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Lymphocyte subset pattern in acromegaly.

A Colao1, D Ferone, P Marzullo

  • 1Department of Molecular and Clinical Endocrinology and Oncology, Federico II University of Naples, Italy. colao@unina.it

Journal of Endocrinological Investigation
|April 4, 2002
PubMed
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This study reveals altered immune cell profiles in acromegaly patients, showing increased T-cell activity and decreased B-cell activity. These findings highlight immune system abnormalities associated with chronic growth hormone and IGF-1 excess.

Area of Science:

  • Endocrinology and Immunology
  • Study of immune cell surface antigen clusters in endocrine disorders

Background:

  • Immune function in acromegaly patients remains poorly understood.
  • Acromegaly is characterized by chronic excess of growth hormone (GH) and insulin-like growth factor 1 (IGF-1).

Purpose of the Study:

  • To investigate the main surface antigen clusters of circulating lymphocytes in patients with active acromegaly.
  • To evaluate potential immune system abnormalities in acromegaly.

Main Methods:

  • Flow cytometry was used to analyze lymphocyte subsets in 100 acromegalic patients and 200 healthy controls.
  • Monoclonal antibodies specific for CD3, CD4, CD8, CD16, and CD19 were utilized to identify T-cells, T-helpers, T-suppressors, NK cells, and B-cells.

Main Results:

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  • Acromegalic patients exhibited significantly increased levels of CD3 and CD4 T-cells.
  • A significant decrease in CD8 T-cells and CD19 B-cells was observed in acromegalic patients compared to controls.
  • These changes occurred independently of age.

Conclusions:

  • Active acromegaly is associated with increased T-cell activity and decreased B-cell activity.
  • The study supports the presence of immune system dysregulation in chronic GH/IGF-1 excess conditions.
  • Findings underscore the link between endocrine disorders and immune system alterations.