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Phase II biotransformation reactions are essential for detoxifying and eliminating xenobiotics, including many pharmaceutical compounds. These reactions typically involve conjugation, the covalent attachment of polar endogenous groups such as glucuronic acid, sulfate, methyl, or acetyl moieties to functional groups introduced during Phase I metabolism. The resulting conjugates are more water-soluble, enabling efficient renal or biliary excretion.The major classes of Phase II enzymes include...
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The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
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Related Experiment Video

Updated: Mar 10, 2026

Quantitative SERS Detection of Uric Acid via Formation of Precise Plasmonic Nanojunctions within Aggregates of Gold Nanoparticles and Cucurbit[n]uril
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[Recent advances in urate metabolism].

Giulia Mori, Riccardo Percudani

    Giornale Italiano Di Nefrologia : Organo Ufficiale Della Societa Italiana Di Nefrologia
    |December 14, 2016
    PubMed
    Summary

    Genomics has revealed complex urate metabolism involving multiple enzymes and transporters, unlike the previous single-enzyme understanding. These discoveries offer new avenues for treating hyperuricemia and related diseases.

    Area of Science:

    • Molecular Biology
    • Genomics
    • Biochemistry

    Background:

    • Genomics and -omics sciences have significantly advanced molecular-level biological understanding.
    • Previously, urate metabolism was thought to involve a single enzyme (urate oxidase) for uricolysis.
    • Urate homeostasis was believed to depend on a single urate transporter (URAT1).

    Purpose of the Study:

    • To review recent discoveries in urate metabolism.
    • To explore the application of these discoveries in developing novel therapeutics.
    • To address conditions like hyperuricemia, tumor lysis syndrome, and Lesch-Nyhan disease.

    Main Methods:

    • Review of recent scientific literature on urate metabolism.
    • Analysis of genomic and molecular data.

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  • Examination of transporter functions in kidney and intestinal epithelial cells.

    • Main Results:

    • Urate metabolism (uricolysis) requires the sequential action of three enzymes, not one.
    • Gene inactivation in hominoid ancestors led to the loss of urate oxidase.
    • Urate homeostasis is regulated by a complex network of transporters in the kidney and intestine.

    Conclusions:

    • Modern -omics data have reshaped our understanding of urate metabolism and homeostasis.
    • These advancements provide a foundation for developing targeted drugs.
    • Novel therapeutic strategies can be devised for hyperuricemia, tumor lysis syndrome, and Lesch-Nyhan disease.