Evidence map›Paper›PMID 20444925›Full record

ArticleThe Journal of clinical endocrinology and metabolism2010

Deletion of the noncoding GNAS antisense transcript causes pseudohypoparathyroidism type Ib and biparental defects of GNAS methylation in cis.

Smitha Chillambhi, Serap Turan, Daw-Yang Hwang, Hung-Chun Chen, Harald Jüppner, Murat Bastepe

Open access · greenAbstract read
In one paragraph

Article in The Journal of clinical endocrinology and metabolism, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
7.6field-weighted citation impact, top 2% 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

61 citing papers in PubMed, 121 citations in OpenAlex.

  1. Analysis of Multiple Families With Single Individuals Affected by Pseudohypoparathyroidism Type Ib (PHP1B) Reveals Only One Novel Maternally Inherited GNAS Deletion.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2016
    Trial
  2. Article
  3. Imprinting and skeletal disorders: lessons from pseudohypoparathyroidism and related disorders.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2025
    Review
  4. Bidirectional disruption ofProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  5. Contract to kill: GNAS mutation.Molecular cancer · 2025
    Review
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  8. Review
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  14. Review
  15. Review
  16. Molecular Definition of Pseudohypoparathyroidism Variants.The Journal of clinical endocrinology and metabolism · 2021
    Review
  17. Article
  18. A Novel GNAS Duplication Associated With Loss-of-Methylation Restricted to Exon A/B Causes Pseudohypoparathyroidism Type Ib (PHP1B).Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2021
    Article
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1 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

6 authors at 4 institutions in 3 countries.

Smitha ChillambhiEndocrine Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, 50 Blossom Street Thier 10, Boston, Massachusetts 02114, USA.
Serap Turan
Daw-Yang Hwang
Hung-Chun Chen
Harald Jüppner
Murat Bastepe
Harvard University · USKaohsiung Medical University · TWKaohsiung Medical University Chung-Ho Memorial Hospital · TWMassachusetts General Hospital · US

Funding

XLas Relative to Gsa in Bone and Mineral Ion MetabolismR01DK073911 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI BASTEPE, MURAT · 2007 to 2020
$4.9M
Molecular Definition of PseudohypoparathyroidismR37DK046718 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI JUEPPNER, HARALD W. · 2002 to 2011
$4.0M
NIDDK NIH HHS R01 DK073911NIDDK NIH HHS R37 DK046718NIDDK NIH HHS R37 DK46718
6 · The paper itself

Abstract

contextGNAS encodes the alpha-subunit of the stimulatory G protein as well as additional imprinted transcripts including the maternally expressed NESP55 and the paternally expressed XLalphas, antisense, and A/B transcripts. Most patients with pseudohypoparathyroidism type Ib (PHP-Ib) exhibit imprinting defects affecting the maternal GNAS allele, which are thought to reduce/abolish Gsalpha expression in renal proximal tubules and thereby cause resistance to PTH.

objectiveOur objective was to define the genetic defect in a previously unreported family with autosomal dominant PHP-Ib. DESIGN AND

settingAnalyses of serum and urine chemistries and of genomic DNA and lymphoblastoid-derived RNA were conducted at a tertiary hospital and research laboratory. PATIENTS: Affected individuals presented with muscle weakness and/or paresthesia and showed hypocalcemia, hyperphosphatemia, and elevated serum PTH. Obligate carriers were healthy and revealed no obvious abnormality in mineral ion homeostasis.

resultsA novel 4.2-kb microdeletion was discovered in the affected individuals and the obligate carriers, ablating two noncoding GNAS antisense exons while preserving the NESP55 exon. On maternal transmission, the deletion causes loss of all maternal GNAS imprints, partial gain of NESP55 methylation, and PTH resistance. Paternal transmission of the mutation leads to epigenetic alterations in cis, including a partial loss of NESP55 methylation and a partial gain of A/B methylation.

conclusionsThe identified deletion points to a unique cis-acting element located telomeric of the NESP55 exon that is critical for imprinting both GNAS alleles. These findings provide novel insights into the molecular mechanisms underlying PHP and GNAS imprinting.

Indexed as

DNA MethylationSequence DeletionAdultAnalysis of VarianceBlotting, SouthernChromograninsFemaleGTP-Binding Protein alpha Subunits, GsHashimoto DiseaseHumansMalePedigreePseudohypoparathyroidismReverse Transcriptase Polymerase Chain ReactionChromograninsGNAS protein, humanGTP-Binding Protein alpha Subunits, Gs

Identifiers

PMID20444925
PMCPMC2913043
OpenAlexW2140217893

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.