Rare GBA1 genotype associated with severe bone disease in Gaucher disease type 1

Livia d'Avila Paskulin, Rodrigo Tzovenos Starosta, Vitória Schütt Zizemer, Suélen Basgalupp, Débora Bertholdo, Filippo Pinto e. Vairo, Marina Siebert, Kristiane Michelin-Tirelli, Ida Vanessa Doederlein Schwartz

Research output: Contribution to journalArticle

Abstract

Introduction: Gaucher disease (GD) type 1 is a lysosomal disease characterised by hepatosplenomegaly, anemia, thrombocytopenia, bone changes, and bone marrow infiltration. The disease is caused by biallelic pathogenic variants in GBA1 which codes for glucocerebrosidase, an enzyme involved in the catabolic pathway of complex lipids. Aims: To report on the case of two sisters with GD type 1 who bear a genotype never reported in the literature. Case report: Patient 1 is a 47-year-old female diagnosed at 42 years of age with chronic lumbar pain, mild splenomegaly, slightly reduced platelets and normal hemoglobin values, severe Bone Marrow Burden (BMB) score, high chitotriosidase activity, and low glucocerebrosidase. Patient 2 is a 50-year-old female, sister of patient 1, who was diagnosed after familial screening. At 45 years of age, she had osteonecrosis of the left femur and a total hysterectomy because of uncontrollable bleeding. At first evaluation, she had bone pain with a high BMB score, mild splenomegaly, normal hemoglobin, normal platelets count, elevated chitotriosidase activity, and low glucocerebrosidase activity. Both patients were found to be compound heterozygotes for the p.Glu388Lys and the p.Ser405Asn variants in GBA1. Conclusions: This is the first family with GD and this combination of variants which causes a phenotype remarkable for severe bone disease with no or mild hematological manifestations.

Original languageEnglish (US)
Article number100544
JournalMolecular Genetics and Metabolism Reports
Volume21
DOIs
StatePublished - Dec 2019

Keywords

  • Bone disease
  • Gaucher disease
  • GBA1
  • Genotype
  • Phenotype

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Endocrinology

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    d'Avila Paskulin, L., Starosta, R. T., Zizemer, V. S., Basgalupp, S., Bertholdo, D., Vairo, F. P. E., Siebert, M., Michelin-Tirelli, K., & Schwartz, I. V. D. (2019). Rare GBA1 genotype associated with severe bone disease in Gaucher disease type 1. Molecular Genetics and Metabolism Reports, 21, [100544]. https://doi.org/10.1016/j.ymgmr.2019.100544