Molecular analysis of the mevalonate kinase gene in a cohort of patients with the hyper-igd and periodic fever syndrome: its application as a diagnostic tool

A Simon, L Cuisset, M F Vincent, S D van Der Velde-Visser, M Delpech, J W van Der Meer, J P Drenth
Annals of Internal Medicine 2001 September 4, 135 (5): 338-43

BACKGROUND: The hyper-IgD and periodic fever syndrome (HIDS) is characterized by recurrent attacks of fever, abdominal distress, and arthralgia and is caused by mevalonate kinase mutations.

OBJECTIVE: To ascertain the role of mevalonate kinase and the usefulness of molecular diagnosis in HIDS.

DESIGN: Cross-sectional study.

SETTING: The international Nijmegen HIDS registry.

PATIENTS: 54 patients from 41 families who met the clinical criteria for HIDS.

MEASUREMENTS: Clinical symptoms and signs, immunoglobulin concentration, leukocyte count, erythrocyte sedimentation rate, mutation analysis, and mevalonate kinase enzyme activity assay.

RESULTS: There were two groups of patients: 41 patients with mevalonate kinase mutations (classic-type HIDS) and 13 patients without mutations (variant-type HIDS). Patients with classic-type HIDS had a lower mevalonate kinase enzyme activity, a higher IgD level, and more additional symptoms with attacks. The IgD level did not correlate with disease severity, mevalonate kinase enzyme activity, or genotype.

CONCLUSION: Genetic heterogeneity exists among patients with a clinical diagnosis of HIDS.

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