Ultrasound Detection of Regional Oxidative Stress in Deep Tissues Using Novel Enzyme Loaded Nanoparticles

Emilia S. Olson, Inanc Ortac, Christopher Malone, Sadik Esener, Robert Mattrey

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Oxidative stress is a powerful tool that is critical to immune mediated responses in healthy individuals, yet additionally plays a crucial role in development of cancer, inflammatory pathologies, and tissue ischemia. Despite this, there remain relatively few molecular tools to study oxidative stress, particularly in living mammals. To develop an intravenously injectable probe capable of labeling sites of oxidative stress in vivo, 200 nm catalase synthetic hollow enzyme loaded nanospheres (catSHELS) are designed and fabricated using a versatile enzyme nanoencapsulation method. catSHELS catalyze H2O2 to water and oxygen producing microbubbles that can be detected and imaged using a clinical ultrasound system. catSHELS are optimized in vitro to maximize ultrasound signal and their functionality is demonstrated in rat ischemic renal injury model. Ischemic oxidative injury is induced in a single kidney of normal rats by clamping the renal artery for 1 h followed by 2 h of reperfusion. Imaging of both kidneys is performed following the intravenous bolus injection of 1012 catSHELS of the optimized formulation. There is significant increase in ultrasound signal of the injured kidney relative to controls. This method offers a novel intravenous approach to detect oxidative stress in deep tissues in living animals.

Original languageEnglish (US)
JournalAdvanced healthcare materials
DOIs
StateAccepted/In press - 2017
Externally publishedYes

Fingerprint

Oxidative stress
Nanospheres
Nanoparticles
Oxidative Stress
Enzymes
Ultrasonics
Catalase
Tissue
Kidney
Rats
Microbubbles
Mammals
Wounds and Injuries
Pathology
Renal Artery
Constriction
Intravenous Injections
Labeling
Reperfusion
Animals

Keywords

  • Acute kidney injury
  • Ischemia reperfusion injury
  • Nanoparticles
  • Nanotechnology

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Pharmaceutical Science

Cite this

Ultrasound Detection of Regional Oxidative Stress in Deep Tissues Using Novel Enzyme Loaded Nanoparticles. / Olson, Emilia S.; Ortac, Inanc; Malone, Christopher; Esener, Sadik; Mattrey, Robert.

In: Advanced healthcare materials, 2017.

Research output: Contribution to journalArticle

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