The TNFRSF1A R92Q mutation is frequent in rheumatoid arthritis but shows no evidence for association or linkage with the disease.
OBJECTIVE
TNFRSF1A mutations cause TNFRSF1A-associated periodic syndrome (MIM#142680). A recent study suggested that the R92Q mutation was associated with polyarthritis. We aimed to search for this and other TNFRSF1A mutations in rheumatoid arthritis (RA), and to test for linkage.


METHODS
The DNA of 100 trio families and 86 index cases of RA-affected sib-pair (ASP) families from the French Caucasian population were investigated by denatured high-performance liquid chromatography for TNFRSF1A mutations in exons 2 to 4. The test for association compared cases and controls (derived from un-transmitted parental chromosomes). The test for linkage relied on the transmission disequilibrium test (TDT) in trio families and cosegregation in ASP families.


RESULTS
Only the R92Q mutation was detected--in 2 of the 100 index cases of trio families and in 5 (5.8%) of the index cases of ASP families, but also in 5% of the controls, showing no association with the disease. No RA linkage evidence was found in TDT and ASP RA families.


CONCLUSIONS
This TNFRSF1A investigation in RA from the French Caucasian population showed only the R92Q mutation, with a frequency of 4.5%, but no evidence for RA association or linkage to the disease. The R92Q mutation could be considered to be a low-penetrance variant.
Dieudé
Philippe
P
Service de Rhumatologie, Hôpital Bichat Claude Bernard, 46 rue Henri Huchard, Paris 75018, France. philippe.dieude@bch.aphp.fr
Goossens
Michel
M
Cornélis
François
F
Michou
Laëtitia
L
Bardin
Thomas
T
Tchernitchko
Dimitri Olegovitch
DO
D001172:Arthritis, Rheumatoid / Q000235:genetics* / Q000276:immunology; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D009154:Mutation; D010641:Phenotype; D047888:Receptors, Tumor Necrosis Factor, Type I / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction
D047888:Receptors, Tumor Necrosis Factor, Type I; C506235:TNFRSF1A protein, human