EXPRESSION OF CONCERN: Melatonin Promotes Angiogenesis During Protection and Healing of Indomethacin‐Induced Gastric Ulcer: Role of Matrix Metaloproteinase‐2

K. Ganguly, A. V. Sharma, R. J. Reiter, and S. Swarnakar, "Melatonin Promotes Angiogenesis During Protection and Healing of Indomethacin-Induced Gastric Ulcer: Role of Matrix Metaloproteinase-2," Journal of Pineal Research 49, no. 2 (2010): 130-140, https://doi.org/10.1111/j.1600-079X.2010.00776.x This Expression of Concern is for the above article, published online on 02 August 2010 in Wiley Online Library (wileyonlinelibrary.com), and has been issued by agreement between the journal Editor-in-Chief, Gianluca Tosini; and John Wiley & Sons Ltd. A third party raised concerns that bands in lanes within Figure 4A (gelatin zymography) and within Figure 5B (Western blot) were highly similar and may have been duplicated. The authors responded to an inquiry by the publisher about these concerns, but they were not able to provide original data. Following this inquiry, an investigation by the publisher found further concerns of similarity between the MMP-2 gel in Figure 4C and the VEGF gel in Figure 4D, similarities of bands within Figure 6B, similarities in lanes within Figure 6C, and similarities in lanes within Figure 6D. However, the concerns could not be validated due to the condition of the image data. Because original data are no longer available, the experimental results related to these concerns cannot be validated. This Expression of Concern has been published in order to inform and alert readers about concerns with Figures 4, 5, and 6. The authors were informed of this Expression of Concern.