indirect competitive principle was developed for sensitive and rapid detection of ochratoxin A (OTA) in malts with a small number of standard and sample solutions. The protocol included the competition of OTA in malt samples and that covalently coupled on the surface of microspheres with its monoclonal antibodies, the separation and aggregation of the magnetic microspheres, and the fluorescence detection of fluorescein isothiocyanate labeled goat anti-mouse immunoglobulin G probes...
March 14, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28334285/control-of-the-bradysia-odoriphaga-diptera-sciaridae-with-allyl-isothiocyanate-under-field-and-greenhouse-conditions
#3
Cai-Hua Shi, Jing-Rong Hu, Wen Xie, Yu-Ting Yang, Shao-Li Wang, You-Jun Zhang
The botanical compound allyl isothiocyanate (AITC) is toxic to many microorganisms and insects. The aim of this study was to assess the effects of AITC on the Bradysia odoriphaga (Diptera: Sciaridae), as well as the seeds and seedlings of Chinese chive. AITC was toxic to all four stages of B. odoriphaga. The adult was significantly more sensitive (LC50 = 7.43 µl liter-1) to AITC than the other three stages, which had no difference in sensitivity to the chemical. The control efficacy of AITC against B. odoriphaga was much better in the greenhouse than that in the field...
March 2, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28328644/identification-of-key-odorants-in-used-disposable-absorbent-incontinence-products
#4
Gunnar Hall, Susanne Alenljung, Ulla Forsgren-Brusk
PURPOSE: The purpose of this study was to identify key odorants in used disposable absorbent incontinence products. DESIGN: Descriptive in vitro study SUBJECTS AND SETTING:: Samples of used incontinence products were collected from 8 residents with urinary incontinence living in geriatric nursing homes in the Gothenburg area of Sweden. Products were chosen from a larger set of products that had previously been characterized by descriptive odor analysis. METHODS: Pieces of the used incontinence products were cut from the wet area, placed in glass bottles, and kept frozen until dynamic headspace sampling of volatile compounds was completed...
March 22, 2017: Journal of Wound, Ostomy, and Continence Nursing
https://www.readbyqxmd.com/read/28328630/fluorescein-isothiocyanate-a-novel-application-for-lymphatic-surgery
#5
Lisa Spiguel, Christiana Shaw, Adam Katz, Lifei Guo, Hung-Chi Chen, Bernard T Lee, Dhruv Singhal
The Lymphatic Microsurgical Preventing Healing Approach (LYMPHA) procedure entails performing a lymphovenous bypass (LVB) at the time of axillary lymph node dissection to reduce lymphedema risk. The two most common fluorophores utilized in LVB are blue dye and indocyanine green. We developed a novel application of fluorescein isothiocyanate for intraoperative lymphatic mapping. Our goal is to demonstrate the safety and efficacy of fluorescein isothiocyanate for this application. We reviewed a prospectively collected database on breast cancer patients who underwent LYMPHA from March to September 2015...
March 21, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28327438/lipopolysaccharide-induced-suppression-of-periodontal-ligament-cell-proliferation-and-apoptosis-are-strengthened-under-high-glucose-conditions
#6
Jianxin Liu, Shulan Chen, Weiwei Ren, Jianing Liu, Pishan Yang, Zhenggang Chen, Qiang Zhang, Fang Yang
The present study aimed to investigate the effect of lipopolysaccharide (LPS) on the proliferation and apoptosis of human periodontal ligament (hPDL) cells under normal glucose or high glucose conditions. Primary cultures of hPDL cells were prepared from extracted premolars of patients. The cells were incubated with 0, 1, or 10μg/mL LPS under normal glucose (5.5mmol/L) or high glucose (25mmol/L) conditions for 24h or 48h. Cell proliferation was detected using a CCK-8 assay, and cell apoptosis was measured by Hoechst 33258 staining and Annexin V-fluorescein isothiocyanate (FITC)/propidium iodide (PI) double staining...
January 17, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28323272/constipation-predominant-irritable-bowel-syndrome-females-have-normal-colonic-barrier-and-secretory-function
#7
Stephanie A Peters, Shoko Edogawa, Wendy J Sundt, Roy B Dyer, Daniel A Dalenberg, Amelia Mazzone, Ravinder J Singh, Natalie Moses, Thomas C Smyrk, Christopher Weber, David R Linden, Wallace K MacNaughton, Jerrold R Turner, Michael Camilleri, David A Katzka, Gianrico Farrugia, Madhusudan Grover
OBJECTIVES: The objective of this study was to determine whether constipation-predominant irritable bowel syndrome (IBS-C) is associated with changes in intestinal barrier and secretory function. METHODS: A total of 19 IBS-C patients and 18 healthy volunteers (all females) underwent saccharide excretion assay (0.1 g (13)C mannitol and 1 g lactulose), measurements of duodenal and colonic mucosal barrier (transmucosal resistance (TMR), macromolecular and Escherichia coli Bio-Particle translocation), mucosal secretion (basal and acetylcholine (Ach)-evoked short-circuit current (Isc)), in vivo duodenal mucosal impedance, circulating endotoxins, and colonic tight junction gene expression...
March 21, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28322199/adrenomedullin-suppresses-vascular-endothelial-growth-factor-induced-vascular-hyperpermeability-and-inflammation-in-retinopathy
#8
Akira Imai, Yuichi Toriyama, Yasuhiro Iesato, Kazutaka Hirabayashi, Takayuki Sakurai, Akiko Kamiyoshi, Yuka Ichikawa-Shindo, Hisaka Kawate, Megumu Tanaka, Tian Liu, Xian Xian, Liuyu Zhai, Kun Dai, Keiya Tanimura, Teng Liu, Nanqi Cui, Akihiro Yamauchi, Toshinori Murata, Takayuki Shindo
Diabetic macular edema (DME) is caused by blood-retinal barrier breakdown associated with retinal vascular hyperpermeability and inflammation, and it is the major cause of visual dysfunction in diabetic retinopathy. Adrenomedullin (ADM) is an endogenous peptide first identified as a strong vasodilator. ADM is expressed in the eyes and is up-regulated in various eye diseases, although the pathophysiological significance is largely unknown. We investigated the effect of ADM on DME. In Kimba mice, which overexpress human vascular endothelial growth factor in their retinas, the capillary dropout, vascular leakage, and vascular fragility characteristic of diabetic retinopathy were observed, and these changes were accompanied by retinal inflammation...
March 16, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28317761/functionalities-of-chitosan-conjugated-with-stearic-acid-and-gallic-acid-and-application-of-the-modified-chitosan-in-stabilizing-labile-aroma-compounds-in-an-oil-in-water-emulsion
#9
Tsung-Shi Yang, Tai-Ti Liu, I-Hwa Lin
The aims of this research were to conjugate chitosan (CT) with stearic acid (SA) and gallic acid (GA), and apply the modified chitosan to stabilize labile aroma compounds such as allyl isothiocyanate (AITC) and limonene in oil-in-water emulsions. Generally, the antioxidant activity of CT-SA-GA increased as the GA content in the conjugate increased. In most assays, GA had a lower IC50 value than that of CT-SA-GA; however, CT-SA-GA exhibited better performance than GA in the Fe(2+)-chelating activity. In accelerated tests (heating or illumination) for evaluating the chemical stability of AITC and limonene during storage, CT-SA and CT-SA-GA were used to prepare AITC and limonene O/W emulsions, respectively...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317056/a-one-pot-route-to-thioamides-discovered-by-gas-phase-studies-palladium-mediated-co2-extrusion-followed-by-insertion-of-isothiocyanates
#10
Asif Noor, Jiawei Li, George N Khairallah, Zhen Li, Hossein Ghari, Allan J Canty, Alireza Ariafard, Paul S Donnelly, Richard A J O'Hair
A new palladium mediated "one pot" synthesis of thioamides from aromatic carboxylic acids (ArCO2H + RNCS → ArC(S)NHR + CO2) was discovered by gas-phase experiments and theoretical studies. Palladium-mediated decarboxylation of aromatic carboxylic acids followed by addition of substituted isothiocyanates leads to the corresponding thioamide derivatives.
March 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28316021/hemin-protects-against-oxygen-glucose-deprivation-induced-apoptosis-activation-via-neuroglobin-in-sh-sy5y-cells
#11
Yun-Jia Wang, Qian-Yi Peng, Song-Yun Deng, Cai-Xia Chen, Long Wu, Li Huang, Li-Na Zhang
This study aimed to investigate the mechanism underlying the neuroprotective effect of hemin in oxygen-glucose deprivation (OGD)-treated neurons. OGD-treated SH-SY5Y cells (human neuroblastoma cells) were used in the study. The cellular viability of SH-SY5Y cells was assessed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, and the cell apoptosis rate was determined by flow cytometry analysis with Annexin V-fluorescein isothiocyanate and propidium iodide staining with or without hemin pretreatment...
March 18, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28315620/3-e-acridin-9-ylmethylidene-amino-1-substituted-thioureas-and-their-biological-activity
#12
Michal Bečka, Mária Vilková, Othman Salem, Jana Kašpárková, Viktor Brabec, Mária Kožurková
This paper describes the synthesis of a novel series of acridine thiosemicarbazones through a two-step reaction between various isothiocyanates and hydrazine followed by treatment with acridin-9-carbaldehyde. The properties of this series of seven new derivatives are studied using NMR and biochemical techniques, and the DNA-binding properties of the compounds are determined using spectrophotometric studies (UV-vis absorption, fluorescence, and circular/linear dichroism) and viscometry. The binding constants K are estimated as being in the range of 2...
March 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28315237/sits-derivatization-of-peptides-to-enhance-266%C3%A2-nm-ultraviolet-photodissociation-uvpd
#13
M Montana Quick, M Rachel Mehaffey, Robert W Johns, W Ryan Parker, Jennifer S Brodbelt
N-terminal derivatization of peptides with the chromogenic reagent 4-acetamido-4-isothiocyanatostilbene-2,2-disulfonic acid (SITS) is demonstrated to enhance the efficiency of 266 nm ultraviolet photodissociation (UVPD). Attachment of the chromophore results in a mass shift of 454 Da and provides significant gains in the number and abundances of diagnostic fragment ions upon UVPD. Activation of SITS-tagged peptides with 266 nm UVPD leads to many fragment ions akin to the a/b/y ions commonly produced by CID, along with other sequence ions (c, x, and z) typically accessed through higher energy pathways...
March 17, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28304236/increased-spontaneous-programmed-cell-death-is-associated-with-impaired-cytokine-secretion-in-peripheral-blood-mononuclear-cells-from-hepatitis-c-virus-positive-patients
#14
Abdulkarim Alhetheel, Ahmed Albarrag, Zahid Shakoor, Khalid Alswat, Ayman Abdo, Waleed Al-Hamoudi, Suliman Alomar
Peripheral blood mononuclear cells (PBMCs) play a critical role in clearing hepatitis C virus (HCV). PBMC defects have been linked with HCV infection; however, the underlying mechanisms remain obscure. We hypothesized that PBMCs of HCV-infected patients are more susceptible to programmed cell death (PCD), and are therefore unable to clear HCV. We compared spontaneous PBMC PCD and cytokine [interleukin (IL)-1, -6, -8, -10, and -12] secretion between untreated (naive) HCV(+) and treated [sustained responder (SR)] patients with HCV, and HCV(-) healthy controls...
March 17, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28304075/steroid-intracochlear-distribution-differs-by-administration-method-systemic-versus-intratympanic-injection
#15
Jong Joo Lee, Jeong Hun Jang, Oak-Sung Choo, Hye Jin Lim, Yun-Hoon Choung
OBJECTIVE: Steroids have been widely used to treat inner-ear diseases such as sudden sensorineural hearing loss, tinnitus, and Meniere's disease. They can be given via either systemic or intratympanic (IT) injection. The purpose of the present study was to explore differences in intracochlear steroid distribution by the administration method employed (systemic vs. IT injection). STUDY DESIGN: Animal study. METHODS: Twenty-three Sprague-Dawley rats were given fluorescein isothiocyanate-labeled dexamethasone (FITC-DEX) three times (on successive days) via intraperitoneal (IP) or IT injection...
March 17, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28303451/improved-intestinal-absorption-of-water-soluble-drugs-by-acetylation-of-g2-pamam-dendrimer-nanocomplexes-in-rat
#16
Chengyun Yan, Jiwei Gu, Yuguang Lv, Weiguo Shi, Hongying Jing
In search of an effective and less toxic absorption enhancer, we synthesized primary amine acetylation of generation 2 polyamidoamine (G2 PAMAM) dendrimer (Ac-G2) by the reaction of G2 PAMAM dendrimer with acetic anhydride, and evaluated the effects of Ac-G2 on the intestinal absorption of poorly absorbable water-soluble drugs using an in situ closed-loop method in rats. The results indicated that Ac50-G2 had a greatest absorption enhancing effect for 5(6)-carboxyfluorescein (CF) in various acetylation levels of G2 PAMAM dendrimers...
March 16, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28302225/-advances-in-research-of-antitumor-mechanisms-of-isothiocyanates
#17
Huimin Wang, Ke Xu
Isothiocyanates (ITCs) are naturally occurring small molecules that are generated by the enzymic hydrolysis of glucosinolate in cruciferous vegetables. Numerous studies showed that ITCs inhibit the growth of tumors by the mechanisms including inducing cell cycle arrest, promoting apoptosis and producing reactive oxygen species in vitro and in vivo. Recent studies showed that ITCs also inhibit metastasis of cancer cells, induce endoplasmic reticulum stress and autophagy. This review summarizes the antitumor mechanisms of ITCs...
March 20, 2017: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/28298689/postharvest-application-of-brassica-meal-derived-allyl-isothiocyanate-to-kiwifruit-effect-on-fruit-quality-nutraceutical-parameters-and-physiological-response
#18
Luisa Ugolini, Laura Righetti, Katya Carbone, Roberta Paris, Lorena Malaguti, Alessandra Di Francesco, Laura Micheli, Mariano Paliotta, Marta Mari, Luca Lazzeri
The use of natural compounds to preserve fruit quality and develop high value functional products deserves attention especially in the growing industry of processing and packaging ready-to-eat fresh-cut fruit. In this work, potential mechanisms underlying the effects of postharvest biofumigation with brassica meal-derived allyl-isothiocyanate on the physiological responses and quality of 'Hayward' kiwifruits were studied. Fruits were treated with 0.15 mg L(-1) of allyl-isothiocyanate vapours for 5 h and then stored in controlled atmosphere (2% O2, 4...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28297774/-effects-of-wild-type-pten-overexpression-and-its-mutation-on-f-actin-in-activated-hepatic-stellate-cells
#19
L S Hao, Y L Liu, G L Zhang, J Chen, X J Song, Y L Wang, J Wang, L M Jin
Objective: To investigate the effect of overexpression of wild-type phosphatase and tensin homolog (PTEN) deleted on chromosome 10 and its mutant G129E (exhibiting the activity of protein phosphatase and losing the activity of lipid phosphatase) on F-actin in activated hepatic stellate cells (HSCs) cultured in vitro. Methods: The activated hepatic stellate cell-T6 (HSC-T6) cells were cultured in vitro, and activated HSCs were transfected with adenovirus that carried wild-type PTEN gene and G129E gene using transient transfection...
January 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28295200/isothiocyanates-are-important-as-haptens-in-contact-allergy-to-chloroprene-rubber
#20
A G Ramzy, K Lammintausta, M Matura, J B Christensson, U Nilsson, L Hagvall
BACKGROUND: Contact allergy to chloroprene rubber products is well known. Thiourea compounds are considered the cause of allergy, despite being non- or weak sensitizers. Diethylthiourea is commonly occurring in this type of products and can decompose to the sensitizer ethyl isothiocyanate. OBJECTIVES: To investigate the clinical importance of degradation products and metabolites from organic thioureas in contact allergy to chloroprene rubber with focus on isothiocyanates and isocyanates...
March 10, 2017: British Journal of Dermatology
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