炮制对甘遂、牛膝、苦杏仁特殊毒性及药效的影响

炮制前后毒理学研究表明,经炮制可降低甘遂、牛膝、苦杏仁对EB病毒早期抗原的激活作用,降低甘遂的皮肤刺激作用、二阶段皮肤肿瘤促进作用及峻泻作用。减毒同时可保留药效或增效。     

INTRABEAM实施乳腺癌术中放疗系统临床应用观察(附20例报告)

目的:评价INTRABEAM术中放射治疗系统临床应用的安全性和优势.方法:INTRABEAM对20例保乳手术患者实施术中瘤床放疗,均为单次照射每次20Gy,施用器规格为4.5cm(范围1.5-5.0cm),治疗持续时间35.5-51分钟.结果:术中照射治疗后有3例发生治疗区局部积液,经抽吸并加压包扎后愈合,乳房水肿1例.结论:INTRABEAM术中放射治疗系统近期无明显毒副作用,INTRABEAM术中放射治疗系统是一项安全良好耐受性技术,病人乐于接受.     

Inhibiting DNA methylation alleviates cisplatin-induced hearing loss by decreasing oxidative stress-induced mitochondria-dependent apoptosis via the LRP1–PI3K/AKT pathway

Cisplatin-related ototoxicity is a critical side effect of chemotherapy and can lead to irreversible hearing loss. This study aimed to assess the potential effect of the DNA methyltransferase (DNMT) inhibitor RG108 on cisplatin-induced ototoxicity. Immunohistochemistry, apoptosis assay, and auditory brainstem response (ABR) were employed to determine the impacts of RG108 on cisplatin-induced injury in murine hair cells (HCs) and spiral ganglion neurons (SGNs). Rhodamine 123 and TMRM were utilized for mitochondrial membrane potential (MMP) assessment. Reactive oxygen species (ROS) amounts were evaluated by Cellrox green and Mitosox-red probes. Mitochondrial respiratory function evaluation was performed by determining oxygen consumption rates (OCRs). The results showed that RG108 can markedly reduce cisplatin induced damage in HCs and SGNs, and alleviate apoptotic rate by protecting mitochondrial function through preventing ROS accumulation. Furthermore, RG108 upregulated BCL-2 and downregulated APAF1, BAX, and BAD in HEI-OC1 cells, and triggered the PI3K/AKT pathway. Decreased expression of low-density lipoprotein receptor-related protein 1 (LRP1) and high methylation of the LRP1 promoter were observed after cisplatin treatment. RG108 treatment can increase LRP1 expression and decrease LRP1 promoter methylation. In conclusion, RG108 might represent a new potential agent for preventing hearing loss induced by cisplatin via activating the LRP1-PI3K/AKT pathway.KEY WORDS: Cisplatin, DNMT, Apoptosis, Hair cell, Spiral ganglion neurons, RG108, Mitochondrial dysfunction, ROS     

Colorectal cancer screening for the natural population of Beijing with sequential fecal occult blood test: a multicenter study

Objective To assess the prevalence of colorectal cancer(CRC)in Beijing and the reliability or the sequential fecal occult blood test(SFOBT)for CRC screening.Methods Of the natural population(48 100 persons)in several Beijing communities,we screened 26 827 persone with age over 30 using the SFOBT screening program,Guaiacum Fecal Occult Blood Test(GFOBT),lmmuno Fecal Occult Blood Test(IFOBT),and colonoscopies.Results The screening rate of the population was 74%.The positive rate of SFOBT was 5.6%.The prevalence of CRC in the entire population of Beijing was therefore calculated to be 36.57/10^5.Of 12 CRC detected patients,4 cases were in stage DukesA (33.33%),7 cases in stage Dukes B(58.33%),only 1 case(8.34%)in stage Dukes C.Conclusions The prevalence of CRC in Beijing is one of the highest in China,Individuals at high risk for CRC or those over 50 years of age should be considered as primary candidates for screening,SFOBT screening is a cost-effective and reliable method for early detection of CRC.     

慢性乙肝患者HBV-DNA载量与超敏C反应蛋白及丙氨酸氨基转移酶水平的相关性分析

目的探讨慢性乙型肝炎（CHB）患者血清中HBV-DNA载量与超敏C反应蛋白（hs-CRP）及ALT水平的相关性。方法对141例慢性乙肝患者的血清采用荧光定量聚合酶链反应（FQ-PCR）检测HBV-DNA载量,免疫透射比浊法及酶速率法分别测定血清hs-CRP和ALT的水平。结果 CHB患者hs-CRP及ALT水平显著高于正常对照组（P均〈0.01）,且随肝损害程度的加重而升高（P〈0.01或P〈0.05）;不同HBV载量组间ALT及hs-CRP水平比较,差异均无统计学意义（P〉0.05）。hs-CRP及ALT水平变化与HBV-DNA载量均无相关性（r=0.137,r=0.211,P〉0.05）。结论多数CHB患者具有不同程度炎症反应,但其炎症程度与乙肝病毒复制程度无关。     

The elevated expression of osteopontin and NF-κB in human aortic aneurysms and its implication

The expression and significance of osteopontin (OPN) and NF-κB in patients with thoracic aortic aneurysm (TAA) and abdominal aortic aneurysm (AAA) were investigated.Thirteen TAA specimens,20 AAA specim...     

智能代理在网络课程监控中的应用模式研究

网络课程作为终身教育学习资源的一种,越来越受到人们的重视.在网络课程中,是否具备良好的监控能力,是影响学习者学习效果的关键因素.而目前的网络监控普遍存在智能程度不高问题,无法满足网络监控的需要.该文将智能代理技术与电子学档结合起来对网络课程进行监控,以期对今后网络课程监控方面的研究提供一些帮助.     

多囊卵巢综合征患者控制性超促排卵过程AMH和INHB浓度变化的临床研究

目的：探讨多囊卵巢综合征（ polycystic ovarian syndrome , PCOS ）患者控制性超促排卵（ controlled ovarian hyperstimulation,COH）过程中血清抗苗勒管激素（anti-Mullerian hormone,AMH）和抑制素B（inhibin B,INHB）浓度的变化及其对COH结局的预测价值。方法 PCOS 组患者37例,对照组患者41例。检测患者月经周期第2/3天（ D2/3）、促性腺激素（gonadotrophin,Gn）刺激第5天（D5）、人绒毛膜促性腺激素（human chorionic gonadotropin,hCG）日（D-hCG）血清AMH及INHB浓度及取卵日卵泡液中AMH及INHB浓度,观察其动态变化及其对COH结局的影响。结果在COH过程中,血清AMH浓度逐渐降低,而血清INHB浓度逐渐升高。 PCOS组患者hCG日血清雌二醇（ estrodiol,E2）浓度、获卵数、冷冻胚胎数较对照组明显升高（P＜0．05,P＜0．001）,而Gn用量、受精率均低于对照组,差异有统计学意义（P＜0．05）,2组患者的临床妊娠率比较,差异无统计学意义（P＞0．05）。血清AMH和INHB浓度与Gn剂量、hCG日E 2浓度具有相关性（P＜0．05,P＜0．001）,但是与获卵数、临床妊娠率无相关性（P＞0．05）。结论 PCOS患者 AMH和INHB浓度在COH过程中呈现动态变化,可以预测COH中卵巢的反应性,但是对超促排卵结局的预测价值还有待进一步研究。     

A型行为与原发性高血压的关系探讨

目的:探讨A型行为对高血压病的发生、发展的影响.方法:采用A型行为问卷,随机调查230例患者,分为高血压组与非高血压组,其中高血压组147例(A型行为89例,占89/147),非高血压组66例(A型行为14例,占14/66).17例被剔除.并对A型行为(24例)和B型行为(26例)患者的血管活性物质去甲肾上腺素(NE)、肾素(Ren)、血管紧张素Ⅱ(Ang Ⅱ)、醛固酮(ALd)水平进行测试.结果:高血压组A型行为人数明显多于非高血压组,P＜0.05,有显著差异.A型行为患者的血浆NE、Ren水平明显高于B型行为患者,P＜0.05,有显著差异,Ang Ⅱ、Ald两组P＞0.05,无显著差异.结论:A型行为对高血压病的发生、发展有着一定的影响,对病人的预后可能产生不利作用.