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Article: Functional role of the fast transient outward K+ current IA in pyramidal neurons in (rat) primary visual cortex.

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Yuan W; Burkhalter A; Nerbonne JM
J. Neurosci., 2005


Table 1.

Outward Kv currents in EGFP- and Kv4.2DN plus EGFP-expressing cortical neurons a

EGFP Kv4.2DN plus EGFP Kv2.1DN plus EGFP
Peak (pA/pF) 132 ± 13 120 ± 23 90 ± 10* 99 ± 10
IA (pA/pF) 50 ± 4 48 ± 4
IA τdecay (ms) 67 ± 9 59 ± 8
ID (pA/pF) 25 ± 3 46 ± 14 28 ± 4 18 ± 3
ID τdecay (ms) 553 ± 81 538 ± 69 516 ± 76 540 ± 53
IK (pA/pF) 36 ± 4 44 ± 4 38 ± 4 20 ± 3**
IK τdecay (ms) 2994 ± 213 1762 ± 222 2529 ± 259 3026 ± 270
Iss (pA/pF) 23 ± 2 30 ± 9 25 ± 2 16 ± 3
n 21 5 25 15
  • *Peak current densities are significantly (p < 0.01) lower in Kv4.2DN plus EGFP-expressing cells than in cells expressing EGFP alone. **The value is significantly (p < 0.01) lower in Kv2.1DN plus EGFP-expressing cells than in EGFP- or Kv4.2DN plus EGFP-expressing cells.

  • a All values are means ± SEM; current densities were determined at +60 mV (holding potential, −70 mV); n = number of cells.


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