title: The role of thrombopoietin in post-operative thrombocytosis.
abstract: Thrombopoietin (Tpo), the main regulator of thrombocytopoiesis, is a probable candidate to play a role in the increase in platelet counts that is frequently seen after surgery. In the current study, serial blood samples of patients that underwent major surgery were analysed with respect to Tpo kinetics, platelet turnover and inflammatory cytokines. Platelet Tpo content and plasma Tpo levels rose before platelet counts increased, suggesting that Tpo was indeed responsible for the elevation in platelet counts. In addition, an increase in interleukin 6 (IL-6) levels, but not in IL-11 and tumour necrosis factor alpha levels, was seen before the rise in Tpo concentration. In vitro, IL-6 was shown to enhance Tpo production by the HepG2 liver cell line. Thus, increased Tpo levels after surgery, possibly resulting from enhanced Tpo production under the influence of IL-6 or other inflammatory cytokines, are involved in an enhanced thrombocytopoiesis.
authors.affiliation: Division of Internal Medicine and Department of Haematology, Academic Medical Centre, University of Amsterdam, The Netherlands.
authors.forename: C C
authors.initials: CC
authors.lastname: Folman
authors.forename: M
authors.initials: M
authors.lastname: Ooms
authors.forename: B
authors.initials: B
authors.lastname: Kuenen B
authors.forename: S M
authors.initials: SM
authors.lastname: de Jong
authors.forename: R J
authors.initials: RJ
authors.lastname: Vet
authors.forename: M
authors.initials: M
authors.lastname: de Haas
authors.forename: A E
authors.initials: AE
authors.lastname: von dem Borne
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D019645:Arthroplasty, Replacement, Knee; D001792:Blood Platelets / Q000737:chemistry; D002460:Cell Line; D002478:Cells, Cultured; D001026:Coronary Artery Bypass; D005260:Female; D006801:Humans; D015850:Interleukin-6 / Q000032:analysis* / Q000494:pharmacology; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010976:Platelet Count; D011183:Postoperative Complications / Q000097:blood*; D013922:Thrombocytosis / Q000097:blood*; D013926:Thrombopoietin / Q000032:analysis / Q000097:blood*
chemical_list: D015850:Interleukin-6; D013926:Thrombopoietin