Transcriptomic Changes in Mouse Bone Marrow-Derived Macrophages Exposed to Neuropeptide FF.

Area of Science:

• Immunology
• Neuroendocrinology
• Transcriptomics

Background:

• Neuropeptide FF (NPFF) is recognized for diverse biological roles.
• Its specific regulatory influence on the immune system, particularly macrophages, remains incompletely understood.
• Elucidating NPFF's impact on macrophage gene expression is crucial for understanding immune modulation.

Purpose of the Study:

• To investigate the comprehensive effects of NPFF on the transcriptome of primary mouse bone marrow-derived macrophages (BMDMs).
• To identify key genes and pathways regulated by NPFF in BMDMs.
• To explore the structural and binding interactions between NPFF and its target proteins.

Main Methods:

• RNA sequencing was employed to analyze gene expression changes in NPFF-treated BMDMs.
• Bioinformatic analyses, including Gene Ontology (GO), KEGG pathway, and Protein-Protein Interaction (PPI) analyses, were performed on differentially expressed genes (DEGs).
• Molecular simulation techniques (Modeller, Rosetta, Gromacs) were used to determine the 3-D structures and binding modes of NPFF with identified hub proteins.

Main Results:

• A total of 2655 differentially expressed genes (DEGs) were identified, with 1442 upregulated and 1213 downregulated.
• Enrichment analyses indicated that NPFF extensively modulates multiple functional pathways in BMDMs.
• NPFF treatment significantly activated NPFF receptor 2 (NPFFR2) expression on the macrophage cell membrane.

Conclusions:

• NPFF profoundly influences a wide array of cellular processes in BMDMs by simultaneously upregulating and downregulating a large number of genes.
• The study identified eight hub genes and elucidated their structural interactions with NPFF.
• These findings provide essential transcriptomic data for further research into NPFF's physiological functions in macrophages and the immune system.