Showing 1-27 of 27 results for "82663"
S Gatt et al.
The Biochemical journal, 253(2), 377-380 (1988-07-15)
Aqueous dispersions of 12-(1-pyrene)-dodecanoic acid (P12), a medium-chain fatty acid to which the fluorescent probe pyrene has been covalently linked, shows a considerable increase in fluorescence when the probe is introduced into a hydrophobic environment. This enables the uptake of...
P Viani et al.
Biochimica et biophysica acta, 1064(1), 24-30 (1991-04-26)
Two different pyrene derivatives, namely 12-(1-pyrene)dodecanoic acid (P12-FA) and N-(12-(1-pyrene)dodecanoyl)-galactosylsphingosine I3-sulfate (P12-CS) have been used to follow lipid peroxidation both in model and natural membranes. The malondialdehyde (MDA) production in small unilamellar vesicles of dipalmitoylphosphatidylcholine/arachidonic acid (80:20, molar ratio), symmetrically...
K Fukuzawa et al.
BioFactors (Oxford, England), 7(1-2), 31-40 (1998-04-02)
The rate constants (ks) of 1O2 scavenging for alpha-tocopherol (alpha-Toc) and beta-carotene (beta-Car) were measured in liposome membranes, and compared with those in EtOH solution. 1O2 was site-specifically generated by photoirradiation using two photosensitizers, water-soluble Rose bengal (RB) and lipid-soluble...
S Oshima et al.
Journal of nutritional science and vitaminology, 39(6), 607-615 (1993-12-01)
Large unilamellar liposomes comprising of egg yolk phosphatidylcholine (PC) was exposed to photoirradiation in the presence of methylene blue (water-soluble photosensitizer) or 12-(1-pyrene)dodecanoic acid (P-12, lipid-soluble photosensitizer) to estimate the inhibitory effect of beta-carotene and astaxanthin on photosensitized oxidation of...
G Celedón et al.
The American journal of physiology, 275(6 Pt 1), C1429-C1431 (1998-12-09)
Because it has been reported that hypoxia in rats may promote lipid peroxidation and other free radical reactions that could modify membrane lipids and proteins, the effect of acute hypobaric hypoxia on human erythrocyte membranes was investigated. 12-(1-Pyrene)dodecanoic acid fluorescent...
E Fibach et al.
Research in experimental medicine. Zeitschrift fur die gesamte experimentelle Medizin einschliesslich experimenteller Chirurgie, 192(3), 185-196 (1992-01-01)
The effects of photochemotherapy with the fluorescent fatty acid pyrenedodecanoic acid (P12) and long-wavelength ultraviolet (UVA) light on cells derived from human bladder carcinoma were studied. Exposure of these anchorage-dependent cells to P12 either in monolayers of adherent cells or...
E Fibach et al.
Experimental hematology, 18(2), 89-93 (1990-02-01)
Irradiation with long-wave UV light (LUV) at 366 nm of cells that had been incubated with 12-(1-pyrene)dodecanoic acid (P12), a fatty acid derivative with a covalently linked pyrene nucleus, resulted in cytotoxicity. Using the in vitro established human cell lines...
Lucía Fernández-Del-Río et al.
Free radical biology & medicine, 154, 105-118 (2020-05-11)
Coenzyme Q (CoQ) is an essential player in the respiratory electron transport chain and is the only lipid-soluble antioxidant synthesized endogenously in mammalian and yeast cells. In humans, genetic mutations, pathologies, certain medical treatments, and aging, result in CoQ deficiencies...
S Gatt et al.
Indian journal of biochemistry & biophysics, 27(6), 359-362 (1990-12-01)
Administration of pyrene-linked fatty acids and lipids to cultured cells or an enveloped (vesicular stomatitis) virus induced photosensitization which, following irradiation with a long ultra-violet light (LUV), resulted in killing of the cells and loss of the infectivity of the...
E Fibach et al.
Leukemia research, 11(11), 1019-1026 (1987-01-01)
Incubation of cells with 12-(1-pyrene) dodecanoic acid (P12), a fatty acid to which a pyrene nucleus has been covalently linked, followed by irradiation with long-wave ultra-violet light (LUV) at 366 nm, resulted in cytotoxicity. Syntheses of macromolecules was significantly decreased...
W D Picking
Biochemical and biophysical research communications, 195(3), 1153-1158 (1993-09-30)
Monosialoganglioside GM1 labeled with 1-pyrene-dodecanoic acid was used to monitor interactions between cholera toxin and its receptor. Binding of cholera toxin to labeled ganglioside caused a decrease in pyrene fluorescence intensity at 480 nm concomitant with an increase in fluorescence...
S A Rabia et al.
FEBS letters, 270(1-2), 9-10 (1990-09-17)
Vesicular stomatitis virus (VSV) was incubated with pyrene dodecanoic acid (P12), a fluorescent derivative of a medium-chain length fatty acid, and subjected to irradiation with a long wavelength ultra-violet light source at 366 nm (UVA). This inactivated the virus, resulting...
S Gatt et al.
Biochimica et biophysica acta, 943(3), 447-453 (1988-09-01)
Pyrene dodecanoic acid (P12), a medium-chain fatty acid to which the fluorescent probe pyrene is covalently linked, showed a considerable increase in fluorescence when the probe was introduced into a hydrophobic environment. Also, when closely packed in an aggregate, an...
F Ojima et al.
Free radical biology & medicine, 15(4), 377-384 (1993-10-01)
Human plasma and plasma low-density lipoprotein (LDL) were exposed to photoirradiation in the presence of methylene blue (water-soluble photosensitizer) or 12-(1-pyrene)dodecanoic acid (P-12, lipid-soluble photosensitizer). In methylene-blue-sensitized photooxidation of human plasma and LDL, endogenous carotenoids and tocopherols were consumed with...
E Fibach et al.
Experimental cell research, 166(1), 220-228 (1986-09-01)
The uptake of a fluorescent derivative of a fatty acid (FDFA), 12-(1-pyrene) dodecanoic acid (P12) by murine erythroleukemia (MEL) cells was studied. Because of the intense fluorescence of the pyrene ring, the association of P12 with intact cells could be...
Changes in the cellular fatty acid profile drive the proteasomal degradation of ?-synuclein and enhance neuronal survival.
Xylaki, et al.
Faseb Journal, 34, 15123-15145 (2021)
E Spisni et al.
Biochimica et biophysica acta, 1402(1), 61-69 (1998-04-29)
Zellweger fibroblasts, which are devoid of peroxisomes and fail to synthesize plasmalogens, are very sensitive to the killing effect triggered by UV-activated 12-(1-pyrene) dodecanoic acid (P12). Although in some studied performed, it is assumed that reactive oxygen species (ROS) may...
E Fibach et al.
Leukemia research, 16(5), 453-462 (1992-01-01)
Methods for ex vivo purging of neoplastic cells from harvested marrow are being developed to increase the efficacy of autologous transplantation. One approach is selective photosensitization, using sensitizing compounds and light radiation. Pyrene-containing fatty acids and lipids are potent photosensitizers...
E Fibach et al.
Cytometry, 9(6), 525-528 (1988-11-01)
The fluorescence activated cell sorter (FACS) was used for measuring the uptake of the fluorescent fatty acid derivative 12-(1-pyrene) dodecanoic acid (P12) by human peripheral blood cells. The results indicate that blood cells differ widely in their ability to take...
K Okumoto et al.
Experimental cell research, 233(1), 11-20 (1997-05-25)
We made use of the 9-(1'-pyrene)nonanol/ultraviolet (P9OH/UV) method and isolated peroxisome-deficient mutant cells. TKa cells, the wild-type Chinese hamster ovary (CHO) cells, CHO-K1, that had been stably transfected with cDNA encoding Pex2p (formerly peroxisome assembly factor-1, PAF-1) were used to...
M Tarshis et al.
Archives of microbiology, 157(3), 258-263 (1992-01-01)
12-(1-pyrene)dodecanoic fatty acid (P12) uptake by Spiroplasma floricola BNR-1 cells was characterized with regard to its kinetics, specificity, metabolism and susceptibility to protein and lipid inhibitors. The uptake process depended on temperature and pH, and exhibited biphasic saturation kinetics with...
K Fukuzawa et al.
Free radical biology & medicine, 22(5), 923-930 (1997-01-01)
Scavenging of singlet oxygen (1O2) by alpha-tocopherol (alpha-Toc) was investigated in liposomes. 1O2 was generated by photoirradiation in the presence of two photosensitizers, water-soluble methylene blue (MB) and lipid-soluble 12-(1-pyrene)dodecanoic acid (PDA). The rates of oxidation of alpha-Toc differed depending...
N Nahas et al.
Biochimica et biophysica acta, 917(1), 86-91 (1987-01-13)
A procedure is described for the continuous monitoring and recording of fatty acid transport into cultured cells. Uptake of the fluorescent fatty acid derivative, 12-(1-pyrene)dodecanoic acid [P12] by a suspension of human promyelocytic leukemia (HL-60) cells was analyzed and recorded...
E Fibach et al.
Journal of cell science, 85, 149-159 (1986-09-01)
Cells were incubated with 12-(1-pyrene)-dodecanoic acid (P12), a long-chain fatty acid to which a pyrene ring has been attached covalently. This acid was transported across the plasma membranes of cells and subsequently incorporated into their neutral lipids and phospholipids. Irradiation...
F Guerbette et al.
Biochemistry, 38(43), 14131-14137 (1999-11-26)
Plant lipid transfer proteins (LTPs) are soluble proteins which are characterized by their in vitro ability to transfer phospholipids between two membranes. We have compared the functional properties of two LTPs purified from maize and wheat seeds knowing that, despite...
E Fibach et al.
Leukemia research, 13(12), 1099-1104 (1989-01-01)
Incubation of cells with 12-(1-pyrene) dodecanoic acid (P12) followed by irradiation with ultraviolet light at 366 nm (UVA) resulted in cytotoxicity. We compared the photosensitivity to UVA irradiation of various human myelo-monocytic leukemic cell lines, their intra- and inter-clonal variability...
K Tateishi et al.
European journal of cell biology, 73(4), 352-359 (1997-08-01)
We isolated peroxisome biogenesis mutants from Chinese hamster ovary (CHO) cells, using the 9-(1'-pyrene)nonanol/ultraviolet (P9OH/ UV) method and wild-type CHO-K1 cells that had been stably transfected with cDNA encoding Pex2p (formerly peroxisome assembly factor-1, PAF-1). Three mutant cell clones, ZP110...

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