Publications by authors named "Pierre Oliver Couraud"

The factors implicated in the transition from uncomplicated to severe clinical malaria such as pulmonary oedema and cerebral malaria remain unclear. It is known that alterations in vascular integrity due to endothelial cell (EC) activation and death occur during severe malaria. In this study, we assessed the ability of different P.

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Alzheimer's disease (AD) has a characteristic hallmark of amyloid-β (Aβ) accumulation in the brain. This accumulation of Aβ has been related to its faulty cerebral clearance. Indeed, preclinical studies that used mice to investigate Aβ clearance showed that efflux across blood-brain barrier (BBB) and brain degradation mediate efficient Aβ clearance.

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We studied the effect of cilostazol, a selective inhibitor of phosphodiesterase 3, on barrier functions of blood-brain barrier (BBB)-related endothelial cells, primary rat brain capillary endothelial cells (RBEC), and the immortalized human brain endothelial cell line hCMEC/D3. The pharmacological potency of cilostazol was also evaluated on ischemia-related BBB dysfunction using a triple co-culture BBB model (BBB Kit™) subjected to 6-h oxygen glucose deprivation (OGD) and 3-h reoxygenation. There was expression of phosphodiesterase 3B mRNA in RBEC, and a significant increase in intracellular cyclic AMP (cAMP) content was detected in RBEC treated with both 1 and 10 μM cilostazol.

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Article Synopsis
  • Alzheimer's disease (AD) involves the buildup of Abeta peptides in the brain, leading to inflammation and neurodegeneration, particularly impacting human brain endothelial cells (HBEC).
  • In an experiment, exposure to Abeta(1-40) resulted in the increased expression of inflammatory genes, specifically MCP-1, GRO, IL-1beta, and IL-6, with this activation mirrored in actual AD and AD/CAA brain samples.
  • The study identified that the JNK-AP1 signaling pathway, particularly the activation of the c-Jun protein, plays a critical role in mediating this inflammatory response, suggesting it could be a potential target for new therapies in treating inflammation related to Alzheimer's disease.
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