RETRACTED: Thyroid hormone is a MAPK-dependent growth factor for thyroid cancer cells and is anti-apoptotic.
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

This article has been retracted at the request of the Editor-in-Chief.

Steroids has retracted this article because of image duplication.

Aspects of the image in Figure 7B of this article have been confirmed to be a duplicate of an image (labelled Figure 8B) which appeared in an article titled: ‘Resveratrol Induces Apoptosis in Thyroid Cancer Cell Lines via a MAPK- and p53-Dependent Mechanism’, published in JCEM, Volume 87, Issue 3, 1 March 2002, pages 1223-1232, https://doi.org/10.1210/jcem.87.3.8345.

Steroids can not confirm the authenticity of the image provided in this manuscript.
Lin
Hung-Yun
HY
Research Service, Stratton VA Medical Center, United States. hlin@ordwayresearch.org <hlin@ordwayresearch.org>
Tang
Heng-Yuan
HY
Shih
Ai
A
Keating
Travis
T
Cao
Gary
G
Davis
Paul J
PJ
Davis
Faith B
FB
D017209:Apoptosis / Q000502:physiology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D006133:Growth Substances / Q000378:metabolism*; D006801:Humans; D020928:Mitogen-Activated Protein Kinases / Q000502:physiology*; D013964:Thyroid Neoplasms / Q000201:enzymology / Q000378:metabolism*; D013974:Thyroxine / Q000378:metabolism*; D014284:Triiodothyronine / Q000378:metabolism*
D006133:Growth Substances; D014284:Triiodothyronine; D020928:Mitogen-Activated Protein Kinases; D013974:Thyroxine