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Change in serum proteome during allogeneic hematopoietic stem cell transplantation and clinical significance of serum C-reactive protein and haptoglobin
Authors:Joohyun Ryu  Se Ryeon Lee  Sung Goo Park  Sunghyun Kang  Hyeoung-Joon Kim  and Byoung Chul Park
Institution:1.Medical Proteomics Research Center, KRIBB, Daejeon 305-333, Korea.;2.Division of Hematology and Oncology, Department of Internal Medicine, Korea University Medical Center, Seoul 136-713, Korea.;3.Blood and Marrow Transplant Center, Chonnam National University Hwasun Hospital, Hwasun 519-809, Korea.;4.Genome Research Center for Hematopoietic Disease, Chonnam National University Hwasun Hospital, Hwasun 519-809, Korea.;5.Department of Biology, Kongju National University, Gongju 314-701, Korea.
Abstract:Successful hematopoietic stem cell transplantation (HSCT) involves the restoration of hematopoietic function after engraftment, arising from the differentiation and proliferation of hematopoietic stem cells. Several factors could influence the course of allogeneic-HSCT (allo-HSCT). Therefore, knowledge of serum proteome changes during the allo-HSCT period might increase the efficacy of diagnosis and disease prevention efforts. This study conducted proteomic analyses to find proteins that were significantly altered in response to allo-HSCT. Sera from five representative patients who underwent allo-HSCT were analyzed by 2-dimensional gel electrophoresis and liquid chromatography tandem mass spectrometry, and were measured on a weekly basis before and after allo-HSCT in additional 78 patients. Fourteen protein spots showing changes in expression were further examined, and most proteins were identified as acute phase proteins (APPs). Studies of 78 additional patients confirmed that C-reactive protein (CRP) and haptoglobin undergo expression changes during allo-HSCT and thus may have the potential to serve as representative markers of clinical events after allo-HSCT. Maximal CRP level affected the development of major transplant-related complications (MTCs) and other problems such as fever of unknown origin. Particularly, an increase in CRP level 21 days after allo-HSCT was found to be an independent risk factor for MTC. Maximal haptoglobin and haptoglobin level 14 days after allo-HSCT were predictive of relapses in underlying hematologic disease. Our results indicated that CRP and haptoglobin were significantly expressed during allo-HSCT, and suggest that their level can be monitored after allo-HSCT to assess the risks of early transplant-related complications and relapse.
Keywords:biological markers  C-reactive protein  haptoglobin  hematopoietic stem cell transplantation  proteomics  recurrence
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