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| 1 | An intracellular toxic protein (Xin) isolated from Xenorhabdus nematophilus strain BJ显示文摘An intracellular toxic protein, designated Xin and with remarkable inhibitory effect on growth of Helicoverpa armigera, was isolated from X. Nematophilus strain BJ by ion exchange chromatography and hydrophobic interaction chromatography. After placing neonates on the artificial diet containing Xin at concentration of 0 or 3.48μg/g for 7 days, the average weight of insects was 23.50mg and 0.55mg, respectively. The activity of Xin was lost by heating, freeze-drying, digestion with proteases or urea. The Xin molecular weight, over kD, was determined by gel filtration on Superose 12, and there were six component proteins analyzed by SDS-PAGE. The results show that Xin is a high molecular protein complex inhibiting growth of insect pest. | PAN Yinghong , JIAN Heng , ZHANG Jie , LIU Zheng, CHEN Zhongyi , YANG Xiufen, YANG Huaiwen and HUANG Dafang( State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China Institute of Biocontrol Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China Institute of Biotechnology Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China.) | 2002 | Progress in Natural Science:Materials International2002，12，4： | 9 |
| 2 | Effects of Meglumine Cyclic Adenylate Pretreatment on Systemic inflammatory Response Syndrome Induced by Lipopolysaccharide in Rats显示文摘Studies showed that the use of cyclic adenosine monophosphate(cAMP) substitutes or intracellular c AMP activators increased intracellular cAMP level, causing anti-inflammatory effects. This study was to investigate the effects of pretreatment with meglumine cyclic adenylate(MCA), a compound of meglumine and cAMP, on systemic inflammation induced by lipopolysaccharide(LPS) in rats. Eighteen adult male Sprague-Dawley rats were randomly divided into 3 groups(n=6 each): control group(NS group), LPS group(LPS group) and LPS with MCA pretreatment group(MCA group). Systemic inflammation was induced with LPS 10 mg/kg injected via the femoral vein in LPS and MCA groups. In MCA group, MCA 2 mg/kg was injected via the femoral vein 20 min before LPS injection, and the equal volume of normal saline was given in NS and LPS groups at the same time. Three hours after LPS injection, the blood samples were taken from the abdominal aorta for determination of plasma concentrations of TNF-α, IL-1, IL-6, IL-10, cAMP by ELISA and NF-κBp65 expression by Western blotting. The experimental results showed that inflammatory and antiinflammatory indices were increased in LPS group compared to NS group; inflammatory indices were declined and anti-inflammatory indices were increased in MCA group relative to LPS group. Our study suggested that MCA pretreatment may attenuate LPS-induced systemic inflammation. | 刘薇 陈璟莉 刘恒义 严虹 | 2017 | Journal of Huazhong University of Science and Technology(Medical Sciences)2017，37，3： | 7 |
| 3 | Intracellular chloride regulates the G_1/S cell cycle progression in gastric cancer cells显示文摘Recent studies show that ion channels/transporters play important roles in fundamental cellular functions. Several reports indicating the important roles of Cl- channels/transporters on cell proliferation suggest that the intracellular chloride concentration ([Cl-]i) regulated by them would be one of critical messengers. We investigated whether the [Cl-]i controls cell proliferation and cell cycle progression in human gastric cancer cells. Our studies indicated that furosemide, a blocker of Na+ /K+ /2Cl- cotransporter (NKCC), diminished cell growth by delaying the G1-S phase progression in gastric cancer cells with high expression and activity of NKCC. Furthermore, we found that the culture in the low Cl- medium (replacement of Cl- by NO3-) decreased the [Cl-]i and inhibited cell growth of gastric cancer cells and that this inhibition of cell growth was due to cell cycle arrest at the G0/G1 phase caused by diminutionof CDK2 and phosphorylated Rb. The culture of cells in the low Cl- medium significantly increased expressions of p21 mRNA and protein. In addition, the low Cl- medium induced phosphorylation of mitogen activated protein kinases (MAPKs). Treatment with an inhibitor of p38 or JNK significantly suppressed p21 upregulation caused by culture in a low Cl- medium and rescued gastric cancer cells from the low Cl- -induced G1 cell cycle arrest. These findings revealed that the [Cl-]i affects the cell proliferation via activation of MAPKs through upregulation of p21 in gastric cancer cells. Our results suggest that the [Cl-]i regulates important cellular functions in gastric cancer cells, leading to the development of novel therapeutic strategies. | Atsushi Shiozaki Eigo Otsuji Yoshinori Marunaka | 2011 | World Journal of Gastrointestinal Oncology2011，3，8： | 6 |
| 4 | Chloride intracellular channel 1 regulates colon cancer cell migration and invasion through ROS/ERK pathway显示文摘AIM:To investigate the mechanisms of chloride intracellular channel 1(CLIC1)in the metastasis of colon cancer under hypoxia-reoxygenation(H-R)conditions.METHODS:Fluorescent probes were used to detect reactive oxygen species(ROS)in LOVO cells.Wound healing assay and transwell assay were performed to examine the migration and invasion of LOVO cells.Expression of CLIC1 mRNA and protein,p-ERK,MMP-2and MMP-9 proteins was analyzed by reverse transcription-polymerase chain reaction and Western blot.METHODS:H-R treatment increased the intracellular ROS level in LOVO cells.The mRNA and protein expression of CLIC1 was elevated under H-R conditions.Functional inhibition of CLIC1 markedly decreased the H-R-enhanced ROS generation,cell migration,invasion and phosphorylation of ERK in treated LOVO cells.Additionally,the expression of MMP-2 and MMP-9 could be regulated by CLIC1-mediated ROS/ERK pathway.CONCLUSION:Our results suggest that CLIC1 protein is involved in the metastasis of colon cancer LOVO cells via regulating the ROS/ERK pathway in the H-R process. | Pan Wang Yun Zeng Tao Liu Chao Zhang Pei-Wu Yu Ying-Xue Hao Hua-Xin Luo Gang Liu | 2014 | World Journal of Gastroenterology2014，20，8： | 6 |
| 5 | Preferential binding between intracellular organic matters and Al_(13) polymer to enhance coagulation performance显示文摘Coagulation is the best available method for removing intracellular organic matter(IOM),which is released from algae cells and is an important precursor to disinfection by-products in drinking water treatment. To gain insight into the best strategy to optimize IOM removal, the coagulation performance of two Al salts, i.e., aluminum chloride(AlCl_3) and polyaluminum chloride(PACl, containing 81.2% Al_(13)), was investigated to illuminate the effect of Al species distribution on IOM removal. PACl showed better removal efficiency than AlCl_3 with regard to the removal of turbidity and dissolved organic carbon(DOC), owing to the higher charge neutralization effect and greater stability of pre-formed Al_(13) species. High pressure size exclusion chromatography analysis indicated that the superiority of PACl in DOC removal could be ascribed to the higher binding affinity between Al_(13) polymer and the low and medium molecular weight(MW) fractions of IOM. The results of differential log-transformed absorbance at 254 and 350 nm indicated more significant formation of complexes between AlCl_3 and IOM, which benefits the removal of tryptophan-like proteins thereafter. Additionally,PACl showed more significant superiority compared to AlCl_3 in the removal of <5 kD a and hydrophilic fractions, which are widely viewed as the most difficult to remove by coagulation.This study provides insight into the interactions between Al species and IOM, and advances the optimization of coagulation for the removal of IOM in eutrophic water. | Ruiping Liu Tingting Guo Min Ma Mingquan Yan Jing Qi Chengzhi Hu Gang Liu Huijuan Liu Jiuhui Qu Walter van der Meer | 2019 | Journal of Environmental Sciences2019，31，2： | 5 |
| 6 | One-dimensional microstructure-assisted intradermal and intracellular delivery显示文摘The advancement in the materials manufacturing at micrometer and nanometer scales has already enabled numerous applications in electronics, optics, chemistry, biology and medicine. Biomedical devices carrying micro-/nanostructures are currently being widely used in drug delivery, drug release, biosensing and therapy. New clinical methods for disease diagnosis and treatments are being developed enabled by nanotech no logy. One-dimensional (ID) structures are playi ng an importa nt role in the direct drug delivery both in vivo and ex vivo among various micro-/nanostructures. Here, in this paper, we reviewed recent progresses made on next-generation intradermal and intracellular delivery strategies and applications with focus on ID microstructure-based approaches. | Wensen Jiang Liang Ma Xiaobin Xu | 2019 | Bio-Design and Manufacturing2019，2，1： | 3 |
| 7 | Red carbon dots as label-free two-photon fluorescent nanoprobes for imaging of formaldehyde in living cells and zebrafishes显示文摘Direct,in situ selective detection of intracellular formaldehyde(FA)is of great significance for understanding its function in FA-related diseases.Herein,red carbon dots(RCD)are reported as label-free two-photon fluorescent nanoprobes for detecting and imaging of FA.Upon addition of FA,the-NH2 groups of RCD could quickly and specially react with aldehydes to form Schiff base and then the strong fluorescence of RCD with blue-shift emission is recovery due to the destruction of the hydrogen bond interaction between RCD and water.In addition,the nanoprobes exhibit outsta nding photo stability,rapid response(<1 min),high sensitivity(~9.9μmol/L)and excellent selectivity toward FA over other aldehyde group compounds.Notably,owing to the good cell-membrane permeability and biocompatibility,as well as the large two-photon absorption cross-section,the as-prepared RCD can be used as label-free nanoprobes for selectively detecting and imaging FA in living cells and zebrafishes through one-photon and two-photon excitation.Moreover,RCD could stain the tissue of zebrafishes at depths interval of up to 240μm under two-photon excitation.This research implied that RCD are promising tools for directly and in situ imaging FA in vivo,thus providing critical insights into FA-related pathophysiological processes. | Hong Wang Jing Wei Chonghua Zhang Yuan Zhang Yubin Zhang Lin Li Changmin Yu Peisheng Zhang Jian Chen | 2020 | Chinese Chemical Letters2020，31，3： | 3 |
| 8 | Response characteristics of an ascending auditory neuron AN3 and its projections in the brain of the bushcricket Gampsocleis grationsa显示文摘The phonotaxis of bushcrickets demonstrates that they have goodcapability of recognizing conspecific songs and locating the sound source,which bases on complicated auditory mechanisms of the central nervoussystem(CNS).This article describes the response characteristics of AN3,an auditory ascending neuron in the prothoracic ganglion,and its projec-tions within the brain.The AN3,with a quasi-tonic discharge pattern,has high sensitivity,directionality and ability to encode sound intensity.Therefore,it plays an important role in auditory information processingof CNS.Its projections in the brain are mainly concentrated in the lateralzone of the deutencephalon,where synaptically connecting local auditoryinterneurons in the brain. | GAO Panpan and SHEN Jun -Xian(Institute of Biophysics, Academia Sinica, Beijing 100080)The phonotaxis of bushcrickets demonstrates that they have good capability of recognizing conspecific songs and locating the sound source, which bases on complicated auditory mechanisms of the central nervous system (CNS). This article describes the response characteristics of AN3, an auditory ascending neuron in the prothoracic ganglion, and its projections within the brain. The AN3 , with a quasi-tonic discharge pattern, has high sensitivity, directionality and ability to encode sound intensity. Therefore, it plays an important role in auditory information processing of CNS. Its projections in the brain are mainly concentrated in the lateral zone of the deutencephalon, where synaptically connecting local auditory interneurons in the brain. | 1992 | Chinese Journal of Acoustics1992，11，1： | 3 |
| 9 | SciFinder-guided rational design of fluorescent carbon dots for ratiometric monitoring intracellular pH fluctuations under heat shock显示文摘Intracellular pH plays a significant role in various biological processes, including cell proliferation,apoptosis, metabolism, enzyme activity and homeostasis. In this work, a novel design strategy for the preparation of pH responsive carbon dots(CDs-pH) for ratiometric intracellular imaging was reported. By using SciFinder database, fluorescent CDs-pH with the required p Kavalue of 6.84 were rationally designed, which is vital important for precise sensing of intracellular pH. As a result, the synthesized CDspH demonstrated robust ability to test pH fluctuations within the physiological range of 5.4-7.4. The CDspH was further utilized for fluorescent ratiometric imaging of pH in living HeLa cells, effectively avoided the influence of autofluorescence from native cellular species. Moreover, real-time monitoring of intracellular pH fluctuation under heat shock was successfully realized. This SciFinder-guided design strategy is simple and flexible, which has a great potential to be used for the development of other types of CDs for various applications. | Haifang Liu Yuanqiang Sun Zhaohui Li Ran Yang Jie Yang Aaron Albert Aryee Xiaoge Zhang Jia Ge Lingbo Qu Yuehe Lin | 2019 | Chinese Chemical Letters2019，30，9： | 3 |
| 10 | Vacuoles of Candida yeast as a specialized niche for Helicobacter pylori显示文摘Helicobacter pylori(H.pylori)are resistant to hostile gastric environments and antibiotic therapy,reflecting the possibility that they are protected by an ecological niche,such as inside the vacuoles of human epithelial and immune cells.Candida yeast may also provide such an alternative niche,as fluorescently labeled H.pylori were observed as fast-moving and viable bacterium-like bodies inside the vacuoles of gastric,oral,vaginal and foodborne Candida yeasts.In addition,H.pylori-specific genes and proteins were detected in samples extracted from these yeasts.The H.pylori present within these yeasts produce peroxiredoxin and thiol peroxidase,providing the ability to detoxify oxygen metabolites formed in immune cells.Furthermore,these bacteria produce urease and VacA,two virulence determinants of H.pylori that influence phago-lysosome fusion and bacterial survival in macrophages.Microscopic observations of H.pylori cells in new generations of yeasts along with amplification of H.pylori-specific genes from consecutive generations indicate that new yeasts can inherit the intracellular H.pylori as part of their vacuolar content.Accordingly,it is proposed that yeast vacuoles serve as a sophisticated niche that protects H.pylori against the environmental stresses and provides essential nutrients,including ergosterol,for its growth and multiplication.This intracellular establishment inside the yeast vacuole likely occurred long ago,leading to the adaptation of H.pylori to persist in phagocytic cells.The presence of these bacteria within yeasts,including foodborne yeasts,along with the vertical transmission of yeasts from mother to neonate,provide explanations for the persistence and propagation of H.pylori in the human population.This Topic Highlight reviews and discusses recent evidence regarding the evolutionary adaptation of H.pylori to thrive in host cell vacuoles. | Farideh Siavoshi Parastoo Saniee | 2014 | World Journal of Gastroenterology2014，20，18： | 3 |
| 11 | Effect of Lipoxin A_4 on IL-1β Production of Monocytes and Its Possible Mechanism in Severe Preeclampsia显示文摘This study examined in vitro effect of lipoxin A 4 (LXA 4) on interleukin-1β (IL-1β) production of monocytes and its possible mechanism in severe preeclampsia (PE).Peripheral venous blood was drawn from 15 patients with severe preeclampsia (PE group) and 20 normal pregnant women (control group) to prepare monocytes which were then treated with LXA 4 at different concentrations of 0,10,100 nmol/L respectively.IL-1β level in the supernatant of monocytes was detected by enzyme linked immunoassay.The [Ca 2+ ] i of monocytes was measured by laser scanning confocal microscopy.The results showed that the IL-1β level and the [Ca 2+ ] i of monocytes in the PE group were significantly higher than those in the control group.LXA 4 significantly decreased the generation of IL-1β in a dose-dependent manner in the PE group.After treatment with 100-nmol/L LXA 4,in the PE group,the [Ca 2+ ] i concentration of monocytes was significantly reduced.It was concluded that LXA 4 may inhibit the IL-1β production of monocytes from severe preeclampsia women by inhibiting extracellular calcium influx. | 王建芳 黄引平 黄艳君 周洁 刘小利 | 2010 | Journal of Huazhong University of Science and Technology(Medical Sciences)2010，30，6： | 3 |
| 12 | Endothelin-1 induces intracellular [Ca^(2+)] increase via Ca^(2+) influx through the L-type Ca^(2+) channel, Ca^(2+)-induced Ca^(2+) release and a pathway involving ET_A receptors, PKC, PKA and AT1 receptors in cardiomyocytes显示文摘Using fura-2-acetoxymethyl ester (AM) fluorescence imaging and patch clamp techniques, we found that endothelin-1 (ET-1) significantly elevated the intracellular calcium level ([Ca2+]i) in a dose-dependent manner and activated the L-type Ca2+ channel in cardiomyocytes isolated from rats. The effect of ET-1 on [Ca2+]i elevation was abolished in the presence of the ETA receptor blocker BQ123, but was not affected by the ETB receptor blocker BQ788. ET-1-induced an increase in [Ca2+]i, which was inhibited 46.7% by pretreatment with a high concentration of ryanodine (10 μmol/L), a blocker of the ryanodine receptor. The ET-1-induced [Ca2+]i increase was also inhibited by the inhibitors of protein kinase A (PKA), protein kinase C (PKC) and angiotensin type 1 receptor (AT1 receptor). We found that ET-1 induced an enhancement of the amplitude of the whole cell L-type Ca2+ channel current and an increase of open-state probability (NPo) of an L-type single Ca2+ channel. BQ123 completely blocked the ET-1-induced increase in calcium channel open-state probability. In this study we demonstrated that ET-1 regulates calcium overload through a series of mechanisms that include L-type Ca2+ channel activation and Ca2+-induced Ca2+ release (CICR). ETA receptors, PKC, PKA and AT1 receptors may also contribute to this pathway. | ZENG QingHua1, LI XingTing1, ZHONG GuoGan2, ZHANG WenJie2 & SUN ChengWen3 1 Laboratory of Molecular & Cellular Physiology, School of Life Sciences, Northeast Normal University, Changchun 130024, China 2 Department of Physiology, School of Basic Medical Sciences, Jilin University, Changchun 130021, China 3 Department of Pharmaceutical Sciences, North Dakota State University, Fargo, NorthDakota, USA | 2009 | Science China(Life Sciences)2009，52，4： | 2 |
| 13 | Update on vascular endothelial Ca^(2+) signalling:A tale of ion channels,pumps and transporters显示文摘A monolayer of endothelial cells (ECs) lines the lumen of blood vessels and forms a multifunctional transducing organ that mediates a plethora of cardiovascular processes. The activation of ECs from as state of quiescence is, therefore, regarded among the early events leading to the onset and progression of potentially lethal diseases, such as hypertension, myocardial infarction, brain stroke, and tumor. Intracellular Ca2+ signals have long been know to play a central role in the complex network of signaling pathways regulating the endothelial functions. Notably, recent work has outlined how any change in the pattern of expression of endothelial channels, transporters and pumps involved in the modulation of intracellular Ca2+ levels may dramatically affect whole body homeostasis. Vascular ECs may react to both mechanical and chemical stimuli by generating a variety of intracellular Ca2+ signals, ranging from brief, localized Ca2+ pulses to prolonged Ca2+ oscillations engulfing the whole cytoplasm. The well-defined spatiotemporal profile of the subcellular Ca2+ signals elicited in ECs by specific extracellular inputs depends on the interaction between Ca2+ releasing channels, which arelocated both on the plasma membrane and in a number of intracellular organelles, and Ca2+ removing systems. The present article aims to summarize both the past and recent literature in the field to provide a clear-cut picture of our current knowledge on the molecular nature and the role played by the components of the Ca2+ machinery in vascular ECs under both physiological and pathological conditions. | Francesco Moccia Roberto Berra-Romani Franco Tanzi | 2012 | World Journal of Biological Chemistry2012，3，7： | 2 |
| 14 | PHYSIOLOGICAL CHANGES OF PHOTORECEPTOR OF BUSH CRICKET COMPOUND EYES AS A FUNCTION OF TIME AND ADAPTATION STATE显示文摘Retinula cell responses were recorded from the compound eyes of the bush cricket with the intracellular electrode recording method at different adaptation states(light-and darkadapted states)during a 24-h period(day and night times). We investigated the angular, spectral, polarizable and absolute sensitivities as well as the time course of the adaptation changes of the retinula cell in the side region of the compound eyes of the bush cricket, on which no report has been seen. | 吴卫国 吴梅英 E.J.WARRANT 徐智敏 石淑珍 王翔 高奔 张少吾 | 1990 | Chinese Science Bulletin1990，35，15： | 2 |
| 15 | ETM study of electroporation influence on cell morphology in human malignant melanoma and human primary gingival fibroblast cells显示文摘Objective:To estimate electroporation(EP) influence on malignant and normal cells.Methods: Two cell lines including human malignant melanoma(Me-43) and normal human gingival fibroblast(HCFs) were used.EP parameters were the following:230,1000,1 730,2 300 V/cm;30 μ s by 3 impulses for every case.The viability of cells after EP was estimated by MTT assay. The ullrastructural analysis was observed by transmission electron microscope(Zeiss EM 900). Results:In the current study we observed the intracellular effect following EP on Me-43 and HGF cells.At the conditions applied,we did not observe any significant damage of mitochondrial activity in both cell lines treated by EP.Conversely,we showed that EP in some conditions can stimulate cells to proliferation.Some changes induced by EP were only visible in electron microscopy.In fibroblast cells we observed significant changes in lower parameters of EP(230 and 1 000 V/cm).After applying higher electric field intensities(2 300 V/cm) we detected many vacuoles,myelin-like bodies and swallowed endoplasmic reticulum.In melanoma cells such strong pathological modifications after EP were not observed,in comparison with control cells. The ultrastructure of both treated cell lines was changed according to the applied parameters of EP.Conclusions:We can claim that EP conditions are cell line dependent.In terms of the intracellular morphology,human fibroblasts are more sensitive to electric field as compared with melanoma cells.Optimal conditions should be determined for each cell line.Summarizing our study,we can conclude that EP is not an invasive method for human normal and malignant cells. This technique can be safely applied in chemotherapy for delivering drugs into tumor cells. | Nina Skolucka Malgorzata Daczewska Jolanta Saczko Agnieszka Chwilkowska Anna Choromanska Malgorzata Kotulska Iwona Kaminska Julita Kulbacka | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，2： | 2 |
| 16 | Research of the relationship of intracellular acidification and apoptosis in Hela cells based on pH nanosensors显示文摘In this paper,the relationship of intracellular acidification and apoptosis in Hela cells induced by vin-cristine sulfate has been studied by use of the ratiometric pH nanosensors that have been developed by our group,employing fluorescein isothiocyanate(FITC) doped as the pH-sensitive dye and Tris(2,2'-bipyidyl) dichlororuthenium(II) hexahydrate(RuBpy) doped as reference dye. The pH change of the Hela cells induced by vincristine sulfate has been monitored in vivo,in situ and real time by use of the ratiometric pH nanosensors. The experimental results show that the pH of the apoptotic Hela cells induced by vincristine sulfate has been acidified from 7.11 to 6.51,and the percentage of intra-cellular acidification is correlated with the induced concentration and incubation time of the vincristine sulfate. The further study of the percentage of intracellular acidification and the percentage of apop-tosis of Hela cells at the same time reveals that apoptosis of Hela cells induced by vincristine sulfate is preceded by intracellular acidification. These results would provide theoretical foundation for the therapy of cancer through interfering the pH of cells by use of vincristine sulfate or other anti-cancer drugs. | HE XiaoXiao WANG Yan WANG KeMin PENG JiaoFeng LIU Fang TAN WeiHong | 2007 | Science China Chemistry2007，50，2： | 2 |
| 17 | HERBAL MEDICINE 960 RECIPE REVERSES THE MALIGNANT PHENOTYPES OF HUMAN HEPATOCELLULAR CARCINOMA SMMC7721 CELLS显示文摘To investigate the effect and mechanism of herbal medicine 960 recipe(960) on reversing the malignant phenotypes of human hepatocellular car-cinoma(HCC) SMMC7721 cells.Methods SMMC7721 cells were maintained by the 960-containing serum derived from rats who had been administered orally with 960 recipe. Cell vitality was detected by MTT assay. The abilities of albumin and alpha fetal protein (AFP) secretion were determined by enzyme linked immunosorbent assay (ELISA). cAMP and cGMP were detected with 125I-cAMP and 125 I-cGMP radioimmune methods, and telomerase activities were assessed using the telomerase PCR ELISA.Results After treated with 960 containing serum, the cell vitality reduced by 30. 7% for 12h, 40.3% for 24h, 56.9% for 48h and 67.7% for 72h; the abilities of albumin secretion enhanced especially on day 6, it increased by 24.5% compared with that of control group; and AFP reduced 62. 5%, significantly lower than that of control; the intracellular cAMP level was elevated, and telomerase | 王昌俊 李建军 | 2003 | China Medical Abstracts(Internal Medicine)2003，20，2： | 2 |
| 18 | 人单核-巨噬细胞和中性粒细胞杀灭问号钩端螺旋体能力差异及其机制显示文摘目的 了解人单核-巨噬细胞和中性粒细胞杀灭问号钩端螺旋体(简称钩体)能力差异及其机制.方法 人THP-1单核细胞和HL-60细胞分别用佛波酯(PMA)和全反式维甲酸(ATRA)预处理,使其分化为单核-巨噬细胞和中性粒细胞.采用激光共聚焦显微镜法检测问号钩体黄疸出血群赖型赖株感染THP-1单核-巨噬细胞和HL-60中性粒细胞内总活性氧(ROS)、一氧化氮(NO)水平和游离钙离子浓度([Ca2+]i)变化.采用荧光分光光度法检测总ROS、NO抑制剂和胞内游离Ca2+螯合剂(NAC、SMT和BAPTA/AM)作用前后THP-1单核-巨噬细胞和HL-60中性粒细胞杀灭胞内问号钩体的能力及其差异.结果 THP-1单核-巨噬细胞和HL-60中性粒细胞感染问号钩体后总ROS、NO水平和[Ca2+]i均显著升高(P〈0.05),但前者总ROS、NO水平和[Ca2+]i显著高于后者(P〈0.05).THP-1单核-巨噬细胞杀灭胞内问号钩体能力显著强于HL-60中性粒细胞(P〈0.05).抑制胞内总ROS、NO和游离Ca2+可导致THP-1单核-巨噬细胞杀灭胞内问号钩体能力显著下降(P〈0.05),但对HL-60中性粒细胞无明显影响.结论 单核-巨噬细胞而非中性粒细胞是感染时清除问号钩体的主要吞噬细胞,高水平总ROS、NO和胞内游离Ca2+与单核-巨噬细胞杀灭问号钩体能力密切相关. | 阮萍 林旭瑷 张颖颖 周海丽 严杰 陈旭 | 2017 | 中华微生物学和免疫学杂志2017，37，6： | 2 |
| 19 | The universality and biological significance of signal molecules with intracellular-extracellular compatible functions显示文摘Generally, cell signal molecules are classified into the extracellular signal molecules (the first messengers) and the intracellular signal ones (the second messengers). Cyclic adenosine monophosphate (cAMP), calcium ions and calmodulin (CaM) are the traditional intracellular messengers, but they are also present in extracellular matrix (ECM). Some of them have been discovered to act as the first messengers through cell surface receptors. Other second messengers, such as cyclic guanosine monophosphate (cGMP), cyclic adenosine diphosphate ribose (cADPR) and annexin, are also found existing outside animal and plant cells. The existence of these messengers with intracellular-extracellular compatible functions in cells may be a regular biological phenomenon. These compatible messengers might be the communication factors between intracellular and extracellular regions or among the cell populations, and are also important in regulating cell development procedure. | SUN DayeInstitute of Molecular Cell Biology, Hebei Normal University, Shijiazhuang 050016, China | 2000 | Chinese Science Bulletin2000，45，19： | 2 |
| 20 | NUMB enhances Notch signaling by repressing ubiquitination of NOTCH1 intracellular domain显示文摘The release and nuclear translocation of the intracellular domain of Notch receptor(NICD)is the prerequisite for Notch signaling-mediated transcriptional activation.NICD is subjected to various posttranslational modifications including ubiquitination.Here,we surprisingly found that NUMB proteins stabilize the intracellular domain of NOTCH1 receptor(N1ICD)by regulating the ubiquitin–proteasome machinery,which is independent of NUMB’s role in modulating endocytosis.BAP1,a deubiquitinating enzyme(DUB),was further identified as a positive N1ICD regulator,and NUMB facilitates the association between N1ICD and BAP1 to stabilize N1ICD.Intriguingly,BAP1 stabilizes N1ICD independent of its DUB activity but relying on the BRCA1-inhibiting function.BAP1 strengthens Notch signaling and maintains stem-like properties of cortical neural progenitor cells.Thus,NUMB enhances Notch signaling by regulating the ubiquitinating activity of the BAP1–BRCA1 complex. | Zhiyuan Luo Lili Mu Yue Zheng Wenchen Shen Jiali Li Lichao Xu Bo Zhong Ying Liu Yan Zhou | 2020 | Journal of Molecular Cell Biology2020，12，5： | 2 |
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