Human primary epithelial cells of renal pelvis was established to investigate the adherence of uropathogenic Escherichia coli (UPEC) to this cell line, in which the primary cell culture was performed by using cultivat...Human primary epithelial cells of renal pelvis was established to investigate the adherence of uropathogenic Escherichia coli (UPEC) to this cell line, in which the primary cell culture was performed by using cultivation of the normal epithelium of renal pelvis in keratinocyte serum free medium (K-SFM) with epidermal growth factor (EGF) and bovine pituitary extract (BPE). Both UPEC132 obtained from urine specimen of patients with pyelonephritis and the pilus-free representative strain E. coli K-12p678-54 were used to study the adherence of these strains on human primary epithelial cells of renal pelvis. The UPEC adherence was performed with observation on the morphological changes of the adhered cells, while the adhesion rates and indices were calculated in different times of experiment. In addition, the virulence genes hly and cnf1 of UPEC132 were detected by multiplex PCR assay. In this study, the human primary epithelial cells of renal pelvis was found to exhibit the character of the transitional epithelial cells. Compared with the control group, the adhesion rates and indices began to increase from 15 min of the experiment time and reached its peak in 120 min. The adhesion rate and index of UPEC132 to human primary epithelial cells of renal pelvis were 74.4% and 34.0 respectively. Many microscopic changes in the primary cells adhered with UPEC132 could be detected, such as rounding or irregularity in shape, unevenness in staining and the cytoplasmic and nuclear changes. It suggests that human primary epithelial cells of renal pelvis can be used for the experiment on UPEC adhesion, thus providing a basis for the further study on the pathogenesis of UPEC.展开更多
Carbon monoxide（CO）,as a vital small molecule in signaling pathways,is found to be involved in ischemia-reperfusion injury（IRI） in renal transplantation.CO-releasing molecule-2（CORM-2）,a CO-releasing molecule,is...Carbon monoxide（CO）,as a vital small molecule in signaling pathways,is found to be involved in ischemia-reperfusion injury（IRI） in renal transplantation.CO-releasing molecule-2（CORM-2）,a CO-releasing molecule,is a type of metal carbonyl complexes which can quickly release CO in vivo.In this study,an in vitro oxidative stress injury model was established to examine the effect of CORM-2 pretreatment on the nuclear-cytoplasmic translocation of high mobility group box 1 protein（HMGB1） in mouse primary renal proximal tubular epithelial cells（RPTECs）.Immunofluorescence staining showed that HMGB1 in the medium-and CORM-2-treated groups was predominantly localized in the nucleus of the cells,whereas higher amounts of HMGB1 translocated to the cytoplasm in the H2O2-and inactive CORM-2（i CORM-2）-treated groups.Western blotting of HMGB1 showed that the total amounts of cytoplasmic HMGB1 in the H2O2-treated（0.59±0.27） and i CORM-2-treated（0.57±0.22） groups were markedly higher than those in the medium-treated（0.19±0.05） and CORM-2-treated（0.21±0.10） groups（P〈0.05）.Co-immunoprecipitation showed that the levels of acetylated HMGB1 in the H2O2-treated（642.98±57.25） and i CORM-2-treated（342.11±131.25） groups were markedly increased as compared with the medium-treated（78.72±74.17） and CORM-2-treated（71.42±53.35） groups（P〈0.05）,and no significant difference was observed between the medium-treated and CORM-2-treated groups（P〉0.05）.In conclusion,our study demonstrated that in the in vitro oxidative stress injury model of primary RPTECs,CORM-2 can significantly inhibit the nuclear-cytoplasmic translocation of HMGB1,which is probably associated with the prevention of HMGB1 acetylation.展开更多
To investigate the role of connective tissue growth factor (CTGF) in transdifferentiation of human renal tubular epithelial cell (HKC), in vitro cultured HKC cells were divided into 3 groups: negtive control, low dose...To investigate the role of connective tissue growth factor (CTGF) in transdifferentiation of human renal tubular epithelial cell (HKC), in vitro cultured HKC cells were divided into 3 groups: negtive control, low dose CTGF-treated group (rh CTGF, 2.5 ng/ml) and high dose CTGF-treated (rhCTGF, 5.0 ng/ml). Then the expression of α-smooth muscle actin (α-SMA) were assessed by indirect immuno-fluorescence, and the percentage of α-SMA positive cells were assessed by flow cytometry. RT-PCR were also performed to examine the mRNA level of α-SMA. Upon the stimulation of different concentrations of rhCTGF, the expression of α-SMA were markedly stronger than that in negative controls. The percentages of α-SMA positive cells were significantly higher in the stimulated groups than that of negative controls (38.9 %, 65.5 % vs 2.4 %, P<0.01) .α-SMA mRNA levels were also up-regulated by the stimulation of rhCTGF (P<0.01). These results suggest that CTGF can promote the transdifferentiation of human renal tubular epithelial cells towards myofibroblast (Myo-F).展开更多
To explore a new way of constructing bioartificial renal tubule assist device （RAD） in vitro and its function of transporting sodium （Na^＋） and glucose and to evaluate the application of atomic force microscope i...To explore a new way of constructing bioartificial renal tubule assist device （RAD） in vitro and its function of transporting sodium （Na^＋） and glucose and to evaluate the application of atomic force microscope in the RAD construction, rat renal tubular epithelial cell line NRK-52E was cultured in vitro, seeded onto the outer surfaces of hollow fibers in a bioreactor, and then cultured for two weeks to construct RAD. Bioreactor hollow fibers without NRK-52E cells were used as control. The morphologies of attached cells were observed with scanning electron microscope, and the junctions of cells and polysulfone membrane were observed with atomic force microscope. Transportation of Na＋ and glucose was measured. Oubaine and phlorizin were used to inhibit the transporting property. The results showed that NRK-52E cells and polysulfone membrane were closely linked, as observed under atomic force microscope. After exposure to oubaine and phlorizin, transporting rates of Na^＋ and glucose were decreased significantly in the RAD group as compared with that in the control group （P〈0.01）. Furthermore, when the inhibitors were removed, transportation of Na^＋ and glucose was restored. It is concluded that a new RAD was constructed successfully in vitro, and it is able to selectively transport Na^＋ and glucose.展开更多
The mechanism of how SARS-CoV-2 causes severe multi-organ failure is largely unknown. Acute kidney injury(AKI) is one of the frequent organ damage in severe COVID-19 patients. Previous studies have shown that human re...The mechanism of how SARS-CoV-2 causes severe multi-organ failure is largely unknown. Acute kidney injury(AKI) is one of the frequent organ damage in severe COVID-19 patients. Previous studies have shown that human renal tubule cells could be the potential host cells targeted by SARS-CoV-2. Traditional cancer cell lines or immortalized cell lines are genetically and phenotypically different from host cells. Animal models are widely used, but often fail to reflect a physiological and pathogenic status because of species tropisms. There is an unmet need for normal human epithelial cells for disease modeling. In this study, we successfully established long term cultures of normal human kidney proximal tubule epithelial cells(KPTECs) in 2 D and 3 D culture systems using conditional reprogramming(CR) and organoids techniques.These cells had the ability to differentiate and repair DNA damage, and showed no transforming property. Importantly, the CR KPTECs maintained lineage function with expression of specific transporters(SLC34 A3 and cubilin). They also expressed angiotensin-converting enzyme 2(ACE2), a receptor for SARS-CoV and SARS-CoV-2. In contrast, cancer cell line did not express endogenous SLC34 A3, cubilin and ACE2. Very interestingly, ACE2 expression was around twofold higher in 3 D organoids culture compared to that in 2 D CR culture condition. Pseudovirion assays demonstrated that SARS-CoV spike(S) protein was able to enter CR cells with luciferase reporter. This integrated 2 D CR and 3 D organoid cultures provide a physiological ex vivo model to study kidney functions, innate immune response of kidney cells to viruses, and a novel platform for drug discovery and safety evaluation.展开更多
目的观察人脐带间充质干细胞(HUMSC)对糖尿病肾病大鼠肾脏缺氧诱导因子(HIF-1α)表达的影响。方法50只健康清洁级8周龄雄性SD大鼠,随机选取20只为健康对照组,其余30只采用链脲菌素复制糖尿病肾病大鼠模型(模型组),两组大鼠饲养12周。第1...目的观察人脐带间充质干细胞(HUMSC)对糖尿病肾病大鼠肾脏缺氧诱导因子(HIF-1α)表达的影响。方法50只健康清洁级8周龄雄性SD大鼠,随机选取20只为健康对照组,其余30只采用链脲菌素复制糖尿病肾病大鼠模型(模型组),两组大鼠饲养12周。第12周,随机选取两组大鼠各3只分别尾静脉注射DiR-HUMSCs,代谢12~16 h后在小动物活体光学3D成像系统下观察DiR-HUMSCs在大鼠体内的分布。随机选取9只模型组大鼠进行HUMSCs移植(HUMSCs移植组)。HUMSCs移植采用尾静脉注射方式移植浓度为1×10^(6)个/mL HUMSCs 500μL至大鼠体内,每周1次,连续4周,共28 d。检测3组大鼠的24 h尿蛋白定量(24 h UPro)、血清肌酐(Scr)、血尿素氮(BUN)、尿肌酐(Ucr)、尿白蛋白与肌酐比值(UACR)水平;酶联免疫吸附试验(ELISA)检测3组大鼠血清HIF-1α水平;采用PAS和Masson染色进行肾脏组织病理检测;免疫荧光法检测3组大鼠肾组织HIF-1α、Slc12A3和Aquaporin1蛋白的表达。结果移植HUMSCs治疗4周后,与健康对照组比较,模型组和HUMSCs移植组大鼠Ucr水平降低(P<0.05),Scr、24 h UPro、BUN、UCAR均升高(P<0.05);与模型组比较,HUMSCs移植组大鼠Ucr水平差异无统计学意义(P>0.05),Scr、24 h UPro、BUN、UCAR均降低(P<0.05)。糖尿病肾病大鼠病理损伤缓解,系膜增生和基底膜增厚改善,小管空泡变性减少,间质纤维化减轻。模型组大鼠血清HIF-1α水平较健康对照组升高(P<0.05),HUMSCs移植组血清HIF-1α水平较模型组下降(P<0.05)。与健康对照组比较,模型组大鼠肾脏远端小管中HIF-1α蛋白水平增加(P<0.05);HUMSCs移植组的HIF-1α蛋白水平较模型组降低(P<0.05)。模型组远端小管标记蛋白Slc12A3水平低于健康对照组(P<0.05),HUMSCs移植组Slc12A3水平较模型组升高(P<0.05)。HUMSCs移植组的Aquaporin1蛋白水平较模型组和健康对照组均降低(P<0.05)。糖尿病肾病大鼠近端小管中无HIF-1α表达。结论HIF-1α主要在糖尿病肾病大鼠肾脏远端小管表达,且HUMSCs可通过抑制HIF-1α的表达修复肾小管的损伤。展开更多
目的研究二甲双胍(metformin,Met)通过抑制NF-κBNLRP3通路改善草酸钙(Calcium Oxalate,CaOx)诱导人肾小管上皮细胞(HK-2)损伤。方法分别随机将人肾小管上皮细胞分成对照组、实验组(CaOx+HK-2)、高浓度Met组(CaOx+HK-2+1.2 mM Met)、低...目的研究二甲双胍(metformin,Met)通过抑制NF-κBNLRP3通路改善草酸钙(Calcium Oxalate,CaOx)诱导人肾小管上皮细胞(HK-2)损伤。方法分别随机将人肾小管上皮细胞分成对照组、实验组(CaOx+HK-2)、高浓度Met组(CaOx+HK-2+1.2 mM Met)、低浓度Met组(CaOx+HK-2+0.80 mM Met)、通路干预组(CaOx+HK-2+PDTC)五组。各组细胞培养24 h,采用酶联免疫吸附测定(Elisa)法检测细胞上清液中炎症因子(IL-6、IL-18、IL-1β),采用逆转录-聚合酶链反应(RT-PCR)法检测细胞中NF-κB、NLRP3、骨桥蛋白(OPN)mRNA。结果各组间细胞上清液IL-6、IL-18、IL-1β含量相比差异均有统计学意义(P均<0.05);各组间细胞中NF-κBmRNA表达量、NLRP3mRNA表达量、OPNmRNA表达量相比差异均有统计学意义(P均<0.05)。结论1.20 mmol/L或0.80 mmol/L Met可以通过抑制NF-κB/NLRP3通路调控下游的炎症相关蛋白及黏附蛋白表达,继而改善CaOx诱导人肾小管上皮细胞损伤及减少草酸钙肾结石形成。展开更多
OBJECTIVE: To examine changes in the morphology and physiological functions of human proximal tubular epithelial cells (HK-2 cells) caused by total Dahuang (Radix Et Rhizoma Rhei Palmati) anthraquinones (TDA) and emod...OBJECTIVE: To examine changes in the morphology and physiological functions of human proximal tubular epithelial cells (HK-2 cells) caused by total Dahuang (Radix Et Rhizoma Rhei Palmati) anthraquinones (TDA) and emodin. METHODS: HK-2 cells were cultured on polycarbonate (PCF) membranes to form a complete monolayer of cells. A fluorescein isothiocyanate- dextran (FITC) permeability assay was conducted and secretion of γ-glutamyltranspeptidase (GGT), lactate dehydrogenase (LDH), N-acetyl-β-D-glucosaminidase (NAG) and kidney injury molecule 1 (KIM-1) was examined. The reabsorption of glucose and the excretion of para-aminohippuric acid (PAH) by HK-2 cells were also examined. The morphology of HK-2 cells was observed using optical microscopy and scanning electron microscopy. The cytoskeleton of HK-2 cells was observed under a fluorescence microscope. RESULTS: Compared with the results for the dimethyl sulfoxide group, treatment of cells with TDA and emodin showed statistically significant differences in the FITC leakage rate, the apical / basolateral ratio of LDH and GGT, and the secretion of GGT, LDH, NAG and KIM-1. At 64 μg/mL, TDA markedly inhibited blood glucose reabsorption and remarkably suppressed PAH excretion by HK-2 cells. Both TDA and emodin caused various degrees of damage to the morphology and cytoskeleton of HK-2 cells with the degree of damage correlating positively with the dosage of the tested substances.CONCLUSION: Both TDA and emodin caused damage to human renal proximal tubular epithelial cells at certain dosages. At the same dosage, TDA caused more severe damage than emodin to the HK-2 cells.展开更多
Objective To observe the effects of 7,8-dihydroxyflavone(7,8-DHF)on hypoxia induced endoplasmic reticulum stress(ERS)in human proximal tubular epithelial cells(HK-2).Methods The mRNA level of ERS associated biomarkers...Objective To observe the effects of 7,8-dihydroxyflavone(7,8-DHF)on hypoxia induced endoplasmic reticulum stress(ERS)in human proximal tubular epithelial cells(HK-2).Methods The mRNA level of ERS associated biomarkers was evaluated by RT-PCR assay展开更多
基金This work was supported by the grants from the National Natural Science Foundation of China （30470096）.
文摘Human primary epithelial cells of renal pelvis was established to investigate the adherence of uropathogenic Escherichia coli (UPEC) to this cell line, in which the primary cell culture was performed by using cultivation of the normal epithelium of renal pelvis in keratinocyte serum free medium (K-SFM) with epidermal growth factor (EGF) and bovine pituitary extract (BPE). Both UPEC132 obtained from urine specimen of patients with pyelonephritis and the pilus-free representative strain E. coli K-12p678-54 were used to study the adherence of these strains on human primary epithelial cells of renal pelvis. The UPEC adherence was performed with observation on the morphological changes of the adhered cells, while the adhesion rates and indices were calculated in different times of experiment. In addition, the virulence genes hly and cnf1 of UPEC132 were detected by multiplex PCR assay. In this study, the human primary epithelial cells of renal pelvis was found to exhibit the character of the transitional epithelial cells. Compared with the control group, the adhesion rates and indices began to increase from 15 min of the experiment time and reached its peak in 120 min. The adhesion rate and index of UPEC132 to human primary epithelial cells of renal pelvis were 74.4% and 34.0 respectively. Many microscopic changes in the primary cells adhered with UPEC132 could be detected, such as rounding or irregularity in shape, unevenness in staining and the cytoplasmic and nuclear changes. It suggests that human primary epithelial cells of renal pelvis can be used for the experiment on UPEC adhesion, thus providing a basis for the further study on the pathogenesis of UPEC.
基金supported by the National Natural Science Foundation of China(No.81300574)
文摘Carbon monoxide（CO）,as a vital small molecule in signaling pathways,is found to be involved in ischemia-reperfusion injury（IRI） in renal transplantation.CO-releasing molecule-2（CORM-2）,a CO-releasing molecule,is a type of metal carbonyl complexes which can quickly release CO in vivo.In this study,an in vitro oxidative stress injury model was established to examine the effect of CORM-2 pretreatment on the nuclear-cytoplasmic translocation of high mobility group box 1 protein（HMGB1） in mouse primary renal proximal tubular epithelial cells（RPTECs）.Immunofluorescence staining showed that HMGB1 in the medium-and CORM-2-treated groups was predominantly localized in the nucleus of the cells,whereas higher amounts of HMGB1 translocated to the cytoplasm in the H2O2-and inactive CORM-2（i CORM-2）-treated groups.Western blotting of HMGB1 showed that the total amounts of cytoplasmic HMGB1 in the H2O2-treated（0.59±0.27） and i CORM-2-treated（0.57±0.22） groups were markedly higher than those in the medium-treated（0.19±0.05） and CORM-2-treated（0.21±0.10） groups（P〈0.05）.Co-immunoprecipitation showed that the levels of acetylated HMGB1 in the H2O2-treated（642.98±57.25） and i CORM-2-treated（342.11±131.25） groups were markedly increased as compared with the medium-treated（78.72±74.17） and CORM-2-treated（71.42±53.35） groups（P〈0.05）,and no significant difference was observed between the medium-treated and CORM-2-treated groups（P〉0.05）.In conclusion,our study demonstrated that in the in vitro oxidative stress injury model of primary RPTECs,CORM-2 can significantly inhibit the nuclear-cytoplasmic translocation of HMGB1,which is probably associated with the prevention of HMGB1 acetylation.
基金ThisworkwassupportedbyagrantfromtheScience&TechnologyFoundationofHubeiProvince (No .2 0 0 3AA30 1C14 )
文摘To investigate the role of connective tissue growth factor (CTGF) in transdifferentiation of human renal tubular epithelial cell (HKC), in vitro cultured HKC cells were divided into 3 groups: negtive control, low dose CTGF-treated group (rh CTGF, 2.5 ng/ml) and high dose CTGF-treated (rhCTGF, 5.0 ng/ml). Then the expression of α-smooth muscle actin (α-SMA) were assessed by indirect immuno-fluorescence, and the percentage of α-SMA positive cells were assessed by flow cytometry. RT-PCR were also performed to examine the mRNA level of α-SMA. Upon the stimulation of different concentrations of rhCTGF, the expression of α-SMA were markedly stronger than that in negative controls. The percentages of α-SMA positive cells were significantly higher in the stimulated groups than that of negative controls (38.9 %, 65.5 % vs 2.4 %, P<0.01) .α-SMA mRNA levels were also up-regulated by the stimulation of rhCTGF (P<0.01). These results suggest that CTGF can promote the transdifferentiation of human renal tubular epithelial cells towards myofibroblast (Myo-F).
文摘To explore a new way of constructing bioartificial renal tubule assist device （RAD） in vitro and its function of transporting sodium （Na^＋） and glucose and to evaluate the application of atomic force microscope in the RAD construction, rat renal tubular epithelial cell line NRK-52E was cultured in vitro, seeded onto the outer surfaces of hollow fibers in a bioreactor, and then cultured for two weeks to construct RAD. Bioreactor hollow fibers without NRK-52E cells were used as control. The morphologies of attached cells were observed with scanning electron microscope, and the junctions of cells and polysulfone membrane were observed with atomic force microscope. Transportation of Na＋ and glucose was measured. Oubaine and phlorizin were used to inhibit the transporting property. The results showed that NRK-52E cells and polysulfone membrane were closely linked, as observed under atomic force microscope. After exposure to oubaine and phlorizin, transporting rates of Na^＋ and glucose were decreased significantly in the RAD group as compared with that in the control group （P〈0.01）. Furthermore, when the inhibitors were removed, transportation of Na^＋ and glucose was restored. It is concluded that a new RAD was constructed successfully in vitro, and it is able to selectively transport Na^＋ and glucose.
基金supported by the National Natural Science Foundation of China (81571396 and 81771528)Science, Technology and Innovation Commission of Shenzhen Municipality (JCYJ20170411090932146, JCYJ20170818110544730)。
文摘The mechanism of how SARS-CoV-2 causes severe multi-organ failure is largely unknown. Acute kidney injury(AKI) is one of the frequent organ damage in severe COVID-19 patients. Previous studies have shown that human renal tubule cells could be the potential host cells targeted by SARS-CoV-2. Traditional cancer cell lines or immortalized cell lines are genetically and phenotypically different from host cells. Animal models are widely used, but often fail to reflect a physiological and pathogenic status because of species tropisms. There is an unmet need for normal human epithelial cells for disease modeling. In this study, we successfully established long term cultures of normal human kidney proximal tubule epithelial cells(KPTECs) in 2 D and 3 D culture systems using conditional reprogramming(CR) and organoids techniques.These cells had the ability to differentiate and repair DNA damage, and showed no transforming property. Importantly, the CR KPTECs maintained lineage function with expression of specific transporters(SLC34 A3 and cubilin). They also expressed angiotensin-converting enzyme 2(ACE2), a receptor for SARS-CoV and SARS-CoV-2. In contrast, cancer cell line did not express endogenous SLC34 A3, cubilin and ACE2. Very interestingly, ACE2 expression was around twofold higher in 3 D organoids culture compared to that in 2 D CR culture condition. Pseudovirion assays demonstrated that SARS-CoV spike(S) protein was able to enter CR cells with luciferase reporter. This integrated 2 D CR and 3 D organoid cultures provide a physiological ex vivo model to study kidney functions, innate immune response of kidney cells to viruses, and a novel platform for drug discovery and safety evaluation.
文摘目的观察人脐带间充质干细胞(HUMSC)对糖尿病肾病大鼠肾脏缺氧诱导因子(HIF-1α)表达的影响。方法50只健康清洁级8周龄雄性SD大鼠,随机选取20只为健康对照组,其余30只采用链脲菌素复制糖尿病肾病大鼠模型(模型组),两组大鼠饲养12周。第12周,随机选取两组大鼠各3只分别尾静脉注射DiR-HUMSCs,代谢12~16 h后在小动物活体光学3D成像系统下观察DiR-HUMSCs在大鼠体内的分布。随机选取9只模型组大鼠进行HUMSCs移植(HUMSCs移植组)。HUMSCs移植采用尾静脉注射方式移植浓度为1×10^(6)个/mL HUMSCs 500μL至大鼠体内,每周1次,连续4周,共28 d。检测3组大鼠的24 h尿蛋白定量(24 h UPro)、血清肌酐(Scr)、血尿素氮(BUN)、尿肌酐(Ucr)、尿白蛋白与肌酐比值(UACR)水平;酶联免疫吸附试验(ELISA)检测3组大鼠血清HIF-1α水平;采用PAS和Masson染色进行肾脏组织病理检测;免疫荧光法检测3组大鼠肾组织HIF-1α、Slc12A3和Aquaporin1蛋白的表达。结果移植HUMSCs治疗4周后,与健康对照组比较,模型组和HUMSCs移植组大鼠Ucr水平降低(P<0.05),Scr、24 h UPro、BUN、UCAR均升高(P<0.05);与模型组比较,HUMSCs移植组大鼠Ucr水平差异无统计学意义(P>0.05),Scr、24 h UPro、BUN、UCAR均降低(P<0.05)。糖尿病肾病大鼠病理损伤缓解,系膜增生和基底膜增厚改善,小管空泡变性减少,间质纤维化减轻。模型组大鼠血清HIF-1α水平较健康对照组升高(P<0.05),HUMSCs移植组血清HIF-1α水平较模型组下降(P<0.05)。与健康对照组比较,模型组大鼠肾脏远端小管中HIF-1α蛋白水平增加(P<0.05);HUMSCs移植组的HIF-1α蛋白水平较模型组降低(P<0.05)。模型组远端小管标记蛋白Slc12A3水平低于健康对照组(P<0.05),HUMSCs移植组Slc12A3水平较模型组升高(P<0.05)。HUMSCs移植组的Aquaporin1蛋白水平较模型组和健康对照组均降低(P<0.05)。糖尿病肾病大鼠近端小管中无HIF-1α表达。结论HIF-1α主要在糖尿病肾病大鼠肾脏远端小管表达,且HUMSCs可通过抑制HIF-1α的表达修复肾小管的损伤。
文摘目的研究二甲双胍(metformin,Met)通过抑制NF-κBNLRP3通路改善草酸钙(Calcium Oxalate,CaOx)诱导人肾小管上皮细胞(HK-2)损伤。方法分别随机将人肾小管上皮细胞分成对照组、实验组(CaOx+HK-2)、高浓度Met组(CaOx+HK-2+1.2 mM Met)、低浓度Met组(CaOx+HK-2+0.80 mM Met)、通路干预组(CaOx+HK-2+PDTC)五组。各组细胞培养24 h,采用酶联免疫吸附测定(Elisa)法检测细胞上清液中炎症因子(IL-6、IL-18、IL-1β),采用逆转录-聚合酶链反应(RT-PCR)法检测细胞中NF-κB、NLRP3、骨桥蛋白(OPN)mRNA。结果各组间细胞上清液IL-6、IL-18、IL-1β含量相比差异均有统计学意义(P均<0.05);各组间细胞中NF-κBmRNA表达量、NLRP3mRNA表达量、OPNmRNA表达量相比差异均有统计学意义(P均<0.05)。结论1.20 mmol/L或0.80 mmol/L Met可以通过抑制NF-κB/NLRP3通路调控下游的炎症相关蛋白及黏附蛋白表达,继而改善CaOx诱导人肾小管上皮细胞损伤及减少草酸钙肾结石形成。
基金Supported by the Central Public Welfare Research Institutes Foundation-funded Project:A new research of renal toxicity early detection of Chinese medicine(ZZ0908035)Establishment of HK-2 cell monolayer model of human proximal renal tubular epithelial cells(ZXKT15022)+1 种基金Bioactivity based quality control for Chinese herbal medicine using Rhubarb as model system(GH2017-01-02)Natural Science Foundation-funded Project:Study on the bacterial endotoxin detection method of traditional Chinese medicine injections(90709043)
文摘OBJECTIVE: To examine changes in the morphology and physiological functions of human proximal tubular epithelial cells (HK-2 cells) caused by total Dahuang (Radix Et Rhizoma Rhei Palmati) anthraquinones (TDA) and emodin. METHODS: HK-2 cells were cultured on polycarbonate (PCF) membranes to form a complete monolayer of cells. A fluorescein isothiocyanate- dextran (FITC) permeability assay was conducted and secretion of γ-glutamyltranspeptidase (GGT), lactate dehydrogenase (LDH), N-acetyl-β-D-glucosaminidase (NAG) and kidney injury molecule 1 (KIM-1) was examined. The reabsorption of glucose and the excretion of para-aminohippuric acid (PAH) by HK-2 cells were also examined. The morphology of HK-2 cells was observed using optical microscopy and scanning electron microscopy. The cytoskeleton of HK-2 cells was observed under a fluorescence microscope. RESULTS: Compared with the results for the dimethyl sulfoxide group, treatment of cells with TDA and emodin showed statistically significant differences in the FITC leakage rate, the apical / basolateral ratio of LDH and GGT, and the secretion of GGT, LDH, NAG and KIM-1. At 64 μg/mL, TDA markedly inhibited blood glucose reabsorption and remarkably suppressed PAH excretion by HK-2 cells. Both TDA and emodin caused various degrees of damage to the morphology and cytoskeleton of HK-2 cells with the degree of damage correlating positively with the dosage of the tested substances.CONCLUSION: Both TDA and emodin caused damage to human renal proximal tubular epithelial cells at certain dosages. At the same dosage, TDA caused more severe damage than emodin to the HK-2 cells.
文摘Objective To observe the effects of 7,8-dihydroxyflavone(7,8-DHF)on hypoxia induced endoplasmic reticulum stress(ERS)in human proximal tubular epithelial cells(HK-2).Methods The mRNA level of ERS associated biomarkers was evaluated by RT-PCR assay
