Evidence map›Paper›PMID 19221116›Full record

ArticleHuman molecular genetics2009

Use of a genetic isolate to identify rare disease variants: C7 on 5p associated with MS.

Suvi P Kallio, Eveliina Jakkula, Shaun Purcell, Minna Suvela, Keijo Koivisto, Pentti J Tienari, Irina Elovaara, Tuula Pirttilä, Mauri Reunanen, Denis Bronnikov and 12 more

Open access · bronzeAbstract read
In one paragraph

Article in Human molecular genetics, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 4 pooled it
2.6field-weighted citation impact, top 11% 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

14 citing papers in PubMed, 4 syntheses or guidelines pooled it, 30 citations in OpenAlex.

  1. Pooled it
  2. Association between the IL7R T244I polymorphism and multiple sclerosis risk: a meta analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2016
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  9. Characterizing runs of homozygosity and their impact on risk for psychosis in a population isolate.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2014
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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

22 authors at 17 institutions in 6 countries.

Suvi P KallioFinnish Institute for Molecular Medicine, Biomedicum, Helsinki, Finland.
Eveliina Jakkula
Shaun Purcell
Minna Suvela
Keijo Koivisto
Pentti J Tienari
Irina Elovaara
Tuula Pirttilä
Mauri Reunanen
Denis Bronnikov
Markku Viander
Seppo Meri
Jan Hillert
Frida Lundmark
Hanne F Harbo
Aslaug R Lorentzen
Philip L De Jager
Mark J Daly
David A Hafler
Aarno Palotie
Leena Peltonen
Janna Saarela
Finnish Institute for Health and Welfare · FIInstitute for Molecular Medicine Finland · FIBrigham and Women's Hospital · USCenter for Human Genetics · USKarolinska Institutet · SEKarolinska University Hospital · SEKuopio University Hospital · FIMassachusetts General Hospital · USMass General Brigham · USOulu University Hospital · FISeinäjoki University of Applied Sciences · FITampere University · FITampere University · FIUniversity Hospital Ulm · DEUniversity of Helsinki · FIUniversity of Oslo · NOUniversity of Turku · FI

Funding

AN NCRR CENTER FOR HIGH THROUGHPUT SNP GENOTYPING AND ANALYSIS: GAIN NETWORKU54RR020278 · NCRR · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI GABRIEL, STACEY · 2004 to 2008
$14.4M
Isolation of Autism susceptibility genesR01MH071425 · NIMH · DECODE GENETICS, INC. · PI STEFANSSON, KARI · 2006 to 2011
$2.9M
Genetic loci predisposing to multiple sclerosis (MS)R01NS043559 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI PELTONEN, LEENA · 2002 to 2005
$984k
NCRR NIH HHS U54 RR020278NIMH NIH HHS R01MH71425-01A1NINDS NIH HHS R01 NS 43559Wellcome Trust 089061Wellcome Trust 089062
6 · The paper itself

Abstract

Large case-control genome-wide association studies primarily expose common variants contributing to disease pathogenesis with modest effects. Thus, alternative strategies are needed to tackle rare, possibly more penetrant alleles. One strategy is to use special populations with a founder effect and isolation, resulting in allelic enrichment. For multiple sclerosis such a unique setting is reported in Southern Ostrobothnia in Finland, where the prevalence and familial occurrence of multiple sclerosis (MS) are exceptionally high. Here, we have studied one of the best replicated MS loci, 5p, and monitored for haplotypes shared among 72 regional MS cases, the majority of which are genealogically distantly related. The haplotype analysis over the 45 Mb region, covering the linkage peak identified in Finnish MS families, revealed only modest association at IL7R (P = 0.04), recently implicated in MS, whereas most significant association was found with one haplotype covering the C7-FLJ40243 locus (P = 0.0001), 5.1 Mb centromeric of IL7R. The finding was validated in an independent sample from the isolate and resulted in an odds ratio of 2.73 (P = 0.000003) in the combined data set. The identified relatively rare risk haplotype contains C7 (complement component 7), an important player of the innate immune system. Suggestive association with alleles of the region was seen also in more heterogeneous populations. Interestingly, also the complement activity correlated with the identified risk haplotype. These results suggest that the MS predisposing locus on 5p is more complex than assumed and exemplify power of population isolates in the identification of rare disease alleles.

Indexed as

Case-Control StudiesChromosomes, Human, Pair 5Complement C7FinlandGenome-Wide Association StudyHaplotypesHumansMultiple SclerosisComplement C7

Identifiers

PMID19221116
PMCPMC2667286
OpenAlexW2166793056

What OpenQuestion holds

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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.