Regeneration, repair and remembering identity: the three Rs of Hox gene expression.

Regeneration, repair and remembering identity: the three Rs of Hox gene expression.
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DOI:
10.1016/j.tcb.2009.03.007
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发表时间:
2009-06
影响因子:
19
通讯作者:
Chang HY
Chang HY
中科院分区:
生物学1区
文献类型:
--
作者:
Wang KC;Helms JA;Chang HY

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Hox 基因编码转录因子,这些转录因子指定细胞中的胚胎位置并指导组织分化。最近的进展大大增加了我们对表观遗传机制的理解,这些机制确保了 Hox 基因在成体细胞中的忠实表达,并且涉及组蛋白甲基化、去甲基化和长非编码 RNA 基因间转录的相互作用。 Hox 基因的转录记忆给再生医学带来了机遇和挑战。将移植干细胞的位置特征与宿主环境的位置特征相匹配(如它们各自的 Hox 图谱所反映的那样)可能是实现再生愈合所必需的。操纵 Hox 基因表达可塑性的策略可能会成为再生医学的主要焦点。
Hox genes encode transcription factors that specify embryonic positional identity in cells and guide tissue differentiation. Recent advances have greatly increased our understanding of the epigenetic mechanisms that ensure the faithful expression of Hox genes in adult cells and which involve the interplay of histone methylation, demethylation and intergenic transcription of long non-coding RNAs. The transcriptional memory of Hox genes poses both an opportunity and a challenge for regenerative medicine. Matching the positional identity of transplanted stem cells with that of the host environment, as reflected by their respective Hox profiles, is likely to be required to achieve regenerative healing. Strategies to manipulate the plasticity of Hox gene expression will probably become a major focus in regenerative medicine.
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