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Decreased C-peptide secretion in sickle cell anemia
S T Saad1, G S Braga, M J Saad
1Department of Clinical Medicine, State University of Campinas, Unicamp, Brazil.
Acta Haematologica
|January 1, 1989
Summary
Adults with sickle cell anemia show impaired insulin secretion, evidenced by lower C-peptide levels during intravenous glucose tolerance tests (IVGTT). This suggests pancreatic dysfunction or a linked genetic factor in sickle cell disease.
Area of Science:
- Endocrinology
- Hematology
- Genetics
Background:
- Sickle cell anemia (SCA) is a genetic blood disorder with potential systemic complications.
- Endocrine function, particularly pancreatic insulin secretion, may be affected in SCA patients.
Purpose of the Study:
- To investigate insulin secretion capacity in adults with sickle cell anemia.
- To compare glucose metabolism and C-peptide levels between SCA patients and healthy controls using intravenous glucose tolerance tests (IVGTT).
Main Methods:
- Intravenous glucose tolerance tests (IVGTT) were conducted on 9 adults with SCA and 15 healthy controls.
- Blood samples were collected serially over 60 minutes post-glucose infusion for glucose and C-peptide assays.
Main Results:
- SCA patients exhibited significantly lower mean C-peptide concentrations compared to controls (p < 0.05) after glucose infusion.
- No significant differences in glucose concentrations were observed between the SCA and control groups during the IVGTT.
Conclusions:
- Results indicate potentially inadequate insulin secretion from the endocrine pancreas in sickle cell anemia.
- An independent genetic abnormality linked to the beta-s gene is also considered a possible explanation for the observed C-peptide levels.