HPLC法测定中药复方香砂胃苓丸中橙皮苷的含量

目的采用HPLC法测定香砂胃苓丸中橙皮苷的含量。方法HPLC法,Diamonsil C18柱(4.6×250 mm,5um);流动相:甲醇-2%冰醋酸溶液(38?62);流速:1.0mL.min-1;检测波长:284nm。结果橙皮苷含量测定线性范围0.1028~1.028μg内相关系数r=0.9999,平均回收率为96.92%,RSD=0.98%(n=6)。结论该方法分离度高,重现性好,简便,准确,可用于香砂胃苓丸的质量控制。     

A novel robust nomogram based on peripheral monocyte counts for predicting lymph node metastasis of prostate cancer

Accurate methods for identifying pelvic lymph node metastasis(LNM)of prostate cancer(PCa)prior to surgery are still lacking.We aimed to investigate the predicti...     

Proteomic analysis of the effects of caffeine in a neonatal rat model of hypoxic‐ischemic white matter damage

AimWhite matter damage (WMD) is the main cause of cerebral palsy and cognitive impairment in premature infants. Although caffeine has been shown to possess neuroprotective effects in neonatal rats with hypoxic‐ischemic WMD, the mechanisms underlying these protective effects are unclear. Herein, proteins modulated by caffeine in neonatal rats with hypoxic‐ischemic WMD were evaluated.MethodsWe identified differential proteins and performed functional enrichment analyses between the Sham, hypoxic‐ischemic WMD (HI), and HI+caffeine‐treated WMD (Caffeine) groups. Confirmed the changes and effect of proteins in animal models and determined cognitive impairment via water maze experiments.ResultsIn paraventricular tissue, 47 differential proteins were identified between the Sham, HI, and Caffeine groups. Functional enrichment analyses showed that these proteins were related to myelination and axon formation. In particular, the myelin basic protein (MBP), proteolipid protein, myelin‐associated glycoprotein precursor, and sirtiun 2 (SIRT2) levels were reduced in the hypoxic‐ischemic WMD group, and this effect could be prevented by caffeine. Caffeine alleviated the hypoxic‐ischemic WMD‐induced cognitive impairment and improved MBP, synaptophysin, and postsynaptic density protein 95 protein levels after hypoxic‐ischemic WMD by preventing the HI‐induced downregulation of SIRT2; these effects were subsequently attenuated by the SIRT2 inhibitor AK‐7.ConclusionCaffeine may have clinical applications in the management of prophylactic hypoxic‐ischemic WMD; its effects may be mediated by proteins related to myelin development and synapse formation through SIRT2.     

PRRSV Induces HMGB1 Phosphorylation at Threonine-51 Residue to Enhance Its Secretion

Porcine reproductive and respiratory syndrome virus (PRRSV) induces secretion of high mobility group box 1 (HMGB1) to mediate inflammatory response that is involved in the pulmonary injury of infected pigs. Our previous study indicates that protein kinase C-delta (PKC-delta) is essential for HMGB1 secretion in PRRSV-infected cells. However, the underlying mechanism in HMGB1 secretion induced by PRRSV infection is still unclear. Here, we discovered that the phosphorylation level of HMGB1 in threonine residues increased in PRRSV-infected cells. A site-directed mutagenesis study showed that HMGB1 phosphorylation at threonine-51 was associated with HMGB1 secretion induced by PRRSV infection. Co-immunoprecipitation (co-IP) of HMGB1 failed to precipitate PKC-delta, but interestingly, mass spectrometry analysis of the HMGB1 co-IP product showed that PRRSV infection enhanced HMGB1 binding to ribosomal protein S3 (RPS3), which has various extra-ribosomal functions. The silencing of RPS3 by siRNA blocked HMGB1 secretion induced by PRRSV infection. Moreover, the phosphorylation of HMGB1 at threonine-51 was correlated with the interaction between HMGB1 and RPS3. In vivo, PRRSV infection also increased RPS3 levels and nuclear accumulation in pulmonary alveolar macrophages. These results demonstrate that PRRSV may induce HMGB1 phosphorylation at threonine-51 and increase its interaction with RPS3 to enhance HMGB1 secretion. This finding provides insights into the pathogenesis of PRRSV infection.     

The effect of mental countermeasures on a novel brain‐based feedback concealed information test

The feedback concealed information test (fCIT) is a novel form of the CIT, providing participants with feedback regarding their memory concealment performance. The fCIT utilizes event‐related potentials (recognition‐P300 and feedback‐related event‐related potentials) and has been shown to provide high efficiency in detecting information concealment. However, it is unclear how well the fCIT performs in the presence of mental countermeasures. To address this question, participants were trained to use countermeasures during fCIT. Results showed that the recognition‐P300 efficiency decreased when participants used countermeasures. However, the efficiencies of feedback‐related negativity and feedback‐P300 were unchanged, with feedback‐P300 still showing a high detection efficiency (AUC = 0.86) during countermeasures. These findings demonstrate the potential of fCIT for subverting countermeasures.     

男男性行为者艾滋病暴露前预防用药性行为去抑制化情况

目的：了解男男性行为者（men who have sex with men,MSM）在参加暴露前预防用药（pre-exposure prophylaxis,PrEP）临床试验中是否存在性行为去抑制化现象及其影响因素。方法：采用非概率抽样法招募并筛选出108名MSM,随机分为77名服用药物组和31名空白对照组,第12、24、36、48周进行临床随访和问卷调查,问卷调查主要包括社会人口学特征,艾滋病相关知识、态度和行为等相关情况。采用单因素和多因素的广义估计方程分析MSM在参与PrEP中是否存在性行为去抑制化现象及其影响因素。结果：药物服用组MSM在参与PrEP的第12、24、36、48周的性伴个数中位数分别为1（0,6）、1（0,6）、1（0,10）、1（0,3）、1（0,3）,高危性行为次数中位数分别为1（0,26）、1.5（0,8）、1（0,12）、1（0,9）、2（0,30）;空白对照组性伴个数中位数分别为1（0,21）、1（0,2）、1（0,3）、1（0,3）、1（0,3）,高危性行为次数中位数分别为1（0,9）、1（0,6）、0.5（0,15）、0（0,10）、1（0,10）;多因素广义估计方程分析发现MSM在参与PrEP过程中性伴个数及高危性行为次数均没有发生改变（Z=-0.24,P=0.811;Z=0.93,P=0.355）,性行为方式为“1”和“0.5”的较性行为方式为“0”的拥有更多的性伴（Z=2.47,P=0.014;Z=2.24,P=0.025）;发生过商业性行为的MSM较没有发生过的拥有较少的性伴和高危性行为（Z=-2.82,P=0.005;Z=-2.28,P=0.023）;已婚较离异MSM发生较少的高危性行为次数（Z=-2.34,P=0.019）。结论：本研究中暂未发现PrEP中存在性行为去抑制化现象,性行为方式为“1”和“0.5”的MSM拥有较多性伴,是后期随访中的重点管理人群。还需进一步加强对艾滋病相关知识的科普。     

延胡索醋制前后小鼠眼组织中Cu、Zn、Mn含量比较研究

摘 要 目的： 研究延胡索醋制前后对眼组织中微量元素含量的影响,探讨醋制能使延胡索归肝经的真实性。方法: 将小鼠分为延胡索生品组、醋品组和阴性组分别给药,测定并比较其眼底血和眼球玻璃体中的锌、锰、铜含量。结果:延胡索能显著增加小鼠眼底血中Cu、Zn及眼球玻璃体中Zn、Mn含量,醋制延胡索效果更为明显。结论: 醋制延胡索能提高微量元素在眼组织的分布,因肝开窍于目,为延胡索醋制后归肝经提供依据。     

糖尿病辨治7法

论述了糖尿病的分型及论治 ,即清热生津法 ,清热利湿养阴法 ,清热解毒益气养阴法 ,益气健脾法 ,舒肝解郁法 ,滋肾固精法 ,活血化瘀法     

儿童颅内压监测研究进展

颅内高压是儿科较常见的急危重症,颅内压(intracranial pressure,ICP)监测能动态评估脑损伤患者的病情变化,计算脑灌注压,指导临床治疗.ICP监测有其局限性,不能及时反映大脑微血管功能障碍和细胞功能障碍,因此需要在ICP监测的基础上开展多模态监测(multimodality monitoring).ICP监测和多模态监测的信息整合有助于进一步理解脑损伤的病理生理机制,有助于对患者进行针对性个体化治疗.