期刊文献+
共找到131篇文章
< 1 2 7 >
每页显示 20 50 100
基于酿酒酵母细胞构建靶向囊泡相关膜蛋白2的肉毒神经毒素检测系统 被引量:1
1
作者 蒋瑶 陈世林 +2 位作者 李雨晴 谌佳 中西秀树 《生物工程学报》 北大核心 2025年第5期2132-2144,共13页
肉毒神经毒素(botulinum neurotoxins,BoNTs)是一种神经毒性蛋白质,可水解参与突触囊泡融合的可溶性N-乙基马来酰亚胺敏感因子附着蛋白受体(soluble N-ethylmaleimide factor attachment protein receptor,SNARE)。其中,囊泡相关膜蛋白(... 肉毒神经毒素(botulinum neurotoxins,BoNTs)是一种神经毒性蛋白质,可水解参与突触囊泡融合的可溶性N-乙基马来酰亚胺敏感因子附着蛋白受体(soluble N-ethylmaleimide factor attachment protein receptor,SNARE)。其中,囊泡相关膜蛋白(synaptobrevin-2,Sb2)是BoNTs主要靶向的SNARE蛋白之一。本研究旨在开发一种基于酵母的BoNTs检测系统,用于分析靶向Sb-2的BoNTs。鉴于SNARE蛋白在真核生物中的高度保守性,Snc1和Snc2是酿酒酵母中Sb-2的同源物,本研究构建了功能性的SNARE嵌合蛋白,其中Snc2中的SNARE结构域的一部分被Sb-2的相应区域所取代,从而Snc2/Sb2-4嵌合蛋白可以被BoNTs所识别。由于Snc1和Snc2是酵母产孢所必需的,因此在携带Snc2/Sb2-4嵌合蛋白的snc1Δsnc2Δ酵母中,靶向Sb-2蛋白的BoNTs(包括BoNT/B在内)表达后显著降低了孢子的形成效率。然而,在野生型酵母中,BoNTs表达的影响可以忽略不计。产孢效率在本研究中被用作检验BoNTs活性的指标。这种方法的优点在于可以通过荧光比色法来评估酵母的产孢效率,进而反映出BoNTs的活性。最终,本研究基于酵母细胞构建的体系不仅能够简单便捷地分析BoNTs,还能够用于挖掘未鉴定的BoNTs和BoNTs抑制剂。鉴于BoNTs广泛应用于临床和美容领域,该体系有望为发现和优化具有应用价值的BoNTs提供有力支持。 展开更多
关键词 肉毒神经毒素 囊泡相关膜蛋白 可溶性N-乙基马来酰亚胺敏感因子附着蛋白受体(SNARE) 酿酒酵母 孢子
原文传递
SNARE复合物在自噬及相关疾病中的研究进展
2
作者 李彩银 刘源 +3 位作者 郭柔佳 卜晶晶 闫向丽 栗俞程 《中国病理生理杂志》 北大核心 2025年第1期188-194,共7页
自噬是真核生物中普遍存在的一种保守的生理现象,在饥饿或营养缺乏时通过降解细胞内的蛋白质和细胞器以促进细胞存活。自噬功能障碍与多种疾病密切相关。可溶性N-乙基马来酰亚胺敏感因子附着蛋白受体(soluble N-elthylmaleimide-sensiti... 自噬是真核生物中普遍存在的一种保守的生理现象,在饥饿或营养缺乏时通过降解细胞内的蛋白质和细胞器以促进细胞存活。自噬功能障碍与多种疾病密切相关。可溶性N-乙基马来酰亚胺敏感因子附着蛋白受体(soluble N-elthylmaleimide-sensitive factor attachment protein receptor,SNARE)复合物是一种介导膜融合的蛋白质,在自噬体和溶酶体的融合过程中发挥关键作用。SNARE复合物组装异常可引起自噬流阻滞,进而导致细胞功能紊乱和疾病的发生。本文对SNARE复合物在自噬过程的作用,以及在相关疾病中的最新研究进行总结,为以SNARE复合物为靶点研究自噬和疾病的机制提供参考。 展开更多
关键词 SNARE复合物 自噬 自噬体 溶酶体
暂未订购
囊泡运输调控植物盐胁迫响应的研究进展
3
作者 胡莹洁 杜晨琪 +4 位作者 王鎏帆 寿建昕 王超 徐梅 严旭 《浙江农业学报》 北大核心 2025年第9期2003-2011,共9页
盐胁迫是植物面临的最主要的非生物胁迫之一,为此植物进化出多种策略来应对高盐环境,其中囊泡运输是植物响应盐胁迫的重要机制,它可以通过调节离子稳态、信号转导和细胞结构重塑等方式精准调控植物的生理活动,从而减弱高浓度盐造成的损... 盐胁迫是植物面临的最主要的非生物胁迫之一,为此植物进化出多种策略来应对高盐环境,其中囊泡运输是植物响应盐胁迫的重要机制,它可以通过调节离子稳态、信号转导和细胞结构重塑等方式精准调控植物的生理活动,从而减弱高浓度盐造成的损害。近年来,已有多种囊泡运输关键因子,如网格蛋白、可溶性N-乙酰马来酰亚胺敏感因子附着蛋白受体(soluble N-ethylmaleimide-sensitive factor attachment protein receptor,SNARE蛋白)、小GTP酶等,被证明在平衡植物生长和盐胁迫响应中发挥重要作用。但囊泡运输网络各组分协同响应盐胁迫的分子机制及其在作物耐盐性中的应用潜力仍需深入挖掘。本文综述了囊泡运输调控植物耐盐性的最新研究进展,以期为利用囊泡运输机制培育高产耐盐作物提供新的策略。 展开更多
关键词 植物 盐胁迫 囊泡运输 网格蛋白 SNARE蛋白 小GTP酶
在线阅读 下载PDF
Removal of gastrointestinal foreign body
4
作者 Dusan Dj Popovic 《World Journal of Gastrointestinal Endoscopy》 2025年第8期125-127,共3页
The minireview titled“Modern endoscopist’s toolbox:Innovations in foreign body removal”by Shahid and published in the World Journal of Gastrointestinal Endoscopy provided a clear and comprehensive overview of endos... The minireview titled“Modern endoscopist’s toolbox:Innovations in foreign body removal”by Shahid and published in the World Journal of Gastrointestinal Endoscopy provided a clear and comprehensive overview of endoscopic management of gastrointestinal foreign bodies.It will serve as a valuable resource for endoscopists involved in the diagnosis and treatment of such cases.Several key and controversial aspects of patient management were highlighted in a meaningful way,including the importance of thorough medical history-taking,appropriate use of radiological imaging,and the selection of suitable endoscopic extraction techniques.An individualized,multidisciplinary approach is essential for diagnosis and treatment.While current guidelines offer significant support,they cannot replace the judgment of an experienced endoscopist working with a well-trained team. 展开更多
关键词 Foreign body removal ENDOSCOPY Upper endoscopy FORCEPS SNARE ANESTHESIA
暂未订购
Modern endoscopist’s toolbox:Innovations in foreign body removal
5
作者 Yumna Shahid 《World Journal of Gastrointestinal Endoscopy》 2025年第6期6-15,共10页
Foreign body ingestion is a common gastrointestinal emergency,particularly in children,who account for 80%of cases.While most ingested objects pass spontan-eously,around 20%require medical intervention.In adults,incid... Foreign body ingestion is a common gastrointestinal emergency,particularly in children,who account for 80%of cases.While most ingested objects pass spontan-eously,around 20%require medical intervention.In adults,incidents often occur accidentally during meals,leading to impactions,especially in individuals with underlying esophageal conditions.Endoscopy remains the gold standard for foreign body retrieval,with a success rate exceeding 95%.The type,shape,and location of the foreign body determine the clinical presentation and management approach.Sharp objects,batteries,and large items pose the highest risk of complications,including perforation,obstruction,and chemical injury.Prompt endoscopic removal is guided by established protocols,with emergent inter-vention required for complete esophageal obstruction and high-risk objects.Various retrieval devices,including forceps,snares,baskets,and overtubes,are used based on the nature of the foreign body.Technological advancements,such as artificial intelligence-assisted imaging and endoscopic ultrasound,are impro-ving diagnostic precision and procedural outcomes.Despite these advances,foreign body ingestion can still lead to severe complications if not managed in a timely manner.Public awareness,preventive measures,and rapid medical res-ponse are essential in reducing morbidity and mortality associated with foreign body ingestion. 展开更多
关键词 Foreign body removal ENDOSCOPY SNARE Forcep Food bolus Modern techniques
暂未订购
Efficacy-cost analysis of endoscopic mucosal resection and cold snare polypectomy:A propensity score matching analysis
6
作者 Shi-Yi Zhang Ying-Chun Wang +2 位作者 Lei-Lei Liu Zhi-Heng Wang Xue-Mei Guan 《World Journal of Gastrointestinal Surgery》 2025年第2期77-86,共10页
BACKGROUND Although substantial evidence supports the advantages of cold snare polypectomy(CSP)in terms of polypectomy efficacy and reduced postoperative adverse events,few studies have examined the cost differences b... BACKGROUND Although substantial evidence supports the advantages of cold snare polypectomy(CSP)in terms of polypectomy efficacy and reduced postoperative adverse events,few studies have examined the cost differences between CSP and traditional endoscopic mucosal resection(EMR)for the treatment of intestinal polyps.AIM To compare the efficacy-cost of EMR and CSP in the treatment of intestinal polyps.METHODS A total of 100 patients with intestinal polyps were included in the retrospective data of our hospital from April 2022 to May 2023.According to the treatment methods,they were divided into EMR(n=46)group and CSP(n=54)group.The baseline data of the two groups were balanced by 1:1 propensity score matching(PSM),and the cost-effectiveness analysis was performed on the two groups after matching.The recurrence rate of the two groups of patients was followed up for 1 year,and they were divided into recurrence group and non-recurrence group according to whether they recurred.Multivariate logistic regression analysis was used to screen out the influencing factors affecting the recurrence of intestinal polyps after endoscopic resection.RESULTS Significant disparities were observed in the number of polyps and smoking background between the two groups before PSM(P<0.05).Following PSM,the number of polyps and smoking history were well balanced between the EMR and CSP groups.The direct cost incurred by the CSP group was markedly higher than that incurred by the EMR group.Concurrently,the cost-effectiveness ratio in the CSP group was substantially reduced when juxtaposed with that in the EMR group(P<0.05).Upon completion of the 1-year follow-up,the rate of recurrence after endoscopic intestinal polypectomy was 38.00%.Multivariate methods revealed that age≥60 years,male sex,number of polyps≥3,and pathological type of adenoma were risk factors for recurrence after endoscopic intestinal polypectomy(all P<0.05).CONCLUSION CSP was more cost-effective for the treatment of intestinal polyps.An age≥60 years,male sex,having a number of polyps≥3,and pathological type of adenoma are independent influencing factors for recurrence. 展开更多
关键词 Propensity score matching method Endoscopic mucosal resection Cold snare polypectomy Intestinal polyps Curative effect Cost analysis
暂未订购
Endoscopic treatment modalities for colonic diverticular bleeding:A systematic review with direct and network meta-analyses
7
作者 Zahid Ijaz Tarar Mustafa Gandhi +6 位作者 Faisal Inayat Umer Farooq Baltej Singh Ahtshamullah Chaudhry Aun Muhammad Ahmad Zain Faisal Kamal 《World Journal of Gastrointestinal Endoscopy》 2025年第8期91-103,共13页
BACKGROUND Colonic diverticular bleeding(CDB)is a leading cause of lower gastrointestinal hemorrhage that has a high risk of recurrence.The endoscopic clipping and endoscopic band ligation(EBL)methods are widely used ... BACKGROUND Colonic diverticular bleeding(CDB)is a leading cause of lower gastrointestinal hemorrhage that has a high risk of recurrence.The endoscopic clipping and endoscopic band ligation(EBL)methods are widely used for hemostasis in patients with CDB.Endoscopic detachable snare ligation(EDSL)has also become an increasingly common treatment option.The data remain inconsistent regarding the comparative efficacy of these endoscopic therapies in achieving initial hemostasis and reduction of early and late rebleeding rates.AIM To study the effectiveness and complications of endoscopic clipping,EBL,and EDSL for CDB.METHODS We conducted a systematic search of PubMed/MEDLINE,Scopus,Web of Science,Embase,Google Scholar,and the Cochrane database for clinical trials to find studies that reported CDB and endoscopic clipping,EBL,or EDSL as treatment methods.The pooled estimates of initial hemostasis,early and late rebleeding,and the need for transarterial embolization or surgery between these groups were calculated.RESULTS We analyzed 28 studies with 5224 patients.Of these,4526 had active CDB and required one of the three endoscopic interventions.The pooled prevalence of early rebleeding was 23.5%,10.7%,and 10.6%in the endoscopic clipping,EBL,and EDSL groups,respectively.Patients who underwent endoscopic clipping had a significantly higher rate of early rebleeding compared to those who received EBL[odds ratio(OR)=3.76(95%CI:2.13-6.63)]and EDSL(OR=3.30,95%CI:1.28-8.53).There was no difference in the initial hemostasis between the three groups.The pooled prevalence of late rebleeding was 27.2%in the clipping,followed by 13.8%in the EBL and 2.7%in the EDSL group.Compared to 2.6%in the EBL group,4.0%of patients who received endoscopic clipping subsequently underwent surgery or transarterial embolization.These results were consistent in the network meta-analysis.Based on the ranking of the indirect comparison of modalities,the snare technique was better at achieving initial hemostasis and had a lower late rebleeding rate.CONCLUSION The findings of this direct and indirect pairwise comparison suggest that EDSL is superior to endoscopic clipping and EBL in achieving initial hemostasis and lowering the rate of late rebleeding in patients with CDB. 展开更多
关键词 Colonic diverticular bleeding Endoscopic clipping Endoscopic band ligation Endoscopic detachable snare ligation HEMOSTASIS REBLEEDING Meta-analysis
暂未订购
植物病原真菌及卵菌SNAREs基因功能研究进展
8
作者 杨明王 张红雪 +3 位作者 霍超 曹继芬 吴德喜 赵志坚 《江苏农业科学》 北大核心 2024年第1期1-10,共10页
植物病原真菌和卵菌产生的效应蛋白在促进病原菌侵染、操纵寄主免疫方面有关键作用,这些效应蛋白在与寄主作用之前必须被分泌出去,SNARE蛋白家族作为真核细胞内囊泡转运及膜融合的关键组分,在分子转运中有核心调控作用。随着许多植物丝... 植物病原真菌和卵菌产生的效应蛋白在促进病原菌侵染、操纵寄主免疫方面有关键作用,这些效应蛋白在与寄主作用之前必须被分泌出去,SNARE蛋白家族作为真核细胞内囊泡转运及膜融合的关键组分,在分子转运中有核心调控作用。随着许多植物丝状病原菌基因组被破译,对SNAREs基因参与病原菌致病机制的研究取得了可喜进展。本研究简要概述了真核生物中SNARE蛋白的组成及分类和植物病原真菌及卵菌中SNARE蛋白基因的功能研究进展,并据此提出进一步开展SNARE蛋白基因功能分析的研究建议,以期为全面、深入研究植物病原真菌和卵菌中SNARE基因的功能、理解病原菌致病、效应蛋白分泌提供新的视野,为植物-病原物互作的分子机制研究提供参考。 展开更多
关键词 植物病原菌 真菌 卵菌 效应分子 SNARE蛋白
在线阅读 下载PDF
Pyrimethamine upregulates BNIP3 to interfere SNARE-mediated autophagosome-lysosomal fusion in hepatocellular carcinoma 被引量:1
9
作者 Jingjing Wang Qi Su +9 位作者 Kun Chen Qing Wu Jiayan Ren Wenjuan Tang Yu Hu Zeren Zhu Cheng Cheng Kaihui Tu Huaizhen He Yanmin Zhang 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2024年第2期211-224,共14页
Hepatocellular carcinoma (HCC) is one of the most common tumor types and remains a major clinical challenge. Increasing evidence has revealed that mitophagy inhibitors can enhance the effect of chemotherapy on HCC. Ho... Hepatocellular carcinoma (HCC) is one of the most common tumor types and remains a major clinical challenge. Increasing evidence has revealed that mitophagy inhibitors can enhance the effect of chemotherapy on HCC. However, few mitophagy inhibitors have been approved for clinical use in humans. Pyrimethamine (Pyr) is used to treat infections caused by protozoan parasites. Recent studies have reported that Pyr may be beneficial in the treatment of various tumors. However, its mechanism of action is still not clearly defined. Here, we found that blocking mitophagy sensitized cells to Pyr-induced apoptosis. Mechanistically, Pyr potently induced the accumulation of autophagosomes by inhibiting autophagosome-lysosome fusion in human HCC cells. In vitro and in vivo studies revealed that Pyr blocked autophagosome-lysosome fusion by upregulating BNIP3 to inhibit synaptosomal-associated protein 29 (SNAP29)-vesicle-associated membrane protein 8 (VAMP8) interaction. Moreover, Pyr acted synergistically with sorafenib (Sora) to induce apoptosis and inhibit HCC proliferation in vitro and in vivo. Pyr enhances the sensitivity of HCC cells to Sora, a common chemotherapeutic, by inhibiting mitophagy. Thus, these results provide new insights into the mechanism of action of Pyr and imply that Pyr could potentially be further developed as a novel mitophagy inhibitor. Notably, Pyr and Sora combination therapy could be a promising treatment for malignant HCC. 展开更多
关键词 PYRIMETHAMINE BNIP3 SNARE Autophagosome-lysosome fusion Hepatocellular carcinoma Sorafenib
暂未订购
Cold snare polypectomy:A closer look at the efficacy and limitations for polyps 10-20 mm in size 被引量:2
10
作者 Louis A Chaptini Sarah Jalloul Karam Karam 《World Journal of Gastrointestinal Endoscopy》 2024年第8期445-450,共6页
Current guidelines recommend cold snare polypectomy for polyps less than 10 mm in size.Conversely,endoscopic mucosal resection is still the preferred technique for larger polyps.Concerns regarding cold snare polypecto... Current guidelines recommend cold snare polypectomy for polyps less than 10 mm in size.Conversely,endoscopic mucosal resection is still the preferred technique for larger polyps.Concerns regarding cold snare polypectomy for larger polyps revolve around the difficulty in conducting en-bloc resection(resulting in piecemeal removal),and the potential for local residual polyp tissue and a high rate of recurrence.On the other hand,cold snare technique has the advantages of shortening procedure time,reducing delayed bleeding risks and lowering cost of treatment.Numerous ongoing and recent studies are focused on evaluating the risks and benefits of this technique for polyps larger than 10 mm,with the goal of providing clear guidelines in the near future.The aim of this editorial is to provide our readers with an overview regarding this subject and the latest developments surrounding it. 展开更多
关键词 Colon polyp POLYPECTOMY Cold snare polypectomy Hot snare polypectomy Endoscopic mucosal resection Sessile serrated lesion ADENOMA
暂未订购
杨树腐烂病菌SNARE蛋白CcNyv1的功能
11
作者 邱啸林 王姝敏 +3 位作者 余璐 杨宇辰 熊典广 田呈明 《林业科学》 EI CAS CSCD 北大核心 2024年第9期90-98,共9页
【目的】解析SNARE蛋白Nyv1在杨树腐烂病菌中调控囊泡运输相关过程的功能,探究该病菌在生长发育和致病过程中的作用机制,为阐明SNARE蛋白在杨树腐烂病菌致病过程中的调控机制提供理论依据,并为该病害防控提供参考。【方法】1)利用酿酒酵... 【目的】解析SNARE蛋白Nyv1在杨树腐烂病菌中调控囊泡运输相关过程的功能,探究该病菌在生长发育和致病过程中的作用机制,为阐明SNARE蛋白在杨树腐烂病菌致病过程中的调控机制提供理论依据,并为该病害防控提供参考。【方法】1)利用酿酒酵母Nyv1的氨基酸序列进行Blastp分析,获得其同源的CcNyv1基因;2)利用生物信息学软件对CcNyv1编码的氨基酸序列和其他真菌中的Nyv1同源序列进行多序列比对,并构建系统发育树;3)采用Split-marker方法和PEG介导的遗传转化体系,构建CcNyv1基因缺失突变体及其回补菌株;4)通过PDA平板生长试验观察菌丝生长速率,分析CcNyv1基因及其Longin、SNARE结构域对菌丝的营养生长和盐胁迫响应的影响;5)通过对1年生杨树枝条烫伤接种观察病斑扩展面积,评价CcNyv1基因及其Longin、SNARE结构域对杨树腐烂病菌致病力的影响;6)利用FM4-64染剂染色,探究CcNyv1基因和Longin、SNARE结构域对该病菌的内吞作用产生的影响。【结果】1)通过酿酒酵母Nyv1的氨基酸序列blast比对,在杨树腐烂病菌中获得其同源基因CcNyv1,该基因全长780 bp,包含1个内含子,编码1个233 aa的囊泡运输相关R-SNARE蛋白,该蛋白含有1个N端的Longin结构域和1个C端的SNARE结构域;2)多序列对比和系统发育分析表明,CcNyv1和其他子囊菌中的Nyv1同源基因具有较高的序列相似度,且在进化上较为保守,与寄生隐丛赤壳中的同源基因的亲缘关系最为接近;3)成功构建CcNyv1基因缺失突变体、Longin结构域缺失突变体、SNARE结构域缺失突变体和CcNyv1基因回补菌株;4)菌丝生长表型和侵染杨树枝条致病表型分析表明,CcNyv1基因缺失突变体和Longin、SNARE结构域缺失突变体在菌丝营养生长、盐胁迫响应以及致病力等方面存在明显缺陷;5)比较FM4-64染色后野生型和缺失突变体菌株的囊泡分布情况,可见CcNyv1基因和Longin、SNARE结构域影响杨树腐烂病菌的内吞作用。【结论】杨树腐烂病菌SNARE蛋白CcNyv1在营养生长、胁迫应答、致病力及内吞作用等方面发挥重要调控作用。 展开更多
关键词 杨树 腐烂病 金黄壳囊孢 囊泡运输 SNARE CcNyv1 致病性
在线阅读 下载PDF
Pleomorphic leiomyosarcoma of the maxilla with metastasis to the colon:A case report
12
作者 Asma Alnajjar Abdulrahman Alfadda +3 位作者 Abdullah Mohammad Alqaraawi Bader Alajlan Jean Paul Atallah Hussah Fahad AlHussaini 《World Journal of Gastrointestinal Endoscopy》 2024年第6期361-367,共7页
BACKGROUND Pleomorphic leiomyosarcomas make up around 8.6%of all leiomyosarcomas.They behave aggressively and often have poor prognoses.They can affect the gastrointestinal tract and retroperitoneum.To date,pleomorphi... BACKGROUND Pleomorphic leiomyosarcomas make up around 8.6%of all leiomyosarcomas.They behave aggressively and often have poor prognoses.They can affect the gastrointestinal tract and retroperitoneum.To date,pleomorphic leiomyosarcoma involving the mesocolon have been reported in nine patients.CASE SUMMARY The patient was a 44-year-old man with a history of pleomorphic leiomyosarcoma of the left maxilla with metastasis to the lung and liver.His most recent positron emission tomography-computed tomography(PET-CT)scan showed uptake in the ascending and transverse colons.A colonoscopy revealed a 5.0 cm×3.5 cm×3.0 cm pedunculated polyp in the ascending colon.The polyp was removed using hot snare polypectomy technique and retrieved with Rothnet.Histopathologic examination of the polyp showed a metastatic pleomorphic leiomyosarcoma.CONCLUSION Uptake(s)on PET-CT in a patient with pleomorphic leiomyosarcoma should raise suspicion for metastasis. 展开更多
关键词 Pleomorphic leiomyosarcoma Colon polyp Hot snare polypectomy Maxillary Spindle cell tumor Case report
暂未订购
人SNARE复合物相关蛋白的表达与纯化
13
作者 支旭勃 陈款民 +5 位作者 王昭维 李倩楠 孙雪嫄 张芷萌 杨影 李元 《生物技术》 CAS 2024年第4期407-411,438,共6页
[目的]构建人SNARE复合物中的SNAP25、Syntaxin 1a和VAMP1蛋白真核表达载体,并于体外进行表达纯化。[方法]将重组质粒转化至大肠杆菌DH10Bac感受态细胞,经抗性和蓝白斑筛选,获得重组杆粒;用脂质体转化法,将重组杆粒转染至Sf9昆虫细胞中... [目的]构建人SNARE复合物中的SNAP25、Syntaxin 1a和VAMP1蛋白真核表达载体,并于体外进行表达纯化。[方法]将重组质粒转化至大肠杆菌DH10Bac感受态细胞,经抗性和蓝白斑筛选,获得重组杆粒;用脂质体转化法,将重组杆粒转染至Sf9昆虫细胞中使其产生重组病毒,最后对病毒进行扩增后再感染Sf9昆虫细胞表达目的蛋白;所得蛋白进行Western Blot鉴定及纯化。[结果]测序结果表明SNAP25、Syntaxin 1a和VAMP1真核表达载体构建成功,Western Blot检测出三种蛋白的特异性条带,利用His标签蛋白纯化出Syntaxin 1a蛋白。[结论]利用杆状病毒表达系统成功表达出了SNARE复合物相关蛋白。 展开更多
关键词 SNARE复合物 SNAP25蛋白 Syntaxin 1a蛋白 VAMP1蛋白 重组杆粒 杆状病毒 Sf9昆虫细胞 蛋白纯化
原文传递
Endoscopic Treatment of 14 Cases of Small Subepithelial Lesions in the Gastrointestinal Tract Using a Combined Snare, Long Lucency Cap, and Argon Plasma Coagulation Technique
14
作者 Jian Pang Jingyu Wu +5 位作者 Chen Sun Yan Jiang Xiangyuan Liu Chang’en Liu Xinwen Lei Tengqi Wang 《Journal of Clinical and Nursing Research》 2024年第10期175-181,共7页
Subepithelial lesions(SEL)of the digestive tract refer to a series of benign and malignant subepithelial masses that appear smooth or rough under gastrointestinal endoscopy.Endoscopic resection of subepithelial lesion... Subepithelial lesions(SEL)of the digestive tract refer to a series of benign and malignant subepithelial masses that appear smooth or rough under gastrointestinal endoscopy.Endoscopic resection of subepithelial lesions in the digestive tract is widely recognized due to its advantages of minimal trauma and rapid recovery.This paper reports and summarizes the experiences of using the combined snare,long lucency cap,and argon plasma coagulation technique to remove small subepithelial lesions in 14 patients. 展开更多
关键词 Subepithelial lesions of the digestive tract SNARE Long lucency cap Argon plasma coagulation
暂未订购
针刺对抑郁症大鼠海马SNARE蛋白介导突触前谷氨酸释放的影响 被引量:5
15
作者 樊凌 赵蒨琦 +6 位作者 吕爱平 许能贵 刘建华 李滋平 吴泰相 欧爱华 符文彬 《中国老年学杂志》 CAS CSCD 北大核心 2016年第13期3123-3126,共4页
目的探讨针刺对抑郁症的治疗作用及其可能的治疗靶点。方法采用长期不可预见的温和性刺激建立大鼠抑郁症模型。成功造模后,给予利鲁唑和针刺治疗,观察各组大鼠行为学的变化,测定海马组织谷氨酸的含量变化;应用Western印迹和荧光定量PCR... 目的探讨针刺对抑郁症的治疗作用及其可能的治疗靶点。方法采用长期不可预见的温和性刺激建立大鼠抑郁症模型。成功造模后,给予利鲁唑和针刺治疗,观察各组大鼠行为学的变化,测定海马组织谷氨酸的含量变化;应用Western印迹和荧光定量PCR检测突触小体相关蛋白(SNAP)-25、突触小泡膜相关蛋白(VAMP)1、VAMP2、VAMP7和syntaxin1蛋白及相应mRNA表达。结果与空白组相比,应激后大鼠的活动能力、体重和蔗糖消耗量明显下降(P<0.05);海马组织谷氨酸含量显著升高(P<0.01);而经利鲁唑和针刺治疗后,活动能力、体重和蔗糖消耗量升高;海马组织谷氨酸含量下降。Western印迹和RT-PCR结果显示:模型组大鼠的SNAP-25、VAMP1、VAMP2、VAMP7和syntaxin1表达量显著高于空白组(P<0.05);与模型组相比,利鲁唑和针刺组均能降低SNAP-25、VAMP1、VAMP2、VAMP7和syntaxin1表达水平,且利鲁唑组与针刺组对各检测指标的影响均无显著性差异(P>0.05)。结论针刺对谷氨酸释放有明显的调节作用,可溶性NSF附着蛋白受体(SNARE)介导的突触前谷氨酸释放在抑郁症的发病以及针刺抗抑郁过程中有重要作用,可能是针刺抗抑郁的靶点之一。 展开更多
关键词 针刺 抑郁症 海马 SNARE蛋白 谷氨酸
暂未订购
稻瘟菌附着胞形成和发育的研究进展 被引量:6
16
作者 彭陈 陈洪亮 +1 位作者 张玉琼 郭士伟 《微生物学通报》 CAS CSCD 北大核心 2011年第8期1270-1277,共8页
附着胞是稻瘟菌侵染寄主的关键结构,cAMP、MAPK和Ca2+等信号途径参与其形成和发育,同时受寄主表面识别蛋白基因、黑色素合成基因、甘油合成基因、细胞自噬基因以及SNARE蛋白等因子调控。从以上几个方面综述了稻瘟菌附着胞形成与发育的... 附着胞是稻瘟菌侵染寄主的关键结构,cAMP、MAPK和Ca2+等信号途径参与其形成和发育,同时受寄主表面识别蛋白基因、黑色素合成基因、甘油合成基因、细胞自噬基因以及SNARE蛋白等因子调控。从以上几个方面综述了稻瘟菌附着胞形成与发育的研究进展。 展开更多
关键词 附着胞 自噬基因 P型ATP酶 SNARE蛋白
原文传递
SNAREs蛋白复合物与囊泡融合分子调节机制的研究进展 被引量:5
17
作者 陈立强 王洋洋 +2 位作者 司艳辉 梁洁玲 李海珠 《检验医学与临床》 CAS 2015年第10期1462-1463,共2页
细胞内大分子物质及颗粒性物质不能自由穿过细胞膜,必须以囊泡运输的方式进行跨膜转运,囊泡介导的转运方式,无论是正向或是逆向转运,都包括3个主要步骤,分别是外壳蛋白的选择,囊泡的出芽与形成和转运物质的选择[1]。研究表明在囊泡运输... 细胞内大分子物质及颗粒性物质不能自由穿过细胞膜,必须以囊泡运输的方式进行跨膜转运,囊泡介导的转运方式,无论是正向或是逆向转运,都包括3个主要步骤,分别是外壳蛋白的选择,囊泡的出芽与形成和转运物质的选择[1]。研究表明在囊泡运输过程中N-乙基马来酰亚胺敏感因子附着蛋白受体(SNAREs)发挥着重要作用, 展开更多
关键词 SNARES 囊泡融合 Synaptobrevins Syntaxins 突触相关蛋白
暂未订购
丙烯酰胺致NB-1细胞突触损伤与SNARE效应相关性研究 被引量:6
18
作者 王秀会 孙彦彦 +5 位作者 张斌 曹鹏 陈宵 王学生 肖经纬 李斌 《毒理学杂志》 CAS CSCD 北大核心 2015年第2期79-85,共7页
目的构建人神经母细胞瘤NB-1细胞神经元突触损伤的细胞模型,探讨丙烯酰胺(acrylamide,ACR)对神经突触损伤的机制。方法将NB-1细胞通过二丁酰环腺苷酸(db-c AMP)诱导为成熟神经元后,MTT检测ACR不同剂量(0、25、50、100、150、200和250μg... 目的构建人神经母细胞瘤NB-1细胞神经元突触损伤的细胞模型,探讨丙烯酰胺(acrylamide,ACR)对神经突触损伤的机制。方法将NB-1细胞通过二丁酰环腺苷酸(db-c AMP)诱导为成熟神经元后,MTT检测ACR不同剂量(0、25、50、100、150、200和250μg/ml)和不同染毒时间(24、48和72 h)对NB-1细胞相对存活率的影响;免疫印记(western blot)技术检测神经元突触损伤前后突触素I(Synapsin I)磷酸化和非磷酸化蛋白表达变化,光学显微镜和电子显微镜记录神经元突触损伤前后形态、结构变化,免疫共沉淀试验确定神经元突触损伤前后N-甲基马来酰胺敏感因子(NSF)附着蛋白受体(SNARE)的结合/解离的变化。结果根据MTT试验结果确定ACR染毒剂量为0、25、50和100μg/ml,染毒时间为48 h;随着ACR染毒剂量的增加Synapsin I磷酸化和非磷酸化蛋白表达降低;在25μg/ml ACR染毒剂量下可见兴奋性和抑制性神经递质,而在50μg/ml染毒剂量下可见抑制性递质;随ACR染毒剂量的增加SNARE复合体中突触融合蛋白(syntaxin)和突触小体相关蛋白(SNAP-25)呈解离状态。结论 ACR对NB-1细胞突触损伤后,SNARE复合体中syntaxin和SNAP-25结合状态与Synapsin I、P-Synapsin I蛋白表达降低呈正相关,与P-Synapsin I/Synapsin I差异性表达呈负相关;突触内特异性神经递质的传递和释放可能与P-Synapsin I/Synapsin I差异性表达所调控的SNARE复合体的解离状态导致的突触功能损伤相关。 展开更多
关键词 丙烯酰胺 NB-1细胞 突触素Ⅰ SNARE复合体 神经递质
原文传递
肺腺癌患者突触小体相关蛋白家族的表达研究 被引量:4
19
作者 黄兴 陆世民 +4 位作者 王欣 陈辰 王洁 许林 任斌辉 《医学研究生学报》 CAS 北大核心 2015年第6期600-603,共4页
目的大量研究表明,突触小体相关蛋白(synaptosomal-associated protein,SNAP)与多种肿瘤的发生发展密切相关。文中旨在筛选并验证在肺腺癌中特异性表达的突触小体相关蛋白47(synaptosomal-associated protein 47,SNAP47)并分析其与临床... 目的大量研究表明,突触小体相关蛋白(synaptosomal-associated protein,SNAP)与多种肿瘤的发生发展密切相关。文中旨在筛选并验证在肺腺癌中特异性表达的突触小体相关蛋白47(synaptosomal-associated protein 47,SNAP47)并分析其与临床指标间的关系。方法应用表达谱基因芯片和肿瘤基因组图谱(the cancer genome atlas,TCGA)公共数据库筛选出特异性高表达于肺癌中的SNAP47,并选取江苏省肿瘤医院有完整临床资料的52例肺腺癌患者,对其癌组织及对应的癌旁肺组织应用实时定量逆转录聚合酶链反应检测SNAP47 mRNA的表达情况,并分析其与临床指标间的关系。结果 52例肺腺癌组织中,41例(78.9%)SNAP47 mRNA表达水平明显高于对应的癌旁肺组织,差异有统计学意义(P<0.05),且Ⅱ、Ⅲ期患者SNAP47 mRNA的表达水平(6.558±4.730)显著高于I期患者(2.718±2.370),N1+N2组患者SNAP47 mRNA的表达水平(6.609±4.942)也明显高于N0组患者(3.360±2.987),差异均有统计学意义(P<0.05)。结论 SNAP47 mRNA特异性高表达可能参与了肺腺癌的浸润及淋巴结转移,是潜在的肺癌诊疗靶点。 展开更多
关键词 SNAP47 SNARE蛋白 肺腺癌 侵袭转移 实时PCR
暂未订购
驱蛔中药的活性成分川楝素的生物效应 被引量:22
20
作者 施玉樑 王文萍 《生理学报》 CAS CSCD 北大核心 2006年第5期397-406,共10页
利用楝属植物皮和种子治疗消化道寄生虫病和防治农业虫害,早在两千年前的中国古代已有记载。川楝素(toosendanin,C30H38O11,FW=574)是我国科学家在上世纪五十年代从川楝皮提取、分离的一个用以代替进口驱蛔药山道年的三萜化合物。研究... 利用楝属植物皮和种子治疗消化道寄生虫病和防治农业虫害,早在两千年前的中国古代已有记载。川楝素(toosendanin,C30H38O11,FW=574)是我国科学家在上世纪五十年代从川楝皮提取、分离的一个用以代替进口驱蛔药山道年的三萜化合物。研究已证明川楝素具多种独特的生物效应和在科学研究、临床医学及农业上的应用价值。第一,川楝素以先易化后抑制的双相作用干扰神经递质释放,阻遏神经肌肉接头和中枢神经突触的突触传递。此作用可能是川楝素改变递质释放装置的Ca2+敏感性和使之最终完全消失的结果。第二,尽管川楝素与肉毒神经毒素阻遏神经肌肉接头传递的作用有许多相似,川楝素在离体和在体实验中均显示出极有效的抗肉毒神经毒素作用:川楝素可治愈致死量肉毒中毒的小鼠和猴;经川楝素孵育的离体神经肌肉标本,或由经一次川楝素注射的动物取出的神经肌肉标本具抵抗肉毒神经毒素作用的能力。已有证据表明抗肉毒神经毒素作用是通过川楝素阻隔肉毒神经毒素与其酶解底物SNARE蛋白的接近而实现的。第三,近年观察到川楝素还引发细胞分化和凋亡,抑制人的多种肿瘤细胞增殖。该作用是Ca2+依赖性的,有线粒体依赖的凋亡通路参与。第四,川楝素抑制多种K+通道,选择性地易化通过L型Ca2+通道的Ca2+流,并由此导致细胞内Ca2+浓度([Ca2+]i)持续升高。川楝素对K+通道的抑制,对L型Ca2+通道的易化和由之引起的[Ca2+]i升高和超载,是川楝素引发细胞分化和凋亡、抑制细胞增殖,以及川楝素产生神经递质双相变化和阻遏突触传递的机制。 展开更多
关键词 川楝素 突触前阻断剂 肉毒中毒 SNARE蛋白 细胞凋亡 CA^2+ K^+通道
暂未订购
上一页 1 2 7 下一页 到第
使用帮助 返回顶部