Abstract
Diabetes mellitus is an increasingly common condition characterized by hyperglycemia caused by varying degrees of destruction and/or dysfunction of the pancreatic islets causing complete or near-complete loss (as in type 1 diabetes) or insufficient (as in type 2 diabetes) insulin secretion. The hyperglycemia, with the related disturbances of carbohydrate, protein and lipid metabolism, contributes to extrapancreatic tissue damage, including poor wound healing and the long-term complications of diabetic retinopathy, nephropathy, neuropathy and accelerated atherosclerosis. While diabetes has been known since 2500 BC, the survival and long-term prognosis of people with type 1 diabetes have only started to improve recently. Key developments have been the availability of exogenous insulin injections (since 1922), self-blood glucose monitoring and improved insulin preparations and delivery methods (over the last 30 years) and, for a very small minority, pancreas or islet transplantation. While the pathophysiology of the hyperglycemia of type 2 diabetes and gestational diabetes is complex, failure of insulin secretion to fully compensate for insulin resistance underscores the importance of pancreatic islet dysfunction in this heterogeneous condition. In this chapter, we describe normal pancreas function and how it is disturbed and treated in the common forms of diabetes. We also describe the short- and long-term consequences of diabetes that stem from pancreatic islet failure. Current and emerging glucose control treatments, most of which are closely related to and derived from normal islet function, are also reviewed. We hope this chapter, complemented by others in this volume, will increase the reader’s interest in and understanding of pancreatic islet biology and the clinical and research challenges, and assist them in diabetes-related research to provide better clinical outcomes for those with or at risk of diabetes.
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Abbreviations
- ACE:
-
Angiotensin-converting enzyme
- ADA:
-
American Diabetes Association
- AGEs:
-
Advanced glycation end-products
- ACTH:
-
Adrenocorticotropic hormone
- ADP:
-
Adenosine diphosphate
- ATP:
-
Adenosine triphosphate
- CCK:
-
Cholecystokinin
- CGM:
-
Continuous glucose monitoring
- CKD:
-
Chronic kidney disease
- CRF:
-
Corticotropin-releasing factor (or hormone)
- DCCT:
-
Diabetes control and complications trial
- DNA:
-
Deoxyribonucleic acid
- DIDMOAD:
-
Diabetes insipidus, diabetes mellitus, optic atrophy, deafness
- DKA:
-
Diabetic ketoacidosis
- DPP-4:
-
Dipeptidyl peptidase-4
- EGP:
-
Endogenous glucose production
- EDIC:
-
Epidemiology of diabetes interventions and complications
- GFR:
-
Glomerular filtration rate
- GH:
-
Growth hormone
- GHRF:
-
Growth hormone-releasing factor
- GHIH:
-
Growth hormone inhibitory hormone
- GIP-1:
-
Glucose-dependent insulinotropic polypeptide-1
- GLP-1:
-
Glucagon-like peptide-1
- GLUT:
-
Glucose transporter
- GSIS:
-
Glucose-stimulated insulin secretion
- GTP:
-
Guanosine triphosphate
- HIF:
-
Hypoxia inducible factor
- IAPP:
-
Islet amyloid polypeptide
- IV:
-
Intravenous
- LADA:
-
Latent autoimmune diabetes of adulthood
- MODY:
-
Maturity-onset diabetes of the young
- mRNA:
-
Messenger ribonucleic acid
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- oGTT:
-
Oral glucose tolerance test
- PKC:
-
Protein kinase C
- PP:
-
Pancreatic polypeptide
- RER:
-
Rough endoplasmic reticulum
- RRP:
-
Readily releasable pool
- SD:
-
Standard deviation
- T1D:
-
Type 1 diabetes mellitus
- T2D:
-
Type 2 diabetes mellitus
- TNF:
-
Tumor necrosis factor
- TSH:
-
Thyroid-stimulating hormone
- UKPDS:
-
United Kingdom Prospective Diabetes Study
- VEGF:
-
Vascular endothelial growth factor
- VIP:
-
Vasoactive intestinal peptide
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Acknowledgments
Authors are grateful for funding support from the University of Sydney, Sydney Medical School Foundation, and to Associate Professor Anand Hardikar and Dr. Mugdha Joglekar for helpful discussions.
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This chapter is dedicated to Marie-Elise and Liam McCallum and to other people who live with type 1 diabetes, with the hope that results of ongoing and future medical research will lessen the impact of diabetes on their lives.
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Jenkins, A.J., O’Neal, D.N., Nolan, C.J., Januszewski, A.S. (2016). The Pathobiology of Diabetes Mellitus. In: A. Hardikar, A. (eds) Pancreatic Islet Biology. Stem Cell Biology and Regenerative Medicine. Springer, Cham. https://doi.org/10.1007/978-3-319-45307-1_1
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DOI: https://doi.org/10.1007/978-3-319-45307-1_1
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