Anesthesiology:H2O2通过瞬时受体电位锚蛋白1受体诱导肌肉的伤害感受

2017-11-15 陆凯 “罂粟花”微信号

H2O2在皮肤创伤中有各种各样的表现,但在深层肌肉组织中很少被研究。基于在足底的伤口后对瞬态受体电位锚蛋白1拮抗剂的反应,我们假设H2O2的作用是通过瞬态受体电位锚蛋白1在肌肉中产生伤害感受。

背景:H2O2在皮肤创伤中有各种各样的表现,但在深层肌肉组织中很少被研究。基于在足底的伤口后对瞬态受体电位锚蛋白1拮抗剂的反应,我们假设H2O2的作用是通过瞬态受体电位锚蛋白1在肌肉中产生伤害感受。

方  法:对大鼠(n=269)和小白鼠(n=16)的伤害性行为进行评估。不同的浓度和量的H2O2被注入到腓肠肌或皮下组织中。评估了H2O2对26只大鼠和6只小鼠体内脊髓背角神经活动和腰背神经根神经节的影响。

结  果:肌内(mean ± SD: 1,436 ± 513 s)比皮下(40 ± 58 s)注入H2O2(100 mM, 0.6 ml) 增加了疼痛的时间。在肌内注入H2O2后(–143 ± 81 s)相对皮下注射(–2 ± 111 s)位置厌恶反应是明显的。这些H2O2诱导的行为被瞬时受体电位锚蛋白1拮抗剂阻断。 肌内注射H2O2引起了体内脊髓背角神经元的持续活动,H2O2激活了背根神经节神经元的一个亚群。在肌注H2O2后,辣椒素神经阻滞减少了足底切口的保护,减少了伤害性时间。肌注H2O2后在瞬时受体电位锚蛋白1基因敲除小鼠与野生型小鼠相比(931±629 s)疼痛时间短(173±156 s)。

结  论:肌肉组织对H2O2的更大的反应可能有助于解释为什么不单是皮肤上的切口,而是包括深肌肉的切口在伤害性感受中也会产生自发性的活动。

原始出处:

Sugiyama D,et al.,Hydrogen Peroxide Induces Muscle Nociception via Transient Receptor Potential Ankyrin 1 Receptors.Anesthesiology. 2017 Oct;127(4):695-708.

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    2018-05-08 hb2008ye
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    2017-11-17 skhzy