重复经颅磁刺激安全性的初步研究

目的 探讨重复经颅磁刺激的安全性。方法 对接受不同刺激频率和刺激量组经颅磁刺激大鼠的行为、组织病理形态、血清髓鞘碱性蛋白（MBP）及神经元特异性烯醇化酶（NSE）含量进行观察。结果 低频刺激组（5Hz）和高频刺激组（20Hz）在刺激过程中均未出现异常活动,无肢体强直、阵挛等,脑组织形态学包括大体观察、普通光镜改变不明显,其血清MBP和NSE含量与正常对照组比较,无显著性差异（P＞0．05）。结论 在一定强度和频率内经颅磁刺激是比较安全的。     

对基地班学生实施导师制的体会

本总结了2届基地班学生参加生理学科导师组活动的情况,提出几点经验与体会。根据基地班学生的特点和实施导师的制的初衷,运用问题先导法,培养学生的创新意识,加强师生交流,使之成为合格的基础医学人才。     

发皇古义，继承创新——孙桐教授谈中医基础理论的继承与发展

中医基础理论现代化是整个中医药学现代化的基础,其研究方式可以从文献学角度、实验角度、中西医结合角度等多方面展开,当务之急是统一中医理论中一些最基本的概念和术语,用现代精确的科学术语来表述它们,使之规范化、标准化。     

pCD-rbFGF重组质粒的构建及其在成骨细胞中的表达

为了构建碱性成纤维细胞生长因子(basic fibroblast growth factor,bFGF)真核表达质粒,并探讨应用bFGF基因治疗骨科各种疾患的可能性,将鼠碱性成纤维细胞生长因子cDNA克隆至真核表达载体pcDNA3中,构建了重组质粒pCD-rbFGF.通过Liofectin介导将pCD-rbFGF转染兔成骨细胞,经免疫组化检测证实兔成骨细胞获得了bFGF的瞬时表达.提示该bFGF真核表达质粒有效,可用于进一步基因治疗研究.     

神经系统特异性蛋白质在新生儿缺氧缺血性脑病中的诊断价值

目的 评价缺氧缺血性脑病（HIE）新生儿脑脊液（CSF）和血浆中神经元特异性稀醇化酶（NSE）、S-100蛋白（S-100protein,S-100)、髓鞘碱性蛋白（MBP）、肌酸磷酸激酶脑型同工酶（CK-BB）等党课 经系统特异性蛋白质与新生儿HIE程度及预后的关系。方法 新生儿HIE患儿55例,无中枢神经系统疾患的患儿16例作为对照,取CSF和血浆检测上述4种神经系统特异性蛋白质水平。NSE、S-100、MBP用放射免疫试剂盒检测,CK-BB用酶法及琼脂糖电泳法检测,存活出院的患儿定期随访。结果 CSF的NSE、S-100、MBP、CK-BB及血浆NSE、CK-BB均与HIE程度相关,但只有CSF的神经系统特异性蛋白质才能较准确地反映患儿的远期预后,其中敏感性、特异性最高的指标是NSE和S-100。结论 CSF的NSE和S-100是判断HIE患儿脑损伤程度、预测远期预后的可靠指标。     

碱性成纤维细胞生长因子与垂体腺瘤增殖及侵袭能力的关系

利用免疫组织化学方法检测 5 1例人类垂体腺瘤标本的碱性成纤维细胞生长因子 (bFGF)与增殖细胞核抗原 (PCNA)蛋白表达。结果显示 ,在 2 9例 (5 6 9% )垂体腺瘤标本中检测到bFGF呈中等强度以上的阳性表达 ;bFGF表达水平与PCNA标记指数呈正相关 ;在无功能腺瘤中 ,bFGF的表达与肿瘤侵袭性相关 ,但在激素分泌性腺瘤中两者相关性不明显。提示bFGF可能参与了垂体腺瘤的增殖过程及部分腺瘤的侵袭过程。     

Technique for Rapid Hand Transplant Donor Procurement Through the Elbow

Background: Hand and distal forearm allotransplantation has advanced over the last 20 years from experimental to a viable treatment option for bilateral upper extremity amputation. Despite widespread growth of this field, there are few technical reports that elaborate the details of donor arm procurement. This article details a technique for rapid donor procurement through the elbow for mid to distal forearm-level hand allograft procurement. Methods: Nine arm procurements were performed on deceased tissue-only donors provided by the local organ procurement organization, including two bilateral and five unilateral cases. Technique highlights include using a fishmouth incision through the lateral and medical epicondyles, identification of the neurovascular structures, and disarticulating the elbow joint. Results: Procuring through the elbow provides straightforward anatomy, bypasses the need to cut through bone, and allows tissue allotransplantation teams to achieve procurement, flushing, and packaging within 20 minutes. Conclusions: Procurement through the elbow is a simple procedure that streamlines the process for multi-organ donors by minimizing the time needed for hand allograft procurement. Team coordination and surgical rehearsals are essential for successful hand and upper extremity procurement and allotransplantation.     

Comparing 3 Suture Techniques After Muscle Laceration Repair

Background: Skeletal muscle lacerations are a relatively common injury. Compared with nonrepaired lacerations, surgically repaired muscle lacerations regenerate faster, develop less scar tissue, have a higher return to baseline strength, and have lower incidence of hematomas. Despite the benefits of repair, the optimal repair technique is still unknown. The purpose of this study was to examine the biomechanical properties of common muscle repair techniques to determine the optimal repair. Methods: Forty-two fusiform porcine muscle specimens were dissected and used for this study. Three suture techniques were used for comparative analysis: Figure-eight, Mason Allen, and Perimeter. Each muscle was transected and then repaired using one of the 3 techniques. Fourteen muscle-tendon specimens were prepared for each group and tested for tensile failure using a material testing system. Biomechanical properties, including peak failure point and stiffness, were compared for differences between the suture groups by 1-way analysis of variance. The average time per repair technique was also recorded. Results: The Perimeter technique showed a statistically significant higher peak failure point than the Mason Allen technique (P = .03). Both the Figure-eight (P = .047) and Perimeter techniques (P < .001) were significantly stiffer than the Mason Allen technique. The repair time was comparable across all 3 techniques. Conclusions: The Figure-eight and Perimeter repairs were found to be similar in peak failure point and stiffness, whereas the Mason Allen technique showed significantly lower stiffness and peak failure point. The Figure-eight was the quickest repair to perform. The Figure-eight technique may be strongly considered for muscle laceration repairs due to its simplicity and efficiency.     

Impact of donor extracellular vesicle release on recipient cell “cross-dressing” following clinical liver and kidney transplantation

In several murine models of transplantation, the “cross-dressing” of recipient antigen presenting cells (APCs) with intact donor major histocompatibility complex (MHC) derived from allograft-released small extracellular vesicles (sEVs) has been recently described as a key mechanism in eliciting and sustaining alloimmune responses. Investigation of these processes in clinical organ transplantation has, however, been hampered by the lack of sensitivity of conventional instruments and assays. We have employed advanced imaging flow cytometry (iFCM) to explore the kinetics of allograft sEV release and the extent to which donor sEVs might induce cross-dressing following liver and kidney transplantation. We report for the first time that recipient APC cross-dressing can be transiently detected in the circulation shortly after liver, but not kidney, transplantation in association with the release of HLA-bearing allograft-derived sEVs. In liver transplant recipients the majority of circulating cells exhibiting donor HLA are indeed cross-dressed cells and not passenger leukocytes. In keeping with experimental animal data, the downstream functional consequences of the transfer of circulating sEVs harvested from human transplant recipients varies depending on the type of transplant and time posttransplant. sEVs released shortly after liver, but not kidney, transplantation exhibit immunoinhibitory effects that could influence liver allograft immunogenicity.