Source 1primary paper2019Nature Metabolism
Toolkit/photoablation
photoablation
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Photoablation of zebrafish leader cells disrupted pan-islet signalling, identifying these as likely pacemakers.
Usefulness & Problems
Why this is useful
Photoablation is presented here as an optical means to directly perturb a sample in force-related biological experiments.; direct physical perturbation of samples during biomechanical studies; Photoablation is used here to remove or disable identified leader cells in zebrafish and test their role in coordinating islet activity.; functional perturbation of leader β-cells; testing whether specific cells are required for pan-islet signaling
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Photoablation is presented here as an optical means to directly perturb a sample in force-related biological experiments.
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direct physical perturbation of samples during biomechanical studies
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Photoablation is used here to remove or disable identified leader cells in zebrafish and test their role in coordinating islet activity.
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functional perturbation of leader β-cells
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testing whether specific cells are required for pan-islet signaling
Problem solved
It provides a way to impose a physical perturbation while studying biomechanical behavior.; enables optical perturbation of a sample while observing biomechanical responses; It provides a direct perturbation test of whether leader cells are necessary for coordinated pan-islet signaling.; provides causal perturbation evidence for leader-cell function
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It provides a way to impose a physical perturbation while studying biomechanical behavior.
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enables optical perturbation of a sample while observing biomechanical responses
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It provides a direct perturbation test of whether leader cells are necessary for coordinated pan-islet signaling.
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provides causal perturbation evidence for leader-cell function
Problem links
enables optical perturbation of a sample while observing biomechanical responses
LiteratureIt provides a way to impose a physical perturbation while studying biomechanical behavior.
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It provides a way to impose a physical perturbation while studying biomechanical behavior.
provides causal perturbation evidence for leader-cell function
LiteratureIt provides a direct perturbation test of whether leader cells are necessary for coordinated pan-islet signaling.
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It provides a direct perturbation test of whether leader cells are necessary for coordinated pan-islet signaling.
Published Workflows
Objective: Assess glucose-regulated β-cell connectivity and identify regulatory leader or hub β-cells coordinating Ca2+ dynamics across pancreatic islets in vivo.
Why it works: The workflow combines in vivo Ca2+ imaging to observe coordinated activity, perturbation to test necessity of leader cells, and analytical methods to infer controlling roles and molecular signatures.
leader-cell initiation of Ca2+ waveshub-cell coordination of islet connectivityGCaMP6 calcium imagingphotoablationGranger causality analysistranscriptomic analysis
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Techniques
Functional AssayTarget 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: sensor
It requires microscopy-compatible photoablation capability within the imaging setup.; optical microscopy setup capable of photoablation; It requires optical access to the targeted cells and prior identification of leader cells.; requires optical access to targeted cells in vivo
The abstract does not state that photoablation itself measures force; it is described as a perturbation tool.; the abstract does not specify force range, resolution, or biological constraints
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Observations
successBacteriaapplication demoDanio rerio
Inferred from claim c3 during normalization. Photoablation of zebrafish leader cells disrupted pan-islet signalling, supporting that leader cells act as likely pacemakers. Derived from claim c3.
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Supporting Sources
Source 2review2021Frontiers in Cell and Developmental Biology
Ranked Claims
Microscopy-based force measurement techniques are used to measure cell-applied forces, visualize deformations caused by external forces, and support optical perturbation in biomechanical studies.
many force measurement techniques rely on optical microscopy to measure forces being applied by cells on their environment, to visualize specimen deformations due to external forces, or even to directly apply a physical perturbation to the sample via photoablation or optogenetic tools
Granger causality analysis revealed a controlling role for temporally defined leader β-cells.
Photoablation of zebrafish leader cells disrupted pan-islet signalling, supporting that leader cells act as likely pacemakers.
GCaMP6 was used to assess glucose-regulated connectivity in vivo in living zebrafish and in murine or human islets transplanted into the anterior eye chamber.
Approval Evidence
2 sources2 linked approval claimsfirst-pass slug photoablation
to directly apply a physical perturbation to the sample via photoablation or optogenetic tools
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Photoablation of zebrafish leader cells disrupted pan-islet signalling, identifying these as likely pacemakers.
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review scope summarysupports
Microscopy-based force measurement techniques are used to measure cell-applied forces, visualize deformations caused by external forces, and support optical perturbation in biomechanical studies.
many force measurement techniques rely on optical microscopy to measure forces being applied by cells on their environment, to visualize specimen deformations due to external forces, or even to directly apply a physical perturbation to the sample via photoablation or optogenetic tools
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causal perturbationsupports
Photoablation of zebrafish leader cells disrupted pan-islet signalling, supporting that leader cells act as likely pacemakers.
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Comparisons
Source-stated alternatives
The abstract directly pairs photoablation with optogenetic tools as another way to apply perturbations.
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The abstract directly pairs photoablation with optogenetic tools as another way to apply perturbations.
Source-backed strengths
can be used within optical microscopy-based biomechanical experiments; links targeted cell removal to disruption of pan-islet signaling
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can be used within optical microscopy-based biomechanical experiments
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links targeted cell removal to disruption of pan-islet signaling
Compared with optogenetic
The abstract directly pairs photoablation with optogenetic tools as another way to apply perturbations.
Shared frame: source-stated alternative in extracted literature
Strengths here: can be used within optical microscopy-based biomechanical experiments; links targeted cell removal to disruption of pan-islet signaling.
Relative tradeoffs: the abstract does not specify force range, resolution, or biological constraints.
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The abstract directly pairs photoablation with optogenetic tools as another way to apply perturbations.
Ranked Citations
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