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Biological & Pharmaceutical Bulletin

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https://www.readbyqxmd.com/read/28529241/downregulation-of-transcription-factor-sp1-suppresses-malignant-properties-of-a549-human-lung-cancer-cell-line-with-decreased-%C3%AE-4-galactosylation-of-highly-branched-n-glycans
#1
Kodai Muramoto, Riho Tange, Takayuki Ishii, Kana Miyauchi, Takeshi Sato
Dramatic changes in the glycan structures of cell surface proteins have been observed upon malignant transformation of cells as induced by the altered expression levels of glycosyltransferases. Such changes are closely associated with the malignant properties of cancer cells. Transcription factor Sp1 regulates the gene expression of various molecules including glycosyltransferases. Herein, we investigated whether or not Sp1-downregulation affects to N-glycosylation of glycoproteins and malignant properties of A549 human lung carcinoma cell line...
May 20, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28529240/protective-effects-of-curcumin-on-manganese-induced-bv-2-microglial-cell-death
#2
Euteum Park, Hong Sung Chun
Curcumin, a bioactive component in tumeric, has been shown to exert antioxidant, anti-inflammatory, anticarcinogenic, hepatoprotective, and neuroprotective effects, but the effects of curcumin against manganese (Mn)-mediated neurotoxicity have not been studied. This study examined the protective effects of curcumin on Mn-induced cytotoxicity in BV-2 microglial cells. Curcumin (0.1-10 μM) dose-dependently prevented Mn (250 μM)-induced cell death. Mn-induced mitochondria-related apoptotic characteristics, such as caspase-3 and -9 activation, cytochrome c release, Bax increase, and Bcl-2 decrease, were significantly suppressed by curcumin...
May 20, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28515374/polyphyllin-i-overcomes-emt-associated%C3%A2-resistance%C3%A2-to-erlotinib-in-lung-cancer-cells-via-il-6-stat3-pathway-inhibition
#3
Wei Lou, Yan Chen, Ke-Ying Zhu, Huizi Deng, Tianhao Wu, Jun Wang
Acquired resistance to epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) is the most important limiting factor for treatment efficiency in EGFR-mutant non-small cell lung cancer (NSCLC). Much work has linked the epithelial-mesenchymal transition (EMT) to the emergence of drug resistance, consequently, ongoing research has been focused on exploring the therapeutic options to reverse EMT for delaying or preventing drug resistance. Polyphyllin I (PPI) is a natural compound isolated from Paris polyphylla rhizomes and displayed anti-cancer properties...
May 18, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28502922/design-synthesis-and-structure-activity-relationship-study-of-epoxysuccinyl-peptide-derivatives-as-cathepsin-b-inhibitors
#4
Xiaoye Zhang, Xiaohong Yang, Hongqiang Wang, Song Li, Kun Guo, Dan Jiang, Junhai Xiao, Di Liang
Cathepsin B is a lysosomal cysteine protease involved in many diseases. The present research demonstrates that derivatives of epoxysuccinyl-peptide are effective and selective cathepsin B inhibitors. We synthesized a series of epoxysuccinyl-peptide derivatives based on the well-known cathepsin B inhibitor E64d. Specifically, we substituted the 2-methylpropane group at the R(1) position of E64d with a sulfane, such as ethyl(methyl) sulfane or benzyl(methyl) sulfane. We also designed and synthesized a library of molecules with various substituents at the R(2) position of E64d to replace 2-methylbutane...
May 13, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28502921/umbilical-cord-mscs-reverse-d-galactose-induced-hepatic-mitochondrial-dysfunction-via-activation-of-nrf2-ho-1-pathway
#5
Weihong Yan, Dong Li, Tong Chen, Guiying Tian, Panpan Zhou, Xiuli Ju
Mitochondria are the central hubs for cellular bioenergetics and are crucial to cell survival. It is well accepted that compromised mitochondrial function is linked with hepatocytes injury and contribute to progression of liver diseases. Despite the therapeutic potential of mesenchymal stem cells (MSCs) transplantation on hepatic disorders have been extensively investigated, the effects of MSCs on mitochondrial function in liver injury models remain unknown. Here we investigated the effects of treatment with umbilical cord (UC) MSC in a rat model of D-Gal induced liver injury, characterized by organ damage, oxidative stress and mitochondrial dysfunction...
May 13, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28428486/antioxidative-protection-of-squalene-adjuvant-and-rabies-vaccine-with-adjuvant
#6
Anna Ondrejková, Judit Süli, Jarmila Harvanová, Róbert Ondrejka, Marián Prokeš
The authors verified the possibility of antioxidative protection of squalene adjuvant emulsions by the antioxidants α-tocopherol and β-carotene. They determined the influence of β-carotene on the stability and antigenic effectiveness of adjuvant emulsion in combination with rabies vaccine.The composition of the adjuvant emulsions or vaccines was: 2.5% squalene; 6% detergents; 0.5% antioxidant; 91% water phase. The oxidative injury after UV-irradiation was followed by the detection of the peroxide value of the emulsions...
April 19, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28420819/synonymous-and-biased-codon-usage-by-mers-cov-papain-like-and-3cl-proteases
#7
Mahmoud Kandeel, Abdallah Altaher
Middle East respiratory syndrome coronavirus (MERS CoV) is a recently evolved fatal respiratory disease that poses a concern for a global epidemic. MERS CoV encodes 2 proteases, 3C-like protease (3CLpro) and papain-like protease (PLpro). These proteases share in processing MERS CoV polyproteins at different sites to yield 16 nonstructural proteins. In this work, we provide evidence that MERS CoV 3CLpro and PLpro are subject to different genetic and evolutionary influences that shape the protein sequence, codon usage pattern, and codon usage bias...
April 18, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28381791/anti-oxidative-activity-of-hydrolysate-from-rice-bran-protein-in-hepg2-cells
#8
Chie Moritani, Kayoko Kawakami, Akiko Fujita, Koji Kawakami, Tadashi Hatanaka, Seiji Tsuboi
Glutathione (GSH) is an ubiquitous thiol-containing tripeptide, which plays important roles in cellular protection from oxidative stress. In our search for a dietary source that can increase glutathione (GSH) levels, we discovered that a 24 h treatment of HepG2 cells with rice bran protein hydrolysate (RBPH), prepared by Umamizyme G-catalyzed hydrolysis, increased the GSH content in a dose-dependent manner. RBPH elevated the expression levels ofγ-glutamylcysteine synthetase (γ-GCS), which constitutes the rate-limiting enzyme of GSH synthesis, and of another two enzymes, hemeoxygenase-1 (HO-1) and NAD(P)H quinone oxidoreductase1 (NQO1)...
April 6, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28381813/development-of-polyethylene-glycol-and-hard-fat-based-mucoadhesive-tablets-containing-various-types-of-polyvinyl-alcohols-as-mucoadhesive-polymers-for-buccal-application
#9
Yuri Ikeuchi-Takahashi, Ayaka Kobayashi, Hiraku Onishi
Topical drug application has the advantage of avoiding systemic side effects. We attempted to develop a long-acting matrix-type tablet containing indomethacin (IM) with low physical stimulus and potent mucoadhesive force to treat pain caused by oral aphtha. A mixture of polyethylene glycol (PEG) and hard fat was used as the tablet base. Ethylcellulose was added to the base in an attempt to control drug release. Tablets with PEG as a base were also prepared for comparison. Polyvinyl alcohols (PVAs) with various degrees of saponification were added to increase the mucoadhesive force...
April 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28381812/a-simple-enzymatic-biotransformation-method-using-fresh-green-tea-leaves-efficiently-generates-theaflavin-containing-fermentation-water-that-has-potent-physiological-functions-in-mice-and-humans
#10
Masumi Takemoto, Hiroaki Takemoto, Haruka Kouno, Tomomi Soeda, Takamichi Moriya
The polyphenolic compound theaflavin, the main red pigment in black tea, possesses many beneficial properties, such as fat-reducing and glucose-lowering capabilities. To produce theaflavin-containing fermentation water on a large scale, we have developed a simple, inexpensive, and selective enzymatic biotransformation method to obtain sufficient levels from fresh green tea leaves. Subsequent administration of theaflavin-containing fermentation water to obese mice on a high-fat diet inhibited body weight gain, decreased casual blood glucose and fasting blood glucose levels, and lowered mesenteric and total fat composition...
April 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28344198/radiosensitizing-effect-of-p2x7-receptor-antagonist-on-melanoma-in-vitro-and-in-vivo
#11
Keisuke Tanamachi, Keisuke Nishino, Natsuki Mori, Toshihiro Suzuki, Sei-Ichi Tanuma, Ryo Abe, Mitsutoshi Tsukimoto
Melanoma is highly malignant, and generally exhibits radioresistance, responding poorly to radiation therapy. We previously reported that activation of P2X7, P2Y6, and P2Y12 receptors is involved in the DNA damage response after γ-irradiation of human lung adenocarcinoma A549 cells. However, it is not clear whether these receptors are also involved in the case of melanoma cells, although P2X7 receptor is highly expressed in various cancers, including melanoma. Here, we show that P2X7 receptor antagonist enhances radiation-induced cytotoxicity in B16 melanoma cells in vitro and in vivo...
March 24, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28321036/a-highly-potent-and-selective-histone-deacetylase-6-inhibitor-prevents-dss-induced-colitis-in-mice
#12
Ting Liu, Renping Wang, Haojie Xu, Yunlong Song, Yunpeng Qi
Inflammatory bowel disease (IBD) is a refractory illness with remarkably increasing incidence rate all over the world. However, no desirable treatment scheme is available. Therefore, research and development of new drugs for treating IBD are urgently needed. Histone deacetylase 6 (HDAC6) is considered to be a pro-inflammatory factor, thus the inhibitors specifically-targeting HDAC6 may find their way in IBD treatment. In this study, we evaluated the anti-inflammatory activity of a novel potent and selective HDAC6 inhibitor, LTB2, in dextran sulfate sodium (DSS)-induced colitis mouse model...
March 17, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28260722/high-resolution-magic-angle-spinning-1-h-nmr-spectroscopy-based-metabolic-profiling-of-hippocampal-tissue-in-rats-with-depression-like-symptoms
#13
Hayato Akimoto, Shinji Oshima, Kousuke Ohara, Akio Negishi, Hanako Hiroyama, Tadashi Nemoto, Daisuke Kobayashi
Depressive disorders cause large socioeconomic effects influencing not only the patients themselves but also their family and broader community as well. To better understand the physiologic factors underlying depression, in this study, we performed metabolomics analysis, an omics technique that comprehensively analyzes small molecule metabolites in biological samples. Specifically, we utilized high-resolution magic-angle spinning-(1)H NMR (HRMAS-(1)H NMR) spectroscopy to comprehensively analyze the changes in metabolites in the hippocampal tissue of rats exposed to chronic stress (CS) via multi-step principal component analysis (multi-step PCA)...
March 4, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28260721/the-characteristics-of-hepatic-gs%C3%AE-camp-axis-in-hshf-diet-fed-obese-insulin-resistance-rats-and-genetic-diabetic-mice
#14
Nina Xue, Chen Wei, Lihong Zhang, Hongying Liu, Xiaojuan Wang, Lili Wang
Stimulatory G protein α-subunit (Gsα) mediated cyclic adenosine monophosphate (cAMP) signal is required for elevated hepatic glucose production (HGP) in diabetic patients. However, it remains obscure of the exact characteristics of hepatic Gsα-cAMP signal axis (including Gsα, glucagon receptor, β2-adrenergic receptor, cAMP, phosphoenolpyruvate carboxykinase and glucose-6-phosphatase) in insulin resistance (IR) and type 2 diabetes mellitus (T2DM). In current study, we investigated the changing characteristics of hepatic Gsα-cAMP signal axis and blood glucose in high-sugar-high-fat (HSHF)-diet-induced IR wistar rats and db/db diabetic mice...
March 4, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28190857/protective-effects-of-tyrosol-against-lps-induced-acute-lung-injury-via-inhibiting-nf-%C3%AE%C2%BAb-and-ap-1-activation-and-activating-the-ho-1-nrf2-pathways
#15
Wen-Chen Wang, Yan-Min Xia, Bo Yang, Xiang-Ni Su, Jia-Kuan Chen, Wei Li, Tao Jiang
Tyrosol (Tyr) is a natural antioxidant that displays anti-oxidant and anti-inflammatory properties. The present study aimed to investigate the effect and mechanism of Tyr on lipopolysaccharide (LPS)-induced acute lung injury (ALI). In a mouse model, we found that pretreatment with Tyr significantly improved survival rate, attenuated lung permeability, ameliorated histopathological alterations, reduced expression of the inflammatory mediators and improved expression of the antioxidant enzyme. Further study revealed that Tyr markedly inhibited nuclear factor-κB (NF-κB) and activator protein-1 (AP-1) activation at both in vivo and in vitro levels...
May 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28163294/metabolic-suppression-by-3-iodothyronamine-induced-muscle-cell-atrophy-via-activation-of-foxo-proteasome-signaling-and-downregulation-of-akt1-s6k-signaling
#16
Hyunwoo Ju, Taewan Kim, Chan-Moon Chung, Junsoo Park, Takeshi Nikawa, Kyoungsook Park, Inho Choi
The homeostasis of muscle properties depends on both physical and metabolic stresses. Whereas physical stress entails metabolic response for muscle homeostasis, the latter does not necessarily involve the former and may thus solely affect the homeostasis. We here report that metabolic suppression by the hypometabolic agent 3-iodothyronamine (T1AM) induced muscle cell atrophy without physical stress. We observed that the oxygen consumption rate of C2C12 myotubes decreased 40% upon treatment with 75 µM T1AM for 6 h versus 10% in the vehicle (dimethyl sulfoxide) control...
May 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28123134/effects-of-combined-treatment-with-branched-chain-amino-acids-citric-acid-l-carnitine-coenzyme-q10-zinc-and-various-vitamins-in-tumor-bearing-mice
#17
Hiroko Awa, Akihiko Futamura, Takashi Higashiguchi, Akihiro Ito, Naoharu Mori, Miyo Murai, Hiroshi Ohara, Takeshi Chihara, Takaaki Kaneko
A functional dietary supplement (FDS) containing Coenzyme Q10, branched-chain amino acids and L-carnitine was administered to tumor-bearing mice, investigating its effects on tumor and muscle tissues. Experiment (A): B16 melanoma cells were implanted subcutaneously into the right side of the abdomen of 8- to 9-week-old C57BL/6J mice. The mice were divided into two groups: a FDS group that received oral administration of FDS (n=10), and a control group that received oral administration of glucose (n=10). The moribund condition was used as the endpoint, and median survival time was determined...
March 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28003606/solubility-testing-of-sucrose-esters-of-fatty-acids-in-international-food-additive-specifications
#18
Yukino Nagai, Satoko Kawano, Kenichiro Motoda, Masaaki Tomida, Chiye Tatebe, Kyoko Sato, Hiroshi Akiyama
We investigated the solubility of 10 samples of sucrose esters of fatty acids (SEFA) products that are commercially available worldwide as food additives (emulsifiers). Although one sample dissolved transparently in both water and ethanol, other samples produced white turbidity and/or precipitates and did not meet the solubility criterion established by the Joint Food and Agriculture Organization of the United Nations (FAO)/WHO Expert Committee on Food Additives (JECFA). When the sample solutions were heated, the solubility in both water and ethanol increased...
March 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27990002/cinepazide-maleate-improves-cognitive-function-and-protects-hippocampal-neurons-in-diabetic-rats-with-chronic-cerebral-hypoperfusion
#19
Yumei Li, Ting Zhang, Xiaojie Zhang, Wenying Zou, Xian Gong, Jianliang Fu
To determine the combined effect of type 2 diabetes (T2D) and chronic cerebral hypoperfusion (CCH) on learning and spatial memory, we developed a rat model of CCH by permanent occlusion of bilateral common carotid arteries (2-vessel occlusion (2VO)) in high-fat diet (HFD)-fed rats injected with low-dose streptozotocin (STZ). Furthermore, we examined the effect of cinepazide maleate (CM) on cognitive deficits and brain damage in this rat model. Rats were maintained on HFD for 6 weeks and then injected with 35 mg/kg STZ to induce T2D...
March 1, 2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27980245/synthesis-and-characterization-of-8-nitroguanosine-3-5-cyclic-monophosphorothioate-rp-isomer-as-a-potent-inhibitor-of-protein-kinase-g1%C3%AE
#20
Khandaker Ahtesham Ahmed, Tianli Zhang, Katsuhiko Ono, Hiroyasu Tsutsuki, Tomoaki Ida, Soichiro Akashi, Keishi Miyata, Yuichi Oike, Takaaki Akaike, Tomohiro Sawa
Guanosine 3',5'-cyclic monophosphate (cGMP)-dependent protein kinases (PKG) are kinases regulating diverse physiological functions including vascular smooth muscle relaxation, neuronal synaptic plasticity, and platelet activities. Certain PKG inhibitors, such as Rp-diastereomers of derivatives of guanosine 3',5'-cyclic monophosphorothioate (Rp-cGMPS), have been designed and used to study PKG-regulated cell signaling. 8-Nitroguanosine 3',5'-cyclic monophosphate (8-nitro-cGMP) is an endogenous cGMP derivative formed as a result of excess production of reactive oxygen species and nitric oxide...
March 1, 2017: Biological & Pharmaceutical Bulletin
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