Figure 3: KOR antinociception varies with the X chromosome, not Y chromosome.
A) In the XY*model, baseline tail withdrawal latencies were not significantly between any of the genotypes, n=6-11. B) U50 antinociception (10mg/kg, s.c.) tended to be lower in animals with two X chromosomes compared to 1 X chromosome. The presence or absence of the Y chromosome (SRY) did not affect withdrawal thresholds, n=6-11. C) Tail withdrawal thresholds 20 minutes following U50 administration were transformed to percent maximum effect (%MPE), n=6-11. Data presented as mean +/− SEM. Data were compared with 2 or 3-way ANOVA, with time, X chromosome, and Y chromosome as independent factors.