Evidence map›Paper›PMID 2026424›Full record

ArticleHuman genetics1991

Effects of the apolipoprotein(a) size polymorphism on the lipoprotein(a) concentration in 7 ethnic groups.

C Sandholzer, D M Hallman, N Saha, G Sigurdsson, C Lackner, A Császár, E Boerwinkle, G Utermann

Abstract read
PubMed Publisher
In one paragraph

Article in Human genetics, 1991. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 106 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
106citing papers in PubMed, 1 pooled it
30.1field-weighted citation impact, top 1% 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

106 citing papers in PubMed, 1 synthesis or guideline pooled it, 385 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Trial
  5. Journal of the American Heart Association · 2026
    Article
  6. Cytosine base editing of LPA in transgenic mice averts large deletions.Molecular therapy : the journal of the American Society of Gene Therapy · 2026
    Article
  7. Review
  8. Review
  9. Review
  10. Article
  11. Zerlasiran for Lipoprotein(a) Reduction: Mechanisms, Evidence, and Future Directions.Cardiovascular & hematological disorders drug targets · 2026
    Review
  12. Lp(a) in the Horizon of Diagnostics and Therapy.International journal of molecular sciences · 2025
    Review
  13. Article
  14. Lipoprotein(a) and panvascular disease.Lipids in health and disease · 2025
    Review
  15. Article
  16. Review
  17. Article
  18. Portuguese Lipid Study (e_LIPID).Journal of clinical medicine · 2024
    Article
  19. The Impact of Diet on Lipoprotein(a) Levels.Life (Basel, Switzerland) · 2024
    Review
  20. Article

46 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

8 authors at 4 institutions in 4 countries.

C SandholzerInstitut für Medizinische Biologie und Humangenetik der Universität, Innsbruck, Austria.
D M Hallman
N Saha
G Sigurdsson
C Lackner
A Császár
E Boerwinkle
G Utermann
Innsbruck Medical University · ATThe University of Texas Health Science Center at Houston · USNational University Hospital · SGReykjavík Energy (Iceland) · IS

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Apolipoprotein(a) [apo(a)] exhibits a genetic size polymorphism explaining about 40% of the variability in lipoprotein(a) [Lp(a)] concentration in Tyroleans. Lp(a) concentrations and apo(a) phenotypes were determined in 7 ethnic groups (Tyrolean, Icelandic, Hungarian, Malay, Chinese, Indian, Black Sudanese) and the effects of the apo(a) size polymorphism on Lp(a) levels were estimated in each group. Average Lp(a) concentrations were highly significantly different among these populations, with the Chinese (7.0 mg/dl) having the lowest and the Sudanese (46 mg/dl) the highest levels. Apo(a) phenotype and derived apo(a) allele frequencies were also significantly different among the populations. Apo(a) isoform effects on Lp(a) levels were not significantly different among populations. Lp(a) levels were however roughly twice as high in the same phenotypes in the Indians, and several times as high in the Sudanese, compared with Caucasians. The size variation of apo(a) explains from 0.77 (Malays) to only 0.19 (Sudanese) of the total variability in Lp(a) levels. Together these data show (I) that there is considerable heterogeneity of the Lp(a) polymorphism among populations, (II) that differences in apo(a) allele frequencies alone do not explain the differences in Lp(a) levels among populations and (III) that in some populations, e.g. Sudanese Blacks, Lp(a) levels are mainly determined by factors that are different from the apo(a) size polymorphism.

Indexed as

Polymorphism, GeneticAdultAllelesApolipoproteinsAustriaChinaElectrophoresis, Polyacrylamide GelFemaleGene FrequencyHumansHungaryIcelandIndiaLipoproteinsMalaysiaMaleApolipoproteinsLipoproteins

Identifiers

PMID2026424
OpenAlexW2044515472

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.