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Autophagy, heterophagy, microautophagy and crinophagy as the means for intracellular degradation

  • Published:
Virchows Archiv B

Summary

It is generally accepted that the lysosomal compartment plays an important role in the degradation of cellular components.

In this communication we discuss various experimental models which have been used to study mechanisms of intralysosomal degradation and also discuss the evidence obtained in support of the following proposals:

  1. 1.

    The autophagosomes can be isolated into high purity and are the subcellular locus of induced protein degradation.

  2. 2.

    Different membrane components such as proteins and lipids are degraded at different rates inside the lysosomes. Intralysosomal hydrolysis is not the rate limiting step in degradation.

  3. 3.

    Lysosomes take up soluble material in vitro by invagination and pinching off of their membranes (microautophagy).

  4. 4.

    Secretory vesicles can degrade their secretory contents by fusing with the lysosomes.

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Authors and Affiliations

  1. Department of Pathology, Karolinska Institutet, Huddinge University Hospital, S-14186, Huddinge, Sweden

    L. Marzella, J. Ahlberg & H. Glaumann

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  1. L. Marzella
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  2. J. Ahlberg
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  3. H. Glaumann
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Marzella, L., Ahlberg, J. & Glaumann, H. Autophagy, heterophagy, microautophagy and crinophagy as the means for intracellular degradation. Virchows Archiv B Cell Pathol 36, 219–234 (1981). https://doi.org/10.1007/BF02912068

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  • DOI: https://doi.org/10.1007/BF02912068

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