IL-34 caught my attention years ago when I first saw how cleanly it drove macrophage populations in culture. Most cytokines require cocktails and careful timing, but IL-34 binding to CSF-1R produced consistent, reproducible differentiation that made downstream experiments far more tractable. That reliability matters when you’re trying to isolate variables in immune regulation studies. Recombinant Human IL-34 His Tag has become a staple in labs working on myeloid biology, inflammation models, and increasingly, neurodegeneration research where microglial behavior is central to disease progression.
How IL-34 Functions as a CSF-1R Ligand
Recombinant Human IL-34 operates as a primary ligand for the colony-stimulating factor 1 receptor, placing it at the center of myeloid cell biology. When IL-34 binds CSF-1R, it triggers signaling cascades that govern whether monocyte precursors survive, proliferate, or commit to specific lineages. The receptor itself sits on monocytes, macrophages, osteoclasts, and microglia, which explains why IL-34 influences such diverse biological processes.
Macrophage differentiation represents the most studied outcome of IL-34 signaling. Precursor cells exposed to IL-34 mature into functional macrophages with distinct phenotypes depending on tissue context and co-signals present. These macrophages handle everything from pathogen clearance to debris removal during tissue repair. The cytokine also drives osteoclast formation, the specialized cells responsible for bone resorption during normal remodeling. When IL-34 pathways malfunction, bone disorders often follow because the balance between bone formation and resorption breaks down.
Beyond these established roles, IL-34 participates in broader immune system regulation by influencing antigen presentation and cytokine networks. Its behavior in inflammation pathways proves context-dependent. In some settings, IL-34 amplifies inflammatory responses; in others, it dampens them. This duality makes it both fascinating and challenging to study. Recent work in neuroinflammation research has revealed IL-34’s importance for microglial homeostasis in the central nervous system, opening questions about its involvement in Alzheimer’s disease and other neurodegenerative conditions.
!Recombinant Human IL-4
## Manufacturing Recombinant Human IL-34 His Tag at Scale
Producing high-purity Recombinant Human IL-34 His Tag requires careful attention to expression system selection. At East Mab Bio, we use mammalian expression systems, primarily HEK293 cells, for complex human cytokines like IL-34. Bacterial systems cannot replicate the post-translational modifications that human proteins require for proper folding and biological activity. HEK293 cells glycosylate and process IL-34 in ways that closely match the native human form.
The His-tag enables efficient downstream purification through affinity chromatography. Nickel-NTA resins bind selectively to the polyhistidine sequence, allowing rapid isolation from cell culture supernatant. We follow this initial capture with ion-exchange chromatography and gel filtration to remove remaining contaminants and achieve final purity exceeding 95%. When expression conditions produce misfolded protein, we implement protein refolding protocols to restore native conformation before proceeding.
Endotoxin removal receives particular attention because even trace contamination can confound cell-based experiments or render material unsuitable for in vivo work. Our purification workflow incorporates specific steps to reduce endotoxin levels below 1.0 EU/µg, verified by LAL assay. This East Mab Bio protein manufacturing approach supports large-scale production while maintaining the consistency researchers depend on.
!Recombinant Human FGF-9
### Why His-Tagging Works Well for IL-34
The polyhistidine tag offers practical advantages that explain its widespread adoption. Six to ten histidine residues coordinate with immobilized nickel ions, creating a selective interaction that separates tagged protein from host cell contaminants in a single step. This His-tag purification approach delivers high yields with minimal processing time.
For IL-34 specifically, the tag does not appear to interfere with CSF-1R binding or downstream signaling based on bioactivity assays. The tag sits at the terminus of the protein, away from the receptor interaction surface. Researchers who need tag-free material can cleave it using specific proteases, though most applications tolerate the tag without issue. This flexibility in nickel affinity chromatography protocols makes His-tagging a practical choice for recombinant protein integrity across diverse experimental contexts.
!Recombinant Human GM-CSF
## Research Applications for Recombinant Human IL-34
High-quality Recombinant Human IL-34 His Tag supports experimental work across multiple research areas. In IL-34 immunology research, investigators use it to dissect how this IL-34 cytokine shapes immune cell populations and their functional outputs. Macrophage differentiation assays represent a core application, where researchers expose monocytes to defined IL-34 concentrations and track their maturation, polarization state, and cytokine secretion profiles.
Bone biology researchers rely on IL-34 for osteoclastogenesis studies. By controlling IL-34 exposure, they can examine how osteoclast precursors commit to the bone-resorbing lineage and identify factors that modulate this process. These experiments inform therapeutic strategies for osteoporosis and other conditions where bone resorption exceeds formation.
Neurodegenerative disease research increasingly incorporates IL-34 because microglia, the resident macrophages of the brain, depend on CSF-1R signaling for survival and function. Understanding how IL-34 influences microglial activation states may reveal intervention points for Alzheimer’s disease, Parkinson’s disease, and related conditions. Cancer immunology represents another active area, with tumor-associated macrophages emerging as key players in immune evasion. IL-34 shapes TAM biology, making it relevant for immunotherapy development.
The cytokine also finds use in stem cell differentiation protocols where researchers guide precursor cells toward myeloid lineages. As a cell culture media supplement, IL-34 supports primary macrophage cultures and specialized cell lines. Its defined bioactivity makes it suitable as an IVD diagnostic protein component in assays measuring immune function or inflammatory markers.
!Recombinant Human IL-7
### Therapeutic Potential in Immunotherapy and Regenerative Medicine
IL-34’s ability to modulate immune cell behavior positions it for IL-34 immunotherapy applications. Researchers are exploring whether manipulating IL-34 signaling can enhance anti-tumor immunity by reprogramming tumor-associated macrophages toward inflammatory phenotypes that support rather than suppress immune attack.
In cell therapy research, IL-34 helps optimize expansion protocols for therapeutic cell populations. Macrophages generated with IL-34 may have distinct functional properties compared to those produced with CSF-1 alone. Regenerative medicine applications include organoid development and tissue engineering, where IL-34 supports the myeloid components necessary for complex tissue models. These applications remain largely preclinical, but the underlying biology suggests real therapeutic potential.
Quality Control for Reliable Recombinant IL-34
Reproducible research requires reagents that perform consistently. East Mab Bio implements recombinant protein quality control at every production stage to ensure Recombinant Human IL-34 His Tag meets researcher expectations.
Bioactivity validation confirms that each lot induces proliferation in CSF-1R-positive cells at expected potencies. This functional assay matters more than purity alone because a protein can be pure yet inactive if folding or modification went wrong during production. Endotoxin testing by LAL assay verifies levels remain below 1.0 EU/µg, critical for cell culture and in vivo applications where endotoxin contamination would confound results.
Purity analysis methods include SDS-PAGE analysis showing greater than 95% purity and Western blot verification confirming identity with anti-IL-34 antibodies. ELISA assay quantifies protein concentration accurately, enabling researchers to dose experiments correctly. We track lot-to-lot consistency by comparing these parameters across production runs, flagging any deviations for investigation.
Protein stability testing evaluates how well lyophilized material maintains activity under recommended storage conditions. This information helps researchers plan experiments and manage inventory. Our commitment to GMP compliant production principles ensures these quality measures are systematic rather than ad hoc, providing reliable GFs:growth factors for demanding applications.
Specifications for Recombinant Human IL-34 His Tag
| Feature | Specification |
|---|---|
| Product Name | Recombinant Human IL-34 (His Tag) |
| Expression System | HEK293 cells (Mammalian) |
| Purity | >95% by SDS-PAGE |
| Endotoxin Level | <1.0 EU/µg (LAL assay) |
| Bioactivity | Induces proliferation of CSF-1R positive cells |
| Formulation | Lyophilized from PBS, pH 7.4 |
!Recombinant Human HGF
### How East Mab Bio Maintains IL-34 Quality Standards
East Mab Bio quality standards begin with high-quality raw materials and extend through every production step. Our biotechnology quality assurance system documents procedures, tracks deviations, and implements corrective actions when needed. This recombinant protein reliability comes from treating quality as a process rather than an endpoint inspection. Researchers working with our Recombinant Human IL-34 His Tag can expect consistent performance that supports reproducible experimental outcomes.
Frequently Asked Questions About Recombinant Human IL-34
What biological processes does Recombinant Human IL-34 regulate?
Recombinant Human IL-34 binds CSF-1R to drive monocyte and macrophage differentiation, survival, and proliferation. It also promotes osteoclast formation for bone remodeling. The cytokine participates in immune regulation and inflammatory responses, with emerging roles in microglial function relevant to neuroinflammation research. These diverse activities make it useful for studying immune development, bone metabolism, and central nervous system biology.
Does the His-tag affect IL-34 bioactivity or experimental results?
The His-tag does not appear to interfere with IL-34 function based on bioactivity assays comparing tagged and untagged forms. The tag localizes to the protein terminus, away from the CSF-1R binding interface. For applications requiring tag-free protein, enzymatic cleavage can remove it. Most researchers use the tagged form directly without observing differences in experimental outcomes.
What quality testing does East Mab Bio perform on Recombinant Human IL-34?
Each lot undergoes SDS-PAGE for purity assessment, Western blot for identity confirmation, and ELISA for concentration determination. Bioactivity assays verify functional response in CSF-1R-positive cells. LAL testing confirms endotoxin levels below 1.0 EU/µg. We compare these results across lots to maintain consistency and conduct stability testing to establish shelf life under recommended storage conditions.
Partner with East Mab Bio for Your IL-34 Research Needs
East Mab Bio provides premium Recombinant Human IL-34 His Tag for IVD development, cell culture, and cell therapy research. Our technical team can discuss your specific application requirements and recommend appropriate product formats. Contact us at +86-400-998-0106 or product@eastmab.com to request specifications, discuss bulk quantities, or schedule a consultation about your research needs.
