| First Author | Zhang D | Year | 2020 |
| Journal | Hum Genet | Volume | 139 |
| Issue | 4 | Pages | 545-555 |
| PubMed ID | 32020363 | Mgi Jnum | J:288324 |
| Mgi Id | MGI:6431165 | Doi | 10.1007/s00439-020-02123-9 |
| Citation | Zhang D, et al. (2020) Deficiency of SCAMP5 leads to pediatric epilepsy and dysregulation of neurotransmitter release in the brain. Hum Genet 139(4):545-555 |
| abstractText | Secretory carrier membrane proteins (SCAMPs) play an important role in exocytosis in animals, but the precise function of SCAMPs in human disease is unknown. In this study, we identified a homozygous mutation, SCAMP5 R91W, in a Chinese consanguineous family with pediatric epilepsy and juvenile Parkinson's disease. Scamp5 R91W mutant knock-in mice showed typical early-onset epilepsy similar to that in humans. Single-neuron electrophysiological recordings showed that the R91W mutation significantly increased the frequency of miniature excitatory postsynaptic currents (mEPSCs) at a resting state and also increased the amplitude of evoked EPSCs. The R91W mutation affected the interaction between SCAMP5 and synaptotagmin 1 and may affect the function of the SNARE complex, the machinery required for vesicular trafficking and neurotransmitter release. Our work shows that dysfunction of SCAMP5 shifted the excitation/inhibition balance of the neuronal network in the brain, and the deficiency of SCAMP5 leads to pediatric epilepsy. |
