Abstract:
:We measured the amounts of total A beta, A beta 1-40 and A beta 1-42/43 in brain tissues using a newly developed ELISA assay and found that the amounts of insoluble A beta 1-42/43 and insoluble A beta 1-40 were linearly related to the amount of A beta deposits or total insoluble A beta at their lower and higher concentrations, respectively. In an experiment to characterize the A beta species in brain homogenates with buffered saline, we unexpectedly detected soluble A beta which was derived from the insoluble amyloid deposits in brain tissue, indicating reversible depolymerization of A beta from insoluble amyloid deposits. To confirm this finding, we performed 5 consecutive washes of insoluble precipitates of AD brains with buffered saline. Both species of A beta were found in all 5 supernatant fractions and their amounts were gradually decreased. The ratio of A beta 1-42/43 to A beta 1-40 was increased with the numbers of washes, indicating that A beta 1-40 existed in an exposed manner as compared to A beta 1-42/43. Thus the present finding is the first biochemical evidence that A beta 1-40 was the predominant species involved in the reversible exchanging reaction on seeding A beta 1-42/43 between the soluble and the insoluble forms (amyloid fibrils).
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Tamaoka A,Kondo T,Odaka A,Sahara N,Sawamura N,Ozawa K,Suzuki N,Shoji S,Mori Hdoi
10.1006/bbrc.1994.2740subject
Has Abstractpub_date
1994-11-30 00:00:00pages
834-42issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(84)72740-9journal_volume
205pub_type
杂志文章abstract::A phospholipase A2, which is immuno-crossreactive with the anti-rat pancreatic phospholipase A2 antibody, is present in rat gastric mucosa. The content of the enzyme in the gastric mucosa was comparable to that in the pancreas, but the specific activity in the gastric mucosa homogenate (60.7 +/- 19.5 nmol/min/mg) was ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(88)80491-1
更新日期:1988-03-30 00:00:00
abstract::To investigate the involvement of nitric oxide (NO) in the pathogenesis of the cardiovascular system with aging, we studied the basal release of NO in cultured endothelial cells isolated from normal human umbilical veins (HUVECs) at different population doubling levels (PDLs). The release of NO was assayed by a newly ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.2153
更新日期:1993-09-15 00:00:00
abstract::Osteoblasts/stromal cells support the formation of osteoclast-like cells (OCL) from osteoclast progenitor cells via expressing a membrane-associated protein, osteoclast differentiation factor (ODF), in the presence of osteotropic factors, whereas the cells secrete a substantial amount of osteoclastogenesis inhibitory ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1999.0524
更新日期:1999-04-21 00:00:00
abstract::The stabilized carbonium ion salt, tropylium tetrafluoroborate, was oxidized to tropone (cycloheptatrienone) by rabbit liver aldehyde oxidase but not by the closely related molybdenum hydroxylase, xanthine oxidase. The tropylium cation is an aromatic hydrocarbon which lacks the aldehyde, imine, or iminium functional g...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(86)90775-8
更新日期:1986-10-30 00:00:00
abstract::The rate limiting step in 5-fluorouracil catabolism is catalyzed by the enzyme dihydropyrimidine dehydrogenase. Since degradation of 5-fluorouracil decreases its efficacy in chemotherapy, the inhibition of its catabolism is a promising tool. We investigated the formation of micronuclei in vitro in mouse L5178Y cells. ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1994.2299
更新日期:1994-09-15 00:00:00
abstract::Recombination in a bovine papillomavirus shuttle vector carrying direct repeats of Moloney murine leukemia virus LTR sequence was examined. Differently from similar vectors carrying direct repeats of SV40 polyA addition signal or neomycin resistance gene, the vector exhibited no homologous recombination between the re...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(91)91362-g
更新日期:1991-08-30 00:00:00
abstract::The fission yeast S-phase regulator Mcl1, an orthologue of budding yeast Ctf4, is an interacting protein of DNA polymerase alpha and an important factor to ensure DNA replication and sister chromatid cohesion. Deletion of this protein results in severe cohesion defects, however, the function and cellular role of this ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2006.09.024
更新日期:2006-11-10 00:00:00
abstract::Hypoxia and the androgen receptor (AR) play important roles in the development and progression of prostate cancer. In this study, the combined effects of dihydrotestosterone (DHT) and hypoxia on AR-mediated transactivation were investigated. Hypoxia alone did not induce a detectable ARE-mediated response in the absenc...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.01.019
更新日期:2012-02-10 00:00:00
abstract::Apolipoprotein E-knockout (ApoE(-/-)) mice, atherosclerosis-prone mice, show an autoimmune response, but the pathogenesis is not fully understood. We investigated the pathogenesis in female and male ApoE(-/-) mice. The spleens of all ApoE(-/-) and C57BL/6 (B6) mice were weighed. The serum IgG level and titers of anti-...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.06.044
更新日期:2012-07-13 00:00:00
abstract::Pulse labeling studies with Bacillus subtilis showed that DuP 721 inhibited protein synthesis. The IC50 of DuP 721 for protein synthesis was 0.25 micrograms/ml but it was greater than 32 micrograms/ml for RNA and DNA synthesis. In cell-free systems, DuP 721 concentrations up to 100 microM did not inhibit peptide chain...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(88)90723-1
更新日期:1988-02-15 00:00:00
abstract::Proton release from HeLa cells is stimulated by external oxidants for the transplasmalemma electron transport enzymes. These oxidants, such as ferricyanide and diferric transferrin, also stimulate cell growth. We now present evidence that proton release associated with the reduction of ferricyanide and diferric transf...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(87)91344-1
更新日期:1987-05-29 00:00:00
abstract::Localization of ATP-binding cassette transporter isoform C1 (ABCC1) to the basolateral membrane of polarized cells is crucial for export of a variety of cellular metabolites; however, the mechanism regulating basolateral targeting of the transporter is poorly understood. Here we describe identification of a basolatera...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2013.10.013
更新日期:2013-11-08 00:00:00
abstract::Autophagy is a biological recycling process via the self-digestion of organelles, proteins, and lipids for energy-consuming differentiation and homeostasis. The Golgi serves as a donor of the double-membraned phagophore for autophagosome assembly. In addition, recent studies have demonstrated that pulmonary and hepati...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2017.11.049
更新日期:2018-01-01 00:00:00
abstract::HERC2 is a giant protein with E3 ubiquitin ligase activity and other known and suspected functions. Mutations of HERC2 are implicated in the pathogenesis of various cancers and result in severe neurological conditions in Herc2-mutant mice. Recently, a pleotropic autosomal recessive HERC2-associated syndrome of intelle...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2019.02.149
更新日期:2019-04-30 00:00:00
abstract::Rab proteins, members of the Ras superfamily of small GTPases, play regulatory roles in intercompartmental vesicular transport. Each step of traffic seems to require the participation of at least one distinct Rab, with the Rab3 subfamily involved in stimulated exocytosis. We report our studies on the murine rab3D gene...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.3032
更新日期:2000-07-14 00:00:00
abstract::We hypothesized that the mutational strand asymmetry is more strongly exerted upon the mitochondrial cytochrome b (Cytb) gene, which is distant from the origin of the light-strand replication (Ori(L)), than upon the ATPase subunit 6 (ATP6) gene, which is close to the Ori(L). To test this hypothesis, we determined the ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2002.6330
更新日期:2002-02-01 00:00:00
abstract::Using genomic restriction analysis of 14 unrelated patients with salt-losing congenital adrenal hyperplasia, we identified three different CA21HB mutation patterns: no detectable restriction fragment abnormalities (16/28 haplotypes), deletion of the active CA21HB gene (9/28), and apparent conversion of the active CA21...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(87)91484-7
更新日期:1987-02-13 00:00:00
abstract::Down syndrome (DS, Trisomy 21) is the most common genetic cause of delayed fetal brain development and postnatal intellectual disability. Although delayed fetal brain development might be involved in intellectual disability, no evidence of an association between these abnormal phenotypes has been shown. To identify mo...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2020.12.026
更新日期:2021-01-08 00:00:00
abstract::In a simple salts medium, monolayers of IEC-6 intestinal cells achieved concentrations of unmetabolized formycin B (an analog of inosine) about 6-fold higher than in the medium. Rates of formycin B influx were a saturable function of Na+ concentrations in the medium. Although IEC-6 cells possess sites with high affini...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(86)90738-2
更新日期:1986-11-14 00:00:00
abstract::alpha-Crystallin, a major eye lens protein, has been shown to function like a molecular chaperone by suppressing the aggregation of other proteins induced by various stress conditions. Ultraviolet (UV) radiation is known to cause structural and functional alterations in the lens macromolecules. Earlier we observed tha...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2001.4642
更新日期:2001-04-06 00:00:00
abstract::Metabolic deregulation accompanying type II diabetes is characterized by insulin resistance in peripheral tissues (liver, muscle, and adipose), mediated by impairments in insulin receptor (IR) signaling. Protein tyrosine phosphatase 1B (PTP1B) has been shown to be a negative regulator of IR autophosphorylation and thu...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2005.02.016
更新日期:2005-04-08 00:00:00
abstract::Angiotensin II (Ang II) and oxidized LDL (Ox-LDL) are risk factors for atherosclerosis, and both of them contribute to macrophage cholesterol accumulation, the hallmark of early atherosclerosis. As Ang II was shown to increase macrophage uptake of Ox-LDL, we investigated the effect of losartan, an Ang II receptor anta...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.2963
更新日期:2000-07-05 00:00:00
abstract::Glutaredoxin 3 (GLRX3) is a member of monothiol glutaredoxins with a CGFS active site that has been demonstrated to function in cellular iron sensing and trafficking via its bound iron-sulfur cluster. Human GLRX3 has been shown to form a dimer that binds two bridging [2Fe-2S] clusters with glutathione (GSH) as a ligan...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2015.08.073
更新日期:2015-09-25 00:00:00
abstract::A human isoform of the vesicle-associated membrane protein-associated proteins (VAPs), VAPB, causes amyotrophic lateral sclerosis eight due to the missense mutation of Pro-56, whereas human VAPA and the yeast VAP Scs2p proteins are not significantly affected by similar mutations. We have found that VAPA and Scs2p have...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2010.12.011
更新日期:2011-01-14 00:00:00
abstract::The ubiquitously expressed Calpains 1 and 2 belong to a family of calcium-dependent intracellular cysteine proteases. Both calpains are heterodimers consisting of a large subunit and a small regulatory subunit encoded by the gene Capns1. To investigate a role for the calpain small subunit in cells of the osteoblast li...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2011.04.134
更新日期:2011-06-03 00:00:00
abstract:BACKGROUND:In diabetic retinopathy, prolonged high-level blood glucose induced significant impairments among various retinal tissues, including retinal pigment epithelial (RPE) cells. In an in vitro model of human RPE cells, we evaluated whether 7,8-Dihydroxyflavone (DHF) may effectively prevent high glucose-induced di...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2017.11.007
更新日期:2018-01-01 00:00:00
abstract::Mutant 6B7 of Salmonella enterica serovar Typhimurium has a transposon inserted in the putative transporter gene yjeH and shows a more-than-fourfold reduction in resistance to ceftriaxone. In this report we have used proteomic analysis to compare outer membrane protein profiles between this mutant and its parental str...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2007.07.090
更新日期:2007-09-28 00:00:00
abstract::Here we integrate multiple Gaussian-functions analysis into fluorescence resonance energy transfer (FRET) two-hybrid assays (Gaussian FRET two-hybrid assay) to determine the stoichiometric ratios of intracellular hetero-oligomers in single living cells. This method adopts in multiple Gaussian-functions to fit the E-co...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2019.03.089
更新日期:2019-05-07 00:00:00
abstract::To identify novel roles of SMALL RUBBER PARTICLE PROTEIN Homolog in the non-rubber-producing plant Arabidopsis (AtSRP1), we isolated a T-DNA-insertion knock-out mutant (FLAG_543A05) and investigated its functional characteristics. AtSRP1 is predominantly expressed in reproductive organs and is localized to lipid dropl...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2016.05.083
更新日期:2016-06-24 00:00:00
abstract::Recent evidence has revealed a novel signaling mechanism through which brown adipose tissue (BAT)-derived exosomal microRNAs (miRNAs) influence hepatic gene expression. Here, we uncover neuronal control of these miRNAs and identify exosomal miR-132-3p as a regulator of hepatic lipogenesis under cold stress conditions....
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2020.05.090
更新日期:2020-09-24 00:00:00