| First Author | Zhang XL | Year | 2023 |
| Journal | Commun Biol | Volume | 6 |
| Issue | 1 | Pages | 967 |
| PubMed ID | 37783748 | Mgi Jnum | J:341935 |
| Mgi Id | MGI:7537704 | Doi | 10.1038/s42003-023-05304-0 |
| Citation | Zhang XL, et al. (2023) Myeloid cell deficiency of the inflammatory transcription factor Stat4 protects long-term synaptic plasticity from the effects of a high-fat, high-cholesterol diet. Commun Biol 6(1):967 |
| abstractText | Neuroinflammation is associated with neurodegenerative diseases, including Alzheimer's and Parkinson's. The cytokine interleukin-12 activates signal transducer and activator of transcription 4 (Stat4), and consumption of a high-fat, high-cholesterol diet (HFD-C) and Stat4 activity are associated with inflammation, atherosclerosis, and a diabetic metabolic phenotype. In studies of in vitro hippocampal slices from control Stat4(fl/fl)Ldlr(-/-) mice fed a HFD-C diabetogenic diet, we show that Schaffer collateral-CA1 synapses exhibited larger reductions in activity-dependent, long-term potentiation (LTP) of synaptic transmission, compared to mice fed a standard diet. Glucose tolerance and insulin sensitivity shifts produced by HFD-C diet were reduced in Stat4(DeltaLysM)Ldlr(-/-) mice compared to Stat4(fl/fl)Ldlr(-/-) controls. Stat4(DeltaLysM)Ldlr(-/-) mice, which lack Stat4 under control of the LysM(Cre) promoter, were resistant to HFD-C induced impairments in LTP. In contrast, Schaffer collateral-CA1 synapses in Stat4(DeltaLysM)Ldlr(-/-) mice fed the HFD-C diet showed larger LTP than control Stat4(fl/fl)Ldlr(-/-) mice. Expression of a number of neuroinflammatory and synaptic plasticity genes was reduced by HFD-C diet in control mice, and less affected by HFD-C diet in Stat4(DeltaLysM)Ldlr(-/-) mice. These data suggest that suppression of Stat4 activation may protect against effects of Western diet on cognition, type 2 diabetes, and reduce risk of Alzheimer's disease and other neurodegenerative disorders associated with neuroinflammation. |
