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beta Cell autoimmunity in a child with M.O.D.Y. (Maturity Onset Diabetes in the Young)
E Ortega-Rodriguez1, C Levy-Marchal, S Guillermine
1Pediatric Endocrine and Diabetes Unit, INSERM U457, Robert Debré Hospital, Paris, France. eduardoortega@mixmail.com
Insights
We identified a family with MODY type 2 diabetes where a child also had beta cell autoimmunity and HLA DQB1 risk factors for type 1 diabetes. Autoantibody screening is recommended for genetically defined diabetes to rule out concurrent type 1 diabetes risk.
Area of Science:
- Endocrinology
- Genetics
- Immunology
Background:
- Monogenic forms of diabetes, such as Maturity-Onset Diabetes of the Young (MODY), are genetically distinct from type 1 diabetes mellitus (T1DM).
- Distinguishing between monogenic diabetes and autoimmune diabetes is crucial for appropriate management and prognosis.
Observation:
- A family with a confirmed MODY type 2 (HNF1A-MODY) diagnosis was studied.
- One child in the family presented with beta cell autoimmunity and carried specific HLA DQB1 alleles, indicating a genetic predisposition to T1DM.
Findings:
- The co-occurrence of MODY type 2 and markers for T1DM autoimmunity highlights potential overlaps in genetic susceptibility.
- The presence of beta cell autoantibodies and specific HLA types in a genetically defined MODY patient suggests a risk for developing T1DM.
Implications:
- Genetic screening for diabetes should consider the possibility of concurrent autoimmune processes.
- Testing for beta cell autoantibodies is recommended in MODY patients, especially those with genetic risk factors for T1DM.
- This case underscores the importance of comprehensive diagnostic evaluation in diabetes mellitus to ensure accurate classification and prevent misdiagnosis.
Abstract:
We present the case of a well characterised M.O.D.Y. type 2 diabetes family in which one of the children associated beta cell autoimmunity and a HLA DQB1 at risk for immune-mediated type 1 diabetes mellitus. The search for autoantibodies against beta cell should be considered in cases of genetically defined form of diabetes mellitus to exclude the possibility of a concomitant risk to develop type 1 diabetes mellitus.