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https://www.readbyqxmd.com/read/28215032/nlrp3-inflammasome-activation-regulated-by-nf-%C3%AE%C2%BAb-and-dapk-contributed-to-paraquat-induced-acute-kidney-injury
#1
Zhenning Liu, Xiaokai Wang, Yu Wang, Min Zhao
Paraquat can result in dysfunction of multiple organs after ingestion in human. However, the mechanisms of nucleotide-binding domain and leucine-rich repeat containing protein 3 (NLRP3) inflammasome activation in acute kidney injury have not been clearly demonstrated. The aim of this study was to determine the effect of NLRP3 inflammasome activation and its regulation by nuclear factor-kappa B (NF-κB) and death-associated protein kinase (DAPK). Male Wistar rats were treated with intraperitoneal injection of paraquat at 20 mg/kg, and NF-κB inhibitor BAY 11-7082 was pretreated at 10 mg/kg 1 h before paraquat exposure...
February 18, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28214999/e6-associated-protein-dependent-estrogen-receptor-regulation-of-protein-kinase-a-regulatory-subunit-r2a-expression-in-neuroblastoma
#2
Jean-Pierre Obeid, Youssef H Zeidan, Nawal Zafar, Jimmy El Hokayem
E6ap is a known transcriptional coregulator for estrogen receptor alpha (Er, Erα) in the presence of estrogen. Protein kinase A (PKA) contains two regulatory subunits derived from four genes. Recent evidence demonstrates that PKA regulates E6ap activity. Data generated in our lab indicated estrogen dependent regulation of Pkar2a levels. Our project sets to investigate a possible feedback mechanism constituting of Erα and E6ap transcriptional regulation of Pkar2a expression. Western blot evaluated protein regulation correlations with E2 in mouse neuroblastoma lines...
February 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28214973/a-multifunctional-alanine-rich-anti-inflammatory-peptide-bcp61-showed-potent-inhibitory-effects-by-inhibiting-both-nf-%C3%AE%C2%BAb-and-mapk-expression
#3
Yun Hee Choi, Yoon Seok Choi, Young Kyun Kim, Md Saifur Rahman, G C Pradeep, Jin Cheol Yoo, Joo-Won Suh
The purified BCP61 was reported to be a unique low-molecular-weight (MW) anti-microbial peptide because of its non-identical alanine-rich N-terminal sequence. In this study, we investigated the anti-inflammatory effects of BCP61 on induction of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), pro-inflammatory cytokines, nuclear factor-kappa B (NF-κB), and mitogen-activated protein kinases (MAPKs) in lipopolysaccharide (LPS)-stimulated Raw 264.7 cells. The treatment with BCP61, with varying concentrations of 10, 50, and 100 μg/mL, inhibited levels of expression of LPS-induced NF-κB and MAPKs (extracellular signal-related kinases (ERKs), c-Jun NH2-terminal kinase (JNK), and mitogen-activated protein (p38)) as well as production of pro-inflammatory mediators, such as nitric oxide (NO), prostaglandin E2 (PGE2), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6)...
February 18, 2017: Inflammation
https://www.readbyqxmd.com/read/28214885/signaling-pathway-for-endothelin-1-and-phenylephrine-induced-camp-response-element-binding-protein-activation-in-rat-ventricular-myocytes-role-of-inositol-1-4-5-trisphosphate-receptors-and-camkii
#4
Krishna P Subedi, Min-Jeong Son, Bojjibabu Chidipi, Seong-Woo Kim, Jun Wang, Kyeong-Hee Kim, Sun-Hee Woo, Joon-Chul Kim
BACKGROUND/AIMS: Endothelin-1 (ET-1) and the α<Sub>1</Sub>-adrenoceptor agonist phenylephrine (PE) activate cAMP response element binding protein (CREB), a transcription factor implicated in cardiac hypertrophy. The signaling pathway involved in CREB activation by these hypertrophic stimuli is poorly understood. We examined signaling pathways for ET-1- or PE-induced cardiac CREB activation. METHODS: Western blotting was performed with pharmacological and genetic interventions in rat ventricular myocytes...
January 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214881/attenuation-of-low-ambient-temperature-induced-myocardial-hypertrophy-by-atorvastatin-via-promoting-bcl-2-expression
#5
Jing Liang, Kun Yin, Xuefeng Cao, Zhenbo Han, Qi Huang, Lai Zhang, Wenya Ma, Fengzhi Ding, Chongwei Bi, Dan Feng, Zhenwei Pan, Yu Liu
BACKGROUND/AIMS: It is well documented that myocardial hypertrophy is associated with low ambient temperature. Atorvastatin (Atv) has been shown to protect against atherosclerosis, cardiac fibrosis, ischemia/reperfusion injury, etc. In this study, we aim to determine whether atorvastatin is effective in the treatment of myocardial hypertrophy induced by cold exposure and to shed light on underlying mechanism. METHODS: The mice aged 4-week were randomized to Control (Ctl) group (raised at room temperature), Cold group (raised at 3-5ºC) and Atv treatment group (raised at 3-5ºC followed by 10mg/kg/day Atv infusion)...
January 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214879/thiamine-deprivation-produces-a-liver-atp-deficit-and-metabolic-and-genomic-effects-in-mice-findings-are-parallel-to-those-of-biotin-deficiency-and-have-implications-for-energy-disorders
#6
Alain de J Hernandez-Vazquez, Josue Andres Garcia-Sanchez, Elizabeth Moreno-Arriola, Ana Salvador-Adriano, Daniel Ortega-Cuellar, Antonio Velazquez-Arellano
Thiamine is one of several essential cofactors for ATP generation. Its deficiency, like in beriberi and in the Wernicke-Korsakoff syndrome, has been studied for many decades. However, its mechanism of action is still not completely understood at the cellular and molecular levels. Since it acts as a coenzyme for dehydrogenases of pyruvate, branched-chain keto acids, and ketoglutarate, its nutritional privation is partly a phenocopy of inborn errors of metabolism, among them maple syrup urine disease. In the present paper, we report metabolic and genomic findings in mice deprived of thiamine...
February 18, 2017: Journal of Nutrigenetics and Nutrigenomics
https://www.readbyqxmd.com/read/28214858/hepatitis-b-virus-core-antigen-stimulates-il-6-expression-via-p38-erk-and-nf-%C3%AE%C2%BAb-pathways-in-hepatocytes
#7
Zhi Chen, Yang-Xia Li, Hai-Jing Fu, Yan-Li Ren, Ling Zou, Shi-Zhen Shen, Ping Chen, Ting Sun, Chun-Hong Huang
BACKGROUND: Hepatitis B virus (HBV) causes both acute and chronic liver injury. Viral proteins are involved in the pathological progress. Hepatitis B core antigen (HBcAg), a component of viral nucleocapsid, is not only essential for HBV lifecycle, but also exhibits strong immunogenicity. The cytoplasmic location of HBcAg in liver biopsy is associated with liver injury and inflammation, but the exact mechanisms remain to be elaborated. METHODS: Huh7, SMMC-7721 and L-02 cells were transfected with pEGFP-N1-HBcAg to establish an intracellular HBcAg expression model...
January 17, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214847/contribution-of-p62-to-phenotype-transition-of-coronary-arterial-myocytes-with-defective-autophagy
#8
Junxiang Bao, Guangbi Li, Xinxu Yuan, Pin-Lan Li, Erich Gulbins
BACKGROUND: Autophagy disorder contributes to dedifferentiation of arterial smooth muscle cells, but the mechanisms are poorly understood. Here, we sought to investigate the role of scaffolding adaptor p62/SQSTM1 (p62) in phenotype switching of mouse coronary arterial myocytes (CAMs) induced by CD38 gene deficiency or lysosomal dysfunction which blocks autophagic flux in the cells. METHODS: Protein expression was measured by western blot analysis and immunofluorescent staining...
February 3, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214834/kidney-injury-molecule-1-is-elevated-in-nephropathy-and-mediates-macrophage-activation-via-the-mapk-signalling-pathway
#9
Lei Tian, Xinghua Shao, Yuanyuan Xie, Qin Wang, Xiajing Che, Minfang Zhang, Weijia Xu, Yao Xu, Shan Mou, Zhaohui Ni
BACKGROUND/AIMS: Kidney injury molecule-1 (KIM-1) is highly expressed in renal tubular cells after injury and is usually regarded as an early biomarker of acute kidney injury(AKI). The aim of this study was to determine the role of KIM-1 in the development of renal tubular injury Methods: Clinical samples, three different animal models and in vitro experiments were utilized to determine the possible mechanism underlying the involvement of KIM-1 in kidney injury. RESULTS: Both plasma and urinary KIM-1 expression levels were significantly higher in AKI and chronic kidney disease (CKD) patients than in healthy volunteers, and urinary KIM-1 expression was significantly higher in CKD patients than in AKI patients...
February 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214833/nogo-b-facilitates-lps-mediated-immune-responses-by-up-regulation-of-tlr4-signaling-in-macrophage-raw264-7
#10
Ying Zhu, Qiang Tong, Jia Ye, Yunye Ning, Ye Xiong, Meng Yang, Hua Xiao, Jian Lu, Wujian Xu, Jiandong Li, Qiang Li
BACKGROUND/AIMS: Nogo-B, a member of the reticulon family of proteins, is mainly located in the endoplasmic reticulum (ER). Here, we investigate the function and mechanism of Nogo-B in the regulation of TLR4-associated immune responses in the macrophage cell line of RAW264.7. METHODS: Nogo-B was up- and down-regulated through the use of appropriate adenoviral vectors or siRNA, and the effects of Nogo-B on macrophages under liposaccharide (LPS) stimulation were evaluated via western blotting, immunofluorescence, enzyme-linked immunosorbent assay (ELISA), flow cytometric analysis, and transwell assay...
January 30, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214831/p38-mapk-pharmacological-inhibitor-sb203580-alleviates-total-parenteral-nutrition-induced-loss-of-intestinal-barrier-function-but-promotes-hepatocyte-lipoapoptosis
#11
Yong-Tao Xiao, Wei-Hui Yan, Yi Cao, Jun-Kai Yan, Wei Cai
BACKGROUND & AIMS: Our previous studies have provided evidence that p38 mitogen-activated protein kinase (MAPK) is involved in total parenteral nutrition (TPN)-associated complications, but its exact effects and mechanisms have not been fully understood. This study aimed to evaluate the roles of p38 MAPK inhibitor SB203580 in the TPN-induced loss of intestinal barrier function and liver disease. METHODS: A rodent model of TPN was used to analyze the roles of SB203580 in TPN-associated complications...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214829/ephb4-regulates-self-renewal-proliferation-and-neuronal-differentiation-of-human-embryonic-neural-stem-cells-in-vitro
#12
Tingting Liu, Xianwei Zeng, Fangling Sun, Hongli Hou, Yunqian Guan, Deyu Guo, Houxi Ai, Wen Wang, Guojun Zhang
BACKGROUND/AIMS: EphB4 belongs to the largest family of Eph receptor tyrosine kinases. It contributes to a variety of pathological progresses of cancer malignancy. However, little is known about its role in neural stem cells (NSCs). This study examined whether EphB4 is required for proliferation and differentiation of human embryonic neural stem cells (hNSCs) in vitro. METHODS: We up- and down-regulated EphB4 expression in hNSCs using lentiviral over-expression and shRNA knockdown constructs and then investigated the influence of EphB4 on the properties of hNSCs...
February 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214828/role-for-target-of-rapamycin-mtor-signal-pathway-in-regulating-neuronal-injury-after-intracerebral-hemorrhage
#13
Jie-Ping Wang, Meng-Yu Zhang
BACKGROUND/AIMS: Mammalian target of rapamycin (mTOR) is a serine/threonine protein kinase and activation of its signal pathway plays an important role in regulating protein growth and synthesis as well as cell proliferation and survival. In the present study, we examined the contribution of mTOR signal and its downstream products to brain injuries induced by intracerebral hemorrhage (ICH) in rats. METHODS: Western Blot analysis was employed to examine the protein expression of mTOR and its downstream pathway and Caspase-3...
January 18, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214826/emodin-increases-expression-of-insulin-like-growth-factor-binding-protein-1-through-activation-of-mek-erk-ampk%C3%AE-and-interaction-of-ppar%C3%AE-and-sp1-in-lung-cancer
#14
Qing Tang, JingJing Wu, Fang Zheng, Swei Sunny Hann, YuQing Chen
BACKGROUND: Emodin has anti-neoplastic activities on multiple tumors. However, the molecular mechanisms underlying this effect still remain to be fully understood. METHODS: Cell viability and cell cycle distribution were measured using 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assays and flow cytometry, respectively. Cell invasion and migration were examined by transwell invasion and wound healing assays. Western blot analysis was performed to examine the phosphorylation and protein expression of AMP-activated protein kinase alpha (AMPKα), extracellular signaling-regulated kinase 1/2 (ERK1/2), peroxisome proliferators-activated receptor gamma (PPARγ), insulin-like growth factor (IGF) binding protein 1 (IGFBP1) and the transcription factor Sp1...
January 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214672/evaluation-of-molecular-chaperone-drug-function-regorafenib-and-%C3%AE-cyclodextrins
#15
Xiurong Hu, Mengying Sun, Yang Li, Guping Tang
Regorafenib (RG) was an oral multi-kinase inhibitor with poor water solubility. In order to enhance the drug's solubility, dissolution and bioavailability, the binary molecular chaperone drug between RG and β-cyclodetrin (β-CD) had prepared by co-crystallization. The structure of RG-β-CD was characterized by thermal analysis, powder X-ray diffraction, infrared spectroscopy and nuclear magnetic resonance. Phase-solubility study revealed the higher solubility and complexing ability of β-CDwith RG.The solubility and dissolution of RG-β-CD was significantly enhanced in pH 1...
February 7, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28214598/three-stats-are-involved-in-the-regulation-of-the-expression-of-antimicrobial-peptides-in-the-triangle-sail-mussel-hyriopsis-cumingii
#16
Yun-Jia Dai, Kai-Min Hui, Ying-Hao Zhang, Yan Liu, Yu-Qing Wang, Li-Juan Zhao, Li Lin, Lian-Qin Chai, Shun Wei, Jiang-Feng Lan
Janus kinase (Jak) and signal transducers and activators of transcription (STAT) signaling pathway is associated in antiviral and antibacterial immune response. Previous studies primarily investigated the function of STATs in mammals. For most invertebrates, only one STAT was found in each species, such as STAT92E was found in Drosophila melanogaster. The studies, which focus on the functional difference between various STATs in the same species of invertebrate, are limited. In the present study, three STATs (HcSTAT1, HcSTAT2 and HcSTAT3) were identified in triangle shell pearl mussel, Hyriopsis cumingii...
February 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28214593/jak-stat-pathway-directed-therapy-of-t-cell-leukemia-lymphoma-inspired-by-functional-and-structural-genomics
#17
REVIEW
Thomas A Waldmann
Abnormal activation of the γc cytokine JAK/STAT signaling pathway assessed by STAT3 or STAT5b phosphorylation was present in a proportion of many T-cell malignancies. Activating mutations of STAT3/STAT5b and JAK1/3 were present in some but not in all cases with constitutive signaling pathway activation. Using shRNA analysis pSTAT malignant T-cell lines were addicted to JAKs/STATs whether they were mutated or not. Activating JAK/STAT mutations were not sufficient to support leukemic cell proliferation but only augmented upstream pathway signals...
February 15, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28214582/structural-changes-induced-by-l50p-and-i61t-single-mutations-of-ubiquitin-affect-cell-cycle-progression-while-impairing-its-regulatory-and-degradative-functions-in-saccharomyces-cerevisiae
#18
Ankita Doshi, Mrinal Sharma, C Ratna Prabha
Posttranslational conjugation of ubiquitin to proteins either regulates their function directly or concentration through ubiquitination dependent degradation. High degree of conservation of ubiquitin's sequence implies structural and functional importance of the conserved residues. Ubiquitin gene of Saccharomyces cerevisiae was evolved in vitro by us to study the significance of conserved residues. Present study investigates the structural changes in the protein resulting from the single mutations UbS20F, UbA46S, UbL50P, UbI61T and their functional consequences in the SUB60 strain of S...
February 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28214532/smn1-functions-as-a-novel-inhibitor-for-traf6-mediated-nf-%C3%AE%C2%BAb-signaling
#19
Eun Kyung Kim, Eui-Ju Choi
Survival motor neuron (SMN) is a 38-kDa protein, whose deficiency in humans develops spinal muscular atrophy (SMA), an autosomal recessive neurodegenerative disease with muscular atrophy due to motor neuron death in the spinal cord. We now report that SMN prevents the activation of TRAF6 and IκB kinase (IKK) and thereby negatively regulates the NF-κB signaling processes. SMN physically interacted with TRAF6 and with each component of the IKK complex, IKK-α, IKK-β, and IKK-γ in BV2 microglia cells. Moreover, SMN1 inhibited the E3 ubiquitin ligase activity of TRAF6 as well as the kinase activity of IKK...
February 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28214522/prelimbic-cortex-extracellular-signal-regulated-kinase-1-2-activation-is-required-for-memory-retrieval-of-long-term-inhibitory-avoidance
#20
Fei Luo, Jian Zheng, Xuan Sun, Wei-Ke Deng, Fang Liu, Bao-Ming Li
Neural mechanism underlying memory retrieval has been extensively studied in the hippocampus and amygdala. However, little is known about the role of medial prefrontal cortex in long-term memory retrieval. We evaluate this issue in one-trial step-through inhibitory avoidance (IA) paradigm. Our results showed that, 1) inactivation of mPFC by local infusion of GABAA-receptor agonist muscimol caused severe deficits in retrieval of 1-day and 7-day but had no effects on 2-hour inhibitory avoidance memory; 2) the protein level of phosphorylated-ERK1/2 in mPFC were significantly increased following retrieval of 1-day and 7-day IA memory, so did the numbers of phosphorylated-ERK (pERK) and phosphorylated-CREB (pCREB) labeled neurons; 3) intra-mPFC infusion of ERK kinase inhibitor PD98095 significantly reduced phosphorylated ERK1/2 levels and phosphorylated-ERK1/2 and phosphorylated-CREB labeled cells, and severely impaired retrieval of 7-day IA memory when the drugs were administrated 30 min prior to test...
February 15, 2017: Brain Research
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