Lgr5-expressing cells are sufficient and necessary for postnatal mammary gland organogenesis.

Lgr5-expressing cells are sufficient and necessary for postnatal mammary gland organogenesis.
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DOI:
10.1016/j.celrep.2012.12.017
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发表时间:
2013-01-31
期刊:
影响因子:
8.8
通讯作者:
Werb Z
Werb Z
中科院分区:
生物学1区
文献类型:
--
作者:
Plaks V;Brenot A;Lawson DA;Linnemann JR;Van Kappel EC;Wong KC;de Sauvage F;Klein OD;Werb Z

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在出生后乳腺发育的各个阶段,乳腺上皮干细胞对组织扩张和重塑至关重要。基底乳腺上皮细胞富含wnt反应细胞,移植到小鼠体内后可重建清除的乳腺脂肪垫。Lgr5是wnt调控的靶基因,是小肠、结肠、胃、毛囊和肾肾单位中主要的干细胞标记物。在这里,我们证明了一种罕见的表达Lgr5 (Lgr5+)的乳腺上皮细胞(MECs)具有突出的再生潜力。我们发现Lgr5+细胞存在于基底细胞群中,在再生功能性乳腺(mg)方面优于其他基底细胞,在单细胞重建mg方面特别有效,并且在连续移植中表现出再生能力。从移植的mec或青春期mg细胞中提取Lgr5+细胞的功能缺失和耗竭实验表明,这些细胞不仅是产后乳腺器官发生的充分条件,而且是必要条件。
Mammary epithelial stem cells are vital to tissue expansion and remodeling during various phases of postnatal mammary development. Basal mammary epithelial cells are enriched in Wnt-responsive cells and can reconstitute cleared mammary fat pads upon transplantation into mice. Lgr5 is a Wnt-regulated target gene and was identified as a major stem cell marker in the small intestine, colon, stomach, hair follicle and also in kidney nephrons. Here we demonstrate the outstanding regenerative potential of a rare population of Lgr5-expressing (Lgr5+) mammary epithelial cells (MECs). We found that Lgr5+ cells reside within the basal population, are superior to other basal cells in regenerating functional mammary glands (MGs), are exceptionally efficient in reconstituting MGs from single cells and exhibit regenerative capacity in serial transplantations. Loss-of-function, depletion experiments of Lgr5+ cells from transplanted MECs or from pubertal MGs revealed that these cells are not only sufficient but also necessary for postnatal mammary organogenesis.
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发表时间: 2012-09-01
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