1 DNA and proteins are key molecules of the cell nucleus. 2  One gene makes one protein. 3  A gene is made of DNA. 4  Bacteria and viruses have DNA too. 5  The DNA molecule is shaped like a twisted ladder. 6  A half DNA ladder is a template for copying the whole.  RNA is an intermediary between DNA and protein.
1 Another theory holds that depression may directly damage the brain, leading to dementia. âSimply put, chronic stress and/or depression may result in the release of cortisol,â Gorman says. Over time, this stress hormone can harm the brain, she says.  A third theory points to reduced brain volume.
Other psychological symptoms that people with dementia may develop include depression and anxiety. For information about these symptoms and how they can be treated see our page: Depression and anxiety. Drugs used to relieve behavioral and psychological symptoms. People with dementia may develop behavioural and psychological symptoms including restlessness, aggression, delusions, hallucinations, apathy and sleep disturbances. This page looks at the different types of drugs that can be used to treat these symptoms if non-drug treatments have not worked.