Microtubule Lifespan
Microtubule Lifespan - Related Videos
10:00
Measurement of Lifespan in Drosophila melanogaster
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Cited by 234 •
2013
Drosophila melanogaster is a powerful model organism for exploring the molecular basis of longevity regulation. This protocol will discuss the steps involved in generating a reproducible, population-based measurement of longevity as well as potential pitfalls and how to avoid them.
08:44
Invertebrate Lifespan Quantification
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2023
Many animals naturally stop growing upon reaching adulthood, after which they undergo aging or "senescence" until dying. The amount of time between an organism\'s birth and death is called its lifespan, which can be influenced by various biological and environmental factors. By exposing organisms to different growth conditions, scientists can better understand the factors affecting lifespan. Flies and worms are ideal organisms to perform such experiments, given their short generation time and...
12:20
Preparation of Segmented Microtubules to Study Motions Driven by the Disassembling Microtubule Ends
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Cited by 24 •
2014
Microtubules are inherently unstable polymers, and their switching between growth and shortening is stochastic and difficult to control. Here we describe protocols using segmented microtubules with photoablatable stabilizing caps. Depolymerization of segmented microtubules can be triggered with high temporal and spatial resolution, thereby assisting analysis of motions with the disassembling microtubule ends.
02:26
Lifespan Analysis: Measuring C. elegans Longevity
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2023
This video describes a traditional, plate-based method of measuring the lifespan of C. elegans. The example protocol measures the lifespan of worms treated with RNAi.
08:46
Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model
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Cited by 13 •
2011
Here we describe a set of DNA mutation assays that can be combined with the yeast chronological life span model to study the genes/pathways that regulate or contribute to genomic DNA instability during aging.
FAQs
The GTP-tubulin cap acts as a stabilizing feature at the growing end of a microtubule. While this cap is maintained, tubulin addition supports continued growth. When the cap is lost, the microtubule can undergo rapid depolymerization, shortening its persistence. This switching behavior makes cap regulation a major determinant of whether a microtubule continues or disassembles.
Microtubule-associated proteins can influence how long a polymer remains intact by modifying its stability or behavior. Cellular location also matters because microtubules operate in different structural environments and respond to local regulatory signals. Consequently, microtubules within one cell may have different lifespans, allowing the cytoskeleton to match organization and stability to regional cellular demands.
Dynamic instability allows microtubules to alternate between growth and shrinkage rather than remaining permanently fixed. Regulation of this behavior determines how quickly the cell can reorganize its internal architecture. Changes in microtubule lifespan can therefore affect the arrangement of structural elements and the cell’s ability to respond when its functional or spatial requirements change.
Appropriate persistence gives microtubules enough time to contribute to essential cellular structures and processes, while regulated disassembly permits remodeling. This balance supports chromosome segregation and intracellular transport, two functions identified with microtubule dynamics. Lifespan is therefore not simply a measure of stability; it helps coordinate when microtubule-based structures remain available and when they are reorganized.
Researchers should consider the timing of microtubule persistence together with episodes of growth and shrinkage. They also need to account for microtubule-associated proteins, cellular location, and regulatory signals because each can influence the observed duration. Examining these factors together helps connect polymer behavior with changes in cell architecture and function rather than treating lifespan as an isolated measurement.
This analysis is useful when researchers need to understand how cells organize their interiors, change shape, or form cilia. It also provides context for chromosome segregation and intracellular transport. Because lifespan reflects regulated microtubule behavior, studying it can link molecular dynamics with broader cellular outcomes in developmental biology and neurobiology.
Microtubule lifespan provides a way to consider how drug-induced changes in stability may alter cellular organization. A treatment that affects persistence could influence growth and shrinkage behavior, with consequences for chromosome segregation, transport, cell shape, or cilia formation. This makes microtubule dynamics relevant when investigating how compounds modify cell structure and function.