Table 1.
WT kNBC1 | EGFP-WT-kNBC1 | S982A-kNBC1 | EGFP-S982A-kNBC1 | |||||
---|---|---|---|---|---|---|---|---|
[Na+]AP/[Na+]BL | Erev | n | Erev | n | Erev | n | Erev | n |
No treatment | ||||||||
10/50 | −20.1 ± 2(6) | 3.1 ± 0.3 | −19.4 ± 2(4) | 3.2 ± 0.3 | −18.6 ± 2(7) | 3.2 ± 0.3 | −19.4 ± 2(6) | 3.2 ± 0.3 |
50/10 | 23.2 ± 2(5) | 2.8 ± 0.3 | 21.5 ± 2(4) | 2.9 ± 0.3 | 19.1 ± 2(8) | 3.2 ± 0.3 | 20.3 ± 2(4) | 3.1 ± 0.3 |
8-Br-cAMP | ||||||||
10/50 | −38.2 ± 4(7)* | 2.1 ± 0.2* | −37.6 ± 4(6)* | 2.1 ± 0.2* | −22.4 ± 2(6) | 2.9 ± 0.3 | −21.3 ± 2(4) | 3.0 ± 0.3 |
50/10 | 37.5 ± 4(8)* | 2.1 ± 0.2* | 44.2 ± 4(5)* | 1.9 ± 0.2* | 18.6 ± 2(7) | 3.2 ± 0.3 | 23.1 ± 2(5) | 2.8 ± 0.3 |
H-89 + 8-Br-cAMP | ||||||||
10/50 | −23.7 ± 2(8) | 2.8 ± 0.3 | −22.6 ± 2(4) | 2.8 ± 0.3 | −18.8 ± 2(7) | 3.2 ± 0.3 | −20.4 ± 2(6) | 3.1 ± 0.3 |
50/10 | 22.4 ± 2(5) | 2.9 ± 0.3 | 24.1 ± 2(6) | 2.7 ± 0.3 | 22.9 ± 2(6) | 2.8 ± 0.3 | 23.5 ± 2(4) | 2.8 ± 0.3 |
H-85 + 8-Br-cAMP | ||||||||
10/50 | −35.2 ± 3(4)* | 2.2 ± 0.2* | −36.6 ± 2(4)* | 2.1 ± 0.2* | −24.1 ± 2(4) | 2.7 ± 0.3 | −21.6 ± 2(4) | 2.9 ± 0.3 |
50/10 | 37.4 ± 3(4)* | 2.1 ± 0.3* | 34.3 ± 2(4)* | 2.2 ± 0.2* | 23.2 ± 2(4) | 2.8 ± 0.3 | 22.5 ± 2(4) | 2.8 ± 0.3 |
[Na+]AP/[Na+]BL, apical/basolateral sodium gradient. Number of experiments is shown in parentheses.
P < 0.05 compared with the corresponding WT kNBC1 construct in untreated cells.