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Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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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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Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
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Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
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Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
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Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis.
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Achieving Endo/Lysosomal Escape Using Smart Nanosystems for Efficient Cellular Delivery.

Nimeet Desai1, Dhwani Rana2, Sagar Salave2

  • 1Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India.

Molecules (Basel, Switzerland)
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Smart nanomaterials offer a promising solution to overcome the endo-lysosomal pathway

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Drug Delivery

Background:

  • The endo-lysosomal pathway presents a major barrier to effective therapeutic agent delivery.
  • Overcoming this cellular bottleneck is crucial for improving treatment outcomes.

Purpose of the Study:

  • To review the potential of smart nanomaterials for enhancing cellular delivery.
  • To explore mechanisms by which these materials evade endosomal entrapment and improve therapeutic efficacy.

Main Methods:

  • Analysis of smart nanomaterial characteristics and delivery mechanisms.
  • Examination of assays for assessing endosomal escape and cellular uptake.
  • Scrutiny of specific evasion strategies like pore formation and proton sponge effects.

Main Results:

  • Smart nanomaterials demonstrate unique properties for strategic endosomal escape.
  • Various mechanisms, including pore formation and proton sponge effects, can mitigate entrapment.
  • Specific assays provide critical insights into cellular uptake and escape dynamics.

Conclusions:

  • Advanced delivery systems are needed to navigate cellular uptake complexities.
  • Smart nanomaterials represent a transformative approach to cellular delivery.
  • This strategy promises a paradigm shift towards improved therapeutic outcomes.