Effects of anticoagulants on human plasma soluble corin levels measured by ELISA |
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| Authors: | Ningzheng Dong Jing Dong Peng Liu Luyao Xu Sengseng Shi Qingyu Wu |
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| Institution: | 1. Genetics Program, Michigan State University, East Lansing, MI 48824, United States;2. Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, United States;3. Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States;1. Department of Anesthesiology, The Third Central Hospital of Tianjin, Tianjin, China;2. Tianjin Key Laboratory of Artificial Cell, Tianjin 300170, China;3. Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China;4. Pain Management Center, The Second Hospital of Tianjin Medical University, Tianjin 300203, China;5. Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou 221002, China |
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| Abstract: | BackgroundRecently, soluble corin was detected in human plasma. In patients with heart failure, plasma corin levels were lower than that of normal controls. In this study, we analyzed experimental conditions for measuring plasma or serum corin by an immunoassay.MethodsSerum and plasma corin levels were measured by ELISA. Effects of different anticoagulants (EDTA, heparin and sodium citrate) on plasma corin levels were examined.ResultsCorin levels in serum were similar to that in plasma with heparin (950 ± 305 vs. 929 ± 301 pg/ml, n = 40, p = 0.73), but were significantly higher than those in plasma with sodium citrate (735 ± 237 pg/ml, p < 0.01) or EDTA (716 ± 261 pg/ml, p < 0.001). Native and recombinant human corin proteins were stable in human plasma with EDTA at 4 °C or underwent freezing-and-thawing. In 348 healthy Chinese individuals, plasma corin levels ranged from 216 to 1663 pg/ml. The levels were higher in males than that in females (842 ± 283 vs. 569 ± 192 pg/ml, p < 0.001).ConclusionSoluble corin was stable in plasma samples. Plasma soluble corin levels vary depending on anticoagulants used. Samples containing heparin had significantly higher levels of corin than that in samples with EDTA or sodium citrate. |
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