Effects of vitamin C combined with rbFGF on inflammatory factors and oxygen environment in patients with high-voltage electrical burns

To investigate the effect of vitamin C combined with recombinant basic fibroblast growth factor (rbFGF) on inflammatory factors and oxygen environment in patients with high-voltage electrical burns. A retrospective analysis of 98 patients with high-voltage electrical burns admitted to our hospital from January 2021 to April 2022. A total of 98 patients were divided into research group and control group, including 49 cases treated with vitamin C combined with rbFGF and 49 cases treated with only rbFGF. The disappearance time of clinical symptoms, wound healing rate, area of granulation tissue growth, level of inflammatory factors, oxygen environment were compared between two groups after one and three courses of treatment. After treatment, the disappearance time of erythema, pain, swelling, blisters, exudate symptoms, wound healing time, scab formation time, and hospitalisation time in the research group were significantly better than those in control group (P < .05). There was no significant difference in the wound healing rate and area of granulation tissue growth between the two groups after one course of treatment (P > .05), while it is significantly better than those in control group after three courses of treatment (P < .05). The inflammatory factors, succinate dehydrogenase (SDH), lactate dehydrogenase (LDH) scores in research group were significantly better than that in control group after three courses of treatment (P < .05). Vitamin C combined with rbFGF may be worthy to reduce inflammatory factors, regulate oxygen environment, which can be popularised and applied in clinical practice.

Analysis of hypoxia-associated dendritic cells in colitic mice and effects of probiotics on IL-10 production in inflammatory dendritic-cells under hypoxia

The aim of this study was to analyse hypoxia-associated dendritic cells (DCs) in colitic mice and the effects of probiotics on interleukin (IL)-10 production in inflammatory DCs under hypoxic conditions. Extensive hypoxia was observed in the colonic mucosa of dextran sodium sulphate-induced colitic mice. Flow cytometric analysis demonstrated that hypoxia-inducible factor-1α⁺ DCs in colonic lamina propria (CLP) lymphocytes and mesenteric lymph nodes (MLN) were more abundant in colitic mice than those in controls. Among three subsets of DCs, i.e. plasmacytoid DCs, conventional DCs (cDCs), and monocyte-derived DCs (mDCs), cDCs and mDCs were more abundant in CLP of colitic mice. Bone marrow-derived Flt-3L-induced DCs (Flt-DCs) but not bone marrow-derived GM-CSF-induced DCs (GM-DCs), incubated with 1% O₂ exhibited an inflammatory phenotype, with higher CD86, IL-6, and tumour necrosis factor-α expression, and lower IL-10 levels than those in Flt-DCs incubated with 21% O₂. The hypoxia-induced decrease in IL-10 expression in Flt-DCs was restored by Bifidobacterium bifidum JCM 1255^T promoted IL-10 expression through the p38 pathway under normoxic conditions. The anti-inflammatory effects of B. bifidum JCM 1255^T in Flt-DCs were mediated through different cellular mechanisms under hypoxic and normoxic conditions. B. bifidum JCM 1255^T could be used therapeutically for its anti-inflammatory effects.