Cited by 115Cellular transport and secretionMicrotubule and mitosis dynamicsAutophagy in Disease and Therapy

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

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Parton, R G, Dotti, C G, Bacallao, R, Kurtz, I, Simons, K, Prydz, K·1991·The Journal of cell biology

Abstract

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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  • Activation of plus-end-directed movement at acidic pH is supported by experiments in which lysosomes and late endosomes move from the perinuclear region out to the periphery upon exposure of the cells to acidic buffers.

    “Activation of plus-end–directed movement at acidic pH is supported by experiments in which lysosomes and late endosomes move from the perinuclear region out to the periphery upon exposure of the cells to acidic buffers (Heuser, 1989; Parton et al., 1991).”

    From Light Chain– dependent Regulation of Kinesin's Interaction with Microtubules (1998) · cites this paper as Parton et al., 1991

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Authors
Parton, R. G., Dotti, C. G., Bacallao, R., Kurtz, I., Simons, K., & Prydz, K.
Affiliations
European Molecular Biology Laboratory (DE)
Venue
The Journal of cell biology
Published
1991-04-15
Volume
113
Issue
2
Pages
261-274
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2051534134
Cited by
115
References
53
Citations by year
2025: 4 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 5 · 2020: 4 · 2019: 1 · 2017: 3 · 2016: 3 · 2014: 2 · 2013: 1
FWCI
4.43
Type
journal article
Language
en
Open access
Locations
  • The Journal of Cell Biology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5k11dk001777-05, 5r29dk039212-04)
  • U.S. Public Health Service (A871013)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK39212, DK01777)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
late endosomes, microtubules, intracellular pH, mannose 6-phosphate receptor, lysosomes, hippocampal neurons, MDCK cells, epithelial cells, polarized cells, endosomal membrane fusion, microtubule depolymerization, endocytosis
MeSH terms
Animals, Cattle, Cell Line, Endocytosis, Epithelium, Hippocampus, Hydrogen-Ion Concentration, Kidney, Lysosomes, Microtubules, Neurons, Organelles, Rats

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