15-deoxy-Delta12,14-PGJ2 (15d-PGJ2), a ligand of the nuclear receptor peroxisome proliferator-activated receptor gamma (PPARgamma), mediates repression of TNFalpha by decreasing levels of acetylated H4

Engdahl, Ryan; Monroy, Alexandra; Daly, J.M.

doi:10.1016/j.jamcollsurg.2006.05.082

Cited by 1 publication

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“…7D). As 15d-PGJ 2 is the natural ligand of PPARγ [39], the addition of the PPARγ antagonist GW9662 alleviated the suppressive effects of 15d-PGJ 2 on the expression of APH-1α/1β and PS1 in n2a cells (Fig. 7D).…”

Section: Resultsmentioning

confidence: 93%

Transferrin is responsible for mediating the effects of iron ions on the regulation of anterior pharynx-defective-1α/β and Presenilin 1 expression via PGE2 and PGD2 at the early stage of Alzheimer’s Disease

Lü

Luo

et al. 2018

Aging

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Transferrin (Tf) is an important iron-binding protein postulated to play a key role in iron ion (Fe) absorption via the Tf receptor (TfR), which potentially contributes to the pathogenesis of Alzheimer’s disease (AD). However, the role of Tf in AD remains unknown. Using mouse-derived neurons and APP/PS1 transgenic (Tg) mice as model systems, we firstly revealed the mechanisms of APH-1α/1β and presenilin 1 (PS1) upregulation by Fe in prostaglandin (PG) E2- and PGD2-dependent mechanisms. Specifically, Fe stimulated the expression of mPGES-1 and the production of PGE2 and PGD2 via the Tf and TfR system. Highly accumulated PGE2 markedly induced the expression of anterior pharynx-defective-1α and -1β (APH-1α/1β) and PS1 via an EP receptor-dependent mechanism. In contrast, PGD2 suppressed the expression of APH-1α/1β and PS1 via a prostaglandin D2 (DP) receptor-dependent mechanism. As the natural dehydrated product of PGD2, 15d-PGJ2 exerts inhibitory effects on the expression of APH-1α/1β and PS1 in a peroxisome proliferator-activated receptor (PPAR) γ-dependent manner. The expression of APH-1α/1β and PS1 ultimately determined the production and deposition of β-amyloid protein (Aβ), an effect that potentially contributes to the pathogenesis of AD.

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Section: Resultsmentioning

confidence: 93%