Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 33, Pages 18369-18378Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b04226
Keywords
perfluorocarbon emulsion; hypoxia-reoxygenation; ROS; HIF-1 alpha; pulmonary delivery
Funding
- National Key Technology Research and Development Program [2014BAK05B02]
- National Natural Science Foundation of China [51303135, 81172309]
- Minhang District Science and Technology Project [2014MH089]
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Perfluorocarbon (PFC), a kind of oxygen carrier, is encapsulated in PLGA-PEG to prepare a PLGA-PEG/PFC emulsion for highly efficient reoxygenation to cell and organism. HCT 116 cells are used as a model cell, whose viability has a significant enhancement after reoxygenation with PLGA-PEG/PFC emulsion because of the sufficient and timely oxygen supply. Meanwhile, hypoxia-reoxygenation injury will happen along with cell hypoxia-reoxygenation treatment, which is reflected by increasing reactive oxygen species (ROS) in cells. However, the integration of intracellular ROS and cell viability implies that the degree of hypoxia-reoxygenation injury is sublethal to HCT116 cells when the concentration of PLGA-PEG/PFC emulsion is lower than 0.2 mg/mL. Furthermore, the change of the expression level of hypoxia-inducible factor-1 alpha (HIF-1 alpha) is similar to that of cell viability during reoxygenation, which suggests that HIF-1 alpha or its downstream proteins may make a significant contribution to cell viability. In vivo oxygen supply is assessed in rats through pulmonary delivery, which shows that PLGA-PEG/PFC emulsion can supply oxygen to rats and improve rats' lung ventilation.
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