Baidu
map

PNAS:研究表明肌萎缩性侧索硬化症是一种蛋白疾病

2014-10-29 佚名 生物谷

近日研究发现,研究人员运用一项技术来说明个体蛋白微弱的改变,康奈尔大学化学研究人员已经发现了新的引起肌萎缩性脊髓侧索硬化症(ALS)的原因。 ALS是一种复杂的神经退行性疾病,它通常具有遗传特性,基因缺陷导致它可以被遗传。科学家早已知道破坏性的蛋白质编码基因是“超氧化物歧化酶1”或SOD1,这是一个关键的含铜酶,该酶通过破坏自由基来保护细胞免受氧化损伤。 科学家们推测,ALS疾病是由于神经

近日研究发现,研究人员运用一项技术来说明个体蛋白微弱的改变,康奈尔大学化学研究人员已经发现了新的引起肌萎缩性脊髓侧索硬化症(ALS)的原因。

ALS是一种复杂的神经退行性疾病,它通常具有遗传特性,基因缺陷导致它可以被遗传。科学家早已知道破坏性的蛋白质编码基因是“超氧化物歧化酶1”或SOD1,这是一个关键的含铜酶,该酶通过破坏自由基来保护细胞免受氧化损伤。

科学家们推测,ALS疾病是由于神经元氧化损伤所导致的,Crane说。但他和他的同事们提供了另一种假说:强有力的证据表明由于SOD1蛋白质结构不稳定引起的突变导致ALS疾病。这会引起蛋白质的运动增强,Crane将它比作“呼吸。”这种运动可以促进他们的聚合,或凝集在一起——该过程对健康细胞是有毒的。

“ALS这种形式是一种蛋白质聚集体疾病,就像阿尔茨海默病和帕金森疾病一样。”Crane说。

在很长一段时间内人们试图通过研究SOD1突变来了解ALS,但正常蛋白质的性质和突变蛋白质的性质是非常相似的。科学家们利用ESR光谱第一次看到了两种蛋白之间的明确的差异。Crane说,通过用其他方法进行验证,动态的蛋白质通过突变发生了巨大的变化,它们显示出聚合的倾向。

在PNAS杂志上相关文章表明x射线散射也用于研究蛋白质的结构变化和能力之间的相互作用。研究人员发现,蛋白质聚合的水平与ALS症状的严重程度相关。

研究结论指出,ALS发生的可能性与蛋白聚合的毒性有较大的关联而和SOD1活性突变的作用关联较小,Crane说。ALS是一种迟发性的疾病,人们在晚年的生活会受到影响。“SOD1的散发性突变来自自然过程,但是尚不清楚它们是否会引起疾病的发生。”他说。

原始出处

Pratt AJ1, Shin DS1, Merz GE2, Rambo RP3, Lancaster WA4, Dyer KN3, Borbat PP5, Poole FL 2nd4, Adams MW4, Freed JH5, Crane BR2, Tainer JA6, Getzoff ED7.Aggregation propensities of superoxide dismutase G93 hotspot mutants mirror ALS clinical phenotypes.Proc Natl Acad Sci U S A. 2014 Oct 14.

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 (5)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1855651, encodeId=69281855651e8, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Thu Aug 20 12:10:00 CST 2015, time=2015-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942274, encodeId=089719422e4aa, content=<a href='/topic/show?id=6b418809e8c' target=_blank style='color:#2F92EE;'>#萎缩性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88097, encryptionId=6b418809e8c, topicName=萎缩性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a8e213, createdName=hongbochen, createdTime=Sun Nov 09 09:10:00 CST 2014, time=2014-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1982891, encodeId=785919828919a, content=<a href='/topic/show?id=a7a7e359478' target=_blank style='color:#2F92EE;'>#硬化症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73594, encryptionId=a7a7e359478, topicName=硬化症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Thu Jan 22 14:10:00 CST 2015, time=2015-01-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695749, encodeId=01f01695e497c, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Apr 10 18:10:00 CST 2015, time=2015-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503052, encodeId=4288150305293, content=<a href='/topic/show?id=a71481058ca' target=_blank style='color:#2F92EE;'>#肌萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81058, encryptionId=a71481058ca, topicName=肌萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=eebd9606217, createdName=neizongke, createdTime=Fri Oct 31 00:10:00 CST 2014, time=2014-10-31, status=1, ipAttribution=)]
    2015-08-20 drwjr
  2. [GetPortalCommentsPageByObjectIdResponse(id=1855651, encodeId=69281855651e8, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Thu Aug 20 12:10:00 CST 2015, time=2015-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942274, encodeId=089719422e4aa, content=<a href='/topic/show?id=6b418809e8c' target=_blank style='color:#2F92EE;'>#萎缩性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88097, encryptionId=6b418809e8c, topicName=萎缩性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a8e213, createdName=hongbochen, createdTime=Sun Nov 09 09:10:00 CST 2014, time=2014-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1982891, encodeId=785919828919a, content=<a href='/topic/show?id=a7a7e359478' target=_blank style='color:#2F92EE;'>#硬化症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73594, encryptionId=a7a7e359478, topicName=硬化症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Thu Jan 22 14:10:00 CST 2015, time=2015-01-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695749, encodeId=01f01695e497c, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Apr 10 18:10:00 CST 2015, time=2015-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503052, encodeId=4288150305293, content=<a href='/topic/show?id=a71481058ca' target=_blank style='color:#2F92EE;'>#肌萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81058, encryptionId=a71481058ca, topicName=肌萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=eebd9606217, createdName=neizongke, createdTime=Fri Oct 31 00:10:00 CST 2014, time=2014-10-31, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1855651, encodeId=69281855651e8, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Thu Aug 20 12:10:00 CST 2015, time=2015-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942274, encodeId=089719422e4aa, content=<a href='/topic/show?id=6b418809e8c' target=_blank style='color:#2F92EE;'>#萎缩性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88097, encryptionId=6b418809e8c, topicName=萎缩性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a8e213, createdName=hongbochen, createdTime=Sun Nov 09 09:10:00 CST 2014, time=2014-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1982891, encodeId=785919828919a, content=<a href='/topic/show?id=a7a7e359478' target=_blank style='color:#2F92EE;'>#硬化症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73594, encryptionId=a7a7e359478, topicName=硬化症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Thu Jan 22 14:10:00 CST 2015, time=2015-01-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695749, encodeId=01f01695e497c, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Apr 10 18:10:00 CST 2015, time=2015-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503052, encodeId=4288150305293, content=<a href='/topic/show?id=a71481058ca' target=_blank style='color:#2F92EE;'>#肌萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81058, encryptionId=a71481058ca, topicName=肌萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=eebd9606217, createdName=neizongke, createdTime=Fri Oct 31 00:10:00 CST 2014, time=2014-10-31, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1855651, encodeId=69281855651e8, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Thu Aug 20 12:10:00 CST 2015, time=2015-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942274, encodeId=089719422e4aa, content=<a href='/topic/show?id=6b418809e8c' target=_blank style='color:#2F92EE;'>#萎缩性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88097, encryptionId=6b418809e8c, topicName=萎缩性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a8e213, createdName=hongbochen, createdTime=Sun Nov 09 09:10:00 CST 2014, time=2014-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1982891, encodeId=785919828919a, content=<a href='/topic/show?id=a7a7e359478' target=_blank style='color:#2F92EE;'>#硬化症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73594, encryptionId=a7a7e359478, topicName=硬化症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Thu Jan 22 14:10:00 CST 2015, time=2015-01-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695749, encodeId=01f01695e497c, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Apr 10 18:10:00 CST 2015, time=2015-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503052, encodeId=4288150305293, content=<a href='/topic/show?id=a71481058ca' target=_blank style='color:#2F92EE;'>#肌萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81058, encryptionId=a71481058ca, topicName=肌萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=eebd9606217, createdName=neizongke, createdTime=Fri Oct 31 00:10:00 CST 2014, time=2014-10-31, status=1, ipAttribution=)]
    2015-04-10 chendoc252
  5. [GetPortalCommentsPageByObjectIdResponse(id=1855651, encodeId=69281855651e8, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Thu Aug 20 12:10:00 CST 2015, time=2015-08-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942274, encodeId=089719422e4aa, content=<a href='/topic/show?id=6b418809e8c' target=_blank style='color:#2F92EE;'>#萎缩性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88097, encryptionId=6b418809e8c, topicName=萎缩性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0a8e213, createdName=hongbochen, createdTime=Sun Nov 09 09:10:00 CST 2014, time=2014-11-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1982891, encodeId=785919828919a, content=<a href='/topic/show?id=a7a7e359478' target=_blank style='color:#2F92EE;'>#硬化症#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=73594, encryptionId=a7a7e359478, topicName=硬化症)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a691420, createdName=30397604, createdTime=Thu Jan 22 14:10:00 CST 2015, time=2015-01-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1695749, encodeId=01f01695e497c, content=<a href='/topic/show?id=03b98809697' target=_blank style='color:#2F92EE;'>#萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88096, encryptionId=03b98809697, topicName=萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=53fc29868494, createdName=chendoc252, createdTime=Fri Apr 10 18:10:00 CST 2015, time=2015-04-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1503052, encodeId=4288150305293, content=<a href='/topic/show?id=a71481058ca' target=_blank style='color:#2F92EE;'>#肌萎缩#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=81058, encryptionId=a71481058ca, topicName=肌萎缩)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=eebd9606217, createdName=neizongke, createdTime=Fri Oct 31 00:10:00 CST 2014, time=2014-10-31, status=1, ipAttribution=)]

相关资讯

CMAJ:地中海饮食或可帮助逆转代谢综合征

近日,一篇发表在国际杂志Canadian Medical Association Journal(CMAJ)上的研究报告中,来自西班牙的科学家通过研究发现,地中海饮食外加初级橄榄油或坚果的饮食方式或许可以帮助代谢综合征患者逆转其病情发展。 世界上大约25%的成年人都患有不同程度的代谢综合征,代谢综合征的出现往往表现为三个甚至更多的因素,比如较粗的腰围、高血压、低高密度脂蛋白胆固醇、高血脂以

过7年,降血脂药物市场是谁的天下

2021年美国、日本、法国、德国、意大利、西班牙、英国七个国家降血脂药销售额将高达295.4亿美元。 目前全球心血管病发病率呈现逐年增高趋势,每年死于心血管疾病的人不断增加。世界卫生组织2013年最新统计数据显示,预计到2030年全球将有两千三百万人死于心血管疾病。血脂异常与动脉粥样硬化的发生、发展密切相关,是心脑血管疾病的重要危险因素,严重威胁着人类健康。 血脂异常临床分为4类:1)高胆固醇

STM:2型糖尿病基因特异性治疗新思路

基因组学为人类认识自身与疾病展现了前所未有的前景,但利用基因组信息个体化治疗多基因疾病的可行性目前仍不明确。最近有研究发现,编码α2A肾上腺素能受体的ADRA2A基因的一个遗传性变型与2型糖尿病关系密切。这个高危变型可引起受体过表达和胰岛素分泌受损。因此,来自瑞典隆德大学的研究人员提出这样的假设,药理学上的某种有效物质如果能阻断α2A肾上腺素能受体就可以改善高危基因型患者的胰岛素分泌,从而为2型糖

史上很大药害事件: “反应停”事件中的女英雄、制药公司和监管革命

  1961年,一种曾用于妊娠反应的药物“反应停”。导致了成千上万的畸胎,波及世界各地,受害人数超过15000人。该事件被公认为史上最大的药害事件。 受药物影响的孕妇生出的婴儿没有手臂和腿,手直接连在躯干上,形似海豹,被称为“海豹肢”,这样的畸形婴儿死亡率达50%以上。 这个在市场上流通了6年的药品没有经过严格的临床试验,并且最初生产该药品的药厂隐瞒了收到的有关该药品毒性的一百

测序研究新突破!充电石墨可让DNA“跳芭蕾”

当美国伊利诺伊州大学的研究人员准备研究一种控制DNA如何在小型测序设备里移动的工具时,他们并不知道他们将见证一场分子体操秀。快速、精确、可负担的DNA测序是朝个性化医疗迈出的第一步。在一片石墨薄膜层上让DNA分子经过一个小孔——纳米孔使得科学家们可以读取DNA序列;然而,他们对DNA移动经过这个纳米孔的速率的控制非常有限。在期刊《自然通信》上发表的一项最新研究里,伊利诺伊州大学的物理学教授阿列克

快速基因测序救命于襁褓——不明病因婴儿将从中受益,但伦理问题引发担忧

患病新生儿的基因组将在24小时内测序获得,从而为临床医生提供快速诊断依据。 在只有两个月大时,这个男孩就已命悬一线。他整个暂短的人生是在美国密苏里州堪萨斯城儿童慈善医院新生儿重症监护室里度过的,内科医生们绞尽脑汁地寻找导致其异常状况的病因所在。2013年4月,这名男婴的肝脏开始衰竭,医护人员告诉他的父母前景不容乐观。 随后,来自儿童慈善医院的遗传学家Stephen Kingsmore和他的

Baidu
map
Baidu
map
Baidu
map