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Kusmartseva I, Beery M, Hiller H, Padilla M, Selman S, Posgai A, Nick HS, Campbell-Thompson M, Schatz DA, Haller MJ, Wasserfall CH, Atkinson MA. Temporal Analysis of Amylase Expression in Control, Autoantibody-Positive, and Type 1 Diabetes Pancreatic Tissues. Diabetes 2020; 69:60-66. [PMID: 31597639 PMCID: PMC6925584 DOI: 10.2337/db19-0554] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 10/02/2019] [Indexed: 12/16/2022]
Abstract
Within the human pancreas, exocrine and endocrine cells control secretion of digestive enzymes and production of hormones to maintain metabolic homeostasis, respectively. While the vast majority of type 1 diabetes research efforts have focused on endocrine function and autoimmunity, recent studies identified a series of unique features (e.g., reduced weight and volume, increased density of leukocytes) within the exocrine pancreas in this disease, but the mechanisms underlying these aberrancies are unknown. Therefore, we histologically assessed amylase, insulin, glucagon, lipase, and/or trypsinogen in 78 organ donor pancreata from birth through adulthood in control subjects and those at various stages of type 1 diabetes. While amylase-positive (AMY+) acinar cells were detectable in pancreata from all study groups, tissues from individuals >2 years of age contained clusters of acinar cells devoid of amylase (AMY-). A majority of these AMY- cell clusters localized proximal to islets (i.e., peri-islet). Additionally, most AMY- clusters were positive for the exocrine enzymes lipase and trypsinogen. Interestingly, type 1 diabetes pancreata displayed significant reductions in the frequency of these AMY- cell clusters. These results support a contribution of the islet-acinar axis in pancreatic development and underscore a potential role for the exocrine pancreas in the pathogenesis of type 1 diabetes.
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Affiliation(s)
- Irina Kusmartseva
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Maria Beery
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Helmut Hiller
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Myriam Padilla
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Stephen Selman
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Amanda Posgai
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Harry S Nick
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL
| | - Martha Campbell-Thompson
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Desmond A Schatz
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL
| | - Michael J Haller
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL
| | - Clive H Wasserfall
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
| | - Mark A Atkinson
- Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL
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