Allolithocholic acid-d4 is intended for use as an internal standard for the quantification of allolithocholic acid by GC- or LC-MS. Allolithocholic acid is a secondary allomonohydroxy bile acid.1 It activates large-conductance calcium-activated potassium channels (BK/KCas; EC50 = 44.21 ?M in Xenopus oocytes expressing the rat channel). Fecal levels of allolithocholic acid are increased in patients with colorectal cancer.2 Allolithocholic acid has also been found in the urine of infants with biliary atresia.3
References:
[1]. Bukiya, A.N., McMillan, J., Parrill, A.L., et al.Structural determinants of monohydroxylated bile acids to activate β1 subunit-containing BK channelsJ. Lipid Res.49(11)2441-2451(2008).
[2]. Tadano, T., Kanoh, M., Kondoh, H., et al.Kinetic analysis of bile acids in the feces of colorectal cancer patients by gas chromatography-mass spectrometry (GC-MS)Rinsho Byori.55(5)417-427(2007).
[3]. Makino, I., Sj?vall, J., Norman, A., et al.Excretion of 3β-hydroxy-5-cholenoic and 3ɑ-hydroxy-5ɑ-cholanoic acids in urine of infants with biliary atresiaFEBS Lett.15(2)161-164(1971).