Method Article
Here we describe a detailed protocol for the isolation of lymphocytes from the inductive sites including the gut-associated lymphoid tissue Peyer's patches and the draining mesenteric lymph nodes, and the effector sites including the lamina propria and the intestinal epithelium of the small intestinal immune system.
The intestinal immune system plays an essential role in maintaining the barrier function of the gastrointestinal tract by generating tolerant responses to dietary antigens and commensal bacteria while mounting effective immune responses to enteropathogenic microbes. In addition, it has become clear that local intestinal immunity has a profound impact on distant and systemic immunity. Therefore, it is important to study how an intestinal immune response is induced and what the immunologic outcome of the response is V体育2025版. Here, a detailed protocol is described for the isolation of lymphocytes from small intestine inductive sites like the gut-associated lymphoid tissue Peyer's patches and the draining mesenteric lymph nodes and effector sites like the lamina propria and the intestinal epithelium. This technique ensures isolation of a large numbers of lymphocytes from small intestinal tissues with optimal purity and viability and minimal cross compartmental contamination within acceptable time constraints. The technical capability to isolate lymphocytes and other immune cells from intestinal tissues enables the understanding of immune responses to gastrointestinal infections, cancers, and inflammatory diseases.
The gastrointestinal (GI) tract has many folds and protrusions that represents the largest interface separating the internal body and the external environment. The intestinal immune system plays an essential role in maintaining the barrier function of the GI tract. It is constantly exposed to dietary antigens, commensal bacteria, and pathogenic microbes. As such, it must remain tolerant to food antigens and commensal bacteria while preserving the capacity to rapidly generate an effective immune response to enteropathogenic microbes1 VSports. The intestinal immune system can be anatomically divided into inductive sites, where naïve lymphocytes are .
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All animal experiments were conducted in accordance with National Institute of Health guidelines and approved by the Stony Brook University Institutional Animal Care and Use Committee.
NOTE: Ensure that all approvals are granted prior to performing procedures.
1. Solution Preparation
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A schematic representation of the protocol is depicted (Figure 1). Lymphocytes within the intestinal mucosa inductive and effector sites are distinctly organized. Peyer's patches (PP) and mesenteric lymph nodes (MLN) contain lymphocytes in well-organized T-cell areas and B-cell follicles, whereas the intestinal epithelium contains lymphocytes that are more diffusely distributed V体育ios版. The lamina propria (LP) contains both diffusely distributed lymphocytes and l.
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A detailed protocol is presented for the isolation of lymphocytes from the intestinal mucosal inductive (MLN and PP) and effector (LP and IEL compartment) sites. The protocol has been developed to balance input (time) and output (viability and yield) to maximize productivity and results. The protocol also ensures minimal cross compartmental contamination between LP and IEL compartments V体育平台登录.
Several protocols for the isolation of immune cells from the mouse small intestine have been published
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The authors have nothing to disclose.
B. S VSports在线直播. S. is supported by NIH grant (R01 AI076457) and funds provided by Stony Brook University. Z. Q. is supported by NIH grant (K12 GM102778). .
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| Name | Company | Catalog Number | Comments |
|---|---|---|---|
| HEPES | Fisher Scientific | BP310-500 | |
| L-glutamine | Sigma-aldrich | G3126-100G | |
| Penicillin-Streptomycin | Life Technologies | 15140-122 | |
| Gentamicin | Life Technologies | 15710-072 | |
| Sodium Hydroxide | Fisher Scientific | S318-500 | |
| RPMI 1640 | Life Technologies | 21870-076 | |
| Sodium bicarbonate | Fisher Scientific | S233-500 | |
| Fetal bovine serum | Life Technologies | 26140-079 | |
| 10x Hanks' balanced salt solution | Sigma-aldrich | H4641-500ML | |
| 1,4-Dithioerythritol | Sigma-aldrich | D9680-5G | |
| 0.5M EDTA, pH 8.0 | Life Technologies | 15575-020 | |
| Calsium chloride hexahydrate | Sigma-aldrich | 21108-500G | |
| Magnesium chloride hexahydrate | Sigma-aldrich | M2670-100G | |
| Collagenase, Type I | Life Technologies | 17100-017 | |
| DG gradient stock solution (Percoll) | GE Healthcare | 17-0891-01 | |
| Red Blood Cell Lysis Buffer | Biolegend | 420301 | |
| 70-µm cell strainer | Corning | 352350 | |
| 14 mL Polypropylene Round-Bottom Tube | Corning | 352059 | |
| Erlenmeyer flask | Kimble | 26500R-50mL | |
| Magnetic stirrer | Thermo Fisher | 50094596 | |
| Stir bar | Fisher Scientific | 14-512-148 |
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