Toolkit/chemogenetic circuit manipulation

chemogenetic circuit manipulation

Construct Pattern·Research·Since 2016

Also known as: chemogenetic

Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

These approaches introduce ... drug sensitive channels (chemogenetic) into neurons that form specific circuits.

Usefulness & Problems

Why this is useful

Chemogenetic circuit manipulation introduces drug-sensitive channels into neurons so their function can be altered by administering a chemical actuator. The review presents it as a circuit-specific gain- or loss-of-function strategy.; gain- and loss-of-function manipulation within specific neural circuits; circuit-specific functional interrogation

Source:

gain- and loss-of-function manipulation within specific neural circuits

Source:

circuit-specific functional interrogation

Problem solved

It allows selective manipulation of neurons in specific circuits without relying on light-sensitive effectors.; enables selective control of neurons in defined circuits using drug-sensitive channels

Source:

It allows selective manipulation of neurons in specific circuits without relying on light-sensitive effectors.

Source:

enables selective control of neurons in defined circuits using drug-sensitive channels

Problem links

enables selective control of neurons in defined circuits using drug-sensitive channels

Literature

It allows selective manipulation of neurons in specific circuits without relying on light-sensitive effectors.

Source:

It allows selective manipulation of neurons in specific circuits without relying on light-sensitive effectors.

Published Workflows

Selective Manipulation of Neural Circuits

2016

Objective: Achieve selective manipulation of neural circuits by first defining circuit access logic and then applying gain- or loss-of-function effectors to the targeted neurons.

Why it works: The review frames circuit specificity as arising either from cell identity markers or from combining genetic elements across connected circuit nodes, after which effectors can be introduced into the selected neurons to alter function.

cell-identity-based targetingconnectivity-based intersectional targetinggain-of-function manipulationloss-of-function manipulationgenetic targetingintersectional targetingoptogenetic manipulationchemogenetic manipulation

Stages

1.
define circuit specificity strategy(library_design)
The review first distinguishes two general approaches for achieving circuit specificity, indicating that access logic is the primary design decision before manipulation.
Selection: Choose either genetic identity of the target cell or spatial connectivity of the circuit as the basis for specificity.
2.
combine targeting elements across circuit nodes(library_build)
This stage implements connectivity-based specificity by requiring convergence of two genetic elements within the same neuron.
Selection: Introduce one genetic element at the origin and another at the termination so that only neurons receiving both are manipulated.
3.
apply circuit-specific effector for gain or loss of function(functional_characterization)
After circuit access is established, the selected neurons can be functionally manipulated using optogenetic or chemogenetic effectors.
Selection: Introduce light-sensitive or drug-sensitive channels into neurons that form specific circuits.

Taxonomy & Function

Primary hierarchy

Mechanism Branch

Architecture: A reusable architecture pattern for arranging parts into an engineered system.

Mechanisms

chemically induced modulation of engineered drug-sensitive channelscircuit-specific gain-of-functioncircuit-specific loss-of-function

Techniques

No technique tags yet.

Target processes

No target processes tagged yet.

Input: Light

Implementation Constraints

cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: spectral hardware requirementoperating role: actuator

It requires genetic access to the target neurons and a compatible drug or ligand to engage the introduced chemogenetic actuator.; requires introduction of drug-sensitive channels into target neurons; requires administration of the relevant activating drug

The abstract does not identify which chemogenetic systems are used or how specificity, efficacy, and pharmacologic side effects are balanced.; the abstract does not specify particular chemogenetic receptor/channel systems, ligands, or performance tradeoffs

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Source 1review2016Neurotherapeutics

1 ranked citation 2 ranked claims Citation 1 Claim 1 Claim 2

Ranked Claims

Claim 1application scopesupports2016Source 1needs review

Circuit-specific manipulation tools are discussed as useful for identifying neural circuits that mediate behavior and for repair of neural connections.

Claim 2tool class functionsupports2016Source 1needs review

Optogenetic and chemogenetic approaches are reviewed as genetic techniques for gain- and loss-of-function within specific neural circuits.

Approval Evidence

1 source2 linked approval claimsfirst-pass slug chemogenetic-circuit-manipulation

These approaches introduce ... drug sensitive channels (chemogenetic) into neurons that form specific circuits.

Source:

application scopesupports

Circuit-specific manipulation tools are discussed as useful for identifying neural circuits that mediate behavior and for repair of neural connections.

Source:

tool class functionsupports

Optogenetic and chemogenetic approaches are reviewed as genetic techniques for gain- and loss-of-function within specific neural circuits.

Source:

Comparisons

Source-stated alternatives