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Identification of New Biomarkers of Posturo-Locomotor Instability in a Rodent Model of Vestibular Pathology.
Frontiers in Neurology ( IF 2.7 ) Pub Date : 2020-05-29 , DOI: 10.3389/fneur.2020.00470
Emna Marouane 1, 2 , Guillaume Rastoldo 1 , Nada El Mahmoudi 1 , David Péricat 1 , Christian Chabbert 1 , Vincent Artzner 2 , Brahim Tighilet 1
Affiliation  

The vestibular system plays a crucial role in maintaining postural balance. Unilateral vestibular lesions result in a typical syndrome characterized by postural imbalance, altered locomotor patterns and gaze stabilization, as well as cognitive and neurovegetative disorders. One of the main difficulties encountered in the development of new anti-vertigo drugs is the lack of sensitivity in the evaluation of this syndrome. Qualitative assessments of the vestibular syndrome have been developed, but methods of conducting quantitative evaluations are critically lacking. Recently, assessments with a dynamic weight-bearing device (DWB®, Bioseb) revealed postural alterations in rats subjected to unilateral vestibular neurectomy (UVN). Our team is evaluating a new version of this device capable of quantifying additional parameters of postural and locomotor equilibrium. The objective of this study was to use this device to assess these new posturo-locomotor parameters in a rat model of a vestibular pathology. The biomarkers measured by this device are as follows: the barycenter, the support surface and the weight distribution of the rats when they were moving or stationary. Before UVN, the rats showed a symmetric distribution of their weight along the lateral axis. In the acute phase after UVN on the left side, the rats distributed more weight on the right side than on the left side and then distributed more weight on the left side. These results corroborate those presented in our previous study. The support surface of the rats increased between 1 day and 30 days after UVN, and the barycenter distribution reflected the weight distribution. In addition, our results show smaller changes in the weight distributions when the animals are moving compared with when they are stationary in the acute phase after UVN. This study provides new information on the static and dynamic postural balance patterns observed after unilateral vestibular loss in rats. These data are relevant because they objectively quantify the posturo-locomotor component of vestibular syndrome as well as the compensatory strategies used after vestibular loss. These results may guide the development of rehabilitation protocols for vestibular patients and the validation of pharmacological compounds favoring the restoration of equilibrium.

中文翻译:

啮齿动物前庭病理模型中新的运动后不稳定性的生物标志物的鉴定。

前庭系统在维持姿势平衡中起着至关重要的作用。单侧前庭病变导致典型的综合症,其特征是姿势不平衡,运动模式改变和注视稳定以及认知和神经营养障碍。在开发新的抗眩晕药中遇到的主要困难之一是对这种综合征的评估缺乏敏感性。已经开发了对前庭综合征的定性评估,但严重缺乏进行定量评估的方法。最近,使用动态负重装置(DWB®,Bioseb)进行的评估显示,接受单侧前庭神经切除术(UVN)的大鼠的体位改变。我们的团队正在评估该设备的新版本,该设备能够量化姿势和运动平衡的其他参数。这项研究的目的是使用这种设备来评估前庭病理大鼠模型中这些新的泌尿后运动参数。用该装置测量的生物标记物如下:大鼠运动或静止时的重心,支撑表面和体重分布。在进行UVN之前,大鼠的体重沿横轴呈对称分布。在左侧发生UVN后的急性期,大鼠在右侧的重量比左侧的重量更多,然后在左侧的重量更多。这些结果证实了我们先前研究中提出的结果。UVN后1天到30天之间,大鼠的支撑表面增加,重心分布反映了重量分布。此外,我们的研究结果表明,与在UVN后急性期静止不动的动物相比,运动时其体重分布的变化较小。这项研究提供了有关在大鼠单侧前庭丢失后观察到的静态和动态姿势平衡模式的新信息。这些数据是相关的,因为它们客观地量化了前庭综合征的泌尿后运动成分以及前庭丧失后使用的补偿策略。这些结果可能指导前庭患者康复方案的发展以及有助于恢复平衡的药理化合物的验证。我们的研究结果表明,与动物在UVN后急性期静止不动时相比,它们移动时体重分布的变化较小。这项研究提供了有关在大鼠单侧前庭丢失后观察到的静态和动态姿势平衡模式的新信息。这些数据是相关的,因为它们客观地量化了前庭综合征的泌尿后运动成分以及前庭丧失后使用的补偿策略。这些结果可能指导前庭患者康复方案的发展以及有助于恢复平衡的药理化合物的验证。我们的研究结果表明,与在UVN照射后急性阶段静止不动的动物相比,运动时体重的变化较小。这项研究提供了有关在大鼠单侧前庭丢失后观察到的静态和动态姿势平衡模式的新信息。这些数据是相关的,因为它们客观地量化了前庭综合征的泌尿后运动成分以及前庭丧失后使用的补偿策略。这些结果可能指导前庭患者康复方案的发展以及有助于恢复平衡的药理化合物的验证。这项研究提供了有关在大鼠单侧前庭丢失后观察到的静态和动态姿势平衡模式的新信息。这些数据是相关的,因为它们客观地量化了前庭综合征的泌尿后运动成分以及前庭丧失后使用的补偿策略。这些结果可能指导前庭患者康复方案的发展以及有助于恢复平衡的药理化合物的验证。这项研究提供了有关在大鼠单侧前庭丢失后观察到的静态和动态姿势平衡模式的新信息。这些数据是相关的,因为它们客观地量化了前庭综合征的泌尿后运动成分以及前庭丧失后使用的补偿策略。这些结果可能指导前庭患者康复方案的发展以及有助于恢复平衡的药理化合物的验证。
更新日期:2020-05-29
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