A key role for TGF-β1 in hippocampal synaptic plasticity and memory.

A key role for TGF-β1 in hippocampal synaptic plasticity and memory.
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DOI:
10.1038/srep11252
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发表时间:
2015-06-10
期刊:
影响因子:
4.6
通讯作者:
Palmeri A
Palmeri A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Caraci F;Gulisano W;Guida CA;Impellizzeri AA;Drago F;Puzzo D;Palmeri A

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转化生长因子β1(Transforming growth Factor β 1,TGF-β1)是一种重要的神经保护因子和神经营养因子。然而,其参与海马水平突触可塑性和记忆的生理机制尚未得到深入研究。在此,我们研究了TGF-β1在成年野生型小鼠海马长时程增强(LTP)和记忆中的作用。我们的数据提供了外源性TGF-β1能够将早期LTP转化为晚期LTP的证据。此外,我们发现,特异性TGF-β1抑制剂SB 431542阻断内源性TGF-β1信号通路,损害LTP和物体识别记忆。后一种损伤通过给予外源性TGF-β1而被挽救,这表明内源性产生的TGF-β1在LTP和记忆的生理机制中起作用。最后,TGF-β1的功能效应与磷酸化转录因子cAMP反应元件结合蛋白的表达增加相关。
Transforming Growth Factor β1 (TGF-β1) is a well-known neuroprotective and neurotrophic factor demonstrated to play a role in synaptic transmission. However, its involvement in physiological mechanisms underlying synaptic plasticity and memory at hippocampal level has not been thoroughly investigated. Here, we examine the role of TGF-β1 in hippocampal long-term potentiation (LTP) and memory in adult wild type mice. Our data provide evidence that administration of exogenous TGF-β1 is able to convert early-phase-LTP into late-phase-LTP. Furthermore, we show that the block of the endogenous TGF-β1 signaling pathway by the specific TGF-β1 inhibitor SB431542, impairs LTP and object recognition memory. The latter impairment was rescued by administration of exogenous TGF-β1, suggesting that endogenously produced TGF-β1 plays a role in physiological mechanisms underlying LTP and memory. Finally, TGF-β1 functional effect correlates with an increased expression of the phosphorylated transcription factor cAMP-Responsive Element Binding protein.
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