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3 ± 0.5) and SAP groups (6.9 ± 1.0). Furthermore, the downregulation of Tim-3 significantly aggravated mouse pancreatic tissue damage. It was further shown that Tim-3 negatively regulated the production of pro-inflammatory cytokines, IL-6 and TNF-α, as well as anti-inflammatory cytokine IL-10. Of note, the negative regulation of inflammatory cytokines by Tim-3 was mediated by the activation of TLR4/MyD88 NF-kB signaling pathway. CONCLUSION Our study showed that Tim-3 might play an important role in the development of AP through regulating the inflammatory response.BACKGROUND Emerging evidence suggests that secretome of mesenchymal stem cells has many anti-inflammatory and regenerative properties, which makes it a suitable candidate for the treatment of autoimmune and degenerative diseases. Dipeptidyl Peptidase-IV (DPP-IV)/CD26 and Aminopeptidase N (APN)/CD13 are ubiquitous ecto-enzymes which can digest various substrates including some chemokines and neuropeptides that are involved in inflammatory conditions. OBJECTIVE To evaluate the enzymatic activity of DPP-IV/CD26 and APN/CD13 in MSC conditioned media (MSC-CM). METHODS The MSCs were isolated from the mouse's abdominal adipose tissues and were cultured with or without preconditioning by adding phorbol 12-myristate 13-acetate (PMA) or lipopolysaccharide (LPS). The levels of interleukin-10 (IL-10), nitric oxide (NO), as well as the enzymatic activities of DPP-IV/CD26 and APN/CD13 were measured in MSC-CM. RESULTS The level of IL-10 and the enzyme activity of APN/CD13 did not show any changes in the MSC-CM of stimulated and non-stimulated cells. However, NO production was increased after treatment by LPS or PMA; nevertheless, the DPP-IV/CD26 activity was decreased in MSC-CM merely following the stimulation of cells with LPS. CONCLUSION Our results indicated that MSC-secretome had DPP-IV/CD26 and APN/CD13 activity. The DPP-IV/CD26 activity was decreased following stimulation of MSCs by toll-like receptor 4 agonist. Further studies are needed to reveal the possible contribution of DPP-IV/CD26 and APN/CD13 in the anti-inflammatory functions of MSC-CM.BACKGROUND Tegument protein pp150 of cytomegaloviruses (CMVs) plays a vital role in all stages of viral life cycle, representing the most important tegument protein candidate for HCMV treatment. However, the exact role of pp150 in immune regulation is yet to be elucidated. OBJECTIVE To examine the effects of pp150 on the maturity and function of murine dendritic cells (DCs). METHODS Maturity status (CD40, CD86, and MHC-II expression) and phagocytic capacity of DCs (dextran uptake assay) were characterized. Gene expression profiles of ROR-γ, GATA-3, T-bet, and FOXP-3 as well as the protein expression of INF-γ (Th1), IL-4 (Th2), IL-35 (Treg), IL-17A (Th17), IL-22, TNF-α, IL-6, and IL-2 were evaluated in T cells co-cultured with DCs. RESULTS A significant increase in CD40, CD86, and CCR7 expression and a reduction in the phagocytosis rate were observed in pp150-stimulated DCs compared with unstimulated DCs. T cells co-cultured with stimulated DCs showed higher expressions of ROR-γ, IL-6, IL-2, IL-17A, IL-22, and TNF-α. CONCLUSION Despite improvements in maturity status, pp150-stimulated DCs did not seem to be able to induce Th1 or Th2 immunity. In fact, Th17 and its mediators, IL-17A and IL-22, might be the main inflammatory factors involved in pp150-stimulated DC's mechanism of action. However, it is necessary to conduct further investigations to corroborate these observations.BACKGROUND Melanoma is a common and malignant cutaneous tumor, which is responsible for a large proportion of skin cancer deaths. Dendritic cell (DC)-based vaccines have achieved positive results in the treatment of melanoma because of their ability to induce cytotoxic response to facilitate tumor elimination. OBJECTIVE To improve the efficacy of dendritic cell-based vaccines by the adjuvant activity of Helicobacter pylori neutrophil activating protein (HP-NAP). METHODS The recombinant HP-NAP (rHP-NAP) was expressed by using prokaryotic expression system. DCs were cultured with granulocyte-macrophage colony-stimulating factor (GM-CSF) and IL-4. After treating with rHP-NAP, the maturation of DCs and dendritic cell-based vaccine were assayed by using flow cytometry and qRT-PCR. The activation and proliferation of T cells were measured by FCM, ELISA and MTT methods. The tumor specific cytotoxic response to resistant B16F10 was detected by using lactate dehydrogenase-release assay and qRT-PCR. RESULTS The rHP-NAP, prepared from E. coli prokaryotic expression system, was able to significantly promote the maturation of dendritic cell-based vaccine loaded with tumor cell lysate (TCL) of B16F10 (DC-B16F10-TCL). Dactolisib cell line Furthermore, it effectively induced the activation and proliferation of T cells and tumor specific cytotoxic response to resistant B16F10 melanoma tumor cells. CONCLUSION These results suggested that rHP-NAP possesses the potential for use as an adjuvant of dendritic cell-based vaccine in anti-melanoma treatment.BACKGROUND Patient immune status might be indicative of the variance in bacterial genetics in drug-resistant tuberculous pleuritis and could be used for predicting the risk of multi-drug resistant tuberculous pleuritis (MDR-TB). OBJECTIVE To determine the significance of Th2/Th1 ratio and concentration of PD-L1 in the pleural effusions for prediction of MDR-TB. METHODS We measured the ratio of Th2 to Th1 T cells from pleural effusions in 373 tuberculous pleuritis patients. We also measured the concentration of programmed death ligand-1 (PD-L1) in the pleural effusions of these patients. Afterwards, we determined the optimal cut-off value for predicting the occurrence of multi-drug resistant tuberculous based on the Youden index, diagnostic evaluation test, and receiver operation curve. Multiple logistic analysis was employed to identify the independent risk factors for MDR-TB occurrence. RESULTS The area under the curve (AUC) of the Th2 to Th1 ratio was 0.66 and the concentration of PD-L1 was 0.71. Based on the combined detection of PD-L1 concentration in pleural effusion and the Th2 to Th1 ratio, our AUC was 0.81 and had a specificity of 0.92. Only a combined detection was able to identify patients developing multidrug-resistant tuberculosis. Multiple logistic analysis showed that a high concentration of PD-L1 and a high Th2 to Th1 ratio in pleural effusions were indicative of an immunocompromised status. Therefore, these measurements might be independent risk factors for the occurrence of multidrug-resistant tuberculous. CONCLUSION Evaluation of immune status based on PD-L1 pleural concentration and Th2 to Th1 ratio might predict the risk of MDR-TB occurrence.