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Effects of NGF and TrkA on GAP-43^+ nerve regeneration in rat autotransplanted splenic tissue 被引量:1

Effects of NGF and TrkA on GAP-43^+ nerve regeneration in rat autotransplanted splenic tissue
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摘要 Objective:To study the time-course of the regeneration of GAP-43+ nerve, and the effects of NGF and TrkA on this process. Methods: Adult Wistar rats underwent splenectomy and splenic autotransplantation, or sham-operation. On day 7, 14, 30, 60, 90, 120, and 180 after surgery, the density of GAP-43+ nerve fibers in spleen tissues were measured with the immunohistochemistry followed by computer image analysis. The expressions of GAP-43, NGF and TrkA were determined with in situ hybrdization, and their mRNA levels were detected with RT-PCR and image analysis qualification. Results: (1) The GAP-43+ nerve fibers began their regeneration on 30 d after operation and extended from greater omentum into splenic autotransplants. Density of the nerve fibers gradually became greater and almost normal 180 d after operation. (2) In splenic autografts, the mRNA expression of GAP-43, NGF and TrkA appeared on day 30 after the operation, gradually reached the peak on day 90. Conclusion: The renascent GAP-43+ nerve fibers may come from the greater omentum packaging the splenic autografts and NGF and TrkA can promote the nerval regeneration in the autotransplant spleen tissues. Objective:To study the time-course of the regeneration of GAP-43^+ nerve, and the effects of NGF and TrkA on this process. Methods: Adult Wistar rats underwent splenectomy and splenic autotransplantation, or sham-operation. On day 7, 14, 30, 60, 90, 120, and 180 after surgery, the density of GAP-43^+ nerve fibers in spleen tissues were measured with the immunohistochemistry followed by computer image analysis. The expressions of GAP-43, NGF and TrkA were determined with in situ hybrdization, and their mRNA levels were detected with RT-PCR and image analysis qualification. Results: (1) The GAP-43^+ nerve fibers began their regeneration on 30 d after operation and extended from greater omentum into splenic autotransplants. Density of the nerve fibers gradually became greater and almost normal 180 d after operation. (2) In splenic autografts, the mRNA expression of GAP-43, NGF and TrkA appeared on day 30 after the operation, gradually reached the peak on day 90. Conclusion: The renascent GAP-43^+ nerve fibers may come from the greater omentum packaging the splenic autografts and NGF and TrkA can promote the nerval regeneration in the autotransplant spleen tissues.
出处 《Journal of Medical Colleges of PLA(China)》 CAS 2005年第6期351-355,共5页 中国人民解放军军医大学学报(英文版)
关键词 REGENERATION NERVE splenic autografts adult rats NGF TrkA GAP-43^+ 神经再生 脾移植 自体移植
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