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Emergence of Celiac Disease and Gluten-related Disorders in Asia
( Srikant Mohta ),( Mahendra S Rajput ),( Vineet Ahuja ),( Govind K Makharia ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2021 Journal of Neurogastroenterology and Motility (JNM Vol.27 No.3
Celiac disease (CeD) is a systemic, immune-mediated enteropathy, which is triggered by gluten protein in genetically susceptible individuals. CeD, once thought to be an uncommon disease, is now recognized to affect approximately 40-60 million people globally. While CeD is now well reported from a few Asian countries such as India, China, Pakistan, and Middle Eastern countries; it is still believed to be uncommon in the rest of Asia. Gluten-related diseases other than CeD, like non-celiac gluten sensitivity (NCGS) are also emerging globally. CeD and NCGS may present with either intestinal or extra-intestinal symptoms, and a proportion of them have overlapping symptoms with irritable bowel syndrome. Hence, many of them are misdiagnosed as having irritable bowel syndrome in clinical practice. In this review, we discuss the emergence of CeD and other gluten-related disorders, both globally and in Asia, the overlapping manifestations between gluten-related disorders and irritable bowel syndrome, and the challenges associated with diagnosis and management of CeD in Asia. (J Neurogastroenterol Motil 2021;27:337-346)
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Karan Sachdeva,Peeyush Kumar,Bhaskar Kante,Sudheer K. Vuyyuru,Srikant Mohta,Mukesh K. Ranjan,Mukesh K. Singh,Mahak Verma,Govind Makharia,Saurabh Kedia,Vineet Ahuja 대한장연구학회 2023 Intestinal Research Vol.21 No.2
Background/Aims: Intestinal tuberculosis (ITB) and Crohn’s disease (CD) frequently present with a diagnostic dilemma because of similar presentation. Interferon-gamma release assay (IGRA) has been used in differentiating ITB from CD, but with sparse reports on its diagnostic accuracy in tuberculosis endemic regions and this study evaluated the same. Methods: Patients with definitive diagnosis of ITB (n=59) or CD (n=49) who underwent IGRA testing (n=307) were retrospectively included at All India Institute of Medical Sciences, New Delhi (July 2014 to September 2021). CD or ITB was diagnosed as per standard criteria. IGRA was considered positive at >0.35 IU/mL. Relevant data was collected and IGRA results were compared between ITB and CD to determine its accuracy. Results: Among 59 ITB patients (mean age, 32.6±13.1 years; median disease duration, 1 year; male, 59.3%), 24 were positive and 35 tested negative for IGRA. Among 49 CD patients (mean age, 37.8±14.0; median disease duration, 4 years; male, 61.2%), 12 were positive and 37 tested negative for IGRA. Hence, for diagnosing ITB, IGRA showed a sensitivity, specificity, positive and negative predictive values of 40.68%, 75.51%, 66.67%, and 51.39%, respectively. The area under the curve of IGRA for ITB diagnosis was 0.66 (95% confidence interval, 0.55–0.75). In a subset (n=64), tuberculin skin test (TST) showed sensitivity, specificity, positive and negative predictive values of 64.7%, 73.3%, 73.3%, and 64.71%, respectively. IGRA and TST were concordant in 38 (59.4%) patients with κ=0.17. Conclusions: In a tuberculosis endemic region, IGRA had poor diagnostic accuracy for differentiating ITB from CD, suggesting a limited value of IGRA in this setting.
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( Ritika Rampal ),( Saurabh Kedia ),( Mohamad Nahidul Wari ),( Deepak Madhu ),( Amit Kumar Singh ),( Veena Tiwari ),( V. Pratap Mouli ),( Srikant Mohta ),( Govind Makharia ),( Vineet Ahuja ) 대한장연구학회 2021 Intestinal Research Vol.19 No.2
Background/Aims: Crohn’s disease (CD) and intestinal tuberculosis (ITB) remain “difficult-to-differentiate” diseases. We have previously documented peripheral blood frequency of CD4<sup>+</sup>CD25<sup>+</sup>FOXP3<sup>+</sup> T-regulatory cells (Treg) as a biomarker to differ entiate CD and ITB. We tried to validate these results in a larger cohort of CD and ITB patients. Methods: Seventy treatment naïve patients of CD (n=23) and ITB (n=47) (diagnosed by standard criteria) were recruited prospectively from October 2016 to May 2017. Patients with history of antitubercular therapy in the past were excluded. The frequency of Treg cells in periph eral blood was determined by flow cytometry, and compared between CD and ITB patients. Results: Similar to our previous study, frequency of Treg cells in peripheral blood was significantly increased in ITB as compared to CD patients (40.9 [inter quartile range, 33-50] vs. 24.9 [interquartile range, 14.4-29.6], P< 0.001). Further, the receiver operating characteristics curve also showed good diagnostic accuracy with an area under the curve (AUC) of 0.77 (95% confidence interval, 0.65-0.89) and a FOXP3<sup>+</sup> cutoff value of >31.3% had a sensitivity and specificity of 83% and 82.6% respectively, to differentiate ITB from CD. Even for the indeterminate cases (n=33), Treg cell frequency had similar diagnostic accuracy with an AUC of 0.85 (95% confi dence interval, 0.68-0.95) and a cutoff of 32.37% had sensitivity and specificity of 87% and 95% respectively, to differentiate ITB from CD. Conclusions: The current findings validate that the increased frequency of CD4<sup>+</sup>CD25<sup>+</sup>FOXP3<sup>+</sup> Treg in the peripheral blood can be used as a biomarker with high diagnostic accuracy to differentiate ITB from CD. (Intest Res 2021;19:232-238)
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