Aberrations of growth factor control in metastatic follicular thyroid cancerin vitro

The aggressiveness of follicular thyroid cancer (FTC) varies widely, and metastasis is the primary cause of death. Uncontrolled proliferation of cancer cells may be associated with loss of growth factor control. We investigated the effects of stimulating (epidermal growth factor [EGF]; thyreotropin [TSH] in low concentrations) and inhibiting growth factors (transforming growth factor beta 1 [TGF beta 1]; TSH in high concentrations) on invasion and growth of FTC cell lines from the thyroid tumor (FTC133) and from the lymph node (FTC236) and lung (FTC238) metastases of the same patient. Invasion—penetration through an 8m pore membrane, covered by Matrigel (basement membrane)—and growth were measured using the MTT-method. EGF (10 ng/ml) and TSH in low concentrations (1 mU/ml) stimulated invasion and growth of all FTC cell lines, but the amplitude of stimulation differed significantly. The parental cell line FTC133 was considerably more responsive to growth factor stimulation than the metastatic clones. Invasion of FTC133 was enhanced by 42% (EGF;p<0.02) and 21% (TSH;p<0.01), invasion of FTC236 by 8% (EGF;p<0.02) and 8% (TSH;p<0.01), and invasion of FTC238 by 9% (EGF;p<0.02) and 8% (TSH;p<0.01). Conversely, invasion and growth of FTC133 were significantly more inhibited by TGF beta 1 (10 ng/ml) and supraphysiologic concentrations of TSH (100 mU/ml) than the cell lines from the lymph node and lung metastases. At day 7, invasion of FTC133 was inhibited by 32% (TGF beta 1;p<0.02) and 21% (TSH;p<0.01), invasion of FTC236 by 18% (TGF beta 1;p<0.02) and 11% (TSH;p<0.01), and invasion of FTC238 by 16% (TGF beta 1;p<0.02) and 12% (TSH;p<0.01). Moreover, we analyzed growth factor independence in minimally supplemented or unsupplemented medium. Growth, but no invasion was evident when cells were cultured completely unsupplemented over 7 days. These results suggest that metastatic FTCs may have developed by escaping from the normal control of TSH and other growth factors.     

幽门螺杆菌疫苗免疫机制的研究进展

幽门螺杆菌(H.pylori)是定植于人体胃粘膜的重要致病菌,而粘膜疫苗以其有效的保护性免疫成为防治H.pyiori的热点,但对相应的免疫机制的认识目前尚不明确.故本文对H.pyiori疫苗的保护性免疫机制中的抗原递呈机制,抗体的作用以及TH细胞反应的作用等研究进展做一概要介绍.     

男性抗精子抗体对体外受精一胚胎移植的影响

目的;评价男性抗精子抗体对体外受精-胚胎移植(IVF-ET)的影响。方法:以ELISA方法测定施行IVF-ET的150对不育夫妇中男方精浆抗精子抗体(AsAb)并分组:AsAb阳性组22例,AsAb阴性组128例。对比分析抗精子抗体及抗体类型对体外受精、卵裂和早期胚胎发育的影响,同时对移植后的妊娠率和流产率进行分析。结果:AsAb阳性组体外受精数明显低于AsAb阴性组(P<0.01),两组的卵裂数则无明显差异(P>0.05),而在阳性组中,不同抗体类型间体外受精、卵裂及胚胎质量无明显差异(P>0.05)。在移植日,AsAb阳性组的I级胚胎较阴性组低,而ⅢⅣ级胚胎和2原核受精细胞(2PN)明显增加(P<0.01)。两组移植后临床妊娠流产率无显著差异(P>0.05)。结论:AsAb能明显降低精子体外受精能力,对早期胚胎发育有损害。精子体处理不能完全清除AsAb对IVF影响。     

精神分裂症与KCNN3基因1137～1140缺失移码突变传递不平衡研究

目的 探讨KCNN3基因1137～1140的4个碱基缺失所致移码突变与精神分裂症的关系。方法 95个核心家系共289名家庭成员，包含107例精神分裂症患者纳入本研究。精神分裂症采用CCMD-Ⅱ-R诊断标准。KCNN3基因1137～1140的4个碱基缺失基因型检测使用PCR技术和限制性内切酶DdeI消化方法。精神分裂症与KCNN3基因1137～1140缺失4个碱基的关联分析采用基于单倍型的单倍型相对风险率和传递／不平衡检验。结果 患者组与正常父母组比较，KCNN3基因1137～1140的4个碱基缺失的基因型频数和等位基因频率分布差异无统计学意义（χ^2=0．253，P〉0．05和χ^2＝0．010，P〉0．05）。基于单倍型的单倍型相对风险分析发现父母传递与不传递给患者的KCNN3基因等位基因之间差异无统计学意义（χ^2=0．042，P〉0．05）。传递不平衡检验结果发现KCNN3基因等位基因传递不存在连锁不平衡（χ^2=3．000，P＝0．0833）。结论 本组研究对象中，KCNN3基因第1外显子1137～1140的4个碱基缺失的发生率少；分析结果提示KCNN3基因第1外显子1137～1140的4个碱基缺失的等位基因与精神分裂症无关联。     

Comparison of nasal pressure transducer and thermistor for detection of respiratory events during polysomnography in children

STUDY OBJECTIVES: The results of small studies have suggested that a nasal-cannula pressure transducer has a higher sensitivity than a thermistor in detecting hypopneas and diagnosing sleep-disordered breathing in both adults and children. We compared a thermistor alone, and in conjunction with a pressure transducer, for detection of sleep-disordered breathing in children during in-home polysomnography. DESIGN: Retrospective analysis of a subsample of a prospective cohort study. SETTING: Students attending elementary school in the Tucson Unified School District. PARTICIPANTS: A subsample of the Tucson Children's Assessment of Sleep Apnea study population. MEASUREMENTS AND RESULTS: Polysomnographic recordings of 40 children (24 girls and 16 boys, mean age 9.2 +/- 1.7 years; range 6-11 years) were analyzed to compare the detection of sleep-disordered breathing events by 2 different methods of measuring airflow: thermistor alone and thermistor with nasal-cannula pressure transducer (transducer) used simultaneously. The transducer detected all the respiratory events detected by the thermistor, but the thermistor detected only 84% of the transducer-defined events. Consequently, the transducer-derived mean respiratory disturbance index was higher than that detected by the thermistor (7.0 +/- 3.8 vs 5.9 +/- 3.4, P < .001). The bias error between transducer respiratory disturbance index and thermistor respiratory disturbance index on a Bland-Altman plot was 1.08 (95% confidence interval, 0.8 - 1.4). There was good agreement between the thermistor and the transducer for making the diagnosis of sleep apnea using a cutoff of a respiratory disturbance index greater than 5 (kappa = 0.69). The quality of the tracings with the transducer was comparable to that of the thermistor, but the transducer dislodged more frequently. CONCLUSION: The use of a nasal transducer in conjunction with a thermistor was more sensitive than the thermistor alone in detecting sleep-disordered breathing in children during unattended polysomnography.     

人TFPI基因转染对兔移植静脉血栓形成和近期通畅率的影响

目的： 为减少冠状动脉旁路移植术后血栓形成，探讨人组织因子途径抑制因子(TFPI)基因转染对兔移植静脉血栓生成的影响。方法：构建真核表达质粒pCMV-(Kozak)TFPI。采用阳离子脂质体和腔内加压灌注法，转染移植静脉内皮细胞。RT-PCR、Western blotting和免疫组化法检测外源基因在兔移植静脉中的表达。病理标本、扫描电镜观察移植静脉血栓形成情况，血管多普勒观测其通畅率。结果：移植静脉中有人TFPI基因和蛋白表达。静脉移植术后3 d，基因转染组、空载体和空白对照组分别有1条、8条和7条移植静脉发生血栓，术后30 d，以上各组分别有0条、5条和5条移植静脉完全闭塞，前者静脉血栓发生率和闭塞率均低于后两者(P<0.05)。扫描电镜显示两对照组内皮表面有红细胞和血小板黏附、聚集，而转染组基本正常。结论：人TFPI基因干预，减少了兔移植静脉血栓形成，提高了近期通畅率。     

胡萝卜籽挥发油的抗生育作用

胡萝卜籽挥发油对小鼠有抗着床,抗早、中和晚期妊娠作用。对大鼠也有抗着床作用。挥发油中的萜类碳氢化合物部位,对小鼠皮下注射抗早期妊娠的ED_(50)为2.9ml/kg,甲地孕酮和hCG能明显逆转其作用;对假孕小鼠蜕膜瘤有抑制作用,此作用不能被甲地孕酮拮抗,皮下注射于早孕大鼠24、48小时后血浆孕酮浓度明显下降。以上提示其抗早孕作用机制可能与抑制孕酮合成和蜕膜反应有关。此外,挥发油碳氢部分无雌激素和抗雌激素活性,低浓度时对早孕大鼠离体子宫的收缩活动没有影响,高浓度则表现抑制作用。     

我国中年与老年女性抑郁倾向及影响因素的比较分析

目的 比较分析我国中年和老年女性抑郁倾向及影响因素的差异性,为有针对性的改善中年与老年女性群体的心理健康水平提供参考。方法 选取中国健康与养老追踪调查(CHARLS)2018年数据,以45～59岁中年女性和≥60岁老年女性为研究对象,采用流行病调查中心抑郁量表(CES-D)评估其抑郁倾向。中年和老年女性抑郁倾向的比较采用均值检验,使用倾向性评分匹配法(PSM)对中年和老年女性进行匹配后,进一步探索其组间的差异,采用稳健Tobit回归模型探究抑郁倾向的影响因素。结果 7 964例中老年女性的CES-D评分为(9.53±6.86)分。其中,中年女性、老年女性CES-D评分分别为(9.13±6.62)分、(9.96±7.09)分,老年女性的抑郁倾向评分高于中年女性(t=-5.361,P<0.001)。稳健Tobit回归结果显示,文化程度、居住地、健康自评、身体残疾、慢性病、因身体疼痛而苦恼、BADL受损、IADL受损、是否与配偶或同居者一起生活、家庭成员数量、现有负债、地带分布是中年和老年女性抑郁倾向共同的影响因素。年龄及其二次项、子女数量、有无农业自雇以外的工作是中年女性抑郁倾向的影响因素; 每月来看望1次及以上的子女数量、是否照顾孙子女、是否有社交活动、是否上网、是否退休是老年女性抑郁倾向的影响因素。结论 我国老年女性的抑郁倾向较中年女性明显,且影响因素存在差异性。应针对不同人群特征,提供更有针对性的预防策略,促进中年和老年女性心理健康良性发展。     

脾阴虚证大鼠模型中水通道蛋白及肠道菌群的变化分析

目的：以脾阴虚证模型大鼠为研究对象,探析脾阴虚对胃肠吸收、水液代谢及肠道菌群的影响。方法：采用荤素饮食不节、负重疲劳游泳和温热伤阴药灌胃复合因素建立脾阴虚证大鼠模型,观察空白组和模型组大鼠的体质量、进食量、饮水量、游泳持续时间的变化;苏木素-伊红（HE）染色观察胃和结肠组织病理损伤情况;间苯三酚法检测尿D-木糖排泄率;酶联免疫吸附测定法（ELISA）检测血清中胃泌素（GAS）含量;蛋白免疫印迹法（Western blot）检测胃组织中血管活性肠肽（VIP）、水通道蛋白3(AQP3)、AQP4的相对表达水平;实时荧光定量聚合酶链式反应（Real-time PCR）检测胃组织中VIP、AQP3、AQP4的mRNA相对表达水平;16S rDNA测序分析其肠道菌群的变化。结果：与空白组比较,一般体征结果显示,模型组大鼠体质量和进食量均明显降低,饮水量明显增多（P<0.05,P<0.01）,游泳持续时间显著减少（P<0.01）;病理检测结果显示,模型组大鼠胃组织黏膜出现排列不齐,结肠组织黏膜可见明显变薄或有残缺,上皮细胞出现坏死甚至脱落现象;与空白组比较,模型组大鼠尿D-木糖排...