Highly Sensitive Fluorescent Method for the Detection of Cholesterol Aldehydes Formed by Ozone and Singlet Molecular Oxygen
作者:Fernando V. Mansano、Rafaella M. A. Kazaoka、Graziella E. Ronsein、Fernanda M. Prado、Thiago C. Genaro-Mattos、Miriam Uemi、Paolo Di Mascio、Sayuri Miyamoto
DOI:10.1021/ac1006427
日期:2010.8.15
critical to avoid the formation of cholesterol aldehydes through Hock cleavage of 5α-hydroperoxycholesterol. In conclusion, PBH can be used as an efficient fluorescent probe for the detection/quantification of cholesterol aldehydes in biological samples. Its analysis by HPLC coupled to a fluorescent detector provides a sensitive and specific way to quantify cholesterol aldehydes in the low femtomol range
Hold on to your palladium! Phosphines have been grafted on magneticCo/Cnanoparticles through π–π interactions. The resulting Pd complexes showed high activity for Suzuki couplings and the system involving a dendritic ligand was recyclable, allowing the preparation of the drug Felbinac over 12 consecutive runs with minimal Pd leaching. After extraction with CH2Cl2, Felbinac met the requirements of
Neutral N-amidothiourea based PET anion sensors bearing a pyrene fluorophore, 1–3, were synthesized and their fluorescent response toward anions was assessed. The anion quenching and binding constants were found to be much higher than those of the corresponding PET sensors bearing a simple thiourea receptor despite a higher oxidation potential of the electron donor and a relatively longer spacer (CH2)3 between the signal reporter and binding receptor in 1–3. This was explained in terms of a much more substantial increase in the electron donating ability of amidothiourea upon anion binding.
A Pyrene-based hydrogel with terminal lactose residue has been developed for the detection of cholera toxin via color changing response, accompanied by gel to sol transition.