Objective To preliminarily explore the effects of human microRNA-181a on migration of gastric cancer cells and its mechanism.Methods The expression of miRNA-181a-5p in gastric cancer cell line GC9811 and peritoneal high metastasis gastric cancer cell line GC9811-P were tested by quantitative real-time polymerase chain reaction (qRT-PCR ). GC9811 cell line was transfected byendogenous synthetic analog mimic and its homologous negative control of miRNA-181a-5p,which were considered as up-regulated group and its control group respectively;GC9811-P were transfected by miRNA inhibitor and its homologous negative control of miRNA-181a-5p,which were considered as down-regulated group and its control group respectively.After miRNA-181a-5p was up or down-regulated,cell proliferation,migration and apoptosis capabilities of gastric cells were detected by matrix thiazolyl tetrazollium (MTT)assay,cloning-forming assay,Transwell migration test,wound healing assays and apoptosis test.After miRNA-181a-5p was up or down regulated,the changes of matrix metalloproteinase (MMP)14 expression were determined by Western blot.Independent sample t test was performed for mean comparison between samples and chi square test was used for rate comparison.Results The results of qRT-PCR showed the relative expression quantity of miRNA-181a-5p in GC9811 was 1 .000 00 ± 0.021 26 and in GC9811-P was 3.175 61 ±0.106 76,and the difference was statistically significant (t =34.620,P <0.01 ).The results of MTT assay indicated that the cell proliferation rate of up-regulated group was higher than that of up-regulated control group,and that of down-regulated group was lower than down-regulated control group.The cloning-forming assay demonstrated that the number of clone forming and clone forming rate of up-regulated group,up-regulated control group,down-regulated group and down-regulated control group were 234.00±10.12 and 46.8%,93.00±9.61 and 18.6%,51 .00 ±7.96 and 10.2%,99.00±8.05 and 19.8%,respectively.The differences between up-regulated group,down-regulated group and their control group were statistically significant (t = 17.500,7.344,χ2 = 12.27, 9.51 ,all P <0.01).The results of Transwell migration experiment showed the number of cells migrated through membrane hole of up-regulated group was 164.00±19.31 ,and which was higher than that of up-regulated control group (87.00±23.04,t=4.436,P <0.05);that of down-regulated group was 157.00± 11 .50,and which was lower than that of down-regulated control group (234.00 ±12.12,t =7.982,P <0.05).The result of wound healing assays indicated that the rate of migration distance of up-regulated group,up-regulated control group,down-regulated group and down-regulated control group were 2.09 ± 0.18,1 .27 ±0.23,1 .15 ±0.15 and 1 .67 ±0.12,respectively.The differences between up-regulated group,down-regulated group and their control group were statistically significant (t =4.863 and 4.689, both P <0.05).The results of apoptosis experiments demonstrated that the apoptosis rate of up-regulated group,up-regulated control group,down-regulated group and down-regulated control group were (6.10± 1 .02 )%,(9.10 ± 2.13 )%,(12.70 ± 1 .23 )%,(8.70 ± 2.54 )%,respectively,and there was no statistically significant difference between up-regulated group,down-regulated group and their control group (both P *0.05).The results of Western blot showed that the grey value of up-regulated group was 561 .881 ±35 .740,which was higher than that of up-regulated control group (275 .784±23.520);that of down-regulated group was 579.565 ±37.950,which was lower than that of down-regulated control group (1 312.760±51 .270),and the differnces were statistically significant (t =11 .580 and 19.910,both P <0.01).Conclusion miRNA-181a-5p highly expresses in peritoneal high metastasis gastric cancer cell line GC9811-P and promoted the proliferation and migration of gastric cancer cell line GC9811 and GC9811-P with a tendency to suppress apoptosis.

Objective To investigate the expression of microRNA-29b (miR-29b) in gastric cancer cell line GC9811 and high peritoneal metastatic gastric cancer cell line GC9811-P and its effect on invasion,proliferation and apoptosis.Methods The relative quantitative expression of miR-29b was detected by quantitative realtime polymerase chain reaction(qRT PCR).GC9811 cells were divided into three groups,miRNA down-regulated and transfected with lentiviruses LV-miR-29b inhibitor group,negative control group with negative transfection,and untransfected blank control group.GC9811-P cells were divided into three groups,miR-29b up regulated and transfected with lentiviruses LV miR 29b group,negative control with negative transfection group,and untransfected blank control group.The cell invasion ability was detected with Transwell assay,the cell proliferation ability was measured by methyl-thiazolyl tetrazolium (MTT) test,the colony forming ability was determined by plate colony formation assay,and the apoptosis was tested by flow cytometry.The expressions of miR 29b and secreted protein,acidic and rich in cystenie (SPARC) in gastric cell line GC9811-P,GC9811,MKN28M,MKN28NM and normal gastric cell line GES were determined by qRT-PCR,and the correlation was analyzed.Two independent samples t test or SNK-q test was performed for mean comparison between two groups,and one way analysis of variance was used for mean comparison among three groups.Results The relative quantitative expression of miR-29b inGC9811-P (0.21±-0.04) was significantly lower than that of GC9811 (1.00±0.03,t 28.140,P＜ 0.01).After GC9811 cells transfected with lentiviruses LV-miR-29b inhibitor,the expression of miR-29b (0.21±0.04) was significantly lower than that of control group (0.89±0.07) and blank control group (1.00±0.04,q 12.76,14.73,both P＜0.01).Compared with negative group,the transmembrane cell number and the clonality of miRNA up-regulated group raised(274.33± 9.03 vs 110.67 ± 13.69,t=9.981,P＜0.01;131.33±4.91 vs69.67±2.33,t 11.340,P＜0.01),and the results of MTT test also shows the proliferation was increased.After GC9811-P cells transfected with LV-miR-29b,the expression of miR 29b (4.08±0.20) was significantly higher than that of negative control group (1.15±0.05) and blank control group (1.00±0.10,q=21.73,22.81,both P＜0.01).Compared with negative group,the transmembrane cell number and the clonality of miRNA up regulated group reduced (51.33±5.55 vs 104.00±6.24,t 6.305,P＜0.01; 48.00±5.51 vs 113.33±5.17,t 11.340,P＜0.01),and the results of MTT test also shows the proliferation was weakened.Apoptosis assays demonstrated miR-29b promoted apoptosis; however,the difference was not statistically significant.The expression of miR-29b was negatively correlated with SPARC mRNA in gastric cancer cells (r=-0.97,P=0.03).Conclusions The low expression of miR-29b in high peritoneal metastatic gastric cancer cell inhibited the ability of invasion and proliferation.MiR-29b might be a new target of inhibiting peritoneal metastasis in gastric cancer.

Objective To observe the effects of exercise for weight loss summer camp on body composition, blood lipids, serum interleu-kin (IL)-6, tumor necrosis factor (TNF)-αand adiponectin of male obese adolescents. Methods 20 male obese adolescents of closed exer-cise for weight loss summer camp in 2014 were enrolled. They received aerobic exercise and diet program intervention for 4 weeks. Their body composition, blood lipid, serum IL-6, TNF-αand adiponectin were detected before and after exercise. Results Their body mass, lean body mass, body fat mass, percentage of body fat and body mass index (BMI) significantly decreased (P<0.001). And their levels of serum total cholesterol, triglyceride, low-density lipoprotein cholesterol, IL-6, TNF-αand adiponectin also decreased (P<0.05), while their adipo-nectin of per unit body fat significantly increased (P<0.01). Conclusion Exercise for weight loss summer camp can effectively bring down the obese of male obese adolescents, and improve their body composition, blood lipid metabolism and inflammation response.

Objective:To explore the influence of online and offline family therapy based on the Satir model on emotions of adolescents with depressive disorder and their parents in remote areas.Methods:A total of 98 cases adolescents with depressive disorder treated in the psychosomatic medicine of the Second Affiliated Hospital of Nanchang University from January 2021 to June 2021 and their parents were selected as the objects. The adolescents with depressive disorder and their parents were randomly divided into the control group (49 parents and 49 adolescents) and the observation group (49 parents and 49 adolescents). The control group received the medical treatment (sertraline 100 mg/d) and the routine health education, while the observation group received the online and offline Satir family therapy on the basis of the intervention of the control group. Generalized anxiety disorder-7 (GAD-7) and patient health questionnaire-9 (PHQ-9) were used to investigate the negative emotions of the parents of the two groups before and 12 weeks after the intervention. The screen for child anxiety related emotional disorders (SCARED) and depression self-rating scale for childhood (DSRS) were used to investigate the negative emotions of the adolescents before and 12 weeks after the intervention.The SPSS 20.0 software was used for statistical analysis. t test was used to compare the SCARED scale score and DSRS score changes of the adolescents in the two groups, and χ 2 test was used to compare the proportional changes of parents' anxiety and depression. Results:The scores of SCARED (51.55±12.69 vs 36.82±7.69, t=15.839) and DSRS (25.08±4.81 vs 16.88±2.16, t=13.047) of adolescents in the control group were significantly different before and after the intervention (both P<0.05). The scores of SCARED (51.16±15.84 vs 31.31±7.72, t=14.385) and DSRS (24.12±4.81 vs 14.08±2.03, t=14.723) of adolescents in the observation group were significantly different before and after the intervention (both P<0.05). After the intervention, the scores of SCARED and DSRS in the observation group were lower than those in the control group ( t=3.540, 6.609, both P<0.05). Before intervention, there was no significant difference in the proportion of anxiety and depression between the parents of the two groups (χ 2=1.837, 3.547, both P>0.05). After 12 weeks of intervention, there was a statistically significant difference in the proportion of anxiety and depression between the two groups, which were lower in the observation group than those in the control group (χ 2=5.995, 4.009, both P<0.05). Conclusion:Online + offline family therapy based on the Satir model can not only effectively reduce anxiety and depression of adolescents, but also effectively reduce anxiety and depression of their parents.It is especially suitable for outpatient management of children with depressive disorder in remote areas.

Objective:To investigate the current status of endoscopic treatment for gastroesophageal varices in portal hypertension in China, and to provide supporting data and reference for the development of endoscopic treatment.Methods:In this study, initiated by the Liver Health Consortium in China (CHESS), a questionnaire was designed and distributed online to investigate the basic condition of endoscopic treatment for gastroesophageal varices in portal hypertension in 2022 in China. Questions included annual number and indication of endoscopic procedures, adherence to guideline for preventing esophagogastric variceal bleeding (EGVB), management and timing of emergent EGVB, management of gastric and isolated varices, and improvement of endoscopic treatment. Proportions of hospitals concerning therapeutic choices to all participant hospitals were calculated. Guideline adherence between secondary and tertiary hospitals were compared by using Chi-square test.Results:A total of 836 hospitals from 31 provinces (anotomous regions and municipalities) participated in the survey. According to the survey, the control of acute EGVB (49.3%, 412/836) and the prevention of recurrent bleeding (38.3%, 320/836) were major indications of endoscopic treatment. For primary [non-selective β-blocker (NSBB) or endoscopic therapies] and secondary prophylaxis (NSBB and endoscopic therapies) of EGVB, adherence to domestic guideline was 72.5% (606/836) and 39.2% (328/836), respectively. There were significant differences in the adherence between secondary and tertiary hospitals in primary prophylaxis of EGVB [71.0% (495/697) VS 79.9% (111/139), χ2=4.11, P=0.033] and secondary prophylaxis of EGVB [41.6% (290/697) VS 27.3% (38/139), χ2=9.31, P=0.002]. A total of 78.2% (654/836) hospitals preferred endoscopic therapies treating acute EGVB, and endoscopic therapy was more likely to be the first choice for treating acute EGVB in tertiary hospitals (82.6%, 576/697) than secondary hospitals [56.1% (78/139), χ2=46.33, P<0.001]. The optimal timing was usually within 12 hours (48.5%, 317/654) and 12-24 hours (36.9%, 241/654) after the bleeding. Regarding the management of gastroesophageal varices type 2 and isolated gastric varices type 1, most hospitals used cyanoacrylate injection in combination with sclerotherapy [48.2% (403/836) and 29.9% (250/836), respectively], but substantial proportions of hospitals preferred clip-assisted therapies [12.4% (104/836) and 26.4% (221/836), respectively]. Improving the skills of endoscopic doctors (84.2%, 704/836), and enhancing the precision of pre-procedure evaluation and quality of multidisciplinary team (78.9%, 660/836) were considered urgent needs in the development of endoscopic treatment. Conclusion:A variety of endoscopic treatments for gastroesophageal varices in portal hypertension are implemented nationwide. Participant hospitals are active to perform emergent endoscopy for acute EGVB, but are inadequate in following recommendations regarding primary and secondary prophylaxis of EGVB. Moreover, the selection of endoscopic procedures for gastric varices differs greatly among hospitals.

Objective To investigate the effect of T cell immunoreceptor with Ig and ITIM domains (TIGIT) on the function of CD8⁺ T cells in the lungs of Plasmodium infected mice. Methods The lungs of the mice infected with Plasmodium yoelii were isolated, weighed and photographed after 12 days' infection. After dissolution, lung lymphocytes were isolated, counted and stained, and then the contents of CD8⁺ and TIGIT⁺CD8⁺ T cells were detected by flow cytometry. The expressions of L selectin (CD62L), CD69, programmed death 1 (PD-1), CD25, and C-X3-C motif chemokine receptor 1 (CX3CR1) on TIGIT⁺CD8⁺ T cells were detected by flow cytometry. After stimulation with phorbol 12-myristate 13-acetate (PMA) and ionomycin, the ability of TIGIT⁺CD8⁺T cells to secrete interferon γ(IFN-γ), interleukin 21 (IL-21), IL-4, IL-17, and IL-10 was detected. Results The body mass of mice with Plasmodium infection was reduced. The lungs became darker, and the ratio of the lung mass to body mass was significantly increased. Compared with the normal mice, the percentages and absolute quantity of CD8⁺ and TIGIT⁺CD8⁺ T cells in the lungs of the infected mice were significantly increased. The percentage of TIGIT⁺CD8⁺ T cells expressing CD62L in the infected group was significantly lower, while the percentage of the CD69, PD-1, and CX3CR1 cells were significantly higher than that of TIGIT⁺CD8⁺ T cells from the normal mice. The percentages of TIGIT⁺CD8⁺ T cells secreting IL-21, IL-4, IL-17 and IL-10 cells in the infected group were significantly lower. Conclusion The lung lesions from mice with Plasmodium infection are obvious, the numbers of TIGIT⁺CD8⁺ T cells increase, and these cells express a variety of activation-related molecules, but the ability to secrete cytokines is reduced.
Animals ; Mice ; CD8-Positive T-Lymphocytes ; Cytokines/metabolism* ; Interferon-gamma/metabolism* ; Interleukin-10/metabolism* ; Interleukin-17/metabolism* ; Interleukin-4/metabolism* ; Lung/metabolism* ; Malaria/metabolism* ; Plasmodium yoelii/metabolism* ; Programmed Cell Death 1 Receptor/metabolism*