Growth in patients with mucopolysaccharidosis type III (Sanfilippo disease)

J de Ruijter1, L Broere, M F Mulder

  • 1Department of Pediatrics and Amsterdam Lysosome Centre 'Sphinx', Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.

Abstract

Insights

Growth in Mucopolysaccharidosis III (MPS III), or Sanfilippo disease, is stunted from age six, particularly in severe phenotypes. Disease-specific growth charts are now available for clinical management and future research.

Area of Science:

  • Biochemistry
  • Genetics
  • Pediatrics

Background:

  • Mucopolysaccharidosis III (MPS III), or Sanfilippo disease, is a lysosomal storage disorder causing progressive neurodegeneration.
  • While short stature is common in other MPS types, it's understudied in MPS III.
  • This study addresses the need for growth data in MPS III patients.

Purpose of the Study:

  • To investigate growth patterns in a large Dutch MPS III cohort.
  • To construct disease-specific growth charts for MPS III patients.
  • To correlate growth with genotype and phenotypic severity.

Main Methods:

  • Utilized height, weight, and head circumference data from 118 MPS III patients.
  • Constructed reference curves using the lambda, mu, sigma (LMS) method.
  • Performed genotype-group comparisons for height standard deviation scores (SDS) via Kruskal-Wallis analysis.

Main Results:

  • Birth measurements were normal, but growth stunting began around age six.
  • Mean final heights were 169.7 cm (male) and 165.4 cm (female).
  • Higher BMI and head circumference SDS were observed compared to Dutch standards; growth correlated with phenotypic severity.

Conclusions:

  • Growth in MPS III is significantly stunted, especially in severe phenotypes.
  • Disease-specific growth references are provided for clinical management.
  • These references may aid future MPS III treatment studies.