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Biomolecules & Therapeutics

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https://www.readbyqxmd.com/read/29715717/antiviral-and-anti-inflammatory-activities-of-pochonin-d-a-heat-shock-protein-90-inhibitor-against-rhinovirus-infection
#1
Jae-Hyoung Song, Aeri Shim, Yeon-Jeong Kim, Jae-Hee Ahn, Bo-Eun Kwon, Thuy Trang Pham, Jongkook Lee, Sun-Young Chang, Hyun-Jeong Ko
Human rhinoviruses (HRV) are one of the major causes of common cold in humans and are also associated with acute asthma and bronchial illness. Heat-shock protein 90 (Hsp90), a molecular chaperone, is an important host factor for the replication of single-strand RNA viruses. In the current study, we examined the effect of the Hsp90 inhibitor pochonin D, in vitro and in vivo , using a murine model of human rhinovirus type 1B (HRV1B) infection. Our data suggested that Hsp90 inhibition significantly reduced the inflammatory cytokine production and lung damage caused by HRV1B infection...
May 2, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29665659/suppressive-effect-of-4-hydroxy-2-4-hydroxyphenethyl-isoindoline-1-3-dione-on-ovalbumin-induced-allergic-asthma
#2
Jin Huang, Mingzhi Su, Bo-Kyung Lee, Mee-Jeong Kim, Jee H Jung, Dong-Soon Im
4-Hydroxy-2-(4-hydroxyphenethyl)isoindoline-1,3-dione (PD1) is a synthetic phthalimide derivative of a marine compound. PD1 has peroxisome proliferator-activated receptor (PPAR) γ agonistic and anti-inflammatory effects. This study aimed to investigate the effect of PD1 on allergic asthma using rat basophilic leukemia (RBL)-2H3 mast cells and an ovalbumin (OVA)-induced asthma mouse model. In vitro , PD1 suppressed β-hexosaminidase activity in RBL-2H3 cells. In the OVA-induced allergic asthma mouse model, increased inflammatory cells and elevated Th2 and Th1 cytokine levels were observed in bronchoalveolar lavage fluid (BALF) and lung tissue...
April 18, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29635911/neural-stem-cell-differentiation-using-microfluidic-device-generated-growth-factor-gradient
#3
Ji Hyeon Kim, Jiyeon Sim, Hyun-Jung Kim
Neural stem cells (NSCs) have the ability to self-renew and differentiate into multiple nervous system cell types. During embryonic development, the concentrations of soluble biological molecules have a critical role in controlling cell proliferation, migration, differentiation and apoptosis. In an effort to find optimal culture conditions for the generation of desired cell types in vitro , we used a microfluidic chip-generated growth factor gradient system. In the current study, NSCs in the microfluidic device remained healthy during the entire period of cell culture, and proliferated and differentiated in response to the concentration gradient of growth factors (epithermal growth factor and basic fibroblast growth factor)...
April 11, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29631391/effects-and-mechanisms-of-taurine-as-a-therapeutic-agent
#4
REVIEW
Stephen Schaffer, Ha Won Kim
Taurine is an abundant, β-amino acid with diverse cytoprotective activity. In some species, taurine is an essential nutrient but in man it is considered a semi-essential nutrient, although cells lacking taurine show major pathology. These findings have spurred interest in the potential use of taurine as a therapeutic agent. The discovery that taurine is an effective therapy against congestive heart failure led to the study of taurine as a therapeutic agent against other disease conditions. Today, taurine has been approved for the treatment of congestive heart failure in Japan and shows promise in the treatment of several other diseases...
April 10, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29605989/ms-5-a-naphthalene-derivative-induces-the-apoptosis-of-an-ovarian-cancer-cell-caov-3-by-interfering-with-the-reactive-oxygen-species-generation
#5
Eunsook Ma, Seon-Ju Jeong, Joon-Seok Choi, Thi Ha Nguyen, Chul-Ho Jeong, Sang Hoon Joo
Reactive oxygen species (ROS) are widely generated in biological processes such as normal metabolism and response to xenobiotic exposure. While ROS can be beneficial or harmful to cells and tissues, generation of ROS by diverse anti-cancer drugs or phytochemicals plays an important role in the induction of apoptosis. We recently identified a derivative of naphthalene, MS-5, that induces apoptosis of an ovarian cell, CAOV-3. Interestingly, MS-5 induced apoptosis by down-regulating the ROS. Cell viability was evaluated by water-soluble tetrazolium salt (WST-1) assay...
April 2, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29587339/gomisin-g-inhibits-the-growth-of-triple-negative-breast-cancer-cells-by-suppressing-akt-phosphorylation-and-decreasing-cyclin-d1
#6
Sony Maharjan, Byoung Kwon Park, Su In Lee, Yoonho Lim, Keunwook Lee, Hyung-Joo Kwon
A type of breast cancer with a defect in three molecular markers such as the estrogen receptor, progesterone receptor, and human epidermal growth factor receptor is called triple-negative breast cancer (TNBC). Many patients with TNBC have a lower survival rate than patients with other types due to a poor prognosis. In this study, we confirmed the anti-cancer effect of a natural compound, Gomisin G, in TNBC cancer cells. Treatment with Gomisin G suppressed the viability of two TNBC cell lines, MDA-MB-231 and MDA-MB-468 but not non-TNBC cell lines such as MCF-7, T47D, and ZR75-1...
March 28, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29534560/longevity-and-stress-resistant-property-of-6-gingerol-from-zingiber-officinale-roscoe-in-caenorhabditis-elegans
#7
Eun Byeol Lee, Jun Hyeong Kim, Chang Wan An, Yeong Jee Kim, Yun Jeong Noh, Su Jin Kim, Ju-Eun Kim, Abinash Chandra Shrestha, Ha-Neul Ham, Jae-Yoon Leem, Hyung-Kwon Jo, Dae-Sung Kim, Kwang Hyun Moon, Jeong Ho Lee, Kyung Ok Jeong, Dae Keun Kim
In order to discover lifespan-extending compounds made from natural resources, activity-guided fractionation of Zingiber officinale Roscoe (Zingiberaceae) ethanol extract was performed using the Caenorhabditis elegans ( C. elegans ) model system. The compound 6-gingerol was isolated from the most active ethyl acetate soluble fraction, and showed potent longevity-promoting activity. It also elevated the survival rate of worms against stressful environment including thermal, osmotic, and oxidative conditions...
March 14, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29463072/the-effects-of-donepezil-an-acetylcholinesterase-inhibitor-on-impaired-learning-and-memory-in-rodents
#8
Chang Yell Shin, Hae-Sun Kim, Kwang-Ho Cha, Dong Han Won, Ji-Yun Lee, Sun Woo Jang, Uy Dong Sohn
A previous study in humans demonstrated the sustained inhibitory effects of donepezil on acetylcholinesterase (AChE) activity; however, the effective concentration of donepezil in humans and animals is unclear. This study aimed to characterize the effective concentration of donepezil on AChE inhibition and impaired learning and memory in rodents. A pharmacokinetic study of donepezil showed a mean peak plasma concentration of donepezil after oral treatment (3 and 10 mg/kg) of approximately 1.2 ± 0.4 h and 1...
May 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29401570/construction-of-a-transcriptome-driven-network-at-the-early-stage-of-infection-with-influenza-a-h1n1-in-human-lung-alveolar-epithelial-cells
#9
Myungguen Chung, Soo Young Cho, Young Seek Lee
We aimed to understand the molecular changes in host cells that accompany infection by the seasonal influenza A H1N1 virus because the initial response rapidly changes owing to the fact that the virus has a robust initial propagation phase. Human epithelial alveolar A549 cells were infected and total RNA was extracted at 30 min, 1 h, 2 h, 4 h, 8 h, 24 h, and 48 h post infection (h.p.i.). The differentially expressed host genes were clustered into two distinct sets of genes as the infection progressed over time...
May 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29495245/yh18968-a-novel-1-2-4-triazolone-g-protein-coupled-receptor-119-agonist-for-the-treatment-of-type-2-diabetes-mellitus
#10
Taedong Han, Byoung Moon Lee, Yoo Hoi Park, Dong Hoon Lee, Hyun Ho Choi, Taehoon Lee, Hakwon Kim
G protein-coupled receptor 119 (GPR119) is expressed in the pancreas and gastrointestinal tract, and its activation promotes insulin secretion in the beta cells of the pancreatic islets as well as the secretion of glucagon-like peptide-1 (GLP-1) in intestinal L cells, consequently improving glucose-stimulated insulin secretion. Due to this dual mechanism of action, the development of small-molecule GPR119 agonists has received significant interest for the treatment of type 2 diabetes. We newly synthesized 1,2,4-triazolone derivatives of GPR119 agonists, which demonstrated excellent outcomes in a cyclic adenosine monophosphate (cAMP) assay...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29462849/synthetic-3-4-dihydroxyflavone-exerts-anti-neuroinflammatory-effects-in-bv2-microglia-and-a-mouse-model
#11
Namkwon Kim, Hyung-Seok Yoo, Yeon-Joo Ju, Myung Sook Oh, Kyung-Tae Lee, Kyung-Soo Inn, Nam-Jung Kim, Jong Kil Lee
Neuroinflammation is an immune response within the central nervous system against various proinflammatory stimuli. Abnormal activation of this response contributes to neurodegenerative diseases such as Parkinson disease, Alzheimer's disease, and Huntington disease. Therefore, pharmacologic modulation of abnormal neuroinflammation is thought to be a promising approach to amelioration of neurodegenerative diseases. In this study, we evaluated the synthetic flavone derivative 3',4'-dihydroxyflavone, investigating its anti-neuroinflammatory activity in BV2 microglial cells and in a mouse model...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29462848/anti-diabetic-effect-of-cotreatment-with-quercetin-and-resveratrol-in-streptozotocin-induced-diabetic-rats
#12
Dong Kwon Yang, Hyung-Sub Kang
Quercetin and resveratrol are known to have beneficial effects on the diabetes and diabetic complication, however, the effects of combined treatment of these compounds on diabetes are not fully revealed. Therefore, the present study was designed to investigate the combined antidiabetic action of quercetin (QE) and resveratrol (RS) in streptozotocin (STZ)-induced diabetic rats. To test the effects of co-treated with these compounds on diabetes, serum glucose, insulin, lipid profiles, oxidative stress biomarkers, and ions were determined...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29429149/carbon-monoxide-ameliorates-6-hydroxydopamine-induced-cell-death-in-c6-glioma-cells
#13
Hyewon Moon, Jung-Hee Jang, Tae Chang Jang, Gyu Hwan Park
Carbon monoxide (CO) is well-known as toxic gas and intrinsic signaling molecule such as neurotransmitter and blood vessel relaxant. Recently, it has been reported that low concentration of CO exerts therapeutic actions under various pathological conditions including liver failure, heart failure, gastric cancer, and cardiac arrest. However, little has been known about the effect of CO in neurodegenerative diseases like Parkinson's disease (PD). To test whether CO could exert a beneficial action during oxidative cell death in PD, we examined the effects of CO on 6-hydroxydopamine (6-OHDA)-induced cell death in C6 glioma cells...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29310428/modulation-of-electroosmotic-flow-through-skin-effect-of-poly-amidoamine-dendrimers
#14
Hye Ji Kim, Seaung Youl Oh
The objective of this work is to evaluate the effect of polyamidoamine (PAMAM) dendrimers on electroosmotic flow (EOF) through skin. The effect of size and concentration of dendrimer was studied, using generation 1, 4 and 7 dendrimer (G1, G4 and G7, respectively). As a marker molecule for the direction and magnitude of EOF, a neutral molecule, acetoaminophen (AAP) was used. The visualization of dendrimer permeation into the current conducting pore (CCP) of skin was made using G4-fluorescein isothiocyanate (FITC) conjugate and confocal microscopy...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29223144/role-of-carbon-monoxide-in-neurovascular-repair-processing
#15
REVIEW
Yoon Kyung Choi
Carbon monoxide (CO) is a gaseous molecule produced from heme by heme oxygenase (HO). Endogenous CO production occurring at low concentrations is thought to have several useful biological roles. In mammals, especially humans, a proper neurovascular unit comprising endothelial cells, pericytes, astrocytes, microglia, and neurons is essential for the homeostasis and survival of the central nervous system (CNS). In addition, the regeneration of neurovascular systems from neural stem cells and endothelial precursor cells after CNS diseases is responsible for functional repair...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29129047/hepaprotective-effect-of-standardized-ecklonia-stolonifera-formulation-on-ccl-4-induced-liver-injury-in-sprague-dawley-rats
#16
Jae-Hyuk Byun, Jun Kim, Se-Young Choung
The liver is an essential organ for the detoxification of exogenous xenobiotics, drugs and toxic substances. The incidence rate of non-alcoholic liver injury increases due to dietary habit change and drug use increase. Our previous study demonstrated that Ecklonia stolonifera (ES) formulation has hepatoprotective effect against alcohol-induced liver injury in rat and tacrine-induced hepatotoxicity in HepG2 cells. This present study was designated to elucidate hepatoprotective effects of ES formulation against carbon tetrachloride (CCl4 )-induced liver injury in Sprague Dawley rat...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28934823/comprehensive-analysis-of-non-synonymous-natural-variants-of-g-protein-coupled-receptors
#17
Hee Ryung Kim, Nguyen Minh Duc, Ka Young Chung
G protein-coupled receptors (GPCRs) are the largest superfamily of transmembrane receptors and have vital signaling functions in various organs. Because of their critical roles in physiology and pathology, GPCRs are the most commonly used therapeutic target. It has been suggested that GPCRs undergo massive genetic variations such as genetic polymorphisms and DNA insertions or deletions. Among these genetic variations, non-synonymous natural variations change the amino acid sequence and could thus alter GPCR functions such as expression, localization, signaling, and ligand binding, which may be involved in disease development and altered responses to GPCR-targeting drugs...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28605831/age-related-changes-in-sulfur-amino-acid-metabolism-in-male-c57bl-6-mice
#18
Jang Su Jeon, Jeong-Ja Oh, Hui Chan Kwak, Hwi-Yeol Yun, Hyoung Chin Kim, Young-Mi Kim, Soo Jin Oh, Sang Kyum Kim
Alterations in sulfur amino acid metabolism are associated with an increased risk of a number of common late-life diseases, which raises the possibility that metabolism of sulfur amino acids may change with age. The present study was conducted to understand the age-related changes in hepatic metabolism of sulfur amino acids in 2-, 6-, 18- and 30-month-old male C57BL/6 mice. For this purpose, metabolite profiling of sulfur amino acids from methionine to taurine or glutathione (GSH) was performed. The levels of sulfur amino acids and their metabolites were not significantly different among 2-, 6- and 18-month-old mice, except for plasma GSH and hepatic homocysteine...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28554200/the-memory-enhancing-effects-of-liquiritigenin-by-activation-of-nmda-receptors-and-the-creb-signaling-pathway-in-mice
#19
Yong-Hyun Ko, Seung-Hwan Kwon, Ji-Young Hwang, Kyung-In Kim, Jee-Yeon Seo, Thi-Lien Nguyen, Seok-Yong Lee, Hyoung-Chun Kim, Choon-Gon Jang
Liquiritigenin (LQ) is a flavonoid that can be isolated from Glycyrrhiza radix. It is frequently used as a tranditional oriental medicine herbal treatment for swelling and injury and for detoxification. However, the effects of LQ on cognitive function have not been fully explored. In this study, we evaluated the memory-enhancing effects of LQ and the underlying mechanisms with a focus on the N-methyl-D-aspartic acid receptor (NMDAR) in mice. Learning and memory ability were evaluated with the Y-maze and passive avoidance tests following administration of LQ...
March 1, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28554199/recombinant-human-thioredoxin-1-protects-macrophages-from-oxidized-low-density-lipoprotein-induced-foam-cell-formation-and-cell-apoptosis
#20
Hui Zhang, Qi Liu, Jia-Le Lin, Yu Wang, Ruo-Xi Zhang, Jing-Bo Hou, Bo Yu
Oxidized low-density lipoprotein (ox-LDL)-induced macrophage foam cell formation and apoptosis play critical roles in the pathogenesis of atherosclerosis. Thioredoxin-1 (Trx) is an antioxidant that potently protects various cells from oxidative stress-induced cell death. However, the protective effect of Trx on ox-LDL-induced macrophage foam cell formation and apoptosis has not been studied. This study aims to investigate the effect of recombinant human Trx (rhTrx) on ox-LDL-stimulated RAW264.7 macrophages and elucidate the possible mechanisms...
March 1, 2018: Biomolecules & Therapeutics
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