Baidu
map

PLoS Biol:大脑中的酶可以预防老年痴呆及其他神经退行性疾病

2016-06-12 佚名 生物谷

保护大脑免受氧化损伤的酶也能预防蛋白粘斑的形成,从而起到预防老年痴呆、帕金森和其他神经退行性疾病的作用。这是由印第安纳大学的研究者们得出的实验结果,相关论文发表在PLOS Biology杂志。他们相信这一发现将为认知功能保护类新药的研发提供新的方向。 蛋白粘斑的聚集发生于很多神经退行性疾病,如老年痴呆症、帕金森氏病和肌萎缩性侧索硬化症(又叫卢伽雷氏病)等。如研究发现老年痴呆症患者会有tau蛋白

保护大脑免受氧化损伤的酶也能预防蛋白粘斑的形成,从而起到预防老年痴呆、帕金森和其他神经退行性疾病的作用。这是由印第安纳大学的研究者们得出的实验结果,相关论文发表在PLOS Biology杂志。他们相信这一发现将为认知功能保护类新药的研发提供新的方向。

蛋白粘斑的聚集发生于很多神经退行性疾病,如老年痴呆症、帕金森氏病和肌萎缩性侧索硬化症(又叫卢伽雷氏病)等。如研究发现老年痴呆症患者会有tau蛋白的累积,这些蛋白在神经细胞中聚集会形成缠结物。这一过程被称为蛋白致病,很多不同类的脑部疾病都存在不同种类蛋白的积累,且在疾病的发生过程中有重要作用。而在本研究中,他们发现一种酶可能具有阻止蛋白致病这一过程的功能。

高水平的NMNAT2可能减缓认知功能的下降

为验证他们的假设,该研究团队分析了500多例老年死者的大脑,这些老年人生前都参与过拉什记忆与衰老项目,在那个项目中,每位参与者的认知功能每年都被评估。研究者们关注烟酰胺单核苷酸腺苷酰转移酶2(简称NMNAT2)的水平,该酶可以生成尼古丁腺嘌呤二核苷酸(NAD),从而保护我们的大脑免受神经细胞活动过多导致的氧化损伤。通过分析,研究者们发现脑部NMNAT2水平较高的成年人认知下降的可能性较低,而该酶水平较低的人更有可能患痴呆症。这一发现表明除了保护大脑免受氧化压力伤害,NMNAT2还可以保护大脑免受记忆和学习能力的损伤。

NMNAT2水平高的小鼠tau蛋白水平低

接下来,该研究小组分析了tau蛋白水平较高的小鼠的大脑,他们发现海马区NMNAT2水平较高的小鼠tau蛋白的水平较低。

此外,他们发现在老年痴呆症患者的脑部,NMNAT2的水平比正常人的少50%,因此,他们推断加强NMNAT2的功能可能为保护认知功能提供有效的治疗方法。总之,研究者们相信这一发现可能为很多神经退行性疾病的治疗提供新的思路和方法。

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=1735360, encodeId=84131e3536090, content=<a href='/topic/show?id=740394686b2' target=_blank style='color:#2F92EE;'>#退行性疾病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94686, encryptionId=740394686b2, topicName=退行性疾病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5a0233899115, createdName=ZGMFX35A, createdTime=Tue Jul 19 15:50:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767014, encodeId=cd631e670143e, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Oct 28 11:50:00 CST 2016, time=2016-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1957128, encodeId=c505195e128c9, content=<a href='/topic/show?id=5879e458629' target=_blank style='color:#2F92EE;'>#神经退行#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74586, encryptionId=5879e458629, topicName=神经退行)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=33b92500139, createdName=12498b37m72暂无昵称, createdTime=Fri Nov 11 14:50:00 CST 2016, time=2016-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=146944, encodeId=582e146944cc, content=拜读了,受益匪浅,点个赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Oct 12 16:11:33 CST 2016, time=2016-10-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917286, encodeId=e84c191e2863d, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Jul 18 04:50:00 CST 2016, time=2016-07-18, status=1, ipAttribution=)]
  2. [GetPortalCommentsPageByObjectIdResponse(id=1735360, encodeId=84131e3536090, content=<a href='/topic/show?id=740394686b2' target=_blank style='color:#2F92EE;'>#退行性疾病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94686, encryptionId=740394686b2, topicName=退行性疾病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5a0233899115, createdName=ZGMFX35A, createdTime=Tue Jul 19 15:50:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767014, encodeId=cd631e670143e, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Oct 28 11:50:00 CST 2016, time=2016-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1957128, encodeId=c505195e128c9, content=<a href='/topic/show?id=5879e458629' target=_blank style='color:#2F92EE;'>#神经退行#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74586, encryptionId=5879e458629, topicName=神经退行)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=33b92500139, createdName=12498b37m72暂无昵称, createdTime=Fri Nov 11 14:50:00 CST 2016, time=2016-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=146944, encodeId=582e146944cc, content=拜读了,受益匪浅,点个赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Oct 12 16:11:33 CST 2016, time=2016-10-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917286, encodeId=e84c191e2863d, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Jul 18 04:50:00 CST 2016, time=2016-07-18, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1735360, encodeId=84131e3536090, content=<a href='/topic/show?id=740394686b2' target=_blank style='color:#2F92EE;'>#退行性疾病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94686, encryptionId=740394686b2, topicName=退行性疾病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5a0233899115, createdName=ZGMFX35A, createdTime=Tue Jul 19 15:50:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767014, encodeId=cd631e670143e, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Oct 28 11:50:00 CST 2016, time=2016-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1957128, encodeId=c505195e128c9, content=<a href='/topic/show?id=5879e458629' target=_blank style='color:#2F92EE;'>#神经退行#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74586, encryptionId=5879e458629, topicName=神经退行)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=33b92500139, createdName=12498b37m72暂无昵称, createdTime=Fri Nov 11 14:50:00 CST 2016, time=2016-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=146944, encodeId=582e146944cc, content=拜读了,受益匪浅,点个赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Oct 12 16:11:33 CST 2016, time=2016-10-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917286, encodeId=e84c191e2863d, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Jul 18 04:50:00 CST 2016, time=2016-07-18, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1735360, encodeId=84131e3536090, content=<a href='/topic/show?id=740394686b2' target=_blank style='color:#2F92EE;'>#退行性疾病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94686, encryptionId=740394686b2, topicName=退行性疾病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5a0233899115, createdName=ZGMFX35A, createdTime=Tue Jul 19 15:50:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767014, encodeId=cd631e670143e, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Oct 28 11:50:00 CST 2016, time=2016-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1957128, encodeId=c505195e128c9, content=<a href='/topic/show?id=5879e458629' target=_blank style='color:#2F92EE;'>#神经退行#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74586, encryptionId=5879e458629, topicName=神经退行)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=33b92500139, createdName=12498b37m72暂无昵称, createdTime=Fri Nov 11 14:50:00 CST 2016, time=2016-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=146944, encodeId=582e146944cc, content=拜读了,受益匪浅,点个赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Oct 12 16:11:33 CST 2016, time=2016-10-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917286, encodeId=e84c191e2863d, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Jul 18 04:50:00 CST 2016, time=2016-07-18, status=1, ipAttribution=)]
    2016-10-12 ylzr123

    拜读了,受益匪浅,点个赞!

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1735360, encodeId=84131e3536090, content=<a href='/topic/show?id=740394686b2' target=_blank style='color:#2F92EE;'>#退行性疾病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94686, encryptionId=740394686b2, topicName=退行性疾病)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5a0233899115, createdName=ZGMFX35A, createdTime=Tue Jul 19 15:50:00 CST 2016, time=2016-07-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1767014, encodeId=cd631e670143e, content=<a href='/topic/show?id=64f5343e2f' target=_blank style='color:#2F92EE;'>#Biol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3437, encryptionId=64f5343e2f, topicName=Biol)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=446937890434, createdName=12498ebem31暂无昵称, createdTime=Fri Oct 28 11:50:00 CST 2016, time=2016-10-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1957128, encodeId=c505195e128c9, content=<a href='/topic/show?id=5879e458629' target=_blank style='color:#2F92EE;'>#神经退行#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=68, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=74586, encryptionId=5879e458629, topicName=神经退行)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=33b92500139, createdName=12498b37m72暂无昵称, createdTime=Fri Nov 11 14:50:00 CST 2016, time=2016-11-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=146944, encodeId=582e146944cc, content=拜读了,受益匪浅,点个赞!, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7s7ZCKOmmbBTD6nE7gcd5OZpvyGEzkxBP3S275k5ZJVrsPkotZhBglRHM9rKvcj1OgkssqhcnoPw8zIaMZTF8c/0, createdBy=4c441942088, createdName=ylzr123, createdTime=Wed Oct 12 16:11:33 CST 2016, time=2016-10-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1917286, encodeId=e84c191e2863d, content=<a href='/topic/show?id=4f26341994' target=_blank style='color:#2F92EE;'>#Bio#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=63, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=3419, encryptionId=4f26341994, topicName=Bio)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=12de429, createdName=sunylz, createdTime=Mon Jul 18 04:50:00 CST 2016, time=2016-07-18, status=1, ipAttribution=)]
    2016-07-18 sunylz

相关资讯

JAD:瑜伽锻炼能降低老年痴呆的发生

          发表在Journal of Alzheimer's Disease的一项新研究结果显示,完成3个月的瑜伽和冥想练习能够显著降低老年人的轻微认知损伤(简称MCI, mild cognitive impairment)及其他痴呆病的发生。 MCI以认知功能出现可见性的变化为主要特征,表现为

Neurology:ABCA7突变可表现典型的阿尔茨海默病

背景:在比利时老年痴呆症患者队列和一种常染色体显性遗传的家族中,识别产生临床和病理表型的患者,这些患者携带ABCA7突变基因并且功能丧失。方法:研究者对可用的数据记录,医疗记录,脑脊液分析结果和神经影响学研究及神经病理学进行回顾性分析。结果:突变携带者平均发病年龄(n = 22)为73.4±8.4岁,年龄范围较宽36(54-90)年,这独立于APOE基因型与脑血管病。平均病程5.7±3年(范围2-

AJHG:OMG!男性寿命更短更易患老年痴呆竟是因为这个

在一段时间内持续产生缺少Y染色体的血细胞被认为是男性平均寿命比女性短的一种生物学解释。最近在国际学术期刊American Journal of Human Genetics上发表了一篇文章,研究人员报告称血液样本中缺失Y染色体的男性还与携带阿尔茨海默病风险基因的人具有几乎相同的患病风险。   "现在大多数遗传学研究都集中在遗传性基因变异方面,但是我们着重研究的是合子突变(postzy

PNAS:中科院院士叶玉如发现新蛋白IL-33可逆转老年痴呆

由香港科技大学和英国格拉斯哥大学的科学家们领导的一项研究发现,一种叫做IL-33的蛋白可以逆转小鼠阿尔茨海默病样的病状和认知功能下降。这项研究发表在4月18日的《美国国家科学院院刊》(PNAS)上。 中科院院士、香港科技大学叶玉如(Nancy Y Ip)教授,及格拉斯哥大学感染、免疫与炎症研究所的Eddy Liew教授是这项研究的共同领导者。叶玉如教授主要研究神经营养因子与神

Neuron:老年痴呆病人为何发生记忆损伤?原因在这里

来自格莱斯顿研究所的研究人员最近在国际学术期刊Neuron上发表了一篇文章,对阿尔茨海默病的主要遗传风险因素如何引起记忆损伤进行了研究,他们在小鼠模型中发现参与记忆回放的重要脑活动受到影响。   他们使用的小鼠模型携带apoE4基因,该基因的蛋白产物能够显著增加阿尔茨海默病的发病风险,并且在65%~80%的阿尔茨海默病病人中都存在该基因的表达。在这项最新研究中,研究人员发现apoE4

Baidu
map
Baidu
map
Baidu
map