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Dgp Meaning Needed In Easy To Understand Terms
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Started by powerofpositivethinking,

2 posts in this topic

Posted

can anyone explain what exactly it means when the gliadin peptide becomes deamidated?  what causes this?  all the scientific wording I keep finding is too confusing for me to really understand the concept, so simple terms would be much appreciated  :rolleyes:  thanks!

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Posted

It is pretty hard to do in layman's terms (not that I could do it myself anyway :P )  The following abstract is not too "abstract" or technical and might allow you to get the gist of it:

 

http://www.ncbi.nlm.nih.gov/pubmed/17682339

 

Celiac disease (celiac disease) is an (auto)immunologically mediated intestinal intolerance against proteins from wheat (gluten) and related cereal proteins. Tissue transglutaminase (tTG) has been identified as the autoantigen in celiac disease. Although ultimate diagnosis is based on histological analysis of small intestinal mucosa obtained via tissue biopsy, assessment of autoantibodies can provide substantial help in the evaluation of celiac disease. Gliadin antibodies are directed against the native disease-provoking cereal proteins. Despite their initial usefulness, these antibodies have lost diagnostic importance due to their poor specificity and sensitivity as celiac disease markers. Recently, it was found, however, that gliadin antibodies from sera of patients with active celiac disease preferentially recognized deamidated gliadin peptides. The use of deamidated gliadin peptides in immunoassays has significantly improved the usefulness of gliadin antibodies in diagnosis of celiac disease to that observed with autoantibody assay methods (endomysium antibodies, antibodies against tTG). The antibody epitopes (B-cell epitopes) reflect substrate specificity of tTG and resemble peptide sequences known to be strongly T-cell stimulatory (T-cell epitopes) in celiac disease. The assay applying deamidated gliadin peptides measures a new species of antibodies, which is different from conventional gliadin antibodies as well as from autoantibodies and will likely provide new information on pathophysiological mechanisms of celiac disease.

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Go To Topic Listing Celiac Disease - Pre-Diagnosis, Testing & Symptoms

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    • squirmingitch
      Hello new here. I think I may have Celiac Disease

      By squirmingitch · Posted

      You're welcome! Yes, I too, hate waiting for lab results. Ugh!
    • yams88
      Do these seem like Celiac disease symptoms?

      By yams88 · Posted

      I understand this is not a doctor's office and that I need proper testing done to rule out Celiac disease, however, I am stuck waiting until November to even see a GI doctor. So I need some suggestions soon on which test to go for first and what to do as I wait. Also do note, I am 28 years old.

      Right now, the most suspecting culprits to my symptoms have been Gallbadder, Celiac disease, and IBS. I have also been recently diagnosed with pre-diabetes and I am obese.  My Ultrasound and CT scan have all come up as normal and no signs of gallstones. However, I was in extreme pain as my upper abdomen was examined during the ultra sound. My white blood cell count also seems to be high at 12,000 but all blood work came back normal for liver and everything else.

      Symptoms included are: diarrhea
      yellow-stools (Sometimes foul smelling but always sink)
      light gnawing pain in area a few inches above belly button
      burning in chest
      sometimes pain below upper right rib cage.
      Tenderness all around the upper abdomen, but more so on the right and center.
      burping frequently after meals
      Gassy
      bloating in abdomen The pains used to come and go for the past few years as something very mild, but then the yellow stools happen at least four months ago and at a constant rate. Everyday it is either yellow or orange.  Sometimes the stools are lose and other times they are not. Two months in, I was finally diagnosed with pre-diabetes and have been having a strict low calorie and non fatty diet.

      So far the upper right pain has subsided but the pain above my belly button would continue. The gassy and bloated feeling would come and go as well. I get severe heart burn after almost every meal. But I felt it especially after eating whole wheat sandwiches or whole wheat pasta. I however don't feel it when I eat a Nature Valley granola bar, or pack of peanut butter crackers. I also had a chicken and vegetable stir fry with soy sauce cooked in that also had little effect on me. A bowl of cereal also made the heart burn act up pretty bad. I sometimes feel numb or light headed after various meals. Especially larger ones. In fact, it seems the more I eat, the worse I feel. But the less in the stomach, the more the pain above my belly button starts to act up.

      It is usually in the morning and afternoon I feel the most with gas and bloating. Especially after any large meals from the previous day. Despite the diet and work outs I have had, nothing has changed the stools. However, taking fish oil pills has greatly reduced the pain in my upper abdomen as well as the pain  in the the area above my belly button. My question now is, is there a very likely chance of this being celiac disease? Should I go on a gluten free diet to test since I Have to wait so long? Also, which test should I ask the doctor for first, as it will take a GREAT deal of time to pay off each one. Colonoscopy, HIDA scan, or endoscopy. 

      Again, I understand this isn't a site to get compete medical advice or to know exactly what my illness is, but I am trying to narrow down the possibility or what is most likely. If this has a chance of being celiac disease, I would rather know sooner than later.
    • pablito
      Hello new here. I think I may have Celiac Disease

      By pablito · Posted

      Thank you very much for all the info Squirmingitch. The doctor told me as we were talking he was going to order some tests with urine so I don't know why he didn't mark that. Maybe he forgot as we were talking? Duly noted about the bladder Cancer to watch out for too. Doctor said it will take about a week to get the lab results back usually from this lab. The wait will seem like forever I'm sure. Yes I will press to have the other tests done too if this one comes back negative.
    • squirmingitch
      Potential Celiac Diagnosis?

      By squirmingitch · Posted

      http://www.cureceliacdisease.org/screening/ Was your hubs tested for total IgA to see if he's IgA deficient? Read this thread: http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/83660
    • squirmingitch
      Hello new here. I think I may have Celiac Disease

      By squirmingitch · Posted

      Yes, bone density problems are all part of the celiac "umbrella" so to speak and yes, osteoporosis tends to happen more rapidly and at earlier ages than normal when malabsorption is happening. At age 43, it's not normal to have osteoporosis as you describe so that's another part of the jigsaw puzzle. Time to receive blood test results back from the doc are entirely dependent on the particular lab they were sent to. Yep, it's time for you to start keeping a very close check on the PSA in light of your father having had prostrate cancer. I would think you should get a PSA every year. I really would have liked to see him do a urinalysis. With the prostrate cancer your father had, it would seem a close watch should be kept on you for bladder cancer as well. The first symptom of that is blood in the urine but it's generally microscopic before you're ever able to actually see it. That happens to be the 8th most common cancer in men & it's moving up in the rankings. I know this because my hubs had it. The good news is that it's also one of the easiest and most successfully treated provided it's caught early. Certainly starting @ age 50, men should see a urologist every year. BTW, in the last year before I found out I was celiac, I turned up with microscopic blood in my urine. I got it checked out thoroughly since I know about bladder cancer & all tests, ultrasounds, cystoscopy, CT scan etc... turned out fine. The docs were stumped & finally said, "apparently that's just what your body does". Guess what? That's not "just" what MY body does. Once I went gluten-free, I have had no more microscopic blood in my urine. Interesting eh? Before now I didn't realize you are in Canada. The doc didn't do the full celiac panel but I understand the initial screening protocols in Canada only order the TTG but if that comes back negative be sure & press for the full panel as cyclinglady said. We have several here who tested like cyclinglady so it's not a rare thing, it's just not the norm. I'm glad he's doing the B-12 & Ferritin -- those can be big clues.

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