From: Nerve growth factor and receptor expression in rheumatoid arthritis and spondyloarthritis
Patient Groups | Â | RT-PCR results | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
 |  | TrkA | p75 | trkB | trkC | NGF | BDNF | NT-3 | NT-4 |  |
SpA (n = 16) | median | 20 | 13.4 | 6.7 | 7.1 | 323 | 92 | 7.0 | 7.3 | Â |
 | SD | 12 | 7.7 | 3.9 | 6.0 | 296 | 113 | 2.9 | 5.0 |  |
 | (range) | (3.6 to 45) | (3.5 to 28) | (1.1 to 17) | (2.4 to 25) | (74 to 1225) | (71 to 444) | (1.3 to 9.6) | (1 to 15) |  |
RA (n = 9) | median | 16 | 25 | 7.7 | 11 | 418 | 163 | 7.5 | 10 | Â |
 | SD | 10 | 12 | 4.3 | 3.4 | 275 | 101 | 3.5 | 7 to 6 |  |
 | (range) | (8.9 to 40) | (2.3 to 41) | (4.1 to 18) | (4.3 to 14) | (267 to 1104) | (71 to 374) | (0.5 to 11) | (4.9 to 22) |  |
OA (n = 7) | median | 4.7 | 4.8 | 4.1 | 6.7 | 49 | 137 | 3.4 | 8.6 | Â |
 | SD | 4.2 | 3.7 | 2.8 | 3.8 | 37.7 | 98.5 | 2.2 | 3.1 |  |
 | (range) | (1.7 to 15) | (3.2 to 15) | (1.3 to 9.8) | (3.2 to 15) | (18 to 129) | (25 to 238) | (1.7 to 7.8) | (4.3 to 13) |  |