Inhibition of human thyroid peroxidase gene expression by interleukin 1

1989 ◽  
Vol 121 (4) ◽  
pp. 465-469 ◽  
Author(s):  
Kiyoto Ashizawa ◽  
Shunichi Yamashita ◽  
Tamami Tobinaga ◽  
Yuji Nagayama ◽  
Hironori Kimura ◽  
...  
Keyword(s):  
Gene Expression ◽  
Interleukin 1 ◽  
Mrna Level ◽  
Inhibitory Effect ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Hormone Synthesis ◽  
Peroxidase Gene ◽  
Camp Analogue ◽  
Human Thyroid Peroxidase

Abstract. We have already demonstrated the inhibitory effect of interleukin 1 on thyroglobulin gene expression. Recent availability of thyroid peroxidase cDNA has allowed us to investigate the regulation of thyroid peroxidase gene. Therefore, the regulation of thyroid peroxidase mRNA by interleukin 1 in cultured human thyrocytes was investigated. Thyrocytes dispersed from thyroid tissues from patients with Graves' disease were incubated with TSH with or withtout recombinant human interleukin 1. Unstimulated human thyrocytes did not contain any detectable thyroid peroxidase mRNA, however, TSH-stimulated thyrocytes expressed four thyroid peroxidase mRNA transcripts (4.0, 3.2, 2.1 and 1.7 kb, respectively). Both interleukin 1 α and β inhibited TSH-induced thyroid peroxidase mRNA in a dose responsive manner; 103 U/l interleukin l caused maximal suppression of TSH-induced thyroid peroxidase mRNA level to nearly basal levels. Interleukin l also inhibited cAMP analogue 8-bromo-cyclic AMP induced thyroid peroxidase mRNA level. In contrast the γ-actin mRNA hybridization signal was not altered in control or treated cells. These results demonstrate that interleukin 1 directly inhibits TSH-induced thyroid peroxidase gene expression and provide further evidence for a paracrine role of interleukin 1 as a local inhibitor of thyroid hormone synthesis.

Interleukin 6 inhibits human thyroid peroxidase gene expression

1991 ◽  
Vol 124 (3) ◽  
pp. 290-294 ◽  
Author(s):  
Tan Tominaga ◽  
Shunichi Yamashita ◽  
Yuji Nagayama ◽  
Shigeki Morita ◽  
Naokata Yokoyama ◽  
...  
Keyword(s):  
Gene Expression ◽  
Interleukin 6 ◽  
Interleukin 1 ◽  
Hormone Secretion ◽  
Interferon Γ ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Dependent Manner ◽  
Human Thyroid Peroxidase ◽  
Dose Dependent

Abstract. It has been reported that cytokines, especially interleukin 1 and interferon-γ, inhibit the thyroid hormone secretion and the gene expression of human thyroid peroxidase and thyroglobulin. Interleukin 6 has recently been found to be an important cytokine for the regulation of immunoendocrine interaction and intrathyroidal production of interleukin 6 has been reported. Therefore, we investigated the regulation of thyroid hormone secretion and thyroid peroxidase messenger RNA by interleukin 6 in human thyrocytes to clarify further the functional role of interleukin 6 in thyroid glands. Thyrocytes dispersed from Graves' thyroid tissues were incubated with TSH with or without interleukin 6. TSH (5 U/l stimulated the expression of thyroid peroxidase mRNA transcripts (4.0, 3.2, 2.1, and 1.7 kb, respectively), although unstimulated thyrocytes contained the low level of 3.2 kb thyroid peroxidase mRNA transcript. Interleukin 6 (104-105 U/l) inhibited TSH-induced thyroid peroxidase mRNA in a dose-dependent manner, although the basal level of thyroid peroxidase mRNA expression was not suppressed by interleukin 6. Interleukin 6 also inhibited 8-bromo-cyclic adenosine monophosphate-induced thyroid peroxidase mRNA levels. In contrast, the γ-action mRNA hybridization signal was not altered in control or treated cells. Subsequently, interleukin 6 inhibited TSH-induced T3 secretion in a dose-dependent manner after 72 h treatment. However, interleukin 6 did not affect DNA synthesis. Pretreatment with specific antibody against interleukin 6 selectively restored the inhibitory effect of interleukin 6 on thyroid peroxidase gene expression. Our results suggest that interleukin 6 plays an inhibitory role in the thyroid gland, in addition to interleukin 1 and interferon γ.

Thyroid-specific enhancer-binding protein (T/EBP): cDNA cloning, functional characterization, and structural identity with thyroid transcription factor TTF-1

1991 ◽  
Vol 11 (10) ◽  
pp. 4927-4933
Author(s):  
K Mizuno ◽  
F J Gonzalez ◽  
S Kimura
Keyword(s):  
Transcription Factor ◽  
Hepg2 Cells ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Enhancer Activity ◽  
Cis Acting ◽  
Peroxidase Gene ◽  
Enhancer Binding Protein ◽  
Human Thyroid Peroxidase ◽  
Double Stranded Oligonucleotide

A cDNA clone encoding a thyroid-specific enhancer-binding protein (T/EBP) was isolated from a rat thyroid-derived FRTL-5 cell lambda gt 11 expression library, using a double-stranded oligonucleotide probe. This oligonucleotide was previously demonstrated to have the strongest binding affinity among three cis-acting DNA elements within the thyroid-specific enhancer region located 5.5 kbp upstream of the human thyroid peroxidase gene transcription start site. Nucleotide and deduced amino acid sequences of the cDNA revealed that T/EBP is identical to the previously reported thyroid-specific transcription factor 1 (TTF-1), which binds to the promoter of the rat thyroglobulin gene and controls its thyroid-specific expression. Expression of the T/EBP cDNA under control of the human cytomegalovirus major immediate-early gene promoter conferred thyroid-specific enhancer activity of as high as 26-fold to nonpermissive human hepatoma HepG2 cells when cotransfected with a vector containing 6.3 kbp of upstream sequence of the human thyroid peroxidase gene connected to a luciferase reporter gene. T/EBP was further expressed in HepG2 cells by using the vaccinia virus expression system. The expressed protein was partially purified by using sequence-specific affinity column chromatography and was further shown, by gel mobility shift experiments, to specifically bind to the enhancer-derived double-stranded oligonucleotide. These results clearly indicate that the binding of T/EBP (TTF-1) to the specific cis-acting enhancer element is largely responsible for thyroid-specific enhancer activity.

Iodide uptake in human anaplastic thyroid carcinoma cells after transfer of the human thyroid peroxidase gene

2001 ◽  
Vol 28 (5) ◽  
pp. 633-638 ◽  
Author(s):  
Uwe Haberkorn ◽  
Annette Altmann ◽  
Shiming Jiang ◽  
Iris Morr ◽  
Miriam Mahmut ◽  
...  
Keyword(s):  
Thyroid Carcinoma ◽  
Anaplastic Thyroid Carcinoma ◽  
Carcinoma Cells ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Iodide Uptake ◽  
Peroxidase Gene ◽  
Human Thyroid Peroxidase

scholarly journals Thyroid-specific enhancer-binding protein (T/EBP): cDNA cloning, functional characterization, and structural identity with thyroid transcription factor TTF-1.

1991 ◽  
Vol 11 (10) ◽  
pp. 4927-4933 ◽  
Author(s):  
K Mizuno ◽  
F J Gonzalez ◽  
S Kimura
Keyword(s):  
Transcription Factor ◽  
Hepg2 Cells ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Enhancer Activity ◽  
Cis Acting ◽  
Peroxidase Gene ◽  
Enhancer Binding Protein ◽  
Human Thyroid Peroxidase ◽  
Double Stranded Oligonucleotide

A cDNA clone encoding a thyroid-specific enhancer-binding protein (T/EBP) was isolated from a rat thyroid-derived FRTL-5 cell lambda gt 11 expression library, using a double-stranded oligonucleotide probe. This oligonucleotide was previously demonstrated to have the strongest binding affinity among three cis-acting DNA elements within the thyroid-specific enhancer region located 5.5 kbp upstream of the human thyroid peroxidase gene transcription start site. Nucleotide and deduced amino acid sequences of the cDNA revealed that T/EBP is identical to the previously reported thyroid-specific transcription factor 1 (TTF-1), which binds to the promoter of the rat thyroglobulin gene and controls its thyroid-specific expression. Expression of the T/EBP cDNA under control of the human cytomegalovirus major immediate-early gene promoter conferred thyroid-specific enhancer activity of as high as 26-fold to nonpermissive human hepatoma HepG2 cells when cotransfected with a vector containing 6.3 kbp of upstream sequence of the human thyroid peroxidase gene connected to a luciferase reporter gene. T/EBP was further expressed in HepG2 cells by using the vaccinia virus expression system. The expressed protein was partially purified by using sequence-specific affinity column chromatography and was further shown, by gel mobility shift experiments, to specifically bind to the enhancer-derived double-stranded oligonucleotide. These results clearly indicate that the binding of T/EBP (TTF-1) to the specific cis-acting enhancer element is largely responsible for thyroid-specific enhancer activity.

Retinole acid inhibits human thyroid peroxidase and thyroglobulin gene expression in cultured human thyrocytes

1993 ◽  
Vol 16 (2) ◽  
pp. 87-93 ◽  
Author(s):  
H. Namba ◽  
S. Yamashita ◽  
S. Morita ◽  
M. C. Villadolid ◽  
H. Kimura ◽  
...  
Keyword(s):  
Gene Expression ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Human Thyroid Peroxidase ◽  
Thyroglobulin Gene

Screening for mutations of the human thyroid peroxidase gene in patients with congenital hypothyroidism

2009 ◽  
Vol 104 (S 04) ◽  
pp. 121-123 ◽  
Author(s):  
A. Grüters ◽  
B. Köhler ◽  
A. Wolf ◽  
A. Söling ◽  
L. de Vijlder ◽  
...  
Keyword(s):  
Congenital Hypothyroidism ◽  
Human Thyroid ◽  
Thyroid Peroxidase ◽  
Peroxidase Gene ◽  
Human Thyroid Peroxidase
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