| Using the Parafilm-assisted Microdissection (PAM) Method to Sample Rodent Nucleus Accumbens
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Author:
Date:
2020-12-05
[Abstract] Microdissection techniques are very important for anatomical and functional studies focused on neuroscience, where it is often necessary microdissect specific brain areas to perform molecular or anatomical analyses. The parafilm®-assisted microdissection (PAM) was previously described and involves the microdissection of tissue sections mounted on parafilm-covered glass slides. In this work, we describe the use of the PAM method to microdissect rodent nucleus accumbens (NAc). (1) We first describe the best way to perform the mouse euthanasia and how to remove the brain. (2) Next, we describe how to prepare the slides with parafilm® that will be used to receive the brain slices. (3) Following, we describe how to handle the brain in the cryostat, how to align ...
[摘要] [摘要]显微解剖技术对于专注于神经科学的解剖学和功能研究非常重要,在显微学中,通常有必要对特定的大脑区域进行显微解剖以进行分子或解剖学分析。石蜡膜® -assisted显微切割(PAM)先前描述的,并且涉及安装在封口膜覆盖的载玻片上的组织切片的显微切割。在这项工作中,我们描述了使用PAM方法微分散啮齿动物伏隔核(NAc)。(1)我们首先描述执行小鼠安乐死的最佳方法以及如何去除大脑。(2)接下来,我们介绍如何用石蜡制作的幻灯片® 那将被用来接收大脑切片。(3)接下来,我们描述如何在低温恒温器中处理大脑,如何对齐半球以及如何识别NAc前后限。(4)我们还描述了如何对切片进行染色和脱水,这是促进显微切割和保存大分子的关键步骤。(5)在最后一步,我们描述了如何识别NAc的背腹和后内侧界限,以及最后如何进行该区域的手动显微解剖。这是一种低成本的技术,该技术允许研究者具体microdissect任何脑区域,从该完整的RNA和蛋白质可被提取为执行几个分子分析(例如。,实时PCR,西方印迹和RNA-SEQ)。
[背景]伏隔核(NAC)是位于纹状体的rostroventral部分基底节的一部分。具体而言,NAc是我们称为腹侧纹状体的结构的一部分,该结构也包含嗅觉结节。众所周知,NAc在多巴胺能中脑边缘途径中的作用,其调节动机行为并对情绪和情境行为负责(Baik,2013)。伏隔核已经被牵连的精神疾病(例如,抑郁症),药物成瘾,肥胖,慢性疼痛,这表明在研究这个大脑结构的神经生物学的相关性(内斯特勒和Carlezon,2006;沃尔科夫等,2011;沃尔科夫和Morales,2015;Brandão等,2019; ...
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| Headpost Surgery for in vivo Electrophysiological Recording in the Mouse Inferior Colliculus during Locomotion
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Author:
Date:
2020-12-05
[Abstract] The inferior colliculus (IC) is a critical midbrain integration center for auditory and non-auditory information. Although much is known about the response properties of the IC neurons to auditory stimuli, how the IC neural circuits function during movement such as locomotion remains poorly understood. Mice offer a valuable model in this respect, but previous studies of the mouse IC were performed in anesthetized or restrained preparations, making it difficult to study the IC function during behavior. Here we describe a neural recording protocol for the mouse IC in which mice are head-fixed, but can run on a passive treadmill. Mice first receive a headpost surgery, and become habituated to head-fixing while being on a treadmill. Following a few days of habituation, neural recordings of ...
[摘要] [摘要]下丘脑(IC)是听觉和非听觉信息的关键中脑整合中心。尽管对IC神经元对听觉刺激的响应特性了解很多,但对IC神经回路在运动(例如运动)过程中的功能仍知之甚少。小鼠在这方面提供了有价值的模型,但是先前对小鼠IC的研究是在麻醉或约束的制剂中进行的,因此很难研究行为过程中的IC功能。在这里,我们描述了一种用于鼠标IC的神经记录协议,其中鼠标固定在头上,但可以在无源跑步机上运行。小鼠首先收到头条手术,并在跑步机上习惯于固定头部。适应几天后,进行IC神经元活动的神经记录。可以在不同的行为条件下比较神经活动,例如静止不动或在跑步机上跑步。我们描述了如何克服因位置和上覆骨骼而引起的用于清醒IC记录的柱头手术的挑战。该协议允许研究行为小鼠的IC功能,同时允许精确的刺激控制和类似于麻醉制剂的记录方法的使用。
[背景]下丘脑(IC)是一个关键的中脑听觉融合中心,几乎所有提升输入的项目都指向该中心(Winer and Schreiner,2005)。该IC还接收非听觉输入,包括那些从体感区域,提示的听觉和非听觉信息(多模态的集成Gruters一个第二格罗,2012)。由于可用的遗传工具广泛,小鼠为阐明IC功能的细胞和电路级原理提供了重要模型(Ono等人,2017; Goyer等人,2019; Chen和Song,2019; Hoyt等人,2019)。等人,2019; ...
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