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POSTN

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All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.

Background

Periostin (POSTN) is a secreted matricellular matrix protein encoded by POSTN gene, belonging to fasciclin domain-containing protein family and acting as central coordinator of extracellular matrix assembly and fibroblast activation. POSTN is predominantly secreted by stromal fibroblasts and reactive epithelial cells, carrying evolutionarily conserved integrin-binding fasciclin domains across species, serving as essential modulator for collagen crosslinking, cell-matrix adhesion and profibrotic signal amplification. POSTN-mediated matrix interaction exerts decisive effects on sustaining tissue tensile structure during repair, while driving progressive matrix deposition under sustained stress conditions. Furthermore, POSTN coordinates downstream signaling cascades governing fibroblast proliferation, inflammatory cell adhesion and epithelial phenotypic transition to regulate tissue scar formation. Distinct from other matricellular factors with restricted tissue distribution, POSTN carries unique non-redundant profibrotic functions across multiple organ systems, rendering it indispensable for wound remodeling and pathological fibrotic progression.

POSTN executes biological functions via anchoring to extracellular collagen fibrils and engaging cell-surface integrin receptors, stimulating fibroblast synthetic programs to promote matrix protein production and crosslinking. Its conserved fasciclin domains mediate stable matrix-cell linkage to amplify profibrotic signal transmission, balancing controlled tissue repair against excessive scar accumulation. POSTN participates in wide-ranging biological processes including collagen remodeling, fibroblast activation, inflammatory stromal infiltration and epithelial-mesenchymal shift. Elevated POSTN secretion disturbs matrix turnover equilibrium, triggering irreversible tissue fibrosis and supporting invasive phenotypic transformation in epithelial lesions. Therefore, POSTN constitutes a pivotal research target for matrix biology, organ fibrosis and tumor stromal progression mechanisms.

Fig. 1 POSTN exon17-dependent crosstalk among cancer cells, CAFs and TAMs in tumor microenvironment. (OA Literature)Fig. 1 Reciprocal paracrine loop mediated by POSTN exon17 isoform between cancer cells and CAFs; their secreted IL6/IL8 drive recruitment and polarization of CD163-positive TAMs, which in turn secret inflammatory cytokines to amplify malignant signaling.1

POSTN Protein Function: Core Roles in Matrix Assembly and Profibrotic Signaling

The biological functions of POSTN are focused on fasciclin domain-mediated integrin binding, collagen matrix stabilization and fibrotic phenotype regulation:

  • Extracellular Matrix Stabilization: Crosslinks collagen fibrils to reinforce tissue structural integrity during repair responses.
  • Fibroblast Activation Signaling: Engages cell integrins to stimulate synthetic programs driving matrix protein secretion.
  • Stromal Immune Recruitment: Modulates matrix surface adhesion sites to facilitate inflammatory cell retention within scar tissue.
  • Epithelial Plasticity Tuning: Supports epithelial-mesenchymal transition to shape tissue invasive phenotypes under pathological stress.
  • Disease Relevance: Sustained overexpression drives progressive organ fibrosis and stromal remodeling in proliferative lesions.

POSTN Protein Product

Creative Biolabs offers high-quality POSTN proteins via optimized expression systems, covering full-length POSTN and isolated fasciclin domain variants. These products retain native matrix-binding conformation and intrinsic integrin-interacting activity, suitable for collagen assembly, fibroblast signaling and anti-fibrotic compound screening. All POSTN proteins undergo rigorous quality control to guarantee consistent functional performance and reliable application across diverse research platforms.

POSTN Membrane Protein Product

Not finding the membrane protein product you need? Contact us to start your one-stop custom service!

POSTN Stable Cell Line Product

Creative Biolabs provides custom engineered POSTN stable cell lines, including overexpression and gene silencing models. These cell line models are optimized for matrix remodeling, fibrotic stromal phenotype and compound response profiling. Each cell line undergoes strict validation procedures to ensure steady target expression levels and uniform functional performance across multiple experimental scenarios.

POSTN Stable Cell Line Product

Not finding the stable cell line product you need? Contact us to start your one-stop custom service!

POSTN Recombinant Antibody Product

High-specificity recombinant antibodies targeting POSTN are developed with advanced antibody engineering workflows, without cross-reactivity against other fasciclin-containing matricellular proteins. These antibodies receive multi-scenario functional validation, applicable to protein expression profiling, extracellular matrix deposition detection, integrin-matrix binding assessment and fibrotic research, enabling precise characterization of POSTN expression patterns, tissue matrix distribution and functional modulation under physiological and pathological states.

POSTN Recombinant Antibody Product

Not finding the recombinant antibody product you need? Contact us to start your one-stop custom service!

Product Features

  • Native Matrix Binding Activity: Preserves endogenous fasciclin-mediated integrin and collagen binding capacity and matrix remodeling function, supporting accurate stromal fibrosis and tissue repair research.
  • Matricellular Protein Specificity: Validated for stable biological activity and specific extracellular matrix anchoring, delivering consistent and repeatable research readouts.
  • Fibrotic Tissue Compatibility: Optimized for matrix assembly analysis, fibrotic phenotype detection and anti-fibrotic compound discovery, supplying reliable research tools.
  • Comprehensive Customization Support: Facilitates end-to-end development of customized proteins, antibodies and stable cell lines to address diverse extracellular matrix research requirements.

Custom POSTN Research Services

Beyond catalog products, Creative Biolabs offers specialized custom services for POSTN research:

  • Custom POSTN Protein Production: Tailored expression of POSTN sequence variants, epitope-tagged matrix proteins and fasciclin-truncated constructs for collagen crosslinking and fibroblast signaling research.
  • Custom Antibody Development: Generation of POSTN-specific antibodies for expression detection, extracellular matrix localization profiling, integrin binding evaluation and functional mechanism exploration.
  • Stable Cell Line Engineering: Custom POSTN-modified cell models and organ fibrosis research platforms with standardized functional validation.
  • Functional Assay Development: Design of POSTN-mediated collagen remodeling, fibroblast activation and stromal inflammatory recruitment detection assays.

Frequently Asked Questions (FAQ)

  1. What is the primary function of POSTN?

    POSTN is a secreted matricellular protein that binds collagen and cell integrins to regulate extracellular matrix assembly and drive fibroblast profibrotic activation.

  2. Why is POSTN a significant research target?

    POSTN is a master regulator of pathological matrix deposition; sustained expression drives irreversible organ fibrosis and stromal remodeling in proliferative lesions, establishing it as a vital research target.

  3. Are Creative Biolabs' POSTN products suitable for clinical use?

    No, all POSTN products and services are strictly for research use only, not intended for clinical diagnosis or treatment.

  4. What types of POSTN products does Creative Biolabs offer?

    Offerings include POSTN proteins, high-specificity recombinant antibodies and custom stable cell lines for matrix remodeling and fibrotic disease research.

  5. How are POSTN proteins validated for activity?

    POSTN proteins undergo functional verification via collagen and integrin binding affinity assessment, fasciclin domain conformational stability evaluation.

Reference
  1. Shibata, Kana, et al. "The Importance of Suppressing Pathological Periostin Splicing Variants with Exon 17 in Both Stroma and Cancer." Cells 13.17 (2024): 1410. Under Open Access license CC BY 4.0, without modification. https://doi.org/10.3390/cells13171410
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