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Source: Biochimica et Biophysica Acta

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Total 177 results found since Jan 2013.

c-Abl phosphorylation of Yin Yang 1's conserved tyrosine 254 in the spacer region modulates its transcriptional activity.
In conclusion, we demonstrate the novel role of c-Abl kinase in regulation of YY1's transcriptional activity, linking YY1 regulation with c-Abl tyrosine kinase signaling pathways. PMID: 29807053 [PubMed - as supplied by publisher]
Source: Biochimica et Biophysica Acta - May 25, 2018 Category: Biochemistry Authors: Daraiseh SI, Kassardjian A, Alexander KE, Rizkallah R, Hurt MM Tags: Biochim Biophys Acta Source Type: research

ERK5/KLF2 activation is involved in the reducing effects of puerarin on monocyte adhesion to endothelial cells and atherosclerotic lesion in apolipoprotein E-deficient mice.
Abstract Puerarin has properties of anti-oxidation and anti-inflammation, which has been demonstrated protective effects in atherosclerosis and other cardiovascular diseases. However, the detail molecular mechanism still remains unclear. Here, we determined whether the atheroprotective effect of puerarin was by reducing monocyte adhesion and explored the underlying mechanism. The results showed that puerarin dose- and time-dependently reduced oxLDL-induced monocyte THP-1 adhesion to HUVECs and the expression of adhesion-related genes such as VCAM-1, ICAM-1, MCP-1 and IL-8 in HUVECs. Puerarin activated ERK5 phospho...
Source: Biochimica et Biophysica Acta - April 30, 2018 Category: Biochemistry Authors: Deng Y, Lei T, Li H, Mo X, Wang Z, Ou H Tags: Biochim Biophys Acta Source Type: research

Conserved association of Argonaute 1 and 2 proteins with miRNA and siRNA pathways throughout insect evolution, from cockroaches to flies.
PMID: 29656113 [PubMed - as supplied by publisher]
Source: Biochimica et Biophysica Acta - April 12, 2018 Category: Biochemistry Authors: Rubio M, Maestro JL, Piulachs MD, Belles X Tags: Biochim Biophys Acta Source Type: research

FOXO1 inhibition potentiates endothelial angiogenic functions in diabetes via suppression of ROCK1/Drp1-mediated mitochondrial fission.
Abstract Diabetes-induced endothelial cell (EC) dysfunction and neovascularization impairment constitute vascular complications with limited treatment regimens. Transcription factor FOXO1 is a key angiogenic regulator and plays a pathologic role in progression of diabetes. The present study was designed to determine the involvement of FOXO1 in impaired EC function and post-ischemic neovascularization in diabetes and investigate underlying mechanisms. We found that FOXO1-selective inhibitor AS1842856 improved blood flow recovery and capillary density in ischemic hindlimb, and rescued the delay of wound closure with...
Source: Biochimica et Biophysica Acta - April 11, 2018 Category: Biochemistry Authors: Shi Y, Fan S, Wang D, Huyan T, Chen J, Chen J, Su J, Li X, Wang Z, Xie S, Yun C, Li X, Tie L Tags: Biochim Biophys Acta Source Type: research

Apoptosis signal regulating kinase-1 and NADPH oxidase mediate human amylin evoked redox stress and apoptosis in pancreatic beta-cells.
Abstract Misfolded toxic human islet amyloid polypeptide or amylin (hA) and plasma membrane-associated redox complex, NADPH oxidase (NOX), have been implicated in the islet β-cell demise associated with type-2 diabetes mellitus (T2DM). Studies show that hA accumulation is stressful to β-cells and that misfolding of human amylin evokes redox stress and activates mitogen activated protein (MAP) kinases, p38 MAPK and c-Jun N-terminal (JNK) kinase. However, the molecular link and causality between hA-evoked redox stress, NOX activity and MAP kinases signaling in pancreatic β-cells is incompletely understood. Here, ...
Source: Biochimica et Biophysica Acta - April 5, 2018 Category: Biochemistry Authors: Singh S, Bhowmick DC, Pany S, Joe M, Zaghlula N, Jeremic AM Tags: Biochim Biophys Acta Source Type: research

Suberanilohydroxamic acid prevents TGF- β1-induced COX-2 repression in human lung fibroblasts post-transcriptionally by TIA-1 downregulation.
This study aimed to investigate whether COX-2 downregulation induced by the profibrotic cytokine transforming growth factor-β1 (TGF-β1) in normal lung fibroblasts could be prevented by epigenetic inhibitors. We found that COX-2 protein expression and PGE2 production were markedly reduced by TGF-β1 and this was prevented by the pan-histone deacetylase inhibitor suberanilohydroxamic acid (SAHA) and to a lesser extent by the DNA demethylating agent Decitabine (DAC), but not by the G9a histone methyltransferase (HMT) inhibitor BIX01294 or the EZH2 HMT inhibitor 3-deazaneplanocin A (DZNep). However, chromatin immunoprecipita...
Source: Biochimica et Biophysica Acta - March 16, 2018 Category: Biochemistry Authors: Pasini A, Brand OJ, Jenkins G, Knox AJ, Pang L Tags: Biochim Biophys Acta Source Type: research

Decrease in paracellular permeability and chemosensitivity to doxorubicin by claudin-1 in spheroid culture models of human lung adenocarcinoma A549 cells.
Abstract Chemotherapy resistance is a major problem in the treatment of cancer, but the underlying mechanisms are not fully understood. We found that the expression levels of claudin-1 (CLDN1) and 3, tight junctional proteins, are upregulated in cisplatin (CDDP)-resistant human lung adenocarcinoma A549 (A549R) cells. A549R cells showed cross-resistance to doxorubicin (DXR). Here, the expression mechanism and function of CLDN1 and 3 were examined. CLDN1 and 3 were mainly localized at tight junctions concomitant with zonula occludens (ZO)-1, a scaffolding protein, in A549 and A549R cells. The phosphorylation levels ...
Source: Biochimica et Biophysica Acta - March 7, 2018 Category: Biochemistry Authors: Akizuki R, Maruhashi R, Eguchi H, Kitabatake K, Tsukimoto M, Furuta T, Matsunaga T, Endo S, Ikari A Tags: Biochim Biophys Acta Source Type: research

Erythropoietin alleviates hepatic Steatosis by activating SIRT1-mediated autophagy.
Abstract Erythropoietin (EPO), besides its stimulatory effect on erythropoiesis, is beneficial to insulin resistance and obesity. However, its role in hepatic steatosis remains unexplored. Activating autophagy seems a promising mechanism for improving fatty liver disease. The present study investigated the role of EPO in alleviating hepatic steatosis and sought to determine whether its function is mediated by the activation of autophagy. Here, we show that EPO decreased hepatic lipid content significantly in vivo and in vitro. Furthermore, EPO/EPO receptor (EPOR) signalling induced autophagy activation in hepatocy...
Source: Biochimica et Biophysica Acta - March 6, 2018 Category: Biochemistry Authors: Hong T, Ge Z, Meng R, Wang H, Zhang P, Tang S, Lu J, Gu T, Zhu D, Bi Y Tags: Biochim Biophys Acta Source Type: research

Rab7a modulates ER stress and ER morphology.
Abstract The Endoplasmic Reticulum (ER) is a membranous organelle with diverse structural and functional domains. Peripheral ER includes interconnected tubules, and dense tubular arrays called "ER matrices" together with bona fide flat cisternae. Transitions between these states are regulated by membrane-associated proteins and cytosolic factors. Recently, the small GTPases Rab10 and Rab18 were reported to control ER shape by regulating ER dynamics and fusion. Here, we present evidence that another Rab protein, Rab7a, modulates the ER morphology by controlling the ER homeostasis and ER stress. Indeed, inhibition o...
Source: Biochimica et Biophysica Acta - March 2, 2018 Category: Biochemistry Authors: Mateus D, Marini ES, Progida C, Bakke O Tags: Biochim Biophys Acta Source Type: research

Preparation of siRNA encapsulated nanoliposomes suitable for siRNA delivery by simply discontinuous mixing.
In this study, we prepared nanoliposomes encapsulating siRNA by simply discontinuous mixing of lipids in ethanol/ether/water mixture and acidic siRNA solution without use of special equipment. The simple mixing siRNA/liposomal particles (siRNA/SMLs) prepared using ethanol/ether/water (3:1:1) mixture showed 120.4 ± 20.2 nm particle size, 0.174 ± 0.033 polydispersity and 86.5 ± 2.76% siRNA encapsulation rate. In addition, the SMLs almost completely protected the encapsulated siRNA from RNase A digestion. Coupling of anti-human epidermal growth factor receptor (EGFR) Fab' to siRNA/SMLs enhanced EGFR-specific ...
Source: Biochimica et Biophysica Acta - February 28, 2018 Category: Biochemistry Authors: Mokhtarieh AA, Lee J, Kim S, Lee MK Tags: Biochim Biophys Acta Source Type: research

Expression and therapeutic implications of cyclin-dependent kinase 4 (CDK4) in osteosarcoma.
Abstract Overexpression and/or hyperactivation of cyclin-dependent kinase 4 (CDK4) has been found in many types of human cancers, and a CDK4 specific inhibitor, palbociclib, has been recently approved by the FDA for the treatment of breast cancer. However, the expression and the therapeutic potential of CDK4 in osteosarcoma remain unclear. In the present study, CDK4 was found to be highly expressed in human osteosarcoma tissues and cell lines as compared with normal human osteoblasts. Elevated CDK4 expression correlated with metastasis potential and poor prognosis in osteosarcoma patients as determined by immunohi...
Source: Biochimica et Biophysica Acta - February 13, 2018 Category: Biochemistry Authors: Zhou Y, Shen JK, Yu Z, Hornicek FJ, Kan Q, Duan Z Tags: Biochim Biophys Acta Source Type: research

Mechanisms of canalicular transporter endocytosis in the cholestatic rat liver.
In conclusion, our findings show that CME is the mechanism responsible for the internalization of the canalicular transporters BSEP and MRP2 in E17G-induced cholestasis. The shift of these transporters from raft to non-raft microdomains could be a prerequisite for the transporters to be endocytosed under cholestatic conditions. PMID: 29355600 [PubMed - as supplied by publisher]
Source: Biochimica et Biophysica Acta - January 17, 2018 Category: Biochemistry Authors: Miszczuk GS, Barosso IR, Larocca MC, Marrone J, Marinelli RA, Boaglio AC, Sánchez Pozzi EJ, Roma MG, Crocenzi FA Tags: Biochim Biophys Acta Source Type: research

Retinoic acid promotes stem cell differentiation and embryonic development by transcriptionally activating CFTR.
Abstract Retinoic acid (RA) plays a pivotal role in many cellular processes; however, the signaling mechanisms mediating the effect of RA are not fully understood. Here, we show that RA transcriptionally upregulates cystic fibrosis transmembrane conductance regulator (Cftr) by promoting the direct binding of its receptor RARα to Cftr promoter in mouse spermatogonia and embryonic stem (ES) cells. The RA/CFTR pathway is involved in the differentiation of spermatogonia and organogenesis during the embryo development of Xenopus laevis. Loss of CFTR by siRNA-mediated knockdown blunts the RA-induced spermatogonial diff...
Source: Biochimica et Biophysica Acta - January 8, 2018 Category: Biochemistry Authors: Li X, Fok KL, Guo J, Wang Y, Liu Z, Chen Z, Wang C, Ruan YC, Yu SS, Zhao H, Wu J, Jiang X, Chan HC Tags: Biochim Biophys Acta Source Type: research

Effects of siRNA-dependent knock-down of cardiolipin synthase and tafazzin on mitochondria and proliferation of glioma cells.
This study aimed to separate the effects of CL content and CL composition from cellular free fatty acid distribution on bioenergetics and proliferation in C6 glioma cells. To this end, cardiolipin synthase and the CL remodelling enzyme, tafazzin, were knocked-down by siRNA in C6 cells. After 72 h of cultivation, we analysed CL composition by means of LC/MS/MS, distribution of cellular fatty acids by means of gas chromatography, and determined oxygen consumption and proliferation. Knock-down of cardiolipin synthase affected the cellular CL content in the presence of linoleic acid (LA) in the culture medium. Knock-down of ta...
Source: Biochimica et Biophysica Acta - January 8, 2018 Category: Biochemistry Authors: Ohlig T, Le DV, Gardemann A, Wolke C, Gürtler S, Peter D, Schild L, Lendeckel U Tags: Biochim Biophys Acta Source Type: research

The E3 ubiquitin ligase, HECTD1, is involved in ABCA1-mediated cholesterol export from macrophages.
In conclusion, we have identified a new candidate, the E3 ubiquitin ligase HECTD1, that may be involved in the regulation of ABCA1-mediated cholesterol export from unloaded macrophages to apoA-I. The exact mechanism by which this ligase affects this pathway remains to be elucidated. PMID: 29306077 [PubMed - as supplied by publisher]
Source: Biochimica et Biophysica Acta - January 3, 2018 Category: Biochemistry Authors: Aleidi SM, Yang A, Sharpe LJ, Rao G, Cochran BJ, Rye KA, Kockx M, Brown AJ, Gelissen IC Tags: Biochim Biophys Acta Source Type: research