Abstract:
:The solvation properties of ubiquinone-10 and ubiquinol-10 in a wide variety of solvents of polarity varying from alkanes to water are reported. Greatest solubility is observed in solvents of intermediate polarity and particularly where low polarity is combined with a pronounced tendency to interact with the benzoquinone substituent of the ubiquinone molecule. This includes solvents like chloroform and benzene. Ubiquinone-10 is somewhat less polar than ubiquinol-10 as judged by comparative solubilities of the two molecules. Proton-NMR chemical shift measurements and aggregation studies in selected solvents indicate that in ubiquinone-10 in the liquid phase and in solution in hydrocarbons like dodecane the molecules have a preferred association possibly involving stacking of the benzoquinone rings. Surface balance studies indicated that the surface-active character of ubiquinone-10 is relatively weak and only in a comparatively polar and highly structured solvent, formamide, was there evidence of an effect on surface tension of the solvent. The critical micelle concentration in this solvent was estimated to be about 5 microM on the basis of surface tension measurements. Ubiquinone-10 is well known to form virtually insoluble monolayers at the air/water interface. Studies of the partition of ubiquinone-10 in binary mixtures of solvents suggest that the interaction of the benzoquinone ring substituent with structured polar solvents is considerably weaker than the internal cohesion between molecules of the solvent. No evidence on the basis of wide-angle X-ray diffraction measurements was obtained to indicate that solvent molecules were a component of the crystal lattice of ubiquinone-10 that had precipitated from solvent mixtures.
journal_name
Biosci Repjournal_title
Bioscience reportsauthors
Ondarroa M,Sharma SK,Quinn PJdoi
10.1007/BF01117101subject
Has Abstractpub_date
1986-09-01 00:00:00pages
783-96issue
9eissn
0144-8463issn
1573-4935journal_volume
6pub_type
杂志文章abstract::This review covers the recent progress in the elucidation of the structure of photosystem II (PSII). Because much of the structural information for this membrane protein complex has been revealed by electron microscopy (EM), the review will also consider the specific technical and interpretation problems that arise wi...
journal_title:Bioscience reports
pub_type: 杂志文章,评审
doi:10.1007/BF01206204
更新日期:1996-04-01 00:00:00
abstract::Amphiphilic anionic peptides have been used to enhance the efficiency of transfection by helping plasmids to escape from endosomes to the cytosol. It has been shown that efficiency of an eicosamers containing five glutamyl residues (E5), can be considerably enhanced either by transforming it into a dimer or by adding ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1023/a:1010382001654
更新日期:2000-10-01 00:00:00
abstract::Poly(A)+RNA was isolated from brown adipose tissue of cold acclimated rats and a fraction enriched for uncoupling protein mRNA was used to generate a cDNA library in pBR 322. Immunological screening of 1,500 colonies with an affinity-purified antiserum against the uncoupling protein yielded five positive clones, pUCPr...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01145183
更新日期:1986-01-01 00:00:00
abstract::The high proliferation rate of tumor cells demands high energy and metabolites that are sustained by a high glycolytic flux known as the 'Warburg effect'. The activation and further metabolism of glucose is initiated by hexokinase, a focal point of metabolic regulation. The human hexokinase 2 (HK2) is overexpressed in...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20171666
更新日期:2018-02-21 00:00:00
abstract::Dendritic cells (DCs) present exogenous antigens on major histocompatibility complex (MHC) class I molecules, thereby activating CD8+ T cells, contributing to tumor elimination through a mechanism known as antigen cross-presentation. A variety of factors such as maturation state of DCs, co-stimulatory signals, T-cell ...
journal_title:Bioscience reports
pub_type: 杂志文章,评审
doi:10.1042/BSR20193220
更新日期:2019-10-30 00:00:00
abstract::Reactive oxygen species (ROS) overproduction and renal tubular epithelial cell (TEC) apoptosis are key mechanisms of contrast-induced acute kidney injury (CI-AKI). Mitochondria are the main source of intracellular ROS. In the present study, the characteristics of mitophagy and the effects of rapamycin on contrast-indu...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20180876
更新日期:2018-11-20 00:00:00
abstract::The existence of cancer stem cells (CSCs) is considered as a direct reason for the failure of clinic treatment in hepatocellular carcinoma (HCC). Growing evidences have demonstrated that miRNAs play an important role in regulation of stem cell proliferation, differentiation and self-renewal and their aberrances cause ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20150084
更新日期:2015-05-22 00:00:00
abstract::Recent experimental evidence increasingly shows that the dysregulation of cellular bioenergetics is associated with a wide array of common human diseases, including cancer, neurological diseases and diabetes. Respiration provides a vital source of cellular energy for most eukaryotic cells, particularly high energy dem...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20160083
更新日期:2016-06-30 00:00:00
abstract::A key mechanism mediating cellular adaptive responses to hypoxia involves the activity of hypoxia-inducible factor 1 (HIF-1), a transcription factor composed of HIF-1α, and HIF-1β subunits. The classical mechanism of regulation of HIF-1 activity involves destabilisation of HIF-1α via oxygen-dependent hydroxylation of ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20192345
更新日期:2020-01-31 00:00:00
abstract::Human endothelial cells from the umbilical vein and skin fibroblasts can be separated by means of centrifugation in a density gradient of Percoll. Cells show a good recovery in culture. Viability is not impaired. ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01116944
更新日期:1985-06-01 00:00:00
abstract::Growing evidence has uncovered that SLC34A2 plays an evident role in the progression in several types of tumors. However, the biological function and underlying molecular mechanisms of SLC34A2 remain largely unknown. Here, we indicated that SLC34A2 expression was markedly increased in SW480 and HT29 cell line cells co...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20180268
更新日期:2019-05-21 00:00:00
abstract:BACKGROUND:Breast cancer (BC) is the most common malignancy among females worldwide. The tumor microenvironment usually prevents effective lymphocyte activation and infiltration, and suppresses infiltrating effector cells, leading to a failure of the host to reject the tumor. CC chemokines play a significant role in in...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20202042
更新日期:2020-11-27 00:00:00
abstract::Extracts from uterine cervical and body cancers, but not from benign tumor or intact tissues tested, were found to contain a growth-promoting activity which induced the proliferation of human endometrial fibroblasts. Exposure of cultured fibroblasts to the cancer extracts increased the rate of [3H]thymidine incorporat...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01116850
更新日期:1990-02-01 00:00:00
abstract::Aspergillus fumigatus is the causative agent of IA (invasive aspergillosis) in immunocompromised patients. It possesses a cell wall composed of chitin, glucan and galactomannan, polymeric carbohydrates synthesized by processive glycosyltransferases from intracellular sugar nucleotide donors. Here we demonstrate that A...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20130053
更新日期:2013-09-04 00:00:00
abstract::An ontogenetic study of the effect of various neurohormones and other activators on adenylate cyclase systems was carried out using cultures of cells from 15-d-old embryonic mouse brain. Dopamine stimulated the enzyme activity at earlier culture ages (i.e. 4 and 10 d) but had little stimulatory effect at later ages (i...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/BF01117073
更新日期:1985-07-01 00:00:00
abstract::Common colds were shortened by 7 days in a 1984 clinical trial using zinc gluconate throat lozenges each 2 h. Between then and 2004, 10 other double-blind, placebo-controlled clinical trials showed widely varying results. This re-analysis of these trials presents solution chemistry methods to elucidate differences in ...
journal_title:Bioscience reports
pub_type: 杂志文章,meta分析
doi:10.1023/b:bire.0000037754.71063.41
更新日期:2004-02-01 00:00:00
abstract::Retinitis pigmentosa (RP) is a group of hereditary, degenerative retinal disorders characterized by progressive retinal dysfunction, outer retina cell loss, and retinal tissue atrophy. It eventually leads to tunnel vision and legal, or total blindness. Here we aimed to reveal the causal gene and mutation contributing ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20171300
更新日期:2018-04-27 00:00:00
abstract::Endothelin-1 (ET-1) and plasminogen activator inhibitor-1 (PAI-1) play important roles in pulmonary hypertension (PH) in sickle cell disease (SCD). Our previous studies show higher levels of placenta growth factor (PlGF) in SCD correlate with increased plasma levels of ET-1, PAI-1, and other physiological markers of P...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20150190
更新日期:2015-10-12 00:00:00
abstract:AIM:IgA nephropathy (IgAN) is one of the most common chronic glomerulonephritis. Its etiology and pathogenesis remain unclear. We thus explored the immune repertoire of the B-cell receptor (BCR) and the heavy-chain complementarity-determining region 3 (CDR3) in renal tissue and peripheral blood of IgAN patients. METHO...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20190482
更新日期:2019-10-30 00:00:00
abstract::Ca-ATPase activity in sarcoplasmic reticulum (SR) membranes isolated from skeletal muscles of the typical hibernator, the ground squirrel Spermophilus undulatus, is about 2-fold lower than that in SR membranes of rats and rabbits and is further decreased 2-fold during hibernation. The use of carbocyanine anionic dye S...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1023/a:1015540909212
更新日期:2001-12-01 00:00:00
abstract::NMR is ideal for characterizing non-enzymatic protein glycation, including AGEs (advanced glycation endproducts) underlying tissue pathologies in diabetes and ageing. Ribose, R5P (ribose-5-phosphate) and ADPR (ADP-ribose), could be significant and underinvestigated biological glycating agents especially in chronic inf...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20130135
更新日期:2014-04-01 00:00:00
abstract::Ric c1, an allergenic protein from Ricinus communis , is an insect α-amylase inhibitor that has become an occupational allergen. Ric c1 can cross-react with allergens from wheat, soybean, peanut, shrimp, fish, gluten, house dust, tobacco, and air fungus, thereby amplifying the concern and risks caused by Ricinus aller...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20171245
更新日期:2018-02-14 00:00:00
abstract::Background: Single-nucleotide polymorphisms (SNPs) in lncRNAs could be biomarkers for susceptibility to colorectal cancer (CRC), but the association of PCAT1 polymorphisms and CRC susceptibility is yet to be studied. Methods: Five tagSNPs covering the PCAT1 gene were detected through Kompetitive Allele-Specific PCR am...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20190708
更新日期:2019-07-12 00:00:00
abstract::The association between dietary protein intake and ovarian cancer had been inconsistent in the previous epidemiological studies. The aim of the present study was to identify and synthesize all citations evaluating the relationship on ovarian cancer with protein intake. The search included PubMed, Embase, and Web of Sc...
journal_title:Bioscience reports
pub_type: 杂志文章,meta分析
doi:10.1042/BSR20181857
更新日期:2018-12-11 00:00:00
abstract::Chitinases catalyze the degradation of chitin, a ubiquitous polymer generated from the cell walls of fungi, shells of crustaceans, and cuticles of insects. They are gaining increasing attention in medicine, agriculture, food and drug industries, and environmental management. Their roles in the degradation of chitin fo...
journal_title:Bioscience reports
pub_type: 杂志文章,评审
doi:10.1042/BSR20180323
更新日期:2018-08-29 00:00:00
abstract::The family of 5-HT4 receptors comprises 16 putative splice variants. We have previously shown that there are differences in signal transduction of the h5-HT(4a) and h5-HT(4b) receptors. In the present study, the internalization of these two splice variants following receptor stimulation was investigated with confocal ...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1007/s10540-005-2582-5
更新日期:2004-06-01 00:00:00
abstract:BACKGROUND:Glioblastoma (GBM) is the most common malignant brain tumor with a poor prognosis. The initial treatment for high-grade gliomas is surgical excision. However, even with concomitant use of radiation or chemotherapy, patients are still prone to recurrence. The specific pathogenesis of GBM is still controversia...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20201401
更新日期:2020-06-26 00:00:00
abstract::Activatable cell-penetrating peptides (aCPPs) allow non-viral, low cytotoxic and selective delivery of compounds into target cells for cancer therapy. In tumour cells, up-regulation of human telomerase reverse transcriptase (hTERT) frequently occurs and is being considered as a target in cancer diagnosis and treatment...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20140145
更新日期:2015-03-18 00:00:00
abstract::Canstatin, the non-collagenous domain of collagen type IV α-chains, belongs to a series of collagen-derived angiogenic inhibitors. In this study, the inhibitory effect of recombinant canstatin on tumour growth was investigated using a gastric cancer xenograft model. The volume and weight of tumours in mice treated wit...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20140012
更新日期:2014-04-01 00:00:00
abstract::To investigate whether the human anti-thrombospondin type 1 domain-containing 7A (THSD7A) antibody-induced membranous nephropathy (MN) is mediated by activating lectin complement pathway. Automatic biochemical apparatus was used to assess renal function of mice. The serum levels of anti-THSD7A antibodies and complemen...
journal_title:Bioscience reports
pub_type: 杂志文章
doi:10.1042/BSR20180131
更新日期:2018-06-21 00:00:00