首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 546 毫秒
1.
  相似文献   

2.
Objective: To explore the effects of cytomegalovirus (CMV) infection on rejection-related gene expression in the endothelial cells of renal transplantation recipients. Methods: Endothelial cells (ECs) were cultured and stimulated by a variety of factors: A, normal control group; B, inactivated human cytomegalovirus (HCMV) infection group; C, HCMV infection group; D, HCMV supematant infection group; and E, ganciclovir HCMV group. Expression of intercellular adhesion molecule-1 (ICAM-1) and major histocompability complex (MHC) class Ⅰ and class Ⅱ antigens was detected by flow cytometry (FCM) and immuno-histochemistry. Results: We found characteristic CMV-infected ECs in this study. There were no significant differences among groups A, B and D (P>0.05). Although the expression levels of ICAM-1 were not significantly different between groups C and E (P>0.05), the ICAM-1 expression in these two groups was significantly higher than that in group A (P<0.05). ICAM-1 expression was detected in groups C and E, while there was no expression in groups A, B and D. Furthermore, there was no significant difference of ICAM-1 mRNA expression between groups C and E (P>0.05). Human leucocyte antigen (HLA)-ABC expression was detected in all the groups, while HLA-DR expression was only detected in groups C and E. There were no significant dif-ferences of HLA-ABC and HLA-DR expression among groups A, B and D (P>0.05). However, the HLA-ABC and HLA-DR expression levels in groups C and D were higher than those of the remaining groups previously reported (P<0.05). Meanwhile, the HLA-ABC and HLA-DR expression levels in group E were lower than those of group C (P<0.05). Conclusion: CMV could up-regulate the expression levels of ICAM-1 and MHC antigens, which was closely related to allograft rejection.  相似文献   

3.
Use and effects of liver specific antigen in orthotopic liver transplantations were researched in this study. Group I: syngeneic control (Wistar-to-Wistar); Group II: acute rejection (SD-to-Wistar); Group III: Thymic inoculation of SD rat LSA day 7 before transplantation. The observation of common situation and survival time, rejection grades, NF-κB activity of splenocytes and IL-2mRNA expression of grafted liver were used to analyze acute rejection severity and immune state of animals in different groups. The common situation of group I was very well after transplantation and no signs of rejection were found. Recipients of group II lost body weight progressively All dead within day 9 to day 13 posttransplantation; median survival time was 10.7 ±0.51 days. It was an optimal acute rejection control. As for group III, 5 out of 6 recipients survived for a long time and common situation was remarkably better than that of group II. Its rejection grades were significantly lower than that of group II(P<0.05). NF-κB activity was only detected in group I at day 5 and day 7 after transplantation, whereas high activity of NF-κB was detected at all time points in groupII and the low NF-κB activity detected in group III was significantly lower than that of group II (P<0.05). No IL-2mRNA expression was detected at any time point in group I, whereas high level expression was detected at all time points in group II and the low level expression only detected at day 3 in group III was significantly lower than that of group II (P<0.05). Conclusion: LSA is an important transplantation antigen which is involved directly in the immunorejection of liver transplantation. We report here for the first time that intrathymic inoculation of LSA can alleviate the rejection of liver allotransplantation; and that grafts can survive for a long time thereby, thus leading to a novel way to achieve liver transplantation immunotolerance. Project (NO. 011106206) supported by the Science and Technology Bureau of Zhejiang Province Foundation  相似文献   

4.
Objective: We investigated the effects of intermittent negative pressure on osteogenesis in human bone marrow-derived stroma cells (BMSCs) in vitro. Methods: BMSCs were isolated from adult marrow donated by a hip osteoarthritis patient with prosthetic replacement and cultured in vitro. The third passage cells were divided into negative pressure treatment group and control group. The treatment group was induced by negative pressure intermittently (pressure: 50 kPa, 30 rain/times, and twice daily). The control was cultured in conventional condition. The osteogenesis of BMSCs was examined by phase-contrast mi-croscopy, the determination of alkaline phosphatase (ALP) activities, and the immunohistochemistry of collagen type I. The mRNA expressions of osteoprotegerin (OPG) and osteoprotegerin ligand (OPGL) in BMSCs were analyzed by real-time poly-merase chain reaction (PCR). Results: BMSCs showed a typical appearance of osteoblast after 2 weeks of induction by intermit-tent negative pressure, the activity of ALP increased significantly, and the expression of collagen type 1 was positive. In the treatment group, the mRNA expression of OPG increased significantly (P<0.05) and the mRNA expression of OPGL decreased significantly (P<0.05) after 2 weeks, compared with the control. Conclusion: Intermittent negative pressure could promote os-teogenesis in human BMSCs in vitro.  相似文献   

5.
孙莉  解霞  刘超  王辉 《大连大学学报》2012,33(3):61-64,68
为了研究益智仁对束缚应激致大鼠海马神经元NMDA受体亚基NR2B表达的调节作用,将30只SD大鼠随机等分为正常对照组、模型对照组和益智仁治疗组。模型对照组、益智仁治疗组大鼠每日束缚1次,连续3周。益智仁治疗组束缚前给予益智仁水提取物灌胃。采用免疫组织化学方法,观察益智仁水提取物对束缚应激大鼠海马神经元NMDA受体亚基NR2B表达的调节作用。结果显示NR2B阳性产物呈深棕色或棕褐色,主要沉积在CA1区和CA3区锥体细胞的细胞膜周边。与正常对照组比较,模型对照组的NR2B阳性产物明显增多(P﹤0.01);益智仁治疗组与模型对照组比较,NR2B阳性产物明显减少(P﹤0.05)。实验结果提示益智仁能够降低束缚应激大鼠海马CA1区和CA3区NMDA受体亚基NR2B的表达。  相似文献   

6.
Objective: To investigate the therapeutic effects and mechanisms of Salvia miltiorrhizae (Danshen) in the treatment of severe acute panereatitis (SAP)- or obstructive jaundice (OJ)-induced heart injury. Methods: A total of 288 rats were used for SAP-(n=108) and O J-associated (n=180) experiments. The rats were randomly divided into sham-operated, model control, and Salvia miltiorrhizae-treated groups. According to the difference of time points after operation, SAP rats in each group were subdivided into 3, 6 and 12 h subgroups (n=12), whereas OJ rats were subdivided into 7, 14, 21, and 28 d subgroups (n=15). At the corre-sponding time points after operation, the mortality rates of the rats, the contents of endotoxin and phospholipase A2 (PLA2) in blood, and pathological changes of the hearts were investigated. Results: The numbers of dead SAP and OJ rats in the treated groups declined as compared with those in the model control group, but not significantly (P>0.05). The contents ofendotoxin (at 6 and 12 h in SAP rats and on 7, 14, 21, and 28 d in OJ rats, respectively) and PLA2 (at 6 and 12 h in SAP rats and on 28 d in OJ rats, respectively) in the treated group were significantly lower than those in the model control group (P<0.01 and P<0.001, respec-tively). Besides, myocardial pathological injuries were mitigated in SAP and OJ rats. Conclusion: In this study, we found that Salvia miltiorrhizae improved myocardial pathological changes, reduced the content of PLA2 in blood, and decreased the mortality rates of SAP and OJ rats, exerting protective effects on the hearts of the rats.  相似文献   

7.
目的：观察天麻素对癫痫大鼠海马Caspase-3表达的影响及其脑保护作用。方法：120只健康成年雄性Wistar大鼠随机分为对照组、PTZ（戊四氮）组、VPA（丙戊酸钠）组、Gb（天麻素大剂量）组和Gs（天麻素小剂量）组（n=24）。对照组和PTZ组分别以生理盐水（4mL/kg·d）灌胃;VPA组给予丙戊酸20mg．kg^-1,Gb组和Gs组分别给予天麻素200mg．kg^-1和100mg．kg^-1;每天1次,连续7天。造模第一天,除对照组大鼠外,余者均腹腔注射戊四氮75mg／kg,记录动物行为学变化。于致痫后12h、2d、5d和7d相应时间点取材,制备脑标本,免疫细胞化学术检测caspase-3表达。结果：致痫后12h,P11Z组Caspase-3有微量表达,其余各组几乎无表达;2—7d。PTZ组Caspase-3表达增加。与PTZ组比较,Gb组、Gs组及VPA组Caspase-3阳性表达降低,差异显著（P〈0．05）;与VPA组比较,Gb组和Gs组Caspase-3表达无显著差异（P〉0．05）。结论：天麻素能降低致痫大鼠海马神经元Caspase-3表达;可能通过抑制神经元凋亡发挥脑保护作用。  相似文献   

8.
目的：观察急性肾功能衰竭（ARF）家兔心肌匀浆自由基、一氧化氮的变化，探讨心肌损伤的体液机制。方法：60只家兔均分为四组（n=15）。ARF模型1组：皮下注射1％HgCl2（1．3ml／kg．bw）；ARF模型2组：肌肉注射50％甘油（10ml／kg．bw）；以等量生理盐水代替HgCl2和甘油作为对照1、2组。24h后，所有动物颈总动脉放血备检，并选择固定位置。制备10％心肌匀浆。经Aeroset型全自动生化分析仪测定血清反映肾功能的生化指标。检测心肌匀浆丙二醛（MDA）、超氧化物歧化酶（SOD）、一氧化氮（NO）及其合酶（NOS）的变化。结果：与相应对照组比较，ARF模型1、2组心匀浆SOD活性下降、MDA含量升高（P〈0．05），ARF模型1、2组心匀浆NO含量增强、NOS及iNOS活性增强（P〈0．05～0．01）。结论：ARF家兔心肌损伤的机制与自由基损伤及NO升高有关。  相似文献   

9.
头孢匹胺治疗下呼吸道感染72例临床观察   总被引：1，自引：0，他引：1  
将72例确诊为下呼吸道感染的患者随机分成2组,在常规治疗基础上,治疗组36例,静脉滴注头孢匹胺1g,每日两次;对照组36例静脉滴注头孢尼西2g,每日一次,两组疗程均为7～14天,观察两组的临床疗效.治疗组和对照组临床治愈率分别是94%和83%,总有效率分别为97%和88%,两组数据比较有统计学意义(P<0.05).结果表明头孢匹胺是第三代头孢菌素,安全抗菌活性强.在下呼吸道感染的治疗中疗效确切.  相似文献   

10.
  相似文献   

11.
Astragalus mongholicus (AM) derived from the dry root of Astragalus membranaceus Bge. var. mongolicus (Bge.) Hsiao is a widely used traditional Chinese medicine. The present study investigated the potential role of AM on renal fibrosis on a rat model of unilateral ureteral obstruction (UUO). We divided 48 Sprague-Dawley rats randomly into 4 groups: sham-operated group (Sham), untreated UUO group, AM-treated (10 g/(kg.d)) UUO group, and losartan-treated (20 mg/(kg.d)) UUO group as positive control. Haematoxylin & eosin (HE) and Masson staining were used to study the dynamic histological changes of the kidneys 7 and 14 d after operation. The expressions of fibronectin (FN), type I collagen (coII), hepatocyte growth factor (HGF), transforming growth factor-pi (TGF-βl), and a-smooth muscle actin (a-SMA) were analyzed by real-time polymerase chain reaction (PCR), immunohistochemistry staining, and Western blot. Results show that, similar to losartan, AM alleviated the renal damage and decreased the deposition of FN and colI from UUO by reducing the expressions of TGF-pi and a-SMA (P<0.05), whereas HGF increased greatly with AM treatment (P<0.05). Our findings reveal that AM could retard the progression of renal fibrosis. The renoprotective effect of AM might be related to inhibition of myofibroblast activation, inducing of HGF and reducing of TGF-β1 expression.  相似文献   

12.
目的：观察戊四氮（PTZ）致痫大鼠海马神经元caspase-3表达以及中药复方AAP的脑保护作用.方法：144只健康成年雄性Wistar大鼠随机分为对照组（CK组）、模型组（PTZ组）、中药大剂量组（AAPl组）、中药中剂量组（AAPm组）、中药小剂量组（AAPs组）和丙戊酸钠组（VPA组）;每组各6只.CK组和PTZ组分别给予生理盐水（4mL/kg.d）灌胃;中药各组分别给予中药复方大、中、小剂量（10.26g/kg、5.13g/kg、2.56g/kg）灌胃,每天1次;VPA组腹腔注射VPA（20mg/kg.d）.造模第一天,除CK组外,其余各组大鼠均腹腔注射戊四氮（PTZ）75mg/kg,观察记录大鼠行为学变化;于致痫后12h、2d、5d、7d相应时间点取材,制备脑标本;免疫组化检测caspase-3表达.结果：致痫后,除CK组外,其余各组海马区caspase-3阳性表达增强;7天,与PTZ组相比,AAPl组、AAPm组和AAPs组海马CA3区caspase-3阳性表达减弱（P〈0.05）.结论：caspase-3参与致痫大鼠海马神经元凋亡过程;AAP能降低caspase-3表达,减少神经元凋亡,有神经保护作用.  相似文献   

13.
目的:探讨生姜透皮帖对一氧化氮、超氧化物歧化酶和丙二醛在模拟运动病时大鼠海马组织中含量的影响。方法:SD大鼠40只,按完全随机方法分组。进行变速旋转,连续三天,每天一小时,第三天麻醉处死,冰浴中取海马组织,检测其中的NO、SOD和MDA含量。结果:药物组大鼠海马组织中NO、MDA含量显著降低(P<0.05),SOD活力升高(P<0.01)。药物组大鼠海马组织中NO、MDA含升高不显著(P>0.05),SOD活力下降也不明显(P>0.01)。结论:生姜透皮帖能使脑血管紧张度降低,脑血流增加,致海马组织局部缺血缺氧得以缓解,氧自由基减少,保持中枢神经系统的兴奋性,能起到抗运动病的作用。  相似文献   

14.
Objective: To investigate the effects and complications of primary and secondary placements of motility coupling post (MCP) in the unwrapped porous polyethylene orbital implant (PPOI) following enucleation. Methods: We investigated 198 patients who received PPOI implantation following the standard enucleation procedure in the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China, from 2002 to 2004. These patients were subgrouped into PPOI-only patients (112 cases, received PPOI following enucleation), primary MCP patients (46 cases, received primary placement of MCP during PPOI operation), and secondary MCP patients (40 cases, received secondary placement of MCP 6 months after the initial surgery). Effects and complications among these three groups were compared. Results: The PPOI-only patients took shorter treatment course when compared with other two MCP groups (P<0.001), without significant difference noted between the two MCP groups. However, the two MCP groups had better prosthetic motility than PPOI-only group (P<0.001), without significant difference between the two MCP groups. In the early stage, 2 eyes in the PPOI-only group and 1 eye in the primary MCP group had PPOI infection. In PPOI-only group, 3 (2.68%) eyes had PPOI exposure, which occurred after fitting the prostheses; 4 eyes (8.70%) in primary MCP group and 1 eye (2.50%) in secondary MCP had PPOI exposure, which occurred before fitting the prostheses. After prosthesis was fit successfully, the excessive discharge and granuloma were 33.9% and 1.79% in PPOI group-only, 53.3% and 8.9% in primary MCP group, and 52.5% and 7.5% in secondary MCP group, respectively. Conclusion: Both primary and secondary placements of MCP into the PPOI following enucleation can help patients to obtain desirable prosthetic motility, but maybe associated with more complications. The primary placement of MCP with skilled operation in selected patients is more recommendable than secondary placement.  相似文献   

15.
Objective: To investigate the enhancive effect ofN, N'-dinitrosopiperazine (DNP) on induced carcinogenesis in nasal and/or nasopharyngeal epithelia among TgN(p53mt-LMP1)/HT transgenic mice to examine the underlying mechanism for the development of nasopharyngeal carcinoma (NPC). Methods: TgN(p53mt-LMPI)/HT transgenic mice and the same strain of C57BL/6J wild-type mice both at the age of 5 months were randomly divided into 2 groups in parallel, respectively, I.e., TgN(p53mt-LMPI)/I-IT cancerous lesion-inducing group (TI), TgN(p53mt-LMP1)/HT control group (TC), C57BL/6J cancerous lesion-inducing group (CI), and C57BL/6J control group (CC). TI and CI mice were treated only with DNP for 16 weeks, twice each week, while TC and CC mice were given the same volume of saline as controls.At the end of treatment, animals were sacrificed to collect epithelial tissue samples from nasal cavity and nasopharynx for pathohistological evaluation by haematoxylin and eosin (HE) staining and for determination on the expression ofTRAF2, c-Jun, and pl 6 by immunohistochemistry. Results: Atypical hyperplasia was more significant in the samples of TI than in those of TC, CI, and CC, with the rates of lesions being 90%, 10%, 0, and 0 (P<0.01) respectively, though DNP was used alone in a much shortened inducing period at less dosage and without the use of carcinogenic promoter 12-O-tetradecanoylphorbol-13-acetate as usual. The expressions of tumor necrosis factor (TNF) recep-tor-associated factor 2 (TRAF2) and c-Jun in these samples were significantly up-regulated in TI (P<0.01), while the expression of p16 was significantly lower in TI than in the other groups (P<0.01). Conclusion: TgN(p53mt-LMP1)/HT mice hold inherited con-stitutional defect in immune surveillance function, which can be aggravated by environmental carcinogens, such as DNP used even though in a much less strength. The enhanced carcinogenesis-inducing effect of DNP on TgN(p53mt-LMP1)/HT mice should be closely associated with abnormal signaling of activator protein-1 (AP-1) pathway, especially up-regulated expressions of TRAF2 and c-Jun, and down-regulated expression of p 16.  相似文献   

16.
INTRODUCTION Acute pulmonary thromboembolism(PTE)is serious pulmonary vascular disease with high mortality.The challenge is to make a correct diagnosiand give appropriate treatment(Nicolaides et al.2001).Effective treatment will decrease morbidityand mortality.This study compares the efficacy,adverse effects and costs of low-molecular-weightheparin(LMWH)and unfractionated heparin(UH).MATERIALS AND METHODS Materialss a or-sis al.,ity ad-ht-).All patients diagnosed as non-massiv…  相似文献   

17.
Objective: In the present study, we have examined the safety and efficacy of recombinant adenovirus encoding human p53 tumor suppressor gene (rAd-p53) injection in patients with advanced non-small-cell lung cancer (NSCLC) in the combination with the therapy of bronchial arterial infusion (BAI). Methods: A total of 58 patients with advanced NSCLC were enrolled in a non-randomized, two-armed clinical trial. Of which, 19 received a combination treatment of BAI and rAd-p53 (the combo group), while the remaining 39 were treated with only BAI (the control group). Patients were followed up for 12 months, with safety and local response evaluated by the National Cancer Institute's Common Toxicity Criteria and response evaluation criteria in solid tumor (RECIST), respectively. Time to progression (TTP) and survival rates were also analyzed by Kaplan-Meier method. Results: In the combo group,19 patients received a total of 49 injections of rAd-p53 and 46 times of BAI, respectively, while 39 patients in the control group received a total of 113 times of BAI. The combination treatment was found to have less adverse events such as anorexia, nausea and emesis, pain, and leucopenia (P<0.05) but more arthralgia. fever, influenza-like symptom, and myalgia (P<0.05), compared with the control group. The overall response rates (complete response (CR)+partial response (PR)) were 47.3% and 38.4% for the combo group and the control group, respectively (P>0.05). Patients in the combo group had a longer TTP than those in the control group (a median 7.75 vs 5.5 months, P=0.018). However, the combination treatment did not lead to better survival, with survival rates at 3, 6, and 12 months in the combo group being 94.74%, 89.47%, and 52.63%, respectively, com-pared with 92.31%, 69.23%, and 38.83% in the control group (P=0.224). Conclusion: Our results show that the combination of rAd-p53 and BAI was well tolerated in patients with NSCLC and may have improved the quality of life and delayed the disease progression. A further study to better determine the efficacy of this combination therapy is warranted.  相似文献   

18.
INTRODUCTION Bronchioloalveolar carcinoma (BAC) is a par-ticular subtype of pulmonary adenocarcinoma de-rived from clara cell and type II pneumocyte. BAC cells grow along and within alveolar spaces while the alveolar framework of the lung is preserved. The incidence of BAC appears to be rising recently. The etiology and pathogenesis of this unique neoplastic disease are still unclear; many studies of oncogene and tumor suppressor gene expression include BAC with all adenocarcinoma o…  相似文献   

19.
This study was aimed at evaluating the daily vitamin intakes of senile diabetics whose diets were self-selected in order to apply the data obtained to prevent and treat senile Type 2 diabetics effectively. The daily vitamin intakes of 43 Type 2 diabetics (group A) and 43 healthy non-diabetics (group B) as revealed by their answer to a questionnaire were evaluated by computer analysis and compared with the Recommended Dietary Allowance (RDA). The data obtained in this study showed that the daily vitamin B1 and B2 intakes in both groups were obviously low, less the 50% of RDA; and that in group A was lower than that in group B. The daily intakes of vitamin E and A were significantly different between group A and group B (P<0.01 for vitamin E and P<0.05 for vitamin A). So the vitamin intakes of the senile diabetics with their self-selected diets were inadequate. The author suggests that it is necessary to give a scientific guide for the diets of senile diabetics. If the vitamin intake from foods is inadequate, vitamin supplements should be given to prevent complications.  相似文献   

20.
通过胶原酶、胰蛋白酶双消化法获取蛋鸡松果体细胞,分为对照(培养基)、酒精(溶剂对照)和褪黑素(MT)三组进行原代细胞培养,采用相对定量RT-PCR方法检测褪黑素(MT)对培养的松果体细胞促性腺激素释放激素-Ⅰ(GnRH-Ⅰ)基因表达的影响。结果表明:MTT检测正常培养的松果体细胞增殖速度第9d达高峰,11d缓降。与对照组比较,MT处理1周显著上调其表达丰度(P<0.05);与酒精溶剂组相比,MT处理1周具有上调其表达的趋势(P<0.1);对照组与酒精组之间没有明显的差异(P>0.05)。从而提示:体外培养松果体细胞的GnRH表达受MT的调控。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号