Skip to main content
  • Poster presentation
  • Open access
  • Published:

Significance of I313V mutation of NLPR3 gene in two pediatric patients


The I313V mutation of the NLRP3 gene has been only anecdotally reported and described in association with the so-called Magic Syndrome (Infevers database). However, nor the clinical or pathophysiological significance of such mutation has been so far reported.


To describe the clinical picture of patients carrying the I313V mutation and its consequences in IL-1β secretion.


Two families carrying NLRP3 I313V mutation were evaluated. Monocytes were obtained from patients and their parents. Cells isolated from healthy donors (HD) (N=14) were used as negative control group. Pattern of secretion of IL-1β, IL-1Ra, IL-6 and IL-8 were then assessed by ELlSA in the presence or absence exogenous LPS.


Both case #1 (M.T) and #2 (V.C) displayed a mild clinical phenotype (episodes of urticarial rash and arthralgia associated with elevation of acute phase reactants), compatible with FCAS and Muckle-Wells syndrome, respectively. Both patients displayed good response to NSAID and/or steroid on demand. Compared to HD controls, patients displayed enhanced and delayed IL1β secretion. This was accompanied by higher levels of lL1Ra and IL-6 without any significant differences in IL-8. Interestingly, parents carrying the mutation also displayed higher levels of secreted IL-1β compared to HD control group.


The I313V mutation is associated with a mild CAPS phenotype and with an increased IL-1β secretion.

Author information

Authors and Affiliations


Corresponding author

Correspondence to A Omenetti.

Rights and permissions

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and permissions

About this article

Cite this article

Omenetti, A., Antona, R., Gallizzi, R. et al. Significance of I313V mutation of NLPR3 gene in two pediatric patients. Pediatr Rheumatol 9 (Suppl 1), P305 (2011).

Download citation

  • Published:

  • DOI: