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Mass spectrometry and tandem mass spectrometry analysis of rat mitochondrial ATP synthase: up-regulation in pancreatic acinar cells treated with ceruleintreated with cerul

 Ji Hoon Yu  ;  Shin Young Yun  ;  Kyung Hwan Kim  ;  Hyeyoung Kim  ;  Joo Weon Lim 
 PROTEOMICS, Vol.3(12) : 2437-2445, 2003 
Journal Title
Issue Date
Amino Acid Sequence ; Animals ; Cells, Cultured ; Ceruletide/toxicity* ; Electrophoresis, Gel, Two-Dimensional ; Humans ; Mitochondria/drug effects ; Mitochondria/enzymology* ; Mitochondrial Proton-Translocating ATPases/metabolism* ; Molecular Sequence Data ; Pancreas/drug effects ; Pancreas/enzymology* ; Pancreatitis/chemically induced ; Pancreatitis/enzymology ; Rats ; Reactive Oxygen Species/pharmacology ; Spectrometry, Mass, Electrospray Ionization ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization ; Up-Regulation/drug effects*
ATP synthase ; cerulein ; mitochondria ; pancreatic acinar cells ; tandem mass spec-trometry
Mitochondrion is a vulnerable intracellular target to reactive oxygen species (ROS). ROS have been considered to be important regulators of the pathogenesis of pancreatitis. This study aims to determine whether ROS induces mitochondrial damage by monitoring the expression level of mitochondrial ATP synthase as the key molecular component in mitochondria associated with cellular damage. Pancreatic acinar AR42J cells were treated with cerulein which induces symptoms similar to that associated with human acute pancreatitis. Proteins were separated by two-dimensional electrophoresis using pH gradients of 5-8 and identified using matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MS), quadrupole time-of-flight MS and MS/MS with nano-electrospray. Following cerulein treatment, mitochondrial ATP synthase beta chain was highly expressed compared to nontreated cell. The protein was identified by its pI of 5.2 and molecular weight (56 354 Da) with 27 matched peptides. Among the MS spectrum, precursor ions m/z 488.28, 544.81, 631.82, 693.34, 718.38, 729.41, 801.40, 809.39, 825.94, and 994.52 were further identified using MS/MS and confirmed the isolated protein to be mitochondrial ATP synthase beta chain. In conclusion, cerulein-induced oxidative injury may result in the induction of mitochondrial ATP synthase, which may act as an adaptive pathophysiological process in the pancreas.
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pharmacology (약리학교실) > 1. Journal Papers
5. Research Institutes (연구소) > Institute of Gastroenterology (소화기병연구소) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Hwan(김경환)
Lim, Joo Weon(임주원)
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