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Related Concept Videos

Autophagy01:27

Autophagy

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
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Nuclear Protein Sorting01:34

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Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
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Delivery Pathways to the Lysosome01:36

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
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The Nucleolus02:55

The Nucleolus

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The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
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Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
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In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice
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Mammalian nucleophagy: process and function.

Fujian Ji1, Enyong Dai2, Rui Kang3

  • 1Department of Gastrointestinal and Colorectal Surgery, China-Japan Union Hospital of Jilin University, Changchun, China.

Autophagy
|January 19, 2025
PubMed
Summary
This summary is machine-generated.

Nucleophagy, a selective autophagy process, is crucial for maintaining nuclear integrity by removing damaged nuclear components. Dysfunctional nucleophagy is linked to aging and diseases like cancer and neurodegeneration.

Keywords:
Autophagydiseasemicronucleusnuclear quality controlnucleophagy

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Autophagy Research

Background:

  • The nucleus, containing genetic material, controls vital cellular functions.
  • Nuclear integrity and genomic stability are maintained by regulatory mechanisms.
  • Nucleophagy, a selective autophagy, clears dysfunctional nuclear components.

Purpose of the Study:

  • To review the mechanisms and regulation of nucleophagy in mammalian cells.
  • To discuss cargo selection in nucleophagy.
  • To evaluate the therapeutic potential of nucleophagy for human health and disease.

Main Methods:

  • Literature review focusing on nucleophagy mechanisms.
  • Analysis of nucleophagy regulation and cargo recognition.
  • Evaluation of nucleophagy's role in aging and disease pathology.

Main Results:

  • Nucleophagy removes damaged nuclear materials like proteins, DNA-protein crosslinks, and micronuclei.
  • Impaired nucleophagy is associated with aging, cancer, neurodegeneration, and other disorders.
  • Understanding nucleophagy offers therapeutic avenues for various diseases.

Conclusions:

  • Nucleophagy is essential for preserving nuclear integrity and genomic stability.
  • Defects in nucleophagy contribute to aging and diverse pathological conditions.
  • Targeting nucleophagy presents a promising therapeutic strategy for human diseases.