Objective-To determine the benefits of screening for celiac autoimmunity via IgA transglutaminase autoantibodies (TG) in children with type 1 diabetes (T1D).Study design-We followed 79 screening-identified TG+ and 56 matched TG− children with T1D for 2 years to evaluate growth, bone mineral density, nutritional status, and diabetes control. TG+ subjects self-selected to gluten-free or gluten-containing diet.Results-Of the initial cohort, 80% were available for re-examination after 2 years. TG+ subjects had consistently lower weight z-scores and higher urine N-telopeptides than TG− subjects, but similar measures of bone density and diabetes outcomes. TG+ children who remained on a gluten-containing diet had lower IGF-BP3 z-scores compared with TG+ subjects who reported following a gluten-free diet. Children who continued with high TG index throughout the study had lower bone mineral density z-scores, ferritin, and vitamin D 25OH levels, compared with the TG− group.Conclusions-No significant adverse outcomes were identified in children with T1D with screening-identified TG+ who delay GFD therapy for 2 years. Children with persistently high levels of TG may be at greater risk. The optimal timing of screening and treatment for CD in children with T1D requires further investigation.Keywords type 1 diabetes; pediatric; celiac disease; tissue transglutaminase autoantibodies; screening; gluten; diet Up to 16% of children with type 1 diabetes mellitus (T1D) have celiac disease (CD) 1,2,3,4,5 . Routine screening using IgA transglutaminase autoantibody (TG) has been recommended Corresponding author and reprint request author: Jill Simmons, MD, 11136 Doctors' Office Tower, 2200 Children's Way, Nashville, TN 37232-9170, (615) 936-1874 (office) (615) 343-5845 (fax), jill.h.simmons@vanderbilt.edu. The authors declare no conflicts of interest.Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
NIH Public Access
NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript 6,7 . However, important unanswered questions remain regarding benefit of gluten-free diet (GFD) in screening-identified TG+ children with T1D. Even though high TG levels are specific for biopsy-confirmed CD, low-positive TG may be associated with negative biopsy but may be a risk factor for future CD. The optimal timing of GFD initiation in screeningidentified TG+ children, with or without T1D, remains unclear. The child with T1D and CD faces two life-long changes in diet, yet untreated CD has been associated with recurrent hypoglycemia and poor glycemic control.We previously reported baseline data reg...