Can psoriasis biologics reduce Alzheimer's disease risk?

In the bad news department: A new study reported in the scientific journal Neurology suggests that people with high levels of tumor necrosis factor-alpha (TNF-alpha) may be more likely to develop Alzheimer's disease. TNF-alpha is a cytokine--a type of protein that helps cells communicate--that is elevated in psoriasis patients. As Reuters noted in Inflammation may contribute to Alzheimer's disease:

individuals with the highest production of tumor necrosis factor-alpha were 30 percent more likely to develop Alzheimer's disease than those with the lowest production of tumor necrosis factor-alpha.

Silver lining department: Some of the biologics approved to treat psoriasis and psoriatic arthritis work by reducing levels of TNF-alpha. Wouldn't it be nice if scientists someday can show that the treatments many psoriasis patients must take to treat their disease may have other health benefits?