热休克蛋白70-1基因多态性对中暑易感性的影响

目的:探讨热休克蛋白70-1(HSP70-1)基因多态性对中暑易感性的影响。方法:采用病例-对照1∶2研究设计。采用PCR产物直接测序法检测HSP70-1基因rs1043618(+190G/C)多态性的基因型。包含不同等位(G/C)的基因片段插入pGL3-Basic以构建等位特异性重组表达载体,并分别与内对照质粒pRL-TK共转染人脐静脉内皮细胞株,应用荧光素酶报告基因分析法比较不同等位基因重组载体在热应激情况下的相对荧光素酶表达活性。结果:rs1043618(+190G/C)位点GG、GC和CC基因型表达与对照组比较,CC基因型在病例组中的频率明显升高,差异有统计学意义(11.5%vs.4.4%,P=0.006)。在显性模式下,携带C等位基因的患者在病例组中的频率明显高于对照组(53.1%vs.40.7%,P=0.031)。荧光素酶报告实验显示,与+190C等位基因重组载体相比,在热应激状态下+190G等位基因重组载体可明显增强荧光素酶活性(P=0.012)。结论:HSP70-1基因rs1043618多态性与中暑易感性有关,其原因可能在于影响了HSP的表达水平。     

糖耐康颗粒含量测定方法研究

目的：研究糖耐康颗粒的含量测定方法。方法：采用高效液相色谱（HPLC）法测定糖耐康中迷迭香酸的含量,C18色谱柱（150 mm×4.6 mm,5 μm）,流动相为0.1%三氟乙酸－甲醇（60：40）,检测波长λ为330 nm,理论板数大于2 000,用标准曲线法测定;采用HPLC法测定人参皂苷Rg1、Re、Rb1的含量,采用C18色谱柱（150 mm×4.6 mm,5 μm）,流动相为水－乙腈,梯度检测方法,检测波长λ为203 nm,理论板数均大于2 000,用标准曲线法测定。结果：迷迭香酸在浓度为0.300-0.500 mg·mL^-1范围内线性关系良好,回归方程为：Y=1E+07X-7 334,R₂=0.999,测得加样回收率为97.32%（RSD 1.25%）。人参皂苷Rg1在0.138-0.220 mg·mL^-1范围内均有良好的线性关系,回归方程为：Y=2E+06X+34 864,R₂=0.999;人参皂苷Re在0.126 mg·mL^-1-0.250 mg·mL^-1范围内均有良好的线性关系,回归方程为：Y=2E+06X+39 879,R₂=0.999;人参皂苷Rb1在0.132-0.220 mg·mL^-1内均有良好的线性关系,回归方程为：Y=2E+06X+39 070,R₂=0.999。3种人参皂苷的加样回收率分别为：Rg1 97.97%（RSD 1.83%）;Re 101.80%（RSD 1.83%）;Rb1 98.35%（RSD 1.82%）。结论：该含量测定方法简便、快捷、可靠,可用于糖耐康的质量控制。     

硫普罗宁注射液处方组成及关键工艺控制点研究

目的:探索硫普罗宁注射液处方组成及制备工艺。方法:以pH值、含量及有关物质为评价指标,对影响硫普罗宁注射液的稳定性因素分别进行研究,优选出其制备工艺。结果:筛选出了影响硫普罗宁注射液稳定性的因素并优化了制备工艺关键控制点。结论:根据筛选出的关键工艺控制点制定工艺能够制备出符合质量标准的硫普罗宁注射液。     

甘肃种植地黄品种筛选及施肥对产量品质的影响

目的:本试验为了筛选优质地黄品种和确定适宜的施肥量。方法:进行地黄品种比较及施肥对产量品质的影响研究。结果:北京3号地黄生长势最强,产量最高,为26 250 kg·hm~(-2),单株块根最粗,块根直径平均为4.4 cm,水溶性浸出物含量最高,达到71.7%;地黄施用300 kg·hm~(-2)磷酸二铵时,单株块根数最多,为5个,产量最高,达到25 500 kg·hm~(-2),酸不溶性灰分较低,为2.6%,浸出物含量最高,达到76.9%。结论:通过种植北京3号品种,同时施用300 kg·hm~(-2)肥料时能获得较大经济效益。     

鹰嘴豆中3种异黄酮及其乙氧基化衍生物体外协同降糖活性研究＊

目的：通过对鹰嘴豆中3种异黄酮类化合物染料木素、鹰嘴豆芽素A、刺芒柄花素进行乙氧基化结构修饰,研究其降糖活性及协同降糖活性。方法：对上述3种异黄酮类化合物进行乙氧基化结构修饰,并研究该3种异黄酮类化合物及其衍生物降糖活性,并对化合物进行组合给药,研究其之间存在的协同降糖活性,选择胰岛素抵抗HepG2细胞作为降糖活性筛选模型。结果：获得4个乙氧基化产物,3个母体异黄酮衍生物中染料木素的降糖活性优于鹰嘴豆芽素A和刺芒柄花素,差异具有统计学意义（P<0.05）,3个母体异黄酮衍生物最大给药剂量与阳性药盐酸二甲双胍相比,效果不如盐酸二甲双胍,差异均具有统计学意义（P<0.05或P<0.01）。衍生物中化合物a和d之间差异无统计学意义（P>0.05）,化合物b和c降糖效果均不如化合物a和d,差异具有统计学意义（P<0.05）,其中化合物d较修饰前降糖活性有明显提高（P<0.05）。组合5的降糖活性与盐酸二甲双胍相当,差异无统计学意义（P>0.05）。结论：本研究发现,通过化合物组合,化合物之间可以起到协同作用,发挥更好的降糖效果,为开发具有自主知识产权的降糖药物提供一定的基础。     

Evaluating rotational kinematics of the knee in ACL-ruptured and healthy patients using 3.0 Tesla magnetic resonance imaging

Purpose

Rotational knee laxity is an important measure in restoring knee stability following anterior cruciate ligament (ACL) injury, but is difficult to quantify with current clinical tools. The hypothesis of the study is that there is greater tibial rotation (TR) in women than men, and also in ACL-deficient than healthy knees.

Methods

Sixteen healthy (8 men, 26.8?±?6.4?years; 8 women, 26.9?±?3.8?years) and ten ACL-deficient (5 men, 33.6?±?10.5?years; 5 women, 36.3?±?10.7?years) subjects received bilateral knee MRI in 15° of flexion using a custom device to apply a constant axial compressive load (44?N). A rotational torque (3.35?Nm) was sequentially applied to obtain images at internal and external rotation positions. T ₂-weighted images were acquired in internal and external rotation. Images were segmented and TR was calculated. To assess reproducibility, six knees were scanned twice on separate days. Group comparisons were made with unpaired t tests, while intrasubject comparisons were made using paired t tests.

Results

Healthy women demonstrated greater TR than men (13.6°?±?4.7° vs. 8.3°?±?3.6°; P?=?0.001). Male ACL-deficient knees showed greater TR than the contralateral knee (15.7°?±?6.9° vs. 7.7°?±?5.6°; P?=?0.003), and compared to male controls (P?=?0.002). ACL-deficient women showed greater TR compared to their contralateral leg (15.1°?±?2.3° vs. 10.0°?±?4.3°; P?=?0.01). The intraclass correlation coefficient of the TR measurement was 0.913, and the SEM?=?1.1°.

Conclusions

Kinematic MRI is a reproducible method to quantify total knee rotation. Women have more rotational laxity than men, particularly in the external rotation position. ACL rupture leads to increased rotational laxity of the knee.

Level of evidence

Retrospective case–control series, Level III.     

有氧运动对2型糖尿病大鼠腓肠肌氧化应激及MAPKs信号通路的影响

目的:研究有氧运动对2型糖尿病大鼠胰岛素抵抗、腓肠肌氧化应激以及MAPKs信号通路的影响。方法:健康雄性Wistar大鼠30只,随机分为正常对照组(C组)、糖尿病对照组(DC组)和有氧运动组(DE组),其中C组以普通饲料喂养,DC组和DE组以高脂饲料喂养。4周后,对DC组和DE组大鼠采用单次注射链脲佐菌素(STZ)的方法建立2型糖尿病大鼠模型,继续高脂饲料喂养4周后,DE组大鼠进行无负重游泳训练6周,训练期间C组大鼠继续以普通饲料喂养,DC组和DE组大鼠继续以高脂饲料喂养。6周后,处死所有大鼠,测试空腹血糖(FBG)、空腹胰岛素(FINS)并计算胰岛素抵抗指数(HOMA-IR),测试腓肠肌超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GPX)活性及丙二醛(MDA)水平,RT-PCR法测试腓肠肌p38和JNK mRNA表达,Western-blot法测试腓肠肌ERK1/2和p-ERK1/2表达。结果:和C组相比,DC组大鼠FBG、FINS和HOMA-IR均显著升高,腓肠肌SOD和GPX活性显著降低而MDA水平显著升高,腓肠肌p38、JNK1、JNK2 mRNA相对表达量显著升高,p-ERK1、ERK2和p-ERK2相对表达量显著升高而ERK1相对表达量差异无统计学意义。与DC组相比,DE组大鼠FBG、FINS和HOMA-IR均显著降低,腓肠肌SOD和GPX活性显著升高而MDA水平显著降低,腓肠肌p38和JNK1 mRNA相对表达量显著升高而JNK2 mRNA相对表达量无统计学意义,腓肠肌p-ERK1、ERK2和p-ERK2相对表达量显著升高而ERK1相对表达量无统计学意义。结论:有氧运动可激活糖尿病大鼠腓肠肌MAPKs信号通路系统,增强机体抗氧化酶SOD和GPX活性,改善糖尿病大鼠氧化应激状态,降低其胰岛素抵抗水平。     

体外沉默NLRP3对AngⅡ诱导的子宫内膜间质细胞增殖以及分泌活性的影响#br#

Objective?To study the effect of silencing Nod like receptor 3 (NLRP3) on the proliferation and secretion activity of angiotensinⅡ(AngⅡ) induced endometrial stromal cells (ESCs). Methods?the changes of cell number stimulated by different concentrations of AngⅡ were observed, and the best concentration of AngⅡwas determined; ESCs were arranged into 4 groups: normal group, AngⅡgroup, AngⅡ+empty virus group (empty group) and AngⅡ was determined +NLRP3-RNAi group (silence group). The mRNA and protein contents of NLRP3, ColⅠand fibronectin in cells were measured by RT-PCR and Western blot respectively. Results?AngⅡcould stimulate cell number increased, and 10-5 mol/L AngⅡwas the best (all P<0.05). Matched with normal group, the mRNA and protein contents of NLRP3, Col I and fibronectin in AngⅡgroup were significantly increased(all P<0.05); Matched with the empty group, the mRNA and protein contents of them in the silencing group were significantly lower (all P<0.05). Conclusion?Silencing NLRP3 in vitro can significantly reduce the proliferation and secretory activity of ESCs induced by AngⅡ.     

磁共振体素内不相干运动对于肿块样乳腺良恶性病变的诊断价值

目的通过与常规磁共振动态增强扫描(DCE-MRI)比较,探讨体素内不相干运动(IVIM)是否能进一步提高肿块样乳腺良恶性病变的诊断能力。方法 24例良性乳腺病变(22例女性)和31例恶性乳腺病变(27例女性)均进行DCE-MRI和IVIM检查。在常规DCE-MRI中计算初始强化率(IER)和时间-信号强度曲线(TIC)。在IVIM中计算组织弥散系数(D)。结果恶性病变IER的平均值均高于良性病变(P<0.001),但D平均值均低于良性病变(P<0.001)。恶性病变中Ⅲ型TIC更为常见而Ⅰ型TIC更为少见。在鉴别诊断肿块样乳腺良恶性病变方面,D的曲线下面积(AUC)(0.98)、敏感性(93.55%)、特异性(100.00%)和诊断准确率(96.36%)最高。D和TIC联合使用的AUC高达0.99。结论在肿块样乳腺良恶性病变的鉴别诊断方面,IVIM较常规DCE-MRI更具优势。而IVIM和DCE-MRI结合使用将进一步提高肿块样乳腺良恶性病变诊断准确性。