Journal: bioRxiv
Article Title: Mast cell-driven adipocyte lipolysis promotes post-expansive VAT atrophy and ectopic hepatic steatosis
doi: 10.64898/2026.01.07.698076
Figure Lengend Snippet: ( a ) Heatmap of MC mediator-related gene expression in EAT in WT mice at week 0 and at week 10 of HFD feeding. n=3/ea. ( b ) Real-time PCR analysis of MC mediator-related genes Mcpt4 (encodes mouse mast cell protease 4 (mMCP-4), Cma1 (encodes mMCP-5), Hdc (encodes histidine decarboxylase), Ext1 (encodes exostosin-1), Ext2 , Ndst1 (encodes N-deacetylase/N-sulphotransferase 1), Ndst2 , Tph1 (encodes tryptophan hydroxylase 1), and Hpgds (encodes hematopoietic prostaglandin D synthase) in EAT in WT mice at week 0, 10, 20 of HFD feeding. n=6-8/ea. ( c/d ) Serum ( c ) and EAT ( d ) 5-HT levels in HFD-fed WT mice. n=6-8/ea. ( e ) EAT 5-HT levels in WT mice received i.p. injections of saline or DSCG from week 0 to 20 of HFD feeding. n=6-8/ea. ( f ) Real-time PCR analysis of Tph1 mRNA levels in adipocytes, SVFs, MC-depleted SVFs, and MCs from WT EAT in HFD-fed mice for 16 weeks. n=5-8/ea. ( g ) 5-HT + (red) and CD117 + (green), 5-HT + (red) and FceRI + (green) immunofluorescent double staining in WT EAT in HFD-fed mice for 16 weeks. ( h ) Correlations between serum LDL and 5-HT levels, IgE and 5-HT levels, LDL and NEFA levels, IgE and NEFA levels, and 5-HT and NEFA levels during EAT atrophy in HFD-fed mice. n=27. ( i ) Correlations between serum LDL and 5-HT levels, IgE and 5-HT levels, LDL and NEFA levels, IgE and NEFA levels, and 5-HT and NEFA levels in MASLD patients. n=50. ( j - l ) Differentiated 3T3-L1 adipocytes were treated with or without live BMMCs, BMMC lysates, LDL, LDL-activated BMMCs, DSCG- and LDL-treated BMMCs, or 5-HT. n=3/ea. ( j ) Representative images of oil-red O staining, media glycerol and NEFA levels in 3T3-L1 adipocytes. Scale bars: 50 µm. ( k/l ) Immunoblot analysis ( k ) and quantification of ( l ) ATGL, HSL and SIRT1 relative to β-actin, p-HSL(565) and p-HSL(563) relative to HSL, and p-AMPKα relative to AMPKα in 3T3-L1 adipocytes. Data are mean ± SEM. Pearson’s correlation test for h and i . P < 0.05 was considered significant correlation. Mann-Whitney U test for e . Kruskal-Wallis H test with Dunn’s post hoc adjustment for b-d , and f . Welch’s t-test for j and l . * p < 0.05, ** p < 0.01, *** p < 0.001. Different letters indicate statistically significant difference.
Article Snippet: To activate BMMCs, the cells were treated with 1 mg/mL LDL (Lee Biosolutions, Inc, Maryland Heights, MO Cat# 360-10).
Techniques: Gene Expression, Real-time Polymerase Chain Reaction, Histone Deacetylase Assay, Saline, Double Staining, Staining, Western Blot, MANN-WHITNEY