{"id":5928,"date":"2026-08-04T10:46:16","date_gmt":"2026-08-04T03:46:16","guid":{"rendered":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/?p=5928"},"modified":"2026-08-04T10:50:05","modified_gmt":"2026-08-04T03:50:05","slug":"predicting-lupus-membranous-nephritis-using-reduced-picolinic-acid-to-tryptophan-ratio-as-a-urinary-biomarker","status":"publish","type":"post","link":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/predicting-lupus-membranous-nephritis-using-reduced-picolinic-acid-to-tryptophan-ratio-as-a-urinary-biomarker\/","title":{"rendered":"Predicting lupus membranous nephritis using reduced picolinic acid to tryptophan ratio as a urinary biomarker"},"content":{"rendered":"<p>Krittima Anekthanakul, Siriphan Manocheewa, Kittiphan Chienwichai, Patcha Poungsombat, Suphitcha Limjiasahapong, Kwanjeera Wanichthanarak, Narumol Jariyasopit, Vivek Bhakta Mathema, Chutima Kuhakarn, Vichai Reutrakul, Jutarop Phetcharaburanin, Atikorn Panya, Natthaporn Phonsatta, <strong>Wonnop Visessanguan<\/strong>, Yotsawat Pomyen, Yongyut Sirivatanauksorn, Suchin Worawichawong, Nuankanya Sathirapongsasuti, Chagriya Kitiyakara, <strong>Sakda Khoomrung<\/strong><\/p>\n<h2 class=\"title\">Abstract<\/h2>\n<div id=\"eng-abstract\" class=\"abstract-content selected\">\n<div class=\"title\">\n<p>The current gold standard for classifying lupus nephritis (LN) progression is a renal biopsy, which is an invasive procedure. Undergoing a series of biopsies for monitoring disease progression and treatments is unlikely suitable for patients with LN. Thus, there is an urgent need for non-invasive alternative biomarkers that can facilitate LN class diagnosis. Such biomarkers will be very useful in guiding intervention strategies to mitigate or treat patients with LN. Urine samples were collected from two independent cohorts. Patients with LN were classified into proliferative (class III\/IV) and membranous (class V) by kidney histopathology. Metabolomics was performed to identify potential metabolites, which could be specific for the classification of membranous LN. The ratio of picolinic acid (Pic) to tryptophan (Trp) ([Pic\/Trp] ratio) was found to be a promising candidate for LN diagnostic and membranous classification. It has high potential as an alternative biomarker for the non-invasive diagnosis of LN.<\/p>\n<p><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/34805802\/\">https:\/\/pubmed.ncbi.nlm.nih.gov\/34805802\/<\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Krittima Anekthanakul, Siriphan Manocheewa, Kittiphan C [&#8230;]\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-5928","post","type-post","status-publish","format-standard","hentry","category-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Predicting lupus membranous nephritis using reduced picolinic acid to tryptophan ratio as a urinary biomarker - \u0e20\u0e32\u0e04\u0e27\u0e34\u0e0a\u0e32\u0e0a\u0e35\u0e27\u0e40\u0e04\u0e21\u0e35 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