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Table 1 Hepatic DT-diaphorase, EROD and catalase activities in rainbow trout exposed to benzo(a)pyrene (B(a)P), β-naphthoflavone (β-NF), naphthazarin (DHNQ), menadione (MN), or paraquat (PQ), for 2 and 5 days.

From: Effects of redox cycling compounds on DT diaphorase activity in the liver of rainbow trout (Oncorhynchus mykiss)

  Dose (mg Kg-1) DT-diaphorase nmol/(min × mg protein) EROD pmol/(min × mg protein) Catalase mmol/(min × mg protein)
   2 days 5 days 2 days 5 days 2 days 5 days
B(a)P 0 49.7 (9.4) 51.4 (20.3) 7.7 (3.7) 4.9 (1.5) 278 (52) 327 (33)
  5 58.3 (12.6) 59.4 (11.1) 159.3 (76.1)a 237.6 (146)a 334 (128) 398 (126)
  15 38.8 (16.1) 74.4 (15.8)ab 323.4 (280)a 491.8 (220)a 376 (96) 357 (114)
β-NF 0 50.5 (11.9) 54.0 (9.0) 8.5 (3.3) 7.7 (6.7) 297 (86) 247 (69)
  5 69.2 (16.3) 77.4 (19.8) 896.5 (156)a 943.3 (327)a 268 (93) 182 (75)
  15 72.1 (28.1) 101.7 (42.1)a 832.5 (399)a 877.3 (340)a 334 (131) 226 (95)
DHNQ 0 38.2 (5.3) 30.2 (7.6) 5.1 (3.2) 3.2 (1.8) 256 (103) 261 (171)
  1 45.3 (14.6) 40.4 (5.7)a 3.6 (1.9) 4.0 (3.9) 360 (132) 311 (152)
  3 41.7 (8.7) 48.3 (8.0)a 3.2 (1.6) 0.8 (0.5)ab 261 (69) 320 (64)
MN 0 40.7 (3.4) 47.0 (7.6) 7.3 (8.8) 10.0 (7.4) 144 (65) 204 (97)
  5 54.0 (9.4)a 65.0 (13.2)a n.m. 6.6 (6.2) 136 (37) 215 (47)b
  15 35.7 (6.7) 51.8 (6.4) 5.5 (2.1) 5.2 (2.5) 127 (38) 158 (65)
PQ 0 47.2 (11.7) 46.9 (7.6) 5.5 (3.9) 2.2 (1.1) 245 (73) 248 (97)
  3 53.0 (8.3) 71.0 (6.0)a 4.3 (2.4) 1.4 (0.8)b 229 (47) 348 (55)ab
  10 43.7 (6.0) 61.8 (20.4)a 3.9 (1.1) 2.7 (1.3) 155 (23)a 171 (37)a
  1. Note: Values (n = 7) are presented as: mean (standard deviation); n.m. = not measured. aSignificantly different from control – p < 0.05; bSignificantly different from day 2 – p < 0.05.