Publication Date:
1981-04-03
Description:
Radioactive nitrogen-13 from nitrite (NO2-) or nitrate (NO3-) administered intratracheally or intravenously without added carrier to mice or rabbits was distributed evenly throughout most organs and tissues regardless of the entry route or the anion administered. Nitrogen-13 from both anions was distributed uniformly between plasma and blood cells. We found rapid in vivo oxidation of NO2- to NO3- at concentrations of 2 to 3 nanomoles per liter in blood. Over 50 percent oxidation within 10 minutes accounted for the similar nitrogen-13 distributions from both parent ions. The oxidation rates were animal species-dependent. No reduction of 13NO3- to 13NO2- was observed. A mechanistic hypothesis invoking oxidation of 13NO2- by a catalase-hydrogen peroxide complex accounts for the results. These results imply a concentration dependence for the in vivo fate of NO2- or nitrogen dioxide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parks, N J -- Krohn, K J -- Mathis, C A -- Chasko, J H -- Geiger, K R -- Gregor, M E -- Peek, N F -- New York, N.Y. -- Science. 1981 Apr 3;212(4490):58-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209517" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Chromatography, High Pressure Liquid
;
Injections, Intravenous
;
Mice
;
Mice, Inbred BALB C
;
Nitrates/administration & dosage/*metabolism
;
Nitrites/administration & dosage/*metabolism
;
Nitrogen Isotopes
;
Oxidation-Reduction
;
Rabbits
;
Species Specificity
;
Tissue Distribution
;
Trachea
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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