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https://www.readbyqxmd.com/read/29040954/design-synthesis-and-biological-evaluation-of-substituted-aminopyridazin-3-2h-ones-as-g0-g1-phase-arresting-agents-with-apoptosis-inducing-activities
#1
Bing-Chen Ge, Hong-Fang Feng, Yu-Fang Cheng, Hai-Tao Wang, Bao-Ming Xi, Xue-Mei Yang, Jiang-Ping Xu, Zhong-Zhen Zhou
A series of aminopyridazin-3(2H)-one derivatives has been designed and synthesized. Their antiproliferative activities were evaluated against three human cancer cell lines (SH-SY5Y human neuroblastoma, K562 human myelogenous leukemia and AGS gastric cancer cell lines) using the MTT assay. The preliminary activity test displayed that compound 8a exhibited comparable activities against all test cells with the positive control fluorouracil. Meanwhile compounds 8b, 8e and 9c-e displayed selective antiproliferative activities for SH-SY5Y cells...
October 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29040655/effects-of-1950-mhz-radiofrequency-electromagnetic-fields-on-a%C3%AE-processing-in-human-neuroblastoma-and-mouse-hippocampal-neuronal-cells
#2
Jeongyeon Park, Jong Hwa Kwon, Nam Kim, Kiwon Song
Alzheimer's disease (AD) is a neurodegenerative disease leading to progressive loss of memory and other cognitive functions. One of the well-known pathological markers of AD is the accumulation of amyloid-beta protein (Aβ), and its plaques, in the brain. Recent studies using Tg-5XFAD mice as a model of AD have reported that exposure to radiofrequency electromagnetic fields (RF-EMF) from cellular phones reduced Aβ plaques in the brain and showed beneficial effects on AD. In this study, we examined whether exposure to 1950 MHz RF-EMF affects Aβ processing in neural cells...
October 6, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/29036829/microrna-221-targets-adam10-mrna-and-is-downregulated-in-alzheimer-s-disease
#3
Patricia R Manzine, Silvia Pelucchi, Maria A Horst, Francisco A C Vale, Sofia C I Pavarini, Matteo Audano, Nico Mitro, Monica Di Luca, Elena Marcello, Marcia R Cominetti
ADAM10 is the α-secretase that cleaves amyloid-β protein precursor in the non-amyloidogenic pathway in Alzheimer's disease (AD) and is known to be regulated by different microRNAs (miRNAs), which are post-transcriptional regulators related to several biological and pathological processes, including AD. Here we proposed to explore and validate miRNAs that have direct or indirect relations to the AD pathophysiology and ADAM10 gene. Approximately 700 miRNAs were analyzed and 21 differentially expressed miRNAs were validated in a sample of 21 AD subjects and 17 cognitively healthy matched controls...
October 7, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29036449/resveratrol-attenuates-bone-cancer-pain-through-regulating-the-expression-levels-of-asic3-and-activating-cell-autophagy
#4
Haili Zhu, Jieqiong Ding, J Wu, Tingting Liu, Jing Liang, Qiong Tang, Ming Jiao
Bone cancer pain (BCP) is one of the most common pains in patients with malignant cancers. The mechanism underlying BCP is largely unknown. Our previous studies and the increasing evidence both have shown that acid-sensing ion channels 3 (ASIC3) is an important protein in the pathological pain state in some pain models. We hypothesized that the expression change of ASIC3 might be one of the factors related to BCP. In this study, we established the BCP model through intrathecally injecting rat mammary gland carcinoma cells (MRMT-1) into the left tibia of Sprague-Dawley female rats, and found that the BCP rats showed bone destruction, increased mechanical pain sensitivities and up-regulated ASIC3 protein expression levels in L4-L6 dorsal root ganglion...
October 3, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29036157/nonlinear-spline-wavefront-reconstruction-from-shack-hartmann-intensity-measurements-through-small-aberration-approximations
#5
Elisabeth Brunner, Cornelis C de Visser, Michel Verhaegen
We propose an extension of the Spline based ABerration Reconstruction (SABRE) method to Shack-Hartmann (SH) intensity measurements, through small aberration approximations of the focal spot models. The original SABRE for SH slope measurements is restricted to the use of linear spline polynomials, due to the limited amount of data, and the resolution of its reconstruction is determined by the number of lenslets. In this work, a fast algorithm is presented that directly processes the pixel information of the focal spots, allowing the employment of nonlinear polynomials for high accuracy reconstruction...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29035776/dammarane-type-saponins-from-the-leaves-of-panax-notoginseng-and-their-neuroprotective-effects-on-damaged-sh-sy5y-cells
#6
Xin-Yi Liu, Shan Wang, Chuang-Jun Li, Jie Ma, Fang-You Chen, Ying Peng, Xiao-Liang Wang, Dong-Ming Zhang
Seven dammarane-type saponins previously undescribed (notoginsenosides Fh1-Fh7) were isolated from the aqueous extract leaves of Panax notoginseng (Burk.) F.H.Chen (Araliaceae), together with eleven known saponins. Their structures of were elucidated by spectroscopic analysis (NMR, UV, IR, ect.), HR-ESI-MS techniques and chemical methods. Screening results indicated that compounds 4, 5, 12, 13 showed moderate neuroprotective effects on H2O2-induced cellular damage in human neuroblastoma SH-SY5Y cells (10 μM)...
October 13, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29034199/cardioprotective-effects-of-achillea-wilhelmsii-on-the-isolated-rat-heart-in-ischemia-reperfusion
#7
M Mahmoudabady, M Lashkari, S Niazmand, M Soukhtanloo
CONTEXT: There are some reports about protective effects of Achillea on the heart. OBJECTIVE: We investigated the effect of Achillea wilhelmsii extract on cardiac function during ischemia-reperfusion (I/R) injury in the isolated rat heart. MATERIALS AND METHODS: 60 male Wistar rats were randomly divided into 6 groups; 1: Control group, 2: Control-ischemia (CI) 3: vitamin C (10 mg/kg), 4-6: Extract groups (E 100, E 200 and E 400 mg/kg). The animals received normal saline, vitamin C or A...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29033430/the-prevalence-of-japanese-outpatients-with-hypertension-who-meet-the-definition-of-treatment-resistant-hypertension-and-are-eligible-for-enrolment-in-clinical-trials-of-endovascular-ultrasound-renal-denervation
#8
Keisuke Okamura, Kazuyuki Shirai, Tetsu Okuda, Hidenori Urata
Objective A clinical trial (REQUIRE) was started to investigate the use of an ultrasound renal denervation system in the treatment of resistant hypertension (RHT). We analyzed the prevalence of patients who were eligible for inclusion in this cross-sectional study at the time of screening. Methods Nine-hundred ninety-nine consecutive hypertension (HT) patients who were treated in our hospital as outpatients were classified into the following categories: patients treated with at least 3 types of antihypertensive drugs including diuretic agents who were eligible for enrolment in SYMPLICITY HTN-Japan (SH-J) with an office systolic blood pressure (SBP) of ≥160 mmHg, who were ≤80 years of age, and an eGFR of ≥45 mL/min/1...
October 16, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29033219/sherwood-correlation-for-dissolution-of-pooled-napl-in-porous-media
#9
Derya Aydin Sarikurt, Cagri Gokdemir, Nadim K Copty
The rate of interphase mass transfer from non-aqueous phase liquids (NAPLs) entrapped in the subsurface into the surrounding mobile aqueous phase is commonly expressed in terms of Sherwood (Sh) correlations that are expressed as a function of flow and porous media properties. Because of the lack of precise methods for the estimation of the interfacial area separating the NAPL and aqueous phases, most studies have opted to use modified Sherwood expressions that lump the interfacial area into the interphase mass transfer coefficient...
October 4, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/29032463/kit-w-sh-mutation-prevents-cancellous-bone-loss-during-calcium-deprivation
#10
Sutada Lotinun, Jaijam Suwanwela, Suchit Poolthong, Roland Baron
Calcium is essential for normal bone growth and development. Inadequate calcium intake increases the risk of osteoporosis and fractures. Kit ligand/c-Kit signaling plays an important role in regulating bone homeostasis. Mice with c-Kit mutations are osteopenic. The present study aimed to investigate whether impairment of or reduction in c-Kit signaling affects bone turnover during calcium deprivation. Three-week-old male WBB6F1/J-Kit (W) /Kit (W-v) /J (W/W (v) ) mice with c-Kit point mutation, Kit (W-sh) /HNihrJaeBsmJ (W (sh) /W (sh) ) mice with an inversion mutation in the regulatory elements upstream of the c-Kit promoter region, and their wild-type controls (WT) were fed either a normal (0...
October 14, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/29031599/interaction-of-dj-1-with-lyn-is-essential-for-ige-mediated-stimulation-of-human-mast-cells
#11
Do-Kyun Kim, Michael A Beaven, Dean D Metcalfe, Ana Olivera
BACKGROUND: DJ-1 is a redox-sensitive protein with multiple roles in cell homeostasis whose levels are altered in mast cell (MC)-related disorders. However, whether DJ-1 can regulate human MC function is unknown. OBJECTIVE: We sought to investigate the potential role of DJ-1 in the responses of human MCs to antigen stimulation. METHODS: DJ-1 was silenced in human CD34(+)-derived and LAD2 MCs using lentiviral sh-RNA constructs. Release of β-hexosaminidase, PGD2 and GM-CSF and changes in reactive oxygen species (ROS) levels were measured after FcεRI engagement...
October 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29031457/microvalve-controlled-multi-functional-microfluidic-chip-for-divisional-cell-co-culture
#12
Rui Li, Xingjian Zhang, Xuefei Lv, Lina Geng, Yongrui Li, Kuiwei Qin, Yulin Deng
Pneumatic micro-valve controlled microfluidic chip provides precise fluidic control for cell manipulation. In this paper, a multi-functional microfluidic chip was designed for three separate experiments: 1. Different cell lines were dispensed and cultured; 2. Three transfected SH-SY5Y cells were introduced and treated with methyl-phenyl-pyridinium (MPP(+)) as drug delivery mode; 3. Specific protection and interaction were observed among cell co-culture after nerve damage. The outcomes revealed the potential and practicability of our entire multi-functional pneumatic chip system on different cell biology applications...
October 11, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29030221/inhibition-of-bdnf-production-by-mpp-through-up-regulation-of-mir-210-3p-contributes-to-dopaminergic-neuron-damage-in-mptp-model
#13
Shan Zhang, Shu Chen, Anmin Liu, Jungang Wan, Lingwen Tang, Niandong Zheng, Yi Xiong
The neurotrophin brain-derived neurotrophic factor (BDNF) has been involved in supporting of neuron survival. The observation of reduced level of BDNF in the substantia nigra (SN) of Parkinson's disease (PD) patients suggests its important role in neuron protection in PD pathogenesis. However, the mechanism underlying the down-regulation of BDNF in PD was largely unknown. In this study, we found that miR-210-3p is involved in the regulation of BDNF production by 1-methyl-4-phenylpyridinium (MPP(+)). MPP(+) inhibits the BDNF production in SH-SY5Y cells through a transcription independent manner...
October 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29030220/the-correlation-between-dna-methylation-and-transcriptional-expression-of-human-dopamine-transporter-in-cell-lines
#14
Desheng Zhai, Songji Li, Gaopan Dong, Dushuang Zhou, Yuxin Yang, Xin Wang, Ying Zhao, Yunlei Yang, Zhicheng Lin
This study aims to investigate the relationship between DNA methylation and expression of human dopamine transporter (hDAT). We examined methylation status of hDAT in cells with various hDAT expression levels, including two dopaminergic neural cell lines (SK-N-AS and SH-SY-5Y) and one non-dopaminergic cell line (HEK293) by bisulfite sequencing PCR(BSP). The effects of DNA methyltransferase inhibitor 5-aza-dC or/and histone deacetylase inhibitor (HDACi, sodium butyrate, NaB) on the DNA methylation status and mRNA expression levels of hDAT were examined...
October 10, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29030185/inhibitory-effect-of-tartrate-against-phosphate-induced-dj-1-aggregation
#15
Min Soo Kim, Sangmin Lee, Sanguk Yun, Pann-Ghill Suh, Jongmi Park, Minghua Cui, Sun Choi, Sun-Shin Cha, Wook Jin
The DJ-1 protein engages in diverse cellular and pathological processes, including tumorigenesis, apoptosis, sperm fertilization, and the progression of Parkinson's disease (PD). The functional dimeric form of DJ-1 transforms into non-functional filamentous aggregates in an inorganic phosphate (Pi)-dependent manner in vitro. Here, we demonstrated that Pi and reactive oxygen species (ROS) induce DJ-1 aggregation in Neuro2A and SH-SY5Y cells. Remarkably, tartrate treatment significantly reduced Pi- and ROS-induced DJ-1 aggregation and restored Pi- and ROS-provoked cell death using quantitative data as mean±standard deviation, and statistics...
October 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29029436/xist-mir-139-axis-regulates-bleomycin-blm-induced-extracellular-matrix-ecm-and-pulmonary-fibrosis-through-%C3%AE-catenin
#16
Yichun Wang, Ying Liang, Junming Luo, Jing Nie, Huiming Yin, Qiong Chen, Jing Dong, Jixiang Zhu, Jiamei Xia, Wei Shuai
Pulmonary fibrosis (PF), characterized by the destruction of lung tissue architecture and the abnormal deposition of extracellular matrix (ECM) proteins, currently has no satisfactory treatment. In the present study, we investigated the hypothesis that XIST play a promotive role in bleomycin (BLM)-induced ECM and pulmonary fibrosis; XIST exerts its effect through miR-139 regulation. XIST expression was upregulated in lung tissues derived from BLM-induced mouse model of PF, and was positively correlated with β-catenin and ECM protein levels, respectively...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29029433/h2o2-attenuates-igf-1r-tyrosine-phosphorylation-and-its-survival-signaling-properties-in-neuronal-cells-via-nr2b-containing-nmda-receptor
#17
Zhiwen Zeng, Dejun Wang, Uma Gaur, Liao Rifang, Haitao Wang, Wenhua Zheng
Impairment of insulin-like growth factor I (IGF-I) signaling plays an important role in the development of neurodegeneration. In the present study, we investigated the effect of H2O2 on the survival signaling of IGF-1 and its underlying mechanisms in human neuronal cells SH-SY5Y. Our results showed that IGF-1 promoted cell survival and stimulated phosphorylation of IGF-1R as well as its downstream targets like AKT and ERK1/2 in these cells. Meanwhile, these effects of IGF-1 were abolished by H2O2 at 200μM concentration which did not cause any significant toxicity to cells itself in our experiments...
September 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29028351/a-hexamer-of-a-peptide-derived-from-a%C3%AE-16-36
#18
Adam G Kreutzer, Ryan K Spencer, Kate J McKnelly, Stan Yoo, Imane L Hamza, Patrick J Salveson, James S Nowick
The absence of high-resolution structures of amyloid oligomers constitutes a major gap in our understanding of amyloid diseases. Increasing evidence indicates that oligomers of the β-amyloid peptide Aβ are especially important in the progression of Alzheimer's disease. In many Aβ oligomers, the Aβ monomer components are thought to adopt a β-hairpin conformation. This paper describes the design and study of a macrocyclic β-hairpin peptide derived from Aβ16-36. SDS-PAGE and size exclusion chromatography studies show that the Aβ16-36 β-hairpin peptide assembles in solution to form hexamers, trimers, and dimers...
October 13, 2017: Biochemistry
https://www.readbyqxmd.com/read/29027532/-mikhail-matveevich-rudnev-is-one-of-the-founders-of-russian-pathological-anatomy-on-the-occasion-of-the-180th-anniversary-of-his-birth
#19
G A Frank, M Sh Knopov, V K Taranuha
No abstract text is available yet for this article.
2017: Arkhiv Patologii
https://www.readbyqxmd.com/read/29027345/a-strategy-for-specific-fluorescence-imaging-of-monoamine-oxidase-a-in-living-cells
#20
Huimin Ma, Xiaofeng Wu, Wen Shi, Xiaohua Li
Monoamine oxidase (MAO) has two isoforms, MAO-A and MAO-B, which show different functions and thus selective fluorescence imaging of which is important for biological studies. Currently, however, specific detection of MAO-A remains a great challenge. Herein, we report a new strategy for specific imaging of MAO-A via designing fluorescent probes by combining the characteristic structure of the enzymatic inhibitor with propylamine as a recognition moiety. The high specificity of our representative probe is demonstrated by imaging MAO-A in different live cells such as SH-SY5Y (high level of MAO-A) and HepG2 (high level of MAO-B), as further validated by both control probe and western blot analyses...
October 12, 2017: Angewandte Chemie
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