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乾思來說說干細(xì)胞是什么

時(shí)間:2013-6-17閱讀:900
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乾思來說說干細(xì)胞是什么  

干細(xì)胞是一類具有自我更新和多向分化潛能的細(xì)胞, 按照生存階段分為胚胎干細(xì)胞和成體干細(xì)胞。干細(xì)胞的發(fā)育受多種內(nèi)在機(jī)制和微環(huán)境因素的影響,能夠產(chǎn)生高度分化的功能細(xì)胞。 

臨床干細(xì)胞來源有兩種情況。1、來源于:新生兒出生時(shí),胎盤、臍帶組織和臍帶。由于這些干細(xì)胞是在人體發(fā)育的早期形成,組織特異性抗原的表達(dá)程度還比較低,因而可以比較容易地應(yīng)用在其他人身上。經(jīng)過誘導(dǎo),這些干細(xì)胞還可以發(fā)育成其他系統(tǒng)的細(xì)胞,實(shí)用性很強(qiáng),因而成為繼骨髓干細(xì)胞之后臨床廣為應(yīng)用的干細(xì)胞。 

2、來源于:成人骨髓干細(xì)胞,其中包括造血干細(xì)胞和間質(zhì)干細(xì)胞。前者分化出所有類型的血細(xì)胞,后者可以產(chǎn)生骨、軟骨和脂肪細(xì)胞。其他組織也可提取到干細(xì)胞,如皮膚、小腸、大腦、眼睛、胰臟、肝臟、脂肪、肌肉、羊水、月經(jīng)血、乳汁等,但目前這方面仍處于研究階段。 

干細(xì)胞臨床應(yīng)用在 異常的干細(xì)胞本身是疾病之源,比如地中海貧血等遺傳性血液病,它就是由于造血干細(xì)胞基因變異,造成分化形成的紅細(xì)胞不能有效地輸送氧氣;癌癥細(xì)胞無節(jié)制地大量增殖,原因也在于干細(xì)胞階段發(fā)生了突變。 

干細(xì)胞有生成身體內(nèi)所有類型的細(xì)胞的能力,當(dāng)前世界上許多國家都投入大量經(jīng)費(fèi)研究干細(xì)胞??茖W(xué)家們已經(jīng)開始利用患者自身的干細(xì)胞長出新的組織,比如長出皮膚用于大面積燒傷患者,長出新的血管神經(jīng)來代替已經(jīng)損壞的血管神經(jīng)。并且嘗試在體外長出骨、軟骨、氣管,甚至完整的器官,如心臟、肝臟、腎臟等。 

儲存臨床用干細(xì)胞的技術(shù)平臺被稱為干細(xì)胞庫或干細(xì)胞藥房,據(jù)美國干細(xì)胞專家戴維·沃伯頓介紹,20年后干細(xì)胞藥房將遍地開花。實(shí)際上,自1992年美國紐約建立*個臍血庫后,*已建上百個臍血庫,我國至今已有近10個臍血庫。我們中心及合作企業(yè)相繼在世界上*臍帶間充質(zhì)干細(xì)胞庫、胎盤亞干細(xì)胞庫、胎盤造血干細(xì)胞庫。另外,還有胚胎干細(xì)胞庫、脂肪干細(xì)胞庫、宮內(nèi)膜干細(xì)胞庫等等。  

乾思生物專注于細(xì)胞學(xué)相關(guān)產(chǎn)品的研發(fā)和生產(chǎn),主要包括ATCC細(xì)胞、人正常細(xì)胞,動物細(xì)胞,細(xì)胞株,細(xì)胞系,原代細(xì)胞,細(xì)胞培養(yǎng)試劑,培養(yǎng)基,胎牛血清等等。

乾思生物整理編輯: 進(jìn)口elisa試劑盒,國產(chǎn)elisa試劑盒,elisa試劑盒,試劑盒,dna提取試劑盒,免疫組化試劑盒,rna提取試劑盒,質(zhì)粒提取試劑盒,dna試劑盒

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