Source 1primary paper2019Nature Metabolism
Toolkit/Granger causality analysis
Granger causality analysis
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Granger causality analysis revealed a controlling role for temporally defined leaders
Usefulness & Problems
Why this is useful
Granger causality analysis is used here to analyze time-resolved activity and identify leader β-cells with a controlling role in islet dynamics.; inferring controlling roles within β-cell activity networks; analyzing temporal leadership in Ca2+ dynamics
Source:
Granger causality analysis is used here to analyze time-resolved activity and identify leader β-cells with a controlling role in islet dynamics.
Source:
inferring controlling roles within β-cell activity networks
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analyzing temporal leadership in Ca2+ dynamics
Problem solved
It helps distinguish cells whose activity precedes and predicts broader islet signaling patterns.; supports identification of temporally defined leader cells with controlling roles
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It helps distinguish cells whose activity precedes and predicts broader islet signaling patterns.
Source:
supports identification of temporally defined leader cells with controlling roles
Problem links
supports identification of temporally defined leader cells with controlling roles
LiteratureIt helps distinguish cells whose activity precedes and predicts broader islet signaling patterns.
Source:
It helps distinguish cells whose activity precedes and predicts broader islet signaling patterns.
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.
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
It requires temporal activity measurements, here derived from Ca2+ imaging data.; requires time-resolved Ca2+ activity data
Independent follow-up evidence is still limited. Validation breadth across biological contexts is still narrow. Independent reuse still looks limited, so the evidence base may be fragile. No canonical validation observations are stored yet, so context-specific performance remains under-specified.
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
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
1 source1 linked approval claimfirst-pass slug granger-causality-analysis
Granger causality analysis revealed a controlling role for temporally defined leaders
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analysis resultsupports
Granger causality analysis revealed a controlling role for temporally defined leader β-cells.
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Comparisons
Source-backed strengths
provides an analysis framework for directional relationships in time-resolved activity data
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provides an analysis framework for directional relationships in time-resolved activity data
Compared with Langendorff perfused heart electrical recordings
Granger causality analysis and Langendorff perfused heart electrical recordings address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
Compared with native green gel system
Granger causality analysis and native green gel system address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
Granger causality analysis and sub-picosecond pump-probe analysis of bacteriorhodopsin pigments address a similar problem space.
Shared frame: same top-level item type
Strengths here: looks easier to implement in practice.
Ranked Citations
- 1.