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Effects of small interfering RNA inhibit Class Ⅰ phosphoinositide 3-kinase on human gastric cancer cells

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World Journal of Gastroenterology 2013年第11期19卷 1760-1769页

作者： bao-song zhu Li-Yan Yu Kui Zhao Yong-You Wu Xiao-Li Cheng Yong Wu Feng-Yun Zhong Wei Gong Qiang Chen Chun-Gen Xing Department of General Surgery The Second Affiliated HospitalSoochow University Department of Gastroenterology Qianfoshan HospitalShandong University

AIM: To investigate the effects of small interfering RNA (siRNA)-mediated inhibition of Class?I?phosphoinositide 3-kinase (Class?I?PI3K) signal transduction on the proliferation, apoptosis, and autophagy of gastric cancer SGC7901 and MGC803 cells.METHODS: We constructed the recombinant replication adenovirus PI3K(I)-RNA interference (RNAi)-green fluorescent protein (GFP) and control adenovirus NC-RNAi-GFP, and infected it into human gastric cancer cells. MTT assay was used to determine the growth rate of the gastric cancer cells. Activation of autophagy was monitored with monodansylcadaverine (MDC) staining after adenovirus PI3K(I)-RNAi-GFP and control adenovirus NC-RNAi-GFP treatment. Immunofluorescence staining was used to detect the expression of microtubule-associated protein 1 light chain 3 (LC3). Mitochondrial membrane potential was measured using the fluorescent probe JC-1. The expression of autophagy was monitored with MDC, LC3 staining, and transmission electron microscopy. Western blotting was used to detect p53, Beclin-1, Bcl-2, and LC3 protein expression in the culture supernatant.RESULTS: The viability of gastric cancer cells was inhibited after siRNA targeting to the Class?I?PI3K blocked Class?I?PI3K signal pathway. MTT assays revealed that, after SGC7901 cancer cells were treated with adenovirus PI3K(I)-RNAi-GFP, the rate of inhibition reached 27.48% ± 2.71% at 24 h, 41.92% ± 2.02% at 48 h, and 50.85% ± 0.91% at 72 h. After MGC803 cancer cells were treated with adenovirus PI3K(I)-RNAi-GFP, the rate of inhibition reached 24.39% ± 0.93% at 24 h, 47.00% ± 0.87% at 48 h, and 70.30% ± 0.86% at 72 h (P < 0.05 compared to control group). It was determined that when 50 MOI, the transfection efficiency was 95% ± 2.4%. Adenovirus PI3K(I)-RNAi-GFP (50 MOI) induced mitochondrial dysfunction and activated cell apoptosis in SGC7901 cells, and the results described here prove that RNAi of Class?I?PI3K induced apoptosis in SGC7901 cells. The results showed that a

关键词： Gastric cancer cells Class I phosphoinositide 3-kinase RNA interference Apoptosis Autophagy

Blocking NF-kB nuclear translocation leads to p53-related autophagy activation and cell apoptosis

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World Journal of Gastroenterology 2011年第4期17卷 478-487页

作者： bao-song zhu Chun-Gen Xing Fang Lin xiao-Qing Fan Kui Zhao Zheng-Hong Qin Department ofGeneral Surgery The Second Affiliated Hospital Soochow University Suzhou 215006 Jiangsu Province China Laboratory of Aging and Nervous Diseases Soochow University School of Medicine Suzhou215123 Jiangsu Province China Department of General Surgery The Second Hospital Of Jiaxing City Jiaxing 314000 Jiangsu ProvinceChina

AIM: To investigate the anti-tumor effects of nuclear factor-κB (NF-κB) inhibitor SN50 and related mechanisms of SGC7901 human gastric carcinoma cells. METHODS: MTT assay was used to determine the cytotoxic effects of SN50 in gastric cancer cell line SGC7901. Hoechst 33258 staining was used to detect apoptosis morphological changes after SN50 treatment. Activation of autophagy was monitored with monodansylcadaverine (MDC) staining after SN50 *** staining was used to detect the expression of light chain 3 (LC3). Mitochondrial membrane potential was measured using the fluorescent probe JC-1. Western blotting analysis were used to determine the expression of proteins involved in apoptosis and autophagy including p53, p53 upregulated modulator of apoptosis (PUMA), damage-regulated autophagy modulator (DRAM), LC3 and Beclin 1. We detected the effects of p53-mediated autophagy activation on the apoptosis of SGC7901 cells with the p53 inhibitor pifithrin-α. RESULTS: The viability of SGC7901 cells was inhibited after SN50 treatment. Inductions in the expression of apoptotic protein p53 and PUMA as well as autophagic protein DRAM, LC3 and Beclin 1 were detected with Western blotting analysis. SN50-treated cells exhibited punctuate microtubule-associated protein 1 LC3 in immunoreactivity and MDC-labeled vesicles increased after treatment of SN50 by MDC staining. Collapse of mitochondrial membrane potential Δψ were detected for 6 to 24 h after SN50 treatment. SN50-induced increases in PUMA, DRAM, LC3 and Beclin 1 and cell death were blocked by the p53 specific inhibitor pifithrin-α. CONCLUSION: The anti-tumor activity of NF-κB inhibitors is associated with p53-mediated activation of autophagy.

关键词： Nuclear factor-κB SN50 Autophagy P53 Cell apoptosis

Effects of LY294002 on the invasiveness of human gastric cancer in vivo in nude mice

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World Journal of Gastroenterology 2009年第40期15卷 5044-5052页

作者： Chun-Gen Xing bao-song zhu Xiao-Qing Fan Hui-Hui Liu Xun Hou Kui Zhao Zheng-Hong Qin Department of General Surgery The Second Affiliated Hospital Soochow University Suzhou 215006 Jiangsu Province China Department of General Surgery The Second Hospital of Jiaxing City Jiaxing 314000 Jiangsu Province China Department of Neurology The Second Affiliated Hospital Soochow University Suzhou 215006 Jiangsu Province China Laboratory of Aging and Nervous Diseases Soochow University School of Medicine Suzhou 215123 Jiangsu Province China

AIM: To investigate the effects of class phosphatidy-linositol 3-kinase (PI3K) inhibitor LY294002 on the invasiveness and related mechanisms of implanted tumors of SGC7901 human gastric carcinoma cells in nude mice. METHODS: Nude mice were randomly divided into model control groups and LY294002 treatment groups. On days 5, 10 and 15 after treatment, the inhibitory rate of tumor growth, pathological changes in tumor specimens, expression levels of matrix metalloproteinase (MMP)-2, MMP-9, CD34 [representing microvessel density (MVD)] and vascular endothelial growth factor (VEGF), as well as apoptosis indexes in tumor samples were ***: In this study, we showed that treatingthe tumors with LY294002 could significantly inhibit carcinoma growth by 11.3%, 29.4% and 36.7%, after 5, 10 and 15 d, respectively, compared to the control group. Hematoxylin & eosin staining indicated that the rate of inhibition increased progressively (23.51% ± 3.11%, 43.20% ± 3.27% and 63.28% ± 2.10% at 5, 10 and 15 d, respectively) along with apoptosis. The expression of MMP-2 was also downregulated (from 71.4% ± 1.6% to 47.9% ± 0.7%, 31.9% ± 0.9% and 7.9% ± 0.7%). The same effects were observed in MMP-9 protein expression (from 49.4% ± 1.5% to 36.9% ± 0.4%, 23.5% ± 0.9% and 7.7% ± 0.6%), the mean MVD (from 51.2% ± 3.1% to 41.9% ± 1.5%, 30.9% ± 1.7% and 14.9% ± 0.8%), and the expression of VEGF (from 47.2% ± 3.1% to 25.9% ± 0.5%, 18.6% ± 1.2% and 5.1% ± 0.9%) by immunohistochemical ***: The classPI3K inhibitor LY294002could inhibit the invasiveness of gastric cancer cells by downregulating the expression of MMP-2, MMP-9, and VEGF, and reducing MVD.

关键词： Phosphatidylinositol 3-kinase LY294002 Gastric cancer Neoplasm invasiveness

Impacts of the annual cycle of background SST in the tropical Pacific on the phase and amplitude of ENSO

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 12-17页

作者： song Jiang Congwen zhu Ning Jiang State Key Laboratory of Severe Weather(LASW) Chinese Academy of Meteorological SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The dominant annual cycle of sea surface temperature(SST)in the tropical Pacific exhibits an antisymmetric mode,which explains 83.4%total variance,and serves as a background of El Niño-Southern Oscillation(ENSO).However,there is no consensus yet on its anomalous impacts on the phase and amplitude of *** on data during 1982-2022,results show that anomalies of the antisymmetric mode can affect the evolution of ENSO on the interannual scale via Bjerknes feedback,in which the positive(negative)phase of the antisymmetric mode can strengthen El Niño(La Niña)in boreal winter via an earlier(delayed)seasonal cycle transition and larger(smaller)annual *** magnitude of the SST anomalies in the equatorial eastern Pacific can reach more than±0.3◦C,regulated by the changes in the antisymmetric mode based on random sensitivity *** reveal the spatial pattern of the annual cycle associated with the seasonal phase-locking of ENSO evolution and provide new insight into the impact of the annual cycle of background SST on ENSO,which possibly carries important implications for forecasting ENSO.

关键词： Annual cycle SST anomaly Antisymmetric mode ENSO

芪杉胶囊联合化疗治疗晚期非小细胞肺癌的临床疗效观察

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中国中医基础医学杂志 2017年第3期23卷 359-361页

作者：姜家康迟文成马宝柱宋立佳黑龙江中医药大学哈尔滨150040

目的:观察芪杉胶囊联合化疗治疗晚期非小细胞肺癌的临床观察效果。方法:将98例符合标准的患者按随机数字表法分为对照组和治疗组各49例,治疗3个月后观察2组瘤灶近期疗效、中医证候改善情况及化疗毒副反应发生率。结果:治疗组瘤灶近期疗... 详细信息

目的:观察芪杉胶囊联合化疗治疗晚期非小细胞肺癌的临床观察效果。方法:将98例符合标准的患者按随机数字表法分为对照组和治疗组各49例,治疗3个月后观察2组瘤灶近期疗效、中医证候改善情况及化疗毒副反应发生率。结果:治疗组瘤灶近期疗效缓解率38.78%,对照组32.65%,差异有统计学意义;治疗组中医证候改善情况87.75%,对照组65.31%,差异有统计学意义;在化疗引起的白细胞减少、血小板下降、肝肾功能损害、恶心呕吐以及神经毒性方面,治疗组发生率明显减少,差异有统计学意义。结论:芪杉胶囊联合化疗治疗晚期非小细胞肺癌能显著改善患者气阴两虚证候,降低化疗所致的严重不良反应,提高患者生活质量,同时对缩小瘤灶有一定的治疗作用。

关键词：晚期肺癌芪杉胶囊气阴两虚证化疗临床观察

Modification of Maxwell model for conductivity prediction of carbon nanotubes-filled polymer composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longyuan LI Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical conductivity. This paper presents a modified Maxwell model to evaluate the electrical conductivity of CNTs-filled polymer composites by introducing a transition zone to account for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer composite is modeled as a three-phase composite, consisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity(EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix, inclusions, and transition zone. The model's validity is confirmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear conductivity behavior observed in CNTs-polymer composites. This study offers valuable insights into the design of high-performance conductive polymer nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed polymer composites.

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Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying zhu Hesong Wang Anzhi Zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

Update on Mayer—Rokitansky—Küster—Hauser syndrome

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Frontiers of Medicine 2022年第6期16卷 859-872页

作者： Na Chen Shuang song Xinmiao bao Lan zhu National Clinical Research Center for Obstetric and Gynecologic Diseases Department of Obstetrics and GynecologyState Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalPeking Union Medical College and Chinese Academy of Medical SciencesBeijing100730China Peking Union Medical College M.D.ProgramBeijing100730China

This review presents an update of Mayer—Rokitansky—Küster—Hauser(MRKH)syndrome on its etiologic,clinical,diagnostic,psychological,therapeutic,and reproductive *** etiology of MRKH syndrome remains unclear due to its intrinsic *** and genetic causes that may interact during the embryonic development have been proposed with no definitive etiopathogenesis *** proportion of concomitant extragenital malformations varies in different studies,and the discrepancies may be explained by ethnic *** addition to physical examination and pelvic ultrasound,the performance of pelvic magnetic resonance imaging is crucial in detecting the presence of rudimentary uterine *** syndrome has long-lasting psychological effects on patients,resulting in low esteem,poor coping strategies,depression,and anxiety *** psychological counseling and peer support to diagnosed patients is *** and timely psychological intervention could significantly improve a patient’s *** nonsurgical and surgical methods have been suggested for treatment of MRKH *** to the high success rate and minimal risk of complications,vaginal dilation has been proven to be the first-line *** is the second-line option for patients experiencing dilation *** transplantation and gestational surrogacy are options for women with MRKH syndrome to achieve biological motherhood.

关键词： MRKH(Mayer-Rokitansky-Küster-Hauser)syndrome etiology clinical characteristic diagnosis treatment psychological effect

“Slope-adsorption & plateau-pore filling” mechanism unlocking the potential of hard carbon anodes for “fast-charging & large-sized”batteries

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Science China Materials 2025年第1期 309-311页

作者： Tian Liang Xiaoming zhu Hubei Key Laboratory of Radiation Chemistry and Functional Materials School of Nuclear Technology and Chemistry & Biology Hubei University of Science and Technology

To date, there has been no report on fast-charging and Ahlevel sodium-ion batteries (SIBs) by utilizing thick hard carbon anodes that demonstrate prolonged cycling life and high areal capacity at high rates. Further, the relationship among the complex structure of hard carbon, storage mechanism, and fastcharging performance in alkali-metal ion batteries has been a subject of ongoing debate [1,2].

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