Here's a few for depression and air pollution[1][2] Here's some studies on anti-inflammatory treatments for treatment resistant depression[3] And more relevant to the original topic, 5HT-2A receptor agonists may have anti-inflammatory effects. There's huge potential in a broad class of molecules that have been banned for moral, not medicinal, reasons.[4] Edit: picked another one [5]

1. https://www.ncbi.nlm.nih.gov/pubmed/30719959

2. https://www.sciencemag.org/news/2017/01/brain-pollution-evid...

3.https://www.healio.com/psychiatry/depression/news/online/%7B...

4.https://www.fasebj.org/doi/abs/10.1096/fasebj.2019.33.1_supp...

5.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3788795/

That's just some quick googling. There's tons more out there to read!

Sorry, but none of these are studies about the relationship between depression and inflammation treatment.

Such a study would have to provide a measurement of the severity of the depression. Then split the patients in two groups. Give one group a placebo and the other one the inflammation treatment. And then compare the depression severity in those groups after the treatment.

Somewhat dated now, but this is a good review from 2006.

Cytokines sing the blues: inflammation and the pathogenesis of depression

https://www.sciencedirect.com/science/article/pii/S147149060...

Hmm.. that seems like a journalistic article that one would have to pay $41.95 for to read it?

I would be more interested in a study. With clearly outlined methology.

It's a medical journal, Trends in Immunology, the same type of journal that all medical studies are published in. Unfortunately we still have a broken publishing system in the US so it is insanely expensive to read articles/studies published in these journals unless you work somewhere with an institution-level account.