Related Experiment Video
Updated: Jun 21, 2026
07:49
Immunohistological Labeling of Microtubules in Sensory Neuron Dendrites, Tracheae, and Muscles in the Drosophila Larva Body Wall
Published on: November 10, 2011
Dendrites differ from axons in patterns of microtubule stability and polymerization during development.
Katherine M Kollins1, Robert L Bell, Matthew Butts
1Department of Biology, Whitman College, Walla Walla, WA 99362, USA. katherine.kollins@gmail.com
Neural Development
|July 16, 2009
Summary
Microtubule dynamics differ between developing axons and dendrites. Dendrites exhibit more dynamic microtubules throughout, while axons show dynamic microtubules mainly at their tips, revealing distinct developmental patterns.
Area of Science:
- Neuroscience
- Cell Biology
- Developmental Biology
Background:
- Dendrites and axons exhibit distinct growth, development, and morphology.
- Microtubules are critical structural components influencing neuronal development.
- Understanding microtubule organization differences can distinguish axons from dendrites.
Purpose of the Study:
- To investigate microtubule stability and polymerization patterns in developing hippocampal neurons in vitro.
- To determine if microtubule organization can differentiate between axons and dendrites.
Main Methods:
- Quantitative ratiometric immunocytochemistry to assess microtubule stability.
- Live imaging using green fluorescent protein-tagged EB1 to analyze microtubule polymerization dynamics.
Main Results:
- Significant differences in microtubule stability were observed between axons and dendrites.
- Dendrites showed high levels of dynamic microtubules across the entire arbor.
- Axons displayed dynamic microtubules primarily at their distal ends, with anterograde-biased polymerization.
- Dendrites exhibited both anterograde and retrograde microtubule polymerization.
Conclusions:
- Newly formed microtubules are concentrated at the distal ends of both axons and dendrites.
- Dendrites possess more immature, dynamic microtubules compared to axons.
- These findings are crucial for understanding developmental regulation of microtubule dynamics and neuronal maturation.
Related Concept Videos
01:32Assembly of Complex Microtubule Structures
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
01:35Microtubules
There are three types of cytoskeletal structures in eukaryotic cells—microfilaments, intermediate filaments, and microtubules. With a diameter of about 25 nm, microtubules are the thickest of these fibers. Microtubules carry out a variety of functions that include cell structure and support, transport of organelles, cell motility (movement), and the separation of chromosomes during cell division.Microtubules are hollow tubes whose walls are made up of globular tubulin proteins. Each tubulin...
01:18Microtubules
Microtubules are the thickest cytoskeletal filaments with a diameter of 25 nm. In prokaryotic organisms, microtubules are commonly found in locomotory appendages like cilia and flagella. In eukaryotic cells, microtubules form specialized extensions for moving fluid over the surface, like those found in cells lining the intestine.
Microtubules have two structurally similar globular protein subunits: α and β tubulins. In the cytosol, the α and β tubulins form a heterodimer. These αβ-heterodimers...
Microtubules have two structurally similar globular protein subunits: α and β tubulins. In the cytosol, the α and β tubulins form a heterodimer. These αβ-heterodimers...
02:17Microtubule Instability
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
02:17Microtubule Instability
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
01:24Microtubules in Cell Motility
Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...