Journal: Biology

Article Title: sTREM2 Differentially Affects Cytokine Expression in Myeloid-Derived Cell Models via MAPK-JNK Signaling Pathway.

doi: 10.3390/biology13020087

Figure Lengend Snippet: Figure 3. The effects of a TREM2 antibody (mAb) on sTREM2-induced cytokine expression: THP-1 cells were treated with 0.1 µg/mL sTREM2, mAb, or both sTREM2+mAb for 2, 4, 6, and 8 h, and cytokine expression of (A) TNF-α, (B) IL-1β, (C) TARC, and (D) IL-10 was assessed using qPCR. Data presented as Mean + SD.

Article Snippet: A commercially available rat anti-human IgG2B TREM2 antibody (R&D Systems) was used to assess the antibody’s ability to bind and neutralize sTREM2.

Techniques: Expressing

Journal: Biology

Article Title: sTREM2 Differentially Affects Cytokine Expression in Myeloid-Derived Cell Models via MAPK-JNK Signaling Pathway.

doi: 10.3390/biology13020087

Figure Lengend Snippet: Figure 4. Inhibition of NLRP-3 inflammasome-mediated release of IL-1β induced by the complex of sTREM2+mAb. THP-1 cells were treated for 6 h with 0.1 µg/mL sTREM2, TREM2 antibody (mAb), or 0.1 µg/mL sTREM2+mAb (a monoclonal TREM2 antibody) and 0.1 µg/mL sTREM2+mAb with a selective NLRP3 inhibitor MCC950 (7.5 nM). Data presented as Mean + SD. * p < 0.05; ** p < 0.01; *** p < 0.001.

Article Snippet: A commercially available rat anti-human IgG2B TREM2 antibody (R&D Systems) was used to assess the antibody’s ability to bind and neutralize sTREM2.

Techniques: Inhibition

Journal: Biology

Article Title: sTREM2 Differentially Affects Cytokine Expression in Myeloid-Derived Cell Models via MAPK-JNK Signaling Pathway.

doi: 10.3390/biology13020087

Figure Lengend Snippet: Figure 6. The effects of Syk, NFκB, and JNK inhibitors on sTREM2-induced cytokine expression (A). The effect of TREM2 inhibitor piceatannol (15 µM) on cytokine expression; (B). The effect of MG-132 (100 nM) on cytokine expression; (C). The effect of JNK inhibitor SP600125 (90 nM) on cytokine. Data presented as Mean + SD.

Article Snippet: A commercially available rat anti-human IgG2B TREM2 antibody (R&D Systems) was used to assess the antibody’s ability to bind and neutralize sTREM2.

Techniques: Expressing

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: High-fat diet feeding increases cleaved TREM2 and TREM2 levels in gonadal white adipose tissue (A) Immunoblot analysis of TREM2 and cleaved TREM2 levels in gonadal white adipose tissue (GWAT), inguinal white adipose tissue (IWAT), and brown adipose tissue (BAT) of mice fed a high-fat diet (HFD) and normal chow diet (NCD) for 4 and 8 weeks ( n = 6 mice per group). (B) ELISA-based quantification of soluble TREM2 (sTREM2) levels in mouse serum ( n = 3 mice per group). (C) Schematic diagram illustrating cleaved membrane-bound TREM2 and soluble TREM2 forms. Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Western Blot, Enzyme-linked Immunosorbent Assay, Membrane

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: HFD feeding upregulates Adam10 and Adam17 expression in monocyte/macrophage populations of GWAT (A) Immunoblot analysis of ADAM10 and ADAM17 protein expression in gonadal white adipose tissue (GWAT) of mice after 8 weeks of NCD or HFD feeding ( n = 6 mice per group). (B) Umap plot of Adam10 , Adam17 , and total nuclei isolated from GWAT of NCD and HFD-fed mice (PRJNA942977). Clusters are colored by cell types: adipocyte, mesothelial cell, lymphatic endothelial cell, vascular endothelial cell, adipocyte progenitor cell, smooth muscle cell (SMC), monocyte/macrophage (mono/mac), dendritic cell (DC), B cell, and T cell. (C) Violin plot of Adam10 and Adam17 gene expression levels in total cell types from GWAT of NCD- and HFD-fed mice. (D) Umap plot of Adam10 , Adam17 from monocyte/macrophage population in GWAT of NCD- and HFD-fed mice (PRJNA942977). Clusters are colored by cell types: Lyve1 +macrophage (Mac. Lyve1 ), Trem2 +macrophage (Mac. Trem2 ), Prg4 +macrophage (Mac. Prg4 ), and monocyte. (E) Bubble plot and violin plot of Adam10 and Adam17 expression levels in distinct cell populations from mouse GWAT, determined by single-nucleus RNA sequencing (PRJNA942977). (F) qPCR analysis of Adam10 and Adam17 mRNA expression in isolated F4/80+ macrophages and adipocytes from GWAT after 8 weeks of NCD or HFD feeding ( n = 3 mice per group). Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Expressing, Western Blot, Isolation, Gene Expression, RNA Sequencing

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: Obesity increases ADAM10 and ADAM17 expression in macrophage populations of WAT (A) ADAM10 and ADAM17 expression levels in total cell types of human visceral adipose tissues ( GSE176171 ). Clusters are colored by cell types: Adipocyte, adipose stem and progenitor cells (ASPC), mesothelium, endothelial cell, lymphatic endothelial cell (LEC), pericyte, smooth muscle cell (SMC), macrophage, monocyte, dendritic cell (DC), mast cell, neutrophil, B cell, natural killer cell (NK cell), T cell, and endometrium cell. (B) Bubble plot and violin plot of ADAM10 and ADAM17 gene expressions and representative markers in adipocyte and macrophage populations with body mass index (BMI) in human subcutaneous adipose tissue ( GSE176171 ). (C) Violin plot of TREM2 , ADAM10 , and ADAM17 gene expression levels in human macrophage sub-populations (hMac1, hMac2, hMac3). (D) Correlation analysis of ADAM10 and ADAM17 gene expression levels with BMI in human subcutaneous adipose tissue ( n = 12 patients per group). Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Expressing, Gene Expression

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: Apoptotic adipocytes fail to induce TREM2 shedding in RAW264.7 cells and bone marrow-derived macrophages (BMDMs) (A) Schematic diagram illustrating the experimental method used for co-culturing dying/dead adipocytes with RAW264.7 cells or BMDMs. Apoptotic adipocytes (aAC) were generated by treating differentiated 3T3-L1 adipocytes with brefeldin A (BFA; 5 μg/mL for 24 h). Apoptotic adipocytes (1 × 10 5 cells/well) were directly co-cultured with RAW264.7 cells or BMDMs (5 × 10 5 cells/well) in growth medium. After 24 h of co-culture, non-engulfed or floating apoptotic adipocytes were removed by PBS washing, and RAW264.7 cells or BMDMs were subsequently harvested for immunoblot analysis. (B) Immunoblot analysis of caspase-3 expression levels in 3T3-L1 adipocytes after BFA for 24 h ( n = 3 cells per group). (C) and (D) Immunoblot analysis of TREM2, ADAM10, and ADAM17 protein expression levels in RAW264.7 cells (C) and BMDMs (D) co-cultured with apoptotic adipocytes ( n = 3 cells per group). Black arrow and red arrow indicate each precursor form of ADAM10/17 and active form of ADAM10/17. Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Derivative Assay, Generated, Cell Culture, Co-Culture Assay, Western Blot, Expressing

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: GM6001 blocks TREM2 shedding in RAW264.7 cells induced by pyroptotic adipocytes (A) A schematic diagram illustrating the experimental method used for co-culturing pyroptotic adipocytes with macrophages. Pyroptotic adipocytes were generated by treating differentiated 3T3L1 adipocytes with lipopolysaccharide (LPS; 100 μg/μL, 48 h) followed by ATP (2 mM, 24 h). Pyroptotic adipocytes (1 × 10 5 cells/well) were directly co-cultured with RAW264.7 cells (5 × 10 5 cells/well) or BMDMs for 24 h in growth medium. After co-culture, non-engulfed or floating pyroptotic adipocytes were removed by PBS washing, and RAW264.7 cells and BMDMs were subsequently harvested for immunoblot analysis. (B) Immunoblot analysis of NLRP3, caspase-1, and GSDMD (gasdermin D) expression levels in 3T3-L1 adipocytes after LPS priming for 48 h and ATP treatment for 24 h ( n = 3 cells per group). Black arrow and red arrow indicate each total form of GSDMD and cleaved GSDMD. (C) Immunoblot analysis of TREM2, ADAM10, and ADAM17 expression levels in RAW264.7 cells co-cultured with pyroptotic adipocytes for 24 h in the presence or absence of GM6001 ( n = 4 cells per group). Black arrow and red arrow indicate each precursor form of ADAM10/17 and active form of ADAM10/17. (D) Immunoblot analysis of P-STING and STING expression levels in RAW264.7 cells co-cultured with pyroptotic adipocytes ( n = 3 cells per group). (E) Immunoblot analysis of P-syk, syk, P-PI3K, PI3K, P-PLCγ1, PLCγ1, P-AKT, and AKT protein levels in RAW264.7 cells co-cultured with pyroptotic adipocytes ( n = 3 cells per group). (F) Phagocytosis analysis of RAW264.7 cells co-cultured with pyroptotic adipocytes for 18 h in the presence of GM6001. Adipocytes were tagged with C12-BODIPY (red), and macrophages were stained with DiO (green). Representative images from three independent experiments are shown, with quantification provided in the right panel. Scale bars, 100 μm. Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Generated, Cell Culture, Co-Culture Assay, Western Blot, Expressing, Staining

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: GM6001 prevents the cleavage of TREM2 on BMDMs induced by pyroptotic adipocytes (A) Immunoblot analysis of TREM2, ADAM10, and ADAM17 expression levels in BMDMs co-cultured with pyroptotic adipocytes for 24 h in the presence or absence of GM6001 ( n = 3 cells per group). Black arrow and red arrow indicate each precursor form of ADAM10/17 and active form of ADAM10/17. (B) and (C) Phagocytosis analysis of BMDMs, (B) TREM2 knockdown BMDMs, and negative control (NC). (C) co-cultured with pyroptotic adipocytes for 18 h in the presence of GM6001. Adipocytes were tagged with C12-BODIPY (red), and macrophages were stained with DiO (green). Representative images from three independent experiments are shown, with quantification provided in the right panel. The yellow boxes indicate the regions shown in the magnified images. Scale bars, 200 μm. Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Western Blot, Expressing, Cell Culture, Knockdown, Negative Control, Staining

Journal: iScience

Article Title: Obesity-induced pyroptotic adipocyte death leads to TREM2-dependent macrophage dysfunction and adipose tissue inflammation

doi: 10.1016/j.isci.2025.114358

Figure Lengend Snippet: GM6001 treatment reduces TREM2 shedding and HFD-induced inflammation in GWAT (A) Schematic illustration of the experimental strategy for GM6001 administration (7.5 mg/kg/2 days) in mice fed a high-fat diet (HFD) for 10 weeks. (B) Immunoblot analysis of TREM2, ADAM10, and ADAM17 protein levels in gonadal white adipose tissue (GWAT) of HFD-fed mice treated with or without GM6001 ( n = 4 mice per group). (C) Measurement of soluble TREM2 (sTREM2) levels in the serum of NCD- or HFD-fed mice treated with GM6001 for 10 weeks ( n = 3 mice per group). (D–F) Representative flow profile and quantification of (D) CD11B + CD45 + cells (E) M2/M1 macrophage ratio (CD206 + CD11C − CD45 + CD11B + /CD11C + CD206 − CD45 + CD11B + ), and (F) TREM2 + CD11C + and TREM2 + CD206 + macrophage populations in GWAT of GM6001-treated mice after feeding HFD for 10 weeks ( n = 4 mice per group). (G) Immunofluorescence staining of F4/80 (green) with DAPI (blue) counterstaining in paraffin-embedded GWAT sections from GM6001-treated and control mice ( n = 4 mice per group, scale bars, 100 μm). (H) Immunoblot analysis of P-STING, STING, NLRP3, F4/80, and caspase-1 expression levels in GWAT of HFD-fed mice treated with or without GM6001 ( n = 4 mice per group). Data are presented as mean values ± SEM. p values were determined by the unpaired two-sided Student’s t test and were annotated directly in the figure at the corresponding comparisons.

Article Snippet: Human/Mouse TREM2 Allophycocyanin Mab (FAB17291A, 1:50) were purchased from R&D systems.

Techniques: Western Blot, Immunofluorescence, Staining, Control, Expressing

Journal: bioRxiv

Article Title: CD36-Pyruvate Kinase M2 Signaling Promotes Macrophage Phagocytosis Through Mitochondrial Reactive Oxygen Species

doi: 10.1101/2023.09.07.556574

Figure Lengend Snippet: A , a diagram of the ex vivo mtROS and phagocytosis assay. B , Total amount of aortic F4/80 + /Trem2 + macrophages were quantified and shown in the bar graph; n=4-7 individual mice per group. C , MitoNeoD MFI was quantified in aortic F4/80 + /Trem2 + macrophages and shown in the bar graph; n=5 individual mice per group. D , pHrodo MFI was quantified in aortic F4/80 + /Trem2 + macrophages and shown in the bar graph; n=5-6 individual mice per group. E , a diagram of the in vivo phagocytosis assay. F , pHrodo MFI was quantified in aortic F4/80 + /Trem2 + macrophages and shown in the bar graph; n=5-7 individual mice per group.

Article Snippet: For phagocytosis assays, the filtered single-cell suspension was incubated with 20 μg/ml pHrodo-conjugated E. coli bioparticles in RPMI1640 with 10% FBS at 37°C for 30 min, followed by immunostaining with PE/Cy5-conjugated F4/80 antibody (BioLegend, Cat#123111) and PE-conjugated Trem2 antibody (R&D Systems, Cat#FAB17291P) in Flow Buffer at RT for 15 min in the dark.

Techniques: Ex Vivo, Phagocytosis Assay, In Vivo

Journal: bioRxiv

Article Title: CD36-Pyruvate Kinase M2 Signaling Promotes Macrophage Phagocytosis Through Mitochondrial Reactive Oxygen Species

doi: 10.1101/2023.09.07.556574

Figure Lengend Snippet: A-D , Mouse scRNA-seq data were re-analyzed from a previous publication . Uniform manifold approximation and projection (UMAP) representation of 11 aortic CD45 + immune cell clusters were shown in A . Trem2 gene expression pattern ( B ) and Pkm gene expression pattern ( C ) were shown in the UMAP. D , Violin plots show the Pkm and Trem2 expression distribution among aortic macrophage subpopulations. ResMac: resident macrophages; InflaMac: inflammatory macrophages. E , HMDMs transfected with PKM siRNA were treated with 50 μg/ml oxLDL for 24 h before subjected to mtROS assay (left panel) or phagocytosis assay (right panel). MFI was quantified and shown in the bar graph; n=4-5 per group. F , Representative confocal images of macrophages immunostained for PKM2 (green) and Tom20 (red). Nuclei were stained by DAPI (blue). Scale bar: 5 μm. G , HMDMs treated with 20 μg/ml LDL (control) or oxLDL for 3 h were lysed, subjected to cell fractionation into mitochondrial and cytosol fractions. PKM2 and ATP5A (mitochondria fraction loading control) blot images from mitochondrial fractions were shown on the left. PKM2 and β-actin (cytosol fraction loading control) blot images from cytosol fractions were shown on the right. Images were quantified, normalized to each loading control, and expressed as fold change of control. n=4 per group. H , WT or Cd36 -null peritoneal macrophages treated with 20 μg/ml LDL (control) or oxLDL for 3 h and then processed as in G. Mitochondrial fractions were immunoblotted for PKM2 and ATP5A and blot images were shown. Images were quantified, normalized, and expressed as fold change of control. n=4 per group. I , WT macrophages treated with 20 μg/ml oxLDL or pre-treated 1 or 5μM shikonin before addition of oxLDL, incubating for 3 h, and then processed as in G. Mitochondrial fractions were immunoblotted for PKM2 and Tom20 and blot images were shown. Images were quantified and expressed as fold change of control. n=3 per group. J , WT macrophages pre-treated with 20 μg/ml oxLDL or in combination with 1 μM shikonin for 24 h before mtROS or phagocytosis assay. The MitoNeoD (left) or pHrodo (right) MFI was quantified and shown in the bar graph; n=3-4 per group.

Article Snippet: For phagocytosis assays, the filtered single-cell suspension was incubated with 20 μg/ml pHrodo-conjugated E. coli bioparticles in RPMI1640 with 10% FBS at 37°C for 30 min, followed by immunostaining with PE/Cy5-conjugated F4/80 antibody (BioLegend, Cat#123111) and PE-conjugated Trem2 antibody (R&D Systems, Cat#FAB17291P) in Flow Buffer at RT for 15 min in the dark.

Techniques: Gene Expression, Expressing, Transfection, Phagocytosis Assay, Staining, Control, Cell Fractionation

Journal: Brain, behavior, and immunity

Article Title: Profiling TREM2 expression in amyotrophic lateral sclerosis.

doi: 10.1016/j.bbi.2023.01.013

Figure Lengend Snippet: Fig. 2. TREM2 mRNA expression profiling in human spinal cord in ALS. (A) The figure illustrates the maps of the 3 different TREM2 transcript variants. Black boxes represent exons, and arrows represent transcription start sites. (B) Overall TREM2 mRNA levels in the spinal cord in ALS samples (n = 21) were compared with controls (n = 19) as shown in the graph. (C) The dot-plot graph shows mRNA expression of the 3 TREM2 variants in human spinal cord specimens. (D–F) The panels show mRNA expression levels in ALS patients when compared with controls for each of the TREM2 transcript variant. Data represent the mean value ± SD. *p value < 0.05; **p value < 0.01; ***p value < 0.001; ****p value < 0.0001.

Article Snippet: CSF and serum levels of sTREM2 in ALS patients and controls were determined by a commercial enzyme-linked immunoabsorbent assay (ELISA), the Human TREM2 DuoSet ELISA (Catalog number: DY182805; R&D systems, Minneapolis, MN, USA) according to manufacturer’s instructions.

Techniques: Expressing, Variant Assay

Journal: Brain, behavior, and immunity

Article Title: Profiling TREM2 expression in amyotrophic lateral sclerosis.

doi: 10.1016/j.bbi.2023.01.013

Figure Lengend Snippet: Fig. 3. TREM2 protein expression is increased in spinal cord from ALS patients by western blot analysis. (A) Spinal cord samples from controls and ALS patients were loaded as labeled on top of lanes. β-actin expression is shown as reference control. (B) The bar chart represents the quantitative measurement of TREM2 relative to β-actin protein expression (n = 10). Data represent the mean value ± Standard Error of the Mean (SEM). **p value < 0.01.

Article Snippet: CSF and serum levels of sTREM2 in ALS patients and controls were determined by a commercial enzyme-linked immunoabsorbent assay (ELISA), the Human TREM2 DuoSet ELISA (Catalog number: DY182805; R&D systems, Minneapolis, MN, USA) according to manufacturer’s instructions.

Techniques: Expressing, Western Blot, Labeling, Control