Methane biogenesis during sodium azide-induced chemical hypoxia in rats

被引:36
作者
Tuboly, Eszter [1 ]
Szabo, Andrea [1 ]
Garab, Denes [1 ]
Bartha, Gabor [1 ]
Janovszky, Agnes [1 ]
Eros, Gabor [1 ]
Szabo, Anna [2 ]
Mohacsi, Arpad [2 ]
Szabo, Gabor [2 ]
Kaszaki, Jozsef [1 ]
Ghyczy, Miklos [1 ]
Boros, Mihaly [1 ]
机构
[1] Univ Szeged, Inst Surg Res, Fac Med, H-6701 Szeged, Hungary
[2] Univ Szeged, Dept Opt & Quantum Elect, Fac Sci & Informat, H-6701 Szeged, Hungary
来源
AMERICAN JOURNAL OF PHYSIOLOGY-CELL PHYSIOLOGY | 2013年 / 304卷 / 02期
关键词
methanogenesis; inflammation; hypoxia; L-alpha-glycerylphosphorylcholine; NITRIC-OXIDE; ULTRAVIOLET-RADIATION; CHOLINE ALPHOSCERATE; OXIDATIVE STRESS; IN-VITRO; GENERATION; MODEL; MULTICENTER; INHIBITION; METABOLISM;
D O I
10.1152/ajpcell.00300.2012
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Tuboly E, Szabo A, Garab D, Bartha G, Janovszky A, Eros G, Szabo A, Mohacsi A, Szabo G, Kaszaki J, Ghyczy M, Boros M. Methane biogenesis during sodium azide-induced chemical hypoxia in rats. Am J Physiol Cell Physiol 304: C207-C214, 2013. First published November 21, 2012; doi:10.1152/ajpcell.00300.2012.-Previous studies demonstrated methane generation in aerobic cells. Our aims were to investigate the methanogenic features of sodium azide (NaN3)-induced chemical hypoxia in the whole animal and to study the effects of L-alpha-glycerylphosphorylcholine (GPC) on endogenous methane production and inflammatory events as indicators of a NaN3-elicited mitochondrial dysfunction. Group 1 of Sprague-Dawley rats served as the sham-operated control; in group 2, the animals were treated with NaN3 (14 mg.kg(-1).day(-1) sc) for 8 days. In group 3, the chronic NaN3 administration was supplemented with daily oral GPC treatment. Group 4 served as an oral antibiotic-treated control (rifaximin, 10 mg.kg(-1).day(-1)) targeting the intestinal bacterial flora, while group 5 received this antibiotic in parallel with NaN3 treatment. The whole body methane production of the rats was measured by means of a newly developed method based on photoacoustic spectroscopy, the microcirculation of the liver was observed by intravital videomicroscopy, and structural changes were assessed via in vivo fluorescent confocal laser-scanning microscopy. NaN3 administration induced a significant inflammatory reaction and methane generation independently of the methanogenic flora. After 8 days, the hepatic microcirculation was disturbed and the ATP content was decreased, without major structural damage. Methane generation, the hepatic microcirculatory changes, and the increased tissue myeloperoxidase and xanthine oxidoreductase activities were reduced by GPC treatment. In conclusion, the results suggest that methane production in mammals is connected with hypoxic events associated with a mitochondrial dysfunction. GPC is protective against the inflammatory consequences of a hypoxic reaction that might involve cellular or mitochondrial methane generation.
引用
收藏
页码:C207 / C214
页数:8
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