pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells

The interaction between late endocytic structures and microtubules in polarized cells was studied using a procedure previously shown to cause microtubule-dependent redistribution of lysosomes in fibroblasts and macrophages (Heuser, J. 1989. J. Cell Biol. 108:855-864). In cultured rat hippocampal neu...

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Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1991
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2288934/
https://www.ncbi.nlm.nih.gov/pubmed/2010463
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description The interaction between late endocytic structures and microtubules in polarized cells was studied using a procedure previously shown to cause microtubule-dependent redistribution of lysosomes in fibroblasts and macrophages (Heuser, J. 1989. J. Cell Biol. 108:855-864). In cultured rat hippocampal neurons, low cytoplasmic pH caused cation-independent mannose-6-phosphate receptor-enriched structures to move out of the cell body and into the processes. In filter grown MDCK cells lowering the cytosolic pH to approximately 6.5 caused late endosomes to move to the base of the cell and this process was shown to be microtubule dependent. Alkalinization caused a shift in distribution towards the apical pole of the cell. The results are consistent with low pH causing the redistribution of late endosomes towards the plus ends of the microtubules. In MDCK cells the microtubules orientated vertically in the cell may play a role in this process. The shape changes that accompanied the redistribution of the late endosomes in MDCK cells were examined by electron microscopy. On low pH treatment fragmentation of the late endosomes was observed whereas after microtubule depolymerization individual late endosomal structures appeared to fuse together. The late endosomes of the MDCK cell appear to be highly pleomorphic and dependent on microtubules for their form and distribution in the cell.
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spelling pubmed-22889342008-05-01 pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells J Cell Biol Articles The interaction between late endocytic structures and microtubules in polarized cells was studied using a procedure previously shown to cause microtubule-dependent redistribution of lysosomes in fibroblasts and macrophages (Heuser, J. 1989. J. Cell Biol. 108:855-864). In cultured rat hippocampal neurons, low cytoplasmic pH caused cation-independent mannose-6-phosphate receptor-enriched structures to move out of the cell body and into the processes. In filter grown MDCK cells lowering the cytosolic pH to approximately 6.5 caused late endosomes to move to the base of the cell and this process was shown to be microtubule dependent. Alkalinization caused a shift in distribution towards the apical pole of the cell. The results are consistent with low pH causing the redistribution of late endosomes towards the plus ends of the microtubules. In MDCK cells the microtubules orientated vertically in the cell may play a role in this process. The shape changes that accompanied the redistribution of the late endosomes in MDCK cells were examined by electron microscopy. On low pH treatment fragmentation of the late endosomes was observed whereas after microtubule depolymerization individual late endosomal structures appeared to fuse together. The late endosomes of the MDCK cell appear to be highly pleomorphic and dependent on microtubules for their form and distribution in the cell. The Rockefeller University Press 1991-04-02 /pmc/articles/PMC2288934/ /pubmed/2010463 Text en This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Articles
pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title_full pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title_fullStr pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title_full_unstemmed pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title_short pH-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
title_sort ph-induced microtubule-dependent redistribution of late endosomes in neuronal and epithelial cells
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2288934/
https://www.ncbi.nlm.nih.gov/pubmed/2010463