Related Experiment Video
Updated: Jul 11, 2026
12:32
High-resolution Respirometry to Measure Mitochondrial Function of Intact Beta Cells in the Presence of Natural Compounds
Published on: January 23, 2018
Sirtuins and beta-cell function
1Department of Diabetes and Metabolism, Novartis Institute for BioMedical Research, Cambridge, MA 02139, USA. laura.bordone@novartis.com
Diabetes, Obesity & Metabolism
|October 9, 2007
Summary
Recent advances in the science of ageing, particularly sirtuins and beta-cell biology, offer new insights into diet and gene interactions. This knowledge will be applied to promote healthy human ageing.
Area of Science:
- Gerontology and Molecular Biology
Background:
- Significant improvements in medicine, diet, and living conditions have increased human health span over the last century.
- Recent scientific progress has elucidated key factors contributing to the ageing process, including genetic and dietary influences.
Purpose of the Study:
- To review recent advancements in sirtuin and beta-cell biology.
- To discuss the application of this knowledge for promoting healthy ageing in humans.
Main Methods:
- Literature review of recent studies on sirtuins.
- Analysis of research on beta-cell function and its relation to ageing.
- Synthesis of findings to identify potential interventions for healthy ageing.
Main Results:
- Sirtuins and beta-cell biology are crucial areas in understanding ageing.
- Diet and genetic factors significantly impact the ageing process.
- Emerging knowledge provides a foundation for developing strategies to enhance healthy ageing.
Conclusions:
- Continued research into sirtuins and beta-cell biology is vital for understanding ageing.
- Translating this scientific knowledge can lead to interventions that improve human health span.
- The integration of genetic and dietary insights holds promise for advancing healthy ageing initiatives.
Related Concept Videos
01:27Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are co-secreted in...
Insulin and C-peptide are co-secreted in...
01:05Insulin Secretory Vesicles
Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
01:16Hormones Regulating Blood Glucose
Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
In addition to accelerating glucose uptake and utilization, insulin has...
01:28Insulin: The Receptor and Signaling Pathways
Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but this inhibition is released...
01:26Type I Diabetes II: Pathophysiology
Type 1 diabetes mellitus arises from an immune-mediated destruction of pancreatic β-cells, resulting in an absolute deficiency of insulin. This process develops in genetically susceptible individuals when autoimmunity, environmental exposures, and immunologic dysregulation converge to trigger a targeted attack on the insulin-producing cells of the pancreas. The β-cells are located within the islets of Langerhans and are essential for regulating blood glucose by facilitating cellular uptake of...
01:23Tissue Renewal without Stem Cells
After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
However, failure of such a system...
However, failure of such a system...