这项工作是由来自印第安纳州脊髓和脑损伤的研究资助（SCBI 200-12）提供资金支持，拉尔夫W.和格雷斯M.沙氏研究奖，美国印第安纳大学生物研究基金，美国国立卫生研究院资助RR025761和1R21NS072631-01A。

动物护理 男C57 BL / 6小鼠群养，并保持在一个12/12小时亮/暗周期，自由地获取食物和水随意 。在这个协议中使用的动物是10-12周龄。所有程序均在批准的印第安纳大学的动物护理和使用委员会的协议执行。 1，手术准备<ol><li>使用氯胺酮/甲苯​​噻嗪混合物（87.7毫克/毫升氯胺酮和12.3毫克/毫升甲苯噻嗪）麻醉小鼠，并通过腹腔注射给药（1毫升/千克）。 </li><li>剃两耳之间的小鼠头部。 </li><li>适用于石油基果冻到鼠标的眼睛，以防止在手术过程中变干。 </li><li>请用10％碘的剃光区域。然后用70％的酒精擦拭脱碘。 </li><li>用耳棒和导板固定鼠标头部立体定位框架。保证大脑是稳定的。 </li></ol> 2。骨瓣</P&gt; <ol><li>使头部用剪刀中间有纵形切口。用止血钳保持皮肤脱落的左侧。 </li><li>用棉签除去血液和组织中的骨，以暴露颅骨。允许暴露颅骨干燥1分钟。 </li><li>使用镊子施加压力，并确保该头骨保持不动。确定解剖标志LAMBDA（尾椎方面）和前囟门（正面的方面）。绘制在Lambda和前囟门的中心圆直径4mm和0.5 mm远离中线。 </li><li>使用钻孔沿标记的圆圈切割。轻轻地吹骨扬灰了。不要穿过骨完全钻，以免损坏硬脑膜。 </li><li>使用镊子去除骨暴露硬脑膜。 </li></ol> 3。嵌塞冲击系统包括控制箱设置影响的参数，一个致动器来执行嵌塞，和立体定位框架，以确保该行为uator和鼠标头的影响。 <ol><li>预先设定的致动器的速度，以6米/秒的手术前。 </li><li>预先设置不同的变形深度诱导不同的损伤严重性。为0.0-0.2毫米，0.5-1.0毫米，1.2-2.0毫米深的变形会导致轻度，中度，重度科技企业孵化器，分别为。该协议解释了如何通过使用3米/秒的速度实现了适度重型颅脑损伤1毫米变形深度。 </li><li>连接所述致动器在支架中的立体定位框架，并使用显微操作器移动它来固定致动器（直径3mm），在打开头骨区域的中心的圆的，平的端部。然后调节笔尖在平行于冲击部位的表面的角度。 </li><li>通过向下移动的扩展模型中执行器，直到笔尖接触撞击点的表面建立的零点。然后设置Z通道的立体定向控制面板零上。 </li><li>收回撞击尖同时移动驱动器下降1毫米。 </li><li>击中冲击按钮罢工的损伤部位，达到1毫米的变形深度。 </li></ol> 4，损伤部位封闭<ol><li>用棉签涂药，以消除任何血继的影响，但不碰损伤区域。 </li><li>放置在一个温暖的鼠标垫，以保持体温。 </li><li>一旦出血停止后，缝合关闭伤口。将动物放回笼子清洁并允许其从手术中恢复过夜的暖垫。 </li><li>管理丁丙诺啡0.05-0.10毫克/公斤SQ每天8-12小时的手术后2天。 </li></ol>

<ol>
	<li>Menon, D. K., Schwab, K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Position+statement:+definition+of+traumatic+brain+injury.">Position statement: definition of traumatic brain injury.</a> Arch Phys Med Rehabil. 91 (11), 1637-1640 (2010).</li><li>Lighthall, J. W., Dixon, C. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Experimental+models+of+brain+injury.">Experimental models of brain injury.</a> J Neurotrauma. 6 (2), 83-97 (1989).</li><li>Dixon, C. E., Clfton, G. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+controlled+cortical+impact+model+of+traumatic+brain+injury+in+the+rat.">A controlled cortical impact model of traumatic brain injury in the rat.</a> J Neurosci Methods. 39 (3), 253-262 (1991).</li><li>Scheff, S. W., Baldwin, S. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Morris+water+maze+deficits+in+rats+following+traumatic+brain+injury:+lateral+controlled+cortical+impact.">Morris water maze deficits in rats following traumatic brain injury: lateral controlled cortical impact.</a> J Neurotrauma. 14 (9), 615-627 (1997).</li><li>Smith, D. H., Soares, H. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+model+of+parasagittal+controlled+cortical+impact+in+the+mouse:+cognitive+and+histopathologic+effects.">A model of parasagittal controlled cortical impact in the mouse: cognitive and histopathologic effects.</a> J Neurotrauma. 12 (2), 169-178 (1995).</li><li>Hannay, H. J., Feldman, Z., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Validation+of+a+controlled+cortical+impact+model+of+head+injury+in+mice.">Validation of a controlled cortical impact model of head injury in mice.</a> J Neurotrauma. 16 (11), 1103-1114 (1999).</li><li>Natale, J. E., Ahmed, F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gene+expression+profile+changes+are+commonly+modulated+across+models+and+species+after+traumatic+brain+injury.">Gene expression profile changes are commonly modulated across models and species after traumatic brain injury.</a> J Neurotrauma. 20 (10), 907-927 (2003).</li><li>Anderson, R. W., Brown, C. J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Impact+mechanics+and+axonal+injury+in+a+sheep+model.">Impact mechanics and axonal injury in a sheep model.</a> J Neurotrauma. 20 (10), 961-974 (2003).</li><li>Lighthall, J. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Controlled+cortical+impact:+a+new+experimental+brain+injury+model.">Controlled cortical impact: a new experimental brain injury model.</a> J Neurotrauma. 5 (1), 1-15 (1988).</li><li>Chen, S., Pickard, J. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Time+course+of+cellular+pathology+after+controlled+cortical+impact+injury.">Time course of cellular pathology after controlled cortical impact injury.</a> Exp Neurol. 182 (1), 87-102 (2003).</li><li>Long, J. B., Bentley, T. 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K., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neutrophil+accumulation+after+traumatic+brain+injury+in+rats:+comparison+of+weight+drop+and+controlled+cortical+impact+models.">Neutrophil accumulation after traumatic brain injury in rats: comparison of weight drop and controlled cortical impact models.</a> J Neurotrauma. 11 (5), 499-506 (1994).</li><li>Werner, C., Engelhard, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pathophysiology+of+traumatic+brain+injury.">Pathophysiology of traumatic brain injury.</a> Br J Anaesth. 99 (1), 4-9 (2007).</li><li>Colicos, M. A., Dixon, C. E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Delayed,+selective+neuronal+death+following+experimental+cortical+impact+injury+in+rats:+possible+role+in+memory+deficits.">Delayed, selective neuronal death following experimental cortical impact injury in rats: possible role in memory deficits.</a> Brain Res. 739 (1-2), 111-119 (1996).</li><li>Raghavendra Rao, V. L., Dogan, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Traumatic+brain+injury+leads+to+increased+expression+of+peripheral-type+benzodiazepine+receptors,+neuronal+death,+and+activation+of+astrocytes+and+microglia+in+rat+thalamus.">Traumatic brain injury leads to increased expression of peripheral-type benzodiazepine receptors, neuronal death, and activation of astrocytes and microglia in rat thalamus.</a> Exp Neurol. 161 (1), 102-114 (2000).</li><li>Gao, X., Chen, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Moderate+traumatic+brain+injury+promotes+neural+precursor+proliferation+without+increasing+neurogenesis+in+the+adult+hippocampus.">Moderate traumatic brain injury promotes neural precursor proliferation without increasing neurogenesis in the adult hippocampus.</a> Exp Neurol. 239, 38-48 (2013).</li></ol>

The authors have nothing to disclose.

为成功地产生一致的孵化器的数量使用电子冲击磁体系统以引起CCI中最关键的步骤是：1）稳定地固定在鼠标头在立体定位框架; 2）产生的小鼠之间的骨窗的大小相同，没有骨瓣期间根据其损伤硬膜去除骨; 3）正确定位的影响，提示在开区的中心，影响之前确定的零点。 鼠标头必须固定在立体定位框架的影响之前非常紧密。内固定松动会产生大的变化伤害的水平。为了确保固?...

创伤性脑损伤（TBI）被定义为改变在脑功能，或其他证据脑病理学的，引起的外力1。科技企业孵化器仍然是一个严重的健康问题，在世界各地，特别是在美国。根据疾病控制中心和预防，至少170万科技企业孵化器，每年发生在美国造成的所有伤害相关的死亡的30.5％。 2000年，直接医疗费用和科技企业孵化器的间接成本总额估计为76.5十亿在美国孤单。尽管在过去几十年的技术和治疗的进步已经改善的生活质量和长度为那些从孵化器的数量的痛苦，没有有效的药物或预防性治疗目前存在。由于复杂性和科技企业孵化器，包括组织病变，细胞死亡和轴突变性广泛深远的影响，没有两个伤害是相同的;因此，对动物无电流TBI模型准确地再现TBI的各个方面所看到的人类。然而，动物模型并提供生产所需的调查TBI的目的是进一步了解科技企业孵化器的临床表现，希望不同的效果几乎相同的伤害的能力。 受控皮质冲击（CCI）模型使用了一个冲击系统提供物理冲击到动物的暴露硬脑膜。它诱导科技企业孵化器的范围从轻微到严重类似的经历的人。这种损伤是第一特征的白鼬2和后来被改编为在大鼠3,4，鼠标5-7，和羊8使用。由于第一特征，损伤部位已被放置两过中线2,9和外侧皮质10。 CCI提供了调查的影响和潜在的治疗科技企业孵化器的一个简单而准确的方法。 除了在CCI模型中，流体打击乐器和重量下降模型是共mmonly用于生产科技企业孵化器。然而，这些模型存在的局限性，包括更少的控制参数的伤害，产生不可见人的科技企业孵化器histopathalogical变化，意外死亡的小鼠3,5,10发病较多。冲击波模型也用于生产科技企业孵化器。虽然冲击波模式不会重现见过histopathalogical变化下的机械冲击，这种模式并准确地生成特别是军事人员11经历科技企业孵化器。该控制皮层的影响模型是很容易控制，由于精确控制变形参数，如时间，速度和冲击5的深度。这样的精度，使整个动物更可行的整组复制几乎相同的伤害。最重要的是，CCI再现科技企业孵化器与出现在人类的科技企业孵化器12的功能。然而，没有一个单一的动物模型是在病理性重现陈的完整光谱完全成功GES脑外伤后观察。进一步的研究是必要的，以充分揭示脑外伤后发生的急性和慢性的变化。 两种类型的伤害发生下列脑外伤：主要和次要受伤。原发性损伤发生在撞击时刻，而不是治疗性的治疗敏感;然而，在初始损伤后持续存在二次伤害受治疗13。该控制皮层的影响模型产生的原发性损伤，从而使研究人员调查TBI的影响和潜在的治疗治疗继发性损伤的潜在的长期影响。使用CCI模型潜在的研究领域包括神经元死亡，脑水肿，神经，血管的影响，histopathalogical变化，记忆障碍，更3,13-16。

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			<td style="width:171px;">Henry Schein</td>
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			<td>Making 2.5% Avertin</td>
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controlled cortical impact model for traumatic brain injury

Every year over a million Americans suffer a traumatic brain injury (TBI). Combined with the incidence of TBIs worldwide, the physical, emotional, social, and economical effects are staggering. Therefore, further research into the effects of TBI and effective treatments is necessary. The controlled cortical impact (CCI) model induces traumatic brain injuries ranging from mild to severe. This method uses a rigid impactor to deliver mechanical energy to an intact dura exposed following a craniectomy. Impact is made under precise parameters at a set velocity to achieve a pre-determined deformation depth. Although other TBI models, such as weight drop and fluid percussion, exist, CCI is more accurate, easier to control, and most importantly, produces traumatic brain injuries similar to those seen in humans. However, no TBI model is currently able to reproduce pathological changes identical to those seen in human patients. The CCI model allows investigation into the short-term and long-term effects of TBI, such as neuronal death, memory deficits, and cerebral edema, as well as potential therapeutic treatments for TBI.

该控制皮层的影响模型产生科技企业孵化器范围的严重程度从轻微到严重。撞击后颅肿胀的量，出血，并在冲击地点颅失真将揭示从速度和变形深度参数造成的损伤程度。温和的科技企业孵化器导致颅肿胀在撞击地点和轻微出血，由于有限的硬脑膜违约。适度表现出脑外伤颅内肿胀，出血增多，由于硬脑膜违反嵌塞后（ 图1）。中度和重度TBI之间的差别可能是难以区分，直到上观察用...

Watch this Scientific Journal Video about Controlled Cortical Impact Model for Traumatic Brain Injury at JoVE.com

Controlled Cortical Impact Model for Traumatic Brain Injury

Traumatic brain injuries (TBIs) remain a serious health problem. Using the controlled cortical impact surgery model, research on the effects of TBI and possible treatment methods may be performed.

控制皮层影响模型创伤性脑损伤

Every year over a million Americans suffer a traumatic brain injury (TBI).  Combined with the incidence of TBIs worldwide, the physical, emotional, ...

controlled-cortical-impact-model-for-traumatic-brain-injury

Research

JoVE Journal

Medicine

28.4K 次观看.  Indiana University School of Medicine. Traumatic brain injuries (TBIs) remain a serious health problem. Using the controlled cortical impact surgery model, research on the effects of TBI and possible treatment methods may be performed.

视频: Controlled Cortical Impact Model for Traumatic Brain Injury

Pressure Controlled Ventilation to Induce Acute Lung Injury in Mice

Murine models are extensively used to investigate acute injuries of different organs systems (1-34). Acute lung injury (ALI), which occurs with prolonged mechanical ventilation, contributes to morbidity and mortality of critical illness, and studies on novel genetic or pharmacological targets are areas of intense investigation (1-3, 5, 8, 26, 30, 33-36). ALI is defined by the acute onset of the disease, which leads to non-cardiac pulmonary edema and subsequent impairment of pulmonary gas exchange (36). We have developed a murine model of ALI by using a pressure-controlled ventilation to induce ventilator-induced lung injury (2). For this purpose, C57BL/6 mice are anesthetized and a tracheotomy is performed followed by induction of ALI via mechanical ventilation. Mice are ventilated in a pressure-controlled setting with an inspiratory peak pressure of 45 mbar over 1 - 3 hours. As outcome parameters, pulmonary edema (wet-to-dry ratio), bronchoalveolar fluid albumin content, bronchoalveolar fluid and pulmonary tissue myeloperoxidase content and pulmonary gas exchange are assessed (2). Using this technique we could show that it sufficiently induces acute lung inflammation and can distinguish between different treatment groups or genotypes (1-3, 5). Therefore this technique may be helpful for researchers who pursue molecular mechanisms involved in ALI using a genetic approach in mice with gene-targeted deletion.

A murine model for ventilator induced lung injury is an important tool to study an acute lung injury in vivo. Here, we report an easy applicable in situ model for acute lung injury using high-pressure mechanical ventilation to induce acute failure of the lung.

压力控制通气诱导小鼠急性肺损伤

Murine models are extensively used to investigate acute injuries of different organs systems (1-34). Acute lung injury (ALI), which occurs with prolonged ...

科研

医学

Controlled Cervical Laceration Injury in Mice

Use of genetically modified mice enhances our understanding of molecular mechanisms underlying several neurological disorders such as a spinal cord injury (SCI). Freehand manual control used to produce a laceration model of SCI creates inconsistent injuries often associated with a crush or contusion component and, therefore, a novel technique was developed. Our model of cervical laceration SCI has resolved inherent difficulties with the freehand method by incorporating 1) cervical vertebral stabilization by vertebral facet fixation, 2) enhanced spinal cord exposure, and 3) creation of a reproducible laceration of the spinal cord using an oscillating blade with an accuracy of &plusmn;0.01 mm in depth without associated contusion. Compared to the standard methods of creating a SCI laceration such as freehand use of a scalpel or scissors, our method has produced a consistent lesion. This method is useful for studies on axonal regeneration of corticospinal, rubrospinal, and dorsal ascending tracts.

A novel technique to create a reproducible in vivo model of cervical spinal cord laceration injury in the mouse is described. This technique is based on spine stabilization by fixation of the cervical facets and laceration of the spinal cord using an oscillating blade with an accuracy of &plusmn;0.01 mm.

控制宫颈裂伤损伤小鼠

Use of genetically modified mice enhances our  understanding of molecular mechanisms underlying several neurological disorders  such as a spinal cord ...

Stretch in Brain Microvascular Endothelial Cells (cEND) as an In Vitro Traumatic Brain Injury Model of the Blood Brain Barrier

Due to the high mortality incident brought about by traumatic brain injury (TBI), methods that would enable one to better understand the underlying mechanisms involved in it are useful for treatment. There are both in vivo and in vitro methods available for this purpose. In vivo models can mimic actual head injury as it occurs during TBI. However, in vivo techniques may not be exploited for studies at the cell physiology level. Hence, in vitro methods are more advantageous for this purpose since they provide easier access to the cells and the extracellular environment for manipulation.
Our protocol presents an in vitro model of TBI using stretch injury in brain microvascular endothelial cells. It utilizes pressure applied to the cells cultured in flexible-bottomed wells. The pressure applied may easily be controlled and can produce injury that ranges from low to severe. The murine brain microvascular endothelial cells (cEND) generated in our laboratory is a well-suited model for the blood brain barrier (BBB) thus providing an advantage to other systems that employ a similar technique. In addition, due to the simplicity of the method, experimental set-ups are easily duplicated. Thus, this model can be used in studying the cellular and molecular mechanisms involved in TBI at the BBB.

Stretch in Brain Microvascular Endothelial Cells cEND as an In Vitro Traumatic Brain Injury Model of the Blood Brain Barrier

In vitro traumatic brain injury models are being developed to reproduce in vivo brain deformation. Stretch-induced injury has been employed for astrocytes, neurons, glial cells, aortic, and brain endothelial cells. However, our system uses a blood brain barrier (BBB) model that possesses properties constituting a legitimate model of the BBB to establish an in vitro&#160;TBI model.

作为脑微血管内皮细胞（CEND）的伸展<em&gt;体外</em创伤性脑损伤模型血脑屏障

Due to the high mortality incident brought about by traumatic brain injury (TBI), methods that would enable one to better understand the underlying ...

Renal Ischaemia Reperfusion Injury: A Mouse Model of Injury and Regeneration

Renal ischaemia reperfusion injury (IRI) is a common cause of acute kidney injury (AKI) in patients and occlusion of renal blood flow is unavoidable during renal transplantation. Experimental models that accurately and reproducibly recapitulate renal IRI are crucial in dissecting the pathophysiology of AKI and the development of novel therapeutic agents. Presented here is a mouse model of renal IRI that results in reproducible AKI. This is achieved by a midline laparotomy approach for the surgery with one incision allowing both a right nephrectomy that provides control tissue and clamping of the left renal pedicle to induce ischaemia of the left kidney. By careful monitoring of the clamp position and body temperature during the period of ischaemia this model achieves reproducible functional and structural injury. Mice sacrificed 24 hr&#160;following surgery demonstrate loss of renal function with elevation of the serum or plasma creatinine level as well as structural kidney damage with acute tubular necrosis evident. Renal function improves and the acute tissue injury resolves during the course of 7 days following renal IRI such that this model may be used to study renal regeneration. This model of renal IRI has been utilized to study the molecular and cellular pathophysiology of AKI as well as analysis of the subsequent renal regeneration.

The mouse model of renal ischaemia reperfusion injury described here comprises of a right nephrectomy that provides control tissue and clamping of the left renal pedicle to induce ischaemia that results in acute kidney injury. This model uses a midline laparotomy approach with all steps performed via one incision.

肾缺血再灌注损伤：损伤的小鼠模型和再生

Renal ischaemia reperfusion injury (IRI) is a common cause of acute kidney injury (AKI) in patients and occlusion of renal blood flow is unavoidable ...

A Novel Model of Mild Traumatic Brain Injury for Juvenile Rats

Despite growing evidence that childhood represents a major risk period for mild traumatic brain injury (mTBI) from sports-related concussions, motor vehicle accidents, and falls, a reliable animal model of mTBI had previously not been developed for this important aspect of development. The modified weight-drop technique employs a glancing impact to the head of a freely moving rodent transmitting acceleration, deceleration, and rotational forces upon the brain. When applied to juvenile rats, this modified weight-drop technique induced clinically relevant behavioural outcomes that were representative of post-concussion symptomology. The technique is a rapidly applied procedure with an extremely low mortality rate, rendering it ideal for high-throughput studies of therapeutics. In addition, because the procedure involves a mild injury to a closed head, it can easily be used for studies of repetitive brain injury. Owing to the simplistic nature of this technique, and the clinically relevant biomechanics of the injury pathophysiology, the modified weight-drop technique provides researchers with a reliable model of mTBI that can be used in a wide variety of behavioural, molecular, and genetic studies.

The modified weight-drop technique is an easy, cost-effective procedure used for the induction of mild traumatic brain injury in juvenile rats. This novel technique produces clinically relevant symptomology that will advance the study of mild traumatic brain injury (mTBI) and concussion.

轻度脑外伤的幼年大鼠一种新模式

Despite growing evidence that childhood represents a major risk period for mild traumatic brain injury (mTBI) from sports-related concussions, motor ...

Calibrated Forceps Model of Spinal Cord Compression Injury

Compression injuries of the murine spinal cord are valuable animal models for the study of spinal cord injury (SCI) and spinal regenerative therapy. The calibrated forceps model of compression injury is a convenient, low cost, and very reproducible animal model for SCI. We used a pair of modified forceps in accordance with the method published by Plemel et al. (2008) to laterally compress the spinal cord to a distance of 0.35 mm. In this video, we will demonstrate a dorsal laminectomy to expose the spinal cord, followed by compression of the spinal cord with the modified forceps. In the video, we will also address issues related to the care of paraplegic laboratory animals. This injury model produces mice that exhibit impairment in sensation, as well as impaired hindlimb locomotor function. Furthermore, this method of injury produces consistent aberrations in the pathology of the SCI, as determined by immunohistochemical methods. After watching this video, viewers should be able to determine the necessary supplies and methods for producing SCI of various severities in the mouse for studies on SCI and/or treatments designed to mitigate impairment after injury.

Spinal cord injury models should be highly reproducible. We demonstrate that the calibrated forceps compression model of spinal cord injury is an easy to use surgical method for generating reproducible injuries to the murine spinal cord.

脊髓压迫损伤的校准钳型

Compression injuries of the murine spinal cord are valuable animal models for the study of spinal cord injury (SCI) and spinal regenerative therapy. The ...

A Tissue Displacement-based Contusive Spinal Cord Injury Model in Mice

Producing a consistent and reproducible contusive spinal cord injury (SCI) is critical to minimizing behavioral and histological variabilities between experimental animals. Several contusive SCI models have been developed to produce injuries using different mechanisms. The severity of the SCI is based on the height that a given weight is dropped, the injury force, or the spinal cord displacement. In the current study, we introduce a novel mouse contusive SCI device, the Louisville Injury System Apparatus (LISA) impactor, which can create a displacement-based SCI with high injury velocity and accuracy. This system utilizes laser distance sensors combined with advanced software to produce graded and highly-reproducible injuries. We performed a contusive SCI at the 10th thoracic vertebral (T10) level in mice to demonstrate the step-by-step procedure. The model can also be applied to the cervical and lumbar spinal levels.

We introduce a tissue displacement-based contusive spinal cord injury model that can produce a consistent contusive spinal cord injury in adult mice.

基于组织位移的小鼠脊髓损伤模型

Producing a consistent and reproducible contusive spinal cord injury (SCI) is critical to minimizing behavioral and histological variabilities between ...

A Mouse Model of Single and Repetitive Mild Traumatic Brain Injury

Mild Traumatic Brain Injury (mTBI) can result in the acute loss of brain function, including a period of confusion, a loss of consciousness (LOC), focal neurological deficits and even amnesia. Athletes participating in contact sports are at high risk of exposure to large number of mTBIs. In terms of the level of injury in a sporting athlete, a mTBI is defined as a mild injury that does not cause gross pathological changes, but does cause short-term neurological deficits that are spontaneously resolved. Despite previous attempts to model mTBI in mice and rats, many have reported gross adverse effects including skull fractures, intracerebral bleeding, axonal injury and neuronal cell death. Herein, we describe our highly reproducible animal model of mTBI that reproduces clinically relevant symptoms. This model uses a custom made pneumatic impactor device to deliver a closed-head trauma. This impact is made under precise velocity and deformation parameters, creating a reliable and reproducible model to examine the mechanisms that contribute to effects of single or repetitive concussive mTBI.

Athletes absorb several hundred mild traumatic brain injuries (mTBI)/concussions every year; however, the consequence of these on the brain is poorly understood. Therefore, an animal model of single and repetitive mTBI that consistently replicates clinically relevant symptoms provides the means to advance the study of mTBI and concussion.

单一和重复轻度创伤性脑损伤的小鼠模型

Mild Traumatic Brain Injury (mTBI) can result in the acute loss of brain function, including a period of confusion, a loss of consciousness (LOC), focal ...

Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury

Patients with severe traumatic brain injury (sTBI) have difficulty knowing whether they are accurately expressing their thoughts and emotions because of disorders of consciousness, disrupted higher brain function, and verbal disturbances. As a consequence of an insufficient ability to communicate, objective evaluations are needed from family members, medical staff, and caregivers. One such evaluation is the assessment of functioning brain areas. Recently, multimodal brain imaging has been used to explore the function of damaged brain areas. [18F]-fluorodeoxyglucose positron emission tomography-computed tomography ([18F]FDG-PET/CT) is a successful tool for examining brain function. However, the assessment of brain glucose metabolism based on [18F]FDG-PET/CT is not standardized and depends on several varying parameters, as well as the patient&#39;s condition. Here, we describe a series of semiquantitative assessment protocols for a region-of-interest (ROI) image analysis using self-produced [18F]FDG tracers in patients with sTBI. The protocol focuses on screening the participants, preparing the [18F]FDG tracer in the hot lab, scheduling the acquisition of [18F]FDG-PET/CT brain images, and measuring glucose metabolism using the ROI analysis from a targeted brain area.

Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury

[18F]-fluorodeoxyglucose (FDG) positron emission tomography-computed tomography is useful for studying glucose metabolism related to brain function. Here, we present a protocol for an [18F]FDG tracer set-up and semiquantitative assessment of the region-of-interest analysis for targeted brain areas associated with clinical manifestations in patients with severe traumatic brain injury.

[18f] fdg 示踪剂在重型颅脑损伤患者中的半定量评价

Patients with severe traumatic brain injury (sTBI) have difficulty knowing whether they are accurately expressing their thoughts and emotions because of ...

Tracking Superparamagnetic Iron Oxide-labeled Mesenchymal Stem Cells using MRI after Intranasal Delivery in a Traumatic Brain Injury Murine Model

Stem cell-based therapies for brain injuries, such as traumatic brain injury (TBI), are a promising approach for clinical trials. However, technical hurdles such as invasive cell delivery and tracking with low transplantation efficiency remain challenges in translational stem-based therapy. This article describes an emerging technique for stem cell labeling and tracking based on the labeling of the mesenchymal stem cells (MSCs) with superparamagnetic iron oxide (SPIO)&#160;nanoparticles, as well as intranasal delivery of the labeled MSCs. These nanoparticles are fluorescein isothiocyanate (FITC)-embedded and safe to label the MSCs, which are subsequently delivered to the brains of TBI-induced mice by the intranasal route. They are then tracked non-invasively in vivo by real-time magnetic resonance imaging (MRI). Important advantages of this technique that combines SPIO for cell labeling and intranasal delivery include (1) non-invasive, in vivo MSC tracking after delivery for long tracking periods, (2) the possibility of multiple dosing regimens due to the non-invasive route of MSC delivery, and (3) possible applications to humans, owing to the safety of SPIO, non-invasive nature of the cell-tracking method by MRI, and route of administration.

Presented here is a protocol for non-invasive mesenchymal stem cell (MSC) delivery and tracking in a mouse model of traumatic brain injury. Superparamagnetic iron oxide&#160;nanoparticles are employed as a magnetic resonance imaging (MRI) probe for MSC labeling and non-invasive in vivo tracking following intranasal delivery using real-time MRI.

跟踪超副磁性氧化铁标记的美感血干细胞使用MRI后，创伤性脑损伤Murine模型内伤分娩

Stem cell-based therapies for brain injuries, such as traumatic brain injury (TBI), are a promising approach for clinical trials. However, technical ...