Female GLUT1-deficiency model mice show altered glucose and insulin responses

A post-dose response specific to female model mice

Using broad phenotypic testing, the team examined mice carrying a Slc2a1 mutation used as a model of GLUT1 deficiency. According to the announcement, only female model mice had a suppressed increase in blood glucose after glucose administration, while plasma insulin was higher 15 minutes after administration than in controls. The work concerns a mouse model, not a demonstrated treatment benefit in people.

The source says glucose responses after glucose administration had not previously been sufficiently examined in this GLUT1-deficiency mouse model, although blood glucose was generally known to be nearly normal in GLUT1 deficiency.

The reported analysis identified a female-specific pattern: a smaller post-glucose rise in blood sugar alongside higher blood insulin than controls. It also described sex differences in several other measured traits, including body weight and body-fat percentage.

The finding points to insulin dynamics and sex as factors to consider when studying GLUT1 deficiency. The researchers say it may support future drug-evaluation systems and consideration of treatment strategies tailored to patient characteristics, but it does not establish a human therapy.