T cell numbers relate to bone involvement in Gaucher disease.

Area of Science:

• Immunology
• Bone Metabolism
• Genetic Disorders

Background:

• Gaucher disease involves bone pathology due to impaired osteoclast and osteoblast function.
• T lymphocytes are implicated in regulating osteoblast/osteoclast activity.

Purpose of the Study:

• To investigate peripheral blood T lymphocyte subsets in genotyped type 1 Gaucher disease patients.
• To correlate T cell subset numbers with bone disease presence and severity markers.

Main Methods:

• Studied 31 genotyped type 1 Gaucher disease patients (21 non-splenectomized, 10 splenectomized).
• Analyzed peripheral blood T lymphocyte subsets (CD4+, CD8+).
• Correlated T cell counts with plasma tartrate resistant acid phosphatase (TRAP) activity.

Main Results:

• Non-splenectomized patients showed decreased T lymphocytes, particularly CD4+ subset.
• Patients with bone involvement had significantly lower CD8+ T lymphocyte counts.
• Lower CD8+ T cells correlated with higher plasma TRAP activity, indicating increased osteoclast activity.

Conclusions:

• Reduced CD8+ T cells in Gaucher disease patients are associated with bone involvement and increased osteoclast activity.
• T cell subset analysis can serve as a marker for Gaucher disease severity.
• N370S homozygosity and normal T cell counts may indicate a milder disease phenotype.