Abstract
Studies have shown that progesterone enhances functional recovery after ischemic stroke, but the underlying mechanisms are not completely understood. Therefore, we investigated the effect of progesterone on vascular endothelial growth factor (VEGF), brain-derived neurotrophic factor (BDNF), and neurogenesis in a rodent stroke model. Rats underwent permanent middle cerebral artery occlusion (pMCAO) and then received intraperitoneal injections of progesterone (15 mg/kg) or vehicle at 1 h followed by subcutaneous injections at 6, 24, and 48 h. We examined VEGF and BDNF expression by Western blotting and/or immunostaining and microvessel density by lectin immunostaining. Neurogenesis in the subventricular zone was determined by immunostaining of Ki67 and doublecortin, and double BrdU/Nestin immunostaining. We calculated brain water content with the wet-dry weight method on day 3 and assessed neurologic deficits with the modified neurological severity score on days 1, 3, 7, and 14. Progesterone-treated rats showed a significant decrease in VEGF expression, but an increase in BDNF expression, compared with that of vehicle-treated pMCAO rats on day 3 post-occlusion. Progesterone did not alter the microvessel density, but it reduced brain water content compared with that in vehicle-treated rats on day 3 post-occlusion. Progesterone treatment increased the numbers of newly generated neurons in the subventricular zone and doublecortin-positive cells in the peri-infarct region on day 7 post-occlusion. In addition, progesterone improved neurologic function on days 7 and 14 post-occlusion. Our data suggest that the enhancement of endogenous BDNF and subsequent neurogenesis could partially underlie the neuroprotective effects of progesterone.
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18 May 2023
A Correction to this paper has been published: https://doi.org/10.1007/s12035-023-03384-x
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Acknowledgments
This work was supported by grants from the National Natural Science Foundation of China (81301006), American Heart Association grant 13GRNT15730001, and the National Institutes of Health (R01NS078026, R01AT007317). We thank Claire Levine for assistance with this manuscript.
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Highlights
• Rats underwent a permanent middle cerebral artery occlusion model of stroke.
• Progesterone increased BDNF but decreased VEGF on day 3 post-occlusion.
• Progesterone reduced brain edema.
• Progesterone increased neurogenesis and improved functional outcome.
• Progesterone treatment provides a therapeutic effect after ischemic stroke.
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Jiang, C., Zuo, F., Wang, Y. et al. Progesterone Changes VEGF and BDNF Expression and Promotes Neurogenesis After Ischemic Stroke. Mol Neurobiol 54, 571–581 (2017). https://doi.org/10.1007/s12035-015-9651-y
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DOI: https://doi.org/10.1007/s12035-015-9651-y