. 2010 Sep 29;217(6):740–754. doi: 10.1111/j.1469-7580.2010.01304.x

Table 2.

Transepithelial resistance data before and after particle addition.

	Transepithelial resistance (Ω · cm²)

Treatment group	Raw data for Control/TER	Raw data for post-treatment/TER	Delta changes after pre-treatment	Raw data for post-particle/TER	Delta changes after particle exposure
Particle-only groups
Particle/only-5	451 ± 19	–	–	580 ± 25	134 ± 7^#
Particle/only-60	451 ± 19	–	–	484 ± 31	27 ± 12^P/O-5
24 h Caco-2/macrophage groups
Macrophage/particle-5	Control/TER subset	144 ± 12	−438 ± 31^#	213 ± 6	77 ± 6^†
Macrophage/particle-60	Control/TER subset	144 ± 12	−438 ± 31^#	206 ± 15	56 ± 4
24 h macrophage-conditioned medium groups
Macrophage-conditioned medium/particle-5	Control/TER subset	314 ± 31	−221 ± 41^#C/M	450 ± 41	125 ± 11^P/O-5,M/P-5
Macrophage-conditioned medium/particle-60	Control/TER subset	314 ± 31	−221 ± 41^#C/M	346 ± 53	43 ± 11
24 h untreated-medium groups
Untreated-medium/particle-5	Control/TER subset	566 ± 10	31 ± 10^M-CM	736 ± 15	174 ± 12^{†P/O-5,M-CM/P-5}
Untreated-medium/particle-60	Control/TER subset	566 ± 10	31 ± 10^M-CM	639 ± 20	68 ± 10^†

Mean transepithelial resistance (TER) values ± standard error of the mean (SEM) for n ≥ 21 samples are calculated from a minimum of two experiments. Pre-treatment delta changes (italics) in TER following treatments are calculated well by well as [pre-treatment/TER − mean control/TER from the same experiment]. Particle associated delta changes (italics) in TER between treatment and particle exposure are calculated well by well as [post-particle/TER − post-treatment/TER]. Statistical differences (P ≤ 0.05) for delta changes are illustrated as ‘^#’ a difference from control/TER, ‘^†’ from post-treatment/TER, ‘C/M’ from the Caco-2/macrophage effect, ‘P/O-5’, ‘M/P-5’ and ‘M-CM/P-5’ from particle/only-5, macrophage/particle-5 and macrophage-conditioned medium/particle-5 respectively.