蜜环菌多糖含药血清对Aβ25—35诱导PC12细胞损伤保护机制

目的：探讨蜜环菌多糖含药血清对Aβ25—35诱导大鼠肾上腺嗜铬细胞瘤细胞（PC12细胞）损伤保护的作用机制。方法：在Aβ25—35诱导PC12细胞损伤模型的基础上加入蜜环茵多糖含药血清,采用比色法检测含药血清对Aβ25—35诱导PC12细胞损伤培养液中乳酸脱氢酶的活力、丙二醛含量及超氧化物歧化酶活力的影响。结果：不同浓度的含药血清对Aβ25—35损伤的PC12细胞的存活率有提高作用,含药血清浓度在5％时达最大值（P〈0．05或P〈0．01）;5％浓度的含药血清可明显降低模型细胞培养液中LDH活力、MDA含量,提高SOD活力。结论：蜜环菌多糖含药血清对Aβ25—35损伤的PC12细胞有保护作用．机制可能与提高细胞抗氧化能力有关。     

基于《内经》“肺热叶焦，则生痿躄”理论探讨肺与骨质疏松症之间的关系

《内经》“肺热叶焦,则生痿躄”理论明确提出中医肺脏与痿证即骨质疏松症（osteoporosis,OP）发病具有相关性。笔者将集中探讨肺与骨质疏松症发生的相关性,并列举由肺病导致的其他脏器病变所致的肺-肾-骨质疏松症;肺-脾-骨质疏松症以及肺-肝-骨质疏松症之间发生的关联性,希望能为现代临床治疗此病提供可行的中医学理论依据,更好地体现及发挥中医药在此病治疗中的优势。     

The relationship between T-cell infiltration in biopsy proven acute T-cell mediated rejection with allograft function and response to therapy: A retrospective study

AimTo evaluate the degree of CD3, CD20, Th17, and Tregs infiltration in kidney biopsy of the patients with acute cellular rejection and the possible relation with graft outcome.Materials and methodsIn this retrospective study, fifty patients with Acute T Cell-Mediated Rejection (ATCMR) were enrolled. Previous and one year clinical follow-up data were collected. The kidney specimens were evaluated for infiltration of CD3, CD20, FOXP3, and Th17 with IHC. According to the serum creatinine level in one-year follow-up of the patients after rejection therapy and function of the transplanted organ from the day admitted into the hospital, they were respectively categorized in Stable graft function versus impaired graft function; appropriate response to treatment versus failure to response.ResultsTreg (P = 0.96) and Th17 (P = 0.24) cells were more in the unstable group than the stable group, but the difference wasn't significant. On the other hand, the FOXP3/Th17 ratio was higher in the stable group (P = 0.22). Moreover Treg (P = 0.1) and Th17 (P = 0.15) were higher in failure to response group, but FOXP3/Th17 was higher in proper response group (P = 0.8).ConclusionFrom the results, it can be concluded that TH17 infiltration has a more significant effect on graft outcome and response to rejection therapy.     

血清锌含量与环氧化酶-2的表达和胃癌发病有关

目的研究锌与胃癌的发病关系。方法用电感耦合等离子体原子发射光谱法(ICP-AES)检测锌的含量,同时用免疫组化链霉卵-生物素-辣根过氧化酶复合物法(SP法)观察Cox-2的表达。结果发现胃癌病人血清中锌与健康对照组相比有所不同,胃癌组Zn2 、M n2 低于健康对照组(P<0.05),Cox-2阳性组锌的含量明显低于Cox-2阴性组(P<0.05)。结论血清锌降低对胃癌发病是个关键的因素。     

Identification of flower herbs in Chinese pharmacopoeia based on DNA barcoding

Objective Flower herbs are an important category of traditional Chinese medicinal materials, some of which are used as healthcare tea in folk. However, the increasing adulteration of medicinal herbs is threatening consumer safety. The adulteration of flower herbs and their healthcare tea products in the market were investigated. Methods A total of 33 flower herb samples from several retail pharmacies in China were randomly collected and 27 flower healthcare tea samples were purchased online. They were identified using ITS2-based Traditional Chinese Medicine Database (TCMD). Additionally, Lonicerae Japonicae Flos and the adulterants were compared in the ITS2 secondary structures. Results There were one adulterant (Inulae Flos) in flower herb materials and eight adulterants in healthcare tea samples. Inula linariifolia was an adulterate species of Inulae Flos, Robinia pseudoacacia was of Sophorae Flos, and Lonicera macranthoides was of Lonicerae Japonicae Flos. Sophorae Flos and Lonicerae Japonicae Flos were two healthcare tea products with high adulteration rates. Conclusion The TCMD is powerful tool to identify flower herbs and the adulterants that frequently occurred in the flower herb market, especially online shops.     

铁过载对骨稳态的影响及相关机制的研究

铁是几乎所有生物体新陈代谢中必不可少的微量元素。但体内过量铁会产生细胞毒性,可使骨的强度和密度降低,铁过载可以通过抑制成骨细胞分化、增殖和刺激破骨细胞生成来破坏骨稳态。研究证实,铁螯合剂对铁过载导致的骨稳态失衡具有潜在的治疗价值。本文综述了铁过载对骨稳态的影响,阐明这一过程的细胞及分子机制,总结了铁螯合剂对成骨细胞及破骨细胞的不同影响,旨在为治疗铁过载造成的骨稳态失衡提供新的治疗靶点。     

老年肱骨近端骨折内侧柱重建的研究进展

肱骨近端内侧柱是肱骨头内下方的一段连续骨皮质区域,该区域自被提出以来,越来越受到临床和科研的重视.研究发现它有增加内固定的稳定性,维持肱骨头高度,防止内翻,以及降低螺钉穿出的风险等作用,生物力学研究也表明,内侧柱在增加锁定钢板的刚度、抗扭转力、抗剪切力等方面有突出的表现.虽然有诸多好处,但它的概念、具体区域尚未有统一的...     

基于BMP-Smad/RUNX2信号通路探讨固本增骨方含药血清对大鼠BMSCs增殖和成骨分化的影响＊

目的 基于BMPs-Smad/RUNX2信号通路探讨固本增骨方含药血清对大鼠骨髓间充质干细胞增殖及成骨分化的作用机制。方法 制备固本增骨方含药血清；台盼蓝染色观察细胞生长情况；取P3代大鼠BMSCs分为空白血清组、5%、10%、20%、30%浓度含药血清组及传统诱导组，分别对各组大鼠BMSCs进行培养及成骨诱导，向6组加入相应培养液24 h后幵始测量细胞计数，连续测量4天；成骨诱导2周后，进行碱性磷酸酶染色试剂盒说明书进行染色，光镜下观察各组细胞蓝紫色区域的密集程度；ELISA法检测COL-I、ALP、BGP、OPN蛋白的含量；Real-time PCR检测BMPs信号通路相关基因BMP2、BMP4、Smad1、RUNX2表达。结果 各组固本增骨方含药血清组在培养24h后比空白组及传统成骨诱导组OD值比较差异均具有统计学意义（P < 0.05），并且20%含药血清组较5%、10%及30%含药血清组OD值比较差异具有统计学意义（P < 0.05）；碱性磷酸酶染色后镜下观察在浓度为20%时染色区域最密集；5%、10%、20%含药血清组与其他各组BGP、OPN、ALP、COL-I含量比较差异具有统计学意义（P < 0.05），且20%含药血清组与5%、10%含药血清组比较差异具有统计学意义（P < 0.05）；20%含药血清组与其他各组BMP2、BMP4、Smad1、RUNX2 mRNA表达比较差异均具有统计学意义（P < 0.05）。结论 固本增骨方能促进BMSCs的增殖，并且能促进成骨标志蛋白BGP、OPN、ALP、COL-I蛋白含量的增加，且在20%浓度为最佳，这个机制可能是激活了BMP-Smad/RUNX2信号通路实现的。     

从OPG/RANK/RANKL信号转导系统探讨老年性骨质疏松的发病机制

骨质疏松症属于骨科临床常见的慢性、增龄性疾患,随着全球老龄化的加剧,老年人已成为骨质疏松症的高发人群,后期并发脊柱、四肢及骨盆等重要部位的疏松性骨折是致残、致死的主要原因,严重威胁老年群体的身心健康。在我国,老年性骨质疏松症及其并发症防治方面的医疗投入逐年增长,使得社会经济负担越发繁重。近年来随着研究技术与水平的不断提升,在骨分子生物学领域有了不少突破,发现一些细胞因子和信号通路与骨质疏松症的发生、发展密切相关,其中OPG/RANK/RANKL信号转导系统也在骨代谢中起着关键的调控作用。笔者针对老年性骨质疏松症的发病特点,围绕OPG/RANK/RANKL信号通路在该病发生中的作用机制展开综述,以期拓宽老年性骨质疏松症的防治思路。     

PI3K/AKT通路与骨质疏松症的关系及中医药干预的研究进展

骨质疏松症是一种由多种信号通路共同介导和影响的临床骨科常见的代谢性疾病,因其并发症常严重影响患者正常生活质量,并造成较大的经济损失而被广泛研究及报道。中医药治疗方案与PI3K/AKT通路因其能直接或间接影响骨骼组成细胞中的成骨细胞与破骨细胞共同介导的"骨平衡",在骨质疏松症治疗中产生显著效果而被越来越多学者深入的研究。近年来,大量动物实验及分子研究分析指出,中医药治疗方案、PI3K/AKT通路与骨质疏松症之间具有较大的相关性,国内外学者也对中医药手段直接或间接激活PI3K/AKT通路治疗骨质疏松症的相关机制进行了多维度、深层次的研究。虽然目前对于中医药治疗方案、PI3K/AKT通路与骨质疏松症之间的相关性研究不断深入,但在其分子机制研究等方面仍存在欠缺。本文将通过对中医药治疗方案、PI3K/AKT通路与骨质疏松症的相关性研究进行综述,旨在为中医药干预骨质疏松症提供新的思路。