Thromb Haemost 1998; 80(02): 233-238
DOI: 10.1055/s-0037-1615179
Rapid Communication
Schattauer GmbH

Very Low Activated Factor VII and Reduced Factor VII Antigen in Familial Abetalipoproteinaemia

G. J. Miller
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
,
K. A. Mitropoulos
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
,
M. N. Nanjee
2  Department of Cardiovascular Biochemistry, St Bartholomew’s and the Royal London School of Medicine and Dentistry, London, England
,
D. J. Howarth
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
,
J. C. Martin
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
,
M. P. Esnouf
3  Nuffield Department of Clinical Biochemistry, Radcliffe Infirmary, Oxford, England
,
B. E. A. Reeves
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
,
N. E. Miller
2  Department of Cardiovascular Biochemistry, St Bartholomew’s and the Royal London School of Medicine and Dentistry, London, England
,
J. A. Cooper
1  Medical Research Council Epidemiology and Medical Care Unit, London, England
› Author Affiliations
Further Information

Publication History

Received 13 October 1997

Accepted after resubmission 22 April 1998

Publication Date:
08 December 2017 (online)

Summary

Abetalipoproteinaemia is a rare disorder of apolipoprotein B metabolism associated with extremely low plasma concentrations of triglyce-ride. To discover whether the general positive association between factor VII and triglyceride levels extends to this condition, 5 patients were compared with 18 controls. All patients had a triglyceride below 100 μmol/l. Plasma unesterified fatty acid concentration was normal. Although factor IX activity was only slightly reduced (mean 88% standard) and factor IX antigen was normal, mean activated factor VII in patients was strikingly reduced to 34% of that in controls, a level similar to that found in haemophilia B. The patients’ mean factor VII activity and factor VII antigen were also significantly reduced to 54% and 63% of those in controls, respectively. Mean factor XI activity and tissue factor pathway inhibitor activity were reduced in patients to 70% and 75% of control values respectively, while factor XII, factor XI antigen, factor X, prothrombin and protein C were normal.