Immunological aspects of nutritional diabetes prevention in NOD mice: A pilot study for the cow's milk-based IDDM prevention trial

• Published in: Diabetes (New York, N.Y.) Vol. 46; no. 4; pp. 557 - 564
• Main Authors: KARGES, W, HAMMOND-MCKIBBEN, D, CHEUNG, R. K, VISCONTI, M, SHIBUYA, N, KEMP, D, DOSCH, H.-M
• Format: Journal Article
• Language: English
• Published: Alexandria, VA American Diabetes Association 01.04.1997
• Subjects: Adoptive Transfer; Analysis; Animals; Autoantigens - immunology; Biological and medical sciences; Care and treatment; Caseins - administration & dosage; Caseins - chemistry; Caseins - immunology; Cattle; Complications and side effects; Cross Reactions; Diabetes Mellitus, Type 1 - epidemiology; Diabetes Mellitus, Type 1 - immunology; Diabetes Mellitus, Type 1 - prevention & control; Diabetes. Impaired glucose tolerance; Diet; Dietary protein; Disease Models, Animal; Endocrine pancreas. Apud cells (diseases); Endocrinopathies; Etiopathogenesis. Screening. Investigations. Target tissue resistance; Female; Health aspects; Hydrolysis; Incidence; Insulin - analysis; Islets of Langerhans - pathology; Male; Medical sciences; Mice; Mice, Inbred NOD; Milk; Nutrition disorders; Nutritionally induced diseases; Ovalbumin - immunology; Pancreas - chemistry; Pilot Projects; Proteins in human nutrition; Serum Albumin - immunology; Spleen - cytology; Spleen - immunology; T-Lymphocytes - immunology; Time Factors; Type 1 diabetes; Endocrinopathy; Immunopathology; Insulitis; Rodentia; Autoimmune disease; Feeding; Antigen; Prevention; Milk protein; Vertebrata; Mammalia; Casein; Hydrolysate; Mouse; Risk factor; T-Lymphocyte; Insulin dependent diabetes; Endocrine pancreatic diseases
• ISSN: 0012-1797; 1939-327X
• DOI: 10.2337/diab.46.4.557

Human epidemiological studies delineated early exposure to intact dietary protein (e.g., most infant formulas) as an environmental risk factor for the development of IDDM. The Trial to Reduce IDDM in the Genetically at Risk (TRIGR), an international IDDM prevention trial, has been designed to determine if avoidance of intact dairy protein in high-risk infants < or =6 months of age can reduce the subsequent diabetes incidence. We here studied the casein hydrolysate-based trial diet (Nutramigen) in NOD mice. When given either continuously or for 10 weeks after weaning, the test diet was highly effective in preventing autoimmune diabetes (32-week incidence: 4.6 vs. 58.8%) and in preserving pancreatic insulin levels, with little effect on islet inflammation. Spleen cells from protected NOD mice failed to adoptively transfer diabetes into irradiated syngeneic recipients. When co-transferred with splenocytes from diabetic donors, cells from diet-protected mice inhibited adoptive diabetes transfer (incidence 50 vs. 94%, P < 0.001). T-cell reactivity to the islet cell autoantigens ICA69 (islet cell antigen 69) and GAD65 developed only in diabetic recipients of spleen cell grafts, indicating that diabetes protection extends to more than one autoantigen. In protected mice, ICA69 T-cell reactivity was not detectable spontaneously nor after priming with this autoantigen; however, priming with the cross-reactive non-self-antigen bovine serum albumin recruited T-cells responsive to ICA69. Thus, diabetes prevention with the clinical trial diet is effective in NOD mice, where it affects some T-cell repertoires and allows development of regulatory cells that interfere with destructive autoimmunity.