47 In vitro cytotoxic effect of wheat gliadin-derived peptides on the Caco-2 intestinal cell line is associated with intracellular oxidative imbalance: implications for celiac disease - Celiac.com
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In vitro cytotoxic effect of wheat gliadin-derived peptides on the Caco-2 intestinal cell line is associated with intracellular oxidative imbalance: implications for celiac disease

Authors Rivabene R. Mancini E. De Vincenzi M.
Source Biochimica et Biophysica Acta - Molecular Basis of Disease. 1453(1):152-160, 1999 Jan 6.

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Abstract: Coeliac disease (celiac disease) is an inflammatory disorder of the upper small intestine in which gluten acts as an essential factor in its pathogenesis. Although it is generally accepted that cereal protein activation of the immune system is involved in celiac disease progression, a non-immunomediated cytotoxic activity of gliadin-derived peptides on the jejunal/duodenal tract cannot be excluded. In this work, considering that (a) little has been reported about the intracellular metabolic events associated with gliadin toxicity, and (b) an important role for free radicals in a number of gastrointestinal disease has been demonstrated, we investigated the in vitro effects of gliadin-derived peptides on redox metabolism of Caco-2 intestinal cells during a kinetic study in which cells were exposed to peptic-tryptic digest of bread wheal up to 48 h. We found that the antiproliferative effects displayed by gliadin exposure was associated with intracellular oxidative imbalance, characterized by an increased presence of lipid peroxides, an augmented oxidized (GSSC)/reduced (GSH) glutathione ratio and a loss in protein-bound sulfhydryl groups. Significant structural perturbations of the cell plasma membrane were also detected. Additional experiments performed by using the specific GSH-depleting agent buthionine sulfoximine provide evidence that the extent of gliadin-induced cell growth arrest critically depends upon the basal redox profile of the enterocytes. On the whole, these findings seem to suggest that, besides the adoption of a strictly gluten-free diet, the possibility for an adjuvant therapy with antioxidants may be considered for celiac disease patients. (C) 1999 Elsevier Science B.V. All rights reserved. [References: 38]

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Wish I could give you a hug. Unfortunately I know how that feels with Neurologists, Internists, Endocrinologists, Rheumatologists, GIs..... I got so tired of crying my drive home after refusing yet another script for Prozac. I do hope your GI can give you some answers even if it is just to rule out other possible issues. Keep on the gluten and we are here for you.

It is too bad that so often a full panel isn't done. Glad your appointment got moved up and hopefully you will get a clearer answer from the GI. Do keep eating gluten until the celiac testing is done. Once the testing is done do give the diet a good strict try. Hang in there.

That makes sense...I cried with relief when I got my diagnosis just because there was finally an answer. Please know that you are not weak or crazy. Keep pushing for testing. It could still be celiac, it could be Crohns. Push your Dr's to figure this out. Best wishes.

Thank you all very much. I actually cried when I got the answer. I wanted an explanation that I could "fix." Now I'm back to thinking I'm just weak and possibly crazy. I know I'm not crazy, but you know.

From what I have read online there is about a 1-3% chance of getting a false positive for celiac disease from a blood test. Was it a blood test that you got done? It may be worth your while to get a biopsy or more testing just to confirm it. I know being gluten free is a pain but it is better than getting cancer or other auto immune disorders.