Determination of time-dependent accumulation of d-lactate in the streptozotocin-induced diabetic rat kidney by column-switching HPLC with fluorescence detection

Mei Hsiang Lin, Hsiang Yin Chen, Tzu Hsin Liao, Tzu Chuan Huang, Chien Ming Chen, Jen Ai Lee

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17 Citations (Scopus)

Abstract

For better understanding the complete metabolism and the physiological role of d-lactate, the concentrations of d-lactate in the serum, liver and kidney of normal and diabetic rats were determined by our established column-switching HPLC method with pre-column fluorescence derivatization. Eight-week-old male Sprague-Dawley rats were administered with streptozotocin (STZ) (80. mg/kg) or citrate buffer intraperitoneally. The tissues were then removed and homogenized after 4, 8, 12 and 16. weeks of drug administration, respectively. The homogenates were centrifuged at 1200 × g for 10. min, then the supernatants were derivatized with a fluorescent reagent, 4-nitro-7-piperazino-2,1,3-benzoxadiazole (NBD-PZ), separated on an ODS column followed by a Chiralpak AD-RH chiral column for enantioseparation. The results showed that the d-lactate content elevated in all the 3 examined tissues under diabetic stages. In addition, d-lactate concentrations in rat kidney were accumulated significantly and time-dependently in diabetic groups after receiving STZ for 4, 8, 12 and 16. weeks (2.99, 13.11, 18.19, 23.23 vs. 0.79 μmol/mg protein as control group). Moreover, the kidney of induced 12-week diabetic rat renal showed some histological changes of progressive diabetic nephropathy. The results suggest that d-lactate may be used as a marker of diabetic nephropathy.

Original languageEnglish
Pages (from-to)3214-3219
Number of pages6
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume879
Issue number29
DOIs
Publication statusPublished - Nov 1 2011

Keywords

  • D-Lactate
  • Diabetic rat
  • L-Lactate
  • Methylglyoxal
  • Nephropathy
  • Streptozotocin

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Cell Biology
  • Clinical Biochemistry

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