Why migraines more common among women

Females are more vulnerable to certain stress-related and allergic diseases such as migraines because of distinct differences found in mast cells, a type of white blood cell that is part of the immune system, says a study.

Mast cells are an important category of immune cells because they play a key role in stress-related health issues that are typically more common in women such as allergic disorders, auto-immune diseases, migraines and irritable bowel syndrome, or IBS.

"Over 8,000 differentially expressed genes were found in female mast cells compared to male mast cells," said lead researcher Adam Moeser, Associate Professor at Michigan State University in the US.

"While male and female mast cells have the same sets of genes on their chromosomes, with the exception of the XY sex chromosomes, the way the genes act vary immensely between the sexes," Moeser noted.

A further in-depth analysis of the genes within the RNA genome -- a primary building block in all forms of life -- revealed an increase in activity that is linked to the production and storage of inflammatory substances, according to the study published in the journal Biology of Sex Differences. These substances can create a more aggressive response in the body and result in disease.

"This could explain why women, or men, are more or less vulnerable to certain types of diseases," Moeser said. With this new understanding of how different genes act, scientists could eventually start developing new sex-specific treatments that target these immune cells and stop the onset of disease, Moeser said.