Colostrum IgA1 antibodies recognize antigens from Helicobacter pylori and prevent cytoskeletal changes in human epithelial cells

Helicobacter pylori is a Gram-negative bacterium found on the luminal surface of the gastric mucosa in at least 50% of the world's human population. The protective effect of breastfeeding against H. pylori infection has been extensively reported; however, the mechanisms behind this protection remain poorly understood. Human IgA from colostrum has reactivity against H. pylori antigens. Despite that IgA1 and IgA2 display structural and functional differences, their reactivity against H. pylori had not been previously determined. We attested titers and reactivity of human colostrum-IgA subclasses by ELISA, immunoblot, and flow cytometry. Colostrum samples from healthy mothers had higher titers of IgA; and IgA1 mostly recognized H. pylori antigens. Moreover, we found a correlation between IgA1 reactivity and their neutralizing effect determined by inhibition of cytoskeletal changes in AGS cells infected with H. pylori. In conclusion, colostrum-IgA reduces H. pylori infection of epithelial gastric cells, suggesting an important role in preventing the bacteria establishment during the first months of life. As a whole, these results suggest that IgA1 from human colostrum provides protection that may help in the development of the mucosal immune system of newborn children.     

益气活血化痰法对血管性痴呆大鼠脑组织中内皮素和降钙素相关基因肽的影响

目的 :通过对VD大鼠脑组织ET 1和CGRP含量的测定 ,探讨其在VD形成过程中的发病机制和中药干预机制。方法 :采用放射免疫分析法测定脑组织ET 1和CGRP浓度。结果 :1 模型组、正常组与假手术组比较ET 1含量升高 ,CGRP含量降低 ,均有非常显著性差异 (P <0 0 1) ;2 大剂量组ET 1含量变化较治疗前明显降低 ,CGRP含量较治疗前明显升高 ,均有非常显著性差异 (P <0 0 1)。讨论 :VD在形成过程中ET 1含量增高 ,CGRP含量降低 ,失去二者的平衡 ,中药能有效调节二者的平衡 ,是防治VD的可能机制之一。     

桦褐孔菌对大鼠血管性痴呆的保护作用机制

目的 探讨桦褐孔菌对大鼠血管性痴呆保护作用的潜在机制.方法 选用Wistar大鼠,采用反复夹闭大鼠双侧颈总动脉再灌注,合并腹腔注射硝普钠降压法制备VD模型,动物分为正常对照组、模型组、孔菌药物组(0.5、1.0、2.0 g/kg),连续灌胃给药8周,检测大鼠脑组织中自由基及相关酶以及胆碱能系统的变化.结果 自由基及相关酶检测结果显示,与模型组相比,桦褐孔菌各剂量组大鼠脑组织中SOD和CAT的活性明显升高,MDA的含量明显降低(P<0.05),GSH-PX的活性及Na+-K+-ATP酶的活性无明显变化,桦褐孔菌大剂量组大鼠脑组织中Ca2+-Mg2+-ATP酶的活性明显升高(P<0.05);胆碱能系统及相关酶检测结果显示,与模型组相比,桦褐孔菌各剂量组大鼠脑组织中乙酰胆碱含量及胆碱酯酶活性均无明显变化.结论 桦褐孔菌对VD大鼠保护作用机制可能与增强抗自由基相关酶的活性,增加机体的抗氧化能力,减轻脑组织自由基损伤有关;其作用机制可能与胆碱能系统改善无关.     

Impacto del implante percutáneo de válvula pulmonar en cuanto al momento de reintervenir por disfunción del tracto de salida del ventrículo derecho

Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart defect. Early surgical repair has dramatically improved the outcome of this condition. However, despite the success of contemporary approaches with early complete repair, these are far from being curative and late complications are frequent. The most common complication is right ventricle outflow tract (RVOT) dysfunction, affecting most patients in the form of pulmonary regurgitation, pulmonary stenosis, or both, and can lead to development of symptoms of exercise intolerance, arrhythmias, and sudden cardiac death. Optimal timing of restoration of RVOT functionality in asymptomatic patients with RVOT dysfunction after TOF repair is still a matter of debate. Percutaneous pulmonary valve implantation, introduced almost 2 decades ago, has become a major game-changer in the treatment of RVOT dysfunction. In this article we review the pathophysiology, the current indications, and treatment options for RVOT dysfunction in patients after TOF repair with a focus on the role of percutaneous pulmonary valve implantation in the therapeutic approach to these patients.     

益肾化浊,解毒通络法治疗血管性痴呆30例

血管性痴呆(VD)继发于脑血管病变之后,随着老龄化社会的发展,脑血管病发病率的上升,血管性痴呆(VD)患者有逐年增高的趋势,已成为目前危及人类健康的常见病.而随着人们生活水平的不断提高,对生存质量更为关注,对血管性痴呆(VD)预防治疗的重视程度日益提高.孙氏[1]明确指出:"浊毒"损伤脑络,脑窍壅塞,神机失统而发病.王氏[2]认为浊毒为害是VD发展的关键.中医学对痴呆的认识较早,根据中医学理论,采用益肾化浊,解毒通络法治疗血管性痴呆取得满意疗效.     

浓缩生长因子与1,25二羟基维生素D3对骨髓间充质干细胞增殖与成骨分化的影响

目的:研究浓缩生长因子(concentrated growth factor,CGF)及其与1,25二羟基维生素D3(1,25(OH)_2VD_3)联合应用时,对骨髓间充质干细胞(BMSCs)增殖及成骨分化的影响。方法:全骨髓培养法提取、分离SD大鼠股骨BMSCs,分别采用6种不同培养液而分为6组。使用SD大鼠血液在Medifuge离心机中制备CGF,并收集CGF浓缩液。实验A、B、C组,分别为采用含5%、10%和20%浓度CGF的L-DMEM培养液组,单独使用1,25(OH)_2VD_3(10~(-10)mol/L)的为D组。B组与D组混合为E组。F组为空白对照组。采用上述6组培养基孵育BMSCs 7 d。采用CCK-8实验评价大鼠BMSCs在不同条件下的生长增殖情况;ALP活性染色实验检测各组ALP的生成,实时定量PCR检测成骨分化标志物基因OCN、Col-1和Runx2共3种成骨分化标志物基因的表达情况。结果:5%和10%的CGF浓缩液能促进大鼠BMSCs增殖,且10%浓度优于5%浓度。而20%CGF和1,25(OH)_2VD_3(10~(-10)mol/L)都抑制了大鼠BMSCs的增殖。1,25(OH)_2VD_3(10~(-10)mol/L)与CGF(10%)浓缩液联合应用时,细胞增殖介于两者之间。A、B、C组ALP活性及OCN、Col-1和Runx2的mRNA表达均受到了抑制。D组和E组均促进了大鼠BMSCs的ALP活性,并提高了OCN、Col-1和Runx2的mRNA表达水平。结论:CGF浓缩液(10%)与1,25(OH)_2VD_3(10~(-10)mol/L)的联合应用,可促进大鼠BMSCs的增殖,并对其成骨分化具有促进作用。     

孕产妇维生素D缺乏与早产的关系

维生素D是人体必需的一种营养素,具有广泛的生物学效应。妊娠会使孕妇体内激素水平和代谢状况发生改变,所需营养素明显增加,也是维生素D缺乏的一个高发阶段。维生素D缺乏可能是造成早产的危险因素之一。该文就孕产妇维生素D缺乏与早产的关系进行综述。     

妇女性病患者心理干预的效果分析

目的探讨性病患者在接受常规治疗同时进行心理干预,是否能提早疾病的康复时间。方法对妇女性病门诊就诊的尖锐湿疣患者,根据自愿原则进行心理测试,并对实验组进行心理干预。结果进行心理干预的尖锐湿疣患者的复发率明显低于未作心理干预的患者（P〈0．05）,且治愈时间提早。结论尖锐湿疣患者在常规治疗同时进行心理干预疗效明显。