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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Seung-Ho (Department of Biochemistry & Molecular Biology, Korea University) Kim, Ki-Nam (Department of Biochemistry & Molecular Biology, Korea University) Seo, Sang-Hui (Department of Biochemistry & Molecular Biology, Korea University) Sohn, Sung-Hwa (Department of Biochemistry & Molecular Biology, Korea University) Kim, Yu-Ri (Department of Biochemistry & Molecular Biology, Korea University) Kim, Hye-Won (Department of Biochemistry & Molecular Biology, Korea University) Choi, Chul-Won (Department of Internal Medicine, College of Medicine, Korea University) Kim, Jun-Suk (Department of Internal Medicine, College of Medicine, Korea University) Kim, Meyoung-Kon (Department of Biochemistry & Molecular Biology, Korea University)
저널정보
대한독성유전단백체학회 Molecular & cellular toxicology Molecular & cellular toxicology 제2권 제1호
발행연도
2006.1
수록면
67 - 73 (7page)

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In previous studies, it has been discovered that cancer cells not only overexpress regulatory subunit I (Rl)/protein kinase type I (PKA-I) but also secrete outside the cell an extracellular form of PKA (ECPKA) and that the ECPKA secretion detected in patients' serum is obviously greater than that found in non-cancer patients or healthy subjects. We now found that ECPKA elicits the formation of serum autoantibodies that can serve as a cancer diagnostic and prognostic marker. To measure the presence of anti-ECPKA autoantibody in the human sera, basic methodology for ECPKA assay was established an enzyme-linked immunosorbent assay (ELISA). We obtained serum samples from 199 patients with different types of cancer, and also obtained 31 serum samples to compare with ECPKA concentrations from non-cancer patients and 119 normal volunteers. Compared with normal or non-cancer patient sera, we found that the frequency of anti-ECPKA autoantibody was significantly higher in cancer patients (88%) than in those without cancer (17%). Furthermore the presence of anti-ECPKA autoantibodies in the serum of cancer patients was highly correlated with the site of metastasis. The immunoassay developed for anti-ECPKA antibodies is highly sensitive and specific. Therefore, this discovery of an autoantibody-based cancer diagnostic may have serious clinical application and may become an important advance over current technology.

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