Related Experiment Video
Updated: Jan 22, 2026
08:46
Studying Synaptic Vesicle Pools using Photoconversion of Styryl Dyes
Published on: February 15, 2010
12.1K
Control of Synaptic Specificity by Establishing a Relative Preference for Synaptic Partners
Chundi Xu1, Emma Theisen1, Ryan Maloney1
1Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115, USA.
Neuron
|July 14, 2019
Summary
Drosophila Dpr and DIP proteins regulate synaptic partner selection in the visual system. Mis-expressing DIP promotes specific synapse formation, while disrupting DIP causes neurons to connect with incorrect partners.
Area of Science:
- Neuroscience
- Developmental Biology
- Molecular Biology
Background:
- Synaptic partner selection is crucial for neural circuit assembly but poorly understood.
- Drosophila Dpr and DIP immunoglobulin superfamily (IgSF) proteins are cell-surface molecules involved in visual system circuit formation.
- These proteins exhibit complementary expression patterns between potential synaptic partners.
Purpose of the Study:
- To investigate the role of Drosophila Dpr and DIP proteins in regulating synaptic partner selection.
- To determine how these proteins influence synapse formation in the visual system.
Main Methods:
- Investigated DIP mis-expression in Drosophila lamina.
- Studied the effects of disrupting DIP function on synapse formation.
- Utilized genetic manipulation and microscopy techniques.
Main Results:
- Mis-expression of DIP in Drosophila lamina neurons was sufficient to promote synapse formation with Dpr-expressing neurons.
- Disrupting DIP function led to ectopic synapse formation, indicating inappropriate connections.
- These results suggest DIP proteins actively promote specific synaptic connections.
Conclusions:
- DIP proteins play a critical role in ensuring specific synaptic connections between neurons.
- Neurons may possess a broader capacity for synaptogenesis than previously thought.
- Synaptic specificity is achieved by neurons developing a preference for particular partners, mediated by proteins like DIP.
Keywords:
Dpr and DIP proteinsDrosophila visual systemcell recognition moleculessynapse formationsynaptic specificityMore Related Videos
Related Concept Videos
01:12Synaptic Signaling
79.2K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
79.2K
01:09Synaptic Signaling
6.6K
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
6.6K
01:28Integration of Synaptic Events
3.5K
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
3.5K
01:29Clinically Relevant Drug Product Specifications: Methods of Establishment
208
Product specifications define the acceptable quality of a pharmaceutical product by ensuring identity, purity, potency, and strength. These specifications serve as benchmarks during development, manufacturing, and post-approval quality control. Clinically relevant specifications are particularly important because they directly relate to a drug's safety and efficacy in clinical use.Dissolution studies are critical biopharmaceutic tools that link in vitro behavior to in vivo performance. They...
208
02:53Conservative Site-specific Recombination and Phase Variation
6.7K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
6.7K
01:12Relative Risk
2.0K
Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
2.0K