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- W4311667128 abstract "Rab GTPases are known for controlling intracellular membrane traffic in a GTP-dependent manner. Rab7l1, belonging to family of Rab GTPases, is important for both endosomal sorting and retrograde transport. In our previous study, we identified a novel role of Rab7l1 in phagosome maturation. However, its role in regulating macrophage innate-effector signaling and cytokine response is not clearly understood. In this study, we have demonstrated that upon treatment of Rab7l1-knocked-down (Rab7l1-KD) THP-1 macrophages with lipopolysaccharide (LPS) and Pam3CSK4 has led to higher induction levels of tumor necrosis factor-alpha (TNF-α) and interleukin-10 (IL-10) as compared to the control cells that received scrambled shRNA. Similar results were observed in Rab7l1-KD RAW 264.7 and Balb/c peritoneal macrophages. The phospho-ERK 1/2 (extracellular signal-regulated kinase 1/2) and phospho-p38 MAPK (mitogen-activated protein kinase) levels, known to be responsible for higher induction of TNF-α and IL-10 respectively, were higher in Rab7l1-KD THP-1 macrophages which also displayed higher nuclear translocation of p50/p65 nuclear factor kappa B (NF-κB) upon stimulation with LPS. Surface expression levels of toll-like receptor 2 (TLR2), TLR4 and CD14 receptors were higher in Rab7l1-KD THP-1 macrophages as compared to the control cells. However, intracellular levels of these receptors were lower in Rab7l1-KD THP-1 macrophages as compared to the control group. Together, our study suggests that Rab7l1 has a role in regulating MAPK signaling and cytokine effector responses in macrophages by regulating the surface expression of membrane receptors." @default.
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- W4311667128 date "2023-01-01" @default.
- W4311667128 modified "2023-10-14" @default.
- W4311667128 title "Rab7l1 plays a role in regulating surface expression of toll like receptors and downstream signaling in activated macrophages" @default.
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- W4311667128 doi "https://doi.org/10.1016/j.bbrc.2022.12.002" @default.
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