CORRELATIONS BETWEEN VIDEO CAPSULE ENDOSCOPIC FINDINGS AND CLINICAL ACTIVITY IN CROHN’S DISEASE

Background and Aims: Video capsule endoscopy (VCE) has become increasingly important as a simple method for observing the entire small intestine. The indications for VCE are obscure gastrointestinal bleeding and investigation of Crohn’s disease (CD). However, the correlation between endoscopic findings obtained by VCE and clinical findings in known cases of CD is not clear, and we therefore investigated this in the present study. Patients and methods: In 30 patients with known CD (Crohn’s disease activity index [CDAI] 0–420; median = 158.3), double contrast enteroclysis (ENT) was performed 1–3 weeks prior to VCE. The relationship between the VCE findings and hematological analysis/CDAI was examined. Results: In 17 of 30 patients, the entire small intestine could be investigated by VCE, whereas in the remaining 13 patients the terminal ileum could not be investigated. The following exhibited positive correlations: total lesions and CDAI (correlation coefficient values: r_s = 0.661, adjusted P < 0.0061), ulcers and C‐reactive protein (CRP) (r_s = 0.607, adjusted P < 0.0061), total lesions and CRP (r_s = 0.604, adjusted P < 0.0061). Conclusions: Analysis with VCE suggests that CDAI and CRP indicate the activity of intestinal lesions in patients with known CD, and that CRP, in particular, is associated with the activity of ulcerative lesions of the intestine. This may contribute to revised guidelines for VCE in the future.     

谷氨酰胺转移酶对大豆分离蛋白成膜性能的影响

研究了谷氨酰胺转移酶（TGase）对大豆蛋白膜特性的影响。研究表明：在成膜溶液中加入TGase（4U／g）可以使膜的抗拉强度增加16．79，6，表面疏水性增加39．2％，同时也明显降低了膜的断裂伸长率、水分含量、总可溶性物质量及透光率，但是对水蒸气转移速率几无影响。扫描电镜（SEM）显示，酶法交联膜的表面比对照膜略为粗糙，断面却更为均匀致密。SDS-PAGE分析表明，TGase催化SPI产生了共价交联。     

纤维素分解菌BSX5的分离、鉴定及产酶条件

利用透明圈法从袋装降解的笋干中分离到一株分解纤维素的细菌菌株. 该菌株呈长杆状、革兰氏染色为阳性、产芽孢,命名为BSX5.其生理生化特征和16S rDNA序列同源性分析,发现该菌株与Bacillus subtilis的同源性为99%,系统发育树分析与Bacillus subtilis遗传关系最近,确定该菌株为Bacillus subtilis. 采用以3,5-二硝基水杨酸（DNS）为显色剂、羧甲基纤维素钠（CMC-Na）为底物,测定不同培养条件下BSX5菌株的酶活力,结果最适产酶时间为8-12 h,最适产酶温度为50 ℃,最适产酶pH值为5.5～6.5.     

单侧液压脑损伤对大鼠双侧海马GFAP表达和CA1区突触传递的影响

目的研究单侧液压脑损伤(FPI)对大鼠双侧海马区胶质纤维酸性蛋白(GFAP)表达和CA1区突触传递的影响。方法建立大鼠单侧液压脑损伤模型,脑标本分为对照组(包括正常对照和假手术对照)、FPI损伤同侧组和FPI损伤对侧组。免疫组化法检测海马水平切片GFAP表达,对海马CA1区锥体神经元进行细胞内记录。结果FPI大鼠双侧海马齿状回门区和CA1区GFAP表达均比对照组明显增强。FPI损伤同侧组兴奋性输入-输出关系曲线的斜率比其他两组显著增大(P<0.05);FPI损伤同侧组和对侧组双脉冲易化(PPF)比值和抑制性突触后电位(IPSP)幅值均比对照组显著减小(P<0.05);FPI损伤同侧组和对侧组双脉冲抑制(PPD)比值均比对照组显著增大(P<0.05)。结论大鼠单侧液压脑损伤对双侧海马均可产生影响,导致双侧海马CA1区兴奋性突触传递增强,抑制性突触传递减弱。     

骨形成蛋白2基因修饰的老年大鼠骨髓间充质干细胞成骨分化能力的研究

目的观察年龄因素对骨髓间充质干细胞(marrow mesenchymal stem cells, MSCs)成骨分化能力的影响;了解基因治疗对老年大鼠MSCs成骨分化能力的影响. 方法 1月龄(幼年组)、9月龄(成年组)及24月龄(老年组)雄性Wistar大鼠各6只,取MSCs经体外分离、培养及携带骨形成蛋白2(bone morphogenetic protein 2,BMP-2)基因的腺病毒载体(Ad-BMP-2)转染后,定量检测BMP-2、碱性磷酸酶(alkaline phosphate,ALP)表达,以及成骨细胞标志性蛋白:Ⅰ型胶原、骨涎蛋白(bone sialoprotein,BSP)和骨桥素(osteopontin, OPN)的表达.将转染的各组MSCs分别与磷酸三钙(tricalcium phosphate, TCP)复合后植入裸鼠体内,3周后取材,比较各组诱导异位成骨能力. 结果 ELISA检测表明BMP-2基因修饰的MSCs可以有效表达BMP-2,且表达量在各年龄组间差异无统计学意义(P>0.05);各组ALP于诱导后第9天达高峰,但组间差异均无统计学意义(P＞0.05);诱导后第7天,RT-PCR半定量检测示各组均有成骨细胞特征性蛋白,即:Ⅰ型胶原、OPN及BSP的明显表达,表达量在各组间差异无统计学意义(P>0.05);BMP-2基因转染的MSCs与TCP复合后可诱导裸鼠体内异位成骨,各组成骨量差异无统计学意义(P>0.05). 结论 BMP-2基因修饰的老年大鼠MSCs可以恢复成骨分化能力,基因治疗可能为老年性骨骼疾病提供一种新的治疗途径.     

hs-CRP、TAS联合血脂检测在早老性痴呆症诊断中的应用研究

[目的]研究超敏C反应蛋白（hs-CRP）、总抗氧化状态（TAS）联合血脂检测在早老性痴呆症诊断中的应用价值：[方法]选择浦东新区精神卫生中心早老性痴呆专科门诊患者54例，作超敏C反应蛋白、总抗氧化状态与血脂检测。[结果]与对照组比较，实验组hs-CRP、TAS差异非常显著，t1=4．55，t2=2．79，P1〈0．001，P2〈0．01；血脂中甘油三酯、低密度脂蛋白胆固醇、载脂蛋白B、Lp（a）差异显著；t1=3.01，P1〈0．01，t2=2．21，P2〈0．05，t3=2．64，P3〈0．01，t4=1．91，P4〈0．05。[结论]超敏C反应蛋白、总抗氧化状态联合血脂（甘油三酯、低密度脂蛋白胆固醇、载脂蛋白B、Lp（a））检测对实验室诊断早老性痴呆症具有较好敏感性和特异性，临床应用前景乐观。     

红藻氨酸致痫后大鼠海马ERK、P38 MAPK和JNK的活性变化

目的研究红藻氨酸(KA)诱导大鼠癫痫发作后海马组织细胞外调节蛋白激酶(ERK)、p38MAPK和c-jun氨基末端激酶(JNK)的活性(磷酸化状态)的变化情况。方法立体定向大鼠侧脑室内注射KA引起大鼠癫痫发作,采用Western-blot方法观察KA致痫后大鼠海马中活性ERK、p38MAPK和JNK的变化。结果KA诱导大鼠癫痫发作后,海马组织ERK、p38MAPK和JNK的磷酸化水平开始增高,分别于30min、1h和30min后达高峰,呈对照组的4.76倍、2.16倍和3.95倍,两组比较差异具有显著性(P<0.01),之后逐渐下降。结论KA致痫大鼠癫痫发作后,海马组织MAPKs的活性产生变化,其信号通路可能参与癫痫发作后海马组织的病理生理反应过程。     

A trip through the signaling pathways of melanoma

Many cellular signaling pathways are involved in the development of cancer. Depending on the tumor entity, the nature as well as the mode of activation can differ. Some signaling pathways frequently show changes as all tumor cells have to fulfill some basic requirements such as independence from growth factors or insensitivity against apoptosis. In this review, the possibilities of a tumor to manipulate signaling pathways to reach these goals are exemplified based on an archetypical melanoma cell. In addition, new therapeutic options based on the knowledge of signaling pathways will be discussed.     

慢性强迫游泳应激对大鼠情绪和脑细胞外信号调节激酶磷酸化水平的影响

目的探讨慢性强迫游泳应激对大鼠情绪和脑细胞外信号调节激酶磷酸化(P-ERK1/2)水平的影响。方法将30只SD雄性大鼠随机分为游泳应激组、装置对照组和空白对照组,每组10只。游泳应激组每天接受5min的游泳应激,装置对照组每天接受5min的新异场景应激,均连续14 d,空白对照组不进行任何干预,然后观察大鼠行为(体质量增长量、旷场测验和糖精水溶液偏好测验)。采用免疫印迹法测定大鼠海马和前额叶皮质的P-ERK1/2。结果(1)游泳应激组在应激7d和应激14d的体质量增长[分别为(75±22)g和(70±24)g]均低于空白对照组[分别为(101±35)g和(115+47)g],均P＜0.05。(2)装置对照组的粪便排泄量[(1.4±1.9)粒]多于空白对照组[(0.4±1.0)粒]和游泳应激组[(0.1±0.3)粒],均P＜0.05；而游泳应激组的水平活动距离[(2077±1245)cm]少于空白对照组[(2990±1038)cm]和装置对照组[(3110±1462)cm],均P＜0.05。(3)游泳应激组的糖精水溶液摄入量[(11±6)g]和糖精水溶液摄入量占总液体摄入量的比例[(37±16)％]均低于空白对照组[分别为(15±4)g和(47±15)％],均P＜0.05。(4)游泳应激组在海马[(46±95)％]和前额叶皮质[(65±24)％]的P-ERK2水平均低于空白对照组[分别为(76±30)%和(99±42)%],均P＜0．05。结论慢性强迫游泳应激能诱发大鼠的抑郁情绪,降低P-ERK2在海马和前额叶皮质的水平。