Insulin Aggregation
Insulin Aggregation - Related Videos
05:52
Insulin Injection and Hemolymph Extraction to Measure Insulin Sensitivity in Adult Drosophila melanogaster
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Cited by 16 •
2011
Conserved insulin signaling pathways found in the fruit fly Drosophila melanogaster make this organism a potential tool for modeling metabolic disorders including type II diabetes. To this end, it is critical to establish physiological assays to effectively measure systemic insulin action in peripheral glucose disposal in the adult fly.
12:08
Improving IV Insulin Administration in a Community Hospital
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Cited by 7 •
2012
When compared to the previous paper protocol, implementation of a computerized glucose management system results in a substantial increase in blood glucose concentration measurements within the target range. Using a computerized glucose management system to monitor blood glucose levels, decreases in severe hypoglycemia (<40 mg/dL), clinical hypoglycemia (<70 mg/dL), and hyperglycemia (>180 mg/dL) also can be observed.
10:10
Aggregates for Concrete and Asphaltic Mixes
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Concrete and asphalt are by far the most common construction materials used today. Concrete is a composite material consisting of cement, water, air, coarse aggregate, and fine aggregates. Fine aggregates are typically sands and coarse aggregates are natural or crushed rocks. Chemical admixtures to modify certain specific properties are also commonly used (i.e., superplasticizers to make the...
09:14
Tracking Hypoxic Signaling within Encapsulated Cell Aggregates
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Cited by 10 •
2011
A method for photo-encapsulation of cells in a crosslinked PEG hydrogel is described. Hypoxic signaling within encapsulated murine insulinoma (MIN6) aggregates is tracked using a fluorescent marker system. This system allows serial examination of cells within a hydrogel scaffold and correlation of hypoxic signaling with changes in cell phenotype.
14:39
A Quantitative Assay for Insulin-expressing Colony-forming Progenitors
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Cited by 11 •
2011
A three-dimensional clonogenic assay that allows pancreatic-like progenitors to differentiate into insulin-expressing colonies is described. This method takes advantage of semi-solid media containing methylcellulose, Matrigel and growth factors, in which single progenitors proliferate and differentiate in vitro, permitting quantification of the number of functional progenitors in a population.
FAQs
Misfolding initiates aggregation by exposing hydrophobic regions that are normally buried inside insulin molecules. These newly accessible surfaces promote intermolecular association, while nucleation creates an initial organized assembly that can support β-sheet formation and subsequent fibril growth. This sequence connects a molecular conformational change to larger assemblies that may compromise an injectable product.
Heat, agitation, altered pH, and contact with air-liquid or solid interfaces can accelerate insulin aggregation. These conditions may increase molecular interactions or promote conformational changes that expose aggregation-prone regions. Storage and formulation strategies therefore need to limit relevant stresses, because aggregation risk depends not only on the insulin molecule but also on its physical and chemical environment.
Soluble oligomers and larger fibrils represent different assembly states along the aggregation process. Oligomers remain soluble, whereas fibrils are larger assemblies that can become insoluble and are associated with β-sheet-rich growth. Distinguishing these forms helps researchers track how aggregation progresses and assess whether a formulation contains early assemblies, advanced fibrils, or both.
Aggregation can reduce the effective dose delivered by an insulin product and complicate its delivery as an injectable therapy. It may also alter biological activity and increase the possibility of unwanted immune responses. Consequently, aggregation is not only a physical stability concern; it directly affects therapeutic consistency, product safety, and the reliability of pharmacological treatment.
Researchers can compare insulin exposed to relevant stresses, including heat, agitation, pH changes, and air-liquid or solid interfaces. They can then examine whether the material remains in soluble forms or progresses toward larger, potentially insoluble assemblies. Comparing these conditions identifies aggregation-promoting factors and supports decisions about storage, formulation, and quality-control requirements.
Aggregation studies inform formulation design by revealing which environmental stresses should be minimized during storage and handling. Findings can guide efforts to maintain insulin in a stable form, limit exposure to damaging conditions, and preserve activity in injectable therapies. This work supports storage optimization because a formulation must remain suitable throughout the conditions encountered before administration.
In pharmacological quality control, aggregation assessment helps determine whether an insulin product has developed altered molecular assemblies that could affect dose, delivery, activity, or immune-response risk. Evaluating aggregation alongside these therapeutic concerns supports decisions about product stability and suitability. The approach is especially relevant for biologic medicines, whose quality can change when molecular structure changes.