Evidence map›Paper›PMID 25456067›Full record

ArticleEndocrinology2015

Unliganded thyroid hormone receptor α regulates developmental timing via gene repression in Xenopus tropicalis.

Jinyoung Choi, Ken-Ichi T Suzuki, Tetsushi Sakuma, Leena Shewade, Takashi Yamamoto, Daniel R Buchholz

Open access · hybridAbstract read
In one paragraph

Article in Endocrinology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed
6.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

54 citing papers in PubMed, 80 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 2 countries.

Jinyoung ChoiDepartment of Biological Sciences (J.C., L.S., D.R.B.), University of Cincinnati, Cincinnati, Ohio 45221; and Department of Mathematical and Life Sciences (K.T.S., T.S., T.Y.), Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan.
Ken-Ichi T Suzuki
Tetsushi Sakuma
Leena Shewade
Takashi Yamamoto
Daniel R Buchholz
Hiroshima University · JPUniversity of Cincinnati · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Thyroid hormone (TH) receptor (TR) expression begins early in development in all vertebrates when circulating TH levels are absent or minimal, yet few developmental roles for unliganded TRs have been established. Unliganded TRs are expected to repress TH-response genes, increase tissue responsivity to TH, and regulate the timing of developmental events. Here we examined the role of unliganded TRα in gene repression and development in Xenopus tropicalis. We used transcription activator-like effector nuclease gene disruption technology to generate founder animals with mutations in the TRα gene and bred them to produce F1 offspring with a normal phenotype and a mutant phenotype, characterized by precocious hind limb development. Offspring with a normal phenotype had zero or one disrupted TRα alleles, and tadpoles with the mutant hind limb phenotype had two truncated TRα alleles with frame shift mutations between the two zinc fingers followed by 40-50 mutant amino acids and then an out-of-frame stop codon. We examined TH-response gene expression and early larval development with and without exogenous TH in F1 offspring. As hypothesized, mutant phenotype tadpoles had increased expression of TH-response genes in the absence of TH and impaired induction of these same genes after exogenous TH treatment, compared with normal phenotype animals. Also, mutant hind limb phenotype animals had reduced hind limb and gill responsivity to exogenous TH. Similar results in methimazole-treated tadpoles showed that increased TH-response gene expression and precocious development were not due to early production of TH. These results indicate that unliganded TRα delays developmental progression by repressing TH-response genes.

Indexed as

Gene Expression Regulation, DevelopmentalMetamorphosis, BiologicalAnimalsDNA Mutational AnalysisFemaleMaleMutagenesis, Site-DirectedPhenotypeThyroid Hormone Receptors alphaThyroid HormonesXenopusThyroid Hormone Receptors alphaThyroid Hormones

Identifiers

PMID25456067
PMCPMC4298327
OpenAlexW2009639789

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.