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Article: The FGF14(F145S) mutation disrupts the interaction of FGF14 with voltage-gated Na+ channels and impairs neuronal excitability.

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Laezza F; Gerber BR; Lou JY; Kozel MA; Hartman H; Craig AM; Ornitz DM; Nerbonne JM
J. Neurosci., 2007


Table 1.

Voltage-gated Na+ currents in rat hippocampal neurons

Cells Peak density (pA/pF) V1/2 (act) (mV) kact (mV) V1/2 (inact) (mV) kinact (mV)
GFP −150 ± 15 (38) −27 ± 1 (22) 6.0 ± 0.3 (22) −60 ± 1 (27) 6.1 ± 0.2 (27)
FGF14 −242 ± 24 (17)* −33 ± 1 (13)** 3.6 ± 0.3 (13)*** −56 ± 1 (10)** 5.4 ± 0.2 (10)
FGF14F145S −61 ± 13 (29)*** −22 ± 2 (9)** 6.4 ± 0.3 (9) −66 ± 1 (9)** 8.0 ± 0.5 (9)***
  • All values are means ± SEM; numbers in parentheses are the numbers of cells analyzed. Values are significantly different from those determined in cells expressing GFP alone at the *p < 0.01, **p < 0.005, and ***p < 0.001 levels.


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