So I was reading this paper on CD44 and HA and was surprised to find that HA in neural stem cells (NSCs) actually increased with age and reduced NSC proliferation. There are however many different types of HA which are generally grouped by molecular weight. Has anyone written anything about the evolution of HAs and how their built to the extent that we could attempt to control which HAs are produced? I'm wondering how Alzheimer's drugs which are being used as nootropics might effect HA and whether they are good for skin and other organs.
Any experts out there?