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OGD (Oxygen-Glucose Deprivation) is an in vitro model for ischemia stroke.
In an experimental model for ischemia, HBO reduces immunocompetent cell sequestration and the synthesis of TNF-α [24]; probably by decreasing ICAM-1 expression levels [25].
The induced method involved treatment with specific chemicals (e.g., 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) or streptozotocin (STZ)[ 25- 27], whereas the surgical method (e.g., middle cerebral artery occlusion model for ischemia) were created through specific types of surgery [ 28].
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We chose CA/CPR as our model for ischemia-reperfusion injury because it replicates key features of clinical ischemia-reperfusion, making it clinically relevant.
Another reason for the disparity in findings may be the use of animal models for ischemia reperfusion injury.
Here, we indicate that LDPI strongly underestimates perfusion recovery in a hind limb model for profound ischemia.
Here, we describe a long-term recovery mouse model for cerebral ischemia in which a brief transient occlusion of the middle cerebral artery (30 min) was followed by up to 30 days of long-term reperfusion.
Future studies testing neovascularization stimulating agents in a hind limb model for profound ischemia should take into account that the window of opportunity is short and that this window can be ascertained using molecular perfusion/myocyte damage tracers like 99mTc-sestamibi and/or 99mTc-PyP.
While femoral artery occlusion in a mouse is a simple model for limb ischemia compared to the slowly progressive disease in humans, the results of this study support the value of radiolabeled RGD as a non-invasive tool to follow the angiogenic response to modifications in factors affecting the angiogenic response to tissue hypoxia.
In an experimental model for cerebral ischemia, HBO neuroprotection was not achieved in animals submitted to pure oxygen at only 1.0 ATA [39], [40], and human stimulated monocyte-macrophages cultured in hyperoxia did not present changes in their cytokine expression levels [23].
A frequently used model for retinal ischemia is established by using elevated IOP.
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