Zizzle,
I'm not sure that you really want to increase the number of prostaglandins in the intestines. I suspect that someone is confused - prostaglandins contribute to leaky blood vessels, and so I'm pretty sure that they also contribute to leaky gut.
Our work suggests that aspirin-like drugs suppress inflammatory oedema not by reducing vessel wall permeability but by inhibiting the production of vasodilator mediators (prostaglandins), which results in a reduction in plasma exudation. Thus aspirin-like drugs appear to inhibit inflammatory swelling in the same manner as the traditional method of cooling with an ice-pack--by constricting the dilated blood vessels.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2492079/
Note that inflammation is an essential part of the healing cycle - it's basically the first stage of healing, (when tissue turns red, and swells, from the inflammation). The T-cells that cause the most prominent source of inflammation with MC, are also part of the healing cycle. Unfortunately, though when they continue to infiltrate the tissue, the healing never gets anywhere - it gets stuck in the first part of the cycle, (the inflammatory phase), and never progresses from there. That's why our intestines can't heal, until we withdraw from our diet, the foods and/or drugs that are generating the inflammation.
That's also why some of us react to NSAIDs, because if we are sensitive to them, they cause the production of leukotrienes, which cause additional inflammation. I'm pretty sure that the same thing would happen if you were to induce prostaglandins - they would simply be an additional source of inflammation, where too much inflammation already exists.
When the gut is ready to heal, it will produce it's own prostaglandins to do the job:
After intestinal injury, both the number and type of intestinal epithelial cells must be restored. Intestinal stem cells, located at the base of the intestinal crypt, repopulate the depleted crypt in a process known as compensatory proliferation. In this issue of the JCI, Brown et al. describe a new mechanism by which this process is regulated (see the related article beginning on page 258). Surprisingly, they find that a subset of stromal cells present within the intestinal tissue and expressing the proliferative factor prostaglandin-endoperoxidase synthase 2 (Ptgs2) is repositioned next to the intestinal stem cell compartment where local production of PGE(2) controls injury-induced epithelial cell proliferation.
http://www.ncbi.nlm.nih.gov/pubmed/17200710
Consequently, IMO, introducing prostaglandins by any exogenous means would be counterproductive, as far as healing the gut, (or anything else, for that matter), is concerned. (But that's just my opinion, of course.)
By the way, good luck to your hubby, with his food trial.
Tex