This Expression of Concern relates to the article ‘Induction of nitric oxide synthase-2 proceeds with the concomitant downregulation of the endogenous caveolin levels’ by Inmaculada Navarro-Lérida, María Teresa Portolés, Alberto Álvarez Barrientos, Francisco Gavilanes, Lisardo Boscá and Ignacio Rodríguez-Crespo (2004). J. Cell Sci. 117, 1687-1697 (doi: 10.1242/jcs.01002).
We have recently been made aware of concerns regarding some of the data in Fig. 4A and Fig. 6A. After discussion with the corresponding author, Ignacio Rodríguez-Crespo, we have referred this matter to Dr Rodríguez-Crespo's institute. Journal of Cell Science is publishing this note to make readers aware of the issue, and we will provide further information once it has been resolved.
This course of action follows the advice set out by COPE (Committee on Publication Ethics), of which Journal of Cell Science is a member.