Marked nitrosation by stimulation with lipopolysaccharide in ascorbic acid-deficient rats.
Marked formation of N-nitrosothioproline (N-nitrosothiazolidine-4-carboxylic acid) by stimulation with Escherichia coli lipopolysaccharide (LPS) was demonstrated in ascorbic acid-deficient mutant rats (osteogenic disorder syndrome rats; ODS rats) unable to synthesize ascorbic acid. The amounts of urinary nitrate and N-nitrosothioproline excretion after thioproline administration was measured in ODS rats with and without ascorbic acid supplement before and after the injection of LPS. LPS caused marked increase of urinary nitrate excretion in both groups. Urinary N-nitrosothioproline excretion increased 6-fold after LPS injection in ODS rats not supplied with ascorbic acid, but supplement with ascorbic acid markedly decreased the excretion of N-nitrosothioproline.
Kosaka
H
H
Division of Environmental Health Research, Osaka Prefectural Institute of Public Health, Japan.
Tsuda
M
M
Kurashima
Y
Y
Esumi
H
H
Terada
N
N
Ito
Y
Y
Uozumi
M
M
D000311:Adrenal Glands / Q000378:metabolism; D000818:Animals; D001205:Ascorbic Acid / Q000378:metabolism*; D001206:Ascorbic Acid Deficiency / Q000503:physiopathology* / Q000652:urine; D001835:Body Weight; D001851:Bone Diseases, Metabolic / Q000235:genetics; D004926:Escherichia coli; D005260:Female; D007668:Kidney / Q000378:metabolism; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008099:Liver / Q000378:metabolism; D009566:Nitrates / Q000652:urine*; D009603:Nitroso Compounds / Q000652:urine*; D051381:Rats; D011922:Rats, Mutant Strains; D013154:Spleen / Q000378:metabolism; D013844:Thiazoles / Q000652:urine*; D053778:Thiazolidines
D008070:Lipopolysaccharides; D009566:Nitrates; D009603:Nitroso Compounds; D013844:Thiazoles; D053778:Thiazolidines; C040387:N-nitrosothiazolidine-4-carboxylic acid; D001205:Ascorbic Acid