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Acta Haematologica: 新生儿脐带血的正常值和独特的形态学特征

2021-11-21 MedSci原创 MedSci原创

本研究描述了新生儿CB的正常值和独特的形态学特征。CB中丰富的形态异常淋巴细胞可能代表出生时免疫系统的不成熟状态。

脐带血(CB)一直是研究和各种临床应用的宝贵造血干细胞来源,也可用于诊断新生儿的各种疾病和状况。CB 细胞成分的一些参数可以由自动分析仪提供,而其他参数,如未成熟或异常细胞,需要血膜形态评估。以往的研究表明,CB中的白细胞群可能与正常外周血(PB)不同,不仅存在未成熟细胞,而且还存在其他类型的细胞。例如,自然杀伤(NK)细胞在PB和CB中分别占淋巴细胞的10%和30%。国外进行一研究,目的是建立正常的 CB 形态,并确定 CB 中形态异常白细胞的患病率。

对取自健康母亲所生的健康足月和适当胎龄新生儿、早产新生儿、糖尿病母亲的新生儿和小于胎龄新生儿的 100 个 CB 样本进行了全面的形态学分析。采集时间为1年,100例CB样本分别来自54名男性和46名女性新生儿。评估血细胞计数,并由实验室专家进行人工形态学分析。100个CB样本中有12个来自患有以下疾病的母亲所生的新生儿:甲状腺功能减退症,产后,妊娠期间巨细胞病毒感染,母亲治疗选择性5 -羟色胺再摄取抑制剂,分娩期间抗生素治疗,所有病例都很少(少于5例),其中3例无法进一步分析。因此将这12个样本排除在进一步分析之外。

图1:脐带血(CB)样本的血液学评估

图2: 淋巴细胞亚型的形态学评估

图3:脐带血样本按新生儿状态分类。88份脐带血样本根据不同的新生儿状态进行分组(A-F)分析,见表(右)。左:每组中样品出生体重、胎龄和APGAR5的平均标准差

结果显示正常CB标本手工差示计数:中性粒细胞47.8±10.7%,淋巴细胞31.2±9.8%,单核细胞10.0±4.0%,嗜酸性粒细胞3.0±2.5%,性别差异无统计学意义。在 44/100 个样品中观察到爆炸,每个样品平均为 0.5±0.7%,并且仅观察到轻微的左移。无论新生儿状态如何,样本中都存在大量大颗粒淋巴细胞(占淋巴细胞总数的 19.1±10.6%)和形态异常的淋巴细胞(占淋巴细胞总数的 12.4±5.4%)。早产 CB 样本与正常足月 CB 样本的差异显着,包括中性粒细胞/淋巴细胞比率的逆转和嗜碱性粒细胞的缺乏。

图4:根据新生儿状态区分主要类型白细胞计数。

图5: 根据新生儿状态区分淋巴细胞亚型计数。

图6:脐带血样本红细胞形态分析

总的来说,本研究描述了新生儿CB的正常值和独特的形态学特征。CB中丰富的形态异常淋巴细胞可能代表出生时免疫系统的不成熟状态。

 

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    2021-12-20 changfy
  2. [GetPortalCommentsPageByObjectIdResponse(id=2008541, encodeId=3e79200854142, content=<a href='/topic/show?id=1066844469' target=_blank style='color:#2F92EE;'>#HAE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=86, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8444, encryptionId=1066844469, topicName=HAE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=32d177, createdName=changfy, createdTime=Mon Dec 20 02:20:12 CST 2021, time=2021-12-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1850137, encodeId=04b0185013e5f, content=<a href='/topic/show?id=61815385aa' target=_blank style='color:#2F92EE;'>#CTA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=79, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5385, encryptionId=61815385aa, topicName=CTA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ec9955, createdName=windight, createdTime=Mon Apr 04 15:20:12 CST 2022, time=2022-04-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1317670, encodeId=5a40131e67080, content=<a href='/topic/show?id=74916e0414' target=_blank style='color:#2F92EE;'>#EMA#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6704, encryptionId=74916e0414, topicName=EMA)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a35a460, createdName=fengyi812, createdTime=Mon Nov 22 14:20:12 CST 2021, time=2021-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1355180, encodeId=eb1b1355180c1, content=<a href='/topic/show?id=3b47846692b' target=_blank style='color:#2F92EE;'>#脐带血#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84669, encryptionId=3b47846692b, topicName=脐带血)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=zhaojie88, createdTime=Mon Nov 22 14:20:12 CST 2021, time=2021-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1542433, encodeId=a29b154243368, content=<a href='/topic/show?id=82c0846654a' target=_blank style='color:#2F92EE;'>#脐带#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=111, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84665, encryptionId=82c0846654a, topicName=脐带)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f06713409761, createdName=1249859em42(暂无昵称), createdTime=Mon Nov 22 14:20:12 CST 2021, time=2021-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1072613, encodeId=aec410e261390, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=94, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=c2385527338, createdName=云同学, createdTime=Sun Nov 21 21:19:53 CST 2021, time=2021-11-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1072480, encodeId=dfba10e24806c, content=学习了!!!, beContent=null, objectType=article, channel=null, level=null, likeNumber=104, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fa945324185, createdName=马永芳, createdTime=Sun Nov 21 11:49:45 CST 2021, time=2021-11-21, status=1, ipAttribution=)]
    2022-04-04 windight
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    2021-11-22 fengyi812
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    2021-11-21 云同学

    学习了

    0

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    2021-11-21 马永芳

    学习了!!!

    0

拓展阅读

7.00!还是7.1、7.2?足月儿脐带血pH值与婴儿患病率和死亡率的关系

JAMA Netork Open近期刊登了丹麦一项全国队列研究的结果,研究称脐带血pH值<7.2增加新生儿不良结局风险,或有必要重新考虑加强监护的阈值。

JAMA子刊:脐带血蛋白与出生体重及早期生长轨迹的关系

7种脐带血蛋白质与出生体重和生命早期的生长轨迹显著相关。

JP:早产儿的脐带血能够作为新生儿血液检测的替代样本吗?

在非常早产儿中,脐带血中的Hb和Hct浓度与静脉新生儿血液中的测量值相似,可以作为新生儿血液检测的有效替代样本。

JAMA子刊:接受成人血或脐带血红细胞输注的早产儿,脑组织氧合有差异吗?

这项队列研究的结果提示,与输注CB-RBC相比,输注A-RBC可能与向早产儿脑组织提供更多的氧相关。这一发现可以解释先前观察到的低HbF和高ROP风险之间的关联。

再认识脐带血!孙自敏教授:我们为什么能对它寄予厚望

成体干细胞国家地方实验室有幸对话孙自敏教授,内容整理如下,以飨读者。

孕妇阳了,会影响脐带血吗?

卫健委也在健康中国公众号上进行科普:“新冠病毒是呼吸道病毒,不会经输血传播。目前为止,全球尚没有新冠病毒通过输血途径传播的报道。

儿童恶性血液病脐带血移植专家共识

中华医学会儿科学分会血液学组 · 2016-11-01

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