PMID- 19112916 OWN - NLM STAT- MEDLINE DCOM- 20100408 LR - 20081230 IS - 0253-2727 (Print) IS - 0253-2727 (Linking) VI - 29 IP - 8 DP - 2008 Aug TI - [Experimental study on the effect of sensitized sera on engraftment of hematopoietic stem cells]. PG - 531-4 AB - OBJECTIVE: To evaluate the effect of sensitized sera on engraftment of hematopoietic stem cells (HSCs) and its mechanism. METHODS: Bone marrow cells (BMCs) from C57BL/6 mice were incubated with sensitized sera (group I) or normal sera (group II), and then washed and transplanted into irradiated BALB/c mice. The survival analysis and engraftment evaluation of the recipients were observed. The incubated BMCs were bound with goat anti mouse IgG for and labeled with Annexin V for apoptosis detection. RESULTS: Seven out of ten recipient mice in group I died of bone marrow failure at day 10 after transplantation, while all of those in group II were long-term survived. Engraftment assay showed recipients blood count and BMCs progressively decreased along with time passing in group I; in addition, the chimeric percentage of donor cells progressively decreased as well. The percentage of BMCs binding with goat anti mouse IgG in group I or group II were (90.3 +/- 5.1)% and (5.2 +/- 2.4)%, respectively, and the difference was statistically significant (P < 0.01). However, no significant difference was found in the apoptosis detection between the two groups (P > 0.05). CONCLUSION: The engraftment capacity of HSCs is significantly impaired by sensitized sera, the antibodies in sensitized sera may bind to antigens expressed on HSCs but do not induce apoptosis. FAU - Xu, Lu-Hong AU - Xu LH AD - Hematopoietic Stem Cell Transplantation Center, Department of Pediatrics, The Second Affiliated Hospital, SUN Yat-sen University, Guangzhou 510120, China. FAU - Fang, Jian-Pei AU - Fang JP FAU - Xu, Hong-Gui AU - Xu HG FAU - Weng, Wen-Jun AU - Weng WJ LA - chi PT - English Abstract PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Zhonghua Xue Ye Xue Za Zhi JT - Zhonghua xue ye xue za zhi = Zhonghua xueyexue zazhi JID - 8212398 RN - 0 (Annexin A5) RN - 0 (Immune Sera) SB - IM MH - Animals MH - Annexin A5/metabolism MH - Apoptosis MH - Bone Marrow Cells/metabolism/pathology MH - Cells, Cultured MH - *Hematopoietic Stem Cell Transplantation MH - *Immune Sera MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL EDAT- 2008/12/31 09:00 MHDA- 2010/04/09 06:00 CRDT- 2008/12/31 09:00 PHST- 2008/12/31 09:00 [entrez] PHST- 2008/12/31 09:00 [pubmed] PHST- 2010/04/09 06:00 [medline] PST - ppublish SO - Zhonghua Xue Ye Xue Za Zhi. 2008 Aug;29(8):531-4.