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Ethanol Intoxication and Burn Injury Increases Intestinal Regulatory T Cell Population and Regulatory T Cell Suppressive Capability. | LitMetric

AI Article Synopsis

Article Abstract

Traumatic injuries, such as burn, are often complicated by ethanol intoxication at the time of injury. This leads to a myriad of complications and post-burn pathologies exacerbated by aberrant immune responses. Recent findings suggest that immune cell dysfunction in the gastrointestinal system is particularly important in deleterious outcomes associated with burn injuries. In particular, intoxication at the time of burn injury leads to compromised intestinal T cell responses, which can diminish intestinal immunity and promote bacterial translocation, allowing for increased secondary infections in the injured host and associated sequelae, such as multiple organ failure and sepsis. Regulatory T cells (Treg) have been identified as important mediators of suppressing effector T cell function. Therefore, the goal of this study was to assess the effects of ethanol intoxication and burn injury on Treg populations in small intestinal immune organs. We also evaluated the suppressive capability of Tregs isolated from injured animals. Male C57BL/6 mice were gavaged with 2.9 g/kg ethanol before receiving a ∼12.5% total body surface area scald burn. One day after injury, we identified a significant increase in Tregs number in small intestine Peyer's patches (∼×1.5) and lamina propria (∼×2). Tregs-producing cytokine IL-10 were also increased in both tissues. Finally, Tregs isolated from ethanol and burn-injured mice were able to suppress proliferation of effector T cells to a greater degree than sham vehicle Tregs. This was accompanied by increased levels of IL-10 and decreased levels of pro-proliferative cytokine IL-2 in cultures containing ethanol + burn Tregs compared with sham Tregs. These findings suggest that Treg populations are increased in intestinal tissues 1 day following ethanol intoxication and burn injury. Tregs isolated from ethanol and burn-injured animals also exhibit a greater suppression of effector T cell proliferation, which may contribute to altered T cell responses following injury.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8758514PMC
http://dx.doi.org/10.1097/SHK.0000000000001853DOI Listing

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