Disease relevance of Camphoquinone

• Aqueous styrenated gelatin solution premixed with AdLacZ, adenovirus encoding beta-galactosidase cDNA, and carboxylated camphorquinone (CQ) as a photoinitiator was irradiated with visible light to form a styrenated gelatin gel [1].

High impact information on Camphoquinone

• The chiral method was applied to monitor the stereoselectivity of the biotransformation of a racemic mixture of camphorquinone by yeast [2].
• Also, SBS values of MCD-bonding solutions varied as a function of the CQ and 4E concentrations and passed through a maximum SBS at 21 MPa, which was comparable to that of a commercial control [3].
• The effect of antioxidants on oxidative DNA damage induced by visible-light-irradiated camphorquinone/N,N-dimethyl-p-toluidine [4].
• The MCD/HEMA-based solutions were activated with varied amounts of camphorquinone (CQ) and ethyl 4-dimethylamino benzoate (4E) [3].
• Bis-GMA, TEGDMA, UDMA, MMA, HEMA, HPMA and different ratios of Bis-GMA/TEGDMA were mixed with Camphorquinone and Dimethyl aminoethyle methacrylate as initiator system [5].

Biological context of Camphoquinone

• Effects of sub-toxic concentrations of camphorquinone on cell lipid metabolism [6].
• The biological effects of camphorquinone (CQ), an initiator for light-polymerized resins, have been reported to relate to its ability to generate free radicals and cause radical-induced membrane damage via lipid peroxidation [6].
• The hydrolysis action by water was particularly marked for one resin, which also showed a high release of camphoroquinone-type catalyst [7].

Anatomical context of Camphoquinone

• The spread of polymerization in a camphorquinone activated resin due to 488 nm light emanating from an opaque plastic canal was compared with light emanating from a canal of the same diameter in tooth dentin [8].
• Four camphorquinone-activated resins were placed in the root canals of teeth and tested for polymerization depth using a 488-nm wavelength laser beam coupled to an optical fiber 200 microns in diameter [9].
• ROS formation and glutathione levels in human oral fibroblasts exposed to TEGDMA and camphorquinone [10].
• Cytotoxicity of photosensitizers camphorquinone and 9-fluorenone with visible light irradiation on a human submandibular-duct cell line in vitro [11].
• Camphoroquinone reduction: another reaction catalyzed by rat liver cytosol 3 alpha-hydroxysteroid dehydrogenase [12].

Associations of Camphoquinone with other chemical compounds

• The bis-GMA/TEGDMA/CQ/EDAB, his-GMA/TEGDMA/CQ/NDMH and bis-GMA/NDMH/CQ mixtures were found to have approximately the same glass transition temperature and modulus [13].
• Styrene-derivatized gelatins, synthesized by condensation reaction of gelatin with 4-vinylbenzoic acid, were photopolymerized in the presence of a water-soluble camphorquinone derivative as a photoinitiator upon visible-light irradiation to form swollen gels [14].
• Recent studies have revealed that visible-light (VL)-irradiated camphorquinone (CQ), in the presence of a tertiary amine (e.g., N,N-dimethyl-p-toluidine, DMT), generates initiating radicals that may indiscriminately react with molecular oxygen forming reactive oxygen species (ROS) [15].
• The combination of CQ and NPG was a good visible-light initiator for the polymerization [16].
• The effect of photosensitizer type (CQ or PPD) and ratio (PPD/CQ) on degree of conversion (DC) was investigated using FTIR spectrophotometry [17].

Gene context of Camphoquinone

• These multifunctional, viscous liquid copolymers (molecular weights; approximately 2 x 10(3) to 7 x 10(3) g/mol) were converted to crosslinked solids by visible-light irradiation in the presence of camphorquinone as an initiator [18].
• METHODS: The efficiency of two LED and one QTH lamps were tested comparing their performances with the photoinitiators camphorquinone (CQ); phenylpropanedione (PPD); monoacylphosphine oxide (Lucirin TPO); and bisacylphosphine oxide (Irgacure 819) [19].
• The main identified leachables were: iodobenzene (DPICls-diphenyliodonium chloride degradation product), camphorquinone (photo-initiator), tert-butyl-p-hydroxyanisole (inhibitor), 4-(dimethylamino)ethyl benzoate (co-initiator), ethylene glycol dimethacrylate (monomer) [20].
• Camphorquinone with VL irradiation increased the radical production, whereas 9F with VL irradiation increased ROS production, as well as effecting changes in the DPPC phase-transition properties [21].
• The experimental resin, which was prepared by mixing equivalent weights of Bis GMA and triethyleneglycol-dimethacrylate, was colored by one of three organic dye stuffs, and camphorquinone and dimethyl-p-toluidine were added to activate polymerization [22].

Analytical, diagnostic and therapeutic context of Camphoquinone

• The experiment revealed that the depth of cure test does not and the Knoop hardness test does discriminate between LCUs, used for the polymerization of composites containing photoinitiators in addition to camphorquinone [23].
• At low CQ concentrations, the DC measured by a Fourier Transform Infrared (FTIR) spectrometer increased rapidly with increasing concentration of DMAEMA and reached a plateau [24].
• Active sensitization to camphoroquinone and double active sensitization to acrylics with long-lasting patch test reactions [25].
• METHODS: Complexation of CQ and 4E with MCD was studied by thin layer chromatography [26].

References