Biochemical and Biophysical Research Communications Journal Impact Factor & Information

Publisher: Elsevier

Journal description

Biochemical and Biophysical Research Communications is the premier international journal devoted to the very rapid dissemination (six weeks) of timely and significant experimental results in the diverse fields of biological research. Frequent publication (36 issues per year) ensures a steady stream of information. The development of the "Breakthroughs and Views" section brings the minireview format to the journal. In addition, the editors have expanded the journalís scope. Research Areas now include: Biochemistry Cell Biology; Developmental Biology; Immunology; Neurobiology; Biophysics; Molecular Biology; Plant Biology.

Current impact factor: 2.28

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 2.281
2012 Impact Factor 2.406
2011 Impact Factor 2.484
2010 Impact Factor 2.595
2009 Impact Factor 2.548
2008 Impact Factor 2.648
2007 Impact Factor 2.749
2006 Impact Factor 2.855
2005 Impact Factor 3
2004 Impact Factor 2.904
2003 Impact Factor 2.836
2002 Impact Factor 2.935
2001 Impact Factor 2.946
2000 Impact Factor 3.055
1999 Impact Factor 3.161
1998 Impact Factor 2.78
1997 Impact Factor 2.671
1996 Impact Factor 2.872
1995 Impact Factor 3.179
1994 Impact Factor 3.4
1993 Impact Factor 3.312
1992 Impact Factor 3.583

Impact factor over time

Impact factor
Year

Additional details

5-year impact 2.50
Cited half-life 8.50
Immediacy index 0.40
Eigenfactor 0.14
Article influence 0.78
Website Biochemical and Biophysical Research Communications website
Other titles Biochemical and biophysical research communications (Online), Biochemical and biophysical research communications
ISSN 1090-2104
OCLC 35247010
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Elsevier

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Pre-print allowed on any website or open access repository
    • Voluntary deposit by author of authors post-print allowed on authors' personal website, arXiv.org or institutions open scholarly website including Institutional Repository, without embargo, where there is not a policy or mandate
    • Deposit due to Funding Body, Institutional and Governmental policy or mandate only allowed where separate agreement between repository and the publisher exists.
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months .
    • Set statement to accompany deposit
    • Published source must be acknowledged
    • Must link to journal home page or articles' DOI
    • Publisher's version/PDF cannot be used
    • Articles in some journals can be made Open Access on payment of additional charge
    • NIH Authors articles will be submitted to PubMed Central after 12 months
    • Publisher last contacted on 18/10/2013
  • Classification
    ​ green

Publications in this journal

  • Biochemical and Biophysical Research Communications 06/2015; 461(4):702. DOI:10.1016/j.bbrc.2015.04.101
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    ABSTRACT: Proteins in the haloalkaloic acid dehalogenase (HAD) superfamily, which is one of the largest enzyme families, is generally composed of a catalytic core domain and a cap domain. Although proteins in this family show broad substrate specificities, the mechanisms of their substrate recognition are not well understood. In this study, we identified a new substrate binding motif of HAD proteins from structural and functional analyses, and propose that this motif might be crucial for interacting with hydrophobic rings of substrates. The crystal structure of TON_0338, one of the 17 putative HAD proteins identified in a hyperthermophilic archaeon, Thermococcus onnurineus NA1, was determined as an apo-form at 2.0 Å resolution. In addition, we determined the crystal structure TON_0338 in complex with Mg2+ or N-cyclohexyl-2-aminoethanesulfonic acid (CHES) at 1.7 Å resolution. Examination of the apo-form and CHES-bound structures revealed that CHES is sandwiched between Trp58 and Trp61, suggesting that this Trp sandwich might function as a substrate recognition motif. In the phosphatase assay, TON_0338 was shown to have high activity for flavin mononucleotide (FMN), and the docking analysis suggested that the flavin of FMN may interact with Trp58 and Trp61 in a way similar to that observed in the crystal structure. Moreover, the replacement of these tryptophan residues significantly reduced the phosphatase activity for FMN. Our results suggest that WxxW may function as a substrate binding motif in HAD proteins, and expand the diversity of their substrate recognition mode.
    Biochemical and Biophysical Research Communications 05/2015; 461(1). DOI:10.1016/j.bbrc.2015.03.179
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    ABSTRACT: Dysregulation of PI3K-AKT-mTOR pathway has been reported in various pathologies, such as cancer and insulin resistance. The proline-rich AKT substrate of 40-kDa (PRAS40), also known as AKT substrate 1 (AKT1S1), lies at the crossroads of these cascades and inhibits the activity of the mTOR complex 1 (mTORC1) kinase. This review discusses the role of PRAS40 and possible feedback mechanisms, and alterations in AKT/PRAS40/mTOR signaling that has been implicated in the pathogenesis of tumor progression. Additionally, we probed new datasets extracted from Oncomine, a cancer microarray database containing datasets derived from patient samples, to further understand the role of PRAS40 (AKT1S1). This data strongly supports the hypothesis that PRAS40 may serve as a potential therapeutic target for various cancers.
    Biochemical and Biophysical Research Communications 05/2015;
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    ABSTRACT: High density lipoprotein receptor SR-BI plays a vital role in cholesterol homeostasis. Depletion of SR-BI causes plasma free cholesterol (FC) accumulation, which disrupts erythrocytes membrane and might induce hemolytic anemia. Here we explored the effects of hypercholesteremia, induced by depletion of low density lipoprotein receptor (LDL-R) and high fat diet (HFD) feeding, on plasma FC and possible hemolysis in SR-BI knockout (KO) mice, and the therapeutic effects of a lipid-lowering drug probucol. To determine the effects of LDL-R depletion, SR-BI KO mice were cross-bred with LDL-R KO mice to generate SR-BI/LDL-R double KO (dKO) mice. Compared to control wild type (WT), SR-BI KO and LDL-R KO mice fed normal chow diet (NCD), dKO mice fed NCD had increased plasma FC and developed macrocytic anemia, splenomegaly, jaundice and renal tubular hemosiderin deposition, indicating spontaneous hemolysis. To determine the effects of HFD feeding and probucol therapy, dKO and LDL-R KO mice were fed HFD containing 0.5% cholesterol and 20% fat with or without 1% probucol. HFD further increased plasma FC and aggravated hemolysis while probucol almost normalized plasma FC and corrected hemolysis in dKO mice. We demonstrated that in SR-BI KO mice, hypercholesteremia due to LDL-R deficiency significantly increased plasma FC and induced spontaneous hemolysis, which could be further exacerbated by HFD feeding. Probucol almost normalized plasma FC and corrected diet-aggravated hemolysis in SR-BI KO mice with LDL-R deficiency. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.015
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    ABSTRACT: Abscisic acid (ABA) receptors in plants are thought to be involved in various cellular processes mediated by signal transduction pathways. There are about 14 ABA receptors in Arabidopsis, but only a few have been studied. In this study, we investigated the effect of the disruption and overexpression of an ABA receptor gene, PYL8 (At5g53160) on plant responses to glucose (Glc) and dark-induced leaf senescence. Expression of PYL8 was strongly reduced by Glc treatment. Overexpression of PYL8 in Arabidopsis resulted in significantly reduced seed germination and cotyledon greening under high Glc conditions, while RNAi transgenic lines were more insensitive to Glc stress. Activities of two Glc-responsive genes, Arabidopsis thaliana Hexokinase 1 (AtHXK1) and ABA insensitive 5 (ABI5) were higher in PYL8-overexpressing plants than in the wild-type (WT) plants after Glc treatment, whereas the transcript levels of these genes in RNAi plants decreased. Furthermore, PYL8-overexpressing plants displayed increased yellowing, membrane ion leakage, and reduced chlorophyll content due to dark-induced senescence, and exhibited stronger expression of a group of senescence-inducible genes than did WT. The data show that PYL8 plays essential roles in responses to both Glc and dark-induced senescence in Arabidopsis thaliana. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.010
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    ABSTRACT: There are two classic adipose tissues in mammals, white adipose tissue (WAT) and brown adipose tissue (BAT). It has been well known that browning of WAT can be induced by cold exposure. In this study, to identify the novel cold responsive key miRNAs that are involved in browning, mice were housed at 6°C for 10 days, and deep sequencing of the miRNAs of WAT and BAT was performed. Our data showed that WAT and BAT displayed distinct expression profiles due to their different locations, morphology and biological function. A total of 27 BAT and 29 WAT DE (differentially expressed) miRNAs were identified in response to cold stimulation, respectively (fold change >2 and FDR (false discovery rate) <0.05), of which, 9 were overlapped in both adipose tissues. Furthermore, the potential target genes of the DE miRNAs from BAT and WAT were predicted computationally, and the KEGG pathway analysis revealed the enrichment pathways in cold stimulated adipose tissues. The expression pattern of miR-144-3p/Bmpr1b/Phlda1 and miR-146a-5p/Sphk2 were further measured by qPCR. Finally, we found that miR-146a-5p was significantly induced during the primary adipogenesis caused by BAT differentiation, whereas miR-144-3p was decreased. Our study identifies for the first time the novel miRNAs involved in browning of WAT by sequencing and expands the therapeutic approaches for combating metabolic diseases. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.014
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    ABSTRACT: We have performed microsecond molecular dynamics (MD) simulations and protein pKa calculations of the muscle calcium pump (sarcoplasmic reticulum Ca(2+)-ATPase, SERCA) in complex with sarcolipin (SLN) to determine the mechanism by which SLN inhibits SERCA. SLN and its close analogue phospholamban (PLN) are membrane proteins that regulate SERCA by inhibiting Ca(2+) transport in skeletal and cardiac muscle. Although SLN and PLB binding to SERCA have different functional outcomes on the coupling efficiency of SERCA, both proteins decrease the apparent Ca(2+) affinity of the pump, suggesting that SLN and PLB inhibit SERCA by using a similar mechanism. Recently, MD simulations showed that PLB inhibits SERCA by populating a metal ion-free, partially-protonated E1 state of the pump, E1•H(+)771. X-ray crystallography studies at 40-80 mM Mg(2+) have proposed that SLN inhibits SERCA by populating E1•Mg(2+), an intermediate with Mg(2+) bound near transport site I. To test the mode of SLN inhibition, we performed a 0.5-μs MD simulation of E1•Mg(2+)-SLN in a solution containing 100 mM K(+) and 3 mM Mg(2+), with calculation of domain dynamics in the cytosolic headpiece and side-chain ionization and occupancy in the transport sites. We found that SLN increases the distance between residues E771 and D800, thereby rendering E1•Mg(2+) incapable of producing a competent Ca(2+) transport site I. Following removal of Mg(2+,) a 2-μs MD simulation of Mg(2+)-free SERCA-SLN showed that Mg(2+) does not re-bind to the transport sites, indicating that SERCA-SLN does not populate E1•Mg(2+) at physiological conditions. Instead, protein pKa calculations indicate that SLN stabilizes a metal ion-free SERCA state (E1•H(+)771) protonated at residue E771, but ionized at E309 and D800. We conclude that both SLN and PLB inhibit SERCA by populating a similar metal ion-free intermediate state. We propose that (i) this partially-protonated intermediate serves as the consensus mechanism for SERCA inhibition by other members of the SERCA regulatory subunit family including myoregulin and sarcolamban, and (ii) this consensus mechanism is utilized to regulate Ca(2+) transport in skeletal and cardiac muscle, with important implications for therapeutic approaches to muscle dystrophy and heart failure. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.012
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    ABSTRACT: Macroautophagy (hereafter referred to as autophagy) is a catabolic process for the degradation and recycling of cellular components. Autophagy digests intracellular components, recycling material subsequently used for new protein synthesis. The Ca(2+)- and Mg(2+)-permeable transient receptor potential melastatin 7 (TRPM7) channel underlies the constitutive Ca(2+) influx in some cells. Since autophagy is regulated by cytosolic Ca(2+) level, we set out to determine whether Ca(2+) influx through the TRPM7 channel regulates basal autophagy. When TRPM7 channel expression was induced from HEK293 cells in a nutrient-rich condition, LC3-II level increased indicating the increased level of basal autophagy. The effect of TRPM7 channel on basal autophagy was via Ca(2+)/calmodulin-dependent protein kinase kinase β, and AMP-activated protein kinase pathway. In contrast, the level of basal autophagy was decreased when the endogenous TRPM7 channel in SH-SY5Y cells was down-regulated using short hairpin RNA. Similarly, an inhibitor for TRPM7 channel decreased the level of basal autophagy. In addition, the inhibitory effect of channel inhibitor on basal autophagy was reversed by increasing extracellular Ca(2+)concentration, suggesting that Ca(2+) influx through TRPM7 channel directly links to basal autophagy. Thus, our studies demonstrate the new role of TRPM7 channel-mediated Ca(2+) entry in the regulation of basal autophagy. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.007
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    ABSTRACT: Although palmitoleic acid (C16:1) is associated with arrhythmias, and increases in an age-dependent matter, the effects of L-carnitine, which is essential for the transport of long-chain fatty acids into the mitochondria, are unclear. It has been postulated that L-carnitine may attenuate palmitate (C16:0)-induced mitochondrial dysfunction and the apoptosis of cardiomyocytes. The aim of this study was to elucidate the activity of L-carnitine in the prevention of the palmitoleic acid-induced mitochondrial membrane permeability transition and cytochrome c release using isolated cardiac mitochondria from rats. Palmitoleoyl-CoA-induced mitochondrial respiration was not accelerated by L-carnitine treatment, and this respiration was slightly inhibited by oligomycin, which is an inhibitor of ATP synthase. Despite pretreatment with L-carnitine, the mitochondrial membrane potential decreased and mitochondrial swelling was induced by palmitoleoyl-CoA. In the presence of a combination of L-carnitine and tiron, a free radical scavenger, there was attenuated mitochondrial swelling and cytochrome c release following palmitoleoyl-CoA treatment. We concluded that palmitoleic acid, but not palmitate, induces the cardiac mitochondrial membrane permeability transition despite the presence of L-carnitine. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.011
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    ABSTRACT: Phosphate is essential for cell metabolism in all organisms. As it is often limiting in the soil, plants have evolved various mechanisms to cope with low-phosphate conditions. Here, we report that Aluminum Sensitive 3 and NAP3, two genes previously identified to function in aluminum tolerance, play a critical role in plant response to phosphate deficiency. Two T-DNA insertional alleles of ALS3 gene in Arabidopsis showed hypersensitive responses to phosphate limiting conditions. Compared to the wild type, als3 mutant plants exhibited more severe root growth inhibition and developed more root hairs under phosphate starvation. Interestingly, these phenotypic changes occurred only when the low-phosphate medium is supplemented with sucrose, suggesting that ALS3 regulates low-phosphate response in a sugar-dependent manner. Furthermore, NAP3, a gene encoding the nucleotide binding domain protein that physically interacts with ALS3, was implicated in the same pathway in response to low-P. The nap3 mutant showed the same phenotype as the als3 mutant when grown on phosphate depletion medium. We conclude that ALS3 and NAP3 protein form an ABC transporter complex that is required for sugar-dependent response to phosphate deficiency. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.009
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    ABSTRACT: Exercise and caloric restriction (CR) have been reported to have anti-ageing, anti-obesity, and health-promoting effects. Both interventions increase the level of dehydroepiandrosterone (DHEA) in muscle and blood, suggesting that DHEA might partially mediate these effects. In addition, it is thought that either 5'-adenosine monophosphate-activated protein kinase (AMPK) or peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) mediates the beneficial effects of exercise and CR. However, the effects of DHEA on AMPK activity and PGC-1α expression remain unclear. Therefore, we explored whether DHEA in myotubes acts as an activator of AMPK and increases PGC-1α. DHEA exposure increased glucose uptake but not the phosphorylation levels of Akt and PKCζ/λ in C2C12 myotubes. In contrast, the phosphorylation levels of AMPK were elevated by DHEA exposure. Finally, we found that DHEA induced the expression of the genes PGC-1α and GLUT4. Our current results might reveal a previously unrecognized physiological role of DHEA; the activation of AMPK and the induction of PGC-1α by DHEA might mediate its anti-obesity and health-promoting effects in living organisms. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.013
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    ABSTRACT: Transforming growth factors β (TGF-β) pathway has been proven to play important roles in oncogenesis and angiogenesis of gliomas. MiR-132 might be related to TGF-β signaling pathway and high miR-132 expression was reported to be a biomarker of poor prognosis in patients diagnosed with glioma. However, the expression regulation way involved in TGF-β pathway and clinical significance of miR-132 have not been investigated in glioma cells. Here we reported that the mRNA level of miR-132 and TGF-β concentration were both increased in patients with brain glioma. Correlation analysis revealed that TGF-β concentration was positively correlated with mRNA level of miR-132. In addition, the mRNA level of miR-132 was up-regulated by TGF-β in a concentration-dependent and time-dependent manner. Furthermore, we found that miR-132 was involved in modulation of the TGF-β signaling pathway and down-regulation of SMAD7 expression by directly targeting the SMAD7 3'-UTR. MiR-132 was negatively correlated with SMAD7 in patients with brain glioma. Taken together, our results suggest that miR-132 could be stimulated by TGF-β and might enhance the activation of TGF-β signaling through inhibiting SMAD7 expression in glioma cells. These findings contribute to a better understanding of the mechanism of the activation of TGF-β signaling by miR-132. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.001
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    ABSTRACT: We previously identified 14-3-3β as a tumor-specific isoform of 14-3-3 protein in astrocytoma, but its functional role in glioma cells and underlying mechanisms are poorly understood. In the present study, we investigated the effects of 14-3-3β inhibition in human glioma U87 cells using specific targeted small interfering RNA (siRNA). The results showed that 14-3-3β is highly expressed in U87 cells but not in normal astrocyte SVGp12 cells. Knockdown of 14-3-3β by Si-14-3-3β transfection significantly decreased the cell viability but increased the LDH release in a time-dependent fashion in U87 cells, and these effects were accompanied with G0/G1 cell cycle arrest and apoptosis. In addition, 14-3-3β knockdown induced ER stress in U87 cells, as evidenced by ER calcium release, increased expression of XBP1S mRNA and induction of ER related pro-apoptotic factors. Down-regulation of 14-3-3β significantly decreased the nuclear localization of β-catenin and inhibited Topflash activity, which was shown to be reversely correlated with CHOP. Furthermore, Si-CHOP and sFRP were used to inhibit CHOP and Wnt, respectively. The results showed that the anti-cancer effects of 14-3-3β knockdown in U87 cells were mediated by increased expression of CHOP and followed inhibition of Wnt/β-catenin pathway. In summary, the remarkable efficiency of 14-3-3β knockdown to induce apoptotic cell death in U87 cells may find therapeutic application for the treatment of glioma patients. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.003
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    ABSTRACT: L-selectin, a type I membrane protein, is a leukocyte adhesion molecule that mediates both lymphocyte homing to peripheral lymph nodes and leukocyte accumulation at sites of inflammation. L-selectin is rapidly shed from the cell surface after cellular activation, and the ectodomain thus released is thought to account for high levels of soluble L-selectin in serum. In this study, we report the identification of a novel, naturally occurring isoform of the human L-selectin gene. Sequence analysis revealed that this isoform is generated by an alternative splicing event: the 7th exon of the human L-selectin gene, which encodes the region containing the transmembrane domain, is excluded, predicting a soluble protein product. The mRNA for this splice variant was expressed in lymphoid organs, where conventional L-selectin mRNA was also expressed. Activating T cells increased the variant mRNA and its ratio to the membrane form. Soluble L-selectin translated from the variant mRNA was present in human serum, albeit at a much lower level than that arising from ectodomain shedding, and was markedly elevated in patients with various rheumatic diseases, including rheumatoid arthritis and systemic lupus erythematosus. These observations indicate that some of the soluble L-selectin present in human serum arises through alternative splicing, which may be upregulated during lymphocyte activation in patients with various clinical conditions. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.002
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    ABSTRACT: Caspase-independent, non-apoptotic cell death is an important therapeutic target in myocardial ischemia. Leptin, an adipose-derived hormone, is known to exhibit cytoprotective effects on the ischemic heart, but the mechanisms are poorly understood. In this research, we found that pretreatment of leptin strongly suppressed ischemic-augmented nuclear shrinkage and non-apoptotic cell death on cardiomyocytes. Leptin was also shown to significantly inhibit the activity of iPLA2, which is considered to play crucial roles in non-apoptotic cell death, resulting in effective prevention of ischemia-induced myocyte death. These findings provide the first evidence of a protective mechanism of leptin against ischemia-induced non-apoptotic cardiomyocyte death. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.008
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    ABSTRACT: Constitutive NF-κB activation is required for survival and common feature of activated B cell-like subtype of diffuse large B cell lymphoma (ABC-DLBCL). However, current NF-κB targeting strategies lack cancer cell specificity. Here, we identified a novel inhibitor, piperlongumine, feature direct binding to NF-κB p65 subunit and suppression of p65 nuclear import. This was accompanied by NF-κB reporter activity suppression and NF-κB target gene downregulation. Moreover, mutation of Cys(38) to Ser in p65 abolished this effect of piperlongumine on inhibition of p65 nuclear import. Furthermore, we show that piperlongumine selectively inhibited proliferation and induced apoptosis of ABC-DLBCL cells. Most notably, it has been reported that piperlongumine did not affect normal cells even at high doses and was nontoxic to animals. Hence, our current study provides new insight into piperlongumine's mechanism of action and novel approach to ABC-DLBCL target therapy. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.04.136
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    ABSTRACT: Upon shift to a hypoxic environment, cellular HIF-1α protein is stabilized, with a rapid decline in oxygen-sensitive hydroxylation. Several additional post-translational modifications of HIF-1α are critical in controlling protein stability during hypoxia. In the present study, we showed that SIRT1 stabilizes HIF-1α via direct binding and deacetylation during hypoxia. SIRT1 depletion or inactivation led to reduced hypoxic HIF-1α accumulation, accompanied by an increase in HIF-1α acetylation. Impaired HIF-1α accumulation was recovered upon inhibition of 26S proteasome activity, indicating that SIRT1 is essential for HIF-1α stabilization during hypoxia. Consistently, HIF-1α accumulation was enhanced upon overexpression of wild-type SIRT1, but not its dominant-negative form. SIRT1-mediated accumulation of HIF-1α protein led to increased expression of HIF-1α target genes, including VEGF, GLUT1 and MMP2, and ultimate promotion of cancer cell invasion. These findings collectively imply that hypoxic HIF-1α stabilization requires SIRT1 activation. Furthermore, SIRT1 protection of HIF-1α from acetylation may be a prerequisite for stabilization and consequent enhancement of cell invasion. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.04.119
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    ABSTRACT: Parkin, an E3 ubuquitin ligase associated with Parkinson's disease (PD), has recently been implicated in mediating innate immunity. However, molecular details regarding parkin-mediated immune response remain to be elucidated. Here, we identified mitochondrial TSPO-VDAC complex to genetically interact with parkin in mediating responses against infection and wound in Drosophila. The loss-of-function mutation in parkin results in defective immune response against bacterial infection. Additionally, parkin mutant larvae showed hypersensitivity against wound regardless of bacterial infection. Interestingly, the combinatorial trans-heterozygotic mutations in parkin and TSPO, or parkin and VDAC showed similar lethal tendency with parkin homozygous mutants. Furthermore, knockdown of TSPO alone also resulted in defective response to infection and wound analogously to parkin mutants. Taken together, we propose that parkin cooperates with TSPO-VDAC complex to mediate responses against infection and wound. Copyright © 2015. Published by Elsevier Inc.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.05.006
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    ABSTRACT: Claudins are tetratransmembrane tight junction proteins and play important roles in regulating paracellular permeability of different nephron segments of the kidney. However, the roles of claudins in kidney development remain largely unknown. Here we studied the expression and functions of claudin-6 in Xenopus pronephros development. Xenopus claudin-6 is expressed in the developing pronephric tubule and duct but not glomus. Knockdown of claudin-6 by specific morpholino led to severe defects in pronephros tubular morphogenesis and blocked the terminal differentiation of the tubule cells. The claudin-6 morpholino targeted tubule cells showed failure of apical accumulation of actin and reduced lateral expression of tight junction protein Na/K-ATPase, suggesting an incomplete epithelization likely due to defected cell adhesions and apical-lateral polarity. Our work uncovered a novel role for claudin-6 in embryonic kidney development. Copyright © 2015 Elsevier Inc. All rights reserved.
    Biochemical and Biophysical Research Communications 05/2015; DOI:10.1016/j.bbrc.2015.04.065