The effect of orientation of the tissue on photorelaxations.
| Number of UV Light Applications | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| Mucosal surface → UV | 4.2 ± 1.8 | 1.3 ± 0.8 | 0.4 ± 0.4 | 0.2 ± 0.2 | 0.2 ± 0.2 | 0.1 ± 0.1 | 0.1 ± 0.1 | 0 ± 0 | 0 ± 0 | 0 ± 0 |
| Adventitial surface → UV | 25.5 ± 3.5 | 10.6 ± 2.3 | 5.5 ± 1 | 3.4 ± 0.6 | 3.9 ± 0.7 | 2.3 ± 0.5 | 1.9 ± 0.4 | 1.2 ± 0.6 | 1.1 ± 0.7 | 1.1 ± 0.8 |
Two paired strips were prepared from the same tissue. Note the diminished photorelaxation when the mucosal surface of the tissue is toward the source of UV light. Photorelaxation was expressed as a percentage of KCl-induced tone (n = 8).