慢性疼痛的病因依据是大脑和背部根腺细胞类型的遗传变异
Sylvanus Toikumo1,2, Marc Parisien3,4,5, Michael J Leone6,7
1Mental Illness Research, Education and Clinical Center, Crescenz VAMC, Philadelphia, PA 19104, USA.
medRxiv : the preprint server for health sciences
|July 9, 2025
概括
慢性疼痛遗传与特定的大脑和神经细胞类型有关. 这项研究将与疼痛相关的遗传变异映射到谷氨酸性神经元和其他细胞亚型中,揭示了关键的生物通路.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 疼痛研究 疼痛研究
背景情况:
- 慢性疼痛是一种复杂的疾病,基因不清楚.
- 全基因组关联研究 (GWAS) 已经确定了许多慢性疼痛的风险位置.
- 与这些遗传风险因素相关的特定细胞类型和组织在很大程度上是未知的.
研究的目的:
- 将大型GWAS数据与单细胞测序数据集成,以确定慢性疼痛的细胞类型特定遗传关联.
- 确定中枢和外围神经系统中特定的神经元和非神经元细胞类型,这些神经元具有与慢性疼痛相关的遗传变异.
- 阐明这些细胞类型特异性遗传发现所涉及的生物途径和分子功能.
主要方法:
- 综合GWAS数据 (N = 1,235,695) 用单细胞RNA测序 (scRNA-seq) 和单细胞染色质可访问性数据来治疗慢性疼痛.
- 分析了来自人类大脑和背部根腺 (hDRG) 的scRNA-seq数据.
- 利用来自人类大脑和小鼠背角的单细胞染色质可访问性数据.
主要成果:
- 与疼痛相关的变体在大脑 (前额叶皮质,海马体,杏仁体) 中的谷氨酸性神经元和hDRG中的特定神经元亚型 (hPEP.TRPV1/A1.2) 中显著丰富.
- 染色体的可访问性揭示了新皮层神经元 (大脑) 和中腹神经元以及寡干细胞前体细胞 (老鼠背角) 的变异性丰富.
- 基因级遗传性分析突出了诸如激酶活性,GABAergic突触和大脑中的轴突引导以及hDRG中的谷氨酸信号传递等途径. 在慢性疼痛患者样本中,EFNB2,GABBR1,NCAM1和SCN11A等特定基因被丰富.
结论:
- 慢性疼痛在中枢神经系统和外围神经系统的电路中表现出细胞类型特定的遗传结构.
- 这些发现确定了特定的神经元亚型和参与慢性疼痛易感性的分子途径.
- 这为开发有针对性的翻译研究和慢性疼痛治疗方法提供了基础.
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