The causes of brain tumors have been hard to discern in most cases. But Umeå researchers have previously identified an inherited predisposition for brain tumors, and now, in an international collaboration, they have also discovered a genetic variation that increases the risk of meningiomas.
Approximately 1400 people are affected annually by tumours of the brain in Sweden and 20% of those are afflicted with meningioma. The tumor itself is usually benign, but it can cause severe symptoms owing to its location and because it is sometimes malignant. It arises from the meninges, and it is more common among women.
The study included samples from a total of 1633 patients with meningiomas in Sweden, Germany, England, and Denmark. The results were published July 31 in the journal Nature Genetics.
The gene variant is close to MLLT10 on chromosome 10, a gene known to be involved in hematologic tumors. This gene has not previously been linked to increased risk of tumours.
"With more research we will be able to examine the function of these variants and whether they correlate with environmental factors, such as ionizing radiation, since the only environmental factor known previously for meningiomas is higher doses of ionizing radiation," says Beatrice Melin.
Source: News Release
Expertanswer (Expertsvar in Swedish)
August 8, 2011