辐照氟银猪皮的实验研究

报道辐照氟银猪皮的制备、实验检测（弹性、创面粘附力和透水性测定，含银量测定）组织学检查细菌检测及抑菌试验研究，结果表明：辐照氟银猪皮除延伸度低于未辐照猪皮外，其撕裂强度、创面粘合力和透水性均与未辐照猪皮相似。组织学检查示：辐照氟银猪皮组织结构完整，表皮细胞部分空泡形成。组织细菌检测证明其无菌生长，达到无菌要求。抑菌试验证明对金黄色葡萄球菌、绿脓杆菌、大肠杆菌、变形杆菌、克雷伯氏菌均有极强的抑菌作用     

休克期大面积切痂对严重烧伤大鼠细胞免疫功能影响的研究

目的 观察休克期大面积切痂对严重烧伤大鼠细胞免疫功能的影响，探索改善烧伤后机体免疫功能紊乱的有效方法。方法 将大鼠分成休克期切痂组（A组）、常规切痂组（B组）和正常对照组（C组）。A、B组造成30％TBSAⅢ度烫伤，C组不烫伤。A组伤后第6h、B组伤后第4d切痂，并于伤后第1、5、9d各活杀10只，取材送检，观察其免疫指标的变化。结果 （1）A、B组与C组比较：A、B组烫伤大鼠各时相点CD3^＋T细胞变化不大（P〉0．05），但CD4^＋T细胞、CD4^＋／CD8^＋比值明显下降、CD8^＋T细胞增高（P〈0．05或P〈0．01）。NK细胞活性明显下降（P〈0．05或P〈0.01），外周血CD25^＋T淋巴细胞表达及经活化后脾脏CD25^＋T淋巴细胞表达明显下降（P〈0．05或P〈0．01）。（2）A组与B组比较：A组CD4^＋T细胞、CD4^＋／CD8^＋比值明显升高、CD8^＋T细胞降低（P〈0．05或P〈0．01），NK细胞活性明显升高（P〈0．05或P〈0．01），外周血CD25^＋T淋巴细胞表达及经活化后脾脏CD25^＋T淋巴细胞表达均明显升高（P〈0．05或P〈0．01）。结论 （1）大鼠烫伤后细胞免疫状况发生了明显变化。（2）休克期切痂可以改善烫伤大鼠T淋巴细胞亚群分布，提高NK细胞活性，增加外周血CD25^＋T淋巴细胞的表达。提高经活化后脾脏CD25^＋T淋巴细胞数。从而改善烫伤大鼠伤后机体的细胞免疫功能。     

烧伤患者血清sIL-2R水平的观察及临床意义

为探讨烧伤患者伤后免疫功能紊乱的可能机制以及烧伤患者病情监测、免疫状况评估的观察指标 ,动态观察了 35例大面积烧伤患者伤后一周、二周、三周及四周血清可溶性白介素 - 2受体 (s IL - 2 R)水平 ,并据烧伤严重程度分中、重、特重度烧伤组进行比较观察。结果发现 :(1)烧伤患者 s IL- 2 R水平明显高于正常对照组 (P<0 .0 1) ,至伤后四周仍无恢复 ;(2 )特重度烧伤患者 s IL- 2 R水平明显高于重度烧伤患者 ,重度烧伤患者 s IL- 2 R水平明显高于中度烧伤患者 (P<0 .0 1)。结论 :升高的 s IL- 2 R是影响烧伤患者免疫功能的众多原因中的重要原因之一 ,伤后 s IL- 2 R水平的观察对烧伤患者病情的监测及免疫状况的评估有一定的临床意义。     

CD3AK细胞对烧伤患者免疫功能的影响

通过检测患者淋巴细胞转化功能及NK细胞活性,调查CD3AK细胞对烧伤患者免疫功能的影响.结果发现:CD3AK细胞使T细胞转化为母细胞能力增加,NK细胞活性升高,表明CD3AK细胞能改善烧伤患者免疫功能低下的状态,促进细胞免疫功能的恢复.     

热休克预处理对严重烫伤大鼠胃黏膜氧自由基的作用

目的:观察热休克预处理对严重烫伤大鼠胃黏膜氧自由基及热休克蛋白(HSP)70表达的影响,探讨氧自由基在大鼠烫伤后急性胃黏膜损伤中的作用及热休克预处理对严重烫伤大鼠胃黏膜的保护作用机制。方法:将96只Wistar大鼠随机分为烫伤组(B组,n=48,其中8只大鼠作为正常对照)及热休克预处理后烫伤组(HB组,n=48,其中8只大鼠作为实验对照),观察各时相点两组大鼠胃黏膜损伤指数(UI)、胃黏膜丙二醛(MDA)及胃黏膜细胞SOD活性变化。应用免疫组化染色分析胃黏膜细胞中HSP 70表达变化。结果:大鼠严重烫伤后胃黏膜细胞SOD大量消耗,MDA显著增加,胃黏膜损害明显;热休克预处理能显著减轻大鼠严重烫伤后急性胃黏膜损害。HB组较B组大鼠胃黏膜HSP 70表达水平显著升高(P<0.05),热休克预处理能显著降低胃黏膜细胞SOD的消耗,减少MDA的产生。胃黏膜损伤指数(UI)与MDA呈显著正相关(r=0.695,P<0.01),与HSP 70呈显著负相关(r=-0.794,P<0.01);胃黏膜SOD与MDA呈显著负相关(r=-0.823,P<0.01),而与HSP 70呈显著正相关(r=0.527,P<0.05)。结论:严重烫伤大鼠胃黏膜存在氧自由基损伤;热休克预处理可显著减轻烫伤大鼠胃黏膜氧自由基损伤,保护机制与HSP 70保护抗氧化酶SOD活性密切相关。     

烧伤患者外周血T淋巴细胞亚群变化动态观察

为探讨烧伤后机体细胞免疫紊乱的机制,动态观察了30例不同烧伤面积患者不同时间的T淋巴细胞亚群变化情况.结果发现:中度烧伤组CD3,CD8伤后变化不大,CD4及CD4/CD8比值至伤后第二周起明显低于正常对照组:重度烧伤组,伤后一周CD3,CD4及CD4/CD8比值即明显降低,至伤后三周CD8明显高于对照组,特重烧伤组,伤后一周即出现CD3,CD4及CD4/CD8比值明显降低,而CD8则明显升高.结论:(1)烧伤后T淋巴细胞亚群的改变是烧伤患者免疫功能低下的原因之一;(2)中度烧伤患者CD/CD8比值下降,主要是由CD4下降所致而重度及特重度烧伤患者CD4/CD8比值下降则是由CD4下降和CD8上升共同作用所致;(3)烧伤面积越大,细胞免疫功能下降越明显,其发生机理越复杂.     

强化精氨酸肠内营养对烧伤患者营养状况和细胞免疫的影响

Objective To investigate the effects of arginine enriched enteral nutrition (EN) on nu-tritional status and cellular immunity of severely burned patients. Methods Randomized, single blind, parallel and positive control investigation was employed in the study. Thirty severely burned patients were di-vided into enteral immune nutrition (EIN) group and EN group. Sixteen patients in EIN group received en-teral nutrition enriched with arginine, while the other 14 patients in EN group received standard enteral nu-trition. Nutritional support was continued for 14 days. Gastrointestinal reaction of patients in 2 groups was observed. Fasting venous blood was drawn from patients of both groups before receiving nutrition treatment and on the morning of 7th, 14th day of treatment. Level of serum protein, hepatic function parameters, renal function parameters, fasting-blood glucose, and subpopulations of T lymphocytes in peripheral blood were determined. Results (1) Incidence of gastrointestinal side effect in EIN group (25.0%) was close to that of EN group (21.4% , P>0.05). (2) Compared with pre-treatment days, levels of prealbumin and transferrin in serum of patients in 2 groups on 7th and 14th post-treatment days were significantly increased (P<0.05 or P<0.01), but there was no significant difference between 2 groups. The level of total serum protein on 14th day of treatment of patients was significantly increased in both groups, and that of EIN group (66±7 g/L)was significantly higher compared with that in EN group (64 ± 11 g/L, P<0.05). The level of serum albumin (29±5, 32±5 g/L, respectively) of patients in EIN group on 7th and 14th day of treat-ment were significantly higher than that (26±4 g/L, P <0.05) in pre-treatment days, however there was no significant difference in EN group. (3) There was no significant difference in respect of hepatic function, renal function, and fasting-blood glucose between pre-treatment and post-treatment periods in both groups (P>0.05). (4) The ratio of CD4+ , CD8+ on 14th day of treatment in EIN group was close to that of pre-treatment level. In EN group, cell percentage of CD4+ significantly decreased, while that of CD8+ significantly increased (P<0.05), and CD4+ was significantly higher [(56±8) %] in EIN group than that in EN group [(55±12) % , P <0.05]. In both groups, cell percentage of CD3+ was significantly higher than that in pre-treatment days (P<0.05), while there was no obvious change in CD4+/CD8+. Conclusions Arginine enriched enteral nutrition can effectively improve nutritional status and cellular immune function of burn patients.     

强化精氨酸肠内营养对烧伤患者营养状况和细胞免疫的影响

Objective To investigate the effects of arginine enriched enteral nutrition (EN) on nu-tritional status and cellular immunity of severely burned patients. Methods Randomized, single blind, parallel and positive control investigation was employed in the study. Thirty severely burned patients were di-vided into enteral immune nutrition (EIN) group and EN group. Sixteen patients in EIN group received en-teral nutrition enriched with arginine, while the other 14 patients in EN group received standard enteral nu-trition. Nutritional support was continued for 14 days. Gastrointestinal reaction of patients in 2 groups was observed. Fasting venous blood was drawn from patients of both groups before receiving nutrition treatment and on the morning of 7th, 14th day of treatment. Level of serum protein, hepatic function parameters, renal function parameters, fasting-blood glucose, and subpopulations of T lymphocytes in peripheral blood were determined. Results (1) Incidence of gastrointestinal side effect in EIN group (25.0%) was close to that of EN group (21.4% , P>0.05). (2) Compared with pre-treatment days, levels of prealbumin and transferrin in serum of patients in 2 groups on 7th and 14th post-treatment days were significantly increased (P<0.05 or P<0.01), but there was no significant difference between 2 groups. The level of total serum protein on 14th day of treatment of patients was significantly increased in both groups, and that of EIN group (66±7 g/L)was significantly higher compared with that in EN group (64 ± 11 g/L, P<0.05). The level of serum albumin (29±5, 32±5 g/L, respectively) of patients in EIN group on 7th and 14th day of treat-ment were significantly higher than that (26±4 g/L, P <0.05) in pre-treatment days, however there was no significant difference in EN group. (3) There was no significant difference in respect of hepatic function, renal function, and fasting-blood glucose between pre-treatment and post-treatment periods in both groups (P>0.05). (4) The ratio of CD4+ , CD8+ on 14th day of treatment in EIN group was close to that of pre-treatment level. In EN group, cell percentage of CD4+ significantly decreased, while that of CD8+ significantly increased (P<0.05), and CD4+ was significantly higher [(56±8) %] in EIN group than that in EN group [(55±12) % , P <0.05]. In both groups, cell percentage of CD3+ was significantly higher than that in pre-treatment days (P<0.05), while there was no obvious change in CD4+/CD8+. Conclusions Arginine enriched enteral nutrition can effectively improve nutritional status and cellular immune function of burn patients.     

早期药膳饮食对烫伤大鼠肠黏膜Peyer’s结T淋巴细胞及亚群的影响

背景：肠相关淋巴组织的组成部分Peyer’s 结是肠黏膜免疫系统的重要诱导部位,含有参与免疫应答的各种免疫细胞,如CD4 +T 细胞、CD8 +T细胞、B细胞等。 目的：观察早期药膳饮食对烫伤大鼠肠道肠黏膜Peyer’s结T淋巴细胞及其亚群的影响。 设计、时间及地点：随机对照动物实验,于2006-04/2007-03在南昌大学一附属医院完成。 材料：Wistar大鼠100只,随机分成药膳喂养组(n=30)、肉汤喂养组(n=30)、常规喂养组(n=30)、正常对照组(n=10)。药膳成分：党参20 g、白术25 g、茯苓25 g、炙甘草15 g、黄芪20 g、薏苡仁20 g、瘦猪肉200 g。 方法：药膳喂养组、肉汤喂养组、常规喂养组实施背部30%体表面积Ⅲ度烫伤,伤后早期分别给予药膳、肉汤和生理盐水,2 mL/次,2次/d。正常对照组实施37 ℃假伤。 主要观察指标：伤后3,7,14 d检测大鼠肠黏膜Peyer’s结T淋巴细胞及亚群。 结果：伤后3,7 d,药膳喂养组、肉汤喂养组、常规喂养组Peyer’s结淋巴细胞总数、CD3+淋巴细胞的百分比及总数、CD4+百分比及总数、CD8+细胞的百分比及总数较正常对照组明显减少 (P < 0.05,P < 0.01),至14 d,药膳喂养组与正常对照组相比差异不显著。伤后3,7,14 d药膳喂养组CD3+淋巴细胞的百分比及总数、CD4+百分比及总数较肉汤喂养组、常规喂养组明显升高(P < 0.05)。伤后3,7 d药膳喂养组Peyer’s结CD8+细胞的百分比及总数较肉汤喂养组、常规喂养组明显下降(P < 0.05)。 结论：早期药膳饮食有利于肠道Peyer’s结淋巴细胞的增生,并改善Peyer’s结T淋巴细胞亚群的比例,从而改善烫伤大鼠肠道免疫功能。     

休克期大面积切痂对严重烫伤大鼠淋巴细胞亚群的影响

感染是大面积烧伤患常见的并发症之一，其发生、发展及结局与机体的免疫状态密切相关。因此，严重烧伤后机体的免疫问题备受关注，许多学在这方面做了大量的研究，但其确切的发生机制尚不清楚。为探讨烧伤后早期创面处理与机体免疫功能的关系，笔观察了休克期切痂对烫伤大鼠淋巴细胞亚群的影响。