[Study on metabolism of pyridonecarboxylic acid II. Determination of metabolites of (+-)-7-(3-amino-1-pyrrolidinyl)-6-fluoro-1-(2,4-difluorophenyl)- 1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid p-toluenesulfonate hydrate (T-3262) in blood, urine, bile, and feces].
The fate of (+-)-7-(3-amino-1-pyrrolidinyl)-6-fluoro-1-(2,4-difluorophenyl-1,4- dihyro-4-oxo-1,8-naphthyridine-3-carboxylic acid p-toluenesulfonate hydrate (T-3262) was studied using T-3262 and 14C-T-3262 in various animals. 1. Metabolites in serum and urine were assayed for mouse, rat, rabbit, dog and monkey following oral administration of T-3262. In serum, besides unchanged T-3262 base, T-3262A (N-acetylated) was detected in rat, rabbit and monkey; T-3262B (deamino-hydroxylated) was detected in monkey. In urine, unchanged T-3262 base was excreted mainly. But a few of metabolites (T-3262A, T-3262B, T-3262 glucuronide, T-3262A glucuronide, T-3262B glucuronide, and unknown compound M-1) were detected, and species difference existed in types of metabolites. 2. Metabolites in bile and feces were assayed for mouse and rat following oral administration of T-3262 and 14C-T-3262. Metabolites in bile were similar to the urine, but the volume of T-3262A and T-3262A glucuronide was larger than in urine. In feces, the excreted compounds mainly consisted of unchanged T-3262 base. 3. p-Toluenesulfonic acid, which is the counter acid for T-3262 base, was absorbed following the oral administration of T-3262, and excreted in urine in the unchanged form.
Tai
M
M
Research Laboratory, Toyama Chemical Co., Ltd.
Sakai
H
H
Nitta
J
J
Hayakawa
H
H
Sugimoto
Y
Y
Hayashi
K
K
Maeda
T
T
D042462:4-Quinolones; D000818:Animals; D000890:Anti-Infective Agents / Q000097:blood / Q000493:pharmacokinetics* / Q000652:urine; D001646:Bile / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D004285:Dogs; D005243:Feces / Q000032:analysis; D024841:Fluoroquinolones; D008252:Macaca fascicularis; D051379:Mice; D009287:Naphthyridines; D011817:Rabbits; D051381:Rats
D042462:4-Quinolones; D000890:Anti-Infective Agents; D024841:Fluoroquinolones; D009287:Naphthyridines; C055185:tosufloxacin