CT联合血清SMRP早期诊断大鼠恶性胸膜间皮瘤的研究

目的:探讨CT联合血清可溶性间皮素相关蛋白(SMRP)在提高早期诊断恶性胸膜间皮瘤(MPM)中的价值,为早期诊断MPM提供实验依据及理论基础.方法:采用右侧胸腔注射青石棉纤维混悬液诱发大鼠MPM,对大鼠行胸腹部CT平扫及增强扫描,对病变进行CT分期,并比较CT对MPM不同分期的诊断价值.分析不同分期MPM的SMRP表达...     

Mimicking Extracellular Matrix via Engineered Nanostructured Biomaterials for Neural Repair

Extracellular matrix (ECM) consists of proteins, proteoglycans, and different soluble molecules. ECM provides structural support to mammalian cells. ECM is responsible for important cell functions, as well as assembling cells into various tissues and organs, regulating growth and cell-cell interaction. Recent studies have shown the potential of nanostructured biomaterials to mimic native ECM. Developing tailor-made biomaterials that mimic the complex nanoscale mesh of local ECM is not a trivial endeavor: bio-inspired biomaterials are designed to supply a healthy ECM-like structure, capable of filling the lesion cavity, favoring transplanted cell engraftment, providing physical support to endogenous neurogenesis and also tuning the inflammatory response to protect spared neurons. The strategies used to manufacture biomimetic hydrogel scaffold represent particularly important prospects of novel therapies for CNS regeneration. During this review, we describe with details the most promising regulatory pathways from ECM involved in the CNS injury and regeneration and we draw a line to the biomimetic potential of engineered nanostructured biomaterials aimed at mimicking extracellular matrix constructs and favoring the release of pro-regenerative agents. Lastly, a brief overview of their application in clinical trials is provided.     

基于LC-MS/MS技术同时定量分析片仔癀中特征胰酶水解肽

目的：阐明片仔癀中的蛋白组,定量分析其中的特征胰酶水解肽,以提高片仔癀的质量控制水平。方法：优化总蛋白提取条件,采用二辛可宁酸(BCA)法测定总蛋白含量,利用鸟枪法蛋白组学表征片仔癀的蛋白组,并进一步选择含量较高、稳定性好、长度适宜的特征多肽作为目标分析物,采用在线能量分辨质谱法(online ER-MS)优化特征肽的离子对及最佳碰撞能,建立反相液相色谱-选择反应监测(RPLC-SRM)定量分析方法,测定11批片仔癀中目标多肽的含量。结果：利用UniProt数据库从片仔癀中共鉴定了来源于200个蛋白的343个肽段,以酶和骨架蛋白为主;筛选得到ALSSALHER、TLLEGEESR和VAPLGEEFR 3个特征肽,以其作为目标分析物进行定量分析,online ER-MS优化3个特征肽的定量参数离子对分别为m/z 492.3→799.4、517.3→819.4和509.3→637.3,碰撞能分别为25.0、24.4、28.6 eV。方法学验证符合定量要求,3个多肽类成分在各批片仔癀样品中均被检出(ALSSALHER:0.06～0.44μg·g^–1;TLLEGEESR:...     

Recent applications of cell-penetrating peptide guidance of nanosystems in breast and prostate cancer

Cell-penetrating peptides (CPPs) are small peptides from natural sources or designed from other protein sequences that can penetrate cell membranes. This property has been used in biomedicine to add them to biomolecules to improve their capacity for cell internalization and as a guidance tool for specific cell types. CPPs have been shown to enhance cellular uptake in vitro and in vivo, improving the efficacy of anticancer drugs such as doxorubicin and paclitaxel, while also limiting their cytotoxic effects on healthy cells and tissues. The current study reviews the internalization and major therapeutic results achieved from the functionalization of nanosystems with CPPs for guidance into breast and prostate cancer cells in vitro and in vivo. In addition, the practical results obtained are specifically discussed for use as a starting point for scientists looking to begin research in this field.     

TPOAb、HbA1c、PLGF及血脂水平对妊娠期糖尿病孕妇妊娠结局的影响

目的 探讨妊娠期糖尿病(GDM)孕妇抗甲状腺过氧化物酶抗体(TPOAb)、糖化血红蛋白(HbA1c)、胎盘生长因子(PLGF)、血脂等水平及意义.方法 选取在南京市妇幼保健院治疗的GDM患者180例为观察组;选取同期在南京市妇幼保健院产检的健康产妇180例为对照组.于妊娠24～27周,采集空腹静脉血,检测TPOAb、H...     

BNP及NT-proBNP和心肌缺血缺氧关系的研究进展

脑钠肽(BNP)或N端脑钠肽前体(NT-proBNP)已广泛用于心力衰竭的诊断、治疗及预后分析中。近来研究表明,BNP及NT-proBNP参与心肌缺血缺氧的早期病理过程,与常规心肌损伤标志物比较,有助于心肌缺血缺氧损伤的早期诊断,而且特异性和敏感性较高。BNP的合成与缺氧诱导因子(HIF)相关,人们试图通过HIF-1α类似物,诱导BNP合成以保护心肌。另外发现,排除心室室壁张力后,心肌缺氧缺血能直接诱导BNP合成,打破了传统的通过机械张力诱导或促进BNP合成的固有理论。     

嗜铬粒蛋白A及其衍生多肽在天然免疫系统中的作用

嗜铬粒蛋白A(CGA)属于酸性可溶性蛋白质家族,是一种由肾上腺髓质合成,与儿茶酚胺共分泌的应激标志物。研究发现,CGA及其衍生多肽在内环境稳态的保持、钙和葡萄糖的新陈代谢、心血管功能、炎性反应、疼痛缓解、组织修复和胃肠运动中都有重要作用。近年来研究表明,CGA及其衍生多肽还具有抗菌和免疫调节的作用,并且它在这方面的作用得到越来越多的重视。该文CGA及其衍生多肽在天然免疫系统中作用的研究进展予以综述。     

脂联素在子痫前期患者胎盘组织中的表达与其发病的关系

目的 探讨脂联素在子痫前期患者胎盘组织中的表达与其发病的关系.方法 采用免疫组化链霉菌抗生物蛋白-过氧化物连接(SP)法及RT-PCR技术,检测20例正常足月妊娠孕妇(正常妊娠组)、12例轻度子痫前期(轻度子痫前期组)及22例重度子痫前期(重度子痫前期组)患者胎盘组织中脂联素蛋白及其mRNA的表达,并分析其与子痫前期发病的关系.结果 (1)3组孕妇胎盘绒毛合体滋养细胞及细胞滋养细胞胞质内脂联素蛋白均呈阳性表达,且各组内胎盘母面及子面脂联素蛋白的表达水平相互比较,差异均无统计学意义(P＞0.05).(2)重度子痫前期组胎盘组织中脂联素蛋白的表达水平(30 984±14 604)低于轻度子痫前期组(58 360±8910)及正常妊娠组(53 246±17 554),差异均有统计学意义(P＜0.01).重度子痫前期组中妊娠足月者胎盘组织中脂联素蛋白的表达水平(38 890±20 386)与未足月者(29 319±8997)比较,差异无统计学意义(P＞0.05);但与正常妊娠组比较,差异有统计学意义(P＜0.05).(3)3组孕妇胎盘组织中均有脂联素mRNA的表达.其中重度子痫前期组胎盘组织中脂联素mRNA表达水平(1.0±0.2)低于轻度子痫前期组(2.9±0.8)及正常妊娠组(3.3±1.1),差异有统计学意义(P＜0.05).结论 重度子痫前期患者胎盘组织中脂联素mRNA表达水平下降导致其蛋白表达水平也下降,提示脂联素的异常表达参与了子痫前期的发病.     

The length of menstrual bleeding and the risk of urogenital infections in the context of the activity of hemoglobin-derived microbicidal peptides

OBJECTIVE: Well-known natural unspecific antimicrobial factors acting in the vagina are additionally reinforced during menstrual bleeding by hemocidins--a recently discovered novel class of microbicidal peptides generated proteolytically from hemoglobin. The aim of the presented research was to investigate the relation between the average length of menstrual bleeding and the frequency of urogenital infections. We expected that the shorter menstrual bleeding might increase the risk of urogenital infections because is synonymous with the shorter period of exposition on bactericidal action of hemocidins. STUDY DESIGN: The study contains statistical analysis of an average declared length of menstrual bleeding in the group of 267 young, sexually active women with the symptoms of urogenital infections. The control group consisted of 300 young healthy women. RESULTS: The length of menstrual bleeding in the group of patients with urogenital infections (average 4.35 days) was statistically significantly shorter than in the control group (average 4.95 days). The average length of the menstrual cycle was equal and counted ca. 28 days in both groups. CONCLUSION: The length of menstrual bleeding seems to be a significant factor in the vaginal ecology maintenance.