keyword
MENU ▼
Read by QxMD icon Read
search

okadaic acid

keyword
https://www.readbyqxmd.com/read/27901482/hyperglycemia-triggers-hipk2-protein-degradation
#1
Silvia Baldari, Alessia Garufi, Marisa Granato, Laura Cuomo, Giuseppa Pistritto, Mara Cirone, Gabriella D'Orazi
Homeodomain interacting protein kinase-2 (HIPK2) is an evolutionary conserved kinase that modulates several key molecular pathways to restrain tumor growth and induce p53-depending apoptotic cell-death in response to anticancer therapies. HIPK2 silencing in cancer cells leads to chemoresistance and cancer progression, in part due to p53 inhibition. Recently, hyperglycemia has been shown to reduce p53 phosphorylation at serine 46 (Ser46), the target residue of HIPK2, thus impairing p53 apoptotic function. Here we asked whether hyperglycemia could, upstream of p53, target HIPK2...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27895171/impairment-of-ccr6-and-cxcr3-th-cell-migration-in-hiv-1-infection-is-rescued-by-modulating-actin-polymerization
#2
Valentina Cecchinato, Enos Bernasconi, Roberto F Speck, Michele Proietti, Ulrike Sauermann, Gianluca D'Agostino, Gabriela Danelon, Tanja Rezzonico Jost, Fabio Grassi, Lorenzo Raeli, Franziska Schöni-Affolter, Christiane Stahl-Hennig, Mariagrazia Uguccioni
CD4(+) T cell repopulation of the gut is rarely achieved in HIV-1-infected individuals who are receiving clinically effective antiretroviral therapy. Alterations in the integrity of the mucosal barrier have been indicated as a cause for chronic immune activation and disease progression. In this study, we present evidence that persistent immune activation causes impairment of lymphocytes to respond to chemotactic stimuli, thus preventing their trafficking from the blood stream to peripheral organs. CCR6(+) and CXCR3(+) Th cells accumulate in the blood of aviremic HIV-1-infected patients on long-term antiretroviral therapy, and their frequency in the circulation positively correlates to levels of soluble CD14 in plasma, a marker of chronic immune activation...
November 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27885227/the-experience-of-dissolving-polypharmacy-by-reducing-the-prescription-of-anti-ulcer-drugs-in-residents-of-a-special-geriatric-nursing-home
#3
Kosuke Okada, Yumiko Yamaguch, Nanao Kamada, Masahiro Okada, Shigeko Katoh, Hidemi Sasaki
AIM: As part of a broader study on polypharmacy among elderly nursing home residents, we examined the impact of reducing or discontinuing the prescription of proton pump inhibitors and other anti-ulcer drugs. METHODS: We employed a strategy of reducing and discontinuing the prescription of drugs to 160 elderly residents of the Hiroshima Atomic Bomb survivors nursing home, Kandayama Yasuragien. The residents had entered the home between April 2012 and November 2015...
2016: Nihon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics
https://www.readbyqxmd.com/read/27864362/identification-of-lysophosphatidic-acid-receptor-1-in-astroglial-cells-as-a-target-for-glial-cell-line-derived-neurotrophic-factor-expression-induced-by-antidepressants
#4
Naoto Kajitani, Kanako Miyano, Mami Okada-Tsuchioka, Hiromi Abe, Kei Itagaki, Kazue Hisaoka-Nakashima, Norimitsu Morioka, Yasuhito Uezono, Minoru Takebayashi
Preclinical and clinical evidence suggests that glial cell line-derived neurotrophic factor (GDNF) is important in the therapeutic effect of antidepressants. A previous study demonstrated that the tricyclic antidepressant amitriptyline induces Gαi/o activation, which leads to GDNF expression in astrocytes. However, the specific target expressed in astrocytes that mediates antidepressant-evoked Gαi/o activation has yet to be identified. Thus, the current study explored the possibility that antidepressant-induced Gαi/o activation depends on lysophosphatidic acid receptor 1 (LPAR1), a Gαi/o-coupled receptor...
November 18, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27863109/diagnostic-accuracy-of-the-anti-glutamic-acid-decarboxylase-antibody-in-type-1-diabetes-mellitus-comparison-between-radioimmunoassay-and-enzyme-linked-immunosorbent-assay
#5
Takashi Murata, Kokoro Tsuzaki, Shinsuke Nirengi, Tomokazu Watanabe, Yukako Mizutani, Hayami Okada, Masami Tsukamoto, Shinji Odori, Reiko Nakagawachi, Yaeko Kawaguchi, Fumi Yoshioka, Kazunori Yamada, Akira Shimatsu, Kazuhiko Kotani, Noriko Satoh-Asahara, Naoki Sakane
AIM: The distributer of the anti-glutamic acid decarboxylase (GAD) antibody assay kit using radioimmunoassay (RIA) recently announced its discontinuation and proposed an alternative kit using enzyme-linked immunosorbent assay (ELISA). The aim of the present study was to investigate the diagnostic values of the anti-GAD antibody by RIA and ELISA among type 1 diabetes mellitus patients and control subjects. METHODS: Seventy-nine type 1 diabetes mellitus patients and 79 age-matched controls were enrolled and assessed using RIA and ELISA...
November 10, 2016: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/27856190/screening-of-mcad-deficiency-in-japan-16years-experience-of-enzymatic-and-genetic-evaluation
#6
Go Tajima, Keiichi Hara, Miyuki Tsumura, Reiko Kagawa, Satoshi Okada, Nobuo Sakura, Ikue Hata, Yosuke Shigematsu, Masao Kobayashi
BACKGROUND: Medium-chain acyl-CoA dehydrogenase (MCAD) deficiency is a representative disorder of fatty acid oxidation and is one of the most prevalent inborn errors of metabolism among Caucasian populations. In Japan, however, it was as late as 2000 when the first patient was found, and enzymatic and genetic evaluation of MCAD deficiency began. METHODS: We measured octanoyl-CoA dehydrogenase activity in lymphocytes of symptomatic children and newborn screening (NBS)-positive subjects who showed elevated levels of C8-acylcarnitine in blood...
October 21, 2016: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/27851811/atorvastatin-alleviates-experimental-diabetic-cardiomyopathy-by-regulating-the-gsk-3%C3%AE-pp2ac-nf-%C3%AE%C2%BAb-signaling-axis
#7
Xiao-Min Ren, Guang-Feng Zuo, Wen Wu, Jie Luo, Peng Ye, Shao-Liang Chen, Zuo-Ying Hu
Recent studies reported that atorvastatin (ATOR) alleviated progression of experimental diabetic cardiomyopathy (DCM), possibly by protecting against apoptosis. However, the underlying mechanisms of this protective effect remain unclear. Therefore, our study investigated the role of the glycogen synthase kinase (GSK)-3β-protein phosphatase 2A(PP2A)-NF-κB signaling pathway in the anti-apoptotic and cardioprotective effects of ATOR on cardiomyocytes cultured in high glucose (HG) and in DCM. Our results showed that, in HG-cultured cardiomyocytes, phosphorylation of GSK-3β was decreased, while that of the PP2A catalytic subunit C (PP2Ac) and IKK/IкBα was increased, followed by NF-кB nuclear translocation and apoptosis...
2016: PloS One
https://www.readbyqxmd.com/read/27834832/enantioseparation-using-cellulose-tris-3-5-dimethylphenylcarbamate-as-chiral-stationary-phase-for-hplc-influence-of-molecular-weight-of-cellulose
#8
Yuji Okada, Chiyo Yamamoto, Masami Kamigaito, Yuan Gao, Jun Shen, Yoshio Okamoto
The cellulose oligomers with different degrees of polymerization (DP), 7, 11, 18, 24, 26, 40 and 52, were prepared by hydrolysis of microcrystalline cellulose with phosphoric acid. These oligomers including the starting microcrystalline cellulose (DP 124) were converted to tris(3,5-dimethylphenylcarbamate) (CDMPC) derivatives by the reaction with an excess of 3,5-dimethylphenyl isocyanate to be used as the chiral stationary phase (CSP) in high-performance liquid chromatography (HPLC). The structures of the CDMPC derivatives were investigated by infrared spectroscopy (IR), ¹H-NMR, circular dichroism (CD) and size exclusion chromatography (SEC), and the DPs of the derivatives estimated by SEC agreed with those estimated by ¹H-NMR...
November 8, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27833131/adenovirus-vector-based-incorporation-of-a-photo-cross-linkable-amino-acid-into-proteins-in-human-primary-cells-and-cancerous-cell-lines
#9
Ayami Kita, Nobumasa Hino, Sakiko Higashi, Kohji Hirota, Ryohei Narumi, Jun Adachi, Kazuaki Takafuji, Kenji Ishimoto, Yoshiaki Okada, Kensaku Sakamoto, Takeshi Tomonaga, Seiji Takashima, Hiroyuki Mizuguchi, Takefumi Doi
The site-specific incorporation of cross-linkable designer amino acids into proteins is useful for covalently bonding protein complexes upon exposure to light. This technology can be used to study networks of protein-protein interactions in living cells; however, to date it has only been applicable for use with a narrow range of cell types, due to the limited availability of plasmid-based transfection protocols. In the present study, we achieved adenovirus-based expression of a variant of an archaeal pyrrolysyl-tRNA synthetase and UAG-recognising tRNA pair, which was used to incorporate unnatural amino acids into proteins at sites defined by in-frame UAG codons within genes...
November 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27832320/activation-of-nuclear-receptor-car-by-an-environmental-pollutant-perfluorooctanoic-acid
#10
Taiki Abe, Mirei Takahashi, Makoto Kano, Yuto Amaike, Chizuru Ishii, Kazuhiro Maeda, Yuki Kudoh, Toru Morishita, Takuomi Hosaka, Takamitsu Sasaki, Susumu Kodama, Atsushi Matsuzawa, Hiroyuki Kojima, Kouichi Yoshinari
Perfluorocarboxylic acids (PFCAs) including perfluorooctanoic acid (PFOA) are environmental pollutants showing high accumulation, thermochemical stability and hepatocarcinogenicity. Peroxisome proliferator-activated receptor α is suggested to mediate their toxicities, but the precise mechanism remains unclear. Previous reports also imply a possible role of constitutive androstane receptor (CAR), a key transcription factor for the xenobiotic-induced expression of various genes involved in drug metabolism and disposition as well as hepatocarcinogenesis...
November 10, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27830316/a-mussel-tissue-certified-reference-material-for-multiple-phycotoxins-part-4-certification
#11
Pearse McCarron, Elliott Wright, Håkan Emteborg, Michael A Quilliam
A freeze-dried mussel tissue (Mytilus edulis) reference material (CRM-FDMT1) was produced containing multiple groups of shellfish toxins. Homogeneity and stability testing showed the material to be fit for purpose. The next phase of work was to assign certified values and uncertainties to 10 analytes from six different toxin groups. Efforts involved optimizing extraction procedures for the various toxin groups and performing measurements using liquid chromatography-based analytical methods. A key aspect of the work was compensating for matrix effects associated with liquid chromatography-mass spectrometry through standard addition, dilution, or matrix-matched calibration...
November 9, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27827901/structure-activity-relationship-studies-using-natural-and-synthetic-okadaic-acid-dinophysistoxin-toxins
#12
Michael J Twiner, Gregory J Doucette, Yucheng Pang, Chao Fang, Craig J Forsyth, Christopher O Miles
Okadaic acid (OA) and the closely related dinophysistoxins (DTXs) are algal toxins that accumulate in shellfish and are known serine/threonine protein phosphatase (ser/thr PP) inhibitors. Phosphatases are important modulators of enzyme activity and cell signaling pathways. However, the interactions between the OA/DTX toxins and phosphatases are not fully understood. This study sought to identify phosphatase targets and characterize their structure-activity relationships (SAR) with these algal toxins using a combination of phosphatase activity and cytotoxicity assays...
November 4, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27824904/circulating-omega-6-but-not-omega-3-polyunsaturated-fatty-acids-are-associated-with-clinical-outcomes-in-patients-with-acute-decompensated-heart-failure
#13
Toshiyuki Nagai, Yasuyuki Honda, Yasuo Sugano, Kunihiro Nishimura, Michikazu Nakai, Satoshi Honda, Naotsugu Iwakami, Atsushi Okada, Yasuhide Asaumi, Takeshi Aiba, Teruo Noguchi, Kengo Kusano, Hisao Ogawa, Satoshi Yasuda, Toshihisa Anzai
BACKGROUND: Circulating polyunsaturated fatty acid (PUFA) levels are associated with clinical outcomes in cardiovascular diseases including coronary artery disease and chronic heart failure (HF). However, their clinical implications in acute decompensated HF (ADHF) remain unclear. The aim of this study was to investigate the clinical roles of circulating PUFAs in patients with ADHF. METHODS: Circulating levels of PUFAs, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), arachidonic acid (AA) and dihomo-gamma linoleic acid (DGLA), were measured on admission in 685 consecutive ADHF patients...
2016: PloS One
https://www.readbyqxmd.com/read/27806566/characterization-of-the-interunit-bonds-of-lignin-oligomers-released-by-acid-catalyzed-selective-solvolysis-of-cryptomeria-japonica-and-eucalyptus-globulus-woods-via-thioacidolysis-and-2d-nmr
#14
Kaori Saito, Atsushi Kaiho, Ryo Sakai, Hiroshi Nishimura, Hitomi Okada, Takashi Watanabe
Acid-catalyzed degradation of lignin in toluene containing methanol selectively yields C6-C2 lignin monomers and releases lignin oligomers, a potential raw feedstock for epoxy resins. We herein characterized the structures of the lignin oligomers by focusing on the changes in the interunit linkage types during solvolysis. The oligomeric lignin products were analyzed via thioacidolysis and 2D HSQC NMR. The results showed that lignin oligomers ranging from monomers to tetramers are released through considerable cleavage of the β-O-4 linkages...
November 3, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27802163/acid-sphingomyelinase-is-required-for-cell-surface-presentation-of-met-receptor-tyrosine-kinase-in-cancer-cells
#15
Linyu Zhu, Xiahui Xiong, Yongsoon Kim, Naomi Okada, Fei Lu, Hui Zhang, Hong Sun
Receptor tyrosine kinases (RTKs) are embedded in the lipid bilayer of the plasma membrane, but the specific roles of various lipids in cell signaling remain largely uncharacterized. We have previously found that acid sphingomyelinase (ASM; also known as SMPD1) regulates the conserved DAF-2 (the ortholog IGF-1R in mammals) RTK signaling pathway in Caenorhabditis elegans How ASM and its catalytic products, ceramides, control RTK signaling pathways remain unclear. Here, we report that ASM regulates the homeostasis of Met, an RTK that is frequently overexpressed in various cancers...
November 15, 2016: Journal of Cell Science
https://www.readbyqxmd.com/read/27795675/genomic-dissection-of-a-fuji-apple-cultivar-re-sequencing-snp-marker-development-definition-of-haplotypes-and-qtl-detection
#16
Miyuki Kunihisa, Shigeki Moriya, Kazuyuki Abe, Kazuma Okada, Takashi Haji, Takeshi Hayashi, Yoshihiro Kawahara, Ryutaro Itoh, Takeshi Itoh, Yuichi Katayose, Hiroyuki Kanamori, Toshimi Matsumoto, Satomi Mori, Harumi Sasaki, Takashi Matsumoto, Chikako Nishitani, Shingo Terakami, Toshiya Yamamoto
'Fuji' is one of the most popular and highly-produced apple cultivars worldwide, and has been frequently used in breeding programs. The development of genotypic markers for the preferable phenotypes of 'Fuji' is required. Here, we aimed to define the haplotypes of 'Fuji' and find associations between haplotypes and phenotypes of five traits (harvest day, fruit weight, acidity, degree of watercore, and flesh mealiness) by using 115 accessions related to 'Fuji'. Through the re-sequencing of 'Fuji' genome, total of 2,820,759 variants, including single nucleotide polymorphisms (SNPs) and insertions or deletions (indels) were detected between 'Fuji' and 'Golden Delicious' reference genome...
September 2016: Breeding Science
https://www.readbyqxmd.com/read/27776236/screening-of-lipophilic-marine-toxins-in-marine-aquaculture-environment-using-liquid-chromatography-mass-spectrometry
#17
Junhui Chen, Xin Li, Shuai Wang, Farong Chen, Wei Cao, Chengjun Sun, Li Zheng, Xiaoru Wang
This study aimed to develop an exact mass suspect screening approach to perform finding of multiple lipophilic marine toxins (LMTs) in seawater, suspended particulate matter (SPM), and marine sediment from marine aquaculture area using liquid chromatography-time of flight mass spectrometry (LC-TOF/MS). The method was validated and proven to be reliable for the screening of various LMTs. Then, the method was applied to screen LMTs in marine environmental samples collected from mariculture area of Jiaozhou Bay, China...
October 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/27771842/central-vascular-structures-as-a-characteristic-finding-of-regenerative-nodules-using-hepatobiliary-phase-gadolinium-ethoxybenzyl-diethylenetriaminepentaacetic-acid-enhanced-mri-and-arterial-dominant-phase-contrast-enhanced-us
#18
Kazuya Sugimori, Kazushi Numata, Masahiro Okada, Hiromi Nihonmatsu, Shigeo Takebayashi, Shin Maeda, Masayuki Nakano, Katsuaki Tanaka
OBJECTIVE: We investigated the characteristic findings of regenerative nodules (RNs) for differentiating early hepatocellular carcinoma (HCC) from high-grade dysplastic nodules (HGDNs) using magnetic resonance imaging (MRI) with gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd-EOB-DTPA; EOB-MRI) and contrast-enhanced ultrasonography (CEUS) in patients with chronic liver disease. SUBJECTS AND METHODS: Pathologically confirmed lesions (100 early HCCs, 7 HGDNs, and 20 RNs with a maximum diameter of more than 1 cm and mean maximal diameters of 15...
October 22, 2016: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/27769892/bimodal-modulation-of-store-operated-ca-2-channels-by-clozapine-in-astrocytes
#19
Yuzuki Kanda, Miho Okada, Rina Ikarashi, Eri Morioka, Takashi Kondo, Masayuki Ikeda
Clozapine (Clz) and olanzapine (Olz) are second generation (atypical) antipsychotics, used widely for treating schizophrenia and bipolar disorder. These drugs share multiple sites of actions, however their mechanisms remain incompletely understood. Here, we analyzed the effects of these drugs on primary cultures of rat cortical astrocytes and C6 glioma cells using fura-2-based Ca(2+) imaging. C6 cells, but not cortical astrocytes, express the serotonin 2A receptor subtype, which couples to phospholipase C. Clz (1μM) significantly blocked serotonin-induced Ca(2+) transients in C6 cells, consistent with known antagonistic actions of Clz...
December 2, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27764579/specific-and-essential-but-not-sufficient-roles-of-lrrc8a-in-the-activity-of-volume-sensitive-outwardly-rectifying-anion-channel-vsor
#20
Toshiaki Okada, Md Rafiqul Islam, Nargiza A Tsiferova, Yasunobu Okada, Ravshan Z Sabirov
The broadly expressed volume-sensitive outwardly rectifying anion channel (VSOR, also called VRAC) plays essential roles in cell survival and death. Recent findings have suggested that LRRC8A is a core component of VSOR in human cells. In the present study, VSOR currents were found to be largely reduced by siRNA against LRRC8A in mouse C127 cells as well. In contrast, LRRC8A knockdown never affected activities of four other types of anion channel activated by acid, Ca(2+), patch excision or cAMP. While cisplatin-resistant KCP-4 cells poorly expressed endogenous VSOR activity, molecular expression levels of LRRC8A, LRRC8D and LRRC8E were indistinguishable between VSOR-deficient KCP-4 cells and the parental VSOR-rich KB cells...
October 20, 2016: Channels
keyword
keyword
99682
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"