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P gingivalis lipopolysaccharide lps

Manufactured by InvivoGen
Sourced in United States

P. gingivalis lipopolysaccharide (LPS) is a laboratory product derived from the cell wall of the bacterium Porphyromonas gingivalis. It is a known Toll-like receptor 4 (TLR4) agonist and can be used to stimulate immune responses in in vitro and in vivo studies.

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3 protocols using p gingivalis lipopolysaccharide lps

1

Isolation and Stimulation of Peritoneal Macrophages

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Macrophages were harvested from the peritoneal cavity of 8-week-old male WT and Tgfbr1G188V/+ mice at 3 days after injection of thioglycollate (Yamaba et al., 2015 (link)) and seeded on 6-well plates. After 2 h of incubation, non-adherent cells were washed out and the remaining cells were subjected to further analysis. The peritoneal macrophages were stimulated with 1 Uμg/ml P. gingivalis lipopolysaccharide (LPS) (InvivoGen, Inc., San Diego, CA, United States) for the indicated times and then total RNA was isolated for quantitative PCR analysis.
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2

Macrophage Polarization by P. gingivalis

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BMDMs stimulated with 1 μg mL-1P. gingivalis lipopolysaccharide (LPS) (InvivoGen, San Diego, CA, USA) plus 20 ng mL-1 interferon-γ (IFN-γ) (Gibco) or 20 ng -1 IL-4 (Gibco) were used as M1 and M2 positive controls, respectively, for gating in flow cytometry. Cells infected with P. gingivalis with or without Stattic, the positive control groups, and BMDMφ were collected, treated with anti-mouse CD16/32 (TruStain FcX™ PLUS, Biolegend, #156603, San Diego, CA, USA), and then incubated with anti-mouse CD86-fluorescein isothiocyanate (FITC) antibody (clone GL-1, Biolegend, #105005) and anti-mouse CD206-allophycocyanin (APC) antibody (clone C068C2, Biolegend, #141707). according to the manufacturer's instructions. The labeled cells were then analyzed on a Beckman Coulter FC500 flow cytometer (Beckman Coulter Pty Ltd., NSW, Australia), and data were analyzed using FlowJo (v10, BD, Ashland, USA).
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3

Topical Application of Microbial Agents in Maxillary Tissue

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We have developed a method to apply chemical therapeutic agents topically to the mouse maxillary tissue [24 (link), 78 (link)]. We used the maxillary topical application (MTA) model to apply oral microbial components [8 (link)]. The present study used the MTA model using 1 μg/ml unmethylated CpG oligonucleotide (CpG ODN: InvivoGen, San Diego, CA) or P. gingivalis lipopolysaccharide (LPS: InvivoGen). First, a custom-made oral appliance was fabricated using clear dental resin, covering the maxillary/palatal tissue between the molars. Mice were anesthetized and placed on a supine position. CpG ODN (3 μl) or LPS (3 μl) was pipetted over the maxillary tissue and the oral appliance was placed to hold the solution with a bite block for 1 hr in an anesthetization chamber. Mice were then transferred to the operation table and the oral appliance and bite block were removed. In general, there was no remaining solution in the mouth. Mice were returned to the cage in the vivarium. On Day 4 of the MTA, mice were euthanized by 100% CO2 inhalation and the maxillary tissue was harvested and fixed with 10% buffered formalin for histological evaluation.
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