What information can we gain from performing adaptive radiotherapy of head and neck cancer patients from the past 10 years?

The aim of the review was to present the current literature status about replanning regarding anatomical and dosimetric changes in the target and OARs in the head and neck region during radiotherapy, to discuss and to analyze factors influencing the decision for adaptive radiotherapy of head and neck cancer patients. Significant progress has been made in head and neck patients’ evaluation and qualification for adapted radiotherapy over the past ten years. Many factors leading to anatomical and dosimetric changes during treatment have been identified. Based on the literature, the most common factors triggering re-plan are weight loss, tumor and nodal changes, and parotid glands shrinkage. The fluctuations in dose distribution in the clinical area are significant predictive factors for patients’ quality of life and the possibility of recovery. It has been shown that re-planning influence clinical outcomes: local control, disease free survival and overall survival. Regarding literature studies, it seems that adaptive radiotherapy would be the most beneficial for tumors of immense volume or those in the nearest proximity of the OARs. All researchers agree that the timing of re-planning is a crucial challenge, and there are still no clear consensus guidelines for time or criteria of re-planning. Nowadays, thanks to significant technological progress, the decision is mostly made based on observation and supported with IGRT verification. Although further research is still needed, adaptive strategies are evolving and now became the state of the art of modern radiotherapy.     

Zhang Weishen: A Pioneer in the Development and Industrial Production of Penicillin in New China

The research and development of penicillin started with difficulty before 1949 and achieved certain results. In 1951, after the founding of the People's Republic of China, Zhang Weishen, as the only Chinese scientist who had been trained and worked in a penicillin research and development center in the United States for many years, overcame many difficulties and returned to China. In 1953, with the efforts of Zhang Weishen and his colleagues, China realized the industrialized production of penicillin, alleviating the urgent needs of the masses. Antibiotics has also become the first discipline to achieve major scientific and technological achievements after the founding of the New China. In the mid-1950s, the technical breakthrough in the localization of lactose substitutes marked the localization of the raw materials of the penicillin-producing culture medium, which paved the way for the industrialized production of penicillin with Chinese characteristics. Antibiotics have become one of the most widely used and affordable drugs for hundreds of millions of patients in China, and China has since ended the humiliating history of the “Sick Man of East Asia".     

何廉臣《感症宝筏》手校稿本述考

《感症宝筏》原名《伤寒指掌》,为清代医家吴贞所著,何廉臣重订,体现了清代中后期寒温思想的融合。该稿本为何廉臣出版该书时手校之底本,由其子抄录,内有多处校对、抄录笔迹及校改痕迹。从该稿本的抄写和体例、稿本与通行本之对比、该稿本中的修改符号等几个方面进行论述,探讨其学术与文物价值。     

海南地不容生物碱抑制肿瘤细胞增殖及构效关系解析

目的研究海南地不容(Stephania hainanensis H.S.Lo et Y.Tsoong)生物碱对人肝癌细胞Hep G-2、乳腺癌细胞MCF-7、胃癌细胞SGC-7901增殖的影响,筛选出有效的抗肿瘤化合物以及其敏感细胞株;分析其生物碱的构效关系。方法采用MTT法检测不同浓度的海南地不容生物碱对人肝癌细胞Hep G-2、乳腺癌细胞MCF-7、胃癌细胞SGC-7901增殖的抑制率;通过查阅国内外相关文献,分析海南地不容生物碱抗肿瘤活性的基本构效关系。结果MTT结果显示荷包牡丹碱、氧化克班宁、去甲荷包牡丹碱和克班宁对人肝癌Hep G-2、乳腺癌MCF-7和胃癌SGC-7901细胞的增值分别具有不同程度的剂量依赖性的抑制作用,各给药组分吸光度值与空白对照组比具有显著性差异(P<0.01),与阳性对照比较无明显统计学差异(P>0.05);海南地不容生物碱结构中的1,2-亚甲二氧基、N-亚甲基等取代基以及其化学结构的平面性对其抗肿瘤活性有重要影响。结论海南地不容中具有明显抗肿瘤作用的生物碱为荷包牡丹碱、氧化克班宁、去甲荷包牡丹碱和克班宁,其敏感细胞株均为乳腺癌细胞MCF-7;通过分析海南地不容生物碱的结构和抗肿瘤活性的关系,初步明确了其抗肿瘤活性可能与其结构易于抑制DNA拓扑异构酶和诱导细胞凋亡有关。     

柴胡加龙骨牡蛎汤联合腹针治疗脑卒中后抑郁疗效观察

目的:观察柴胡加龙骨牡蛎汤联合腹针治疗脑卒中后抑郁的临床疗效。方法:将94例失眠患者随机分为对照组和治疗组各47例,对照组采用氟哌噻吨美利曲辛片治疗,治疗组采用柴胡加龙骨牡蛎汤联合腹针治疗,两组均连续治疗6周后判定临床疗效,比较两组患者治疗前后汉密尔顿抑郁量表(HAMD)评分及Barthel指数(BI)变化。结果:两组患者治疗后HAMD评分较本组治疗前明显降低(P<0.05),BI评分较治疗前明显升高(P<0.05),且治疗组治疗后HAMD评分低于对照组(P<0.05),BI评分高于对照组(P<0.05)。两组患者治疗后中医证候积分与治疗前比较,差异有统计学意义(P<0.05);两组患者中医证候积分差值比较,差异有统计学意义(P<0.05)。结论:柴胡加龙骨牡蛎汤联合腹针治疗脑卒中后抑郁可改善患者抑郁症状。