CXCR7 Receptor Controls the Maintenance of Subpial Positioning of Cajal-Retzius Cells.

CXCR7 Receptor Controls the Maintenance of Subpial Positioning of Cajal-Retzius Cells.
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CXCR7 受体控制 Cajal-Retzius 细胞软膜下定位的维持

DOI:
10.1093/cercor/bhu164
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Rossel M
Rossel M
中科院分区:
医学2区
文献类型:
--
作者:
Trousse F;Poluch S;Pierani A;Dutriaux A;Bock HH;Nagasawa T;Verdier JM;Rossel M

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Cajal-Retzius (CR) 细胞对于皮质发育和分层至关重要。这些先驱神经元来自不同的祖细胞来源,包括皮质下缘和大脑皮层-大脑皮层下边界(PSB)的腹侧大脑皮层。 CXCR4 是趋化因子 CXCL12 的典型受体,控制着血红细胞来源的 CR 细胞的表面位置。然而,最近的研究表明,CXCR7(第二种 CXCL12 受体)也在早期发育阶段的 CR 细胞中表达。因此,我们使用多种功能丧失方法研究了 CXCR7 在 CR 细胞发育过程中的作用。Cxcr7 基因失活导致大脑皮层内 Reelin 阳性细胞的异常定位。此外,与Cxcr4敲除小鼠相比,Cxcr7−/−小鼠的特点是背侧大脑皮层外侧部分异位CR细胞显着积累。使用基因靶向或药理学受体抑制的功能丧失方法揭示了 CXCR7 和 CXCR4 在 CR 定位中均起作用。最后,表达 Dbx1 的祖细胞中的条件性 Cxcr7 缺失表明 CXCR7 在控制 PSB 衍生 CR 细胞亚群的定位中发挥着重要作用。我们的数据表明,CXCR7 在 hem 和 PSB 衍生的 CR 细胞的定位中发挥作用,CXCL12 通过 CXCR4 和 CXCR7 的联合作用调节 CR 细胞软膜下定位。
Cajal–Retzius (CR) cells are essential for cortical development and lamination. These pioneer neurons arise from distinct progenitor sources, including the cortical hem and the ventral pallium at pallium–subpallium boundary (PSB). CXCR4, the canonical receptor for the chemokine CXCL12, controls the superficial location of hem-derived CR cells. However, recent studies showed that CXCR7, a second CXCL12 receptor, is also expressed in CR cells at early developmental stages. We thus investigated the role of CXCR7 during CR cell development using multiple loss-of-function approaches.Cxcr7gene inactivation led to aberrant localization of Reelin-positive cells within the pallium. In addition,Cxcr7−/−mice were characterized by significant accumulation of ectopic CR cells in the lateral part of the dorsal pallium compared withCxcr4knockout mice. Loss-of-function approaches, using either gene targeting or pharmacological receptor inhibition, reveal that CXCR7 and CXCR4 act both in CR positioning. Finally, conditionalCxcr7deletion in cells derived fromDbx1-expressing progenitors indicates an essential role of CXCR7 in controlling the positioning of a subpopulation of PSB-derived CR cells. Our data demonstrate that CXCR7 has a role in the positioning of hem and PSB-derived CR cells, CXCL12 regulating CR cell subpial localization through the combined action of CXCR4 and CXCR7.
DOI: 10.1242/dev.02209
发表时间: 2006-02-01
期刊: DEVELOPMENT
影响因子: 4.6
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