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Bone marrow cells produce nerve growth factor and promote angiogenesis around transplanted islets

World Journal of Gastroenterology 2010年第10期16卷 1215-1220页

作者： Naoaki Sakata Nathaniel K Chan john chrisler Andre Obenaus Eba Hathout Islet Transplant Laboratory Department of PediatricsLoma Linda University School of Medicine Division of Hepato-Biliary Pancreatic Surgery Department of SurgeryTohoku University Graduate School of Medicine Departments of Radiation Medicine and Radiology Loma Linda University School of Medicine

AIM:To clarify the mechanism by which bone marrow cells promote angiogenesis around transplanted ***: Streptozotocin induced diabetic BALB/ c mice were transplanted syngeneically under the kidney capsule with the following: (1) 200 islets (islet group: n=12), (2) 1-5×106 bone marrow cells (bone marrow group: n=11), (3) 200 islets and 1-5×106 bone marrow cells (islet + bone marrow group: n= 13), or (4) no cells (sham group:n=5). All mice were evaluated for blood glucose, serum insulin, serum nervegrowth factor (NGF) and glucose tolerance (GTT) up to postoperative day (POD) 14. Histological assessment for insulin, von Willebrand factor (vWF) and NGF was performed at POD 3, 7 and ***: Blood glucose level was lowest and serum insulin was highest in the islet + bone marrow group. Serum NGF increased in islet, bone marrow, and islet + bone marrow groups after transplantation, and there was a significant difference (P=0.0496, ANOVA) between the bone marrow and sham groups. The number of vessels within the graft area was signif icantly increased in both the bone marrow and islet + bone marrow groups at POD 14 as compared to the islet alone group (21.2 ± 3.6 in bone marrow, P=0.01, vs islet group, 22.6 ± 1.9 in islet + bone marrow, P = 0.0003, vs islet group, 5.3 ± 1.6 in islet-alone transplants). NGF was more strongly expressed in bone marrow cells compared with islets. CONCLUSION: Bone marrow cells produce NGF and promote angiogenesis. Islet co-transplantation with bone marrow is associated with improvement of islet graft function.

关键词： Islet transplantation Bone marrow cells Nerve growth factor Angiogenesis Endothelial precursor cells

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