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Categories of Equilibrium01:30

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Equilibrium is a crucial concept in physics, enabling us to understand how forces interact with bodies to produce no or constant motion. In two-dimensional equilibrium, force systems can be classified into different categories based on their characteristics.
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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
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Related Experiment Video

Updated: Feb 12, 2026

Vascular Gene Transfer from Metallic Stent Surfaces Using Adenoviral Vectors Tethered through Hydrolysable Cross-linkers
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A new category stent with novel polyphosphazene surface modification.

Hiroyoshi Mori1, Hiroyuki Jinnouchi1, Chahal Diljon2

  • 1CVPath Institute, Gaithersburg, MD 20878, USA.

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The COBRA-PzF coronary stent, coated with Polyzene-F (PzF), shows promise for reducing stent thrombosis. This drug-free stent may offer a new option for high-risk bleeding patients.

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Area of Science:

  • Cardiovascular Medicine
  • Biomaterials Science
  • Medical Devices

Background:

  • Coronary stents are crucial in treating coronary artery disease.
  • Stent thrombosis remains a significant clinical concern.
  • Polyzene-F (PzF) is a novel coating investigated for its biocompatibility and antithrombotic properties.

Purpose of the Study:

  • To evaluate the safety and efficacy of the COBRA-PzF coronary stent.
  • To assess the antithrombotic and anti-inflammatory potential of the PzF coating.
  • To explore the suitability of the COBRA-PzF stent in patients at high risk for bleeding.

Main Methods:

  • The COBRA-PzF stent features a cobalt chromium backbone with a nanothin PzF coating.
  • Basic, preclinical, and clinical studies were reviewed to assess device performance.
  • Evaluation focused on stent thrombosis rates and patient outcomes, particularly in high-risk populations.

Main Results:

  • The PzF surface coating demonstrated evidence of antithrombotic and anti-inflammatory effects.
  • Preclinical studies confirmed the thromboresistance of PzF-coated surfaces.
  • Clinical studies reported favorable patient outcomes with very low rates of stent thrombosis.

Conclusions:

  • The COBRA-PzF stent exhibits a favorable safety profile with low stent thrombosis rates.
  • Its drug-free nature and thromboresistant properties make it a potential alternative for patients at high bleeding risk.
  • Further clinical trials are investigating shortened dual antiplatelet therapy durations, potentially establishing a new treatment paradigm.