No popular authors found.
Ads by Google:

Categories

No categories found.


Get Celiac.com's E-Newsletter




Ads by Google:



Follow / Share


  FOLLOW US:
Twitter Facebook Google Plus Pinterest RSS Podcast Email  Get Email Alerts

SHARE:

Popular Articles

No popular articles found.
Celiac.com Sponsors:

Gut Microorganisms Cause Gluten-Induced Pathology in Mouse Model of Celiac Disease

Celiac.com 01/18/2016 - How come only 2% to 5% of genetically susceptible individuals develop celiac disease?

Photo: National Cancer InstituteResearchers attempting to answer that question have turned their focus to environmental factors, including gut microorganisms, that may contribute to the development of celiac disease.

In a recent study, published in The American Journal of Pathology, researchers using a humanized mouse model of gluten sensitivity found that the gut microbiome can play an important role in the body's response to gluten.

Their data show that the rise in overall celiac disease rates over the last 50 years may be driven, at least partly, by variations in gut microbiota. If this proves to be true, then doctors may be able to craft "specific microbiota-based therapies" that "aid in the prevention or treatment of celiac disease in subjects with moderate genetic risk," says lead investigator Elena F. Verdu, MD, PhD, Associate Professor, Division of Gastroenterology, Department of Medicine, Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON (Canada).

For their study, the team used mice that express the human DQ8 gene, which makes them genetically susceptible to inflammatory responses to gluten, researchers compared immune responses and pathology in the guts of mice that differed in their gut microorganisms.

The three groups included germ-free mice, clean–specific-pathogen-free (SPF) mice with microbiota free of opportunistic pathogens and Proteobacteria, and conventional SPF mice that were colonized with a mixture of microorganisms including opportunistic pathogens and Proteobacteria.

For example, the microbial profile of conventional SPF mice included Staphylococcus, Streptococcus, and Helicobacter, while the clean SPF had none. Researchers already know that growth and activation of intraepithelial lymphocytes (IELs) is an early sign of celiac disease.

Ads by Google:

This research team saw that gluten treatment led to increased IEL counts in germ-free mice, but not in clean SPF mice. The gluten-induced IEL response in germ-free mice was accompanied by increased cell death in the cells lining the gastrointestinal tract (enterocytes), as well as anatomical changes in the villi lining the small intestine.

The germ-free mice also developed antibodies to a component of gluten, known as gliadin, and displayed pro-inflammatory gliadin-specific T-cell responses. A non-gluten protein, zein, did not affect IEL counts, indicating that the response was gluten specific. Meanwhile, the mice colonized with limited opportunistic bacteria (clean SPF), did not develop gluten-induced pathology, compared to germ-free mice or conventional SPF mice with a more diverse microbiota.

Interestingly, this protection was suppressed when clean SPF mice were supplemented with an enteroadherent E. coli isolated from a patient with celiac disease. These results are preliminary, and other researchers stress that the specific role of Proteobacteria in celiac disease should not be over interpreted.

In an accompanying Commentary, Robin G. Lorenz, MD, PhD, of the Department of Pathology at the University of Alabama at Birmingham, writes that these findings "implicate opportunistic pathogens belonging to the Proteobacteria phylum in celiac disease; however, this does not indicate that Proteobacteria cause celiac disease."

Instead, Dr. Lorenz suggests, there may be numerous possible avenues by which Proteobacteria enhance the exposure and immune response to gluten or gliadin.

So, the takeaway here is that, while these early results are highly interesting and certainly merit follow-up, it's way too early to say that certain types of gut bacteria may be driving celiac disease, and any types of bacterial treatments that might prevent celiac disease from developing are just the stuff of imagination.

Still, this is an important discovery that might pave the way for exactly such types of therapy in the future, so stay tuned.

Source:

Celiac.com welcomes your comments below (registration is NOT required).





Spread The Word







Related Articles



2 Responses:

 
Heather
Rating: ratingfullratingfullratingfullratingfullratingfull Unrated
said this on
25 Jan 2016 5:28:10 AM PDT
I'm definitely not a fan of animal testing when there is already a way to control celiac by diet choices. Too much money is made doing animal testing. It usually starts out on mice so no will will care, but it happens to dogs, rabbits, monkeys, and other animals. It's barbaric and although it may occasionally seem to be the only avenue (this is argued by many, including scientists), in this case it definitely seems like it's just lining someone's pockets at the expense of animals. As a celiac (technically now just gluten-intolerant since the diet change remedied the "celiac condition"), I will stay on a gluten free diet for life, since it has worked for me. No need for me to be lining the pockets of the huge pharmaceuticals, and the animal testing industry.

 
Peg
Rating: ratingfullratingfullratingfullratingfullratingempty Unrated
said this on
27 Jan 2016 5:49:20 AM PDT
interesting article!




Rate this article and leave a comment:
Rating: * Poor Excellent
Your Name *: Email (private) *:




In Celiac.com's Forum Now:

All Activity
Celiac.com Celiac Disease & Gluten-Free Diet Forum - All Activity

I believe the talk around this forum is that cheerios are not gluten free enough for people with celiac at this time. I don't know if anything has changed on that and when their lawyer calls me I'll quickly delete this. haha

Could be we generally say get off of dairy for a few months when going gluten free. The part of the intestines that produce the enzymes, and help break down dairy are associated with the tips of the villi, which are the most damaged if not gone in celiacs. THIS is why most of us end up with a lactose intolerance early on. And most can introduce it later after healing. As to her symptoms with it there was a bunch of research about dairy permeated the gut and causing neurological issues in a autism study I was looking at years ago. And there have been other studies about damaged intestines and how the hormones in milk can easier effect ones body. Personally I also have a huge grudge against dairy on a personal level as it is not natural to suck on a cows tits and drink the stuff, nor your dogs, nor a rabbits......I mean come on even Human Breast milk you would find odd to drink as an adult right? Back in the past dairy was a great way to get calories and fats when there was famine, etc around I mean it is meant to make a calf grow into a 500+lb cow. But on a genetic and hormonal level it is not really for human consumption and now days the whole corporate BS propaganda push and dairy farms shove that oh its healthy stuff down your throat. There are plenty of dairy free options for everything feel free to message me if you need help finding anything I have been dairy free for over a decade.

The full celiac panel checks TTG IGA and IGG, DGP IGA and IGG, IGA, EMA as Jmg stated above. Your test included TTG IGA and IGA. If your IGA was low, a low on TTG IGA would be inconclusive. But your IGA is fine. A high on any one test is a positive for celiac and should lead to an endoscopy for confirmation. So I'd get tested for TTG IGG, DGP IGA and IGG and EMA since there are symptoms. Warning I'm not a doc.

I did a gluten challenge for my endoscopy and requested a second blood test after my follow up with the consultant. I never did see those results but my GP said no celiac was indicated: Which left me gluten free for life, that wasn't an option after the challenge, but with a less satisfactory diagnosis, one by omission rather than the definitive 'you're celiac' one I was expecting. Yes! I have been 'properly' glutened on a couple of occasions but on several more I've detected a change or a reaction based on what could only have been trace amounts. NCGS is as yet poorly understood but patients tend to have more neuro symptoms than digestive. That's definitely been my experience, although it was only after going gluten free that I realised quite how many digestive symptoms I had just been living with as 'normal'. Close friends and family get the full explanation. 'I have an auto immune disease similar to 'coeliac etc.' If they stay awake long enough I'll tell them about the less than perfect testing process I went through or the Columbia Med research and the possibility of a blood test soon. They can see the difference between me on gluten and off it so they understand its not all in my head* If I'm ordering food in a restauarant or asking questions about food prep etc I will often just self declare as coeliac - people are aware of that and understand those requests are medical rather than fad diet based. I don't have any problem doing this, I'm not going to claim that and then cheat on dessert for instance and to be honest I expect once the research is complete the two conditions may wind up alongside others as different faces of the same coin. In the meantime I safeguard my health and avoid getting into a detailed conversation about genuine gluten sensitivity versus faux hipster posturing! *apart from the bits which are in my head

I originally had it on my face and scalp. (22 years ago) First biopsy with dermatologist came back as folliculitis. Then when I had a new outbreak on my upper back, she was able to remove a nice clean blister and we got the diagnosis of DH. She started me on Dapsone (100mg/day) and gluten free diet. Now I take 25-50 mg/day. My understanding at the time was that DH was the skin version of Celiac. Did a lot of research on my own. I met Dr. Peter Green at a Gluten free Vendors Fair and he said that a diagnosis of DH IS a diagnosis of Celiac, even if no other symptoms. So I stay gluten-free