What does this research mean for the field?

UV irradiation triggers the active release of HMGB1 from skin cells, which drives cutaneous inflammation and exacerbates photoaging through TLR4 signaling. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

Investigate whether UV irradiation and chronic photoaging stimulate extracellular HMGB1 release in skin and determine if this release promotes proinflammatory cytokine induction and tissue damage through TLR4 signaling.

August 30, 2026Journal of Cell Communication and SignalingOpen Access

Extracellular high mobility group box 1 as a UV‐induced alarmin driving cutaneous inflammation and photoaging via TLR4 signaling

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Authors

QLQian Liufu ZQZhaoping Qin YYYan Yan

Discussion

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Overview

Preclinical study demonstrates that extracellular HMGB1 drives UV-induced skin inflammation and photoaging via TLR4 signaling in cellular and animal models, indicating a therapeutic target.

Key Points

Investigate whether UV irradiation and chronic photoaging stimulate extracellular HMGB1 release in skin and determine if this release promotes proinflammatory cytokine induction and tissue damage through TLR4 signaling.
Assessed HMGB1 release and proinflammatory cytokine levels (IL-1β, IL-6, IL-8, TNF-α) in acutely UV-irradiated and chronically photoaged human skin specimens.
Quantified intracellular and extracellular HMGB1 in cultured skin cells following UV irradiation, evaluating the effects of HMGB1 knockdown and TLR4 receptor blockade.
Examined neutrophil infiltration, cytokine expression, and dermal damage following disruption of the HMGB1-TLR4 axis in UV-exposed mouse models.
UV irradiation prompted active extracellular secretion of HMGB1 without altering intracellular mRNA levels in cultured skin cells.
Extracellular HMGB1 temporally correlated with increased IL-1β, IL-6, IL-8, and TNF-α expression in human skin, while HMGB1 knockdown and TLR4 inhibition significantly attenuated cytokine induction.
Targeted disruption of the HMGB1-TLR4 axis in mice reduced neutrophil infiltration, suppressed cytokine expression, and mitigated UV-induced dermal photoaging.

Cite This Study

Liufu et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0476c1a8fb52e79c5a8 https://doi.org/10.1002/ccs3.70109

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August 30, 2026Journal of Cell Communication and SignalingOpen Access

Extracellular high mobility group box 1 as a UV‐induced alarmin driving cutaneous inflammation and photoaging via TLR4 signaling

View Full Paper

Ask AI

Bookmark

Authors

QLQian Liufu ZQZhaoping Qin YYYan Yan

Discussion

Member takes

Overview

Preclinical study demonstrates that extracellular HMGB1 drives UV-induced skin inflammation and photoaging via TLR4 signaling in cellular and animal models, indicating a therapeutic target.

Key Points

Investigate whether UV irradiation and chronic photoaging stimulate extracellular HMGB1 release in skin and determine if this release promotes proinflammatory cytokine induction and tissue damage through TLR4 signaling.
Assessed HMGB1 release and proinflammatory cytokine levels (IL-1β, IL-6, IL-8, TNF-α) in acutely UV-irradiated and chronically photoaged human skin specimens.
Quantified intracellular and extracellular HMGB1 in cultured skin cells following UV irradiation, evaluating the effects of HMGB1 knockdown and TLR4 receptor blockade.
Examined neutrophil infiltration, cytokine expression, and dermal damage following disruption of the HMGB1-TLR4 axis in UV-exposed mouse models.
UV irradiation prompted active extracellular secretion of HMGB1 without altering intracellular mRNA levels in cultured skin cells.
Extracellular HMGB1 temporally correlated with increased IL-1β, IL-6, IL-8, and TNF-α expression in human skin, while HMGB1 knockdown and TLR4 inhibition significantly attenuated cytokine induction.
Targeted disruption of the HMGB1-TLR4 axis in mice reduced neutrophil infiltration, suppressed cytokine expression, and mitigated UV-induced dermal photoaging.

Cite This Study

Liufu et al. (2026) studied this question.

synapsesocial.com/papers/6a93f0476c1a8fb52e79c5a8 https://doi.org/10.1002/ccs3.70109

View Full Paper

Ask AI

Bookmark