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Dna Test Advice


ChristineSelhi

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ChristineSelhi Rookie

Hi All,

I got a DNA test back in 2004 that told me I was nonceliac. I just called to get the test results to really understand what the diagnosis was, because I have been gluten free ever since, and have had a number of nurses and doctors tell me that I still exhibit symptoms of the disease.

I tested negative for DQ2 and DQ8. Does this mean I do not have celiac? Also, I have heard a couple of different things about the percentage of people with celiac disease who have these genes. I have heard anything from 85%-99%. Any words of wisdom?


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cassP Contributor

DQ2s and DQ8s make up the majority from what ive read, they're considered the "classic" genes... but just because you dont have those 2, doesnt mean you cant have celiac!

there's members on this forum with celiac and different genes. from what ive read, there's like 27 DQ genes that are linked to gluten sensitivity/intolerance. and it seems as tho doctors in Europe are ahead of the game as far as recognizing other DQ genes in Celiac.

but also, too, the genes are only part of it-

did you also get any antibodies tests?? or just the genes?

Kay DH Apprentice

I have a different issue. I have the HLA-DQ8 genetic marker, and oodles of symptoms that went away once I went gluten-free last fall. My celiac panel and endoscopy biopsy were negative for celiac, although the tests were flawed. Not all people diagnosed with celiac have HLA-DQ2 or DQ8; as the previous poster indicated, there are other probable genetic markers. There is very little research that has been conducted on celiac and gluten sensitivity. The symptoms are so varied and complex that it is very likely the genetic imprint is as well. It is frustrating not having a diagnosis, but it is important to trust how your body feels. The FDA just approved a new test for celiac that hopefully is more accurate than most of the current ones, especially for those of us that are gluten-free and will not do the gluten challenge.

ChristineSelhi Rookie

I had already started the gluten free diet by the time I could have any antibody tests done. I am so sensitive that I break out from just crumbs on a stick of butter, and I get sick for days from small CC, so I wasn't willing to go back on. So, I guess I have to live with what I got. Either way, I don't eat gluten. Thanks for your reply!

Coconut's mom Newbie

Can someone tell me where to get this DNA test?

Skylark Collaborator

Can someone tell me where to get this DNA test?

If your insurance covers it your doctor can order it, but please understand that the genetic test is not diagnostic for celiac. It also does not rule it out. We don't know enough about the genetics yet, or what triggers celiac in people with the genes we think are involved. All that's known is that certain HLA-DQ alleles confer somewhat more risk for celiac disease than others.

Open Original Shared Link offers testing as does Open Original Shared Link I think you can also order it from Kimball. Open Original Shared Link They test for different subsets of the celiac genes, so you might read up some on the tests and decide what you want to know before you order.

  • 2 months later...
salexander421 Enthusiast

The FDA just approved a new test for celiac that hopefully is more accurate than most of the current ones, especially for those of us that are gluten-free and will not do the gluten challenge.

What is this test called??


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    • trents
      NCGS does not cause damage to the small bowel villi so, if indeed you were not skimping on gluten when you had the antibody blood testing done, it is likely you have celiac disease.
    • Scott Adams
      I will assume you did the gluten challenge properly and were eating a lot of gluten daily for 6-8 weeks before your test, but if not, that could be the issue. You can still have celiac disease with negative blood test results, although it's not as common:  Clinical and genetic profile of patients with seronegative coeliac disease: the natural history and response to gluten-free diet: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5606118/  Seronegative Celiac Disease - A Challenging Case: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9441776/  Enteropathies with villous atrophy but negative coeliac serology in adults: current issues: https://pubmed.ncbi.nlm.nih.gov/34764141/  Approximately 10x more people have non-celiac gluten sensitivity than have celiac disease, but there isn’t yet a test for NCGS. If your symptoms go away on a gluten-free diet it would likely signal NCGS.
    • Xravith
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    • Scott Adams
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    • Scott Adams
      In the Europe the new protocol for making a celiac disease diagnosis in children is if their tTg-IgA (tissue transglutaminase IgA) levels are 10 times or above the positive level for celiac disease--and you are above that level. According to the latest research, if the blood test results are at certain high levels that range between 5-10 times the reference range for a positive celiac disease diagnosis, it may not be necessary to confirm the results using an endoscopy/biopsy: Blood Test Alone Can Diagnose Celiac Disease in Most Children and Adults TGA-IgA at or Above Five Times Normal Limit in Kids Indicates Celiac Disease in Nearly All Cases No More Biopsies to Diagnose Celiac Disease in Children! May I ask why you've had so many past tTg-IgA tests done, and many of them seem to have been done 3 times during short time intervals?    
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