TABLE 4.
Changes in cytokine mRNA expression by resting (control) and IFN-γ-and LPS-activated bovine macrophages (activated) and macrophages incubated with M. avium subsp. paratuberculosis (M. a. ptb) or M. avium subsp. avium (M. a. a.)a
| Cytokine | Treatment | Relative density
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 6 h
|
24 h
|
72 h
|
|||||||||||
| 1 | 2 | 3 | Change | 1 | 2 | 3 | Change | 1 | 2 | 3 | Change | ||
| IL-10 | Control | 612 | 960 | 1,104 | 632 | 1,117 | 894 | 448 | 493 | 524 | |||
| Activated | 2,206 | 2,507 | 3,879 | 3.2 | 2,074 | 2,547 | 2,173 | 2.5 | 482 | 575 | 669 | 1.2 | |
| M. a. ptb. | 6,900 | 9,905 | 11,638 | 12.2*† | 5,140 | 7,417 | 6,788 | 7.2*† | 3,710 | 3,803 | 4,552 | 8.3* | |
| M. a. a. | 2,287 | 4,227 | 4,968 | 4.2 | 2,004 | 4,219 | 3,158 | 3.5 | 3,110 | 3,551 | 3,183 | 6.7* | |
| IL-12 | Control | 0 | 0 | 0 | |||||||||
| Activated | 728 | 823 | 730 | 719 | 509 | 622 | 658 | 788 | 783 | ||||
| M. a. ptb. | 801 | 746 | 802 | 765 | 673 | 710 | 0* | ||||||
| M. a. a. | 608 | 302 | 364 | ND | 734 | 792 | 0* | ||||||
| INF-γ | Control | 144 | 296 | 241 | 168 | 183 | 206 | 87 | 0 | 72 | |||
| Activated | 1,232 | 1,607 | 1,379 | 6.2 | 446 | 398 | 375 | 2.2 | 102 | 100 | 54 | 1.5 | |
| M. a. ptb. | 378 | 482 | 403 | 1.9* | 342 | 361 | 451 | 2.0 | 174 | 199 | 207 | 3.5* | |
| M. a. a. | 447 | 452 | 386 | 1.9* | 189 | 178 | 321 | 1.2 | 163 | 203 | 154 | 3.1* | |
| TNF-α | Control | 56 | 154 | 59 | 57 | 42 | 78 | 40 | 62 | 87 | |||
| Activated | 358 | 266 | 272 | 3.4 | 181 | 238 | 326 | 4.2 | 109 | 79 | ND | 1.5 | |
| M. a. ptb. | 112 | 181 | 137 | 1.6*† | 184 | 132 | 218 | 3.0 | 45 | 66 | 74 | 0 | |
| M. a. a. | 338 | 313 | 348 | 3.8 | 192 | 229 | 239 | 3.8 | 0 | 152 | 45 | 0 | |
| IL-8 | Control | 178 | 40 | 35 | 136 | 41 | 59 | 298 | 184 | 196 | |||
| Activated | 2,013 | 358 | 395 | 11.0 | 1,769 | 845 | 928 | 14.9 | 296 | 251 | 225 | 1.1 | |
| M. a. ptb. | 2,243 | 679 | 787 | 14.7 | 2,245 | 1,712 | 1,678 | 24.0 | 1,317 | 662 | 681 | 4.0* | |
| M. a. a. | 1,841 | 752 | 722 | 13.1 | 1,723 | 1,421 | 1,503 | 19.8 | 982 | 878 | 851 | 4.0* | |
| GM-CSF | Control | 284 | 168 | 225 | 114 | 176 | 152 | 96 | 0 | 139 | |||
| Activated | 433 | 304 | 255 | 1.4 | 178 | 173 | 104 | 1.0 | 115 | 73 | 90 | 1.2 | |
| M. a. ptb. | 1,732 | 1,524 | 1,261 | 6.6* | 742 | 548 | 563 | 4.2* | 413 | 382 | 369 | 4.9*† | |
| M. a. a. | 1,802 | 1,330 | 2,342 | 8.1* | 659 | 621 | 679 | 4.5* | 158 | 177 | 172 | 2.1 | |
Values represent relative density for each of three cows (cows 1, 2, and 3). Change values represent mean fold change compared to the control. *, statistically significant (P < 0.05) compared to activated macrophages; †, statistically different (P < 0.05) compared to M. avium subsp. avium-infected macrophages. ND, not determined.