哮喘儿童外周血T细胞亚群水平表达

目的探讨哮喘儿童外周血T细胞亚群表达极其在发病机制中的作用。方法10例健康儿童为对照组,15例确诊支气管哮喘的儿童为实验组。采用流式细胞术检测CD3^＋、CD4^＋、CD8^＋T细胞百分数。结果实验组与对照组比较,经检验各组（P〉0．05）,差异无显著性。结论哮喘发作1～3d内的患儿外周血中T细胞亚群水平表达与正常儿童无差异。     

全胃多发类癌一例

1 临床资料 患者女,46岁。因进食后腹胀小适1年余,期间无腹痛、恶心、呕吐、反酸、暖气、呕血、黑便等症状,于当地乡镇卫生院就诊,行上消化道钡餐造影检查,诊断为慢性萎缩性胃炎,给予促胃肠动力、抑酸、保护胃黏膜等保守治疗后症状缓解。此后反复发作腹胀不适,为求进一步诊断与治疗患者于2012年8月28日来我院普通外科就诊。患者自述慢性萎缩性胃炎病史10余年、体格检查：胸部和腹部均无阳性体征。     

A comparison of biomechanical changes on femoral head following rotational acetabular osteotomy and eccentric rotational acetabular osteotomy in normal cadaveric hip

Purpose

Both rotational acetabular osteotomy (RAO) and eccentric rotational acetabular osteotomy (ERAO) are effective procedures for young patients with developmental dysplasia of the hip. However, no comparative study of biomechanical changes has been reported following these two procedures. We therefore explored the stress changes on femoral head after RAO and ERAO under different load conditions.

Materials and methods

Twelve female cadaveric hips without deformity were divided into RAO group and ERAO group. Stress value on femoral head was measured preoperatively and postoperatively after the vertical force was loaded on the cadaveric spine from 0 to 500 N. Stress change value was then calculated base on the measurements.

Results

In the RAO group, preoperative stress increased when loading on spine became larger, but postoperative stress changed its increasing trend into decreasing when the load was greater than 200 N (turning point). Same phenomenon was found in the ERAO group (turning point was 300 N). However, the difference between preoperative and postoperative stress was not statistically significant in both RAO and ERAO groups. Stress change value from each procedure showed similar trends. With the load growth, stress change increased firstly and then decreased, but the difference between RAO and ERAO was not statistically significant.

Conclusions

Both RAO and ERAO could correct the abnormal biomechanical effect of dysplastic hip; moreover, they may have similar biomechanical effects on femoral head, obtaining the same clinical outcomes. Non-biomechanical factors (surgical trauma, technical complexity, etc.) also play important roles in procedure selection.     

胶原-壳聚糖复合材料的制备及生物安全性检测

目的:制备胶原-壳聚糖复合细胞载体,并对该载体进行系统的生物学性能检测。方法:实验于2003-07/2006-06在天津市医药科学研究所完成。将胶原溶液和壳聚糖溶液按照一定比例(9∶1)混匀,交联后真空冷冻干燥,制成胶原-壳聚糖复合载体,对该载体进行复合材料性状及理化性能检测。并采用急性全身毒性试验、皮内刺激试验、皮肤致敏试验、溶血试验、细胞毒性试验和致突变试验进行生物学性能检测。结果:①胶原-壳聚糖复合材料具有三维立体多孔结构,适合细胞的三维生长,能为新生组织提供良好的支架。②急性全身毒性试验、皮内刺激试验均阴性,致敏率仅为6.25%,细胞毒性为0级,无诱变能力。结论:从仿生学角度出发,制备出可生物降解的胶原-壳聚糖复合材料,经过系统的生物学评价发现,胶原-壳聚糖复合材料具有良好的生物安全性,对机体无毒,不致突变,对细胞有较强的亲和作用,利于细胞生长和分化。     

维生素C和芦丁对力竭运动小鼠组织自由基代谢的影响

目的:观察注射维生素C和芦丁后,急性疲劳性游泳运动小鼠机体各组织自由基代谢的变化情况。方法:实验于2004-09/12在泰山医学院基础医学研究所完成,选择雄性小鼠32只,随机分为4组,分别为生理盐水组、芦丁组、维生素C组和维生素C+芦丁组,每组8只。生理盐水组每天注射等量生理盐水,芦丁组注射芦丁5mg/d,维生素C组注射维生素C8mg/d,维生素C+芦丁组每天注射芦丁5mg和维生素C8mg,持续15d。各组小鼠进行池中游泳至力竭,力竭标准:动物不能在水中保持上浮,开始下沉,取出后尾部受刺激逃避呈踉跄步态,身体不能保持平衡,但呼吸心跳存在。麻醉后断头处死,测定小鼠脑、心、肝、肾和骨骼肌中丙二醛含量和超氧化物歧化酶活性分别采用硫代巴比妥酸比色法和氮蓝四唑光还原法。结果:所有小鼠全部进入结果分析,无脱失。①各组小鼠运动耐力比较:芦丁组、维生素C组及维生素C+芦丁组小鼠的耐力时间显著长于生理盐水组[(52.51±8.97,50.50±7.23和60.15±9.54,42.10±6.32)min(χ2=18.48～19.11,P<0.01)]。②各组小鼠各组织丙二醛/超氧化物歧化酶比值比较:芦丁组、维生素C组和维生素C+芦丁组小鼠心、肾、肝和肌组织中比值均显著低于生理盐水组(χ2=14.20～16.00,P<0.05),但维生素C+芦丁组的比值显著低于芦丁组和维生素C组(χ2=18.50～20.13,P<0.01)。结论:维生素C和芦丁均可降低丙二醛/超氧化物歧化酶比值,减少力竭运动后因脂质过氧化而产生的自由基,延长机体过度运动的耐力,但两者混合使用效果更好。     

Cell-Specific Imd-NF-κB Responses Enable Simultaneous Antibacterial Immunity and Intestinal Epithelial Cell Shedding upon Bacterial Infection

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Effect of Antithymocyte Globulin Source on Outcomes of HLA-Matched Sibling Allogeneic Hematopoietic Stem Cell Transplantation for Patients with Severe Aplastic Anemia

We wanted to evaluate efficacy of porcine antithymocyte globulin (ATG) in HLA-matched sibling donor allogeneic hematopoietic stem cell transplantation (MSD-HSCT) for patients with severe aplastic anemia (SAA). The clinical data of 113 SAA patients who received MSD-HSCT from January 2005 to November 2016 were analyzed retrospectively. Of these, 58 patients received rabbit ATG as a part of conditioning regimen (R-ATG group), whereas the other 55 patients received porcine ATG (P-ATG group). Patient baseline characteristics and donor conditions of the 2 groups were similar, except patients were older and more received peripheral blood stem cell transplantation in the P-ATG group. All patients engrafted in 2 groups. There were significant differences in the incidence of acute (20.7%?±?5.3% versus 43.4%?±?7.0%, P?=?.015) and chronic graft-versus- host disease (GVHD; 20.1%?±?5.8% versus 46.0%?±?7.9%, P?=?.003) between the R-ATG and P-ATG groups. However, there were no significant differences in terms of 3-year overall survival (93.1%?±?3.3% versus 84.4%?±?5.7%, P?=?.235), grades III to IV acute GVHD (3.4%?±?2.4% versus 12.3%?±?4.7%, P?=?.098), moderate to severe chronic GVHD (12.6%?±?4.9% versus 11.5%?±?4.9%, P?=?.905), or graft rejection (7.4%?±?3.6% versus 5.5%?±?3.1%, P?=?.852). There was also no significant difference with regard to the incidence of severe bacterial infection (P?=?.075), invasive fungal disease (P?=?.701), or cytomeglovirus viremia (P?=?.770). P-ATG showed satisfactory efficacy and safety compared with R-ATG in the setting of MSD-HSCT for SAA patients. P-ATG could be a potential alternative preparation for R-ATG, further offering the advantage of lower costs.