Summary
Antithrombin III (AT III) levels have been reported to be low, normal, and high in
diabetes mellitus. Furthermore, a dicrepancy between AT III activity and antigen concentration
was reported. We have evaluated the behaviour of AT III activity and antigen level
both in type 1 and type 2 diabetes, either in uncontrolled or in well controlled patients.
AT III activity and antigen levels showed values similar to normal. No difference
was seen between type 1 and type 2 diabetes. Similar results were observed in the
group of well controlled diabetic patients. AT III activity and antigen did not correlate
with blood glucose and glycosylated haemoglobin (HbA1). No difference was observed between AT III activity and antigen levels in any group.
Therefore the hypercoagulable state found in diabetes mellitus does not depend on
AT III modifications. A discrepancy between AT III activity and antigen was not confirmed.
A dysantithrombinaemia, explained on the basis of an inactivation of protein glycosylation
in diabetes mellitus has not been confirmed.
Keywords
Antithrombin III activity and antigen - Glycosylated haemoglobin - Diabetes mellitus