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New Antibacterial Dihydropyrones Induced by Co-Culture of Penicillium crustosum PRB-2 and Penicillium citrinum HDN11-186
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作者 YU Guihong ZHOU Luning +1 位作者 WU Guangwei LI Dehai 《Journal of Ocean University of China》 CAS CSCD 2024年第1期216-220,共5页
Two new dihydropyrones,rhytismatones C(1)and D(2),and a known compound,penicillenol A1(3),were isolated from the co-culture broth of the deep-sea-derived fungus Penicillium crustosum PRB-2 and Suaeda salsa-derived end... Two new dihydropyrones,rhytismatones C(1)and D(2),and a known compound,penicillenol A1(3),were isolated from the co-culture broth of the deep-sea-derived fungus Penicillium crustosum PRB-2 and Suaeda salsa-derived endophytic fungus Peni-cillium citrinum HDN11-186.Their structures were elucidated through comprehensive analysis of nuclear magnetic resonance(NMR)spectra and mass spectra.The absolute configurations of new compounds were determined by calculating the electronic circular di-chroism(ECD)spectrum.UPLC-MS data showed that compounds 1–3 could only be detected in the media of co-culture,suggesting new biosynthetic pathways were activated in the co-cultured fungi.Compound 1 showed obvious antibacterial activities against Pro-teus sp.MMBC-1002 and Bacillus subtilis MMBC-1004 with minimum inhibitory concentration(MIC)both at 25μmolL^(-1). 展开更多
关键词 co-culture Penicillium crustosum Penicillium citrinum dihydropyrones antibacterial activity
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“Co-culture Engineering”for Enhanced Phytoremediation of Metal Contaminated Soils 被引量:15
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作者 NICai-Ying SHIJi-Yan +1 位作者 LUOYong-Ming CHENYing-Xu 《Pedosphere》 SCIE CAS CSCD 2004年第4期475-482,共8页
A co-culture of two plant materials, Astragalus sinicus L., a leguminous plant with concomitant nodules, and Elsholtzia splendens Naki-a Cu accumulator, along with treatments of a chelating agent (EDTA), root excretio... A co-culture of two plant materials, Astragalus sinicus L., a leguminous plant with concomitant nodules, and Elsholtzia splendens Naki-a Cu accumulator, along with treatments of a chelating agent (EDTA), root excretions (citric acid), and a control with E. splendens only were used to compare the mobility of heavy metals in chelating agents with a co-culture and to determine the potential for co-culture phytoremediation in heavy metal contaminated soils. The root uptake for Cu, Zn, and Pb in all treatments was significantly greater (P < 0.05) than that of the control treatment. However with translocation in the shoots, only Cu, Zn, and Pb in plants grown with the EDTA treatment and Zn in plants cocropped with the A. sinicus treatment increased significantly (P < 0.05). In addition, when a co-culture in soils with heavy and moderate contamination was compared, for roots in moderately contaminated soils only Zn concentration was significantly less (P < 0.05) than that of heavily contaminated soils, however, Cu, Zn, and Pb concentrations of shoots were all significantly lower (P < 0.05). Overall, this 'co-culture engineering' could be as effective as or even more effective than chelating agents, thereby preventing plant metal toxicity and metal leaching in soils as was usually observed in chelate-enhanced phytoremediation. 展开更多
关键词 Astragalus sinicus chelating agents co-culture Elsholtzia splendens PHYTOREMEDIATION
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Rice-duck co-culture benefits grain 2-acetyl-1-pyrroline accumulation and quality and yield enhancement of fragrant rice 被引量:9
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作者 Meijuan Li Ronghua Li +3 位作者 Shiwei Liu Jia'en Zhang Hao Luo Shuqing Qiu 《The Crop Journal》 SCIE CAS CSCD 2019年第4期419-430,共12页
Rice-duck co-culture is an integrated farming technology that benefits rice production, grain quality, and ecological sustainability in paddy fields. However, little is known about the effects of rice-duck co-culture ... Rice-duck co-culture is an integrated farming technology that benefits rice production, grain quality, and ecological sustainability in paddy fields. However, little is known about the effects of rice-duck co-culture on enzyme activity involved in the biosynthesis of 2-acetyl-1-pyrroline (2-AP), the volatile that gives fragrant rice its' distinctive and sought-after aroma. The present study aimed to examine the influence of rice-duck co-culture on the photosynthesis, yield, grain quality, rice aroma, and the enzymes involved in 2-acetyl-1-pyrroline biosynthesis in the cultivar Meixiangzhan 2 during the early and late rice growing seasons of 2016 in Guangzhou, China. We compared the rice grown in paddy fields with and without ducks. We found that rice-duck co-culture not only improved the yield and quality of fragrant rice grain, but also promoted the precursors of 2-AP biosynthesis formation and 2-AP accumulation in the grain. Grain 2-AP content in rice-duck co-culture was noticeably increased with 9.60% and 20.81% in early and late seasons, respectively. Proline and pyrroline-5-carboxylic acid (P5C) (precursors of 2-AP biosynthesis) and the activity of enzymes such as proline dehydrogenase (ProDH), ornithine aminotransferase (OAT) and Δ1 pyrroline-5-carboxylic acid synthetase (P5CS) were all improved by 10.15%–12.99%, 32.91%–47.75%, 17.81%–26.71%, 6.25%–21.78%, and 10.58%–38.87% under rice-duck co-culture in both seasons, respectively. Overall, our results suggest that rice-duck co-culture is an environmentally-friendly and sustainable approach to improving rice aroma and grain quality of fragrant rice. 展开更多
关键词 Rice-duck co-culture 2-AP Proline Yield GRAIN QUALITY FRAGRANT RICE
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Promoted differentiation of cynomolgus monkey ES cells into hepatocyte-like cells by co-culture with mouse fetal liver-derived cells 被引量:11
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作者 Ko Saito Masahide Yoshikawa +6 位作者 Yukiteru Ouji Kei Moriya Mariko Nishiofuku Shigehiko Ueda Noriko Hayashi Shigeaki Ishizaka Hiroshi Fukui 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第42期6818-6827,共10页
AIM: To explore whether a co-culture of cynomolgus monkey embryonic stem (cES) cells with embryonic liver cells could promote their differentiation into hepatocytes. METHODS: Mouse fetal liver-derived cells (MFLCs) we... AIM: To explore whether a co-culture of cynomolgus monkey embryonic stem (cES) cells with embryonic liver cells could promote their differentiation into hepatocytes. METHODS: Mouse fetal liver-derived cells (MFLCs) were prepared as adherent cells from mouse embryos on embryonic d (ED) 14, after which undifferentiated cES cells were co-cultured with MFLCs. The induction of cES cells along a hepatic lineage was examined in MFLC- assisted differentiation, spontaneous differentiation, and growth factors (GF) and chemicals-induced differentiations (GF-induced differentiation) using retinoic acid, leukemia inhibitory factor (LIF), FGF2, FGF4, hepatocyte growth factor (HGF), oncostatin M (OSM), and dexamethasone. RESULTS: The mRNA expression of α-fetoprotein, albumin (ALB), α-1-antitrypsin, and hepatocyte nuclear factor 4α was observed earlier in the differentiating cES cells co-cultured with MFLCs, as compared to cES cells undergoing spontaneous differentiation and those subjected to GF-induced differentiation. The expression of cytochrome P450 7a1, a possible marker for embryonic endoderm-derived mature hepatocytes, was only observed in cES cells that had differentiated in a co-culture with MFLCs. Further, the disappearance of Oct3/4, a representative marker of an undifferentiated state, was noted in cells co-cultured with MFLCs, but not in those undergoing spontaneous or GF-induced differentiation. Immunocytochemical analysis revealed an increased ratio of ALB-immunopositive cells among cES cells co-cultured with MFLCs, while glycogen storageand urea synthesis were also demonstrated. CONCLUSION: MFLCs showed an ability to induce cES cells to differentiate toward hepatocytes. The co-culture system with MFLCs is a useful method for induction of hepatocyte-like cells from undifferentiated cES cells. 展开更多
关键词 Primate embryonic stem cells Fetal liver Hepatic differentiation co-culture
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Probiotic modulation of dendritic cells co-cultured with intestinal epithelial cells 被引量:10
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作者 Ji Yeun Kim Myeong Soo Park Geun Eog Ji 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第12期1308-1318,共11页
AIM: To investigate cytokine production and cell surface phenotypes of dendritic cells (DC) in the presence of epithelial cells stimulated by probiotics.METHODS: Mouse DC were cultured alone or together with mouse... AIM: To investigate cytokine production and cell surface phenotypes of dendritic cells (DC) in the presence of epithelial cells stimulated by probiotics.METHODS: Mouse DC were cultured alone or together with mouse epithelial cell monolayers in normal or in- verted systems and were stimulated with heat-killed probiotic bacteria, Bifidobacterium lactis ADO 11 (BL), Bifidobacterium bilfidum BGN4 (BB), Lactobacillus casei IBS041 (LC), and Lactobacillus acidophilus AD031 (LA), for 12 h. Cytokine levels in the culture supernatants were determined by enzyme-linked immunosorbent as say and phenotypic analysis of DC was investigated by flow cytometry.RESULTS: BB and LC in singlecultured DC increased the expression of I-Ad, CD86 and CD40 (I-Ad, 18.51 vs 30.88, 46.11, CD86, 62.74 vs 92.7, 104.12; CD40, 0.67 vs 6.39, 3.37, P 〈 0.05). All of the experimental probiot-ics increased the production of inflammatory cytokines, interleukin (IL)-6 and tumor necrosis factor (TNF)-α. However, in the normal coculture systems, LC and LA decreased the expression of I-A^α (39.46 vs 30.32, 33.26, P 〈 0.05), and none of the experimental probiotics increased the levels of IL-6 or TNF-α. In the inverted coculture systems, LC decreased the expression of CD40 (1.36 vs -2.27, P 〈 0.05), and all of the experimental probiotics decreased the levels of IL-6. In addition, BL increased the production of IL-10 (103.8 vs 166.0, P 〈 0.05) and LC and LA increased transforming growth factor-13 secretion (235.9 vs 618.9, 607.6, P 〈 0.05).CONCLUSION: These results suggest that specific pro- biotic strains exert differential immune modulation mediated by the interaction of dendritic cells and epithelial cells in the homeostasis of gastrointestinal tract. 展开更多
关键词 Dendritic cells Intestinal epithelial cells Pro-biotics co-culture Immune modulation
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Impact of Rice-Catfish/Shrimp Co-culture on Nutrients Fluxes Across Sediment-Water Interface in Intensive Aquaculture Ponds 被引量:4
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作者 LIU Yaobin QIN Lin +6 位作者 LI Fengbo ZHOU Xiyue XU Chunchun JI Long CHEN Zhongdu FENG Jinfei FANG Fuping 《Rice science》 SCIE CSCD 2019年第6期416-424,共9页
Exchange of nitrogen and phosphorus across sediment-water interface plays an important role in the management of nutrient recycling in the aquaculture pond. In this study, a plot experiment was conducted to study the ... Exchange of nitrogen and phosphorus across sediment-water interface plays an important role in the management of nutrient recycling in the aquaculture pond. In this study, a plot experiment was conducted to study the effect of rice-catfish/shrimp co-culture on the micro-profile of oxygen (O2), pH and nutrient exchange across sediment-water interface in the intensive culture ponds. The results showed that rice-catfish co-culture increased the concentration and penetrating depth of O2, but decreased the pH value across the sediment-water interface, compared with catfish monoculture. Additional rice cultivation significantly reduced the flux rates of ammonium (NH4+) and nitrate (NO3-) across sediment-water interface in the catfish and shrimp ponds. The flux rates of NO2 - and soluble phosphorus (PO43-) showed no significant difference between rice-catfish/shrimp co-culture ponds and catfish/shrimp monoculture ponds. Rice only affected the dissolved inorganic nitrogen and phosphorus fractions in the sediment. The concentrations of NH4 + were significantly lower in the sediment of co-culture ponds than in the monoculture ponds. Additional rice cultivation also significantly reduced the content and percentage of dissolved inorganic phosphorus in the sediment of catfish ponds. 展开更多
关键词 sediment-water interface rice-fish co-culture EUTROPHICATION nitrogen and phosphorus recycling AQUACULTURE
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Advances in tumor-endothelial cells co-culture and interaction on microfluidics 被引量:5
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作者 Weiwei Li Mashooq Khan +2 位作者 Sifeng Mao Shuo Feng Jin-Ming Lin 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2018年第4期210-218,共9页
The metastasis in which the cancer cells degrade the extracellular matrix (ECM) and invade to the sur- rounding and far tissues of the body is the leading cause of mortality in cancer patients, With a lot of advance... The metastasis in which the cancer cells degrade the extracellular matrix (ECM) and invade to the sur- rounding and far tissues of the body is the leading cause of mortality in cancer patients, With a lot of advancement in the field, yet the biological cause of metastasis are poorly understood, The microfluidic system provides advanced technology to reconstruct a variety of in vivo-like environment for studying the interactions between tumor ceils (TCs) and endothelial ceils (ECs). This review gives a brief account of both two-dimensional models and three-dimensional microfluidic systems for the analysis of TCs-ECs co- culture as well as their applications to anti-cancer drug screening, Furthermore, the advanced methods for analyzing cell-to-cell interactions at single-cell level were also discussed, 展开更多
关键词 Microfluidic Cell analysis Cell co-culture Cell interaction REVIEW
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Effects of Rice-Fish Co-culture on Oxygen Consumption in Intensive Aquaculture Pond 被引量:5
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作者 LI Fengbo SUN Zhiping +6 位作者 QI Hangying ZHOU Xiyue XU Chunchun WU Dianxin FANG Fuping FENG Jinfei ZHANG Ning 《Rice science》 SCIE CSCD 2019年第1期50-59,共10页
Rice-fish co-culture has gained increasing attention to remediate the negative environmental impacts induced by intensive aquaculture. However, the effect of rice-fish co-culture on oxygen depletion has rarely been in... Rice-fish co-culture has gained increasing attention to remediate the negative environmental impacts induced by intensive aquaculture. However, the effect of rice-fish co-culture on oxygen depletion has rarely been investigated. We constructed a rice-fish co-culture system in yellow catfish(Pelteobagrus fulvidraco) and freshwater shrimp(Macrobrachium nipponense) ponds using a new high-stalk rice variety, and conducted a field experiment to investigate the effect of rice-fish co-culture on water parameters and oxygen consumption. The results showed that rice-fish co-culture reduced the nutrients(total nitrogen, ammonia-N, total phosphorous and potassium) and the dissolved oxygen content in fish and shrimp ponds. However, they showed similar seasonal change of dissolved oxygen in the water of fish and shrimp ponds. Rice-fish co-culture reduced the total amount of oxygen consumption and optimized the oxygen consumption structure in pond. The respiration rates in water and sediment were significantly reduced by 66.1% and 31.7% in the catfish pond, and 64.4% and 38.7% in the shrimp pond, respectively, by additional rice cultivation. Rice-fish co-culture decreased the proportions of respiration in sediment and water, and increased the proportion of fish respiration. These results suggest that rice-fish co-culture is an efficient way to reduce hypoxia in intensive culture pond. 展开更多
关键词 rice-fish co-culture oxygen depletion respiration POND aquaculture yellow CATFISH FRESHWATER shrimp
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In vitro model of the blood-brain barrier established by co-culture of primary cerebral microvascular endothelial and astrocyte cells 被引量:7
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作者 Yan Wang Ning Wang +3 位作者 Biao Cai Guang-yun Wang Jing Li Xing-xing Piao 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第12期2011-2017,共7页
Drugs for the treatment and prevention of nervous system diseases must permeate the bloodbrain barrier to take effect.In vitro models of the blood-brain barrier are therefore important in the investigation of drug per... Drugs for the treatment and prevention of nervous system diseases must permeate the bloodbrain barrier to take effect.In vitro models of the blood-brain barrier are therefore important in the investigation of drug permeation mechanisms.However,to date,no unified method has been described for establishing a blood-brain barrier model.Here,we modified an in vitro model of the blood-brain barrier by seeding brain microvascular endothelial cells and astrocytes from newborn rats on a polyester Transwell cell culture membrane with 0.4-μm pores,and conducted transepithelial electrical resistance measurements,leakage tests and assays for specific bloodbrain barrier enzymes.We show that the permeability of our model is as low as that of the bloodbrain barrier in vivo.Our model will be a valuable tool in the study of the mechanisms of action of neuroprotective drugs. 展开更多
关键词 nerve regeneration blood-brain barrier ASTROCYTES brain microvascular endothelial cells permeability co-culture Transwell chamber neural regeneration
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Supportive angiogenic and osteogenic differentiation of mesenchymal stromal cells and endothelial cells in monolayer and co-cultures 被引量:3
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作者 Florian Bohrnsen Henning Schliephake 《International Journal of Oral Science》 SCIE CAS CSCD 2016年第4期223-230,共8页
Sites of implantation with compromised biology may be unable to achieve the required level of angiogenic and osteogenic regeneration. The specific function and contribution of different cell types to the formation of ... Sites of implantation with compromised biology may be unable to achieve the required level of angiogenic and osteogenic regeneration. The specific function and contribution of different cell types to the formation of prevascularized, osteogenic networks in co-culture remains unclear. To determine how bone marrow-derived mesenchymal stromal cells (BMSCs) and endothelial cells (ECs) contribute to cellular proangiogenic differentiation, we analysed the differentiation of BMSCs and ECs in standardized monolayer, Transwell and co-cultures. BMSCs were derived from the iliac bone marrow of five patients, characterized and differentiated in standardized monolayers, permeable Transwells and co-cultures with human umbilical vein ECs (HUVECs). The expression levels of CD31, von Willebrand factor, osteonectin (ON) and Runx2 were assessed by quantitative reverse transcriptase polymerase chain reaction. The protein expression of alkaline phosphatase, ON and CD31 was demonstrated via histochemical and immunofluorescence analysis. The results showed that BMSCs and HUVECs were able to retain their lineage-specific osteogenic and angiogenic differentiation in direct and indirect co-cultures. In addition, BMSCs demonstrated a supportive expression of angiogenic function in co-culture, while HUVEC was able to improve the expression of osteogenic marker molecules in BMSCs. 展开更多
关键词 angiogenic co-culture differentiation endothelial cell mesenchymal stromal cell OSTEOGENIC
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Protective effects of ACLF sera on metabolic functions and proliferation of hepatocytes co-cultured with bone marrow MSCs in vitro 被引量:8
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作者 Xiao-Lei Shi Jin-Yang Gu +5 位作者 Yue Zhang Bing Han Jiang-Qiang xiao Xian-Wen Yuan Ning Zhang Yi-Tao Ding 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第19期2397-2406,共10页
AIM: To investigate whether the function of hepatocytes co-cultured with bone marrow mesenchymal stem cells (MSCs) could be maintained in serum from acute-on- chronic liver failure (ACLF) patients.METHODS: Hepat... AIM: To investigate whether the function of hepatocytes co-cultured with bone marrow mesenchymal stem cells (MSCs) could be maintained in serum from acute-on- chronic liver failure (ACLF) patients.METHODS: Hepatocyte supportive functions and cy- totoxicity of sera from 18 patients with viral hepatitis B-induced ACLF and 18 healthy volunteers were evalu- ated for porcine hepatocytes co-cultured with MSCs and hepatocyte mono-layered culture, respectively. Chemo- kine profile was also examined for the normal serum and liver failure serum.RESULTS: Hepatocyte growth factor (HGF) and Tumor necrosis factor; tumor necrosis factor (TNF)-a were re- markably elevated in response to ACLF while epidermal growth factor (EGF) and VEGF levels were significantly decreased. Liver failure serum samples induced a higher detachment rate, lower viability and decreased liver sup- port functions in the homo-hepatocyte culture. Hepato-cytes co-cultured with MSCs could tolerate the cytotoxic- ity of the serum from ACLF patients and had similar liver support functions compared with the hepatocytes cul- tured with healthy human serum in vitro. In addition, co- cultured hepatocytes maintained a proliferative capability despite of the insult from liver failure serum.CONCLUSION: ACLF serum does not impair the cell morphology, viability, proliferation and overall metabolic capacities of hepatocyte co-cultured with MSCs in vitro. 展开更多
关键词 Acute-on-chronic liver failure serum Primary hepatocytes Bone marrow marrow mesenchymal stem cells co-culture Hepatocyte-based modality
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Co-Culture of Early Embryo with Human Decidual Stromal Cells in vitro by Improvement of Early Embryo Development 被引量:3
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作者 闫洁 朱桂金 +1 位作者 刘建新 艾继辉 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2000年第1期79-81,共3页
Summary: An early embryo co-culture system with human decidual stromal cells was established to study its effect on early embryonic cleavage and growth in vitro. Three hundred and eight 2-cell mouse embryos were co-cu... Summary: An early embryo co-culture system with human decidual stromal cells was established to study its effect on early embryonic cleavage and growth in vitro. Three hundred and eight 2-cell mouse embryos were co-cultured with human decidual stromal cell monolayer in MEM+0. 4 % bovine serum albumin (BSA) and 163 embryos cultured in MEM+15 % FCS alone as control. Among the mouse 2-cell embryos co-cultured with human decidual stromal cells, 72.73 % developed to the morula stage and 67.21 % cavitated to blastocysts with 59. 74 % hatching, as compared with 61. 34 % to morula stage, 48. 47 % to blastocysts and none hatching in the controls, respectively. Co-cultured embryos cleaved slightly faster than controls and showed no or less fragmentation than those in the control. These results suggested that human decidual stromal cells can support early embryonic development and yield a reasonable number of embryos with good quality up to blastocyst stage. 展开更多
关键词 human decidual stromal cells EMBRYO co-culture
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Puerarin exhibits greater distribution and longer retention time in neurons than astrocytes in a co-cultured system 被引量:3
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作者 Shu-Yong Wei Jie Tong +5 位作者 Qiang Xue Fang-hong Shang Yan-jun Li Yang Liu Bin-bin Feng Xiao-yu Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第4期605-609,共5页
The phytoestrogen puerarin has been shown to protect neurons and astrocytes in the brain, and is therefore an attractive drug in the treatment of Alzheimer’s disease, Parkinson’s disease and cerebral ischemia. Wheth... The phytoestrogen puerarin has been shown to protect neurons and astrocytes in the brain, and is therefore an attractive drug in the treatment of Alzheimer’s disease, Parkinson’s disease and cerebral ischemia. Whether puerarin exhibits the same biological processes in neurons and astro-cytesin vitro has rarely been reported. In this study, cortical neurons and astrocytes of newborn Sprague-Dawley rats were separated, identiifed and co-cultured in a system based on Transwell membranes. The retention time and distribution of puerarin in each cell type was detected by lfuorescence spectrophotometry and lfuorescence microscope. The concentration of puerarin in both co-cultured and separately cultured neurons was greater than that of astrocytes. Puerarin concentration reached a maximum 20 minutes after it was added. At 60 minutes after its addi-tion, a scant amount of drug was detected in astrocytes; however in both separately cultured and co-cultured neurons, the concentration of puerarin achieved a stable level of about 12.8 ng/mL. The results indicate that puerarin had a higher concentration and longer retention time in neu-rons than that observed in astrocytes. 展开更多
关键词 nerve regeneration PUERARIN in vitro experiments co-culture NEURONS ASTROCYTES TRANSWELL neonatal rats neural regeneration
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Osteogenic Differentiation of Bone Mesenchymal Stem Cells Regulated by Osteoblasts under EMF Exposure in a Co-culture System 被引量:2
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作者 虞冀哲 吴华 +3 位作者 杨勇 刘朝旭 刘阳 宋明宇 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2014年第2期247-253,共7页
This study examined the osteogenic effect of electromagnetic fields (EMF) under the simulated in vivo conditions. Rat bone marrow mesenchymal stem cells (BMSCs) and rat osteoblasts were co-cultured and exposed to ... This study examined the osteogenic effect of electromagnetic fields (EMF) under the simulated in vivo conditions. Rat bone marrow mesenchymal stem cells (BMSCs) and rat osteoblasts were co-cultured and exposed to 50 Hz, 1.0 mT EMF for different terms. Unexposed single-cultured BMSCs and osteoblasts were set as controls. Cell proliferation features of single-cultured BMSCs and osteoblasts were studied by using a cell counting kit (CCK-8). For the co-culture system, cells in each group were randomly chosen for alkaline phosphatase (ALP) staining on the day 7. When EMF exposure lasted for 14 days, dishes in each group were randomly chosen for total RNA extraction and von Kossa staining. The mRNA expression of osteogenic markers was detected by using real-time PCR. Our study showed that short-term EMF exposure (2 h/day) could obviously promote prolifera- tion of BMSCs and osteoblasts, while long-term EMF (8 h/day) could promote osteogenic differen- tiation significantly under co-cultured conditions. Under EMF exposure, osteogenesis-related mRNA expression changed obviously in co-cultured and single-cultured cells. It was noteworthy that most osteogenic indices in osteoblasts were increased markedly after co-culture except Bmp2, which was increased gradually when ceils were exposed to EMF. Compared to other indices, the expression of Bmp2 in BMSCs was increased sharply in both single-cultured and co-cultured groups when they were exposed to EMF. The mRNA expression of Bmp2 in BMSCs was approximately four times higher in 8-h EMF group than that in the unexposed group. Our results suggest that Bmp2-mediated cellular interaction induced by EMF exposure might play an important role in the osteogenic differ- entiation of BMSCs. 展开更多
关键词 electromagnetic fields bone marrow mesenchymal stem cell OSTEOBLAST osteogenicmechanism co-culture
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Co-culture of Mesenchymal Stem Cells with Umbilical Vein Endothelial Cells under Hypoxic Condition 被引量:3
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作者 张波 杨述华 +3 位作者 张宇坤 孙志博 许伟华 叶树楠 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2012年第2期173-180,共8页
By co-culturing humm mesenchymal stem cells (hMSCs) and human umbilical rein endothelial cells (HUVECs) under hypoxia and creating a microenvironment similar to that of transplanted hMSCs for the treatment of avascula... By co-culturing humm mesenchymal stem cells (hMSCs) and human umbilical rein endothelial cells (HUVECs) under hypoxia and creating a microenvironment similar to that of transplanted hMSCs for the treatment of avascular ni ANFH, the effect of hMSCs on survival, apoptosis, migration and angiogenesis of human umbilical vein endothelial cells (HUVECs) under the hypoxic condition were investigated in vitro. hMSCs and HUVECs were cultured and identified in vitro. Three kinds of conditioned media, CdM-CdMNOR, CdM-CdMHYP and HUVEC-CdMHYP were prepared. HUVECs were cultured with these conditioned media under hypoxia. The survival rate, apoptosis rate, migration and angiogenesis of HUVECs were respectively detected by CCK-8, flow cytometry, Transwell and tube formation assay. The content of SDF-1α, VEGF and IL-6 in CdM was determined by ELISA. Our results showed that hMSCs and HUVECs were cultured and identified successfully. Compared with MSC-CdMNOR and HUVEC-CdMHYP groups, the survival rate, migra-tion and angiogenesis of HUVECs in MSC-CdMHYP group were significantly increased while the apoptosis rate was declined (P<0.05). Moreover, the expression of SDF-1α, VEGF and IL-6 in MSC-CdMHYP group was up-regulated. Under hypoxia, the apoptosis of HUVECs was inhibited while survival, migration and angiogenesis were improved by co-culture of hMSCs and HUVECs. The underlying mechanism may be that hMSCs could secrete a number of cytokines and improve niche, which might be helpful in the treatment of femoral head necrosis. 展开更多
关键词 HYPOXIA mesenchymal stem cells umbilical vein endothelial cells co-culture femoral head necrosis
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Neural differentiation of human placenta-derived mesenchymal stem cells following neural cell co-culture 被引量:2
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作者 Nailong Yang Hongyan Zhang Xiaojuan Sun Lili Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第1期23-28,共6页
We induced human placenta-derived mesenchymal stem cells (hPMSCs) to differentiate into neural cells by adding chemical reagents, despite the fact that toxic chemicals induce cell shrinkage or cytoskeletal formation... We induced human placenta-derived mesenchymal stem cells (hPMSCs) to differentiate into neural cells by adding chemical reagents, despite the fact that toxic chemicals induce cell shrinkage or cytoskeletal formation, which does not represent a proper cell differentiation process. The present study established a co-culture system with hPMSCs and neural cells and analyzed the influence of neural cells on hPMSC differentiation in a co-culture system, hPMSCs were isolated and purified from human full-term placenta using collagenase digestion. Fetal neural cells were co-cultured with hPMSCs for 48 hours using the Transwell co-culture system, hPMSCs co-cultured with neural cells exhibited a slender morphology with a filament. After 96 hours, hPMSCs expressed neuron-specific enolase, which suggested that co-culture of hPMSCs and neural cells induced neural differentiation of hPMSCs. 展开更多
关键词 human placenta-derived mesenchymal stem cells TRANSWELL co-culture DIFFERENTIATION neural cells
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Science Letters:Cellular growth under hydrostatic pressure using bovine aortic EC-SMC co-cultured ePTFE vascular graft 被引量:1
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作者 孙雷 NIWA Koichi +1 位作者 林建忠 KARINO Takeshi 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2005年第2期79-82,共4页
High blood pressure (hypertension) is implicated in the development of atherosclerosis. Blood vessels are constantly subjected to stretch due to blood pressure and changes in stretch usually instigate adaptive vascula... High blood pressure (hypertension) is implicated in the development of atherosclerosis. Blood vessels are constantly subjected to stretch due to blood pressure and changes in stretch usually instigate adaptive vascular remodeling, including abnormal growth and proliferation of vascular smooth muscle cells (VSMCs) as well as extracellular matrix (ECM). In this experiment, we used bovine aortic endothelial cells and smooth muscle cells (EC-SMC) co-cultured ePTFE vascular grafts subjected to normal atmospheric pressure (as a control), and 100 mmHg hydrostatic pressure for 7 d. The increase of cell layer thickness was observed. When measured, the cell layer thickness increased by 116.2%. The increase of collagen (Type Ⅳ)synthesis was also observed in the immunohistochemistry assay. When stained with toluidine blue, the cells showed metachromatic phenomenon. 展开更多
关键词 Pressure ePTFE graft EC-SMC co-culture Collagen Proliferation Metachromatic
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Osteoblast integration of dental implant materials after challenge by sub-gingival pathogens: a co-culture study in vitro 被引量:1
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作者 Bingran Zhao Henny C van der Mei +2 位作者 Minie Rustema-Abbing Henk J Busscher Yijin Ren 《International Journal of Oral Science》 SCIE CAS CSCD 2015年第4期250-258,共9页
Sub-gingival anaerobic pathogens can colonize an implant surface to compromise osseointegration of dental implants once the soft tissue seal around the neck of an implant is broken. In vitro evaluations of implant mat... Sub-gingival anaerobic pathogens can colonize an implant surface to compromise osseointegration of dental implants once the soft tissue seal around the neck of an implant is broken. In vitro evaluations of implant materials are usually done in monoculture studies involving either tissue integration or bacterial colonization. Co-culture models, in which tissue cells and bacteria battle simultaneously for estate on an implant surface, have been demonstrated to provide a better in vitro mimic of the clinical situation. Here we aim to compare the surface coverage by U2OS osteoblasts cells prior to and after challenge by two anaerobic sub-gingival pathogens in a co-culture model on differently modified titanium (Ti), titanium-zirconium (TiZr) alloys and zirconia surfaces. Monoculture studies with either U2OS osteoblasts or bacteria were also carried out and indicated significant differences in biofilm formation between the implant materials, but interactions with U2OS osteoblasts were favourable on all materials. Adhering U2OS osteoblasts cells, however, were significantly more displaced from differently modified Ti surfaces by challenging sub-gingival pathogens than from TiZr alloys and zirconia variants. Combined with previous work employing a co-culture model consisting of human gingival fibroblasts and supra-gingival oral bacteria, results point to a different material selection to stimulate the formation of a soft tissue seal as compared to preservation of osseointegration under the unsterile conditions of the oral cavity. 展开更多
关键词 biofilm co-culture dental implant OSTEOBLASTS sub-gingival pathogens titanium-zirconium alloy
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Effects of Pulsed Electromagnetic Fields of Different Frequencies on the Gene Expression of RANK and NFATc1 in Rat Osteoclasts Co-Cultured with Osteoblasts 被引量:1
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作者 Jian Chen Hui Huang +1 位作者 Jianquan He Zhang Xin 《Journal of Biomedical Science and Engineering》 2017年第1期21-30,共10页
The study investigated the effects of pulsed electromagnetic fields (PEMFs) of different frequencies on the gene expression of receptor activator of nuclear factor kappa B (RANK) and Nuclear factor of activated T-cell... The study investigated the effects of pulsed electromagnetic fields (PEMFs) of different frequencies on the gene expression of receptor activator of nuclear factor kappa B (RANK) and Nuclear factor of activated T-cells cytoplasmic 1 (NFATc1) in rat osteoblast and osteoclast co-cultured model. Osteoblast-like cells were isolated from calvariae of Newborn Sprague Dawley rats (SD rats), while osteoclast-like cells were obtained from femora and tibiae of five weeks old SD rats. After 1 days of co-culture, the cells were exposed to premarin (E2) and different frequencies of PEMFs (8 Hz and 16 Hz, respectively) for 3 days. The expression of RANK and NFATc1 mRNA was analysed with realtime quantitative polymerase chain reaction. The gene expression of RANK and NFATc1 in the E2, PEMF with 8 Hz and 16 Hz group was significantly lower than that in the control group respectively. The gene expression of NFATc1 in the PEMF with 8 Hz group was significantly lower than that in the control group and PEMF with 16 Hz group. The study indicates that PEMF with 8 Hz could regulate the gene expression of RANK and NFATc1 in co-cultured model. 展开更多
关键词 PEMFs co-cultured RANK MRNA NFATc1 MRNA
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Induced Production of Exoglucanase, and <i>β</i>-Glucosidase from Fungal Co-Culture of T. <i>viride</i>and G. <i>lucidum</i> 被引量:1
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作者 Tanzila Shahzadi Zahid Anwar +7 位作者 Zafar Iqbal Awais Anjum Tahir Aqil Bakhtawar   Arroha Afzal Muhammad Kamran Sajid Mehmood Muhammad Irshad 《Advances in Bioscience and Biotechnology》 2014年第5期426-433,共8页
In the present study, a co-culture technique was adopted with an aim to investigate a hyper production of exoglucanase, and β-glucosidase using cheap and easily available agro-industrial residue corn stover as growth... In the present study, a co-culture technique was adopted with an aim to investigate a hyper production of exoglucanase, and β-glucosidase using cheap and easily available agro-industrial residue corn stover as growth supporting substrate. Various physio-chemical and nutritional variables were optimized using classical and completely randomized designs for induced production of exoglucanase, and β-glucosidase from the co-culture of Trichoderma viride and Ganoderma lucidum in solid state fermentation (SSF). Analysis profile showed that when the conditions of the SSF medium containing 15 g corn stover substrate (50% w/w moisture) inoculated with 6 mL of inoculum were optimal, the maximum productions of exoglucanase (485 ± 6.5 U/mL) and β-glucosidase (255 ± 3.3 U/mL) were recorded after 5 days of incubation at pH 6 and 35°C. 展开更多
关键词 Process Optimization SSF co-culture T. viride G. lucidum
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