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https://www.readbyqxmd.com/read/28650140/dual-physically-crosslinked-nanocomposite-hydrogels-reinforced-by-tunicate-cellulose-nanocrystals-with-high-toughness-and-good-self-recoverability
#1
Tiantian Zhang, Tao Zuo, Danning Hu, Chunyu Chang
The weak mechanical properties of hydrogels usually limited their application in biomedical and industrial fields. Herein, we reported a nanocomposite network of poly (acrylic acid-co-acrylamide) (PAAAM) sequentially crosslinked by quaternized tunicate cellulose nanocrystals (Q-TCNCs) and Fe3+. Q-TCNCs acted as both interfacial compatible reinforcements and cross-linkers in the nanocomposite hydrogels to form loose crosslinking, whereas compact crosslinking was built by ionic coordination between Fe3+ and -COO- of PAAAM...
June 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28648042/-effects-of-lappaconitine-on-pain-and-inflammatory-response-of-severely-burned-rats-and-the-mechanism
#2
C L Yang, Z R Wei, T H Zhang, X Q Zeng, B H Wu
Objective: To explore the effects of lappaconitine (LA) on pain and inflammatory response of severely burned rats and the mechanism. Methods: Forty SD rats were divided into healthy+ normal saline group, sham injury+ normal saline group, pure burn group, burn+ LA group, and healthy+ LA group according to the random number table (the same dividing method below), with 8 rats in each group. Rats in pure burn and burn+ LA groups were inflicted with about 32% total body surface area deep partial-thickness scald (hereinafter referred to as burn) on the back and right hind...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28635228/-mechanism-of-long-non-coding-rna-metastasis-associated-lung-adenocarcinoma-transcript-1-induced-invasion-and-metastasis-of-esophageal-cancer-cell-ec-109
#3
Q Q Zhang, Y H Cui, Y Wang, W Z Kou, F Cao, X J Cao, Z H Miao, X H Kang
Objective: To investigate the effect and mechanism of long non-coding RNA-metastasis associated lung adenocarcinoma transcript 1, (LncRNA-MALAT1) on invasion and metastasis of esophageal cancer cell EC-109. Methods: EC-109 cells were transfected with lentiviral vector carrying short hairpin RNA of MALAT1( shRNA-MALAT1) or a nonspecific shRNA control (shRNA-control). The expressions of MALAT1, microRNA-200a, ZEB1 and ZEB2 were detected by qRT-PCR. The effect of shRNA-MALAT1 on invasion of EC-109 cells was determined by transwell assay...
June 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28607026/efficacy-of-a-paromomycin-plus-chloroquine-combination-therapy-in-experimental-cutaneous-leishmaniasis
#4
Gert-Jan Wijnant, Katrien Van Bocxlaer, Vanessa Yardley, Sudaxshina Murdan, Simon Croft
The 4-aminoquinoline chloroquine (CQ) is clinically used in combination with doxycycline to cure chronic Q-fever, as it enhances the activity of the antibiotic against the causative Coxiella burnetii bacteria residing within macrophage phagolysosomes. As there is a similar cellular host-pathogen biology for Leishmania parasites, this study aimed to determine whether such an approach could be also the basis for a new, improved treatment for cutaneous leishmaniasis (CL). We have evaluated the in vitro and in vivo activity of combinations of CQ with standard drugs paromomycin (PM), miltefosine and amphotericin B against Leishmania major and Leishmania mexicana In 72-hour intracellular anti-leishmanial assays, outcomes were variable for different drugs...
June 12, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28558284/characterization-of-pm2-5-exposure-concentration-in-transport-microenvironments-using-portable-monitors
#5
Zhiyuan Li, Wenwei Che, H Christopher Frey, Alexis K H Lau, Changqing Lin
Recently, portable monitors have been increasingly used to quantify air pollutant concentrations at high spatiotemporal resolution. A sampling campaign was conducted to measure the fine particulate matter (PM2.5) and carbon monoxide (CO) exposure concentrations in transport microenvironments (TMEs) in Hong Kong in January and June 2015 using TSI DustTrak and Q-Trak portable monitors. The objectives were to: (1) calibrate DustTrak and Q-Trak; (2) evaluate variability between seasons and microenvironments; (3) estimate indoor/outdoor relationships; and (4) determine minimum sample size...
May 27, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28544569/maintenance-of-the-contractile-phenotype-in-corpus-cavernosum-smooth-muscle-cells-by-myocardin-gene-therapy-ameliorates-erectile-dysfunction-in-bilateral-cavernous-nerve-injury-rats
#6
H-B Zhang, Z-Q Wang, F-Z Chen, W Ding, W-B Liu, Z-R Chen, S-H He, A-Y Wei
The pathophysiology of erectile dysfunction post radical prostatectomy is not clearly clarified, and the low efficacy of traditional PDE5i treatment remains a major complaint in contemporary practice. This study aimed to demonstrate phenotypic modulation in bilateral cavernous nerve injury (BCNI) rats within 7 days, and subsequently validate gene therapy with Myocardin (Mycod) by maintaining a contractile phenotype in corpus cavernosum smooth muscle cells. Initially, 36 male rats were randomly divided into BCNI and negative control (NC) groups for histological and phenotypic molecular measurements at 3, 5, and 7 days...
May 23, 2017: Andrology
https://www.readbyqxmd.com/read/28535648/-effect-of-%C3%AE-40p53-isoform-on-enhancing-the-pro-apoptotic-function-of-p53-in-tumor-cells
#7
B S Wang, H W Zhao, L X Qiao, J Q Shan, Q S Hou, D X Chen, H L Guo
Objective: To investigate the effect of Δ40p53, an alternative spliced isoform of p53 lacking the N-ter minus, on the pro-apoptotic function of p53. Methods: The wild-type p53 was ectopically expressed in HCT116-p53(-/-) (endogenous Δ40p53 expression), HCT116-p53(+ /+) (wild-type p53) and H1299 (p53-null) cells by adenoviral delivery, while Δ40p53 plasmid were transfected into these cells to overexpress Δ40p53. The levels of Δ40p53 and p53 mRNA were detected by reverse transcription-polymerase chain reaction (RT-PCR) and quantitative PCR...
May 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28533893/expression-of-pattern-recognition-receptor-genes-and-mortality-in-patients-with-colorectal-adenocarcinoma
#8
Kathryn E Royse, Liang Chen, David H Berger, Michael M Ittmann, Hashem B El-Serag, Courtney J Balentine, David Y Graham, Peter A Richardson, Rolando E Rumbaut, Xiaoyun Shen, Donna L White, Li Jiao
Toll-like receptors (TLRs) and the receptor for advanced glycation end products (AGER) are pattern recognition receptors that regulate intestinal inflammatory homeostasis. However, their relevance in colorectal cancer (CRC) prognosis is unclear. We investigated expression of TLRs, AGER, and interacting proteins in association with CRC mortality in a retrospective cohort study of 65 males diagnosed with primary resectable CRC between 2002 and 2009. Multiplex quantitative nuclease protection assay was used to quantify the expression of 19 genes in archived tissues of tumor and paired adjacent normal mucosa...
2017: International Journal of Molecular Epidemiology and Genetics
https://www.readbyqxmd.com/read/28530402/spin-crossover-in-double-salts-containing-six-and-four-coordinate-cobalt-ii-ions
#9
Joanna Palion-Gazda, Barbara Machura, Rafal Kruszynski, Thais Grancha, Nicolás Moliner, Francesc Lloret, Miguel Julve
The preparation and spectroscopic and structural characterization of three cobalt(II) complexes of formulas [Co(tppz)2](dca)2 (1), [Co(tppz)2][Co(NCS)4]·MeOH (2), and [Co(tppz)2][Co(NCO)4]·2H2O (3) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and dca = dicyanamide] are reported here. Compounds 1-3 have in common the presence of the cationic [Co(tppz)2](2+) entity where each mer-tridentate tppz ligand coordinates to the cobalt(II) ion equatorially through two pyridyl donors and axially via the pyrazine, completing the six-coordination...
May 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28494786/compositionally-and-functionally-distinct-sinus-microbiota-in-chronic-rhinosinusitis-patients-have-immunological-and-clinically-divergent-consequences
#10
Emily K Cope, Andrew N Goldberg, Steven D Pletcher, Susan V Lynch
BACKGROUND: Chronic rhinosinusitis (CRS) is a heterogeneous disease characterized by persistent sinonasal inflammation and sinus microbiome dysbiosis. The basis of this heterogeneity is poorly understood. We sought to address the hypothesis that a limited number of compositionally distinct pathogenic bacterial microbiota exist in CRS patients and invoke discrete immune responses and clinical phenotypes in CRS patients. RESULTS: Sinus brushings from patients with CRS (n = 59) and healthy individuals (n = 10) collected during endoscopic sinus surgery were analyzed using 16S rRNA gene sequencing, predicted metagenomics, and RNA profiling of the mucosal immune response...
May 12, 2017: Microbiome
https://www.readbyqxmd.com/read/28482443/-effects-of-cell-to-cell-communication-and-histone-acetyltransferase-on-the-change-of-osteogenic-differentiation-ability-among-single-cell-clones-from-healthy-periodontium-with-heterogeneity-of-osteogenic-differentiation-abilities
#11
D D Fei, B Li, F Gao, A Q Liu, Y Jin, Q T Wang
Objective: To investigate the effect of cell-to-cell communication amongst single-cell clones from healthy periodontium with different osteogenic differentiation potentials on change of osteogenic differentiation capabilities and the role histone acetyltransferase partaken in this process. Methods: In order to research the change of osteogenic differentiation ability via cell-to-cell communication, indirect co-culture method was used by placing two single-cell clones with different osteogenesis potentials in each of the 6-well plates...
May 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28480405/potential-administration-of-lipoic-acid-and-coenzyme-q-against-adipogensis-target-for-weight-reduction
#12
Maryam A Al-Ghamdi, Hani Choudhry, Huda A Al-Doghather, Etimad H Huwait, Taha A Kumosani, Said S Moselhy
BACKGROUND: Body overweight and obesity were considered as a risk factor for many systemic diseases as diabetic hypertension, cardiovascular diseases, and some cancers. The lipoic acid and Co Q are considered as coenzymes needed for enhancement metabolic rate. The goal of this study is to evaluate the anti-obese effect of lipoic acid alone or combined with Co-Q in rats. MATERIALS AND METHODS: Ninety male albino rats (100-150g) were used in this study, divided into six groups (15 each)...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28459468/oncogenic-kras-associated-gene-signature-defines-co-targeting-of-cdk4-6-and-mek-as-a-viable-therapeutic-strategy-in-colorectal-cancer
#13
M Pek, S M J M Yatim, Y Chen, J Li, M Gong, X Jiang, F Zhang, J Zheng, X Wu, Q Yu
Therapeutic strategies against KRAS mutant colorectal cancers are developed using cell line models, which do not accurately represent the transcriptome driven by oncogenic KRAS in tumors. We sought to identify a KRAS-associated gene signature from colorectal tumors to develop a precise treatment strategy. Integrative analysis of quantitative KRAS mutation detection and matched gene expression profiling in 55 CRC bulk tumors was carried out to define a gene signature enriched in CRC tumors with high KRAS mutation...
May 1, 2017: Oncogene
https://www.readbyqxmd.com/read/28447457/co3o4-%C3%AE-quantum-dots-as-a-highly-efficient-oxygen-evolution-reaction-catalyst-for-water-splitting
#14
Guangxing Zhang, Jie Yang, Han Wang, Haibiao Chen, Jinlong Yang, Feng Pan
Co3O4-δ quantum dots (Co3O4-δ-QDs) with a crystallite size of approximately 2 nm and oxygen vacancies were fabricated through multicycle lithiation/delithiation of mesoporous Co3O4 nanosheets. Used as an oxygen evolution reaction (OER) electrocatalyst for water splitting, the catalytic performance (an overpotential of 270 mV@10 mA cm(-2) and no decay within 30 h) of Co3O4-δ-QDs is superior to that of previously reported Co-based catalysts and the state-of-the-art IrO2. Compared to that of the Co3O4 nanosheets, the enhanced OER activity of Co3O4-δ-QDs is attributed to two factors: one is the increased quantity of the Faradaic active sites, including the total active sites (q*Total), the most accessible active sites (q*Outer), and their ratio (q*Outer/q*Total); the other is the enhanced intrinsic electroactivity per active site evaluated by the turnover frequency and the current density normalized by the most accessible active sites (j/q*Outer) related to the OER...
May 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28436944/active-and-poised-promoter-states-drive-folding-of-the-extended-hoxb-locus-in-mouse-embryonic-stem-cells
#15
Mariano Barbieri, Sheila Q Xie, Elena Torlai Triglia, Andrea M Chiariello, Simona Bianco, Inês de Santiago, Miguel R Branco, David Rueda, Mario Nicodemi, Ana Pombo
Gene expression states influence the 3D conformation of the genome through poorly understood mechanisms. Here, we investigate the conformation of the murine HoxB locus, a gene-dense genomic region containing closely spaced genes with distinct activation states in mouse embryonic stem (ES) cells. To predict possible folding scenarios, we performed computer simulations of polymer models informed with different chromatin occupancy features that define promoter activation states or binding sites for the transcription factor CTCF...
June 2017: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/28395474/-association-between-air-pollution-and-cognitive-function-in-the-elderly
#16
J N Wang, Q Wang, T T Li, X M Shi
Cognition disorders is one of the most important factors affecting the elderly. Impaired cognitive function caused by the elderly daily self-care ability decreased, the elderly in China cause serious social, psychological and economic burden. The purpose of this review is to summarize the current evidence on main air pollutants(SO(2), NO(2), CO, PM(2.5) and PM(10), black carbon)and cognitive function in elderly. The study found that exposure to air pollution, especially particulate matter, is associated with cognitive disorders n in the elderly...
April 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28383711/synergistic-effect-of-regulatory-t-cells-and-proinflammatory-cytokines-in-angiogenesis-in-the-endometriotic-milieu
#17
Xiao-Qiu Wang, Wen-Jie Zhou, Xue-Zhen Luo, Yu Tao, Da-Jin Li
STUDY QUESTION: Do regulatory T cells (Tregs) contribute to angiogenesis in endometriosis? SUMMARY ANSWER: High levels of CCL17 and CCL22 cause the recruitment of Tregs, upregulate the immunosuppression of Tregs and, in turn, may promote angiogenesis in endometrial cells in synergy with proinflammatory cytokines. WHAT IS ALREADY KNOWN: The peritoneal fluid of patients with endometriosis has a higher percentage of Tregs than that of normal individuals; however, the regulatory role of Tregs in the disease remains unclear...
June 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28368413/co-amplification-of-phosphoinositide-3-kinase-enhancer-a-and-cyclin-dependent-kinase-4-triggers-glioblastoma-progression
#18
Q Qi, S S Kang, S Zhang, C Pham, H Fu, D J Brat, K Ye
Glioblastoma (GBM) is the most common primary brain tumor and has a dismal prognosis. Amplification of chromosome 12q13-q15 (Cyclin-dependent kinase 4 (CDK4) amplicon) is frequently observed in numerous human cancers including GBM. Phosphoinositide 3-kinase enhancer (PIKE) is a group of GTP-binding proteins that belong to the subgroup of centaurin GTPase family, encoded by CENTG1 located in CDK4 amplicon. However, the pathological significance of CDK4 amplicon in GBM formation remains incompletely understood...
April 3, 2017: Oncogene
https://www.readbyqxmd.com/read/28346429/deletion-of-endothelial-cell-specific-liver-kinase-b1-increases-angiogenesis-and-tumor-growth-via-vascular-endothelial-growth-factor
#19
W Zhang, Y Ding, C Zhang, Q Lu, Z Liu, K Coughlan, I Okon, M-H Zou
Liver kinase B1 (LKB1) is a serine/threonine protein kinase ubiquitously expressed in mammalian cells. It was first identified in Peutz-Jeghers syndrome as a tumor suppressor gene. Whether endothelial LKB1 regulates angiogenesis and tumor growth is unknown. In this study, we generated endothelial cell-specific LKB1-knockout (LKB1(endo-/-)) mice by crossbreeding vascular endothelial-cadherin-Cre mice with LKB1(flox/flox) mice. Vascular endothelial growth factor (VEGF) level was highly co-stained in endothelial cells but not in macrophages in LKB1(endo-/-) mice...
March 27, 2017: Oncogene
https://www.readbyqxmd.com/read/28345929/utility-of-cyp3a4-and-pxr-car-cyp3a4-3a7-transgenic-mouse-models-to-assess-the-magnitude-of-cyp3a4-mediated-drug-drug-interactions
#20
Justin Q Ly, Kirsten Messick, Ann Qin, Ryan H Takahashi, Edna F Choo
Species differences in the expression, activity, regulation, and substrate specificity of metabolizing enzymes preclude the use of animal models to predict clinical drug-drug interactions (DDIs). The objective of this work is to determine if the transgenic (Tg) Cyp3a(-/-)Tg-3A4Hep/Int and Nr1i2/Nr1i3(-/-)-Cyp3a(-/-)Tg-PXR-CAR-3A4/3A7Hep/Int (PXR-CAR-CYP3A4/3A7) mouse models could be used to predict in vivo DDI of 10 drugs; alprazolam, bosutinib, crizotinib, dasatinib, gefitinib, ibrutinib, regorafenib, sorafenib, triazolam, and vandetinib (as victims); with varying magnitudes of reported CYP3A4 clinical DDI...
April 7, 2017: Molecular Pharmaceutics
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