Abstract
Blood-tissue barriers prevent an uncontrolled exchange of large molecules between adjacent but metabolically separated compartments. There are several known barriers and two of the most important and tightest blood-tissue barriers are the blood-testis barrier (BTB) and the blood-brain barrier (BBB). Under normal conditions these barriers, formed by tight junctions between adjacent cells, control the entry of substances and metabolites. However, hyperglycemia and other diabetes-related complications, such as hypertension, impair the function of these biological barriers with dramatic consequences. Although both, BBB and BTB, are responsible for the maintenance of different biological processes, they have some remarkable similarities not always explored when looking at metabolic-related diseases such as diabetes. These barriers possess their own glucose sensing machinery, suffer a tied hormonal control and have specific mechanisms to counteract hyper- and hypoglycemia. In BBB and BTB the insulin signaling is also distinct from other tissues and organs thus evidencing their importance in protecting against or exacerbating the effects of diabetes on glucose metabolism. The control of glucose and lactate levels in brain and testis highlights the role of these barriers in protecting against peripheral glucose and lactate fluctuations that occur in the diabetic individual. We review the role of BBB and BTB in the control of glucose and metabolic dysfunction caused by diabetes in the brain and seminiferous epithelium. Gaining a better understanding of the molecular mechanisms through which glucose metabolism disrupts BBB and BTB function may highlight new opportunities for the treatment of diabetic complications in brain and male reproductive function.
Keywords: Diabetes, blood-brain barrier, blood-testis barrier, glucose metabolism, Sertoli cells, insulin, brain, hypertension, hypoglycemia, ionic changes, prostaglandins.
Current Diabetes Reviews
Title:Impact of Diabetes in Blood-Testis and Blood-Brain Barriers: Resemblances and Differences
Volume: 8 Issue: 6
Author(s): Marco G. Alves, Pedro F. Oliveira, Silvia Socorro and Paula I. Moreira
Affiliation:
Keywords: Diabetes, blood-brain barrier, blood-testis barrier, glucose metabolism, Sertoli cells, insulin, brain, hypertension, hypoglycemia, ionic changes, prostaglandins.
Abstract: Blood-tissue barriers prevent an uncontrolled exchange of large molecules between adjacent but metabolically separated compartments. There are several known barriers and two of the most important and tightest blood-tissue barriers are the blood-testis barrier (BTB) and the blood-brain barrier (BBB). Under normal conditions these barriers, formed by tight junctions between adjacent cells, control the entry of substances and metabolites. However, hyperglycemia and other diabetes-related complications, such as hypertension, impair the function of these biological barriers with dramatic consequences. Although both, BBB and BTB, are responsible for the maintenance of different biological processes, they have some remarkable similarities not always explored when looking at metabolic-related diseases such as diabetes. These barriers possess their own glucose sensing machinery, suffer a tied hormonal control and have specific mechanisms to counteract hyper- and hypoglycemia. In BBB and BTB the insulin signaling is also distinct from other tissues and organs thus evidencing their importance in protecting against or exacerbating the effects of diabetes on glucose metabolism. The control of glucose and lactate levels in brain and testis highlights the role of these barriers in protecting against peripheral glucose and lactate fluctuations that occur in the diabetic individual. We review the role of BBB and BTB in the control of glucose and metabolic dysfunction caused by diabetes in the brain and seminiferous epithelium. Gaining a better understanding of the molecular mechanisms through which glucose metabolism disrupts BBB and BTB function may highlight new opportunities for the treatment of diabetic complications in brain and male reproductive function.
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Cite this article as:
G. Alves Marco, F. Oliveira Pedro, Socorro Silvia and I. Moreira Paula, Impact of Diabetes in Blood-Testis and Blood-Brain Barriers: Resemblances and Differences, Current Diabetes Reviews 2012; 8 (6) . https://dx.doi.org/10.2174/157339912803529896
DOI https://dx.doi.org/10.2174/157339912803529896 |
Print ISSN 1573-3998 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6417 |
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