| First Author | Shaftel SS | Year | 2007 |
| Journal | J Neurosci | Volume | 27 |
| Issue | 35 | Pages | 9301-9 |
| PubMed ID | 17728444 | Mgi Jnum | J:124945 |
| Mgi Id | MGI:3722979 | Doi | 10.1523/JNEUROSCI.1418-07.2007 |
| Citation | Shaftel SS, et al. (2007) Chronic interleukin-1beta expression in mouse brain leads to leukocyte infiltration and neutrophil-independent blood brain barrier permeability without overt neurodegeneration. J Neurosci 27(35):9301-9 |
| abstractText | The proinflammatory cytokine interleukin-1beta (IL-1beta) plays a significant role in leukocyte recruitment to the CNS. Although acute effects of IL-1beta signaling in the mouse brain have been well described, studies elucidating the downstream effects of sustained upregulation have been lacking. Using the recently described IL-1beta(XAT) transgenic mouse model, we triggered sustained unilateral hippocampal overexpression of IL-1beta. Transgene induction led to blood-brain barrier leakage, induction of MCP-1 (monocyte chemoattractant protein 1) (CCL2), ICAM-1 (intercellular adhesion molecule 1), and dramatic infiltration of CD45-positive leukocytes comprised of neutrophils, T-cells, macrophages, and dendritic cells. Despite prolonged cellular infiltration of the hippocampus, there was no evidence of neuronal degeneration. Surprisingly, neutrophils were observed in the hippocampal parenchyma as late as 1 year after transgene induction. Their presence was coincident with upregulation of the potent neutrophil chemotactic chemokines KC (keratinocyte-derived chemokine) (CXCL1) and MIP-2 (macrophage inflammatory protein 2) (CXCL2). Knock-out of their sole receptor CXCR2 abrogated neutrophil infiltration but failed to reduce leakage of the blood-brain barrier. |
