Retraction: The following article from the Journal of Cellular Biochemistry, “Inhibition of Constitutive Activity of Nuclear Transcription Factor kappaB Sensitizes Doxorubicin-Resistant Cells to Apoptosis” by Charitha Gangadharan, Maikho Thoh, and Sunil K. Manna, published online on February 25, 2009, in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor-in-Chief, Gary S. Stein, and Wiley Periodicals, Inc. The authors have requested the retraction as some of the data was not properly documented as per the norms of good laboratory practice. J. Cell. Biochem. 114:1456, 2013. © 2013 Wiley Periodicals, Inc.