牛膝多糖衍生物对糖尿病大鼠血糖及血脂的影响

 目的比较牛膝多糖及其硫酸酯和磷酸酯衍生物对糖尿病大鼠血糖和血脂的影响。方法以链脲佐菌素制备SD大鼠糖尿病模型,观察牛膝多糖(AbP)、牛膝多糖硫酸酯衍生物(S-AbP)和牛膝多糖磷酸酯衍生物(P-AbP)对糖尿病大鼠的体重、空腹血糖的变化以及血脂水平的影响。结果AbP及其两种衍生物均能显著降低糖尿病大鼠的血糖(P<0.05或P<0.01),且S-AbP的降糖效果优于AbP和消渴丸(P<0.05);S-AbP还能使糖尿病大鼠体重增加(P<0.01),血清总胆固醇(TC)、甘油三酯(TG)和低密度脂蛋白胆固醇(LDL-C)水平降低,高密度脂蛋白胆固醇(HDL-C)水平显著升高(均P<0.01);P-AbP使糖尿病大鼠体重增加(P<0.05),血清TG水平降低、HDL-C水平升高(P<0.05或P<0.01);AbP只能使糖尿病大鼠的HDL-C水平升高(P<0.05)。结论S-AbP和P-AbP均能使糖尿病大鼠体重增加,血糖、血脂水平降低,且S-AbP效果优于AbP,对糖尿病治疗及其并发症的控制有一定的作用。     

HPLC同时测定生物样品中新乌头碱、乌头碱、次乌头碱的含量

 目的建立同时测定血液、肝组织中新乌头碱(mesaconitine)、乌头碱(aconitine)、次乌头碱(hypaconitine)含量的HPLC分析方法。方法采用Welchrom C₁₈柱(4.6mm×250mm,5μm),以乙腈-0.03%四丁基氢氧化铵(用冰醋酸调至pH9.74)(58∶42)为流动相,流速为1.0mL·min^-1,检测波长为230nm。结果生物样品中新乌头碱在0.077～23mg·L^-1内线性关系良好(r=0.9998),乌头碱在0.083～25mg·L^-1内线性关系良好(r=0.9998),次乌头碱在0.08～24mg·L^-1内线性关系良好(r=0.9996)。生物样品中新乌头碱、乌头碱、次乌头碱的回收率不低于83.6%。生物样品中新乌头碱、乌头碱、次乌头碱的日内精密度和日间精密度分别在5.1%和9.3%以内。结论本方法简便、灵敏、准确,适用于血液、肝组织中新乌头碱、乌头碱、次乌头碱的分析。     

温莪术内生真菌的分离及其抗菌活性的初步研究

 目的研究温莪术内生真菌的种群组成及其代谢产物抗菌活性。方法采用内生菌常规分离法对健康温莪术植株体内的内生真菌进行了分离鉴定。以大肠杆菌、金黄色葡萄球菌、链球菌、沙门氏菌、巴氏杆菌为测试菌种,对温莪术根、茎、叶中分离的56株内生真菌进行抗菌活性筛选。结果经初步鉴定,这些内生真菌为5目、6科、24属;抑菌实验表明,56株内生真菌中有39株对5种测试菌均有不同程度的抑制作用。结论温莪术植物含有丰富多样的内生真菌,且多数内生真菌都表现为较高的抑菌活性。     

术前TAGM联合弹簧圈门静脉栓塞根治肝门胆管癌1例报告

正右侧侵犯为主的肝门胆管癌根治术多需要联合右半肝切除,可能会导致术后肝衰竭。近年来,计划性肝切除的策略备受关注,采用门静脉栓塞(portal vein embolization,PVE)的介入技术能诱导未来残余肝(future liver remnant,FLR)术前增生、降低肝衰风险~([1-3])。使用三丙烯酸酯明胶微球(tris-acryl gelatin microspheres,TAGM)作为末梢栓塞剂,联合近侧弹簧圈的PVE在国内鲜有报道。笔者单位1例尝试采用此技术治疗1例。报告如下。     

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??Objective    To explore the relationship between chronic periodontitis and cytokine interleukin-8 ??IL-8?? by literature review. Methods    The CNKI??Wanfang database??PubMed retrieval platform and Embase database were searched by computer. The research papers on the level of interleukin-8 in chronic periodontitis were collected. The retrieval time was up to 2016??screen literature according to the inclusion and exclusion criteria??use Stata12.0 software for meta analysis. Results    The level of IL-8 in gingival crevicular fluid in patients with chronic periodontitis was significantly higher than that in normal controls??P??0.05??. In the Asian population?? the level of IL-8 in gingival crevicular fluid in patients with chronic periodontitis was higher than that in normal controls??P??0.05??. In the western population??there was no difference in the level of IL-8 in gingival crevicular fluid between patients with chronic periodontitis and normal controls??P??0.05??. Conclusion    There is a significant difference in chemokines interleukin-8 between patients with chronic periodontitis and normal controls in the Asian population. Chemokines interleukin-8 may increase the risk of chronic periodontitis.     

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??Case analysis of conversion therapy by laparoscopic HIPEC combined with intraperitoneal and systemic chemotherapy for gastric cancer peritoneal metastasis XUE Kan*??LI Zi-yu??LI Shuang-xi??et al. * Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital & Institute, Beijing 100142, China
Corresponding author??LI Zi-yu??E-mail??ligregory@outlook.com
Abstract Objective To investigate the efficacy of laparoscopic hyperthermic intraperitoneal chemotherapy (HIPEC) combined intraperitoneal and systemic chemotherapy in gastric cancer patients with peritoneal metastasis. Methods A gastric cancer patient whose peritoneal cancer index was 39 during laparoscopic exploration was admitted at Peking University Cancer Hospital Gastrointestinal Center. The patient received laparoscopic HIPEC with docetaxel, followed by 6 courses of intraperitoneal and intravenous PTX??along with S-1 orally. Results CT scan showed distinct response during post-treatment evaluation. A second look by laparoscopy was suggested by MDT. No tumor cell was found in the lavage fluid through abdominocentesis and no metastasis can be seen by laparoscopic exploration. Then total gastrectomy plus D2 minus No.10 lymph node dissection was performed. The patient recovered smoothly after surgery. The pathology confirmed a ypT3N2M1, moderate to poor-differentiated adenocarcinoma, from gastric antrum to body. By September 2017, the patient was still in postoperative treatment. Conclusion Laparoscopic HIPEC combined with intraperitoneal and systemic chemotherapy showed effective interim results in gastric cancer peritoneal metastasis conversion therapy and is deserved for further researches.     

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??Value of preoperative lymphoscintigraphy in sentinel lymph node biopsy of breast cancer SUN Xiao*, LIU Juan-juan, WANG Yong-sheng, et al. *Breast Cancer Center, Shandong Cancer Hospital, Jinan 250117, China
Correcponding author: WANG Yong-sheng, E-mail: wangysh2008@yahoo.com.cn
Abstract Objectives Background Although preoperative lymphoscintigraphy for sentinel lymph nodes biopsy (SLNB) in breast cancer patients is undergone commonly, its clinical significance remains controversial. Methods Firstly, a database containing 716 consecutive breast cancer patients who received preoperative lymphoscintigraphy before SLNB was retrospectively analyzed. Secondly, 565 consecutive breast cancer patients were prospectively randomized into groups with or without preoperative lymphoscintigraphy before SLNB. Results In the retrospective study, sentinel lymph nodes (SLNs) were well imaged by lymphoscintigraphy in 86.6% patients, and negative lymphoscintigraphy results were associated with axillary node metastases. Failure of identification of SLNs by isotope alone was associated with whether axillary hot spot was imaged by lymphoscintigram (P<0.001). There were no significant differences in the false negative rate (P=0.731) of SLNB by isotope alone, in the identification rate (P=0.174) and the false negative rate (P=0.947) of SLNB by combination of dye and isotope between patients who had axillary hot spot in lymphoscintigram and those who had not. In the prospective study, 290 patients were randomized into the group with preoperative lymphoscintigraphy (82.1% patients were well imaged by lymphoscintigraphy) and 275 patients without. There were no significant differences between two groups in the identification rate (P=0.757) and the false negative rate (P=1.00) of SLNB by isotope alone, also in the identification rate (P=1.00) and the false negative rate (P=1.00) of SLNB by combination of dye and isotope. Conclusion Preoperative lymphoscintigraphy could not improve the identification rate and reduce the false negative rate of SLNB in breast cancer patients, and it is not a prerequisite for SLNB.