CD207 Antibody

What is CD207 and which cell types express this marker?

CD207, also known as Langerin (full name: CD207 molecule, langerin), is a type II transmembrane C-type lectin receptor primarily expressed on Langerhans cells (LCs) in the skin epidermis. It has a calculated molecular weight of approximately 37 kDa but is typically observed at around 40 kDa in experimental conditions . CD207 is abundantly expressed by epidermal LCs and freshly isolated LCs, but becomes downregulated upon stimulation via CD40 and during in vitro culture . In mice, CD207 is also expressed on a subset of CD8+ dendritic cells (DCs), which also express DEC205/CD205 . CD207 serves as an important marker for tracking LC migration and distinguishing them from other DC populations in secondary lymphoid organs .

What are the primary applications for CD207 antibodies in research?

CD207 antibodies are employed in multiple applications including:

• Western Blot (WB): For detecting CD207 protein in tissue lysates, typically at dilutions of 1:500-1:1000 .

• Immunohistochemistry (IHC): For visualizing CD207+ cells in tissue sections, using dilutions of 1:3000-1:8000 .

• Flow Cytometry: For identifying and quantifying CD207+ cell populations in cell suspensions .

• Immunofluorescence: For localizing CD207+ cells in tissues using confocal microscopy .

These applications enable researchers to study the distribution, migration, and functional characteristics of Langerhans cells and other CD207-expressing cells in various physiological and pathological contexts.

How does CD207 antibody staining differ between fresh and cultured Langerhans cells?

For optimal detection in different conditions:

• Fresh LCs: Standard staining protocols yield strong signal

• Cultured/stimulated LCs: May require more sensitive detection methods or higher antibody concentrations

• Fixed samples: Permeabilization is essential as CD207 is primarily intracellular in location

This dynamic expression pattern makes CD207 a useful marker for tracking LC maturation states, but researchers should account for these changes when designing experiments involving cultured cells.

How do CD207+ Langerhans cells compare with other antigen-presenting cell populations in migration dynamics?

CD207+ Langerhans cells represent only a minor component of the antigen-presenting cell (APC) population that migrates from the epidermis following stimulation or vaccination. Research has shown that compared to other dermal-derived APCs that are CD207-MHCII+ or CD207-CD11c+, the relative numbers of CD207+ cells in dermal exudate populations and in skin-draining lymph nodes are surprisingly small .

In experimental vaccination models, researchers observed that:

Interestingly, when comparing "protective" radiation-attenuated and "non-protective" normal stimuli, the migration patterns of CD207+ cells were similar in both numbers and kinetics . This suggests that while CD207+ LCs do respond to antigenic stimuli, they may not be the critical APC population driving certain immune responses, challenging earlier assumptions about LC primacy in skin immunity.

What are the spatial distribution differences of CD207+ cells across different tissues and species?

The spatial distribution of CD207+ cells shows notable tissue-specific and species-specific patterns that are important for understanding their functional roles:

In Human Tissues:

• Skin Epidermis: CD207+ Langerhans cells show specific cytoplasmic labeling and are distributed throughout the epidermis

• Lymph Nodes: CD207+ cells are found in T cell zones and can be distinguished from other DC populations

In Mouse Tissues:

• Spleen: Surprisingly, most CD207+ DCs are located in marginal zones surrounding splenic white pulp nodules, with smaller numbers in T cell areas

• Marginal Zone: Despite their location alongside various macrophage populations, CD207+ DCs lack identifying molecules for three different types of macrophages found in these regions

• Strain Differences: CD207 expression on CD8+ DCs is strong in BALB/c and BALB/c × C57BL/6 F1 mice, but notably weaker in C57BL/6 mice

These distribution patterns challenge previous assumptions that CD8+ DCs (which express CD207) were restricted to T cell zones. The discovery that most CD207+ CD8+ DCs actually reside in marginal zones provides new perspectives on their potential interactions with blood-borne antigens and immune cell populations.

How does intracellular versus surface expression of CD207 impact antibody selection and staining protocols?

CD207/Langerin exhibits a predominantly intracellular localization pattern, with limited surface expression. This distribution pattern significantly impacts antibody selection and staining protocols:

Expression Pattern Impact:

• In C57BL/6 mice, CD207 labeling increases markedly after fixation and permeabilization, confirming its primarily intracellular location

• The DCGM4 antibody clone detects both intracytoplasmic and surface membrane CD207, though surface staining is typically weaker

Protocol Considerations:

• Immunolabeling requires intracellular staining protocols including permeabilization agents (e.g., 0.1% saponin) at each incubation step

• Some antibodies specifically react with cytoplasmic epitopes of CD207, making permeabilization absolutely essential

• The dynamic nature of CD207 expression affects staining outcomes - DCGM4 antibody acts as a ligand for Langerin, triggering rapid endocytosis within 20 minutes at 37°C

For comprehensive detection, researchers should:

• Include appropriate permeabilization steps for intracellular staining

• Consider the dynamic trafficking of CD207 when designing staining protocols

• Use appropriate controls to distinguish specific staining from background

• Select antibody clones validated for the intended application (surface vs. intracellular detection)

What are the optimal protocols for CD207 detection in paraffin-embedded tissue sections?

Detecting CD207 in paraffin-embedded tissue sections requires specific methodological considerations to achieve optimal results:

Recommended Protocol for Immunohistochemistry:

• Antigen Retrieval Options:

  • Primary recommendation: TE buffer pH 9.0

  • Alternative option: Citrate buffer pH 6.0

• Antibody Selection and Dilution:

  • For polyclonal antibodies (e.g., 11841-1-AP): Use at 1:3000-1:8000 dilution

  • For specific applications like human skin: Goat Anti-Human Langerin/CD207 Antigen Affinity-purified Polyclonal Antibody (AF2088) at 15 μg/mL concentration

• Detection System:

  • For goat primary antibodies: Anti-Goat HRP-DAB Cell & Tissue Staining Kit

  • Counterstain with hematoxylin for nuclear visualization

• Incubation Conditions:

  • Overnight incubation at 4°C for optimal binding

When performed correctly, CD207 staining should show specific labeling localized to the cytoplasm of Langerhans cells in the skin epidermis . It is advisable to include positive control tissues (human or mouse skin) and negative controls (isotype-matched antibodies) to validate staining specificity.

What multicolor flow cytometry panels are most effective for identifying CD207+ populations in complex tissues?

Designing effective multicolor flow cytometry panels for CD207+ cell identification requires strategic marker selection to distinguish these cells from other populations in complex tissues:

Recommended 8-Color Panel for Spleen Cell Analysis:

Gating Strategy:

• Exclude debris and doublets using FSC/SSC parameters

• Identify classical DCs (CD11chigh)

• Further separate into CD11bhigh CD8- and CD11blow CD8+ subsets

• Confirm CD207+ cells within the CD8+ DC population

• Distinguish from other populations such as RPMs (F4/80high CD11clow CD11blow) and plasmacytoid DCs (PDCA-1+)

This comprehensive panel enables identification of CD207+ CD8+ DCs and distinguishes them from other cell types that may share partial phenotypic similarities, providing more accurate analysis of these rare populations in tissues.

How should researchers optimize CD207 antibody dilutions for different experimental applications?

Optimizing CD207 antibody dilutions is critical for achieving specific staining with minimal background across different applications. Based on available research data:

Application-Specific Dilution Recommendations:

Optimization Recommendations:

• Titration Series: For each new lot of antibody and experimental system, perform a titration series (typically 2-fold dilutions above and below the recommended range)

• Sample-Dependent Adjustment: As noted in the literature, optimal dilution may be sample-dependent

• Signal-to-Noise Ratio: Select the dilution that provides the highest signal-to-noise ratio rather than strongest absolute signal

• Validation Controls:

  • Positive tissue controls (human/mouse skin)

  • Negative controls (tissues known to lack CD207 expression)

  • Isotype controls to assess nonspecific binding

The optimal antibody concentration balances specific staining intensity with minimal background, and should be determined empirically for each experimental system.

Why might CD207 staining vary between different mouse strains and how can researchers address this variation?

Strain-dependent variation in CD207 staining presents a significant challenge for researchers working with mouse models. Research data reveals:

CD207 antibody labeling effectively identifies the CD8+ DC subset in spleen cell suspensions from BALB/c and BALB/c × C57BL/6 F1 mice, but poorly labels this subset in C57BL/6 mice . This strain-dependent variation appears to be biological rather than technical in nature.

Underlying Mechanisms:

• Differential expression levels of CD207 protein between strains

• Possible genetic polymorphisms affecting antibody epitope recognition

• Regulatory differences in CD207 expression in response to environmental stimuli

Recommended Approaches:

• Strain-Specific Protocol Modifications:

  • For C57BL/6 mice: Use fixation and permeabilization to enhance detection, as labeling increases markedly after these steps

  • For BALB/c mice: Standard protocols typically yield adequate staining

• Alternative Markers:

  • When working with C57BL/6 mice, consider using other markers to identify the CD8+ DC population:

    • CD205/DEC205 (though primarily labels cells in T cell areas)

    • CD8 and CD11c co-staining (though CD8 is also expressed by T cells)

• Experimental Design Considerations:

  • Include strain-matched controls in all experiments

  • Report mouse strain in all publications to contextualize CD207 staining results

  • Consider crossing genetic modifications onto BALB/c background when CD207 staining is critical

By acknowledging these strain differences and adapting protocols accordingly, researchers can obtain more consistent and interpretable results across different mouse genetic backgrounds.

What are the optimal fixation and permeabilization conditions for intracellular CD207 detection?

Since CD207/Langerin is primarily located intracellularly, proper fixation and permeabilization are critical for accurate detection:

Recommended Fixation and Permeabilization Protocol:

• Fixation Options:

  • For flow cytometry: 2-4% paraformaldehyde in PBS for 15-20 minutes at room temperature

  • For tissue sections: Immersion fixation in neutral-buffered formalin prior to paraffin embedding

• Permeabilization Agents:

  • 0.1% saponin in staining buffer (required at each incubation step)

  • Alternative: 0.1% Triton X-100 for stronger permeabilization in difficult samples

• Critical Protocol Points:

  • Maintain permeabilizing agent throughout all antibody incubation steps, not just initially

  • For the DCGM4 antibody clone, consider temperature effects as it can trigger rapid endocytosis within 20 minutes at 37°C

  • For dual surface/intracellular staining protocols, perform surface marker staining prior to fixation/permeabilization

• Buffer Considerations:

  • Include protein (1% BSA or 5% serum) in staining buffers to reduce nonspecific binding

  • Maintain physiological pH (7.2-7.4) to preserve epitope structure

When optimized, intracellular CD207 staining should yield specific signal with minimal background, allowing for accurate identification of Langerhans cells and other CD207+ populations in various experimental systems.

How can CD207 antibodies be utilized to study Langerhans cell migration in inflammatory skin conditions?

CD207 antibodies provide valuable tools for studying Langerhans cell migration dynamics in inflammatory skin conditions:

Methodological Approaches:

• Skin Biopsy Culture System:

  • Collect skin biopsies from normal and inflamed sites

  • Culture in vitro to collect dermal exudate populations

  • Analyze migrated cells by flow cytometry for CD207 expression

  • Compare the kinetics and magnitude of LC migration between conditions

• Draining Lymph Node Analysis:

  • Track CD207+ cell accumulation in skin-draining lymph nodes (sdLN) at various timepoints after inflammatory stimulus

  • Quantify and phenotype CD207+ cells using multicolor flow cytometry

  • Compare with other migrating APC populations (CD207-MHCII+ or CD207-CD11c+)

• Time-Course Experiments:

  • Research shows elevated numbers of CD207+ LCs can be detected in sdLN from 24 hours to 4 days after stimulus

  • Compare migration kinetics between different inflammatory triggers

Research Insights:
Studies have shown that CD207+ LCs constitute only a minor component of the antigen-presenting cell population that migrates from the epidermis after stimulation . This challenges earlier assumptions about LC predominance in skin immune responses and suggests that:

• Other DC populations may play more significant roles in certain inflammatory conditions

• The relative contribution of CD207+ LCs to immune priming may be context-dependent

• The migration of CD207+ cells can be similar between different stimuli regardless of their protective efficacy

By utilizing CD207 antibodies in these experimental approaches, researchers can better understand the complex dynamics of skin immunity in inflammatory conditions and potentially identify new therapeutic targets.

What future directions are emerging in CD207 antibody applications for immunological research?

CD207 antibody applications continue to evolve, with several promising research directions emerging that will expand our understanding of Langerhans cells and other CD207+ populations:

Emerging Research Applications:

• Targeted Antigen Delivery:

  • CD207 antibodies engineered to deliver antigenic proteins have demonstrated efficient in vivo presentation in both peripheral lymph nodes and spleen

  • This approach offers potential for targeted vaccine development and immunotherapy strategies

• Single-Cell Analyses:

  • Integration of CD207 antibody staining with single-cell RNA sequencing to reveal heterogeneity within traditional CD207+ populations

  • Identification of novel CD207+ cell subtypes with distinct functional capabilities

• Intravital Imaging:

  • Development of fluorescently-tagged CD207 antibody fragments for real-time tracking of Langerhans cell migration in living tissues

  • Direct visualization of interactions between CD207+ cells and other immune populations

• Comparative Biology:

  • Exploration of species differences in CD207 expression and function beyond the current mouse and human focus

  • Understanding evolutionary conservation and divergence of CD207's role across species

• Pathological Contexts:

  • Expanded application in various disease states including:

    • Inflammatory skin disorders

    • Cancer immunosurveillance

    • Infectious disease responses

    • Autoimmunity