The application of human gastric organoid models in gastric mucosal immunity and disease research

I. Establishment and Technical Advantages of Gastric Organoid Models

Human gastric organoids are three-dimensional in vitro culture systems derived from pluripotent stem cells or adult gastric tissue stem cells, capable of highly simulating the complex structure and physiological functions of gastric mucosa. Their construction typically relies on specific combinations of growth factors (such as EGF, Wnt3a, Noggin, R-spondin1, etc.), inducing stem cells to self-organize and differentiate in extracellular matrix gels, forming three-dimensional miniature organs containing gland-like structures, various epithelial cell types (such as parietal cells, chief cells, mucous cells, endocrine cells), and functional crypt-villus axes. Compared to traditional two-dimensional cell lines, gastric organoid models demonstrate significant advantages in genetic stability, cellular heterogeneity, tissue polarity, and physiological relevance, providing an unprecedented platform for studying gastric development, homeostasis maintenance, and disease mechanisms.

II. Cytokine Network in Gastric Organoid Models

As key mediators of intercellular communication, cytokines play a central role in the culture, differentiation, and functional maintenance of gastric organoids, forming a precise regulatory network:

1. Growth and Differentiation Regulatory Factors:

- Epidermal Growth Factor Family: EGF and its receptor signaling are fundamental for maintaining gastric epithelial cell proliferation and survival, crucial for long-term organoid culture.

- Wnt/β-catenin Signaling Pathway Ligands: Wnt3a and R-spondin1 are key factors for maintaining gastric stem cell stemness and promoting crypt-like structure formation.

- Bone Morphogenetic Protein Inhibitors: Noggin creates a microenvironment conducive to stem cell self-renewal by inhibiting BMP signaling.

- Fibroblast Growth Factors: FGF10 and others participate in gastric gland morphogenesis and cell fate determination.

2. Inflammation and Immune-related Factors: When simulating pathological states, gastric organoids can respond to and produce various inflammatory cytokines.

- Pro-inflammatory Cytokines: Such as interleukin-1β, interleukin-6, tumor necrosis factor-α, etc., can be produced by epithelial cells or co-cultured immune cells under Helicobacter pylori infection or inflammatory stimulation, simulating gastritis conditions.

- Chemokines: Such as CXCL1, CXCL8, etc., can recruit immune cells and are significant for studying host-pathogen interactions and immune microenvironment remodeling.

- Interferons: Type I and II interferons participate in antiviral defense and immune regulation.

3. Damage Repair and Fibrosis-related Factors: In simulating mucosal damage or repair processes, transforming growth factor-β, platelet-derived growth factor, and other cytokines participate in epithelial regeneration, mesenchymal cell activation, and extracellular matrix remodeling.

III. Applications in Gastric Disease Mechanism Research

Gastric organoid models combined with cytokine regulation provide unique tools for in-depth analysis of various gastric disease mechanisms:

1. Helicobacter pylori Infection and Chronic Gastritis:

- By co-culturing Helicobacter pylori with gastric organoids, direct observation of pathogen colonization, morphological changes in epithelial cells caused by virulence factors like CagA, proliferation abnormalities, and bursts of inflammatory cytokine secretion (e.g., IL-8) can be achieved, enabling real-time study of early infection events and host immune responses.

2. Autoimmune Gastritis:

- Introducing patient-derived autoantibodies or immune cells can study how anti-parietal cell antibodies damage gastric epithelium through complement activation or antibody-dependent cell-mediated cytotoxicity, and analyze the resulting cytokine release profiles.

3. Gastric Cancer Initiation and Development:

- Introducing specific driver mutations (e.g., TP53, CDH1, ARID1A) into normal gastric organoids using gene editing techniques, combined with chronic inflammatory cytokine stimulation, can progressively simulate the sequence from normal mucosa → atrophic gastritis → intestinal metaplasia → dysplasia → gastric cancer, elucidating the role of cytokines in the inflammation-cancer chain.

4. Drug Screening and Toxicity Testing:

- Gastric organoids can be used to test the efficacy and toxicity of chemotherapy drugs, targeted drugs, or novel anti-inflammatory drugs on gastric epithelium, and evaluate their regulatory effects on mucosal inflammatory states by monitoring cytokine profile changes.

IV. Research Tools: Manipulation and Detection of Cytokines in Organoid Experiments

Precise manipulation and detection of cytokine networks in gastric organoid models are key to mechanistic research:

1. Exogenous Manipulation:

- Adding recombinant cytokines or neutralizing antibodies to the culture system can specifically activate or inhibit certain pathways, observing their effects on organoid growth, differentiation, death, or barrier function.

- Using cytokine gradients or localized release systems can simulate complex spatiotemporal distribution patterns in vivo.

2. Endogenous Detection:

- Collecting organoid culture supernatants and using multiplex liquid chip assays or enzyme-linked immunosorbent assays to quantitatively analyze secreted cytokine profiles.

- Performing single-cell RNA sequencing on organoids can resolve cytokine expression dynamics in different cell subsets at the transcriptome level.

- Using immunofluorescence or in situ hybridization techniques to spatially localize specific cytokines at the protein or mRNA level.

V. Which Manufacturers Provide Human Gastric Organoid Cytokines?

Nanjing U-APEX Biotech's self-developed Stomach organoids Cytokine Set, Human (Catalog No.: UA090030) is a ready-to-use cytokine combination that has undergone systematic optimization and rigorous functional validation, specifically designed to support efficient culture, expansion, passage, and differentiation of human gastric organoids. This set selects various highly active recombinant cytokines that play critical roles in gastric epithelial cell fate determination, proliferation maintenance, and lineage differentiation, providing a stable and reliable one-stop solution for gastric development, disease modeling, drug screening, and regenerative medicine research.

Nanjing U-APEX Biotech is committed to providing high-quality, functionally defined cytokine tools for organoid science, developmental biology, and disease model research. For detailed component lists, specific concentrations, standard culture protocols, or customization inquiries regarding the Stomach organoids Cytokine Set, Human (Catalog No.: UA090030), please feel free to contact me.