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Diabetes and high-glucose could upregulate the expression of receptor for activated C kinase 1 in retina
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作者 Jian Tan Ang Xiao +3 位作者 Lin Yang Yu-Lin Tao Yi Shao Qiong Zhou 《World Journal of Diabetes》 SCIE 2024年第3期519-529,共11页
BACKGROUND Diabetic retinopathy(DR)is a major ocular complication of diabetes mellitus,leading to visual impairment.Retinal pigment epithelium(RPE)injury is a key component of the outer blood retinal barrier,and its d... BACKGROUND Diabetic retinopathy(DR)is a major ocular complication of diabetes mellitus,leading to visual impairment.Retinal pigment epithelium(RPE)injury is a key component of the outer blood retinal barrier,and its damage is an important indicator of DR.Receptor for activated C kinase 1(RACK1)activates protein kinase C-ε(PKC-ε)to promote the generation of reactive oxygen species(ROS)in RPE cells,leading to apoptosis.Therefore,we hypothesize that the activation of RACK1 under hypoxic/high-glucose conditions may promote RPE cell apoptosis by modulating PKC-ε/ROS,thereby disrupting the barrier effect of the outer blood retinal barrier and contributing to the progression of DR.AIM To investigate the role and associated underlying mechanisms of RACK1 in the development of early DR.METHODS In this study,Sprague-Dawley rats and adult RPE cell line-19(ARPE-19)cells were used as in vivo and in vitro models,respectively,to explore the role of RACK1 in mediating PKC-εin early DR.Furthermore,the impact of RACK1 on apoptosis and barrier function of RPE cells was also investigated in the former model.RESULTS Streptozotocin-induced diabetic rats showed increased apoptosis and upregulated expression of RACK1 and PKC-εproteins in RPE cells following a prolonged modeling.Similarly,ARPE-19 cells exposed to high glucose and hypoxia displayed elevated mRNA and protein levels of RACK1 and PKC-ε,accompanied by an increases in ROS production,apoptosis rate,and monolayer permeability.However,silencing RACK1 significantly downregulated the expression of PKC-εand ROS,reduced cell apoptosis and permeability,and protected barrier function.CONCLUSION RACK1 plays a significant role in the development of early DR and might serve as a potential therapeutic target for DR by regulating RPE apoptosis and barrier function. 展开更多
关键词 Diabetic retinopathy receptor for activated c kinase 1 Protein kinase c Adult retinal pigment epithelium cell line-19
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血清CXCR7、SGK1水平与急性心肌梗死经皮冠状动脉介入治疗术后预后不良的关系
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作者 杨汆 卫慧 +2 位作者 谭晓 孙晓艳 李秀珍 《疑难病杂志》 CAS 2024年第8期897-901,912,共6页
目的探讨血清C-X-C基序趋化因子受体7(CXCR7)、血清/糖皮质激素调节激酶1(SGK1)水平与急性心肌梗死(AMI)经皮冠状动脉介入治疗(PCI)术后预后不良的关系。方法选取2020年9月—2022年12月于南京医科大学第二附属医院急诊科接受PCI术的AMI... 目的探讨血清C-X-C基序趋化因子受体7(CXCR7)、血清/糖皮质激素调节激酶1(SGK1)水平与急性心肌梗死(AMI)经皮冠状动脉介入治疗(PCI)术后预后不良的关系。方法选取2020年9月—2022年12月于南京医科大学第二附属医院急诊科接受PCI术的AMI患者100例为AMI组,同期医院健康体检者50例为健康对照组,根据PCI术后1年预后情况将AMI患者分为预后不良亚组30例和预后良好亚组70例。采用酶联免疫吸附法检测血清CXCR7、SGK1水平;多因素Logistic回归分析AMI患者PCI术后预后不良的影响因素;建立受试者工作特征(ROC)曲线评价血清CXCR7、SGK1水平对AMI患者PCI术后预后不良的预测价值。结果与健康对照组比较,AMI组血清CXCR7水平降低,SGK1水平升高(t/P=9.613/<0.001、9.955/<0.001);100例AMI患者PCI术后1年不良预后发生率为30.00%(30/100);与预后良好亚组比较,预后不良亚组血清CXCR7水平降低,SGK1水平升高(t/P=6.254/<0.001、5.329/<0.001)。多因素Logistic回归显示,Gensini评分高、KILLIP分级≥Ⅲ级、SGK1升高为AMI患者PCI术后预后不良的独立危险因素[OR(95%CI)=1.071(1.025~1.119)、4.501(1.172~17.282)、1.132(1.046~1.224)],CXCR7升高为独立保护因素[OR(95%CI)=0.956(0.926~0.987)]。血清CXCR7、SGK1及二者联合预测AMI患者PCI术后预后不良的AUC分别为0.794、0.779、0.902,二者联合的AUC大于血清CXCR7、SGK1单独预测(Z/P=3.062/0.002、2.930/0.003)。结论AMI患者血清CXCR7水平降低、SGK1水平升高,是PCI术后不良预后的影响因素,二者联合对其预测价值较高。 展开更多
关键词 急性心肌梗死 经皮冠状动脉介入治疗 c-X-c基序趋化因子受体7 血清/糖皮质激素调节激酶1 预后不良
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多靶点药物治疗c-ros原癌基因1酪氨酸激酶阳性非小细胞肺癌研究进展
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作者 李亚辉 李婷 穆林 《新乡医学院学报》 CAS 2024年第7期695-700,共6页
c-ros原癌基因1酪氨酸激酶(ROS1)基因在非小细胞肺癌(NSCLC)中主要与CD74、SLC34A发生融合,其次与SDC4、EZR、TPM3、TFG、ZCCHC8、SLMAP和MYO5C等融合,ROS1融合基因均保留了ROS1的酪氨酸激酶结构域,异常活化时可以激活ROS1酪氨酸激酶区... c-ros原癌基因1酪氨酸激酶(ROS1)基因在非小细胞肺癌(NSCLC)中主要与CD74、SLC34A发生融合,其次与SDC4、EZR、TPM3、TFG、ZCCHC8、SLMAP和MYO5C等融合,ROS1融合基因均保留了ROS1的酪氨酸激酶结构域,异常活化时可以激活ROS1酪氨酸激酶区及下游信号通路,导致肿瘤的生长、增殖、迁移和侵袭。ROS1融合阳性NSCLC患者具有发病年龄小、可发生脑转移的特点,我国首次获批用于ROS1融合阳性NSCLC的药物有ROS1酪氨酸激酶抑制剂克唑替尼,但克唑替尼易发生耐药,克唑替尼的耐药机制以及耐药后的ROS1阳性NSCLC如何治疗成为亟需解决的问题,高效、安全的多靶点药物给ROS1阳性NSCLC患者带来曙光。本文就ROS1基因阳性NSCLC的多靶点药物及其耐药机制进行综述。 展开更多
关键词 非小细胞肺癌 c-ros原癌基因1酪氨酸激酶 多靶点药物 获得性耐药 新型药物
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妊娠期高血压疾病患者血清hs-CRP、sFlt-1水平变化及与妊娠结局的相关性
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作者 王燕枚 黄婷 胡娟娟 《中国医学创新》 CAS 2024年第3期1-5,共5页
目的:探讨妊娠期高血压疾病(HDP)患者血清可溶性血管内皮生长因子受体-1(sFlt-1)、超敏C反应蛋白(hs-CRP)水平变化及与妊娠结局的相关性。方法:收集2022年1月—2023年2月于赣州市妇幼保健院接受治疗的HDP患者108例作为病例组,并进行回... 目的:探讨妊娠期高血压疾病(HDP)患者血清可溶性血管内皮生长因子受体-1(sFlt-1)、超敏C反应蛋白(hs-CRP)水平变化及与妊娠结局的相关性。方法:收集2022年1月—2023年2月于赣州市妇幼保健院接受治疗的HDP患者108例作为病例组,并进行回顾性分析。根据病情严重程度将病例组患者分为妊娠期高血压组(43例)、子痫前期组(35例)、子痫组(30例),并选取同期正常妊娠的妇女82例作为对照组。分析所有研究对象中血清hs-CRP、sFlt-1水平变化情况。结果:病例组血清hs-CRP、sFlt-1水平均明显高于对照组(P<0.05)。妊娠期高血压组、子痫前期组、子痫组患者血清hs-CRP、sFlt-1水平比较差异均有统计学意义(P<0.05),且血清hs-CRP、sFlt-1水平随病情严重程度的加重而升高(P<0.05)。不良妊娠结局组患者血清hs-CRP、sFlt-1水平均高于妊娠结局良好组(P<0.05)。血清hs-CRP、s Flt-1水平反映HDP患者妊娠结局的AUC分别为0.758、0.763。相关性分析显示,hs-CRP、sFlt-1之间呈正相关(r=0.743,P<0.001)。结论:HDP患者血清中hs-CRP、sFlt-1水平均升高,且随疾病严重程度的加重而增加,并与妊娠结局有一定的相关性。 展开更多
关键词 妊娠期高血压疾病 妊娠结局 可溶性血管内皮生长因子受体-1 超敏c反应蛋白
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田蓟苷调节AMPK/SIRT1/PGC1α信号通路对脑出血大鼠认知功能和神经元损伤的影响
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作者 罗聪 钟崛 +4 位作者 邓敏敏 肖潇 黄丹霞 范慧 王盼 《中西医结合心脑血管病杂志》 2024年第2期274-279,共6页
目的:探讨田蓟苷(TIL)对脑出血(ICH)大鼠认知功能、神经元损伤及腺苷酸激活蛋白激酶(AMPK)/沉默调节蛋白1(SIRT1)/过氧化物酶体增殖活化受体γ辅助活化因子1α(PGC1α)信号通路的影响。方法:采用Ⅳ型胶原酶注射法构建ICH大鼠模型,将造... 目的:探讨田蓟苷(TIL)对脑出血(ICH)大鼠认知功能、神经元损伤及腺苷酸激活蛋白激酶(AMPK)/沉默调节蛋白1(SIRT1)/过氧化物酶体增殖活化受体γ辅助活化因子1α(PGC1α)信号通路的影响。方法:采用Ⅳ型胶原酶注射法构建ICH大鼠模型,将造模成功的ICH大鼠随机分为模型组(ICH组)、TIL组(16 mg/kg)、AMPK抑制剂组(Compound C组,250μg/kg)、TIL+AMPK抑制剂组(TIL+Compound C组),另设假手术组(Sham组),每组12只。采用改良的Garcia JH法、Morris水迷宫实验和敞箱实验评价大鼠的神经功能和认知功能;苏木素-伊红(HE)和脱氧核糖核苷酸末端转移酶介导的缺口末端标记(TUNEL)法行脑组织病理学和神经元凋亡观察;蛋白质印迹法(Western Blot)检测AMPK/SIRT1/PGC1α通路蛋白表达。结果:与Sham组相比,ICH组大鼠脑组织出现细胞核皱缩、排列紊乱等损伤,神经功能评分、穿越平台次数、垂直活动得分和水平活动得分、磷酸化AMPK(p-AMPK)/AMPK、SIRT1、PGC1α蛋白水平均明显下降(P<0.05),找寻平台时间、神经元凋亡率、半胱氨酸蛋白酶-3(Caspase-3)、B淋巴细胞瘤-2(Bcl-2)蛋白表达水平均明显增加(P<0.05);与ICH组相比,TIL组大鼠脑组织损伤减轻,神经功能评分、穿越平台次数、垂直活动得分和水平活动得分、p-AMPK/AMPK、SIRT1、PGC1α蛋白水平均明显增加(P<0.05),找寻平台时间、神经元凋亡率、Caspase-3、Bcl-2蛋白表达水平均明显降低(P<0.05);而Compound C组大鼠以上指标呈现相反的趋势。且TIL对ICH大鼠脑组织及认知功能的保护作用均被AMPK抑制剂Compound C减弱(P<0.05)。结论:TIL可能通过激活AMPK/SIRT1/PGC1α通路,改善ICH大鼠认知功能,减轻神经元损伤。 展开更多
关键词 脑出血 田蓟苷 腺苷酸激活蛋白激酶/沉默调节蛋白1/过氧化物酶体增殖活化受体γ辅助活化因子1α通路 认知功能 神经元 实验研究
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Role of Activator Protein-1 in the Transcription of Interleukin-5 Gene Regulated by Protein Kinase C Signal in Asthmatic Human TLymphocytes 被引量:2
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作者 郭琦 徐永健 张珍祥 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2005年第2期147-150,共4页
Summary: In order to explore the role of activator protein-1 (AP-1) in the transcription of interleukin-5 (IL-5) gene regulated by protein kinase C (PKC) signal in peripheral blood T lymphocytes from asthmatic patient... Summary: In order to explore the role of activator protein-1 (AP-1) in the transcription of interleukin-5 (IL-5) gene regulated by protein kinase C (PKC) signal in peripheral blood T lymphocytes from asthmatic patient, T lymphocytes were isolated and purified from peripheral blood of each asthmatic patient. The T lymphocytes were randomly divided into 4 groups: group A (blank control), group B (treated with PKC agonist phorbol 12-myristate 13-acetate (PMA)), Group C (treated with PMA and AP-1 cis-element decoy oligodeoxynucleotides (decoy ODNs)), and group D (treated with PMA and AP-1 mutant decoy ODNs). The ODNs were transfected into the T cells of group C and D by cation liposome respectively. Reverse transcription-polymerase chain reaction (RT-PCR) was employed to assess IL-5 mRNA expression, and electrophoretic mobility shift assays (EMSA) for the activation of AP-1. The results showed that the activation of AP-1 (88 003.58±1 626.57) and the expression of IL-5 mRNA (0.8300±0.0294) in T lymphocytes stimulated with PMA were significantly higher than these in blank control (20 888.47±1103.56 and 0.3050±0.0208, respectively, P< 0.01), while the indexes (23 219.83±1 024.86 and 0.3425±0.0171 respectively) of T lymphocytes stimulated with PMA and AP-1 decoy ODNs were significantly inhibited, as compared with group B (P< 0.01). The indexes (87 107.41±1 342.92 and 0.8225±0.0222, respectively) in T lymphocytes stimulated with PMA and AP-1 mutant decoy ODNs did not exhibit significant changes, as compared with group B (P>0.05). The significant positive correlation was found between the activation of AP-1 and the expression of IL-5 mRNA (P< 0.01). It was concluded that AP-1 might participate in the signal transduction of PKC-triggered transcription of IL-5 gene in asthmatic T lymphocytes. This suggests the activation of PKC/AP-1 signal transduction cascade of T lymphocytes may play an important role in the pathogenesis of asthma. 展开更多
关键词 protein kinase c activator protein-1 signal transduction bronchial asthma INTERLEUKIN-5 cis-element decoy oligodeoxynucleotides
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All-trans Retinoic Acid Diminishes Collagen Production in a Hepatic Stellate Cell Line via Suppression of Active Protein-1 and c-Jun N-terminal Kinase Signal 被引量:8
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作者 叶媛 但自力 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2010年第6期726-733,共8页
Following acute and chronic liver injury,hepatic stellate cells (HSCs) become activated to undergo a phenotypic transformation into myofibroblast-like cells and lose their retinol content,but the mechanisms of retinoi... Following acute and chronic liver injury,hepatic stellate cells (HSCs) become activated to undergo a phenotypic transformation into myofibroblast-like cells and lose their retinol content,but the mechanisms of retinoid loss and its potential roles in HSCs activation and liver fibrosis are not understood.The influence of retinoids on HSCs and hepatic fibrosis remains controversial.The purpose of this study was to evaluate the effects of all-trans retinoid acid (ATRA) on cell proliferation,mRNA expression of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)],profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),fibrolytic genes (MMP-3,MMP-13) and the upstream element (JNK and AP-1) in the rat hepatic stellate cell line (CFSC-2G).Cell proliferation was evaluated by measuring BrdU incorporation.The mRNA expression levels of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)],profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and fibrolytic genes (MMP-3,MMP-13) were quantitatively detected by using real-time PCR.The mRNA expression of JNK and AP-1 was quantified by RT-PCR.The results showed that ATRA inhibited HSCs proliferation and diminished the mRNA expression of collagen genes [procollagen α1 (Ⅰ),procollagen α1 (Ⅲ)] and profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and significantly stimulated the mRNA expression of MMP-3 and MMP-13 in HSCs by suppressing the mRNA expression of JNK and AP-1.These findings suggested that ATRA could inhibit proliferation and collagen production of HSCs via the suppression of active protein-1 and c-Jun N-terminal kinase signal,then decrease the mRNAs expression of profibrogenic genes (TGF-β 1,CTGF,MMP-2,TIMP-1,TIMP-2,PAI-1),and significantly induce the mRNA expression of MMP-3 and MMP-13. 展开更多
关键词 all trans-retinoic acid liver stellate cells cOLLAGEN transforming growth factor β 1 active protein-1 c-Jun N-terminal kinase.
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Mitogen-activated protein kinase phosphatase 1 protects PC12 cells from amyloid beta-induced neurotoxicity 被引量:7
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作者 Yue Gu Lian-Jun Ma +4 位作者 Xiao-Xue Bai Jing Jie Xiu-Fang Zhang Dong Chen Xiao-Ping Li 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第10期1842-1850,共9页
The mitogen-activated protein kinase(MAPK) signaling pathway plays an important role in the regulation of cell growth, proliferation, differentiation, transformation and death. Mitogen-activated protein kinase phosp... The mitogen-activated protein kinase(MAPK) signaling pathway plays an important role in the regulation of cell growth, proliferation, differentiation, transformation and death. Mitogen-activated protein kinase phosphatase 1(MKP1) has an inhibitory effect on the p38 MAPK and JNK pathways, but it is unknown whether it plays a role in Aβ-induced oxidative stress and neuronal inflammation. In this study, PC12 cells were infected with MKP1 sh RNA, MKP1 lentivirus or control lentivirus for 12 hours, and then treated with 0.1, 1, 10 or 100 μM amyloid beta 42(Aβ42). The cell survival rate was measured using the cell counting kit-8 assay. MKP1, tumor necrosis factor-alpha(TNF-α) and interleukin-1β(IL-1β) m RNA expression levels were analyzed using quantitative real time-polymerase chain reaction. MKP1 and phospho-c-Jun N-terminal kinase(JNK) expression levels were assessed using western blot assay. Reactive oxygen species(ROS) levels were detected using 2′,7′-dichlorofluorescein diacetate. Mitochondrial membrane potential was measured using flow cytometry. Superoxide dismutase activity and malondialdehyde levels were evaluated using the colorimetric method. Lactate dehydrogenase activity was measured using a microplate reader. Caspase-3 expression levels were assessed by enzyme-linked immunosorbent assay. Apoptosis was evaluated using the terminal deoxynucleotidyl transferase d UTP nick end labeling method. MKP1 overexpression inhibited Aβ-induced JNK phosphorylation and the increase in ROS levels. It also suppressed the Aβ-induced increase in TNF-α and IL-1β levels as well as apoptosis in PC12 cells. In contrast, MKP1 knockdown by RNA interference aggravated Aβ-induced oxidative stress, inflammation and cell damage in PC12 cells. Furthermore, the JNK-specific inhibitor SP600125 abolished this effect of MKP1 knockdown on Aβ-induced neurotoxicity. Collectively, these results show that MKP1 mitigates Aβ-induced apoptosis, oxidative stress and neuroinflammation by inhibiting the JNK signaling pathway, thereby playing a neuroprotective role. 展开更多
关键词 nerve regeneration mitogen-activated protein kinase phosphatase 1 c-Jun N-terminal kinase signaling pathway Alzheimer's disease neurons DEMENTIA apoptosis RNA interference lentivirus inflammation oxidative stress neural regeneration
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3D-QSAR Study on the Inhibitory Activity of Flavonoids on PIM-1 Kinase 被引量:1
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作者 邬旸 王甫洋 +2 位作者 于红霞 王遵尧 王连生 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2010年第8期1147-1154,共8页
20 Typical flavonoids were selected for study on the interaction between them and PIM-1 kinase with the comparative molecular field analysis method(CoMFA) as well as the comparative molecular similarity index analys... 20 Typical flavonoids were selected for study on the interaction between them and PIM-1 kinase with the comparative molecular field analysis method(CoMFA) as well as the comparative molecular similarity index analysis method(CoMSIA) based on molecule docking.3D-QSAR models between these flavonoids and receptor PIM-1 kinase were established.The obtained optimal cross-validation correlation coefficient Q2 for CoMFA model was 0.582,and the non-cross-validation correlation coefficient R2 was 0.955;the corresponding values for CoMSIA model were 0.790 and 0.974,respectively.These two models showed fairly fine stability and predictive ability.In addition,molecule docking results revealed the key residues in the receptor cavity and their specific action ways with flavonoids. 展开更多
关键词 FLAVONOIDS PIM-1 kinase receptor-ligand docking three-dimensional quantitative structure-activity relationship(3D-QSAR) cOMFA cOMSIA
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Distinct protein kinase C isozymes mediates inhibitory effects of different G-protein coupled receptors on cardiac rapidly activating delayed rectifier K ~ current
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《中国药理学通报》 CAS CSCD 北大核心 2015年第B11期165-166,共2页
Aim Evidence has shown that stimulation of alA-adrenorecetors receptor (alA-AR) or angiotensin II type 1 receptor (AT1R) acutely down-regulates the rapid component of the delayed rectifier K + current (IKr) via... Aim Evidence has shown that stimulation of alA-adrenorecetors receptor (alA-AR) or angiotensin II type 1 receptor (AT1R) acutely down-regulates the rapid component of the delayed rectifier K + current (IKr) via protein kinase C (PKC). This study was designed to investigate which PKC isozymes mediate down-regulations of IKr by alA-AR and AT1R. Method The whole-cell patch-clamp technique was used to record IKr in native cardio- myocytes and in human embryonic kidney (HEK) 293 cells co-transfected with human ether-a-go-go related gene (hERG) encoding α-subunit of IKr and human alA-AR or AT1R gene. Result In isolated guinea-pig ventricular cardiomyocytes the inhibitory action of Ang II on IKr was little affected by Go6976 (selectively inhibiting PKCα, β and γ) and Go6983 (selectively inhibiting PKCα, β, γ , δ, and ζ), but was significantly antagonized by an inter- nal dialysis with PKCe-selective inhibitory peptide εV1 -2. In contrast, the inhibitory action of alA-AR agonist A61603 on IKr was remarkably attenuated by Go6976 or Go6983, but not affected by peptide εV1 -2. Moreover, specific PKC-selective inhibitory peptide antagonized the effect of A61603. The results suggested that PKCe and PKCα isoform respectively mediated the inhibitory effect of AT1R and a1A-AR. In heterologous expression system, both PKCα and e-selective activator peptides down regulated hERG current with different manner. PKCα activator peptide shifted the activation curve of the channel to the right, but PKCe-selective activator peptide did not. Simi- larly, A61603 shifted the activation curve to the right, whereas Ang Ⅱ had no effect. In addition, both A61603 and PKCα activator peptide showed inhibitory action on bERG A PKC current (an bERG mutant in which 17 of the 18 ROSITE-predicted PKC acceptor serines/threonines were changed to alanine) with a similar potency to wild type bERG current. But, both Ang Ⅱ and PKCe-selective activator peptide exhibited no effects on bERG △ PKC cur- rent. The results indicated that PKCα and PKCe isoforms down-regulated bERG current through different mecha- nism. Conclusion PKCα and PKCe isoform respectively mediates the inhibition on IKr by stimulation of AT1R and alA-AR via different molecular mechanism. 展开更多
关键词 rapidly AcTIVATING delayed rectifier K + cURRENT protein kinase c AT1R alA-AR
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基于PGE2/PKC/TRPV1信号通路研究热敏灸对膝骨性关节炎兔镇痛效应机制 被引量:4
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作者 付勇 李琳慧 +7 位作者 廖璐 喻文 张波 黄仙保 黄辉 罗淑瑜 熊俊 章海凤 《辽宁中医杂志》 CAS 2023年第1期178-182,I0006,共6页
目的观察热敏灸对膝骨性关节炎(KOA)兔血清PGE2、背根神经节PKC、穴区皮肤TRPV1的影响,探讨其治疗KOA的作用机制。方法36只雄性普通级新西兰兔随机分为空白组(6只)、假手术组(6只)、造模组(24只)。采用木瓜蛋白酶溶液注射膝关节腔法造模... 目的观察热敏灸对膝骨性关节炎(KOA)兔血清PGE2、背根神经节PKC、穴区皮肤TRPV1的影响,探讨其治疗KOA的作用机制。方法36只雄性普通级新西兰兔随机分为空白组(6只)、假手术组(6只)、造模组(24只)。采用木瓜蛋白酶溶液注射膝关节腔法造模15d,假手术组关节腔内注射等量的0.9%NaCl溶液。造模成功后,造模组随机分成模型组(6只),艾灸组(18只),艾灸组艾灸“犊鼻”穴,每日1次,每次40 min,共7 d,根据兔艾灸过程中温度变化分为热敏灸组(10只)和非热敏灸组(7只),空白组、假手术组、模型组不予干预措施。干预结束后,肉眼、光镜下观察膝关节滑膜形态学变化;ELISA法检测血清PGE2表达;Real-time PCR法检测各组兔背根神经节PKC mRNA、穴区皮肤TRPV1 mRNA的含量。结果(1)干预后模型组兔膝关节腔内有大量积液,滑膜增生肥厚,伴有血管增生及大量炎症细胞成团聚集;热敏灸及非热敏灸组关节腔内积液减少,滑膜异常增生改善。(2)与空白组比较,模型组血清PGE2含量明显上升(P<0.01);与模型组比较,热敏灸组、非热敏灸组血清PGE2含量下降,差异有统计学意义(均P<0.01);与非热敏灸组比较,热敏灸组血清PGE2含量下降,差异有统计学意义(P<0.05)。(3)与空白组比较,模型组背根神经节PKC mRNA、穴区皮肤TRPV1 mRNA含量升高,差异有统计学意义(均P<0.01);与模型组比较,热敏灸及非热敏灸组PKC、TRPV1 mRNA表达下降,差异有统计学意义(均P<0.01);与非热敏灸组比较,热敏灸组PKC、TRPV1 mRNA表达下降,差异有统计学意义(P<0.05)。结论热敏灸可抑制PGE2、PKC、TRPV1的高表达,从而抑制痛觉过敏,减轻KOA滑膜炎性反应,缓解关节损害,这可能是热敏灸治疗KOA的效应机制之一。 展开更多
关键词 热敏灸 膝骨性关节炎 前列腺素E2 蛋白激酶c 瞬时感受器电位香草酸受体1
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TRPA1通过PLC/PKC信号通路对偏头痛大鼠的行为学和疼痛敏感性的影响 被引量:2
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作者 焦燕 李三峰 李红燕 《河北医药》 CAS 2023年第6期805-809,共5页
目的 探讨瞬时受体电位锚蛋白1(TRPA1)通过磷酯酶C(PLC)/蛋白激酶C(PKC)信号通路对偏头痛大鼠的行为学和疼痛敏感性的影响。方法 将SD大鼠随机分为对照组、模型组、TRPA1敲低组(腺病毒包装的TRPA1 siRNA载体)、TRPA1空载组(空慢病毒载体... 目的 探讨瞬时受体电位锚蛋白1(TRPA1)通过磷酯酶C(PLC)/蛋白激酶C(PKC)信号通路对偏头痛大鼠的行为学和疼痛敏感性的影响。方法 将SD大鼠随机分为对照组、模型组、TRPA1敲低组(腺病毒包装的TRPA1 siRNA载体)、TRPA1空载组(空慢病毒载体)、TRPA1敲低+PMA(PKC激活剂)组,每组12只,分组以腺病毒包装的TRPA1 siRNA载体、空慢病毒载体及PMA干预处理24 h后,模型组与给药干预组皮下注射10 mg/kg硝酸甘油以制备偏头痛大鼠模型,对照大鼠组皮下注射等剂量0.9%氯化钠溶液,然后以qRT-PCR实验检测除TRPA1敲低+PMA组外其余5组大鼠脑组织及血液中TRPA1 mRNA的表达;观察5组大鼠行为,记录其耳红消失时间及一段时间内挠头次数、爬笼次数;检测5组大鼠机械性疼痛及温度痛阈;酶标仪检测5组大鼠血清促炎因子前列腺素E2(PGE2)、白介素(IL)-6及抗炎因子IL-10水平;免疫印迹实验检测5组大鼠脑组织PLC/PKC通路相关蛋白表达。结果 与对照组比较,模型组、TRPA1空载组大鼠缩头阈值、热刺激潜伏期、血清IL-10水平显著降低(P<0.05),脑组织及外周血中TRPA1表达、耳红消失时间、挠头次数、爬笼次数、动态痛觉超敏评分、血清PGE2、IL-6水平、脑组织PLC/PKC通路蛋白p-PLC/PLC、p-PKC/PKC显著升高(P<0.05)。与模型组比较,TRPA1敲低组大鼠缩头阈值、热刺激潜伏期、血清IL-10水平升高(P<0.05),脑组织及外周血中TRPA1表达、耳红消失时间、挠头次数、爬笼次数、动态痛觉超敏评分、血清PGE2、IL-6水平、脑组织PLC/PKC通路蛋白p-PLC/PLC、p-PKC/PKC降低(P<0.05);TRPA1空载组大鼠各指标无显著变化(P>0.05)。与TRPA1敲低组比较,TRPA1敲低+PMA组大鼠缩头阈值、热刺激潜伏期、血清IL-10水平降低(P<0.05),耳红消失时间、挠头次数、爬笼次数、动态痛觉超敏评分、血清PGE2、IL-6水平、脑组织PLC/PKC通路蛋白p-PKC/PKC升高(P<0.05)。结论 TRPA1可通过调控PLC/PKC信号通路介导大鼠偏头痛的发生,下调TRPA1表达可通过抑制PLC/PKC信号通路激活减轻炎症,以降低大鼠疼痛敏感性,最终改善头疼症状。 展开更多
关键词 瞬时受体电位锚蛋白1 磷酯酶c/蛋白激酶c 偏头痛 行为学 疼痛敏感性
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克唑替尼靶向治疗间变性淋巴瘤激酶与C-ros原癌基因1-受体酪氨酸激酶融合基因阳性晚期非小细胞肺癌患者的效果分析
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作者 李莉 赵振慧 +4 位作者 李妍 马小平 刘丹 李冰玉 赵兵 《中国医药》 2023年第11期1627-1631,共5页
目的分析克唑替尼靶向治疗间变性淋巴瘤激酶(ALK)、C-ros原癌基因1-受体酪氨酸激酶(ROS1)融合基因阳性晚期非小细胞肺癌(NSCLC)患者的效果。方法选取2020年6月至2022年6月来新疆医科大学附属肿瘤医院就诊的123例ALK阳性(ALK组)、15例ROS... 目的分析克唑替尼靶向治疗间变性淋巴瘤激酶(ALK)、C-ros原癌基因1-受体酪氨酸激酶(ROS1)融合基因阳性晚期非小细胞肺癌(NSCLC)患者的效果。方法选取2020年6月至2022年6月来新疆医科大学附属肿瘤医院就诊的123例ALK阳性(ALK组)、15例ROS1阳性(ROS1组)晚期NSCLC患者为研究对象,所有患者均给予克唑替尼治疗,并纳入同期来本院进行健康检查的50名健康志愿者作为对照组。比较对照组入组时以及ALK组和ROS1组治疗前及治疗1、3个月后的循环肿瘤细胞(CTCs)、循环肿瘤DNA(CTDNA)、循环血液外泌体微小RNA-145(miR-145)、miR-200水平及ALK、ROS1阳性率。结果治疗前ALK组和ROS1组CTCs和CTDNA水平均高于对照组,差异均有统计学意义(均P<0.05)。治疗1、3个月后ALK组和ROS1组患者的CTCs水平逐渐降低,CTDNA水平先升高后降低,与治疗前比较差异均有统计学意义[ALK组:(7.84±0.91)、(5.17±0.87)比(11.53±3.52),(7.19±1.13)、(4.02±0.95)比(5.49±1.17);ROS1组:(8.05±1.16)、(5.86±0.92)比(12.71±4.08),(7.42±1.24)、(4.55±1.14)比(5.66±1.32)](均P<0.05)。治疗前ALK组和ROS1组miR-145水平均低于对照组、miR-200水平均高于对照组,差异均有统计学意义(均P<0.05)。治疗1、3个月后ALK组和ROS1组患者的miR-145水平均升高,miR-200水平均降低,与治疗前比较差异均有统计学意义(均P<0.05)。对照组ALK、ROS1阳性率均为0。治疗1、3个月后ALK组和ROS1组患者的ALK、ROS1阳性率均低于治疗前,差异均有统计学意义(均P<0.05)。结论克唑替尼靶向治疗ALK、ROS1融合基因阳性晚期NSCLC能够通过调节患者CTCs、CTDNA、miR-145、miR-200水平而降低ALK、ROS1阳性表达率。 展开更多
关键词 非小细胞肺癌 克唑替尼 间变性淋巴瘤激酶 c-ros原癌基因1-受体酪氨酸激酶 融合基因 靶向治疗
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活化激酶C受体1、四个半LIM结构域蛋白1在食管鳞状细胞癌中的表达及与患者预后的关系
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作者 乔滨 刘孝民 +1 位作者 肖中岳 孙佳春 《癌症进展》 2023年第7期743-745,757,共4页
目的探讨活化激酶C受体1(RACK1)、四个半LIM结构域蛋白1(FHL1)在食管鳞状细胞癌(ESCC)中的表达及与患者预后的关系。方法选取122例局部晚期ESCC患者,取其ESCC组织及癌旁组织,免疫组化法检测RACK1、FHL1的表达情况,并比较不同临床疗效ESC... 目的探讨活化激酶C受体1(RACK1)、四个半LIM结构域蛋白1(FHL1)在食管鳞状细胞癌(ESCC)中的表达及与患者预后的关系。方法选取122例局部晚期ESCC患者,取其ESCC组织及癌旁组织,免疫组化法检测RACK1、FHL1的表达情况,并比较不同临床疗效ESCC患者ESCC组织中RACK1、FHL1表达情况。局部晚期ESCC患者预后的影响因素采用多元Logistic回归分析。结果ESCC组织中RACK1、FHL1蛋白阳性表达率均明显低于癌旁组织,差异均有统计学意义(P﹤0.01)。依据实体瘤疗效评价标准,有效87例,无效35例,有效ESCC患者ESCC组织中RACK1、FHL1阳性表达率均高于无效患者,差异均有统计学意义(P﹤0.05)。多因素Logistic分析结果显示,淋巴结转移、分化程度为低分化、肿瘤直径≥5 cm、RACK1阴性表达、FHL1阴性表达均是局部晚期ESCC患者预后死亡的独立危险因素(P﹤0.01)。结论RACK1、FHL1在局部晚期ESCC组织中阳性表达率较低,可作为评估紫杉醇联合顺铂化疗疗效、患者预后的可靠指标。 展开更多
关键词 活化激酶c受体1 食管鳞状细胞癌 四个半LIM结构域蛋白1 化疗 预后
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预后营养指数及血清suPAR、TK1在晚期肝癌预后中的预测价值
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作者 刘扬 车瑾 +3 位作者 秦婷婷 曹蔚 张园园 徐洋 《肿瘤代谢与营养电子杂志》 2024年第1期110-115,共6页
目的探索预后营养指数(PNI)及血清可溶性尿激酶型纤溶酶原激活物受体(suPAR)、胸苷激酶1(TK1)在晚期肝癌表达意义以及在预后评估中预测的应用价值。方法选取2019年2月至2021年2月收集的92例晚期肝癌患者进行回顾性分析,均进行PNI评估及... 目的探索预后营养指数(PNI)及血清可溶性尿激酶型纤溶酶原激活物受体(suPAR)、胸苷激酶1(TK1)在晚期肝癌表达意义以及在预后评估中预测的应用价值。方法选取2019年2月至2021年2月收集的92例晚期肝癌患者进行回顾性分析,均进行PNI评估及血清suPAR、TK1检测,比较两组PNI、suPAR、TK1水平。同时,根据患者是否死亡,分为预后不良组(n=28,死亡),预后良好组(n=64,生存),经多因素Cox回归模型分析影响晚期肝癌患者预后独立危险因素,经受试者操作特征(ROC)曲线分析PNI、suPAR、TK1的诊断价值。结果经单因素分析,血管侵犯、门静脉癌栓会对晚期肝癌预后造成影响(P<0.05),且预后不良组PNI低于预后良好组,suPAR、TK1水平高于预后良好组,差异有统计学意义。Kaplan-Meier生存分析显示,PNI高表达、suPAR低表达、TK1低表达、无血管侵犯、无门静脉癌栓者生存时间显著高于PNI低表达、suPAR高表达、TK1高表达、有血管侵犯、有门静脉癌栓者,差异有统计学意义(P<0.05);经多因素Cox回归模型分析,PNI低表达、suPAR高表达、TK1高表达是影响晚期肝癌患者预后的独立危险因素(P<0.05)。经ROC曲线分析,PNI、suPAR、TK1及3项联合诊断晚期肝癌预后的曲线下面积分别为0.818、0.827、0.801、0.957。结论晚期肝癌患者血清suPAR、TK1水平升高,PNI降低,PNI、suPAR、TK1可作为一项简捷而有效的指标,来协助评估晚期肝癌患者的病情严重程度及预后。 展开更多
关键词 预后营养指数 可溶性尿激酶型纤溶酶原激活物受体 胸苷激酶1 肝癌 预后
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川穹嗪调节SIRT1/AMPK/PGC1α信号通路对偏头痛大鼠镇痛作用及神经元损伤的影响 被引量:4
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作者 胡滨 王大斌 郭茂 《天津医药》 CAS 北大核心 2023年第4期382-387,共6页
目的 探究川穹嗪(TMP)通过调控沉默信息调节因子2相关酶1(SIRT1)/腺苷酸活化蛋白激酶(AMPK)/过氧化物酶体增殖物激活受体γ共激活因子1α(PGC1α)信号通路对偏头痛大鼠发挥镇痛和神经元损伤的保护作用。方法 通过硝酸甘油诱导建立偏头... 目的 探究川穹嗪(TMP)通过调控沉默信息调节因子2相关酶1(SIRT1)/腺苷酸活化蛋白激酶(AMPK)/过氧化物酶体增殖物激活受体γ共激活因子1α(PGC1α)信号通路对偏头痛大鼠发挥镇痛和神经元损伤的保护作用。方法 通过硝酸甘油诱导建立偏头痛大鼠模型,造模成功后随机分为模型(M)组、TMP低剂量(TMP-L)组(50 mg/kg)、TMP中剂量(TMP-M)组(100 mg/kg)、TMP高剂量(TMP-H)组(200 mg/kg)、TMP(200 mg/kg)+SIRT1抑制剂(EX527,5 mg/kg)组,每组10只;另取10只作为正常对照(NC)组。连续灌胃2周。给药结束24 h后,记录各组大鼠在连续30 min内出现挠头、爬笼的次数,进行行为学评分;测定机械性刺激及热刺激痛阈;酶联免疫吸附试验法检测血清中一氧化氮(NO)、白细胞介素(IL)-6、IL-1β含量和脑组织中5-羟色胺(5-HT)、去甲肾上腺素(NE)、多巴胺(DA)含量;TUNEL染色观察脑组织神经元凋亡情况;Western blot法检测脑组织中SIRT1、AMPK、p-AMPK、PGC1α蛋白表达。结果 与NC组比较,M组大鼠行为学评分,血清中NO、IL-6、IL-1β水平,神经元凋亡率升高(P<0.05);机械性刺激痛阈值降低,热刺激潜伏期缩短(P<0.05);脑组织中5-HT、NE、DA水平,p-AMPK/AMPK比值,SIRT1、PGC1α蛋白表达降低(P<0.05)。与M组比较,TMP各剂量组大鼠行为学评分,血清中NO、IL-6、IL-1β水平,神经元凋亡率降低(P<0.05);机械性刺激痛阈值升高,热刺激潜伏期延长(P<0.05);脑组织中5-HT、NE、DA水平,pAMPK/AMPK比值,SIRT1、PGC1α蛋白表达升高(P<0.05);与TMP-H组比较,TMP+EX527组可显著逆转TMP对偏头痛大鼠的作用。结论 TMP可能通过调节SIRT1/AMPK/PGC1α信号通路的表达,改善神经元损伤,发挥对偏头痛大鼠的镇痛作用。 展开更多
关键词 偏头痛 镇痛 神经元 AMP活化蛋白激酶类 过氧化物酶体增殖物激活受体γ共激活因子1α 一氧化氮 白细胞介素6 白细胞介素1Β 川穹嗪 沉默信息调节因子2相关酶1
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五味子丙素通过SIRT1/PGC-1α/NRF1通路减轻脂多糖诱导的大鼠心肌细胞氧化应激损伤机制的研究 被引量:2
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作者 杜孝林 刘寅 杨亚男 《沈阳药科大学学报》 CAS CSCD 北大核心 2023年第8期1044-1050,共7页
目的探讨五味子丙素通过沉默信息调节因子2相关酶1(silencing information regulator 2 related enzyme 1,SIRT1)/过氧化物酶体增殖物激活受体γ辅助激活物1α(peroxisome proliferator activated receptorγcoactivator-1α,PGC-1α)/... 目的探讨五味子丙素通过沉默信息调节因子2相关酶1(silencing information regulator 2 related enzyme 1,SIRT1)/过氧化物酶体增殖物激活受体γ辅助激活物1α(peroxisome proliferator activated receptorγcoactivator-1α,PGC-1α)/核呼吸因子1(nuclear respiratory factor 1,NRF1)通路对脂多糖(lipopolysaccharide,LPS)诱导的大鼠心肌细胞氧化应激损伤的影响机制。方法通过LPS诱导建立大鼠心肌细胞损伤模型。将正常培养的大鼠心肌细胞H9c2分组为:对照组、LPS组、LPS+低剂量五味子丙素组、LPS+中剂量五味子丙素组、LPS+高剂量五味子丙素组、LPS+高剂量五味子丙素+SIRT1/PGC-1α/NRF1通路抑制剂尼克酰胺(niacinamide,NA)组。MTT法检测细胞存活率;试剂盒检测乳酸脱氢酶(lactate dehydrogenase,LDH)、丙二醛(malondialdehyle,MDA)、超氧化物歧化酶(superaxide dismutase,SOD)、还原性谷胱甘肽(glutathione,GSH)、氨基转移酶(aspartate aminotransferase,AST)、磷酸肌酸激酶(creatine pho sphate kinase,CPK)和活性氧(reactive oxygen species,ROS)含量;流式细胞仪检测凋亡率;western blot检测SIRT1、PGC-1α、NRF1蛋白表达水平。结果与模型组比较,低、中、高剂量五味子丙素能够依次提高LPS诱导的H9c2细胞存活率、SOD和GSH活性及SIRT1、PGC-1α、NRF1蛋白表达水平,同时依次降低凋亡率、AST、CPK、LDH、MDA和ROS水平(P<0.05)。SIRT1/PGC-1α/NRF1通路抑制剂NA可逆转五味子丙素对LPS诱导H9c2细胞氧化应激损伤的保护作用(P<0.05)。结论五味子丙素可能通过激活SIRT1/PGC-1α/NRF1通路减轻LPS诱导的H9c2细胞氧化应激损伤。 展开更多
关键词 五味子丙素 沉默信息调节因子2相关酶1 过氧化物酶体增殖物激活受体γ辅助激活物1α 核呼吸因子 脂多糖 心肌细胞 氧化应激
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加味当归补血汤对糖尿病肾病大鼠AMPK及PGC-1α的影响及相关作用机制 被引量:2
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作者 丁鑫 顾悦 +3 位作者 王逸凡 申宇航 张宇翔 郭登洲 《暨南大学学报(自然科学与医学版)》 CAS 北大核心 2023年第2期147-156,185,共11页
目的:观察加味当归补血汤(MDBT)对糖尿病肾病(DKD)大鼠单磷酸腺苷激活蛋白激酶(AMPK)及过氧化物酶体增殖物激活受体γ辅激活因子1α(PGC-1α)活性的影响,探讨其治疗DKD的可能机制。方法:52只SD雄性大鼠随机分为正常组(CON)8只和造模组4... 目的:观察加味当归补血汤(MDBT)对糖尿病肾病(DKD)大鼠单磷酸腺苷激活蛋白激酶(AMPK)及过氧化物酶体增殖物激活受体γ辅激活因子1α(PGC-1α)活性的影响,探讨其治疗DKD的可能机制。方法:52只SD雄性大鼠随机分为正常组(CON)8只和造模组44只。后随机将40只成模大鼠分为模型组(MOD)、厄贝沙坦组(IRB)、加味当归补血汤高剂量组(MDBTH)、加味当归补血汤中剂量组(MDBTM)、加味当归补血汤低剂量组(MDBTL),8只/组。药物组灌相应药物,CON组予等体积生理盐水,1次/d,持续20周。检测各组大鼠24 h尿蛋白(24 h-UTP)水平、血清锰超氧化物歧化酶(MnSOD)及丙二醛(MDA)活性;观察大鼠肾组织病理变化;免疫组化法(IHC)及Western blot法检测肾组织磷酸化AMPK(p-AMPK)、PGC-1α蛋白表达。结果:与CON组比较,MOD组24 h-UTP及血清MDA水平显著升高,MnSOD活性显著降低(P<0.01);病理表现为肾小管和肾小囊严重分离,肾小球内基底膜均匀性增厚,球内糖原沉积;肾组织中p-AMPK、PGC-1α蛋白表达水平显著降低(P<0.01)。与MOD组比较,MDBTH与IRB组24 h-UTP及血清MDA水平显著下降,MnSOD活性显著提高(P<0.01);肾组织病理表现明显改善;p-AMPK、PGC-1α在肾组织的表达显著增加(P<0.01)。结论:加味当归补血汤可能通过激活AMPK及PGC-1α的表达改善DKD大鼠氧化应激,降低肾脏病理损害程度,减少蛋白尿,从而有效保护肾脏,缓解DKD进展。 展开更多
关键词 加味当归补血汤 糖尿病肾病(DKD) 过氧化物酶体增殖物激活受体γ辅激活因子1α(PGc-1α) 单磷酸腺苷激活蛋白激酶(AMPK) 氧化应激
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Protective Effects of Activated Protein C on Neurovascular Unit in a Rat Model of Intrauterine Infection-Induced Neonatal White Matter Injury 被引量:3
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作者 金圣娟 刘艳 +5 位作者 邓诗桦 林土连 Abid Rashid 廖立红 宁琴 罗小平 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2015年第6期904-909,共6页
Summary: Activated protein C (APC), a natural anticoagulant, has been reported to exert direct vascu- loprotective, neural protective, anti-inflammatory, and proneurogenic activities in the central nervous system. ... Summary: Activated protein C (APC), a natural anticoagulant, has been reported to exert direct vascu- loprotective, neural protective, anti-inflammatory, and proneurogenic activities in the central nervous system. This study was aimed to explore the neuroprotective effects and potential mechanisms of APC on the neurovascular unit of neonatal rats with intrauterine infection-induced white matter injury. In- traperitoneal injection of 300 ~tg/kg lipopolysaccharide (LPS) was administered consecutively to preg- nant Sprague-Dawley rats at embryonic days 19 and 20 to establish the rat model of intrauterine infec- tion-induced white matter injury. Control rats were injected with an equivalent amount of sterile saline on the same time. APC at the dosage of 0.2 mg/kg was intraperitoneally injected to neonatal rats imme- diately after birth. Brain tissues were collected at postnatal day 7 and stained with hematoxylin and eo- sin (H&E). Immunohistochemistry was used to evaluate myelin basic protein (MBP) expression in the periventricular white matter region. Blood-brain barrier (BBB) permeability and brain water content ~were measured using Evens Blue dye and wet/dry weight method. Double immunofluorescence staining and real-time quantitative PCR were performed to detect microglial activation and the expression of protease activated receptor 1 (PAR1). Typical pathological changes of white matter injury were ob- served in rat brains exposed to LPS, and MBP expression in the periventricular region was significantly decreased. BBB was disrupted and the brain water content was increased. Microglia were largely acti- vated and the mRNA and protein levels of PAR1 were elevated. APC administration ameliorated the pathological lesions of the white matter and increased MBP expression. BBB permeability and brain water content were reduced. Microglia activation was inhibited and the PAR1 mRNA and protein ex- pression levels were both down-regulated. Our results suggested that APC exerted neuroprotective ef- fects on multiple components of the neurovascular unit in neonatal rats with intrauterine infec- tion-induced white matter injury, and the underlying mechanisms might involve decreased expression of PAR1. 展开更多
关键词 activated protein c white matter injury neurovascular unit intrauterine infection proteaseactivated receptor 1
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基于JNK/AP-1信号通路探讨广西毛冬青在放射性脑损伤中的作用机制
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作者 何改改 李婷 +4 位作者 张馨月 孔蔺莎 阮林 王绍军 韦力 《广西医科大学学报》 CAS 2024年第1期58-66,共9页
目的:探讨广西毛冬青(IPH)对放射性脑损伤的改善作用及其机制。方法:将40只SPF级昆明小鼠随机分为对照组、IPH、放射组和放射+IPH组,每组10只。采用γ射线建立放射性脑损伤模型,放射前、后连续灌胃给药14 d。采用Morris水迷宫实验、避... 目的:探讨广西毛冬青(IPH)对放射性脑损伤的改善作用及其机制。方法:将40只SPF级昆明小鼠随机分为对照组、IPH、放射组和放射+IPH组,每组10只。采用γ射线建立放射性脑损伤模型,放射前、后连续灌胃给药14 d。采用Morris水迷宫实验、避暗实验检测小鼠认知功能,苏木精—伊红(HE)染色和尼氏染色观察脑组织病理形态变化,电镜观察胶质细胞超微结构,酶联免疫吸附试验(ELISA)法检测血清白介素-6(IL-6)水平,免疫组织化学染色法检测脑组织c-Jun氨基末端激酶(JNK)、磷酸化(p-)JNK、激活蛋白-1(AP-1)和单核细胞趋化蛋白-1(MCP-1)蛋白表达,免疫荧光检测脑组织星型胶质细胞标记物GFAP和小胶质细胞标记物Iba-1蛋白表达,western blotting法检测脑组织JNK和p-JNK蛋白表达。结果:与对照组相比,放射组小鼠放射后7 d体重减低,血清IL-6含量升高,脑组织AP-1、MCP-1表达水平及p-JNK/JNK比值升高,小胶质细胞Iba-1和GFAP表达水平升高(均P<0.05)。与放射组比较,放射+IPH组小鼠放射后7 d体重增加,血清IL-6含量降低,脑组织AP-1、MCP-1表达水平及p-JNK/JNK比值降低,小胶质细胞Iba-1和GFAP表达水平降低(均P<0.05)。HE染色和尼氏染色显示,放射组大量细胞和神经元出现核固缩现象,小胶质细胞激活,呈圆形;电镜下可见细胞内溶酶体增多,星形胶质细胞细胞核及胞质肿胀;经IPH干预后,小鼠脑组织神经元变性情况和胶质细胞形态明显改善。结论:广西IPH能改善放射性脑损伤小鼠的认知功能,减少小胶质细胞和星形胶质细胞激活,其机制可能与减轻神经炎症反应、抑制JNK/AP-1信号通路有关。 展开更多
关键词 广西毛冬青 放射性脑损伤 JNK/AP-1 炎症反应 认知障碍
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