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Study on the mechanism causing elevation of serum CA19-9 levels in diabetic patients

Jun Murai1, Sumiko Soga, Hiroshi Saito

  • 1Department of Internal Medicine, Kinki Central Hospital, Itami 664-8533, Japan.

Endocrine Journal
|May 28, 2013
PubMed

Insights

Elevated serum CA19-9 in diabetics without cancer is linked to prolonged CA19-9 half-life, not just blood sugar control. Diabetes treatment reduced CA19-9 levels, suggesting metabolic changes influence this marker.

Area of Science:

  • Endocrinology
  • Clinical Biochemistry
  • Oncomarkers

Background:

  • Serum CA19-9 levels are frequently elevated in patients with diabetes mellitus.
  • The underlying mechanisms for this elevation in diabetic individuals without apparent malignancy require elucidation.

Purpose of the Study:

  • To investigate the relationship between glycemic control and serum CA19-9 levels in diabetic patients without cancer.
  • To determine the metabolism and half-life of serum CA19-9 in this population.

Main Methods:

  • Study 1: Correlational analysis of serum CA19-9, HbA1c, glycated albumin (GA), and fasting plasma glucose (FPG) in 119 diabetic patients.
  • Study 2: Calculation of half-lives for HbA1c, GA, and serum CA19-9 before and after diabetes treatment in 6 patients with elevated CA19-9.
  • Control group: 3 diabetic patients with pancreatic cancer.

Main Results:

  • Serum CA19-9 correlated significantly with FPG, HbA1c, and GA. Multivariate analysis identified GA and FPG as significant predictors.
  • Following diabetes treatment, serum CA19-9, HbA1c, and GA levels decreased.
  • The calculated half-life of serum CA19-9 (10.9 days) was longer than previously reported for malignant tumors. Diabetic patients with pancreatic cancer showed only a marginal decrease in CA19-9 after treatment.

Conclusions:

  • Prolonged serum CA19-9 half-life is a potential contributor to elevated levels in diabetic patients without overt cancer.
  • Glycemic control, particularly glycated albumin and fasting plasma glucose, influences serum CA19-9 levels.
  • Diabetes management may lead to a reduction in serum CA19-9 levels.

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