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. 2021 Apr 26;12:587518. doi: 10.3389/fendo.2021.587518

Figure 4.

Figure 4

Effects of interleukin (IL)-6 on cellular thyroid hormone levels. The inflammatory cytokine acts on hypothalamus and pituitary gland of the brain, on levels of free hormones, on transporters, and on cellular deiodinases. Indoxyl sulfate is a metabolite of tryptophan that accumulates in kidney damage. NEFA, non-esterified fatty acids; TBG, thyroxine binding globulin; TRH, thyrotropin releasing hormone; TSH, thyroid stimulating hormone; TTR, transthyretin.