Opposing Wnt signals regulate cervical squamocolumnar homeostasis and emergence of metaplasia.

Opposing Wnt signals regulate cervical squamocolumnar homeostasis and emergence of metaplasia.
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相反的Wnt信号调节宫颈鳞状突的动态平衡和化生的出现。

DOI:
10.1038/s41556-020-00619-0
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发表时间:
2021-03
影响因子:
21.3
通讯作者:
Meyer TF
Meyer TF
中科院分区:
生物学1区
文献类型:
--
作者:
Chumduri C;Gurumurthy RK;Berger H;Dietrich O;Kumar N;Koster S;Brinkmann V;Hoffmann K;Drabkina M;Arampatzi P;Son D;Klemm U;Mollenkopf HJ;Herbst H;Mangler M;Vogel J;Saliba AE;Meyer TF

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鳞状上皮和柱状上皮的过渡区构成癌症出现的热点,通常在化生之前,其中一种上皮类型被另一种上皮类型取代。目前尚不清楚上皮的空间组织是如何维持的,以及在化生过程中过渡区龛是如何重塑的。在这里,我们使用单细胞RNA测序来表征上皮细胞亚群和子宫内膜和外宫颈的底层基质室,包括过渡区。小鼠谱系追踪,类器官培养和单分子RNA原位杂交显示,这两个上皮细胞来自不同的宫颈驻留谱系特异性干细胞群,由来自基质的相反Wnt信号调控。使用宫颈化生的小鼠模型,我们进一步表明,子宫颈内基质经历重塑,并增加Wnt抑制剂Dickkopf-2(DKK 2)的表达,促进宫颈外干细胞的生长。我们的数据表明,在过渡区的稳态结果从不同的基质信号,驱动居民上皮细胞系的差异增殖。Chumduri,Gurumurthy等人表明,宫颈鳞状上皮和柱状上皮来源于两个干细胞群体,由相反的Wnt信号调节,并且Wnt抑制环境可以诱导化生。
The transition zones of the squamous and columnar epithelia constitute hotspots for the emergence of cancer, often preceded by metaplasia, in which one epithelial type is replaced by another. It remains unclear how the epithelial spatial organization is maintained and how the transition zone niche is remodelled during metaplasia. Here we used single-cell RNA sequencing to characterize epithelial subpopulations and the underlying stromal compartment of endo- and ectocervix, encompassing the transition zone. Mouse lineage tracing, organoid culture and single-molecule RNA in situ hybridizations revealed that the two epithelia derive from separate cervix-resident lineage-specific stem cell populations regulated by opposing Wnt signals from the stroma. Using a mouse model of cervical metaplasia, we further show that the endocervical stroma undergoes remodelling and increases expression of the Wnt inhibitor Dickkopf-2 (DKK2), promoting the outgrowth of ectocervical stem cells. Our data indicate that homeostasis at the transition zone results from divergent stromal signals, driving the differential proliferation of resident epithelial lineages. Chumduri, Gurumurthy et al. show that cervical squamous and columnar epithelia derive from two stem cell populations, regulated by opposing Wnt signals, and that a Wnt-repressive environment can induce metaplasia.
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