Evidence map›Paper›PMID 22923661›Full record

ArticleAmerican journal of respiratory and critical care medicine2012

Longitudinal analysis casts doubt on the presence of genetic anticipation in heritable pulmonary arterial hypertension.

Emma K Larkin, John H Newman, Eric D Austin, Anna R Hemnes, Lisa Wheeler, Ivan M Robbins, James D West, John A Phillips, Rizwan Hamid, James E Loyd

Open access · greenAbstract read
In one paragraph

Article in American journal of respiratory and critical care medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 116 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
116citing papers in PubMed, 2 pooled it
8.5field-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

116 citing papers in PubMed, 2 syntheses or guidelines pooled it, 216 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
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  11. Bone morphogenetic protein-9 controls pulmonary vascular growth and remodeling.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  12. Article
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  18. Deep phenotyping of unaffected carriers of pathogenicThe European respiratory journal · 2024
    Article
  19. Article
  20. Review

56 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 2 institutions in 1 country.

Emma K LarkinVanderbilt University Institute for Medicine and Public Health, Vanderbilt Medical Center North, Nashville, TN 37232-2650, USA.
John H Newman
Eric D Austin
Anna R Hemnes
Lisa Wheeler
Ivan M Robbins
James D West
John A Phillips
Rizwan Hamid
James E Loyd
Pulmonary and Allergy Associates · USVanderbilt University · US

Funding

VANDERBILT UNIVERSITY CTSA FOR PEDIATRIC RESEARCHUL1RR024975 · NCRR · VANDERBILT UNIVERSITY · PI BERNARD, GORDON RAPHAEL · 2007 to 2011
$45.7M
Interventions Against the Molecular Etiology of BMPR2-induced PAHR01HL095797 · NHLBI · VANDERBILT UNIVERSITY MEDICAL CENTER · PI WEST, JAMES D · 2010 to 2022
$6.7M
The Vanderbilt Institute for Clinical and Translational Research (VICTR) KL2KL2RR024977 · NCRR · VANDERBILT UNIVERSITY · PI BERNARD, GORDON RAPHAEL · 2007 to 2011
$3.0M
Role of BMPR2 expression in HPAH; implications for novel therapeutic approachesR01HL102020 · NHLBI · VANDERBILT UNIVERSITY MEDICAL CENTER · PI HAMID, RIZWAN · 2011 to 2015
$2.3M
The Vanderbilt Institute for Clinical and Translational Research (VICTR) TL1TL1RR024978 · NCRR · VANDERBILT UNIVERSITY · PI BERNARD, GORDON RAPHAEL · 2007 to 2011
$1.3M
Variations in estrogen exposures may modify pulmonary arterial hypertensionK23HL098743 · NHLBI · VANDERBILT UNIVERSITY · PI AUSTIN, ERIC DOUGLAS · 2010 to 2014
$652k
Gender differences and endothelin responses in right ventricular afterload stressK08HL093363 · NHLBI · VANDERBILT UNIVERSITY · PI HEMNES, ANNA R · 2008 to 2012
$627k
Functions of the TG-Interacting Transcription Factor (TGIF) in HematopoiesisK08HL089903 · NHLBI · VANDERBILT UNIVERSITY · PI HAMID, RIZWAN · 2009 to 2012
$441k
NCRR NIH HHS KL2 RR024977NCRR NIH HHS TL1 RR024978NCRR NIH HHS UL1 RR024975NHLBI NIH HHS 1R01HL102020-01NHLBI NIH HHS 5 K08 HL093363NHLBI NIH HHS K08 HL089903NHLBI NIH HHS K08 HL093363NHLBI NIH HHS K23 HL098743NHLBI NIH HHS K23 HL0987431NHLBI NIH HHS R01 HL095797NHLBI NIH HHS R01 HL 095797-01A2NHLBI NIH HHS R01 HL102020
6 · The paper itself

Abstract

rationaleAnalysis of the age of onset in heritable pulmonary arterial hypertension (HPAH) has led to the hypothesis that genetic anticipation causes younger age of onset and death in subsequent generations. With accrual of pedigree data over multiple decades, we retested this hypothesis using analyses that eliminate the truncation of data that exists with shorter duration of follow-up.

objectivesTo analyze the pedigrees of families with mutations in bone morphogenetic protein receptor type 2 (BMPR2), afflicted in two or more generations with HPAH, eliminating time truncation bias by including families for whom we have at least 57 years of data.

methodsWe analyzed 355 individuals with BMPR2 mutations from 53 families in the Vanderbilt Pulmonary Hypertension Registry. We compared age at diagnosis or death in affected individuals (n = 249) by generation within families with multigenerational disease. We performed linear mixed effects models and we limited time-truncation bias by restricting date of birth to before 1955. This allowed for 57 years of follow-up (1955-2012) for mutation carriers to develop disease. We also conducted Kaplan-Meier analysis to include currently unaffected mutation carriers (n = 106). MEASUREMENTS AND MAIN

resultsDifferences in age at diagnosis by generation were found in a biased analysis that included all birth years to the present, but this finding was eliminated when the 57-year observation limit was imposed. By Kaplan-Meier analysis, inclusion of currently unaffected mutation carriers strengthens the observation that bias of ascertainment exists when recent generations are included.

conclusionsGenetic anticipation is likely an artifact of incomplete time of observation of kindreds with HPAH due to BMPR2 mutations.

Indexed as

Anticipation, GeneticAdultAgedAge of OnsetBone Morphogenetic Protein Receptors, Type IIFamilial Primary Pulmonary HypertensionFemaleHumansHypertension, PulmonaryKaplan-Meier EstimateMaleMiddle AgedMutationPedigreeRegistriesBMPR2 protein, humanBone Morphogenetic Protein Receptors, Type II

Identifiers

PMID22923661
PMCPMC3530218
OpenAlexW2125135590

What OpenQuestion holds

Textmetadata
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.