Designing a diagnostic kit for Oxalyl CoA Decarboxylase enzyme by ELISA method

•Urinary stones are the third most commonly reported urinary tract disease.•Oxalic acid is highly oxidized organic compounds, which found in dietary and produced the intestinal microflora.•In this study, the Oxalyl CoA decarboxylase gene contains an-histidin tag was cloned in pET28a (+) and expressed in Escherichia coli BL21 (DE3).•The antibody against Oxalyl CoA decarboxylase protein was used in ELISA assay.•This study suggests that antibody against Oxalyl-CoA decarboxylase protein is useful to measure oxalyl CoA decarboxylase enzymes in patients. Urinary stones are the third most commonly reported urinary tract disease. Kidney stones are one of the most common types of urinary stones that most of them (70–80%) are calcium oxalate. Oxalic acid is highly oxidized organic compounds, which found in dietary and produced by the intestinal microflora. Oxalyl CoA decarboxylase is a key enzyme and plays an important role in oxalate degradation. In this study, the Oxalyl CoA decarboxylase gene which contains an –histidine tag was cloned in pET 28a (+) and expressed in Escherichia coli BL21 (DE3). The purified Oxalyl CoA decarboxylase protein was injected into rabbit for immunization. The antibody against Oxalyl CoA decarboxylase protein was used in ELISA assy. eventually, this ELISA system was used for patients with calcium oxalate kidney stones. ELISA analysis of serum samples of patient white calcium oxalate kidney stones showed that 88.8% of patient was lacking in antibody against Oxalyl CoA decarboxylase. This study suggests that antibodies against oxalyl-co-decoxylase proteins are useful in the detection of urinary tract stones and It can be used to measure oxalyl CoAdecoxylase enzymes in a simple method.