Baidu
map

Blood:镰状细胞病和β-地中海贫血胎儿血红蛋白诱导表达的异质性机制

2020-04-18 QQY MedSci原创

在全基因转录组、蛋白质组和已知HbF调节因子的表达中,F-红细胞与非HbF表达细胞高度相似。

扭转从胎儿血红蛋白(HbF、α2γ2)到成人(HbA,α2β2)血红蛋白的切换发展是镰状细胞病(SCD)和β-地中海贫血的一种重要的治疗方法。在健康人、SCD患者和接受药物HbF诱导物治疗的患者中,HbF只存在于被称为F细胞的红细胞亚群中。

尽管经过了50多年的观察,即使在基因相同的细胞中,这种HbF异细胞表达模式的原因仍未明确。

成人F细胞可能代表一种从既定细胞向胚胎样表观遗传和转录状态的逆转,或者说,γ-globin基因孤立性的转录和转录后事件可能是异细胞表达模式的基础。

在本研究中,研究人员通过开发从人HUDEP2类红细胞细胞系和原代人红细胞培养中分离出与分化阶段相匹配的晚期成红细胞F细胞和非F细胞(A细胞)的技术来了解HbF活化的异质性。

这些细胞的转录和蛋白质组学分析表明,无论是在基线条件下,还是在使用HbF诱导物羟基脲或波马度胺治疗后,F细胞和A细胞在RNA水平上的差异都非常小。

令人惊讶的是,研究人员没有发现任何已知的HbF调节因子,包括BCL11A或LRF,在表达上存在差异,这或可解释HbF的激活。

本研究表明F成红细胞与不表达HbF的细胞没有显著差异,主要差异可能发生在b-珠蛋白位点的转录水平。

原始出处:

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=1716308, encodeId=641f1e16308be, content=<a href='/topic/show?id=85af8363066' target=_blank style='color:#2F92EE;'>#胎儿血红蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83630, encryptionId=85af8363066, topicName=胎儿血红蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9b7b32200403, createdName=windight, createdTime=Wed Feb 03 19:46:52 CST 2021, time=2021-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1575516, encodeId=47ca15e551652, content=<a href='/topic/show?id=cd9941326bc' target=_blank style='color:#2F92EE;'>#地中海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41326, encryptionId=cd9941326bc, topicName=地中海)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=303116130321, createdName=wgx311, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1615521, encodeId=95e0161552113, content=<a href='/topic/show?id=280196865f7' target=_blank style='color:#2F92EE;'>#镰状细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96865, encryptionId=280196865f7, topicName=镰状细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cb4819654385, createdName=1508842480_96220443, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1039227, encodeId=899c103922ec0, content=机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=肿肿, createdTime=Sat Apr 18 16:46:52 CST 2020, time=2020-04-18, status=1, ipAttribution=)]
  2. [GetPortalCommentsPageByObjectIdResponse(id=1716308, encodeId=641f1e16308be, content=<a href='/topic/show?id=85af8363066' target=_blank style='color:#2F92EE;'>#胎儿血红蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83630, encryptionId=85af8363066, topicName=胎儿血红蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9b7b32200403, createdName=windight, createdTime=Wed Feb 03 19:46:52 CST 2021, time=2021-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1575516, encodeId=47ca15e551652, content=<a href='/topic/show?id=cd9941326bc' target=_blank style='color:#2F92EE;'>#地中海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41326, encryptionId=cd9941326bc, topicName=地中海)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=303116130321, createdName=wgx311, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1615521, encodeId=95e0161552113, content=<a href='/topic/show?id=280196865f7' target=_blank style='color:#2F92EE;'>#镰状细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96865, encryptionId=280196865f7, topicName=镰状细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cb4819654385, createdName=1508842480_96220443, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1039227, encodeId=899c103922ec0, content=机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=肿肿, createdTime=Sat Apr 18 16:46:52 CST 2020, time=2020-04-18, status=1, ipAttribution=)]
    2020-04-20 wgx311
  3. [GetPortalCommentsPageByObjectIdResponse(id=1716308, encodeId=641f1e16308be, content=<a href='/topic/show?id=85af8363066' target=_blank style='color:#2F92EE;'>#胎儿血红蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83630, encryptionId=85af8363066, topicName=胎儿血红蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9b7b32200403, createdName=windight, createdTime=Wed Feb 03 19:46:52 CST 2021, time=2021-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1575516, encodeId=47ca15e551652, content=<a href='/topic/show?id=cd9941326bc' target=_blank style='color:#2F92EE;'>#地中海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41326, encryptionId=cd9941326bc, topicName=地中海)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=303116130321, createdName=wgx311, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1615521, encodeId=95e0161552113, content=<a href='/topic/show?id=280196865f7' target=_blank style='color:#2F92EE;'>#镰状细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96865, encryptionId=280196865f7, topicName=镰状细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cb4819654385, createdName=1508842480_96220443, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1039227, encodeId=899c103922ec0, content=机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=肿肿, createdTime=Sat Apr 18 16:46:52 CST 2020, time=2020-04-18, status=1, ipAttribution=)]
  4. [GetPortalCommentsPageByObjectIdResponse(id=1716308, encodeId=641f1e16308be, content=<a href='/topic/show?id=85af8363066' target=_blank style='color:#2F92EE;'>#胎儿血红蛋白#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=149, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83630, encryptionId=85af8363066, topicName=胎儿血红蛋白)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9b7b32200403, createdName=windight, createdTime=Wed Feb 03 19:46:52 CST 2021, time=2021-02-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1575516, encodeId=47ca15e551652, content=<a href='/topic/show?id=cd9941326bc' target=_blank style='color:#2F92EE;'>#地中海#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=119, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=41326, encryptionId=cd9941326bc, topicName=地中海)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=303116130321, createdName=wgx311, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1615521, encodeId=95e0161552113, content=<a href='/topic/show?id=280196865f7' target=_blank style='color:#2F92EE;'>#镰状细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96865, encryptionId=280196865f7, topicName=镰状细胞)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=cb4819654385, createdName=1508842480_96220443, createdTime=Mon Apr 20 04:46:52 CST 2020, time=2020-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1039227, encodeId=899c103922ec0, content=机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要, beContent=null, objectType=article, channel=null, level=null, likeNumber=99, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=肿肿, createdTime=Sat Apr 18 16:46:52 CST 2020, time=2020-04-18, status=1, ipAttribution=)]
    2020-04-18 肿肿

    机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要

    0

相关资讯

FDA授予FT-4202治疗镰状细胞病的孤儿药称号

专注于罕见血液学疾病和癌症的临床阶段生物制药公司FORMA近日宣布,美国FDA已授予其FT-4202孤儿药称号,FT-4202目前正处于临床开发中,可作为镰状细胞病(SCD)的潜在疗法。

Blood:预防性抗凝或可降低镰状细胞病血管阻塞性危象的发病率

血管阻塞性危象(VOC)是镰状细胞病(SCD)发病和住院的主要原因。但目前只有三种治疗方法(羟基脲、l-谷氨酰胺和crizanlizumab)被批准用于治疗SCD。这些药物限制了血管阻塞性危象的持续时间、严重程度和发生频率。凝血激活是SCD的一个标志。对SCD动物模型的研究表明,凝血可导致慢性炎症和与SCD相关的终末器官损伤。但凝血是否直接导致引发VOC的微血管停滞仍是不明确。在本研究中,研究人员

诺华的Adakveo获得FDA批准治疗镰状细胞性疼痛

诺华宣布其Adakveo(crizanlizumab)获得美国食品药品监督管理局(FDA)批准,用于减少镰状细胞病患者的疼痛发作频率。该药物以前称为SEG101,已被批准用于减少16岁及以上患有该疾病的成年和儿科患者的血管闭塞性危机(VOC)。

Aruvant的镰状细胞病基因疗法ARU-1801获得FDA授予的罕见儿科疾病资格称号

生物制药公司Aruvant今天宣布,美国食品药品管理局授予授予其ARU-1801治疗镰状细胞病的罕见儿科疾病资格称号(RPD)。

2019 ASH指南:镰状细胞病——心肺和肾脏疾病

2019年12月,美国血液病学会(ASH)发布了镰状细胞病指南——心肺和肾脏疾病的管理。终末期器官疾病的预防和管理是成人和儿童镰状细胞病(SCD)患者面临的主要调整,SCD患者心肺和肾脏疾病的筛查、诊断和管理的不确定性可可变性导致患者的不同结局。本文主要针对镰状细胞病患者心肺和肾脏并发症的筛查,诊断以及管理提出10条循证建议。对成人SCD以及静脉血栓栓塞患者的抗凝治疗时间也提出了建议。

Blood:输血可逆转镰状细胞病的异常血管生成

中心点:缓慢的RBC流动和血管堵塞触发了HIF-1α诱导的异常血管生长的促血管生成环境。在SCD小鼠中,输血可逆转新血管的生成,突出了BM血管系统的可塑性。摘要:镰状细胞病(SCD)是一种高发病率、高死亡率的单基因红细胞病。本文首次报道了SCD对骨髓(BM)血管生态位(对造血至关重要)的影响。研究人员在SCD小鼠中发现了一个无组织的、结构异常的BM血管网络,该BM腔的大部分都是高度弯曲的小动脉,以

Baidu
map
Baidu
map
Baidu
map