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Active Delivery of Recombinant Autoantigens via Genetically Modified Lactococcus Lactis Induces Ag-specific Tolerance

Celiac.com 09/15/2009 - Active delivery of recombinant autoantigens or allergens to intestinal mucosa by genetically modified Lactococcus lactis (LL) offers a unique therapeutic approach for the induction of tolerance to gluten proteins.

A team of researchers recently set out to determine whether oral administration of LL-delivered DQ8-specific gliadin epitope induces Ag-specific tolerance.

The research team was made up of Inge L. Huibregtse, Eric V. Marietta, Shadi Rashtak, Frits Koning, Pieter Rottiers, Chella S. David; Sander J. H. van Deventer, and Joseph A. Murray under the auspices of the Center for Experimental and Molecular Medicine of the Academic Medical Center of the University of Amsterdam in the Netherlands.

Celiac disease is associated with either HLA-DQ2- or HLA-DQ8-restricted responses to specific antigenic epitopes of gliadin, and may be treated by induction of Ag-specific tolerance.

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The research team engineered LL to secrete a deamidated DQ8 gliadin epitope (LL-eDQ8d) and then observed the induction of Ag-specific tolerance in NOD AB degrees DQ8 transgenic mice. The team measured tolerance by delayed-type hypersensitivity reaction, cytokine measurements, eDQ8d-specific proliferation, and regulatory T cell analysis.

Oral administration of LL-eDQ8d induced suppression of local and systemic DQ8-restricted T cell responses in NOD AB degrees DQ8 transgenic mice. Result was an Ag-specific decrease of the proliferative capacity of inguinal lymph node (ILN) cells and lamina propria cells. Production of IL-10 and TGF-beta and a significant induction of Foxp3(+) regulatory T cells were associated with the eDQ8d-specific suppression induced by LL-eDQ8d.

These results support the development of orally administered Ag-secreting LL to treat gluten-sensitive disorders. Such treatments may be effective even in cases of established hypersensitivity.


Journal of immunology (Baltimore, Md. : 1950) 2009;183(4):2390-6

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1 Response:

 
Hallie
Rating: ratingfullratingfullratingfullratingfullratingfull Unrated
said this on
15 Sep 2009 5:37:52 PM PDT
This is really encouraging! I wonder how soon it will be tested in humans?




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check out CoQ10, not related to celiac (as far as I know) but for balance issues.

remind your hubby, "if mama ain't happy, ain't nobody gonna be happy."

Thank you for all your help with this. I was also wondering if I could ask and hope you don't mind, will they be able to tell Celiac on the camera or will it be down to the biopsies they take? My endoscopy is on the 9th, and I am worried about not having enough gluten to show.

Vegetarian here too, celiac really makes it tough as all the Quorn meat replacement products bar the odd one or two are out Then there's all the scare sites saying only paleo type diets will repair your insides but guess what they're all heavily meat / fish based. @Ennis_TX has some good ideas for meals

Wow guys just read all the replies Thankyou all so much!!! There are so many things you've all said that has triggered a light bulb in my little head! The glasses may not be clean!! I will put this to a test. One night I'll stick to bottles of cider (double checked are gluten-free) another I'll try the Gin or William chase vodka if I can find it! And see the effects. if I loose many days due to these not working I'll see a practitioner and see what the deal is! Before I was diagnosed at Coeliac... I went to a herbalist who did a test and said corn is funny on my body!!! But then 18months later (when I became incontinant and lost a lot of weight) my bloods came back positive (after begging the docs and telling them it wasn't IBS) i don't tend to snack at bars on food but I must admit I never thought it could be the way it's served!! The humour and information has made me feel so much better thanks all xxx