alexa Basic studies on 5-(7-hydroxy-3-O-phosphonocholyl)aminosalicylic acid for the evaluation of microbial overgrowth.
Chemistry

Chemistry

Medicinal Chemistry

Author(s): Konishi T, Takahashi M, Ohta S

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Abstract A newly synthesized conjugate of 7-hydroxy-3-O-phosphonocholic acid (ursodeoxycholic acid monophosphate) with 5-aminosalicylic acid (5-ASA-UDCA monophosphate) was investigated to determine its suitability for the evaluation of enteric bacteria. This compound, 5-ASA-UDCA monophosphate, was efficiently deconjugated by cholylglycine hydrolase to release 5-ASA, whereas it was completely resistant to deconjugation by pancreatic and intestinal mucosal enzymes. In everted gut sac experiments, 5-ASA-UDCA monophosphate was not actively absorbed from any part of the small intestine. In animal experiments, urinary excretions of N-acetyl-5-ASA (Ac-5ASA) were measured for 24 h following the oral administration of 20 mg of 5-ASA-UDCA monophosphate. Control rats excreted 276.3 +/- 89.0 micrograms (mean +/- S.E.) of Ac-5ASA, whereas the rats with intestinal bacterial overgrowth excreted more (1224.1 +/- 231.5 micrograms; p < 0.01). These basic studies indicate that this compound is likely to offer a simple method for the evaluation of microbial overgrowth without the use of radioisotopes or expensive, special apparatus.
This article was published in Biol Pharm Bull and referenced in Medicinal Chemistry

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