Recombinant Mouse APRIL

Recombinant Mouse APRIL is widely used in research applications because it is a biologically active cytokine that plays a critical role in regulating immune responses, B cell biology, apoptosis, and disease mechanisms such as autoimmunity and cancer.

Key scientific reasons to use recombinant Mouse APRIL include:

• Immune Regulation: APRIL is a member of the TNF superfamily and binds to receptors such as TACI and BCMA, influencing B cell maturation, differentiation, and survival. It also modulates T cell-dependent humoral responses and can inhibit pathological humoral responses in autoimmune disorders.

• B Cell Biology: APRIL enhances the proliferation and survival of plasma cells, making it essential for studies on B cell development, antibody production, and immune homeostasis.

• Apoptosis and Cell Survival: APRIL protects cells from apoptosis and is involved in signaling pathways such as NF-κB, which are crucial for cell survival and immune modulation.

• Disease Modeling: Elevated APRIL levels are associated with autoimmune diseases (e.g., lupus) and certain lymphomas, making recombinant APRIL valuable for modeling disease mechanisms and testing therapeutic interventions.

• Cancer Research: APRIL stimulates proliferation of tumor cell lines and increases tumorigenicity, supporting studies on tumor biology and the tumor microenvironment.

• Experimental Versatility: Recombinant Mouse APRIL is suitable for a range of applications, including:

  • In vitro cell proliferation assays (B and T cells)
  • ELISA standards for quantifying APRIL in biological samples
  • Western blot controls
  • Functional studies of ligand-receptor interactions

• High Purity and Consistency: Recombinant production ensures high purity (>95%), batch-to-batch consistency, and reliable biological activity, which are critical for reproducible experimental results.

• Cross-Species Relevance: Mouse APRIL shares high sequence identity with human and rat APRIL, allowing for translational studies and comparative immunology research.

In summary, using recombinant Mouse APRIL enables precise, reproducible investigation of immune pathways, B cell function, apoptosis, and disease processes, making it a foundational tool for immunology, oncology, and translational research.

Yes, recombinant mouse APRIL is well-suited for use as a standard for quantification and calibration in ELISA assays. This application is one of the primary uses for recombinant APRIL proteins in research.

Formulation Considerations

When selecting recombinant mouse APRIL for ELISA standardization, you should consider the formulation type. The protein is typically available in two formats:

BSA-containing formulation: This version is lyophilized from a filtered solution in Tris and NaCl with bovine serum albumin (BSA) as a carrier protein. This formulation is recommended for use as an ELISA standard because the carrier protein enhances stability, increases shelf-life, and allows storage at more dilute concentrations.

Carrier-free formulation: This alternative lacks BSA and is recommended only when the presence of BSA could interfere with your specific application.

Reconstitution and Preparation

For standard curve preparation, recombinant mouse APRIL should be reconstituted according to manufacturer specifications. Typical reconstitution involves dissolving the lyophilized protein at 100 μg/mL in deionized water. When preparing your standard curve, typical concentration ranges span from 0 to 1000 pg/mL, though this may be adjusted based on your predicted target protein concentration.

Quality Characteristics

Recombinant mouse APRIL used for ELISA standardization typically exhibits high purity and is endotoxin-free, making it suitable for quantitative analysis. The protein demonstrates bioactivity with reported ED₅₀ values of 0.5-3 ng/mL in functional assays.

Storage and Handling

Store the reconstituted protein using a manual defrost freezer and avoid repeated freeze-thaw cycles to maintain stability and accuracy of your standard curve.

Recombinant Mouse APRIL has been validated in published research for several key applications, primarily in the fields of immunology, cell biology, and oncology.

Validated Applications in Published Research:

• In vivo assays: Recombinant mouse APRIL has been administered to mice to study its effects on immune cell activation, lymphocyte development, and disease models, including autoimmune and tumorigenesis studies.
• Bioassays: Used to assess biological activity, such as the proliferation and survival of B cells, T cells, and tumor cells, as well as to evaluate receptor binding (e.g., BCMA, TACI).
• Cell proliferation assays: Demonstrated ability to induce proliferation of activated T cells and B cells in vitro, often measured by dose-dependent responses.
• Functional studies of immune pathways: Used to dissect signaling through TNF superfamily receptors (TACI, BCMA), and to study the regulation of humoral immune responses, plasma cell differentiation, and NF-κB pathway activation.
• Tumorigenesis models: Shown to stimulate proliferation of tumor cell lines and increase tumorigenicity in mouse xenograft models.
• ELISA standard and Western blot control: Utilized as a standard protein in ELISA assays and as a positive control in Western blotting for detection and quantification purposes.

Supporting Details and Context:

• Immunology: APRIL is a cytokine that regulates B-cell maturation, plasma cell survival, and T-cell-dependent humoral responses. It is involved in autoimmune disease models and has been used to study the BAFF/APRIL axis in immune regulation.
• Oncology: Recombinant APRIL has been used to investigate its role in tumor cell proliferation and survival, both in vitro and in vivo, highlighting its potential involvement in cancer progression.
• Receptor binding studies: Validated for use in binding assays with its receptors (TACI, BCMA), often employing biosensor-based methods or cell-based assays to confirm functional activity.
• Disease models: Applied in studies of lupus, lymphomas, and other immune-related disorders to elucidate APRIL's role in disease mechanisms.

Summary Table of Validated Applications

These applications are well-supported by published research and product validation data, confirming the utility of recombinant mouse APRIL in both basic and translational studies of immune regulation and cancer biology.

To reconstitute and prepare Recombinant Mouse APRIL protein for cell culture experiments, dissolve the lyophilized protein in sterile deionized water or buffer to a concentration of 100 μg/mL, optionally including 0.1% BSA as a carrier protein to enhance stability.

Detailed protocol and best practices:

• Reconstitution:

  • Add sterile deionized water directly to the lyophilized protein to achieve a final concentration of 100 μg/mL.
  • Alternatively, use sterile phosphate-buffered saline (PBS) with 0.1% BSA if additional protein stability is required, especially for sensitive cell culture applications or if the protein will be stored after reconstitution.
  • Gently swirl or invert the vial to mix; avoid vigorous vortexing to prevent protein denaturation.

• Aliquoting and Storage:

  • After reconstitution, aliquot the solution to avoid repeated freeze-thaw cycles, which can degrade the protein.
  • Store aliquots at –20 °C or colder in a manual defrost freezer.
  • Avoid multiple freeze-thaw cycles to maintain biological activity.

• Preparation for Cell Culture:

  • Before use, dilute the reconstituted stock to the desired working concentration in cell culture medium immediately prior to addition to cells.
  • If using a carrier-free preparation, ensure the final buffer is compatible with your cell culture system (e.g., PBS or culture medium).
  • For functional assays, typical working concentrations range from 1–100 ng/mL, but optimal dosing should be determined empirically based on your specific assay and cell type.

• Quality Control:

  • Centrifuge the reconstituted solution briefly before use to remove any insoluble material.
  • Always consult the product-specific datasheet or certificate of analysis for any additional instructions or concentration adjustments required for your experimental setup.

Summary Table:

Note: Always verify the specific formulation and instructions for your recombinant APRIL protein, as some preparations may include carrier proteins or require different buffers. If your experiment is sensitive to BSA or other additives, use a carrier-free formulation and reconstitute in sterile water or compatible buffer.