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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Expression of three forms of thyroid hormone receptor in human tissues.

At least two thyroid hormone receptor ( hTR) genes are present in humans, but the significance of this multiplicity is unknown. These receptors could have differences in tissue distribution or possess different functions. We studied the distribution and abundance of three hTR mRNAs (hTR beta, hTR alpha 1, and hTR alpha 2) by Northern blot analysis. Three mRNAs were expressed in all tissues examined. hTR beta was strongly expressed in brain and prostate predominantly as a 10.0-kilobase (kb) mRNA. This mRNA was also expressed in thyroid and was much less abundant in liver, kidney, placenta, tonsil, and spleen. hTR alpha 1 is represented by two mRNAs with sizes of 6.0 and 3.2 kb. The 6.0-kb mRNA was constantly less abundant than the 3.2-kb mRNA. hTR alpha 2 was detected as a single mRNA with a size of 3.2 kb, using a probe unique for this mRNA. Both hTR alpha 1 and hTR alpha 2 were strongly expressed in brain, prostate, and thyroid and much less in other tissues. The relative amounts of the three hTR mRNAs were roughly parallel in each tissue. It is of interest that none of these hTRs was abundant in liver, which is the major thyroid hormone-responsive organ. Another hTR may be present in liver.[1]

References

  1. Expression of three forms of thyroid hormone receptor in human tissues. Sakurai, A., Nakai, A., DeGroot, L.J. Mol. Endocrinol. (1989) [Pubmed]
 
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