简介：AbstractObjective:To investigate and analyze changes of T lymphocyte and other lymphocyte subsets in the peripheral blood of patients with coronavirus disease 2019 (COVID-19), with the goal of improving clinical understanding and the value of research applications.Methods:General data of 66 confirmed COVID-19 patients admitted to the Fifth Medical Center of Beijing PLA General Hospital from January 2 to March 23, 2020 were collected in this retrospective case-control observational study, and they were divided into mild (n=26), mid-grade (n=19), and severe/critical disease groups (n=21) according to disease severity. Neutrophils, lymphocytes, neutrophil/lymphocyte ratios, CD4 absolute counts, CD8 absolute counts, and CD4/CD8 expression ratios of peripheral whole blood among the three patient groups were compared. The study protocol was approved by the Ethics Committee of the Fifth Medical Center, General Hospital of Chinese PLA (approval No. 2020-69-D) on May 5, 2020.Results:Among the 66 COVID-19 patients examined, 38 were male and 28 were female, with an average age of 53 ± 17 years. Among patients, 26 cases were mild, 19 cases were mid-grade, and 21 cases were severe/critical. Neutrophils, neutrophil/lymphocyte ratios, and CD4+/CD8+ ratios of the severe/critical group were significantly higher compared with mild and mid-grade groups (P < 0.01); however, there was no obvious difference between mid-grade and mild groups (P > 0.05). Lymphocytes, CD4 absolute counts, and CD8+ absolute counts of the severe/critical group were significantly lower compared with mild and mid-grade groups (P < 0.01); however, there was no significant difference between mid-grade and mild groups (P > 0.05).Conclusion:Counts of lymphocytes and T lymphocytes in severe/critically ill patients were decreased, which is of great significance for the identification of severe and critical COVID-19 patients.

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简介：AbstractObjective:To investigate the expressions of MAPK10, c-Jun and Itga6 in laryngeal carcinoma and its influence on the sensitivity to docetaxel, cisplatin and 5-fluorouracil (TPF) chemotherapy.Methods:Fifty-seven patients with supraglottic squamous cell carcinoma, who were treated by two cycles of TPF induction chemotherapy in our hospital, were enrolled in this study and divided into groups by chemotherapy resistance or chemotherapy sensitivity. The expressions of mRNA and protein of MAPK10, c-Jun and Itga6 in tumor tissues were evaluated by immunohistochemistry. The consistency of mRNA and protein expressions was tested, and the relation with the clinicopathological features was analyzed.Results:The positive rates of MAPK10 andc-Jun in the tumor tissues of the sensitive group were significantly higher than those of there assistant group, which was 90.48% and 100.00%, respectively. The expression rate of Itga6 was significantly higher in the resistant group, which was 83.33% (P < 0.05). The mRNA levels of MAPK10 and c-Jun were significantly lower in the resistant group than in the sensitive group, whilethemRNA levelof Itga6was significantly higher in the resistant group (P < 0.05). The protein expressions of MAPK10, c-Jun and Itga6 were consistent with their mRNA expressions (P < 0.05). The expressions of MAPK10, c-Jun and Itga6 were not correlatedwithage, gender and tumor diameter (P > 0.05). However, the expressions of MAPK10 and c-Jun were negatively correlated withclinical stage and pathological grading (P < 0.05). Negative correlations between MAPK 10 and Itga6, and between c-Jun and Itga6in tumor tissues were found by Spearman’srank correlation coefficient (P < 0.05). The correlation was also negative in the resistant tumor tissues (P < 0.05).Conclusion:The MAPK10 and c-Jun expressions were down-regulated, while the Itga6 expression was up-regulated in the chemo-resistant laryngeal carcinoma, and the expression levels of different factors were correlated witheach other. These factorsmight be important biomarkers for predicting outcomes of TPF chemotherapy in laryngeal carcinoma in the future.