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Nitric Oxide Signaling Pathway01:28

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Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
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Controlled Delivery of Nitric Oxide Using Porous Organic Cages.

Zhe Jia1, Dingyue Hu1, Yaoyi Su1

  • 1Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310058, China.

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Porous organic cages (POCs) show promise for nitric oxide (NO) delivery. These materials form NONOates, enabling controlled NO release for biomedical applications.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Gas therapy is a promising biomedical field.
  • Existing gas delivery materials have limitations like low loading capacity and biotoxicity.
  • Porous organic cages (POCs) offer advantages for gas adsorption and separation.

Purpose of the Study:

  • To investigate porous organic cages (POCs) for nitric oxide (NO) delivery.
  • To explore the dual adsorption mechanisms of POCs for NO.
  • To establish POCs as a viable platform for NO delivery in biomedical applications.

Main Methods:

  • Experimental characterization of POCs.
  • Density functional theory (DFT) calculations.
  • High-resolution mass spectroscopy to analyze NONOate formation.

Main Results:

  • POCs demonstrate dual adsorption capabilities (physisorption and chemisorption) for NO.
  • Amine-functionalized POCs react with NO to form NONOates.
  • Controlled NO release from NONOates under physiological conditions was achieved.

Conclusions:

  • POCs are a promising platform for nitric oxide (NO) delivery.
  • The formation of NONOates in POCs allows for controlled NO release.
  • POCs have broader potential for gas therapy and other biomedical applications.