Evidence map›Paper›PMID 26901066›Full record

ArticleNature genetics2016

Recurring exon deletions in the HP (haptoglobin) gene contribute to lower blood cholesterol levels.

Linda M Boettger, Rany M Salem, Robert E Handsaker, Gina M Peloso, Sekar Kathiresan, Joel N Hirschhorn, Steven A McCarroll

Abstract read
In one paragraph

Article in Nature genetics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 6 pooled it
–field-weighted citation impact
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, 6 syntheses or guidelines pooled it.

  1. A haptoglobin (HP) structural variant alters the effect of APOE alleles on Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2023
    Pooled it
  2. Pooled it
  3. Genetic determinants of circulating haptoglobin concentration.Clinica chimica acta; international journal of clinical chemistry · 2019
    Pooled it
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  11. Long-read genome sequencing and multi-omics in aging and neurodegeneration.medRxiv : the preprint server for health sciences · 2025
    Article
  12. Review
  13. Relationship between time-varying achieved HbABMJ open diabetes research & care · 2025
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  14. Article
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  16. Article
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5 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Linda M BoettgerDepartment of Genetics, Harvard Medical School, Boston, Massachusetts, USA.
Rany M SalemDepartment of Genetics, Harvard Medical School, Boston, Massachusetts, USA.
Robert E HandsakerDepartment of Genetics, Harvard Medical School, Boston, Massachusetts, USA.ORCID http://orcid.org/0000-0002-3128-3547
Gina M PelosoProgram in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.
Sekar KathiresanProgram in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.
Joel N HirschhornDepartment of Genetics, Harvard Medical School, Boston, Massachusetts, USA.
Steven A McCarrollDepartment of Genetics, Harvard Medical School, Boston, Massachusetts, USA.

Funding

Yerkes National Primate Research Center Role of type-I IFN in regulating COVID-19 induced inflammation and pathogenesisP51OD011132 · OD · EMORY UNIVERSITY · PI Joon Sup Lee · 2012 to 2026
$167.0M
Structurally complex genome loci in human populations and human phenotypesR01HG006855 · NHGRI · HARVARD MEDICAL SCHOOL · PI Steven Andrew McCarroll · 2012 to 2026
$8.2M
Discovering lipoprotein lipase pathway variants that protect against CHDK01HL125751 · NHLBI · MASSACHUSETTS GENERAL HOSPITAL · PI PELOSO, GINA MARIE · 2015 to 2018
$562k
Methods for Genetic Association Analysis of Longitudinal and Multiple PhenotypesK99HL122515 · NHLBI · BROAD INSTITUTE, INC. · PI SALEM, RANY · 2014 to 2015
$264k
NHGRI NIH HHS R01 HG006855NHGRI NIH HHS R01HG006855NHLBI NIH HHS 1K99HL122515-01A1NHLBI NIH HHS K01HL125751NHLBI NIH HHS K99 HL122515NIH HHS P51 OD011132NIH HHS P51OD011132
6 · The paper itself

Abstract

One of the first protein polymorphisms identified in humans involves the abundant blood protein haptoglobin. Two exons of the HP gene (encoding haptoglobin) exhibit copy number variation that affects HP protein structure and multimerization. The evolutionary origins and medical relevance of this polymorphism have been uncertain. Here we show that this variation has likely arisen from many recurring deletions, more specifically, reversions of an ancient hominin-specific duplication of these exons. Although this polymorphism has been largely invisible to genome-wide genetic studies thus far, we describe a way to analyze it by imputation from SNP haplotypes and find among 22,288 individuals that these HP exonic deletions associate with reduced LDL and total cholesterol levels. We further show that these deletions, and a SNP that affects HP expression, appear to drive the strong association of cholesterol levels with SNPs near HP. Recurring exonic deletions in HP likely enhance human health by lowering cholesterol levels in the blood.

Indexed as

Sequence DeletionBase SequenceCholesterolExonsGene FrequencyGenetic Association StudiesHaplotypesHaptoglobinsHumansMolecular Sequence DataPolymorphism, Single NucleotideSequence Analysis, DNACholesterolHaptoglobinsHP protein, human

Identifiers

PMID26901066
PMCPMC4811681

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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.