{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T04:10:05Z","timestamp":1790482205853,"version":"4.1.0"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2006,7,17]],"date-time":"2006-07-17T00:00:00Z","timestamp":1153094400000},"content-version":"vor","delay-in-days":8219,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl Journal of Cancer"],"published-print":{"date-parts":[[1984,1,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>An improved method for the detection of deoxythymidine kinase (TK) in human sera is reported. The method which utilizes <jats:sup>125<\/jats:sup>I\u2010iododeoxyuridine (IdUrd) as a substrate was used to measure TK in sera from patients with different diseases. Sera collected during the acute stage of infectious mononucleosis were found to contain elevated levels of TK, in most cases 10\u201340 times the normal value. The serum TK activity disappeared gradually and reached a normal level within 4 weeks. Sera from patients with other viral infections contained in most cases normal serum TK levels except in connection with measles, rubella, varicella, herpes simplex virus and cytomegalovirus infections. Additional studies revealed that sera from patients with different types of advanced lymphomas, acute leukemias, chronic granulocytic leukemia and lung cancer of the small\u2010cell type with metastases, contained high TK level which fluctuated in parallel with alterations in activity of the disease. The TK activity in sera from patients with both mononucleosis and tumor disease was characterized by electrophoresis and by its ability to utilize cytidine triphosphate as the phosphate donor. The results showed that the serum TK has the same properties as the human cytosolar TK1, except in connection with varicella.<\/jats:p>","DOI":"10.1002\/ijc.2910330103","type":"journal-article","created":{"date-parts":[[2007,2,19]],"date-time":"2007-02-19T19:23:53Z","timestamp":1171913033000},"page":"5-12","source":"Crossref","is-referenced-by-count":106,"title":["Application of an <i>in vitro<\/i> assay for serum thymidine kinase: Results on viral disease and malignancies in humans"],"prefix":"10.1002","volume":"33","author":[{"given":"J. Simon","family":"Gronowitz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clas F. 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