Expression of PTPRO in the interneurons of adult mouse olfactory bulb.

Expression of PTPRO in the interneurons of adult mouse olfactory bulb.
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DOI:
10.1002/cne.22239
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发表时间:
2010-01-10
期刊:
The Journal of comparative neurology
影响因子:
--
通讯作者:
Matozaki T
Matozaki T
中科院分区:
其他
文献类型:
--
作者:
Kotani T;Murata Y;Ohnishi H;Mori M;Kusakari S;Saito Y;Okazawa H;Bixby JL;Matozaki T

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PTPRO是一种受体型蛋白酪氨酸磷酸酶(PTP),在其胞质区域具有单个催化结构域,在其胞外区域具有多个纤连蛋白III型样结构域。在鸡中,PTPRO mRNA已被证明在胚胎脑中特别丰富,并且PTPRO涉及胚胎发育期间的轴突生长和指导。然而,PTPRO蛋白在哺乳动物CNS中,特别是在幼年和成年哺乳动物脑中的时间和空间表达尚未进行任何详细评估。通过与PTPRO的单克隆抗体的荧光分析,我们表明,PTPRO是广泛表达的整个小鼠大脑从胚胎第16天到出生后第1天,而表达主要局限于嗅球(OB)和嗅结节在成年大脑。在OB中,PTPRO蛋白主要在外网状层、颗粒细胞层和肾小球层(GL)中表达。在这些区域中,PTPRO的表达主要在中间神经元如γ-氨基丁酸(GABA)能或钙视黄蛋白(CR)阳性颗粒细胞中。此外,PTPRO在GL中的GABA能、CR阳性、酪氨酸羟化酶阳性或神经钙蛋白阳性的肾小球周围细胞中表达。PTPRO与其他神经元标记物的共染色表明,PTPRO可能定位于这些嗅觉中间神经元的树突或树突棘。因此,PTPRO可能参与了成年小鼠OB树突形态或中间神经元突触形成的调节。
PTPRO is a receptor-type protein tyrosine phosphatase (PTP) with a single catalytic domain in its cytoplasmic region and multiple fibronectin type III-like domains in its extracellular region. In the chick, PTPRO mRNA has been shown to be particularly abundant in embryonic brain, and PTPRO is implicated in axon growth and guidance during embryonic development. However, the temporal and spatial expression of PTPRO protein in the mammalian CNS, particularly in the juvenile and adult mammalian brain, has not been evaluated in any detail. By immunohistofluorescence analysis with a monoclonal antibody to PTPRO, we show that PTPRO is widely expressed throughout the mouse brain from embryonic day 16 to postnatal day 1, while expression is largely confined to the olfactory bulb (OB) and olfactory tubercle in the adult brain. In the OB, PTPRO protein is expressed predominantly in the external plexiform layer, the granule cell layer, and the glomerular layer (GL). In these regions, expression of PTPRO is predominant in interneurons such as γ-aminobutyric acid (GABA)-ergic or calretinin (CR)-positive granule cells. In addition, PTPRO is expressed in GABAergic, CR-positive, tyrosine hydroxylase-positive, or neurocalcin-positive periglomerular cells in the GL. Costaining of PTPRO with other neuronal markers suggests that PTPRO is likely to be localized to the dendrites or dendritic spines of these olfactory interneurons. Thus, PTPRO might participate in regulation of dendritic morphology or synapse formation of interneurons in the adult mouse OB.
多个EPHB受体酪氨酸激酶在海马中塑造树突状刺。
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