基质金属蛋白酶-13在骨性关节炎发病中的活性调控研究

目的 研究一氧化氮(NO)是否通过膜型基质金属蛋白酶-1(MT1-MMP)间接激活基质金属蛋白酶-13酶原(pro-MMP-13).方法 购买并传代人软骨肉瘤细胞(SW1353),用NO供体S-亚硝基-N-乙酰基青霉胺(SNAP),SNAP+NO清除荆氧合血红蛋白(OxyHb)和SNAP+组织金属蛋白酶抑制物-2(TI...     

腰麻药剂量对妊高征血栓前状态的影响

目的 研究腰麻对妊高征(PHS)血栓前状态的影响.方法 确诊为PHS择期剖宫产产妇60例,随机均分为A、B、C三组,分别用布比卡因7、9 mg或11 mg施行腰麻.另选确诊PHS经阴道分娩产妇20例作对照(D组).观察手术前后血栓调节蛋白?、D-二聚体(D-D)和血小板因子4(PF4)的变化.结果 与术前比较,A、B、C组术后TM、D-D显著下降,PF4显著升高(P<0.05或P<0.01).术后C组PF4明显高于D组(P<0.01).结论 PHS产妇手术后血栓前状态三项指标呈现显著变化,但腰麻局麻药剂量对其无明显影响.     

The aluminum content of bone increases with age, but is not higher in hip fracture cases with and without dementia compared to controls

Aluminum is considered a potentially toxic metal, and aluminum poisoning may lead to three types of disorders: aluminum-induced bone disease, microcytic anemia and encephalopathy. This is well known in patients with chronic renal failure, but since healthy subjects with normal renal function retain 4% of the aluminum consumed, they are also at risk of long-term low-grade aluminum intoxication. Included in this study were a total of 172 patients (age range 16–98 years) with the aim of examining whether aluminum accumulates in bone with increasing age. Additionally, we aimed to investigate whether the aluminum content of bone differs between controls and hip fracture cases with and without dementia, in particular in those with Alzheimers disease. During operations for all cases, bone biopsies were taken with an aluminum-free instrument from the trabecular bone. The samples were measured for their content of aluminum using an inductively coupled mass spectrometer. We found an exponential increase in aluminum content of bone with age. The average aluminum values, adjusted for age, were similar in men and women (P=0.46). No significant differences in sex- and age-adjusted mean aluminum values between the controls and the hip fracture cases with (P=0.72) and without (P=0.33) dementia could be detected. The average aluminum concentration among cases with Alzheimers disease was also similar to the values of hip fracture patients with other types of dementia (P=0.47). Odds ratios of hip fracture for each quartile of aluminum content in bone were also estimated to detect non-linear effects, but we did not find any statistically significant association remaining after age and sex adjustment. Thus, our results indicate that we accumulate aluminum in bone over our life span, but this does not seem to be of major pathogenetic significance for the occurrence of hip fracture or dementia.     

Interleukin-13 genetic polymorphisms in Singapore Chinese children correlate with long-term outcome of minimal-change disease.

BACKGROUND: Minimal-change nephrotic syndrome (MCNS) has been associated with atopy. As interleukin-13 (IL-13) has been implicated in the pathogenesis of MCNS, we postulated that IL-13 genetic polymorphisms could influence either susceptibility or clinical course of the disease. METHODS: Seventy-two Singapore Chinese children with MCNS and 78 normal controls were screened for single nucleotide polymorphisms (SNPs) in the IL-13 gene by direct sequencing. Allele and genotype frequencies of these SNPs were determined and their relationship with different clinical courses was analysed. RESULTS: Six SNPs were identified in the 5' promoter, exon 4 and 3' untranslated region (3'UTR). The three SNPs in the 3'UTR--4738 (G/A), 4793 (C/A) and 4926 (C/T)--were in tight linkage disequilibrium (Delta > or = 0.99). There was no difference in allele or genotype frequencies between MCNS children and normal controls. However, there was a significantly lower frequency of allele 4738G in those MCNS children who were still relapsing after 5 years of follow-up (G = 0.52), compared with those in complete remission (G = 0.72; P<0.05) and normal controls (G = 0.69; P<0.05). Haplotype analysis showed a significantly higher frequency of the GCC haplotype in controls and MCNS patients in complete remission (chi2 = 6.35; P<0.02), while the frequency of AAT haplotype was higher in those MCNS children still relapsing after 5 years of follow-up (chi2 = 5.38; P<0.02). Moreover, peripheral blood mononuclear cell IL-13 mRNA expression in patients with haplotype AAT was significantly higher than in those with haplotype GCC. CONCLUSIONS: These results suggest that genetic polymorphisms in the 3'UTR of the IL-13 gene correlate with long-term outcome of MCNS, rather than disease susceptibility, in Singapore Chinese children.     

IL-13和TNF-a在支气管哮喘及慢性阻塞性疾病(COPD)中的临床研究

目的本研究旨在探讨血清细胞因子IL-13、TNF-a在支气管哮喘、慢性阻塞性肺疾病(COPD)患者中的浓度变化,探讨IL-13、TNF-a与哮喘、慢性阻塞性肺疾病(COPD)的发病机理以及诊疗中意义。方法40例支气管哮喘C Asthma),40例慢性阻塞性肺疾病(COPD)患者及20例健康对照者,入院时进行肺功能检杳,同时抽取静脉血,用酶联免疫吸附试验(ELISA)测定血清中的细胞因子IL-13(白细胞介素13),TNF-a(肿瘤坏死因子)的浓度。结论支气管哮喘及COPD急性发作期患者的血清IL-13、TNF-α的浓度明显高于健康对照组(P<0.01)。提示IL-13、TNF-α细胞因子参与支气管哮喘及COPD发病的机制。     

重组人白细胞介素-13对巨核细胞系-Dami细胞原癌基因c-mpl表达的影响

目的:研究重组人白细胞介素-13(rhIL-13)对巨核细胞系-Dami细胞原癌基因c-mpl表达的影响.方法:实验组细胞培养系统中分别加入25 ng/ml,50 ng/ml,100ng/ml rhIL-13,对照组不加任何细胞因子.用RT-PCR法检测c-mpl mRNA的表达.结果:经25 ng/ml、50 ng/ml、100ng/ml rhIL-13处理过的实验组Dami细胞较之对照组其c-mpl mRNA的表达分别提高24.8%、27.9%和31.5%.结论:rhIL-13增强了Dami细胞原癌基因c-mpl表达;rhIL-13促进Dami细胞增殖的部分机制可能是通过上调c-mpl的表达来实现的.     

乳腺癌基质金属蛋白酶13蛋白的表达及其与预后的关系

目的:探讨基质金属蛋白酶13(MMP-13)在乳腺癌中的表达情况及其与临床预后的关系.方法:采用组织芯片及免疫组化SP法检测了183例乳腺癌组织中MMP-13的表达水平,分析乳腺癌组织中MMP-13的表达情况与临床病理因素之间的相关性,并结合完整的10年随访资料探讨MMP-13与乳腺癌预后的关系.结果:乳腺癌组织中MMP-13的阳性表达率(54.1%)显著高于良性乳腺疾病(13.3%,P＜0.01).MMP-13的表达与临床TNM分期、淋巴结转移状态、组织学分级密切相关(P＜0.01),而与肿瘤大小、年龄、月经状态、病理类型以及雌孕激素受体状态无关.MMP-13高表达组10年生存率低于低表达组(P＜0.01).结论:MMP-13在乳腺癌中表达水平升高,其高表达预示预后不良.     

支气管哮喘患儿IL-18及IL-13水平的初步研究

支气管哮喘是儿科常见病、多发病,其发病与免疫功能状态有密切关系。作者对66例哮喘急性期、缓解期患儿进行了白细胞介素18(IL-18)及白细胞介素13(IL-13)的检测,以探讨哮喘患儿细胞因子的改变及其临床意义。1临床资料1.1一般资料2002年11月~2005年11月,本科住院哮喘患儿66例,其     

小鼠自身免疫性心肌炎心肌TNFSF13B的表达及三七总皂甙对其的影响

目的探讨自身免疫性心肌炎（AMC）小鼠心肌肿瘤坏死因子SF13B（TNFSF13B）的表达变化及三七总皂甙对其的影响。方法BALB／C雄性小鼠72只，随机分为自身免疫性心肌炎组（A组）、三七总皂甙组（P组）、对照组（C组）。采用猪心肌球蛋白制备小鼠AMC动物模型，电镜观察心肌组织超微结构改变，免疫组化法检测心肌TNFSF13B蛋白表达。结果A组心肌组织的超微结构损伤严重，P组较A组损伤程度明显减轻；C组心肌TNFSF13B蛋白表达量极少，A组心肌TNFSF13B蛋白表达增加，呈现动态变化，P组心肌TNFSF13B蛋白表达显著低于A组（P〈0．05或P〈0.01）。结论自身免疫性心肌炎可诱导心肌TNFSF13B蛋白的表达，三七总皂甙可能通过下调心肌TNFSF13B蛋白的表达而减轻心肌损伤。