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Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes
Currently, there is no ideal noninvasive method to quantify the progressive loss of pancreatic β-cell mass (BCM) that occurs in type 1 diabetes. Magnetic resonance imaging has detected gross differences in BCM between healthy and diabetic mice using the contrast agent manganese, which labels functio...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Diabetes Association
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3526033/ https://www.ncbi.nlm.nih.gov/pubmed/22933107 http://dx.doi.org/10.2337/db12-0153 |
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author | Antkowiak, Patrick F. Stevens, Brian K. Nunemaker, Craig S. McDuffie, Marcia Epstein, Frederick H. |
author_facet | Antkowiak, Patrick F. Stevens, Brian K. Nunemaker, Craig S. McDuffie, Marcia Epstein, Frederick H. |
author_sort | Antkowiak, Patrick F. |
collection | PubMed |
description | Currently, there is no ideal noninvasive method to quantify the progressive loss of pancreatic β-cell mass (BCM) that occurs in type 1 diabetes. Magnetic resonance imaging has detected gross differences in BCM between healthy and diabetic mice using the contrast agent manganese, which labels functional β-cells and increases the water proton relaxation rate (R1), but its ability to measure gradations in BCM during disease progression is unknown. Our objective was to test the hypothesis that measurements of the manganese-enhanced pancreatic R1 could detect decreasing BCM in a mouse model of type 1 diabetes. We used cyclophosphamide-accelerated BDC2.5 T-cell receptor transgenic nonobese diabetic mice, which experience development of type 1 diabetes during a 7-day time period after cyclophosphamide injection, whereas transgene-negative mice do not. We measured the manganese-enhanced pancreatic R1 before cyclophosphamide injection (day 0) and on days 3, 4, 5, and 7 afterward. Pancreatic R1 remained constant in transgene-negative mice and decreased stepwise day-to-day in transgene-positive mice, mirroring their loss of BCM, confirmed by pancreatic insulin measurements and histology. Changes in R1 in transgene-positive mice occurred before elevations in blood glucose, a clinical indicator of diabetes, suggesting potential for early noninvasive detection of changes in functional BCM. |
format | Online Article Text |
id | pubmed-3526033 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | American Diabetes Association |
record_format | MEDLINE/PubMed |
spelling | pubmed-35260332014-01-01 Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes Antkowiak, Patrick F. Stevens, Brian K. Nunemaker, Craig S. McDuffie, Marcia Epstein, Frederick H. Diabetes Technological Advances Currently, there is no ideal noninvasive method to quantify the progressive loss of pancreatic β-cell mass (BCM) that occurs in type 1 diabetes. Magnetic resonance imaging has detected gross differences in BCM between healthy and diabetic mice using the contrast agent manganese, which labels functional β-cells and increases the water proton relaxation rate (R1), but its ability to measure gradations in BCM during disease progression is unknown. Our objective was to test the hypothesis that measurements of the manganese-enhanced pancreatic R1 could detect decreasing BCM in a mouse model of type 1 diabetes. We used cyclophosphamide-accelerated BDC2.5 T-cell receptor transgenic nonobese diabetic mice, which experience development of type 1 diabetes during a 7-day time period after cyclophosphamide injection, whereas transgene-negative mice do not. We measured the manganese-enhanced pancreatic R1 before cyclophosphamide injection (day 0) and on days 3, 4, 5, and 7 afterward. Pancreatic R1 remained constant in transgene-negative mice and decreased stepwise day-to-day in transgene-positive mice, mirroring their loss of BCM, confirmed by pancreatic insulin measurements and histology. Changes in R1 in transgene-positive mice occurred before elevations in blood glucose, a clinical indicator of diabetes, suggesting potential for early noninvasive detection of changes in functional BCM. American Diabetes Association 2013-01 2012-12-13 /pmc/articles/PMC3526033/ /pubmed/22933107 http://dx.doi.org/10.2337/db12-0153 Text en © 2013 by the American Diabetes Association. Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. See http://creativecommons.org/licenses/by-nc-nd/3.0/ for details. |
spellingShingle | Technological Advances Antkowiak, Patrick F. Stevens, Brian K. Nunemaker, Craig S. McDuffie, Marcia Epstein, Frederick H. Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title | Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title_full | Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title_fullStr | Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title_full_unstemmed | Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title_short | Manganese-Enhanced Magnetic Resonance Imaging Detects Declining Pancreatic β-Cell Mass in a Cyclophosphamide-Accelerated Mouse Model of Type 1 Diabetes |
title_sort | manganese-enhanced magnetic resonance imaging detects declining pancreatic β-cell mass in a cyclophosphamide-accelerated mouse model of type 1 diabetes |
topic | Technological Advances |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3526033/ https://www.ncbi.nlm.nih.gov/pubmed/22933107 http://dx.doi.org/10.2337/db12-0153 |
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