乳腺产生基质的癌

乳腺产生基质的癌(MPC)是一种少见的乳腺化生性癌组织学亚型,新版乳腺肿瘤WHO分类仅有小篇幅描述,国内外文献多为个案或小样本报道。MPC具有独特的形态学特征和免疫表型,但文献报道对预后颇有争议。在此着重就MPC的临床病理特征、免疫表型、诊断及鉴别诊断及预后方面研究进展作一概述。

血管内皮生长因子对内皮细胞产生基质金属蛋白酶2的影响

研究血管内皮生长因子对人脐静脉内皮细胞产生基质金属蛋白酶2的影响。用免疫组织化学染色方法和酶联免疫吸附测定法测定基质金属蛋白酶2的蛋白含量,明胶酶谱法检测基质金属蛋白酶2的活性。在基础条件下,内皮细胞自发产生基质金属蛋白酶2,在50μg/L血管内皮生长因子刺激下,基质金属蛋白酶2的产生显著增加(P<0.05),血管内皮生长因子浓度达到100μg/L时,基质金属蛋白酶2的产生进一步增加。与蛋白产生相一致,基质金属蛋白酶2分解明胶的活性也显著升高。血管内皮生长因子促进ECV304细胞产生基质金属蛋白酶2的作用可能与其促血管生成和增加血管通透性有关。

产生基质的化生性乳腺癌六例临床病理分析

目的产生基质的化生性乳腺癌(matrix-producing metaplastic carcinoma of the breast,MPMC)较罕见,病理形态非常特殊,容易导致误诊。本研究探讨MPMC临床病理学特征、诊断要点及鉴别诊断。方法收集2010-01-01-2016-01-01北京大学人民医院MPMC患者6例。患者均为女性,年龄42~73岁,中位年龄49岁。分析6例MPMC的临床特点,观察其组织病理学表现并进行免疫组化染色,同时复习相关文献资料。结果肿瘤呈结节状生长,部分区域呈浸润性生长方式。结节周围为大片上皮样巢团,中央为黏液软骨样基质,可见坏死。6例上皮样细胞团均为乳腺浸润性导管癌,4例组织学分级呈Ⅲ级改变,2例为Ⅱ级。免疫组化6例患者中有4例ER、PR和C-erbB-2阴性,1例ER阳性,1例C-erbB-2为+,6例CK5/6、S100、CK和Vimentin、EGFR阳性。另做组织化学染色AB-PAS,6例均为阳性。结论MPMC一种非常罕见的恶性肿瘤,诊断时需与叶状肿瘤等鉴别,免疫组化有助于鉴别诊断。

Effect of Chitinase-Producing Strain V-8 on Controlling Cotton Fusarium Wilt

[Objective] This study aimed to screen endophytic bacteria which is antag- onistic to cotton Fusarium wilt. [Method] Fresh cotton plants collected from cotton- growing areas in Jingzhou City, Hubei Province were used as experimental materials to isolate endophytic bacteria. Through chitinase test and co-culturing both micro-or- ganisms side by side on the same PDA culture plate, antagonistic strains to cotton Fusarium wilt were screened. [Result] A total of 83 bacterial isolates were obtained from cotton plants grown in the fields, six of which were chitinase-productive bacte- ria. Through chitinase test and co-culturing both micro-organisms side by side on the same PDA culture plate, strain V-8 which had the strongest antagonistic effect on Fusarium oxysporum f. sp. vasinfectum was screened. Strain V-8 had a wider anti- fungal spectrum with certain inhibitory effect on all the six important pathogenic fungi including Fusarium oxysporum f. sp niveum; it colonized stably in the rhizospheric soil of cotton, with a colonization density of up to 6.2x10s cfu/g fifty days after inoc- ulation; the relative effect on controlling cotton Fusarium wilt in pot test was 73.2%. The Findings of this study suggested that strain V-8 had great potential for biological control of cotton Fusarium wilt and could be taken as a substantial material for the cloning of chitinase genes. [Conclusion] The results from this study provides bases for the control of cotton fusarium wilt, as well as the exploitation of endophytic bac- teria resources in cotton and the development of novel biological pesticides.

Screening of a High Growth Influenza B Virus Strain in Vero Cells

Due to the insufficient supply of embryonated chicken eggs,the preparation of large quantities of inactivated influenza vaccines will require an alternative virus culture system after the emergence or reemergence of a pandemic influenza virus.The Vero cell is one of the ideal options since it was used for producing many kinds of human vaccines.However,most of the influenza viruses can not grow well in Vero cells.To develop a new influenza vaccine with Vero cells as a substrate,the virus needs to adapt to this cell substrate to maintain high growth characteristics.By serial passages in Vero cells,the B/Yunnan/2/2005va(B)strain was successfully adapted to Vero cells,with the hemagglutination titer(HAT)of the virus reaching 1:512.The high growth characteristic of this strain is stable up to 21 passages.The strain was identified by hemagglutination inhibition (HAI)test and sequencing respectively;the HA1 gene sequence of the virus was cloned and analyzed.The screening and establishment of high growth B virus provides an important tool for influenza vaccine production in Vero cells.

Macauba as Promising Substrate for Crude Oil and Biodiesel Production

The preparation of macauba fruits （Acrocomia aculeate （Jacq.） Lodd. ex Martius） both for oil extraction by continuous pressing and biodiesel production were investigated. The fruits and its pulp and kernel were characterized for their resulting oils. Experimental design was carried out to study the transesterification of each oil to obtain the concentrations of ethanol and catalyst that would provide the best biodiesel yield. A higher amount of biodiesel was produced from the best conditions to evaluate some characteristics as specified by ANP （National Agency of Petroleum, Natural Gas and Biofuels）. The results showed a variation in the fruits composition and different characteristics presented by the pulp and kernel oil. It was possible to define technological steps to obtain oil from the fruits of macauba and find the optimal conditions to biodiesel production, concentration of catalyst 4.42% and 5% and 13.3：1 and 9：1 ethanol：oil molar ratio to kernel oil and pulp oil, respectively.

Effect of Different Calcium Levels on Growth,Yield and Fruit Quality of Tomatoes in Substrate Culture

Tomato seedlings were grown in substrate culture with pots. The formulation of Holland Greenhouse Horticulture Research Institute was used(as CK) and the effects of different Ca concentrations(LCa, CK and HCa)on growth, yield, and fruit quality(protein, Vitamin C, nitrates, organic acid and soluble sugar) of tomato were studied keeping concentrations of other nutrients unchanged in the nutrient solution. The results showed that parameters related to the growth of tomato(plant height and Stem diameter), changes of tomato yield per plant and quality of tomato fruits were the highest when the plants were grown at 20% Ca treatments. In the second study, increased EC concentrations of nutrient solution resulted in stronger plants with improved yields and quality. Four different concentration gradients of nutrient solution treatment were designed based on the results of the first research stage(EC=1.5, 2.5, 3.5, 4.5 m S/cm, respectively). The single tomato plant had the highest production which is 2 268.994 g/plant, when the nutrient solution strength was at EC=1.5 m S cm, whereas they have the best fruit quality when the solution strength at EC 4.5 m S/cm. This suggests the need for wide popularization of the nutrient solution formula in large areas to improve the tomato production.

Influences of different substrates on simulated lignite biogas production

Using lignite samples, selected from Zhaotong basin, Yunnan province, China, as the parent source, simulating experiments of lignite biogas were conducted with 0.1% methanol, 5 mg/L yeast extract and 0.2 mol/L sodium acetate solutions as the exogenous substance respectively. Variation characteristics of gas production, gas composition, VFA content and activity of coenzyme 1：42o in the simulated process were analyzed to discuss the influence of different substrates on lignite biogas generation. The results show that 0.1% methanol and 5 mg/L yeast extract solutions increase VFA contents in the biogas generation system （p 〈 0.05） and inhibit coenzyme F420 and methanogen activities significantly, so they decrease both gas amounts （p 〈 0.05） and CH4 contents （p 〈 0.05）. 0.2 mol/L sodium acetate solution activates coenzyme F42o and methanogen activities and improves the efficiency of enzymatic reaction, so the gas quantity （p 〈 0.05） and the CH4 content （p 〈 0.01） increase significantly. Therefore, sodium acetate can be one kind of good exogenous substance for the generation of lignite biogenic gas.

Production of succinic acid in basket and mobile bed bioreactors-Comparative analysis of substrate mass transfer aspects

The glucose mass transfer in the biosynthesis of succinic acid with immobilized Actinobacillus succinogenes cells has been comparatively analyzed for a bioreactor with mobile bed vs. a stationary basket bioreactor. The process has been considered to occur under substrate and product inhibitory effects. The results indicated that the bioreactor with mobile bed is more efficient for biocatalyst particles with a diameter over 3 mm, while the basket bioreactor is more efficient for smaller biocatalyst particles and basket bed thickness below 5 mm. The performances of both configurations of immobilized A. succinogenes cell beds were found to be superior to the column packed bed bioreactor.

Optimizing the Interpretation of Sub-surface Resistivity in Relation with Borehole Productivity in Basement Area Applied to Seno Province （Burkina Faso）

This study aims at identifying possible correlations between shapes, types of geophysical anomalies and borehole productivity according to geological and hydrogeotogical contexts. The methodology adopted was a two-pronged one--the first step sought to： （1） interpret the electrical resistivity values from horizontal profiling and vertical electrical sounding implemented in Seno province that preceded the drilling of 513 boreholes; （ii） interpret data from pumping tests carried out on boreholes having a discharge superior to 1 m3/h （＂positive borehole＂） by using Cooper-Jacob＇s method. In the second step, according to geology, authors tried to identify possible correlations between each of the qualitative geophysical parameters： ~shape of anomaly〉〉, tttype of anomaly〉〉 and ~〈type curve〉〉 on the one hand, and hydrogeological parameters such as discharge, alteration thickness, transmissivity and saturated level on the other. The results of this study have shown that the chances of having a positive borehole in Seno province are higher when the type of anomaly is TCC （80%）, shape of anomaly is ＂W＂ and when type curve is ＂H＂ （80%） for all geological formations. Granitic formations are those that record higher discharges while schists record high transmissivity values.