Mutations in the hereditary haemochromatosis gene HFE in professional endurance athletes.
BACKGROUND
Hereditary haemochromatosis, a disease that affects iron metabolism, progresses with a greater or lesser tendency to induce iron overload, possibly leading to severe organ dysfunction. Most elite endurance athletes take iron supplements during their active sporting life, which could aggravate this condition.


OBJECTIVE
To determine the prevalence and discuss potential clinical implications of mutations of HFE (the gene responsible for hereditary haemochromatosis) in endurance athletes.


METHODS
Basal concentrations of iron, ferritin, and transferrin and transferrin saturation were determined in the period before competition in 65 highly trained athletes. Possible mutations in the HFE gene were evaluated in each subject by extracting genomic DNA from peripheral blood. The restriction enzymes SnaBI and BclI were used to detect the mutations 845G-->A (C282Y) and 187C-->G (H63D).


RESULTS
Our findings indicate a high prevalence of HFE gene mutations in this population (49.2%) compared with sedentary controls (33.5%). No association was detected in the athletes between mutations and blood iron markers.


CONCLUSIONS
The findings support the need to assess regularly iron stores in elite endurance athletes.
Departamento de Enfermería, Universidad Complutense, Madrid, Spain.
J L
JL
Chicharro
J
J
Hoyos
F
F
Gómez-Gallego
J G
JG
Villa
F
F
Bandrés
P
P
Celaya
F
F
Jiménez
J M
JM
Alonso
A
A
Córdova
A
A
Lucia
D000328:Adult; D001642:Bicycling; D005293:Ferritins / Q000097:blood; D006432:Hemochromatosis / Q000235:genetics*; D000071020:Hemochromatosis Protein; D015395:Histocompatibility Antigens Class I / Q000235:genetics*; D006801:Humans; D007501:Iron / Q000008:administration & dosage / Q000097:blood; D019190:Iron Overload / Q000235:genetics*; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D009154:Mutation / Q000235:genetics; D010807:Physical Endurance / Q000235:genetics; D012420:Running; D014168:Transferrin / Q000032:analysis
C103673:HFE protein, human; D000071020:Hemochromatosis Protein; D015395:Histocompatibility Antigens Class I; D008565:Membrane Proteins; D014168:Transferrin; D005293:Ferritins; D007501:Iron