Brianna: Lost credit card celebrex online purchase “We’re suggesting the reason the old brain is so vulnerable to Alzheimer’s disease is because of this massive buildup of C1q,” Barres, professor and chair of neurobiology at Stanford, told FoxNews.com.  â€œOne of the things that’s very interesting about this pattern is that the earliest accumulation of C1q starts in regions of the brain that are well-known to be most vulnerable to neurodegenerative disease – the hippocampus and substantia nigra.”