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https://www.readbyqxmd.com/read/28440480/palmitate-impairs-angiogenesis-via-suppression-of-cathepsin-activity
#1
Jin Zhang, Ying Shan, Yong Li, Xinping Luo, Haiming Shi
Angiogenesis requires the interaction of multiple variable factors to promote endothelial cell adhesion, migration and survival. Palmitate, a free fatty acid, exhibits an anti‑angiogenic effect via interference with endothelial cell function, whereas cysteine proteases are important in protein turnover and are termed positive modulators of neovascularization. However, the association between these two factors regarding the regulation of human endothelial cell function remains to be elucidated. By using cell counting kit‑8, the Transwell method and an annexin V‑fluorescein isothiocyanate/propidium iodide apoptosis detection kit, the present study reported that high levels of palmitate result in a significant decrease in endothelial cell proliferation and invasion, and induced cell apoptosis; cathepsin L and S inhibitors may suppress palmitate‑induced apoptosis...
April 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440451/ppar%C3%AE-activation-protects-h9c2-cardiomyoblasts-from-lps%C3%A2-induced-apoptosis-through-the-heme-oxygenase%C3%A2-1%C3%A2-mediated-suppression-of-nf%C3%A2-%C3%AE%C2%BAb-activation
#2
Yao Shi, Hong Jiang, Xiaobo Yang
The aim of the present study was to investigate the protective effect of the selective peroxisome proliferator-activated receptor δ (PPARδ) agonist GW501516 (GW) on lipopolysaccharide (LPS)‑induced apoptosis in the rat cardiomyoblast cell line H9c2, and to investigate the possible underlying mechanisms. Cell viability was estimated using the MTT assay. Apoptosis was estimated by flow cytometry using Annexin V‑fluorescein isothiocyanate/propidium iodide staining and caspase‑3 activity assay. The protein level of heme oxygenase‑1 (HO‑1), cleaved caspase‑3 (CC3), apoptosis regulator Bcl‑2 (bcl‑2), apoptosis regulator BAX (bax) and nuclear factor‑κB (NF‑κB) p65 was measured by western blot analysis...
April 19, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28439590/competition-based-quantitative-chemical-proteomics-in-breast-cancer-cells-identifies-new-target-profiles-for-sulforaphane
#3
James A Clulow, Elisabeth M Storck, Thomas Lanyon-Hogg, Karunakaran A Kalesh, Lyn H Jones, Edward W Tate
Sulforaphane is a small molecule isothiocyanate which exhibits anticancer potential, yet its biological targets remain poorly understood. Here we employ a competition-based chemical proteomics strategy to profile sulforaphane's targets and identify over 500 targets along with their relative affinities. These targets provide a new set of mediators for sulforaphane's bioactivity, and aid understanding of its complex mode of action.
April 25, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28436674/general-dialdehyde-click-chemistry-for-amine-bioconjugation
#4
Sina Elahipanah, Paul J O'Brien, Dmitry Rogozhnikov, Muhammad N Yousaf
The development of methods for conjugating a range of molecules to primary amine functional groups has revolutionized the fields of chemistry, biology, and material science. The primary amine is a key functional group and one of the most important nucleophiles and bases used in all of synthetic chemistry. Therefore, tremendous interest in the synthesis of molecules containing primary amines and strategies to devise chemical reactions to react with primary amines has been at the core of chemical research. In particular, primary amines are a ubiquitous functional group found in biological systems as free amino acids, as key side chain lysines in proteins, and in signaling molecules and metabolites and are also present in many natural product classes...
April 24, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28434989/colorimetric-detection-of-microrna-based-hybridization-chain-reaction-for-signal-amplification-and-enzyme-for-visualization
#5
Na Ying, Taifan Sun, Zhibao Chen, Guangping Song, Bingyao Qi, Shengjun Bu, Xiuwei Sun, Jiayu Wan, Zehong Li
MicroRNAs (miRNAs) have key roles in gene expression and can be employed as biomarkers for early diagnosis of various diseases, especially cancers. Detection of miRNAs remains challenging and often requires detection platforms. Here, a horseradish peroxidase (HRP)-assisted hybridization chain reaction (HCR) for colorimetric detection of miR-155 was described. In the presence of target miRNA, the capture probe immobilized on the microplate sandwiched the target miR-155 with the 3' end of the reporter probe. Another exposed part of the RP at the 5'end triggered HCR producing double-stranded DNA polymers with multiple fluorescein isothiocyanates (FITC) for signal amplification...
April 20, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28431970/effects-of-natural-and-synthetic-isothiocyanate-based-h2s-releasers-against-chemotherapy-induced-neuropathic-pain-role-of-kv7-potassium-channels
#6
Lorenzo Di Cesare Mannelli, Elena Lucarini, Laura Micheli, Ilaria Mosca, Paolo Ambrosino, Maria Virginia Soldovieri, Alma Martelli, Lara Testai, Maurizio Taglialatela, Vincenzo Calderone, Carla Ghelardini
Hydrogen sulfide (H2S) is a crucial signaling molecule involved in several physiological and pathological processes. Nonetheless, the role of this gasotransmitter in the pathogenesis and treatment of neuropathic pain is controversial. The aim of the present study was to investigate the pain relieving profile of a series of slow releasing H2S donors (the natural allyl-isothiocyanate and the synthetics phenyl- and carboxyphenyl-isothiocyanate) in animal models of neuropathic pain induced by paclitaxel or oxaliplatin, anticancer drugs characterized by a dose-limiting neurotoxicity...
April 18, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28428038/non-invasive-tracking-of-hydrogel-degradation-using-upconversion-nanoparticles
#7
Yuqing Dong, Guorui Jin, Changchun Ji, Rongyan He, Min Lin, Xin Zhao, Ang Li, Tian Jian Lu, Feng Xu
Tracking the distribution and degradation of hydrogels in vivo is important for various applications including tissue engineering and drug delivery. Among various imaging modalities, fluorescence imaging has attracted intensive attention due to their high sensitivity, low cost and easy operation. Particularly, upconversion nanoparticles (UCNPs) that emit visible lights upon near-infrared (NIR) light excitation as tracking probes are promising in deciphering the fate of hydrogels after transplantation. Herein, we reported a facile and non-invasive in vivo hydrogel tracking method using UCNPs, where the degradation of hydrogels was determined using the decrease in fluorescence intensity from the UCNPs encapsulated in the hydrogels...
April 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28423681/sulforaphane-for-the-chemoprevention-of-bladder-cancer-molecular-mechanism-targeted-approach
#8
REVIEW
Andrew Leone, Gregory Diorio, Wade Sexton, Michael Schell, Mark Alexandrow, Jed W Fahey, Nagi B Kumar
The clinical course for both early and late stage Bladder Cancer (BC) continues to be characterized by significant patient burden due to numerous occurrences and recurrences requiring frequent surveillance strategies, intravesical drug therapies, and even more aggressive treatments in patients with locally advanced or metastatic disease. For these reasons, BC is also the most expensive cancer to treat. Fortunately, BC offers an excellent platform for chemoprevention interventions with potential to optimize the systemic and local exposure of promising agents to the bladder mucosa...
March 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423628/benzyl-isothiocyanate-induces-reactive-oxygen-species-initiated-autophagy-and-apoptosis-in-human-prostate-cancer-cells
#9
Ji-Fan Lin, Te-Fu Tsai, Shan-Che Yang, Yi-Chia Lin, Hung-En Chen, Kuang-Yu Chou, Thomas I-Sheng Hwang
Benzyl isothiocyanate (BITC) in cruciferous plants, which are part of the human diet, has been shown to induce apoptosis in various types of cancer. In this study, we show that BITC effectively suppresses the growth of cultured human prostate cancer cells (CRW-22Rv1 and PC3) by causing mitochondrial membrane potential loss, caspase 3/7 activation and DNA fragmentation. Furthermore, BITC induces ROS generation in these cells. The induction of apoptosis by BITC was significantly attenuated in the presence of N-acetylcysteine (NAC) and catalase (CAT), well-studied ROS scavengers...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422158/isothiocyanates-induce-ugt1a1-in-humanized-ugt1-mice-in-a-car-dependent-fashion-that-is-highly-dependent-upon-oxidative-stress
#10
Emiko Yoda, Miles Paszek, Camille Konopnicki, Ryoichi Fujiwara, Shujuan Chen, Robert H Tukey
Isothiocyanates, such as phenethyl isothiocyanate (PEITC), are formed following the consumption of cruciferous vegetables and generate reactive oxygen species (ROS) that lead to the induction of cytoprotective genes such as the UDP-glucuronosyltransferases (UGTs). The induction of ROS activates the Nrf2-Keap 1 pathway leading to the induction of genes through antioxidant response elements (AREs). UGT1A1, the sole enzyme responsible for the metabolism of bilirubin, can be induced following activation of Nrf2...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422155/in-vitro-biocompatibility-study-of-sub-5%C3%A2-nm-silica-coated-magnetic-iron-oxide-fluorescent-nanoparticles-for-potential-biomedical-application
#11
Sabrina Foglia, Mario Ledda, Daniela Fioretti, Giovanna Iucci, Massimiliano Papi, Giovanni Capellini, Maria Grazia Lolli, Settimio Grimaldi, Monica Rinaldi, Antonella Lisi
Magnetic iron oxide nanoparticles (IONPs), for their intriguing properties, have attracted a great interest as they can be employed in many different biomedical applications. In this multidisciplinary study, we synthetized and characterized ultrafine 3 nm superparamagnetic water-dispersible nanoparticles. By a facile and inexpensive one-pot approach, nanoparticles were coated with a shell of silica and contemporarily functionalized with fluorescein isothiocyanate (FITC) dye. The obtained sub-5 nm silica-coated magnetic iron oxide fluorescent (sub-5 SIO-Fl) nanoparticles were assayed for cellular uptake, biocompatibility and cytotoxicity in a human colon cancer cellular model...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420123/stability-of-bioactive-compounds-in-broccoli-as-affected-by-cutting-styles-and-storage-time
#12
Ana Mariel Torres-Contreras, Vimal Nair, Luis Cisneros-Zevallos, Daniel A Jacobo-Velázquez
Broccoli contains bioactive molecules and thus its consumption is related with the prevention of chronic and degenerative diseases. The application of wounding stress to horticultural crops is a common practice, since it is the basis for the fresh-cut produce industry. In this study, the effect of four different cutting styles (CSs) (florets (CS1), florets cut into two even pieces (CS2), florets cut into four even pieces (CS3), and florets processed into chops (CS4)) and storage time (0 and 24 h at 20 °C) on the content of bioactive compounds in broccoli was evaluated...
April 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28419960/preferentially-enhancing-anti-cancer-isothiocyanates-over-glucosinolates-in-broccoli-sprouts-how-nacl-and-salicylic-acid-affect-their-formation
#13
Azadeh Esfandiari, Ali Saei, Marian J McKenzie, Adam J Matich, Mesbah Babalar, Donald A Hunter
Broccoli (Brassica oleracea L. var. italica) sprouts contain glucosinolates (GLs) that when hydrolysed yield health promoting isothiocyanates such as sulforaphane (SF). SF content can be increased by salt (NaCl) stress, although high salt concentrations negatively impact plant growth. Salicylic acid (SA) treatments can attenuate the negative effects of salt on growth. To test whether sprout isothiocyanate content could be elevated without sprout growth being compromised, broccoli seed were germinated and grown for seven days in salt (0, 80 and 160 mM) alone and in combination with 100 μM SA...
April 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28419923/development-and-applications-of-two-colorimetric-and-fluorescent-indicators-for-hg-2-detection
#14
Ying Long, Mei-Pan Yang, Bing-Qin Yang
Two rhodamine-active probes RBAI (Rhodamine B-di-Aminobenzene-phenyl Isothiocyanate) and RGAI (Rhodamine 6G-di-Aminobenzene-phenyl Isothiocyanate) were designed, synthesized and characterized. The probes were developed as fluorescent and colorimetric chemodosimeters in ethanol-water solution with a broad pH span (5-10) and high selectivity toward Hg(2+) but no significant response toward other common competitive cations. The Hg(2+)-promoted ring opening of spirolactam of the rhodamine moiety induced cyclic guanylation of the thiourea moiety, which resulted in the dual chromo- and fluorogenic observation (off-on)...
April 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28414435/synthesis-of-bodipy-peptide-conjugates-for-fluorescence-labeling-of-egfr-over-expressing-cells
#15
Ning Zhao, Tyrslai Williams, Zehua Zhou, Frank R Fronczek, Martha Sibrian-Vazquez, Seetharama Jois, M Graca Henriques Vicente
Regioselective functionalization of 2,3,5,6,8-pentachloro-BODIPY 1 produced unsymmetric BODIPY 5, bearing an isothiocyanate group suitable for conjugation, in only four steps. The X-ray structure of 5 reveals a nearly planar BODIPY core with aryl dihedral angles in the range 47.4° - 62.9°. Conjugation of 5 to two EGFR-targeting pegylated peptides, 3PEG-LARLLT (6) and 3PEG-GYHWYGYTPQNVI (7), under mild conditions (30 min at room temperature), afforded BODIPY conjugates 8 and 9 in 50-80% isolated yields. These conjugates show red-shifted absorption and emission spectra compared with 5, in the near-IR region, and were evaluated as potential fluorescence imaging agents for EGRF over-expressing cells...
April 17, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28413458/mir-9-functions-as-a-tumor-inhibitor-of-cell-proliferation-in-epithelial-ovarian-cancer-through-targeting-the-sdf-1-cxcr4-pathway
#16
Lin He, Li Zhang, Mengfei Wang, Wenrong Wang
The current study aimed to investigate the potential role of miR-9 in the inhibition of ovarian cancer progression through the stromal cell-derived factor-1 (SDF-1)/ C-X-C chemokine receptor type 4 (CXCR4) pathway and to provide a theoretical basis for the diagnosis and treatment of ovarian cancer. Human ovarian cancer OVCAR-3 cells were transfected with miR-9 short hairpin RNA (shRNA). The effect of miR-9 on the mRNA expression levels of CXCR4 were analyzed using reverse transcription-quantitative polymerase chain reaction...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28411859/cd14-plays-a-protective-role-in-experimental-inflammatory-bowel-disease-by-enhancing-intestinal-barrier-function
#17
Stephanie Buchheister, Manuela Buettner, Marijana Basic, Andreas Noack, Gerhard Breves, Barbara Buchen, Lydia M Keubler, Christoph Becker, André Bleich
Intestinal homeostasis disturbance through intestinal barrier disruption presumably plays a key role in inflammatory bowel disease (IBD) development. Genetic and candidate gene analyses in an Il10-deficient IBD mouse model system identified Cd14 as a potentially protective candidate gene. The role of Cd14 in colitis development was determined using dextran sulfate sodium (DSS)-induced acute and an Il10-deficiency-induced chronic model of intestinal inflammation. Intestinal permeability was investigated by fluorescein isothiocyanate-dextran uptake assay, quantitative RT-PCR analysis of tight junction proteins, myosin light chain kinase, and proinflammatory cytokine expression...
April 5, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28408783/prokaryotic-expression-of-the-extracellular-domain-of-porcine-programmed-death-1-pd-1-and-its-ligand-pd-l1-and-identification-of-the-binding-with-peripheral-blood-mononuclear-cells-in-vitro
#18
Yan-Ping Zhu, Feng Yue, Yong He, Peng Li, Yuan Yang, Yu-Ting Han, Yan-Fang Zhang, Guo-Peng Sun, Dong-Guang Guo, Mei Yin, Xuan-Nian Wang
Programmed cell death protein 1 (PD-1), a costimulatory molecule of the CD28 family, has 2 ligands, PD-L1 and PD-L2. Our previous studies showed that the expression of PD-1 and PD-L1 is up-regulated during viral infection in pigs. Extensive studies have shown that blockade of the PD-1/PD-L1 pathways by anti-PD-L1 antibody or soluble PD-1 restores exhausted T-cells in humans and mice. In the present study the extracellular domains of PD-1 and PD-L1 were used to evaluate the binding of PD-1 and PD-L1 with peripheral blood mononuclear cells (PBMCs)...
April 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/28408328/trpa1-expression-levels-and-excitability-brake-by-kv-channels-influence-cold-sensitivity-of-trpa1-expressing-neurons
#19
Tosifa Memon, Kevin Chase, Lee S Leavitt, Baldomero M Olivera, Russell W Teichert
The molecular sensor of innocuous (painless) cold sensation is well-established to be transient receptor potential cation channel, subfamily M, member 8 (TRPM8). However, the role of transient receptor potential cation channel, subfamily A, member 1 (TRPA1) in noxious (painful) cold sensation has been controversial. We find that TRPA1 channels contribute to the noxious cold sensitivity of mouse somatosensory neurons, independent of TRPM8 channels, and that TRPA1-expressing neurons are largely non-overlapping with TRPM8-expressing neurons in mouse dorsal-root ganglia (DRG)...
April 10, 2017: Neuroscience
https://www.readbyqxmd.com/read/28406431/prevention-of-oxidized-low-density-lipoprotein-induced-endothelial-cell-injury-by-da-plga-peg-crgd-nanoparticles-combined-with-ultrasound
#20
Zhaojun Li, Hui Huang, Lili Huang, Lianfang Du, Ying Sun, Yourong Duan
In general, atherosclerosis is considered to be a form of chronic inflammation. Dexamethasone has anti-inflammatory effects in atherosclerosis, but it was not considered for long-term administration on account of a poor pharmacokinetic profile and adverse side effects. Nanoparticles in which drugs can be dissolved, encapsulated, entrapped or chemically attached to the particle surface have abilities to incorporate dexamethasone and to be used as controlled or targeted drug delivery system. Long circulatory polymeric nanoparticles present as an assisting approach for controlled and targeted release of the encapsulated drug at the atherosclerotic site...
April 13, 2017: International Journal of Molecular Sciences
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