One study that I know of
Cherry consumption and decreased risk of recurrent gout attacks - Zhang - 2012 - Arthritis & Rheumatism - Wiley Online Library
There is very limited evidence that I am aware of that directly studies the effect of anthocyanins (the substance in dark berries including cherries, blackberries and blueberries) in the reduction of gouty flares but there is some limited evidence suggestiing it does inhibit IL-6 thus reducing inflammation. I figure, can't hurt.
According to a lecture I attended by Dr Peng Fan (at that time he was a Clinical Professor of Medicine, Division of Rheumatology at UCLA) that even 10 lbs weight loss is associated with improved gout, that small amounts of wine (2 glasses of wine a day) is not associated with increased gout and that a strict purine diet is "unpalatable with poor long-term compliance-lowers serum urate by only 1 mg/dl."
Also from Medscape:
"Purines are found in all protein foods. All sources of purines cannot and should not be eliminated, but a low-protein diet may be helpful.
Overall, purine restriction reduces serum uric acid levels by only 1 mg/ml, at significant psychological impact. Diet modifications are rarely able to lower uric acid levels sufficiently to prevent further attacks and accumulation of urate.
Patients with gout should avoid beer and hard liquor because they elevate levels of uric acid and therefore can precipitate attacks of gout. Indeed, heavy drinkers are much more likely to have recurrent gout attacks, even with allopurinol therapy. Moderate wine intake is not associated with an increased gout flares.
[11]
Increasing dairy intake, folic acid intake, and coffee consumption may reduce gout flares.
[116]
Particularly because of the association of gout with atherosclerosis, the diagnosis of gout may be a good time to advise a low-cholesterol, low-fat diet if otherwise appropriate for the patient. While such a diet may help uric acid levels, such advice should be given primarily to help prevent atherosclerosis.
Weight reduction in patients who are obese can improve hyperuricemia. Ketosis-inducing diets (eg, fasting) should be avoided, however.
Ingestion of fructose-containing beverages should be reduced, and ingestion of milk and calcium should be increased.
[117] If hyperphosphatemia is present, phosphate-binding agents should be used. Maintaining a high level of hydration with water (at least 8 glasses of liquids per day) is helpful in avoiding attacks of gout."
If you need the listed references, PM me.
Hope this helps
Edited: Dr Fan does recommend eating less red meat and fish while reducing calories and saturated fats and increasing complex carbs. All mentioned in other posts.