» Articles » PMID: 7626015

Differentiation-dependent Autophagy Controls the Fate of Newly Synthesized N-linked Glycoproteins in the Colon Adenocarcinoma HT-29 Cell Line

Overview
Journal Biochem J
Specialty Biochemistry
Date 1995 Jul 15
PMID 7626015
Citations 13
Authors
Affiliations
Soon will be listed here.
Abstract

Our previous results have demonstrated that, in undifferentiated human colon cancer HT-29 cells, a pool of glycoproteins bearing high-mannose oligosaccharides rapidly escapes the exocytic pathway to be degraded in the lysosomal compartment [Trugnan, Ogier-Denis, Sapin, Darmoul, Bauvy, Aubery and Codogno (1991) J. Biol. Chem. 266, 20849-20855]. We report here on the mechanism that governs this degradative pathway. Using pulse-chase experiments in combination with subcellular fractionation, we have observed that the sequestration of high-mannose glycoproteins in lysosomes was impaired by drugs which interfere with the autophagic-lysosomal pathway. The accumulation of high-mannose glycoproteins in the lysosomal fraction was shown to be part of the general autophagic pathway constitutively expressed in undifferentiated cells, as independently measured by the sequestration of the cytosolic enzyme lactate dehydrogenase and electroloaded raffinose. Furthermore, when HT-29 cells were cultured under differentiation-permissive conditions, the decreased accumulation of high-mannose glycoproteins in the lysosomal compartment was correlated with the decrease in autophagy.

Citing Articles

The dual roles of autophagy and the GPCRs-mediating autophagy signaling pathway after cerebral ischemic stroke.

Hou W, Hao Y, Sun L, Zhao Y, Zheng X, Song L Mol Brain. 2022; 15(1):14.

PMID: 35109896 PMC: 8812204. DOI: 10.1186/s13041-022-00899-7.


The Multifaceted Roles of Autophagy in Flavivirus-Host Interactions.

Ke P Int J Mol Sci. 2018; 19(12).

PMID: 30544615 PMC: 6321027. DOI: 10.3390/ijms19123940.


Increased hyaluronan levels in HABP1/p32/gC1qR overexpressing HepG2 cells inhibit autophagic vacuolation regulating tumor potency.

Saha P, Ghosh I, Datta K PLoS One. 2014; 9(7):e103208.

PMID: 25061661 PMC: 4111551. DOI: 10.1371/journal.pone.0103208.


G protein-coupled receptors and the regulation of autophagy.

Wauson E, Dbouk H, Ghosh A, Cobb M Trends Endocrinol Metab. 2014; 25(5):274-82.

PMID: 24751357 PMC: 4082244. DOI: 10.1016/j.tem.2014.03.006.


Reduced Warburg effect in cancer cells undergoing autophagy: steady- state 1H-MRS and real-time hyperpolarized 13C-MRS studies.

Lin G, Andrejeva G, Wong Te Fong A, Hill D, Orton M, Parkes H PLoS One. 2014; 9(3):e92645.

PMID: 24667972 PMC: 3965444. DOI: 10.1371/journal.pone.0092645.


References
1.
Seglen P, Bohley P . Autophagy and other vacuolar protein degradation mechanisms. Experientia. 1992; 48(2):158-72. DOI: 10.1007/BF01923509. View

2.
Hille M, Barrett A, DINGLE J, Fell H . Microassay for cathepsin D shows an unexpected effedt of cycloheximide on limb-bone rudiments in organ culture. Exp Cell Res. 1970; 61(2):470-2. DOI: 10.1016/0014-4827(70)90476-3. View

3.
Oude Elferink R, Strijland A, Reuser A, Tager J . Biosynthesis and intracellular transport of alpha-glucosidase and cathepsin D in normal and mutant human fibroblasts. Eur J Biochem. 1985; 153(1):55-63. DOI: 10.1111/j.1432-1033.1985.tb09266.x. View

4.
Houri J, Ogier-Denis E, Trugnan G, Codogno P . Autophagic degradation of N-linked glycoproteins is downregulated in differentiated human colon adenocarcinoma cells. Biochem Biophys Res Commun. 1993; 197(2):805-11. DOI: 10.1006/bbrc.1993.2550. View

5.
Opheim D, Touster O . Lysosomal alpha-D-mannosidase of rat liver. Purification and comparison with the golgi and cytosolic alpha-D-mannosidases. J Biol Chem. 1978; 253(4):1017-23. View