Condition Focus: TMJ Joint Inflammation — Leukocyte Recruitment and Cytokine Modulation

The temporomandibular joint (TMJ) shares key structural features with the MTP joint targeted by the G.O.A.T.: both are small, enclosed synovial joints where inflammation produces rapid swelling and severe pain within a confined space. This study examined PBM’s anti-inflammatory effects in a TMJ inflammation model, measuring leukocyte chemotaxis (immune cell recruitment), cytokine levels, and purinergic receptor modulation.

Using 808 nm laser at 50 J/cm², the researchers demonstrated that PBM inhibited leukocyte chemotaxis — reducing the migration of immune cells toward the inflamed joint. This is significant because during a gout flare, the massive neutrophil influx is what transforms a local crystal deposition event into the explosive, excruciating clinical picture that patients experience.

The cytokine panel showed the familiar PBM signature: TNF-α and IL-1β reduced, IL-10 increased. But the study also measured CINC-1 (a rat analogue of IL-8, a potent neutrophil attractant) and P2X3/P2X7 purinergic receptors, which are involved in both pain signalling and inflammasome activation. P2X7 receptor activation is directly linked to NLRP3 inflammasome assembly — the same pathway that drives gout flares.

G.O.A.T. for Gout Alignment:
The 808 nm wavelength used here is close to the G.O.A.T.’s 850 nm NIR output. The small enclosed joint model parallels the MTP joint anatomy. The cytokine profile matches gout pathology exactly (TNF-α↓, IL-1β↓, IL-10↑), and the P2X7 receptor modulation suggests PBM may influence NLRP3 assembly at the receptor level.

Link to original research here

Editor’s note: The leukocyte chemotaxis inhibition here parallels the neutrophil infiltration data in Alves et al 2014. The cytokine profile matches the dual-wavelength findings in Shamloo et al 2023. The P2X7 receptor connection to NLRP3 is detailed in the gout cascade review by Kingsbury et al 2011. For the vascular permeability component of joint edema, see PBM and Edema 2025.

Related Articles

• Effect of PBM on Inflammatory Mediators and Neutrophils in Joint Inflammation – Alves et al 2014
• PBM Suppresses NLRP3 Inflammasome Outputs with Dual Wavelength – Shamloo et al 2023
• The Role of the NLRP3 Inflammasome in Gout – Kingsbury et al 2011
• PBM on RA and OA: Edema and Vascular Permeability – Fonseca et al 2025
• PBM Improves Acute Inflammation via Cannabinoid Receptor Activation – Neves et al 2018

Key Takeaways

• 808 nm PBM inhibits leukocyte chemotaxis — reducing immune cell recruitment to inflamed joint
• TNF-α↓, IL-1β↓, IL-10↑ — the exact cytokine reversal needed in gout
• P2X7 receptor modulation links to NLRP3 inflammasome assembly pathway
• Small enclosed joint model (TMJ) parallels MTP joint anatomy

Study Overview

Full Citation

PBM inhibits inflammation in the temporomandibular joint of rats. (2021). Journal of Photochemistry and Photobiology B: Biology, 222, 112281. View Publication