Yes, they are working on a drug as my article said. But in reality the zonulin is being triggered by something--gluten in some, infection in others. I recall Cort posting about someone who got better using probiotics. Prebiotics, probiotics and dietary change would be worthwhile.
"We and others have suggested that changes in the distribution and localization of two tight junction proteins (zonula occludens-1 and occludin) in the intestinal tissue are associated with higher gut permeability in obese and diabetic rodents. This phenomenon has been directly linked to specific changes in the gut microbiome [9–13]. In addition, we have demonstrated that specific changes of the gut microbiota by using prebiotics (short chain inulin-type fructans, oligofructose) positively affect the gut barrier function, with a marked improvement of the gut permeability and the hepatic and systemic inflammatory tone. These interesting effects observed after changing the gut microbiota by prebiotics demonstrated a novel microbiota–host interaction dependent effect. Importantly, we have recently discovered that in addition to the previously considered impact of prebiotics on Bifi- dobacterium spp. and Lactobacillus spp., prebiotic treatment modifies up to 102 gut bacterial taxa from the phylum level down to the 100%-ID phylotype level."
http://www.clinicalmicrobiologyandinfection.com/article/S1198-743X(14)60970-8/pdf
In my case, I had obvious celiac with uclerative proctitis from age 9 that was completely missed through my entire childhood and much of my early adulthood, until I figured it out. I also was caesarean, so I didn't get the lactobacilli and bifidus I needed from the vaginal canal of my mother, *and* she stopped breastfeeding after 6 weeks, and bottle feeding leads to a less diverse and healthy microbiome. All that makes me wonder if my gut will ever be "normal" or can be totally repaired. And there is also the very serious issue of cross contamination on a gluten free diet, which I have written about in Quartz recently:
http://qz.com/569410/the-gluten-free-craze-is-making-celiacs-like-me-sick/
Cross contamination is *sooooooooo* pervasive, that limiting all grains for a while (except white rice, which Fasano allows on his trace elimination diet) might be helpful.