PNAS:细菌感染之光动力抗菌新进展

2019-11-10 酶美 BioArt

细菌感染一直威胁着人类健康。随着近年来细菌耐药性严重化,细菌感染将可能带来比癌症更严重的全球性危害。光动力抗菌是一种结合光敏剂、氧气、光产生活性氧,从而破坏菌膜中活性物质的抗菌方法,它不易使细菌产生耐药性,且时空可控性高、入侵性小,因而在抗菌领域受到了广泛关注。然而,在光动力抗菌过程中,活性氧成分寿命短、作用半径小,且菌膜可有效阻挡外来物质,因而如何提高光敏剂的膜插入能力成为光动力抗菌的难点和关键

细菌感染一直威胁着人类健康。随着近年来细菌耐药性严重化,细菌感染将可能带来比癌症更严重的全球性危害。光动力抗菌是一种结合光敏剂、氧气、光产生活性氧,从而破坏菌膜中活性物质的抗菌方法,它不易使细菌产生耐药性,且时空可控性高、入侵性小,因而在抗菌领域受到了广泛关注。然而,在光动力抗菌过程中,活性氧成分寿命短、作用半径小,且菌膜可有效阻挡外来物质,因而如何提高光敏剂的膜插入能力成为光动力抗菌的难点和关键。

近期,中科院理化技术研究所田野团队联合上海交通大学颜徐州课题组、美国犹他大学Peter J. Stang课题组,将修饰细胞穿膜肽TAT的烟草花叶病毒衣壳蛋白(TAT-TMVCP),与具有聚集诱导发光性质的有机铂金属大环(TPE-Pt-MC),通过静电相互作用自组装。在形成的组装体中,被包裹在内部的光敏剂TPE-Pt-MC提供活性氧产生能力,暴露在外表面的TAT提供穿膜能力,实现了穿膜增强的光动力抗菌。在光照条件下,该组装结构可明显抑制大肠杆菌及金黄色葡萄球菌的生长。尤其对于具有外膜结构的革兰氏阴性菌——大肠杆菌,该组装结构可使其存活率由黑暗条件下的~55%降低至光照条件下的~0%。该研究对于提高光动力抗菌效率,以及制备多功能纳米粒子具有重要意义。相关研究成果以Membrane Intercalation-Enhanced Photodynamic Inactivation of Bacteria by a Metallacycle and TAT-Decorated Virus Coat Protein为题,发表于PNAS。

中科院理化技术研究所牛忠伟课题组博士生高偲嘉为该论文的第一作者,上海交通大学颜徐州研究员、美国犹他大学Peter J. Stang教授、中科院理化技术研究所田野副研究员是该论文的通讯作者。

原始出处:
Gao S1,2, Yan X3, Xie G1,2, et al.Membrane intercalation-enhanced photodynamic inactivation of bacteria by a metallacycle and TAT-decorated virus coat protein.Proc Natl Acad Sci U S A. 2019 Nov 4. pii: 201911869. doi: 10.1073/pnas.1911869116. [Epub ahead of print]

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (4)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1856359, encodeId=3d8018563597f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Wed May 27 10:48:00 CST 2020, time=2020-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280682, encodeId=0cff12806829a, content=<a href='/topic/show?id=beefe810798' target=_blank style='color:#2F92EE;'>#细菌感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78107, encryptionId=beefe810798, topicName=细菌感染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6779163, createdName=liuhuangbo, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1330861, encodeId=14f313308611d, content=<a href='/topic/show?id=c6b455688d1' target=_blank style='color:#2F92EE;'>#抗菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55688, encryptionId=c6b455688d1, topicName=抗菌)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdqq.qlogo.cn/qqapp/1103841572/2898B09F0DA89357D0D54A725E611AC7/100, createdBy=fdd32500040, createdName=ms7899726347904398, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1546325, encodeId=a02b154632507, content=<a href='/topic/show?id=0da528e33ce' target=_blank style='color:#2F92EE;'>#光动力#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28733, encryptionId=0da528e33ce, topicName=光动力)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2b6213920685, createdName=luckyshitiancai_42705688, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=)]
    2020-05-27 drwjr
  2. [GetPortalCommentsPageByObjectIdResponse(id=1856359, encodeId=3d8018563597f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Wed May 27 10:48:00 CST 2020, time=2020-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280682, encodeId=0cff12806829a, content=<a href='/topic/show?id=beefe810798' target=_blank style='color:#2F92EE;'>#细菌感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78107, encryptionId=beefe810798, topicName=细菌感染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6779163, createdName=liuhuangbo, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1330861, encodeId=14f313308611d, content=<a href='/topic/show?id=c6b455688d1' target=_blank style='color:#2F92EE;'>#抗菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55688, encryptionId=c6b455688d1, topicName=抗菌)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdqq.qlogo.cn/qqapp/1103841572/2898B09F0DA89357D0D54A725E611AC7/100, createdBy=fdd32500040, createdName=ms7899726347904398, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1546325, encodeId=a02b154632507, content=<a href='/topic/show?id=0da528e33ce' target=_blank style='color:#2F92EE;'>#光动力#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28733, encryptionId=0da528e33ce, topicName=光动力)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2b6213920685, createdName=luckyshitiancai_42705688, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1856359, encodeId=3d8018563597f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Wed May 27 10:48:00 CST 2020, time=2020-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280682, encodeId=0cff12806829a, content=<a href='/topic/show?id=beefe810798' target=_blank style='color:#2F92EE;'>#细菌感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78107, encryptionId=beefe810798, topicName=细菌感染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6779163, createdName=liuhuangbo, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1330861, encodeId=14f313308611d, content=<a href='/topic/show?id=c6b455688d1' target=_blank style='color:#2F92EE;'>#抗菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55688, encryptionId=c6b455688d1, topicName=抗菌)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdqq.qlogo.cn/qqapp/1103841572/2898B09F0DA89357D0D54A725E611AC7/100, createdBy=fdd32500040, createdName=ms7899726347904398, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1546325, encodeId=a02b154632507, content=<a href='/topic/show?id=0da528e33ce' target=_blank style='color:#2F92EE;'>#光动力#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28733, encryptionId=0da528e33ce, topicName=光动力)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2b6213920685, createdName=luckyshitiancai_42705688, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1856359, encodeId=3d8018563597f, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Wed May 27 10:48:00 CST 2020, time=2020-05-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280682, encodeId=0cff12806829a, content=<a href='/topic/show?id=beefe810798' target=_blank style='color:#2F92EE;'>#细菌感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=78107, encryptionId=beefe810798, topicName=细菌感染)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6779163, createdName=liuhuangbo, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1330861, encodeId=14f313308611d, content=<a href='/topic/show?id=c6b455688d1' target=_blank style='color:#2F92EE;'>#抗菌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55688, encryptionId=c6b455688d1, topicName=抗菌)], attachment=null, authenticateStatus=null, createdAvatar=https://thirdqq.qlogo.cn/qqapp/1103841572/2898B09F0DA89357D0D54A725E611AC7/100, createdBy=fdd32500040, createdName=ms7899726347904398, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1546325, encodeId=a02b154632507, content=<a href='/topic/show?id=0da528e33ce' target=_blank style='color:#2F92EE;'>#光动力#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=42, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28733, encryptionId=0da528e33ce, topicName=光动力)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2b6213920685, createdName=luckyshitiancai_42705688, createdTime=Tue Nov 12 04:48:00 CST 2019, time=2019-11-12, status=1, ipAttribution=)]

相关资讯

孩子发烧是细菌感染还是病毒感染?教你秒懂血常规!

血常规中的白细胞总数和分类是临床医生诊断和治疗疾病重要的参考资料,尤其在儿科急性发热、感染性疾病诊治中,血常规检查常是区别细菌性感染或病毒感染以及感染严重度必不可少的手段。所以孩子生病后去医院看病,常常有医生建议去做血常规化验。在儿科发热的患儿,白细胞和分类值常反映感染性炎症,也常作为鉴别细菌性或非细菌性感染的指标。

J Endod:创伤性损伤的微生物学研究

牙齿受到外伤后,微生物会侵袭受损的牙髓组织并引发牙髓感染以及尖周炎症反应。除了伴随牙髓坏死的典型性尖周骨吸收,牙根吸收也经常发生。牙根吸收有多种变化,可以在外伤后短期或更久之后发生。外伤后牙齿的病理变化常常与存在微生物刺激相关。髓腔中存在菌斑生物膜时可通过牙髓再生或者牙髓治疗得以恢复。然而,对于涉及牙齿的牙周膜坏死通常是永久性的。

新加坡发现两例细菌感染病例 菌株与澳患者相似

据新加坡《海峡时报》4 月 16 日报道,新加坡卫生部于当日宣布发现两例李斯特菌株感染病例,患者所感染的菌株与澳大利亚李斯特菌感患者感染的菌株相似。

J Endod:激光共聚焦显微镜检测横向序列分割法评估牙本质去感染的效果

这篇研究的目的是为了研发一种技术以创建可荧光显影感染牙本质所有部分细菌活力的连续切片。

Lancet:快速尿检结核是否能使HIV患者获益?

HIV患者中结核菌感染是主要的致死因素,然而HIV患者中结核易在体内播散,症状缺乏特异性,诊断流程亟待优化。

PNAS:癌症又一重大突破:支原体感染通过影响表观遗传促进癌症发生发展!

抗生素的应用和发现使人类的平均寿命延长了15年。但细菌进化的速度却超出了人类的预想,这种“意外之外”不仅导致了超级细菌的出现,而且近年来,越来越多的研究将癌症与细菌感染联系在了一起。国际癌症研究中心曾指出,世界上约1/6癌症的罪魁祸首是细菌和病毒。在炎症见怪不怪的时代,这种统计学数据听起来简直让人“毛骨悚然”!那么,细菌感染与癌症之间的关系为什么如此“缠绵悱恻”呢?