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ImmunoCult?-SF Macrophage Medium

Serum-free medium for differentiation of human monocytes to macrophages

ImmunoCult?-SF Macrophage Medium

Serum-free medium for differentiation of human monocytes to macrophages

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Serum-free medium for differentiation of human monocytes to macrophages
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Product Advantages


  • Serum-free medium without the need to supplement with serum

  • Supports robust macrophage differentiation

  • High yields of macrophages with the desired phenotype and function

  • Collect M1 or M2 macrophages in as little as 6 days

Overview

ImmunoCult?-SF Macrophage Medium has been developed for the in vitro culture and differentiation of human monocytes into macrophages when the appropriate cytokines and stimuli are added. The factors for differentiation and activation of macrophages have not been added to ImmunoCult?-SF Macrophage Medium. This provides users the flexibility to prepare a medium that meets their requirements. The medium is a specialized serum-free culture medium that can be used to differentiate human monocytes into M1 (classically activated) and M2a (alternatively activated) macrophages in a 6- or 8-day culture period.
Contains
? Iscove’s MDM
? Pre-tested bovine serum albumin
? Recombinant human insulin
? Human transferrin (iron-saturated)
? 2-Mercaptoethanol
? Supplements
Subtype
Specialized Media
Cell Type
Macrophages, Monocytes
Species
Human
Application
Cell Culture, Differentiation
Brand
ImmunoCult
Area of Interest
Immunology, Infectious Diseases
Formulation Category
Serum-Free

Data Figures

Figure 1. Protocol for the Generation of M1 or M2a Activated Macrophages

Generate monocyte-derived macrophages (MDM) from isolated monocytes by culturing the cells in ImmunoCult?-SF Macrophage Differentiation Medium (ImmunoCult?-SF Macrophage Medium Catalog #10961 with added Human Recombinant M-CSF Catalog #78057). With our 8-day protocol, top-up with fresh ImmunoCult?-SF Macrophage Differentiation Medium on Day-4 and drive specific macrophage activation using appropriate stimuli on Day-6 (IFN-γ+LPS (Catalog #100-1270) for M1 activation and IL-4 for M2a activation). At Day-8 harvest fully mature M1 or M2a macrophages for use in downstream applications. With our 6-day protocol, macrophage activation can be done at the same time as the medium top-up step on Day-4 and harvested on Day-6.

Figure 2. ImmunoCult?-SF Supports Greater M1 and M2a Macrophage Yields Than Competitor’s Serum-Free Medium

Monocytes were cultured in ImmunoCult?-SF Macrophage Medium or a competitor’s serum-free macrophage medium and differentiated into macrophages using an 8-day protocol as shown in Figure 1. At Day-8, macrophages were harvested, counted and analysed by flow cytometry to assess the expression of macrophage markers CD80, CCR7, CD206 and CD209. (A) M1 macrophages were CD80+CCR7+ whereas (B) M2a macrophages showed a CD206+CD209+ phenotype. Macrophage yields are expressed as a percentage of total viable cells at Day 8 relative to the count of initial monocytes at Day 0. Macrophage yields were significantly higher in ImmunoCult?-SF than in Competitor’s serum-free medium (P < 0.05, paired t-test; mean ± SEM; n=18-19).

Figure 3. Activated Macrophages Generated with ImmunoCult?-SF Secrete the Appropriate Cytokines

Macrophages were generated with ImmunoCult?SF Macrophage Medium and activated using IFN-γ+LPS (Catalog #100-1270 ; M1) or IL-4 (M2a) in an 8-day protocol. At Day-8, supernatants from M1 and M2a macrophage cultures were collected and the concentrations of TNF-α, IL-12 (p70) and IL-10 were determined by ELISA. (A) M1 macrophages secreted 2821 ± 396 pg/ml TNF-α (n=24) and 656 ± 86 pg/mL IL-12 (p70) (n=25). (B) M2a macrophages produced 29 ± 6 pg/mL IL 10 (n=21) and did not produce TNF-α (below limit of detection, n=20). Data represents the mean ± SEM.

Protocols and Documentation

Find supporting information and directions for use in the Product Information Sheet or explore additional protocols below.

Document Type
Product Name
Catalog #
Lot #
Language
Document Type
Product Name
Catalog #
10961
Lot #
All
Language
English
Document Type
Product Name
Catalog #
10961
Lot #
All
Language
English

Applications

This product is designed for use in the following research area(s) as part of the highlighted workflow stage(s). Explore these workflows to learn more about the other products we offer to support each research area.

Resources and Publications

Publications (6)

Lipoprotein(a)/CD36 Interaction Drives IL-6/RhoA-GTP Signaling and miRNA Epigenetic Regulation in Coronary Artery Spasm Lin et al. Pharmaceuticals 2025 Sep

Abstract

Background: Lipoprotein(a) [Lp(a)]-induced inflammation contributes to coronary artery spasm (CAS) by the contraction of vascular smooth muscle cells. However, the interaction between Lp(a) and soluble CD36 (sCD36)/interleukin (IL)-6/RAS Homolog Family Member A (RhoA)-GTP signaling pathway has not been evaluated. Methods: We investigated the relevance of Lp(a)/CD36 signaling in CAS patient monocyte-derived macrophages (PMDMs) and a human coronary artery smooth muscle cell (HCASMC) line using expression profile correlation analyses, molecular docking, RNA sequencing, flow cytometry, immunoblotting, and quantitative reverse transcription polymerase chain reaction. Results: Plasma Lp(a) and sCD36 levels in 41 CAS patients were significantly higher ( p = 0.001) and positively correlated (r 2 = 0.3145, p < 0.001), a trend not observed in 36 non-CAS controls. RNA sequencing indicated a significant co-overexpression of CD36 and RhoA in Lp(a)-treated CAS PMDMs and HCASMCs, of which the mRNA and protein expression of CD36 and RhoA were significantly enhanced ( p < 0.001) dose-dependently. Lp(a) rather than LDL preferentially induced CD80+ PMDM (M1) polarization. In HCASMCs, the CD36 knockdown using either short hairpin RNA or natural biflavonoid amentoflavone suppressed Lp(a)-upregulated protein expression of CD36, RhoA-GTP, IL-6, tumor necrosis factor (TNF)-α, nuclear factor (NF)-κB, and CD80; however, overexpressed CD36 increased their levels. Lp(a) decreased and amentoflavone increased the epigenetic expression of CD36 inhibitors, miR-335-5p, and miR-448, respectively. Reciprocally, an miRNA inhibitor or mimic could magnify or diminish Lp(a)-induced CD36, TNF-α, NF-κB and IL-6 expressions in HCASMCs, respectively. Conclusions: Elevated Lp(a) levels upregulate the CD36-dependent TNF-α/NF-κB/IL-6/RhoA-GTP signaling pathway in CAS PMDMs and HCASMCs, indicating that Lp(a)/CD36 inflammatory signaling, HCASMC activation, and macrophage M1 polarization mediate CAS development.
Targeting CD37 promotes macrophage-dependent phagocytosis of multiple cancer cell types and facilitates tumor clearance in mice Nature Communications 2025 Jul

Abstract

Macrophages play vital roles in innate and adaptive immunity, and their functions are mediated via phagocytosis and antigen presentation. Despite the effort to identify phagocytic checkpoints and explore their mechanism of action, current checkpoint-scanning strategies cannot provide a complete and systematic list of such immune checkpoints. Here, we perform in vitro phagocytosis assays using primary healthy donor macrophages co-cultured with breast cancer cells followed by ribosome profiling of sorted macrophages, to identify immune system-specific checkpoints. We observe a downregulation of CD37 in phagocytic macrophages and demonstrate that targeting CD37 with a specific antibody promotes the phagocytosis of multiple cancer cells in vitro. Mechanistically, tumorous macrophage migration inhibitory factor (MIF) directly binds to CD37, promoting the phosphorylation of CD37Y13 and activating a transduction cascade that involves the recruitment of SHP1 and inhibition of AKT signaling, ultimately impairing phagocytosis. In vivo, targeting CD37 promotes tumor clearance in multiple preclinical mouse models and synergizes with anti-CD47 therapy. Thus, our study identifies a previously unidentified phagocytic checkpoint and provides new potential for precise therapy. Cancer cells evade the immune system by disrupting phagocytic clearance. Here, the authors identify CD37 as a potential checkpoint molecule expressed on non-phagocytes and propose that binding to tumor-derived MIF reduces the phagocytic ability via inhibiting the AKT pathway. In preclinical mouse models, anti-CD37-based therapy enhances phagocytosis by macrophages, facilitating tumor clearance.
Interaction of chikungunya virus glycoproteins with macrophage factors controls virion production Z. Yao et al. The EMBO Journal 2024 Sep

Abstract

Despite their role as innate sentinels, macrophages can serve as cellular reservoirs of chikungunya virus (CHIKV), a highly-pathogenic arthropod-borne alphavirus that has caused large outbreaks among human populations. Here, with the use of viral chimeras and evolutionary selection analysis, we define CHIKV glycoproteins E1 and E2 as critical for virion production in THP-1 derived human macrophages. Through proteomic analysis and functional validation, we further identify signal peptidase complex subunit 3 (SPCS3) and eukaryotic translation initiation factor 3?subunit K (eIF3k) as E1-binding host proteins with anti-CHIKV activities. We find that E1 residue V220, which has undergone positive selection, is indispensable for CHIKV production in macrophages, as its mutation attenuates E1 interaction with the host restriction factors SPCS3 and eIF3k. Finally, we show that the antiviral activity of eIF3k is translation-independent, and that CHIKV infection promotes eIF3k translocation from the nucleus to the cytoplasm, where it associates with SPCS3. These functions of CHIKV glycoproteins late in the viral life cycle provide a new example of an intracellular evolutionary arms race with host restriction factors, as well as potential targets for therapeutic intervention.