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Reduced Insulin Exo...
Reduced Insulin Exocytosis in Human Pancreatic β-cells With Gene Variants Linked to Type 2 Diabetes.
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- Rosengren, Anders (author)
- Lund University,Lunds universitet,Diabetes - öpatofysiologi,Forskargrupper vid Lunds universitet,Diabetes - Islet Patophysiology,Lund University Research Groups
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Braun, Matthias (author)
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- Mahdi, Taman (author)
- Lund University,Lunds universitet,Diabetes - öpatofysiologi,Forskargrupper vid Lunds universitet,Diabetes - Islet Patophysiology,Lund University Research Groups
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- Andersson, Sofia A (author)
- Lund University,Lunds universitet,Diabetes - öcellsexocytos,Forskargrupper vid Lunds universitet,Diabetes - Islet Cell Exocytosis,Lund University Research Groups
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Travers, Mary E (author)
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Shigeto, Makoto (author)
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- Zhang, Enming (author)
- Lund University,Lunds universitet,Diabetes - öpatofysiologi,Forskargrupper vid Lunds universitet,Diabetes - Islet Patophysiology,Lund University Research Groups
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- Almgren, Peter (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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- Ladenvall, Claes (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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- Axelsson, Annika (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Diabetes - öpatofysiologi,Genomics, Diabetes and Endocrinology,Lund University Research Groups,Diabetes - Islet Patophysiology
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- Edlund, Anna (author)
- Lund University,Lunds universitet,Diabetes - öcellsexocytos,Forskargrupper vid Lunds universitet,Diabetes - Islet Cell Exocytosis,Lund University Research Groups
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- Pedersen, Morten Gram (author)
- Lund University,Lunds universitet,Diabetes - öcellsexocytos,Forskargrupper vid Lunds universitet,Diabetes - Islet Cell Exocytosis,Lund University Research Groups
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- Jonsson, Anna (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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Ramracheya, Reshma (author)
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- Tang, Yunzhao (author)
- Lund University,Lunds universitet,Diabetes - öpatofysiologi,Forskargrupper vid Lunds universitet,Diabetes - Islet Patophysiology,Lund University Research Groups
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Walker, Jonathan N (author)
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Barrett, Amy (author)
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Johnson, Paul R V (author)
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- Lyssenko, Valeriya (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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McCarthy, Mark I (author)
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- Groop, Leif (author)
- Lund University,Lunds universitet,Genomik, diabetes och endokrinologi,Forskargrupper vid Lunds universitet,Genomics, Diabetes and Endocrinology,Lund University Research Groups
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- Salehi, S Albert (author)
- Lund University,Lunds universitet,Islet cell physiology,Forskargrupper vid Lunds universitet,Lund University Research Groups
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Gloyn, Anna L (author)
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- Renström, Erik (author)
- Lund University,Lunds universitet,Diabetes - öpatofysiologi,Forskargrupper vid Lunds universitet,Diabetes - Islet Patophysiology,Lund University Research Groups
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Rorsman, Patrik (author)
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- Eliasson, Lena (author)
- Lund University,Lunds universitet,Diabetes - öcellsexocytos,Forskargrupper vid Lunds universitet,Diabetes - Islet Cell Exocytosis,Lund University Research Groups
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(creator_code:org_t)
- 2012-06-15
- 2012
- English.
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In: Diabetes. - : American Diabetes Association. - 1939-327X .- 0012-1797. ; 61:7, s. 1726-1733
- Related links:
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http://www.ncbi.nlm....
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http://dx.doi.org/10...
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https://diabetes.dia...
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https://lup.lub.lu.s...
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https://doi.org/10.2...
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Abstract
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- The majority of genetic risk variants for type 2 diabetes (T2D) affect insulin secretion, but the mechanisms through which they influence pancreatic islet function remain largely unknown. We functionally characterized human islets to determine secretory, biophysical, and ultrastructural features in relation to genetic risk profiles in diabetic and nondiabetic donors. Islets from donors with T2D exhibited impaired insulin secretion, which was more pronounced in lean than obese diabetic donors. We assessed the impact of 14 disease susceptibility variants on measures of glucose sensing, exocytosis, and structure. Variants near TCF7L2 and ADRA2A were associated with reduced glucose-induced insulin secretion, whereas susceptibility variants near ADRA2A, KCNJ11, KCNQ1, and TCF7L2 were associated with reduced depolarization-evoked insulin exocytosis. KCNQ1, ADRA2A, KCNJ11, HHEX/IDE, and SLC2A2 variants affected granule docking. We combined our results to create a novel genetic risk score for β-cell dysfunction that includes aberrant granule docking, decreased Ca(2+) sensitivity of exocytosis, and reduced insulin release. Individuals with a high risk score displayed an impaired response to intravenous glucose and deteriorating insulin secretion over time. Our results underscore the importance of defects in β-cell exocytosis in T2D and demonstrate the potential of cellular phenotypic characterization in the elucidation of complex genetic disorders.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
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Diabetes
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- By the author/editor
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Rosengren, Ander ...
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Braun, Matthias
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Mahdi, Taman
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Andersson, Sofia ...
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Travers, Mary E
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Shigeto, Makoto
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show more...
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Zhang, Enming
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Almgren, Peter
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Ladenvall, Claes
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Axelsson, Annika
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Edlund, Anna
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Pedersen, Morten ...
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Jonsson, Anna
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Ramracheya, Resh ...
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Tang, Yunzhao
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Walker, Jonathan ...
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Barrett, Amy
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Johnson, Paul R ...
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Lyssenko, Valeri ...
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McCarthy, Mark I
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Groop, Leif
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Salehi, S Albert
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Gloyn, Anna L
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Renström, Erik
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Rorsman, Patrik
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Eliasson, Lena
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Endocrinology an ...
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Diabetes
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Lund University