Exome Sequencing Implicates Impaired GABA Signaling and Neuronal Ion Transport in Trigeminal Neuralgia
oleh: Weilai Dong, Sheng Chih Jin, August Allocco, Xue Zeng, Amar H. Sheth, Shreyas Panchagnula, Annie Castonguay, Louis-Étienne Lorenzo, Barira Islam, Geneviève Brindle, Karine Bachand, Jamie Hu, Agata Sularz, Jonathan Gaillard, Jungmin Choi, Ashley Dunbar, Carol Nelson-Williams, Emre Kiziltug, Charuta Gavankar Furey, Sierra Conine, Phan Q. Duy, Adam J. Kundishora, Erin Loring, Boyang Li, Qiongshi Lu, Geyu Zhou, Wei Liu, Xinyue Li, Michael C. Sierant, Shrikant Mane, Christopher Castaldi, Francesc López-Giráldez, James R. Knight, Raymond F. Sekula, Jr., J. Marc Simard, Emad N. Eskandar, Christopher Gottschalk, Jennifer Moliterno, Murat Günel, Jason L. Gerrard, Sulayman Dib-Hajj, Stephen G. Waxman, Fred G. Barker, II, Seth L. Alper, Mohamed Chahine, Shozeb Haider, Yves De Koninck, Richard P. Lifton, Kristopher T. Kahle
| Format: | Article |
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| Diterbitkan: | Elsevier 2020-10-01 |
Deskripsi
Summary: Trigeminal neuralgia (TN) is a common, debilitating neuropathic face pain syndrome often resistant to therapy. The familial clustering of TN cases suggests that genetic factors play a role in disease pathogenesis. However, no unbiased, large-scale genomic study of TN has been performed to date. Analysis of 290 whole exome-sequenced TN probands, including 20 multiplex kindreds and 70 parent-offspring trios, revealed enrichment of rare, damaging variants in GABA receptor-binding genes in cases. Mice engineered with a TN-associated de novo mutation (p.Cys188Trp) in the GABAA receptor Cl− channel γ-1 subunit (GABRG1) exhibited trigeminal mechanical allodynia and face pain behavior. Other TN probands harbored rare damaging variants in Na+ and Ca+ channels, including a significant variant burden in the α-1H subunit of the voltage-gated Ca2+ channel Cav3.2 (CACNA1H). These results provide exome-level insight into TN and implicate genetically encoded impairment of GABA signaling and neuronal ion transport in TN pathogenesis.