Background: The IL-17 Cytokine Family and IL17D

Interleukin-17 (IL-17) family cytokines are a group of structurally related proteins that play critical roles in immune regulation, inflammation, and host defense. The family currently comprises six members: IL-17A through IL-17F, with IL-17D being a relatively less-studied member that has attracted increasing research interest due to its distinct expression pattern and biological activities.

IL17D is encoded by the IL17D gene and shares the conserved cystine-knot motif characteristic of the IL-17 family. Unlike IL-17A, which is predominantly produced by Th17 cells, IL17D shows a broader expression profile across multiple tissue types. Understanding the biology of IL17D may provide insights into non-classical cytokine signaling mechanisms in innate and adaptive immunity.

Biochemical Properties of Recombinant Human IL17D Protein

Recombinant Human IL17D Protein is produced using recombinant DNA technology to ensure consistent quality and biological activity suitable for in vitro research applications. The recombinant protein retains the core structural features of the native IL17D cytokine, including the cystine-knot fold that is essential for receptor binding and downstream signaling.

Key biochemical characteristics include its classification as a secreted protein, its ability to form homodimeric structures, and its interaction with specific IL-17 receptor subunits on target cells. Researchers should consult the product datasheet for lot-specific information on purity, molecular weight, endotoxin levels, and reconstitution conditions, as these parameters are critical for experimental reproducibility.

Research Applications

Recombinant Human IL17D Protein is suitable for a range of research applications in immunology and cell biology. Common uses include:

• In vitro cell stimulation assays: IL17D can be used to stimulate target cell lines or primary cells to study downstream signaling cascades, gene expression changes, and cytokine production profiles.
• Receptor binding studies: The recombinant protein can be used in binding assays to characterize IL-17 receptor interactions and to screen potential inhibitors.
• ELISA standard and antibody validation: Purified recombinant IL17D protein is commonly employed as a standard in quantitative immunoassays or as an antigen for antibody specificity testing.
• Functional pathway research: Studies of NF-κB activation, MAPK signaling, and inflammatory mediator induction downstream of IL17D receptor engagement.

Researchers working on innate immunity, tumor immunology, and inflammatory disease models may find Recombinant Human IL17D Protein a valuable addition to their experimental toolkit.

Handling, Storage, and Reconstitution Guidelines

Proper handling and storage are essential to maintain the activity and integrity of Recombinant Human IL17D Protein. General best practices for recombinant cytokine proteins apply:

• Storage: Lyophilized protein should be stored at −20 °C or −80 °C upon receipt. Avoid repeated freeze-thaw cycles, as these can compromise activity.
• Reconstitution: Reconstitute the lyophilized protein in sterile, endotoxin-free water or the buffer recommended in the product datasheet. Allow the vial to equilibrate to room temperature before opening.
• Working aliquots: Prepare single-use aliquots after reconstitution to avoid activity loss from repeated freeze-thaw cycles.
• Carrier protein: Adding a carrier protein such as BSA (0.1%) to the reconstituted solution may improve stability during storage.

Always refer to the specific product datasheet (absea#PQ-470) for lot-specific instructions, as conditions may vary between production lots.