Objective
The functional significance of subcellular compartmentalization in signal transduction has emerged in recent years, a development that is gaining momentum due to significant advances in optical microscopy and genetically encoded biosensors. However, much less attention has been given to the spatial architecture of the metabolic networks that provide energetic support for intracellular processes. This project will investigate spatiotemporal organization of energy metabolism in astrocytes, focusing on two hypotheses:
• I propose that within astrocytes, signalling microdomains are energetically supported by local delivery of ATP. I will employ confocal and total internal reflection fluorescence (TIRF) microscopy, using biosensors for ATP, glucose and Ca2+ that can be targeted to subcellular locations. My initial focus is on cultured human astrocytes and the provision of ATP for Ca2+ signalling. Do the five cellular sources of astrocytic ATP support different ATP pools? Which pools are needed for the many ATP-requiring steps that link cell-surface receptors to Ca2+ signals?
• I suggest that the ER lumen may provide a glucose reservoir that allows rapid intracellular transfer of glucose to meet local energy needs. The ER of astrocytes contains luminal glucose-6-phosphatase-β (G-6-Pase-β) and a glucose-6-phosphate transporter, which together can generate an ER luminal pool of glucose. The source of glucose-6-phosphate transported into the ER and the function of luminal glucose are unknown. Using cytosolic and ER-targeted glucose sensors, immunocytochemistry and siRNA knockdown of glucose G-6-Pase-β, I will determine the source of the glucose pool and whether it contributes to metabolic support of Ca2+ signals.
Combining state-of-the-art techniques and expertise in the fields of cell signalling and metabolism, this project will enhance our understanding of metabolic regulation of signal transduction, opening new possibilities for targeted treatments of brain diseases.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences biological sciences neurobiology
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering sensors biosensors
- natural sciences biological sciences cell biology cell signaling
- natural sciences chemical sciences inorganic chemistry alkaline earth metals
- natural sciences physical sciences optics microscopy confocal microscopy
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
MSCA-IF-EF-ST - Standard EF
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2014
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
CB2 1TN CAMBRIDGE
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.