کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1935857 | 1050676 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Applicability of new spin trap agent, 2-diphenylphosphinoyl-2-methyl-3,4-dihydro-2H-pyrrole N-oxide, in biological system
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Electron spin resonance using spin-trapping is a useful technique for detecting direct reactive oxygen species, such as superoxide (O2·-). However, the widely used spin trap 2,2-dimethyl-3,4-dihydro-2H-pyrrole N-oxide (DMPO) has several fundamental limitations in terms of half-life and stability. Recently, the new spin trap 2-diphenylphosphinoyl-2-methyl-3,4-dihydro-2H-pyrrole N-oxide (DPhPMPO) was developed by us. We evaluated the biological applicability of DPhPMPO to analyze O2·- in both cell-free and cellular systems. DPhPMPO had a larger rate constant for O2·- and formed more stable spin adducts for O2·- than DMPO in the xanthine/xanthine oxidase (X/XO) system. In the phorbol myristate acetate-activated neutrophil system, the detection potential of DPhPMPO for O2·- was significantly higher than that of DMPO (kDMPO = 13.95 Mâ1 sâ1, kDPhPMPO = 42.4 Mâ1 sâ1). These results indicated that DPhPMPO is a potentially good candidate for trapping O2·- in a biological system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 370, Issue 1, 23 May 2008, Pages 93-97
Journal: Biochemical and Biophysical Research Communications - Volume 370, Issue 1, 23 May 2008, Pages 93-97
نویسندگان
Tomohiro Karakawa, Keizo Sato, Yosuke Muramoto, Yoshihiro Mitani, Masataka Kitamado, Tatsuya Iwanaga, Tetsuji Nabeshima, Kumiko Maruyama, Kazuko Nakagawa, Kazuhiko Ishida, Kazumi Sasamoto,