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In the paper of Lund et al. (2002), the second author's name (Dr Y. Ge) was ommitted from the title page. Also, the key in Fig. 4 and related legend in were incorrect. Finally, in Fig. 5, the SEM values were incorrect. It should be pointed out that the errors in Figs 4 and 5 did not in any way influence the statistical analysis or conclusions drawn.

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Figure 4. Effects of intra-PAG oxytocin (1 nmol) -induced increases of hindpaw withdrawal latencies (HWLs) followed 5 min later by intra-PAG injections of unselective opioid receptor antagonist, naloxone in the dosages of 0. 1, 1 or 20 nmol (n = 8 per group). In another group, rats received intra-PAG administration of 0.9% saline, followed 5 min later by 20 nmol of naloxone (n = 8). Changes in HWL in response to thermal stimulation in the hotplate test (A) and to mechanical stimulation in the Randall Selitto test (B). Values are expressed as means ± SEM.

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Figure 5. Effects of intra-PAG oxytocin (1 nmol) -induced increases of hindpaw withdrawal latencies (HWLs) followed 5 min later by intra-PAG injections of the specific opioid receptor antagonists β-FNA, nor-BNI and Naltrindole. Changes in HWLs in response to thermal stimulation in the hotplate test (A, C and E) and to mechanical stimulation in the Randall Selitto test (B, D and F) are shown 20 min after antagonist injection. (A and B) Intra-PAG injections of β-FNA (μ-receptor antagonist) given in the dosages of 0.1, 0.5 or 1 nmol, n = 8 per group. Another group of rats received intra-PAG injection of 1 μL of 0.9% saline (Sal) followed 5 min later by intra-PAG injection of 1 nmol of β-FNA, n = 8. (C and D) Intra-PAG injections of nor-BNI (κ-receptor antagonist) given in the dosages of 0.5, 1 and 2 nmol, n = 8 per group. 1 μL of 0.9% saline (Sal) were administered, followed 5 min later by intra-PAG administration of 2 nmol of nor-BNI in an additional group of rats, n = 8. (E and F) Intra-PAG injections of Naltrindole (delta opioid-receptor antagonist) given in the dosages of 1 (n = 4) or 2 nmol (n = 8). Values are expressed as mean ± SEM.

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The authors apologise for any inconvenience caused, and we reproduce the corrected Figs 4 and 5 with their legends here.

Reference

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  2. Reference
  • Lund, I., Ge, Y., Yu, L.C., Uvnas-Moberg, K., Wang, J., Yu, C., Kurosawa, M., Agren, G., Rosen, A., Lekman, M. & Lundeberg, T. (2002) Repeated massage-like stimulation induces long-term effects on nociception - contribution of oxytocinergic mechanisms. Eur. J. Neurosci., 16, 330338.