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    Can Understanding Clonal T Cell Receptor Gene Rearrangements Improve Refractory Celiac Diagnosis?


    Jefferson Adams


    • Researchers suspect that better understanding of clonal T cell receptor gene rearrangements may help researchers to improve diagnosis of refractory celiac disease, a rare complication of celiac disease that has high death rates.


    Image Caption: Image: CC--NIAID

    Celiac.com 06/14/2018 - Refractory celiac disease type II (RCDII) is a rare complication of celiac disease that has high death rates. To diagnose RCDII, doctors identify a clonal population of phenotypically aberrant intraepithelial lymphocytes (IELs). 


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    However, researchers really don’t have much data regarding the frequency and significance of clonal T cell receptor (TCR) gene rearrangements (TCR-GRs) in small bowel (SB) biopsies of patients without RCDII. Such data could provide useful comparison information for patients with RCDII, among other things.

    To that end, a research team recently set out to try to get some information about the frequency and importance of clonal T cell receptor (TCR) gene rearrangements (TCR-GRs) in small bowel (SB) biopsies of patients without RCDII. The research team included Shafinaz Hussein, Tatyana Gindin, Stephen M Lagana, Carolina Arguelles-Grande, Suneeta Krishnareddy, Bachir Alobeid, Suzanne K Lewis, Mahesh M Mansukhani, Peter H R Green, and Govind Bhagat.

    They are variously affiliated with the Department of Pathology and Cell Biology, and the Department of Medicine at the Celiac Disease Center, New York Presbyterian Hospital/Columbia University Medical Center, New York, USA. Their team analyzed results of TCR-GR analyses performed on SB biopsies at our institution over a 3-year period, which were obtained from eight active celiac disease, 172 celiac disease on gluten-free diet, 33 RCDI, and three RCDII patients and 14 patients without celiac disease. 

    Clonal TCR-GRs are not infrequent in cases lacking features of RCDII, while PCPs are frequent in all disease phases. TCR-GR results should be assessed in conjunction with immunophenotypic, histological and clinical findings for appropriate diagnosis and classification of RCD.

    The team divided the TCR-GR patterns into clonal, polyclonal and prominent clonal peaks (PCPs), and correlated these patterns with clinical and pathological features. In all, they detected clonal TCR-GR products in biopsies from 67% of patients with RCDII, 17% of patients with RCDI and 6% of patients with gluten-free diet. They found PCPs in all disease phases, but saw no significant difference in the TCR-GR patterns between the non-RCDII disease categories (p=0.39). 

    They also noted a higher frequency of surface CD3(−) IELs in cases with clonal TCR-GR, but the PCP pattern showed no associations with any clinical or pathological feature. 

    Repeat biopsy showed that the clonal or PCP pattern persisted for up to 2 years with no evidence of RCDII. The study indicates that better understanding of clonal T cell receptor gene rearrangements may help researchers improve refractory celiac diagnosis. 

    Source:

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  • About Me

    Jefferson Adams is a freelance writer living in San Francisco. He has covered Health News for Examiner.com, and provided health and medical content for Sharecare.com. His work has appeared in Antioch Review, Blue Mesa Review, CALIBAN, Hayden's Ferry Review, Huffington Post, the Mississippi Review, and Slate, among others.

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  • Related Articles

    Jefferson Adams
    Celiac.com 01/14/2011 - Researchers recently presented information at the American College of Gastroenterology that indicates that more people with celiac disease might stop responding to gluten-free diets. Their new study, in the form of a retrospective chart review, turned up 17 cases of refractory celiac disease, each of which was eventually treated successfully with thiopurines.
    Researchers Christopher Hammerle, MD, and Sheila Crowe, MD, of the University of Virginia in Charlottesville, reported the results at a meeting at the American College of Gastroenterology. Hammerle called thiopurines her "treatment-of-choice for refractory celiac disease to avoid long-term steroids." The researchers stated that refractory disease appear to be on the rise. Patients with refractory celiac disease have recurrent symptoms such as abdominal pain, severe malabsorption, and intestinal damage.
    While some people note that refractory sprue might be caused by non-compliance to the gluten-free diet, current guidelines for treating refractory sprue call for doctors to review the dietary compliance of their patients, and to press for stricter adherence, and to search for other triggers of non-responsiveness only once dietary adherence issues are ruled out. In order to best understand the natural history of the celiac disease and to establish best practices for treatment, the researchers examined non-responsive celiac patients who had been seen at the University of Virginia Medical Center over the previous 10-year period.
    They found 17 such patients; 16 of whom had intraepithelial lymphocytes, four with the polyclonal phenotype and 12 with the monoclonal phenotype. One patient was untyped, while five patients also suffered autoimmune disease. The average age for diagnosis of a polyclonal phenotype was 45 years, and for the monoclonal phenotype mean age at diagnosis was 59. Overall, patients received a diagnosis of refractive disease an average of 4.7 years after receiving their diagnosis of celiac disease.
    According to the data, diagnosis for refractive celiac disease seems to be happening more recently, with all but one diagnosis happening in the last five years, and 41% diagnosed within six months of the researchers report. Every patient diagnosed with refractive celiac disease showed evidence of malabsorption, while 71% suffered from iron deficiency Anemia, 59% suffered hypo-albuminuria, 47% had osteoporosis and 24% showed elevated liver enzymes.
    According to Dr. Hammerle, steroids are the most common treatment choice for truly refractive disease. Indeed, more than four out of five refractory celiac patients (82%) first received corticosteroid treatment, but two patients went on to become steroid-dependent. Instead, Hammerle prefers to treat refractory celiac disease patients with a thiopurine. Of 14 of patients who received a thiopurine, all but one showed a notable improvement in symptoms.
    Hammerle notes that, while diagnosis for refractory disease seems to be rising, celiac disease itself is still widely underdiagnosed. Brandt concurs, noting that people with undiagnosed celiac disease, or even persistent celiac disease, can develop serious complications, including lymphoma. In people with celiac disease, this can result from increased production of cytokines, including IL-15, Hammerle said, which promote the creation of T-cells that can turn malignant.
    Source:

    American College of Gastroenterology. Hammerle C, Crowe S "Natural history and treatment of refractory celiac disease: Experience with 17 patients at a single center" ACG 2010; Abstract 235.

    Jefferson Adams
    Celiac.com 01/04/2013 - Currently, doctors must still use invasive techniques to distinguish between uncomplicated and complicated forms of celiac disease.
    In an effort to find a non-invasive approach to the issue, a research team recently set out to investigate the potential use of novel serum parameters, including IL-6, IL-8, IL-17, IL-22, sCD25, sCD27, granzyme-B, sMICA and sCTLA-4 in patients diagnosed with active celiac disease, celiac disease on a GFD, Refractory coeliac disease (RCD) type I and II, and enteropathy associated T-cell lymphoma (EATL).
    The research team included Greetje J. Tack, Roy L. van Wanrooij, B. Mary Von Blomberg, Hedayat Amini, Veerle M. Coupe, Petra Bonnet, Chris J. Mulder and Marco W. Schreurs.
    Their investigation revealed elevated levels of the pro-inflammatory IL-8, IL-17 and sCD25 in both active celiac disease and in refractory celiac disease, types I and II.
    They also found that RCDII patients displayed higher serum levels of soluble granzyme-B and IL-6 in comparison to active celiac disease patients. Furthermore, EATL patients showed higher levels of IL-6 as compared to all other groups. Otherwise, the team found no differences between RCDI and active celiac disease or RCDII.
    These novel serum parameters show distinct immunological differences in RCDII and EATL, compared with uncomplicated celiac disease and RCDI.
    Source:
    BMC Gastroenterology 2012, 12:159. doi:10.1186/1471-230X-12-159

    Jefferson Adams
    Celiac.com 10/27/2014 - There have been a few reports tying cortical myoclonus with ataxia to celiac disease. Such reports also suggest that the former is unresponsive to a gluten-free diet.
    A team of researchers recently set out to determine if there is any significant connection between the two conditions. The research team included Ptolemaios G. Sarrigiannis, Nigel Hoggard, Daniel Aeschlimann, David S. Sanders, Richard A. Grünewald, Zoe C. Unwin, and Marios Hadjivassiliou.
    They are variously associated with the Departments of Gastroenterology, Neurology, Neurophysiology and Neuroradiology at Royal Hallamshire Hospital, in Sheffield, UK, and with the College of Biomedical and Life Sciences at Cardiff University in Cardiff, UK.
    The team presented detailed electro-clinical characteristics of a new syndrome of progressive cortical hyperexcitability with ataxia and refractory celiac disease. Regular follow ups of over 600 patients with neurological manifestations due to gluten sensitivity revealed 9 patients with this syndrome.
    They found that all nine patients, six men and three women, experienced asymmetrical irregular myoclonus involving one or more limbs and sometimes face. This was often stimulus sensitive and became more widespread over time. Three patients had a history of Jacksonian march, and five had at least one secondarily generalized seizure. Electrophysiology showed evidence of cortical myoclonus. Three showed a phenotype of epilepsia partialis continua at onset.
    All patients showed clinical, imaging and/or pathological evidence of cerebellar involvement. All patients followed a strict gluten-free diet, and most successfully eliminated gluten-related antibodies. However, all patients still showed evidence of enteropathy, suggests that refractory celiac disease is to blame.
    During the study, two patients died from enteropathy-associated lymphoma and one from status epilepticus. Five patients were treated with mycophenolate and one in addition with rituximab and IV immunoglobulins. These patients showed improvement of ataxia and enteropathy, but continued to suffer the effects of myoclonus.
    These results indicate that myoclonus ataxia might be the most common neurological manifestation of refractory celiac disease.
    The clinical involvement, apart from ataxia, covers the whole clinical spectrum of cortical myoclonus.
    Source:
    Cerebellum & Ataxias 2014, 1:11. doi:10.1186/2053-8871-1-11

    Jefferson Adams
    Celiac.com 08/16/2016 - Celiac disease changes the composition and differentiation potential of the duodenal intraepithelial innate lymphocyte compartment, specifically, the composition and function of duodenal intraepithelial T cells.
    The intestinal tract is also home to four types of CD3-negative intraepithelial lymphocytes (IELs) with largely unknown function: CD56(-)CD127(-); CD56(-)CD127(+); CD56(+)CD127(-) and CD56(+)CD127(+).
    A team of researchers wanted to gain insight into the potential function of these innate IELs in health and disease. Specifically, they wanted to assess how the composition and differentiation potential of the duodenal intraepithelial innate lymphocyte compartment is altered in celiac disease.
    The research team included F Schmitz, Y Kooy-Winkelaar, AS Wiekmeijer, MH Brugman, ML Mearin, C Mulder, S Chuva de Sousa Lopes, CL Mummery, FJ Staal, J van Bergen, F Koning. They are variously affiliated with the Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands, the Department of Immunohematology and Blood Transfusion at Leiden University Medical Center in Leiden, The Netherlands, the Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands, the Department of Gastroenterology at the Free University Medical Center, Amsterdam, The Netherlands, and with the Department of Anatomy and Embryology at Leiden University Medical Center in Leiden, The Netherlands.
    For their study, the team measured the phenotypes, relative abundance and differentiation potential of these innate IEL subsets in duodenal biopsies from controls and patients with celiac disease or patients with refractory celiac disease type II (RCDII).
    Hierarchical clustering analysis of the expression of 15 natural killer and T cell surface markers showed that innate IELs differed markedly from innate peripheral blood lymphocytes and divided innate IEL subsets into two main branches: a CD127(-) branch expressing high levels of interleukin (IL) 2/15Rβ but no IL-21R, and a CD127(+) branch with the opposite phenotype. While celiac disease was characterized by the contraction of all four innate IEL subsets, a selective expansion of CD56(-)CD127(-) and CD56(-)CD127(+) innate IEL was detected in RCDII.
    In vitro, in the presence of IL-15, CD56(-)CD127(-) IEL from controls and patients with celiac disease differentiated into functional natural killer and T cells, the latter largely dependent on notch-signaling. This did not occur in patients with RCDII. Furthermore, compared with non-celiac controls, CD56(-)CD127(-) IEL from patients with celiac disease expressed more intracellular CD3ε and CD3γ and gave more pronounced T cell differentiation.
    RCDII changes the normally diverse and plastic innate IEL compartment, and encourages a loss of differentiation potential.
    Source:
    Gut. 2016 Aug;65(8):1269-78. doi: 10.1136/gutjnl-2014-308153.

  • Recent Articles

    Jefferson Adams
    Celiac.com 07/17/2018 - What can fat soluble vitamin levels in newly diagnosed children tell us about celiac disease? A team of researchers recently assessed fat soluble vitamin levels in children diagnosed with newly celiac disease to determine whether vitamin levels needed to be assessed routinely in these patients during diagnosis.
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    Vitamin A and vitamin D levels for celiac patients were significantly lower than the control group. Vitamin A and vitamin D deficiencies were significantly more common compared to healthy subjects. Nearly all of the celiac patients showed vitamin D insufficiency, while nearly 62% showed vitamin D deficiency. Nearly 33% of celiac patients showed vitamin A deficiency. 
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    Children with newly diagnosed celiac disease showed significantly reduced levels of vitamin D and A. The team recommends screening of vitamin A and D levels during diagnosis of these patients.
    Source:
    BMC Pediatrics

    Jefferson Adams
    Celiac.com 07/16/2018 - Did weak public oversight leave Arizonans ripe for Theranos’ faulty blood tests scam? Scandal-plagued blood-testing company Theranos deceived Arizona officials and patients by selling unproven, unreliable products that produced faulty medical results, according to a new book by Wall Street Journal reporter, whose in-depth, comprehensive investigation of the company uncovered deceit, abuse, and potential fraud.
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    According to Carreyrou, Theranos’ lies and deceit made Arizonans into guinea pigs in what amounted to a "big, unauthorized medical experiment.” Even though founder Elizabeth Holmes and Theranos duped numerous people, including seemingly savvy investors, Carreyrou points out that there were public facts available to elected officials back then, like a complete lack of clinical data on the company's testing and no approvals from the Food and Drug Administration for any of its tests.
    SEC recently charged the now disgraced Holmes with what it called a 'years-long fraud.’ The company’s value has plummeted, and it is now nearly worthless, and facing dozens, and possibly hundreds of lawsuits from angry investors. Meantime, Theranos will pay Arizona consumers $4.65 million under a consumer-fraud settlement Arizona Attorney General Mark Brnovich negotiated with the embattled blood-testing company.
    Both investors and Arizona officials, “could have picked up on those things or asked more questions or kicked the tires more," Carreyrou said. Unlike other states, such as New York, Arizona lacks robust laboratory oversight that would likely have prevented Theranos from operating in those places, he added.
    Stay tuned for more new on how the Theranos fraud story plays out.
    Read more at azcentral.com.

    Jefferson Adams
    Celiac.com 07/14/2018 - If you’re looking for a simple, nutritious and exciting alternative to standard spaghetti and tomato sauce, look no further than this delicious version that blends ripe plum tomatoes, garlic, olive oil, basil, and firm sliced ricotta to deliver a tasty, memorable dish.
    Ingredients:
    12 ounces gluten-free spaghetti 5 or 6 ripe plum tomatoes ¼ cup extra virgin olive oil 2 cloves garlic, crushed ¾ teaspoons crushed red pepper ¼ cup chopped fresh basil 2 tablespoons chopped fresh parsley Kosher salt and black pepper ⅓ cup pecorino Romano cheese, grated ½ cup firm ricotta, shaved with peeler Directions:
    Finely chop all but one of the tomatoes; transfer to large bowl with olive oil and ¼ teaspoon salt.
    Cook spaghetti until al dente or desired firmness, and drain, reserving ¼ cup cooking water. 
    Meanwhile, chop remaining tomato, and place in food processor along with garlic, red pepper, and ½ teaspoon salt; puree until smooth. 
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    Add cooked spaghetti, basil and parsley to a large bowl.
    Toss in tomato mixture, adding some reserved pasta water, if needed. 
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    Jean Duane
    Celiac.com 07/13/2018 - I went to a friend’s home for dinner.  A few days before, she called and asked me what I could eat.  I asked her what she was planning to make, and she said she was grilling meats with side dishes.  I said, “Great.  Please just grill a piece of chicken for me with salt and pepper, and I’ll be happy to bring a side.” She said, “No need to bring a side.  I’ve got this.” When I arrived, she greeted me and said, “I spent all day cooking tonight’s dinner so you can eat it. Hey would you just check this salad dressing to see if it is OK for you?” I looked at the ingredients and it contained gluten and dairy, both of which I cannot eat.  Then I glanced around the kitchen and saw evidence of wheat cross-contamination, including buns being toasted on the grill, and gluten-containing barbeque sauce spilling on the grill where my “clean” chicken was cooking. She had other guests to tend to, and I couldn’t offer instruction or read the ingredients of everything she used in the meal. 
    At social gatherings, I’ve been challenged too by those who ask if I am really “allergic,” or just eating gluten free as a “fad.” I’ve been told many times by hosts and hostesses that, “a little won’t hurt you,” or “everything in moderation,” or “if it is made with loving hands, it is good for you to eat.”  Of course, all of this is bunk for those with food allergies or celiac disease.  A little bit may kill us, and whether made with loving hands or not, it will certainly make us sick. 
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    Etiquette books advise us to eat what is put in front of us when we are guests in someone’s home. They caution us at all costs not to insult our hostess. Rather, we are instructed to compliment the hostess on her good cooking, flavor combinations, and food choices.  But when foods are prepared in a cross-contaminated environment with ingredients we are allergic to, we cannot follow the old social constructs that do not serve us.  We need to work together to rewrite the rules, so that we can be included in social gatherings without fear of cross-contamination, and without offending anyone.
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    Each edition of this column will present a scenario, and together, we’ll determine appropriate, polite, and most importantly, safe ways to navigate this tricky gluten-free/food allergies lifestyle in a graceful way.  If someone disagrees with our new behavior patterns, we can refer them to this column and say, “Here are the new rules for those of us with food allergies or celiac disease.”  When we are guests in someone’s home, we can give them links to this column so they understand the plight we are faced with, bite after bite. Perhaps this will help those of us living with us to understand, be more compassionate, and accepting of our adaptations to keep ourselves safe. 
    This column will present a scenario such as the one above, and ask that you comment on how you would navigate it. Let’s talk about it. Let’s share ideas.  Using the example above, here’s the scenario for this issue:
    What would you do?
    Your kind-hearted friend invites you to dinner and insists on cooking for you.  You arrive and the first thing she says is, “I’ve spent all day making this for you. Oh, I bought this salad dressing for you, but you might want to read the ingredients first.”  You do, and it contains malt vinegar.  You look around the kitchen and notice evidence of cross-contamination in the rest of the meal.  What do you do? 
    Please comment below and feel free to share the tricky scenarios that you’ve encountered too.  Let’s discuss how to surmount these social situations.  What would you do?

    Jefferson Adams
    Celiac.com 07/12/2018 - Previous research has shown that the oral administration of Bifidobacterium infantis Natren Life Start super strain (NLS-SS) reduces of gastro-intestinal symptoms in untreated celiac disease patients. The reduction of symptoms was not connected with changes in intestinal permeability or serum levels of cytokines, chemokines, or growth factors. Therefore, researchers suspected that the reduction of symptoms might be related to the modulation of innate immunity.
    To test that hypothesis, a team of researchers set out to assess the potential mechanisms of a probiotic B.infantis Natren Life Start super strain on the mucosal expression of innate immune markers in adult patients with active untreated celiac disease compared with those treated with B. infantis 6 weeks and after 1 year of gluten-free diet.
    The research team included Maria I. Pinto-Sanchez, MD, Edgardo C. Smecuol, MD, Maria P. Temprano,RD, Emilia Sugai, BSBC, Andrea Gonzalez, RD, PhD, Maria L. Moreno,MD, Xianxi Huang, MD, PhD, Premysl Bercik, MD, Ana Cabanne, MD, Horacio Vazquez, MD, Sonia Niveloni, MD, Roberto Mazure, MD, Eduardo Mauriño, MD, Elena F. Verdú, MD, PhD, and Julio C. Bai, MD. They are affiliated with the Medicine Department, Farcombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada; the Small Intestinal Section, Department of Medicine and the Department of Alimentation at Dr. C. Bonorino Udaondo, Gastroenterology Hospital and Research Institute at the Universidad del Salvador in Buenos Aires, Argentina.
    The team determined the numbers of macrophages and Paneth cells, along with the expression of a-defensin-5 expression via immunohistochemistry in duodenal biopsies.
    Their results showed that a gluten-free diet lowers duodenal macrophage counts in celiac disease patients more effectively than B. infantis, while B. infantis lowers Paneth cell counts and reduces expression of a-defensin-5.
    This study documents the differential innate immune effects of treatment with B. infantis compared with 1 year of gluten-free diet. The team calls for further study to better understand the synergistic effects of gluten-free diet and B. infantis supplementation in celiac disease.
    Source:
    J Clin Gastroenterol