Journal
JOURNAL OF NEURAL TRANSMISSION
Volume 122, Issue 7, Pages 1069-1076Publisher
SPRINGER WIEN
DOI: 10.1007/s00702-015-1369-5
Keywords
Sporadic Alzheimer's disease; Neuroinflammation; CX3CL1; TREM2; PPAR gamma
Categories
Funding
- Dr. med. Edda Neele-Stiftung'', Frankfurt/Main, Germany
- Interdisciplinary Center for Clinical Research (IZKF), University of Wuerzburg, Germany
- Medical Research Council [G9318379, MR/L016397/1, G1100695] Funding Source: researchfish
- MRC [G1100695, G9318379, MR/L016397/1] Funding Source: UKRI
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The role of neuroinflammation in the pathogenesis of neurodegenerative diseases has become more evident in recent years. Research on the etiology and pathogenesis of sporadic Alzheimer's disease (AD) has focused on the role of chemokines such as CX3CL1, on the triggering receptors expressed by myeloid cells (TREMs), especially TREM2, and on the transcription factor/nuclear hormone receptor peroxisome proliferator-activated receptor gamma (PPAR gamma). Here we analyzed the expression levels of CX3CL1, TREM2, and PPAR gamma in tissue homogenates from human brain regions that have different degrees of vulnerability to neuropathological AD-related changes to obtain insights into the pathogenesis and progression of AD. We found that CX3CL1 and TREM2, two genes related to neuroinflammation, are more highly expressed in brain regions with pronounced vulnerability to AD-related changes, such as the hippocampus, and that the expression levels reflect the course of the disease, whereas regions with low vulnerability to AD, seemed generally less affected by neuroinflammation. Furthermore, our results support previous findings of significantly higher CX3CL1 plasma levels in patients with mild to moderate AD than in patients with severe AD. Thus, CX3CL1 should be considered as promising additional marker for the early diagnosis of AD and underlines once more, the involvement of the neuroinflammation in the pathogenesis of this neurodegenerative disease.
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