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Table 1 Comparison of TER measurements using the Chopstick vs Endohm techniques

From: Comparison of transepithelial resistance measurement techniques: Chopsticks vs. Endohm

Cell Line

Chopstick

TER (\( \overset{-}{x} \) ± SEM Ω x cm2)

Endohm

TER (\( \overset{-}{x} \) ± SEM Ω x cm2)

Substrate

PC

PET

PC

PET

MCF-7 (n = 16)

402 ± 28a*

424 ± 12b*

435 ± 31a*

462 ± 16b*

MDCK (n = 5)

7049 ± 355c**

5280 ± 352d**

8055 ± 263c**

6431 ± 361d**

MDA-MB-157 (n = 7)

7 ± 1

13 ± 4

1 ± 0.5

6 ± 0.2

  1. Values represent means ± standard error of the mean. Levels of significance were tested separately for each of the cell lines using a paired t-test. a p ≤ 0.01 when comparing MCF-7’s TER values using PC insert but different techniques. b p ≤ 0.02 when comparing MCF-7’s TER values using PET insert but different techniques. * No significant difference between peak TER values obtained when MCF-7 ells were seeded on PC versus PET inserts using the same approach (p ≥ 0.4 for both Chopstick and Endohm). c p = 0.04 when comparing MDCK’s TER values using PC insert but different techniques; d p = 0.0003 MDCK’s TER values level of significance when comparing different techniques using PET insert. **Statistically significant differences when comparing MDCK’s peak TER values obtained with PC versus PET inserts using the same approach (Chopstick p = 0.009 and Endohm p = 0.002). No statistical analysis was done for MDA-MB-157 cells as they did not form functional TJs