ArticleBiomolecules2022
The Polyamine Spermine Potentiates the Propagation of Negatively Charged Molecules through the Astrocytic Syncytium.
Article in Biomolecules, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
8 citing papers in PubMed, 6 citations in OpenAlex.
- Controlling Epileptic Activity by Modulating Putrescine Metabolism.Biomolecules · 2026Article
- ATP13A4 gates extracellular polyamine levels to control excitatory synaptogenesis.Nature communications · 2026Article
- Polyamines in CNS malignancies: positively charged culprits in the hijacking of neural and immune signaling pathways.Amino acids · 2026Review
- Role of Glyoxalase in Astrocytes' Supportive Function Under Hyperglycemic Conditions: Aminoguanidine and Kir4.1 Channel Recovery.Brain sciences · 2025Article
- Age-Dependent Redistribution of the Life-Important Enzyme in the Retina: Adult Müller Glial Cells' Endfeet Lack Spermine Synthase Expression.Biomolecules · 2025Article
- Astrocytic spermidine insufficiency contributes to enhanced pain sensitivity associated with ApoE4.The journal of headache and pain · 2025Article
- Spermidine Synthase Localization in Retinal Layers: Early Age Changes.International journal of molecular sciences · 2024Article
- Advances in the Electrophysiological Recordings of Long-Term Potentiation.International journal of molecular sciences · 2023Review
Corrections and comments
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Authors and funding
8 authors at 4 institutions in 3 countries.
Funding
Abstract
The interest in astrocytes, the silent brain cells that accumulate polyamines (PAs), is growing. PAs exert anti-inflammatory, antioxidant, antidepressant, neuroprotective, and other beneficial effects, including increasing longevity in vivo. Unlike neurons, astrocytes are extensively coupled to others via connexin (Cx) gap junctions (GJs). Although there are striking modulatory effects of PAs on neuronal receptors and channels, PA regulation of the astrocytic GJs is not well understood. We studied GJ-propagation using molecules of different (i) electrical charge, (ii) structure, and (iii) molecular weight. Loading single astrocytes with patch pipettes containing membrane-impermeable dyes, we observed that (i) even small molecules do not easily permeate astrocytic GJs, (ii) the ratio of the charge to weight of these molecules is the key determinant of GJ permeation, (iii) the PA spermine (SPM) induced the propagation of negatively charged molecules via GJs, (iv) while no effects were observed on propagation of macromolecules with net-zero charge. The GJ uncoupler carbenoxolone (CBX) blocked such propagation. Taken together, these findings indicate that SPM is essential for astrocytic GJ communication and selectively facilitates intracellular propagation via GJs for negatively charged molecules through glial syncytium.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.