Cited by 229Pancreatic function and diabetesCell death mechanisms and regulationDiabetes and associated disorders

Cell Loss in Isolated Human Islets Occurs by Apoptosis

Paraskevas, Steven, Maysinger, Dusica, Wang, Rennien, Duguid, William P, Rosenberg, Lawrence·2000·Pancreas

Abstract

Purified islet allografts have largely failed to maintain long-term glucose homeostasis in human recipients, and the reasons for this are unclear. It is noteworthy, however, that islet isolation destroys or removes cellular and noncellular elements of the pancreas that could play an important role in supporting islet survival. The purpose of this study was to determine whether human islet isolation leads to the induction of programmed cell death. Human islets were enzymatically isolated from cadaveric donor pancreata using Liberase or Collagenase P, purified over a discontinuous BSA gradient, then cultured in RPMI 1640 at 37 degrees C in 5% CO2 for < or = 7 days. Islets were examined daily by routine histology and immunocytochemistry for islet hormones, DNA fragmentation [cell death; enzyme-linked immunosorbent assay (ELISA) and TUNEL assay] and for transglutaminase (TG) activity, two indicators of apoptosis. TG activity and DNA fragmentation increased by 1,000% and 1,890%, respectively (p < 0.05) This corresponded to the appearance of pyknotic nuclei on light microscopy, the presence of apoptotic bodies on electron microscopy, and the demonstration of TUNEL-positive cells. These were present primarily in a distribution that corresponded to the insulin-immunoreactive cells. At 5 days, 31.4 +/- 2.2% of islet cells were TUNEL positive. In summary, apoptosis of islet cells appears soon after islet isolation, and involves primarily the beta cell. This is the first report of apopt…

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Crossref · 10.1097/00006676-200004000-00008

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Authors
Paraskevas, S., Maysinger, D., Wang, R., Duguid, W. P., & Rosenberg, L.
Affiliations
Montreal General Hospital (CA)
Corresponding author
Rosenberg, Lawrence
Venue
Pancreas
Published
2000-04
Volume
20
Issue
3
Pages
270-276
ISSN
0885-3177 (ISSN-L)
OpenAlex
W2046236577
Cited by
229
References
0
Citations by year
2024: 6 · 2023: 7 · 2022: 6 · 2021: 8 · 2020: 7 · 2019: 7 · 2018: 15 · 2017: 10 · 2016: 11 · 2015: 9 · 2014: 7 · 2013: 14 · 2012: 12
FWCI
7.56
Type
journal article
Language
en
Open access
closed
Locations
  • Pancreas (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
Keywords
islet isolation, apoptosis, beta-cell death, human pancreatic islets, islet transplantation, transglutaminase activity, DNA fragmentation, TUNEL, Liberase, islet purification
MeSH terms
Adolescent, Adult, Cadaver, Cell Separation, Enzyme-Linked Immunosorbent Assay, Humans, Immunohistochemistry, Islets of Langerhans, Microscopy, Electron, Middle Aged, Transglutaminases, Thermolysin, Apoptosis, Collagenases, In Situ Nick-End Labeling, DNA Fragmentation

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