Evidence map›Paper›PMID 19079273›Full record

ReviewNature clinical practice. Endocrinology & metabolism2009

The role of the placenta in thyroid hormone delivery to the fetus.

Shiao Y Chan, Elisavet Vasilopoulou, Mark D Kilby

Abstract readReview
PubMed Publisher
In one paragraph

Review in Nature clinical practice. Endocrinology & metabolism, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 6% 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

65 citing papers in PubMed, 1 synthesis or guideline pooled it, 169 citations in OpenAlex.

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  10. Molecular pathways in placental-fetal development and disruption.Molecular and cellular endocrinology · 2024
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5 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Shiao Y ChanSchool of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
Elisavet Vasilopoulou
Mark D Kilby
University of Birmingham · GB

Funding

Medical Research Council
6 · The paper itself

Abstract

The transplacental passage of thyroid hormones from the maternal circulation to the fetal circulation within the human hemochorial placenta is important for normal fetal development, particularly the development of the central nervous system. The role of maternal thyroid hormones is particularly important in the first half of pregnancy, before the onset of endogenous thyroid hormone production in the fetus. The human placenta regulates the quantity and composition of different forms of transported thyroid hormones to ensure that the requisite levels are present in the fetus for each stage of development. Transplacental thyroid hormone supply to the fetus is modulated by several factors, including the following proteins: plasma membrane transporters, which regulate the passage of thyroid hormones in and out of cells; iodothyronine deiodinases, which metabolize thyroid hormones; and proteins within trophoblast cells, which bind thyroid hormones. In pathological situations of either maternal or fetal thyroid hormone deficiency during pregnancy, the placenta seems to lack the full compensatory mechanisms necessary to optimize maternal-fetal transfer of thyroid hormones. Inadequate passage of thyroid hormones can lead to suboptimal fetal thyroid hormone levels, which might contribute to the neurodevelopmental delay associated with such conditions. Thus, maintaining normal maternal thyroid hormone status is likely to be the primary factor in ensuring adequate transplacental thyroid hormone passage and appropriate iodide supply to the fetus.

Indexed as

FemaleFetusHumansMaternal-Fetal ExchangePlacentaPregnancyThyroid HormonesThyroid Hormones

Identifiers

PMID19079273
OpenAlexW2076684549

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.