human monocytic leukemia cell line  (ATCC)

Journal: Regenerative Therapy

Article Title: Lung cancer cell-derived exosomal EHF drives M2 macrophage polarization via transcriptional activation of RNF41 to promote tumor progression

doi: 10.1016/j.reth.2026.101104

Figure Lengend Snippet: EHF promotes lung cancer cell malignancy and M2 macrophage polarization. A549 and H520 cells were transfected with control (Ctrl) or EHF-knockdown (KD-EHF) plasmids. (A-B) Western blot and quantification of EHF protein levels in A549 and H520 cells. (C-D) EdU staining and quantification of EdU + cells in A549 and H520 cells, assessing proliferation. (E-H) Glucose uptake and lactate production assays were conducted using commercial kits to evaluate glycolytic output. (I-J) Flow cytometric analysis of apoptosis. (K-L) Transwell assay was employed to examine cell migration. (M − P) THP-1 cells were differentiated into THP-1-M0 macrophages with 100 ng/mL PMA for 24 h. Culture supernatants from Ctrl- or KD-EHF–transfected A549 and H520 cells were collected and co-incubated with THP-1-M0 macrophages. (M − N) Flow cytometric analysis was performed to assess the proportion of CD206 + M2-polarized macrophages. (O–P) ELISA was conducted to quantify the secretion of M2-associated cytokines (TGF-β1, IL-10, and VEGFA) in the supernatants of THP-1-M0 macrophages. Data are presented as mean ± SD. P < 0.05 denotes statistical significance.

Article Snippet: Human monocyte cell line (THP-1) (Catalog #: YC-D011) were purchased from Guangzhou Ubigene Biosciences Co., Ltd. (Guangzhou, China) and cultured in RPMI-1640 (Gibco) containing 10% FBS (Gibco).

Techniques: Transfection, Control, Knockdown, Western Blot, Staining, Transwell Assay, Migration, Incubation, Enzyme-linked Immunosorbent Assay

Journal: Regenerative Therapy

Article Title: Lung cancer cell-derived exosomal EHF drives M2 macrophage polarization via transcriptional activation of RNF41 to promote tumor progression

doi: 10.1016/j.reth.2026.101104

Figure Lengend Snippet: Exosomes derived from lung cancer cells are internalized by THP-1-M0 macrophages and mediate EHF delivery. Exosomes were isolated from A549 and H520 cells. (A) TEM images showed the typical cup-shaped morphology of exosomes isolated from A549 and H520 cell supernatants (scale bar: 100 nm). (B) NTA of exosomes from A549 and H520 cells. (C) Western blot analysis of exosome markers (CD9 and TSG101) and the endoplasmic reticulum marker Calnexin in exosome lysates and parental A549/H520 cell lysates. (D-E) THP-1-M0 macrophages (differentiated from THP-1 cells with 100 ng/mL PMA for 24 h) were co-incubated with DiI-labeled exosomes isolated from A549 and H520 cells. (D) Fluorescence microscopy images of THP-1-M0 macrophages after co-incubation with PKH67-labeled exosomes (scale bar: 20 μm). (E-F) Western blot and quantification of EHF protein levels in THP-1-M0 macrophages after incubation with exosomes from A549 or H520 cells. Data are presented as mean ± SD. P < 0.05 denotes statistical significance.

Article Snippet: Human monocyte cell line (THP-1) (Catalog #: YC-D011) were purchased from Guangzhou Ubigene Biosciences Co., Ltd. (Guangzhou, China) and cultured in RPMI-1640 (Gibco) containing 10% FBS (Gibco).

Techniques: Derivative Assay, Isolation, Western Blot, Marker, Incubation, Labeling, Fluorescence, Microscopy

Journal: Regenerative Therapy

Article Title: Lung cancer cell-derived exosomal EHF drives M2 macrophage polarization via transcriptional activation of RNF41 to promote tumor progression

doi: 10.1016/j.reth.2026.101104

Figure Lengend Snippet: Exosomal EHF reprograms THP-1-M0 macrophages to promote lung cancer cell malignancy and angiogenesis via paracrine signaling. (A) Schematic of the paracrine co-culture system: Exosomes from control (Ctrl) or EHF-knockdown (KD-EHF) A549/H520 cells were co-incubated with THP-1-M0 macrophages. The medium from these macrophages was used to treat A549/H520 cells or HUVECs. (B-E) THP-1-M0 macrophages were treated with three conditions: blank control (no exosome), exosomes from control-transfected A549/H520 cells (Exo Ctrl ), or exosomes from EHF-knockdown A549/H520 cells (Exo KD−EHF ). (B–C) Flow cytometry analysis of CD206 + M2 macrophage proportions in THP-1-M0 cells. (D-E) ELISA measurement of M2-associated cytokines (TGF-β1, IL-10, and VEGFA). (F-M) The medium from exosome treated macrophages was then used to incubate A549/H520 cells or HUVECs. (F-G) EdU staining and quantification of EdU + proliferating A549 and H520 cells. (H–I) Flow cytometric analysis of apoptosis in A549 and H520 cells. (J-K) Transwell migration assays and quantification of migrated A549 and H520 cells. (L-M) Tube formation assays and quantification of tube numbers in HUVECs. Data are presented as mean ± SD. P < 0.05 denotes statistical significance.

Article Snippet: Human monocyte cell line (THP-1) (Catalog #: YC-D011) were purchased from Guangzhou Ubigene Biosciences Co., Ltd. (Guangzhou, China) and cultured in RPMI-1640 (Gibco) containing 10% FBS (Gibco).

Techniques: Co-Culture Assay, Control, Knockdown, Incubation, Transfection, Flow Cytometry, Enzyme-linked Immunosorbent Assay, Staining, Migration

Journal: Regenerative Therapy

Article Title: Lung cancer cell-derived exosomal EHF drives M2 macrophage polarization via transcriptional activation of RNF41 to promote tumor progression

doi: 10.1016/j.reth.2026.101104

Figure Lengend Snippet: EHF transcriptionally activates RNF41 and mediates its intercellular transfer via exosomes. (A) JASPAR database prediction of the EHF-binding motif within the RNF41 promoter region, localized to positions −828/-821. (B) ChIP-qPCR analysis in THP-1-M0 macrophages. (C) Dual-luciferase reporter assays in 293T cells. (D) WB analysis of EHF protein levels in THP-1-M0 macrophages with EHF knockdown (KD-EHF) or control (Ctrl). (E-F) Western blot and qRT-PCR analysis of RNF41 protein and mRNA levels in THP-1-M0 macrophages with KD-EHF or Ctrl. (G-H) THP-1-M0 macrophages were treated with culture medium (Blank), control exosomes (Ctrl Exo, from A549/H520 cells), or EHF-knockdown exosomes (KD-EHF Exo, from A549/H520-KD-EHF cells). RNF41 protein levels were detected by Western blot. Data are presented as mean ± SD. P < 0.05 denotes statistical significance.

Article Snippet: Human monocyte cell line (THP-1) (Catalog #: YC-D011) were purchased from Guangzhou Ubigene Biosciences Co., Ltd. (Guangzhou, China) and cultured in RPMI-1640 (Gibco) containing 10% FBS (Gibco).

Techniques: Binding Assay, ChIP-qPCR, Luciferase, Knockdown, Control, Western Blot, Quantitative RT-PCR

Journal: Regenerative Therapy

Article Title: Lung cancer cell-derived exosomal EHF drives M2 macrophage polarization via transcriptional activation of RNF41 to promote tumor progression

doi: 10.1016/j.reth.2026.101104

Figure Lengend Snippet: RNF41 mediates exosomal EHF-driven pro-tumorigenic effects in lung cancer. (A) Schematic of the rescue co-culture system: THP-1-M0 macrophages (control or RNF41-overexpressing) were incubated with exosomes from control (Exo Ctrl ) or EHF-knockdown (Exo KD−EHF ) A549/H520 cells. The medium from these co-cultures was used to treat A549/H520 cells or HUVECs. (B–C) Flow cytometry was used to analyze the proportion of CD206 + M2-polarized macrophages in THP-1-M0 cells. (D-E) ELISA was employed to quantify the levels of M2-associated cytokines (TGF-β1, IL-10, and VEGFA) in the CM from macrophages. (F-G) EdU assays were carried out to measure the proliferation of A549 and H520 cells. (H–I) Annexin V/PI flow cytometry was used to assess the apoptosis of A549 and H520 cells treated with CM. (J-K) Transwell assays were performed to evaluate the migration of A549 and H520 cells. (L-M) Tube formation assays were conducted on HUVECs treated with CM. Data are presented as mean ± SD. P < 0.05 denotes statistical significance.

Article Snippet: Human monocyte cell line (THP-1) (Catalog #: YC-D011) were purchased from Guangzhou Ubigene Biosciences Co., Ltd. (Guangzhou, China) and cultured in RPMI-1640 (Gibco) containing 10% FBS (Gibco).

Techniques: Co-Culture Assay, Control, Incubation, Knockdown, Flow Cytometry, Enzyme-linked Immunosorbent Assay, Migration

Journal: iScience

Article Title: Serglycin modulates inflammation and metabolism in macrophages

doi: 10.1016/j.isci.2026.115235

Figure Lengend Snippet: SRGN deficiency disrupts macrophage inflammatory activation and alters mitochondrial function (A) Experimental design. Wild-type ( SRGN +/+ ) and knockout ( SRGN −/− ) THP-1 cells were differentiated into macrophages (M0) and polarized to M1 with LPS and IFN-γ for 24 h, followed by RNA-seq and proteomic analysis of culture supernatants ( n = 4). (B) Relative SRGN expression in wild-type THP-1 cells, showing significant induction after M1 polarization (mean ± SEM; unpaired Student’s t test; ∗∗ p < 0.0001). (C) Gene set enrichment analysis (GSEA) of the macrophage activation signature comparing SRGN −/− and SRGN +/+ THP-1 cells. Knockout cells displayed a reduced extent of activation compared to wild-type cells. (D) Differential expression analysis (volcano plot) of SRGN −/− versus SRGN +/+ THP-1 M1 cells. A total of 2,554 genes were significantly altered (adjusted p < 0.05, fold-change threshold of 1.2), with 1,112 upregulated and 1,442 downregulated in knockout cells. (E and F) Hallmark pathway enrichment analysis of significantly differentially expressed genes. Upregulated pathways in SRGN −/− THP-1 cells included inflammatory response, interferon-γ response, interferon-α response, IL2/STAT5 signaling, and epithelial-mesenchymal transition (E). Downregulated pathways included mTORC1 signaling, glycolysis, cholesterol homeostasis, bile acid metabolism, and reactive oxygen species (ROS) pathways (F). Significant pathways are marked with an asterisk (∗). (G) Overlap of differentially expressed genes between SRGN −/− THP-1 cells and Srgn −/− murine macrophages. A total of 115 commonly upregulated and 189 commonly downregulated genes were identified. (H–I) Pathway enrichment analysis of commonly altered genes. Upregulated genes were enriched for inflammatory response and interferon pathways (H), whereas downregulated genes were enriched for TNF-α/NF-κB signaling and glycolysis (I). (J) Overlap of TNF-α signaling genes between human and mouse macrophages, revealing 15 commonly upregulated and 9 commonly downregulated genes. Notably, commonly downregulated genes included ZFP36 , KLF2 , HES1 , and BHLHE40 , regulators of cytokine production and inflammatory programs.

Article Snippet: THP-1 human monocytic cell line , ATCC , RRID: CVCL_0006.

Techniques: Activation Assay, Knock-Out, RNA Sequencing, Expressing, Quantitative Proteomics

Journal: iScience

Article Title: Serglycin modulates inflammation and metabolism in macrophages

doi: 10.1016/j.isci.2026.115235

Figure Lengend Snippet: SRGN deficiency reshapes the inflammatory secretome and transcriptional programs in human macrophages (A) Volcano plot of differentially secreted proteins between SRGN −/− and wild-type THP-1 macrophages under M1 polarization. Among 1,507 quantified proteins, 53 were significantly altered (adjusted p < 0.05), with serglycin being the most downregulated protein in knockout cells. (B) Validation of selected targets by RT-qPCR. SRGN −/− M1 macrophages showed significantly increased expression of IL6 and TNF and reduced expression of CCL5 compared with wild-type cells (mean ± SEM; unpaired Student’s t test; p < 0.05, ∗ p < 0.01, and ∗∗∗ p < 0.0001; n = 4). (C) ELISA quantification of secreted cytokines in culture supernatants. SRGN −/− macrophages secreted significantly less TNF-α, CCL5, and IL-6 compared with wild-type macrophages ( n = 4), consistent with proteomics and RNA-seq data. (D) Transmission electron microscopy (TEM) images of THP-1 M0 and M1 macrophages. Scale bars, 5 μm. Vesicles were manually annotated and quantified in 10 cells per experimental group. The number of vesicles per cell and the percentage of cellular area occupied by vesicles were significantly reduced in both M0 and M1 SRGN −/− macrophages compared with wild-type macrophages. (E) Phagocytosis assay using fluorescently labeled bioparticles. SRGN −/− macrophages exhibited reduced phagocytic capacity under both M0 and M1 conditions (mean ± SEM; unpaired Student’s t test; p < 0.05 and ∗∗ p < 0.001; n = 6).

Article Snippet: THP-1 human monocytic cell line , ATCC , RRID: CVCL_0006.

Techniques: Knock-Out, Biomarker Discovery, Quantitative RT-PCR, Expressing, Enzyme-linked Immunosorbent Assay, RNA Sequencing, Transmission Assay, Electron Microscopy, Phagocytosis Assay, Labeling

Journal: iScience

Article Title: Serglycin modulates inflammation and metabolism in macrophages

doi: 10.1016/j.isci.2026.115235

Figure Lengend Snippet: SRGN knockout alters the metabolic profile of macrophages (A and B) Oxygen consumption rate (OCR; maximal respiration) in wild-type (WT) and SRGN −/− (KO) THP-1 macrophages under M0 (A) and M1 (B) conditions, with or without oleic acid (OA) supplementation. Oleic acid significantly increased mitochondrial respiration in SRGN −/− macrophages (mean ± SEM; unpaired Student’s t test; ∗∗ p < 0.001 and ∗∗∗ p < 0.0001; n = 3). (C and D) Extracellular acidification rate (ECAR) in WT (C) and SRGN −/− (D) macrophages under M0 and M1 conditions, with or without oleic acid. Oleic acid did not reverse glycolytic reprogramming in M1 macrophages; however, ECAR was altered in SRGN −/− cells (mean ± SEM; p < 0.05; n = 3). (E and F) Reactive oxygen species (ROS) levels measured by DCFDA fluorescence. ROS levels were significantly reduced in SRGN −/− macrophages compared with WT under both M0 (E) and M1 (F) polarization states (mean ± SEM; ∗ p < 0.01 and ∗∗ p < 0.001; n = 6).

Article Snippet: THP-1 human monocytic cell line , ATCC , RRID: CVCL_0006.

Techniques: Knock-Out, Fluorescence