CD11c is a member of the β2‐integrin family typically used to define myeloid dendritic cells (DCs). Recent reports identify CD11c‐expressing CD8+ T cells as a new subset of CD8+ regulatory T cells (Treg). Evidence exists that CD11c+CD8+ T cells may exert their effector or regulatory functions under different conditions. To date, no studies have addressed the frequency of CD11c+ T cells in cancer. Limited evidence exists in terms of expression of immune‐checkpoint receptors, programmed cell death protein 1 (PD‐1) and T‐lymphocyte‐associated antigen 4 (CTLA‐4), as well as forkhead box P3 (Foxp3) in mouse lymphoid organs. Here, we have assessed CD11c+CD8+ and CD11c+CD4+ T cells, Foxp3, PD‐1, and CTLA‐4 expressing CD4+ T cells and CD8+ T cells in different tissues from three groups of male BALB/c mice—young, mature, and those with colorectal cancer (CRC). Analysis of CD3+CD11c+ T cells in the bone marrow (BM), spleen, and lymph nodes (LN) in each group showed a higher percentage of CD3+CD11c+ T cells in the BM from all groups and in the lymphoid organs of the cancer group compared with the young and mature groups. CD4low and CD4high cell fractions in mice BM have different expression patterns for Foxp3 and CTLA‐4. We have observed a higher frequency of CD8+PD‐1+ T cells in the BM, spleen, and LN of CRC mice compared with normal mice. T‐cell exhaustion is associated with inhibitory receptor PD‐1. According to the regulatory roles of CD11c expression in CD8+ T cells, we have proposed that the elevated percentage of CD11c, Foxp3, CTLA‐4, and PD‐1 expressing T cells were associated with immune response dysregulation in CRC.
Background: Hepatitis E virus (HEV) infection is a self-limited hepatitis and the most common cause of acute adult hepatitis in Asia. Young adults and middle-aged populations are more likely to be infected than other age groups. Objectives: The aim of this study was to determine the seroprevalence of anti-HEV among injection drug users (IDUs) compared to nonIDUs. Patients and Methods:This was a cross-sectional study performed on 131 IDUs referred to Farshchian Hospital, Hamadan, Iran and 131 nonIDUs selected from healthy visitors between March 2011 and March 2012. Anti-HEV IgG was measured in serum by ELISA method (DiaPro, Milan, Italy). Data including age, gender, education, location and duration of injection drug used were collected using a questionnaire. Results: In this study, the seroprevalence of hepatitis E virus antibody among IDUs group was 6.1%, and 1.5% among non-IDU group (Odds Ratio = 5.48; CI = 1/069-22/84), indicating that injection drug users were almost five and a half times more than non-IDUs at risk of HEV infection (P = 0.053). There was no significant association between seroprevalence of hepatitis E virus and education level (P = 0.46), duration of injection (P = 0.38) and location (P = 0.19). Conclusions: Seroprevalence of hepatitis E virus among IDUs group was higher than non-IDU group, which might be due to possible blood transmission of HEV among IDUs.
Introdution: Muscle weakness that is caused by cancer called Cachexia. One of the causes of the formation of the cachexia is the change in protein degradation, and the ubiquitous protease and Autophagy Lysosomes system is the most important protein breakdown system. Resistance training has been one the best stimulator of increasing muscular mass. Therefore, the purpose of this study was to investigate the effect of a period of resistance training on the muscle protease activity and autophagy flux in mice with cancer induce cachexia. Methods: This study was conducted on 12 male BALB / c mice (age 6 weeks) and CT-26 tumor implanted into them. Then they were divided into two groups of resistance training (n=6) and control (n=6). Training group performed 6 weeks progressive resistance training. The protease activity was evaluated by fluorogenic substrate method and LC3B and p62 evaluated by western blot method. Independent t-test was carried out at P<0.05 for statistical analysis using Prism (7) software. Results: There was no significant difference in Proteasome activity (p=0.13), muscle weight (p=0.24), and CT26 tumor volume (p≥0.05) between two groups of resistance training and control, but p62 decreased in the resistance training group (p=0.032). Conclusion: However, the autophagy flux has improved in the part of cargo breakdown with resistance training, but perhaps the presence of a tumor inhibits muscle response to resistance training or this type of resistance training is not an appropriate intervention for treating cachectic muscle. To treat cachexia through the resistance training, either this method would be combined with other interventions or other methods of the resistance training can be applied.
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