IL-6 Disrupts the GH→IGF-1 Axis in Autism
Regular readers of this blog will see that there is an underlying logic behind recent posts. We know levels of the cytokine IL-6 are raised in autism and we know that high levels of IL-6 in mice produces a baby with autism and we know this can be reversed by giving IL-6 antibodies to the mother, prior to birth. We also know from numerous previous posts that growth hormone (GH) and the growth factor IGF-1 are implicated in autism. Both GH and IGF-1 are used in clinical trials for autism. Today’s post draws all this together. It turns out that IL-6 disrupts the GH-IGF-1 axis. The hormone GH is supposed to control the release of IGF-1; so a little more GH should produce a little more IGF-1. The problem is that the cytokine IL-6 disrupts this relationship. In the presence of elevated amounts of IL-6, which is characteristic of autism, and regressive autism in particular, GH does not produce the expected increase in IGF-1; IGF-1 levels are act...