Tags

Type your tag names separated by a space and hit enter

Human kidney flavin-containing monooxygenases and their potential roles in cysteine s-conjugate metabolism and nephrotoxicity.
J Pharmacol Exp Ther. 2003 Jan; 304(1):185-91.JP

Abstract

The potential roles of human hepatic and renal flavin-containing monooxygenases (FMOs) in the metabolism of the cysteine S-conjugates S-allyl cysteine (SAC) and S-(1,2-dichlorovinyl)-L-cysteine (DCVC) were investigated. Incubations of human cDNA-expressed FMO1, FMO3, FMO4, and FMO5 with SAC resulted in detection of SAC sulfoxide, with FMO3 exhibiting approximately 3-, 4-, and 10-fold higher activity than FMO1, FMO4, and FMO5, respectively. DCVC sulfoxide formation was only detected with FMO3 and was 59-fold lower than SAC sulfoxide formation. Incubations of human liver microsomes with SAC or DCVC resulted in detection of the corresponding sulfoxides and provided evidence for the involvement of FMO3. Incubations of SAC or DCVC with human kidney microsomes, however, led only to the detection of SAC sulfoxide. Immunoblots with monospecific antibodies to FMO1, FMO3, and FMO5 in kidney microsomes from 26 humans showed that the average expression levels for FMO1, FMO3, and FMO5 were 5.8 +/- 2.3, 0.5 +/- 0.4, and 2.4 +/- 1.4 pmol/mg (means +/- S.D.), respectively. Interestingly, African-American kidney samples (n = 8) exhibited significantly higher FMO1 levels than Caucasian samples (n = 17), whereas no difference in expression level between males and females was observed with any of the examined FMO isoforms. Collectively, the results provide evidence for the expression of three FMO isoforms in the human kidney and show that the contribution of renal FMOs in cysteine S-conjugate metabolism is likely to vary depending upon the cysteine S-conjugate and the relative expression levels of the active FMOs.

Authors+Show Affiliations

Krause RJ
Department of Comparative Biosciences and Center for Molecular and Environmental Toxicology, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Lash LH
No affiliation info available
Elfarra AA
No affiliation info available

MeSH

AdolescentAdultAgedBlotting, WesternChromatography, High Pressure LiquidCysteineDNA, ComplementaryFemaleHumansIn Vitro TechniquesIsoenzymesKidneyKidney DiseasesMaleMicrosomesMicrosomes, LiverMiddle AgedMonoamine OxidaseRacial GroupsSex CharacteristicsSpectrophotometry, Ultraviolet

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

12490590

Citation

Krause, Renee J., et al. "Human Kidney Flavin-containing Monooxygenases and Their Potential Roles in Cysteine S-conjugate Metabolism and Nephrotoxicity." The Journal of Pharmacology and Experimental Therapeutics, vol. 304, no. 1, 2003, pp. 185-91.
Krause RJ, Lash LH, Elfarra AA. Human kidney flavin-containing monooxygenases and their potential roles in cysteine s-conjugate metabolism and nephrotoxicity. J Pharmacol Exp Ther. 2003;304(1):185-91.
Krause, R. J., Lash, L. H., & Elfarra, A. A. (2003). Human kidney flavin-containing monooxygenases and their potential roles in cysteine s-conjugate metabolism and nephrotoxicity. The Journal of Pharmacology and Experimental Therapeutics, 304(1), 185-91.
Krause RJ, Lash LH, Elfarra AA. Human Kidney Flavin-containing Monooxygenases and Their Potential Roles in Cysteine S-conjugate Metabolism and Nephrotoxicity. J Pharmacol Exp Ther. 2003;304(1):185-91. PubMed PMID: 12490590.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Human kidney flavin-containing monooxygenases and their potential roles in cysteine s-conjugate metabolism and nephrotoxicity. AU - Krause,Renee J, AU - Lash,Lawrence H, AU - Elfarra,Adnan A, PY - 2002/12/20/pubmed PY - 2003/1/24/medline PY - 2002/12/20/entrez SP - 185 EP - 91 JF - The Journal of pharmacology and experimental therapeutics JO - J Pharmacol Exp Ther VL - 304 IS - 1 N2 - The potential roles of human hepatic and renal flavin-containing monooxygenases (FMOs) in the metabolism of the cysteine S-conjugates S-allyl cysteine (SAC) and S-(1,2-dichlorovinyl)-L-cysteine (DCVC) were investigated. Incubations of human cDNA-expressed FMO1, FMO3, FMO4, and FMO5 with SAC resulted in detection of SAC sulfoxide, with FMO3 exhibiting approximately 3-, 4-, and 10-fold higher activity than FMO1, FMO4, and FMO5, respectively. DCVC sulfoxide formation was only detected with FMO3 and was 59-fold lower than SAC sulfoxide formation. Incubations of human liver microsomes with SAC or DCVC resulted in detection of the corresponding sulfoxides and provided evidence for the involvement of FMO3. Incubations of SAC or DCVC with human kidney microsomes, however, led only to the detection of SAC sulfoxide. Immunoblots with monospecific antibodies to FMO1, FMO3, and FMO5 in kidney microsomes from 26 humans showed that the average expression levels for FMO1, FMO3, and FMO5 were 5.8 +/- 2.3, 0.5 +/- 0.4, and 2.4 +/- 1.4 pmol/mg (means +/- S.D.), respectively. Interestingly, African-American kidney samples (n = 8) exhibited significantly higher FMO1 levels than Caucasian samples (n = 17), whereas no difference in expression level between males and females was observed with any of the examined FMO isoforms. Collectively, the results provide evidence for the expression of three FMO isoforms in the human kidney and show that the contribution of renal FMOs in cysteine S-conjugate metabolism is likely to vary depending upon the cysteine S-conjugate and the relative expression levels of the active FMOs. SN - 0022-3565 UR - https://www.unboundmedicine.com/medline/citation/12490590/Human_kidney_flavin_containing_monooxygenases_and_their_potential_roles_in_cysteine_s_conjugate_metabolism_and_nephrotoxicity_ DB - PRIME DP - Unbound Medicine ER -
Grapherence [↓19]

Related Citations

More