Objective : To investigate the expression of N6-methyladenosine modification ( m6 A) and related en- zymes FTO，METTL3 and YTHDF2 in gastric epithelial cells infected with Helicobacter pylori (Hp) ，and to analyze its expression and clinical significance in gastric cancer by using online websites． Methods : Gastric epithelial cells GES-1 and AGS were infected with Hp GZ7 strain，and the multiplicity of infection was 30 ∶ 1．Total RNA and total protein were collected after infecting 24 h，and the m6 A modification level of total RNA was detected by RNA dot hybridization．The mRNA and protein expressions of FTO ，METTL3 and YTHDF2 were detected by q-PCR and Western blot．The expression difference of FTO，METTL3 and YTHDF2 in gastric cancer tissues and normal tissues and their expression in Stage classification were analyzed by GEPIA，and the relationship between the expression of FTO，METTL3 and YTHDF2 and prognosis was analyzed by Kaplan-Meier Plotter. Results : Compared with the un- infected group，the m6 A modification level of total RNA in both Hp-infected GES-1 and AGS cells significantly de- creased，the mRNA and protein expression levels of FTO increased，and the mRNA and protein levels of METTL3 and YTHDF2 decreased，with statistical significance (P＜0. 05) ．The expression level of FTO in gastric cancer tis- sues was higher than that in normal tissues，with statistical significance (P＜0. 05) ，YTHDF2 was higher than that in normal tissues，with no statistical significance，and the expression level of METTL3 was lower than that in nor- mal tissues，with no statistical significance．Patients with high expression of FTO and METTL3 had a lower survival rate，while patients with high expression of YTHDF2 had a higher survival rate．The expression of FTO was signifi- cantly correlated with Stage classification (P＜0. 05) ，while the expression of METTL3 and YTHDF2 was not sig- nificantly correlated with Stage classification． Conclusion Hp infection can change the level of m6 A and the ex- pression of related enzymes FTO，YTHDF2 and METTL3，suggesting that m6 A methylation may play a role in the occurrence and development of Hp-induced gastric cancer.

Objective: To investigate the relationship between childhood abuse and recent negative life events with suicidal ideation and attempt, and to provide reference for prevention and control of suicidal behaviors in middle school students. Methods: Stratified cluster sampling method was used to select 7 986 middle school students from Shenzhen, Nanchang and Shenyang as participants. Questionnaire survey was conducted to collect information on demographic indicators, childhood abuse, negative life events, suicidal ideation and suicide attempt, etc. Logistic regression was used to analyze the relationship between childhood abuse experience and negative life events with suicidal ideation and suicide attempt. Results: The prevalence of suicidal ideation and suicide attempt was 22.9% and 4.7%. After adjusted for confounding variables, with the increase of childhood abuse and negative life events, suicidal ideation and attempt in middle school students showed an increasing trend(P<0.05). Compared those with low level of childhood abuse and negative life events, students with high childhood abuse and high negative life events had a higher suicidal ideation and suicide attempt risk, the multiple adjusted odds ratio was 10.43 and 19.75(P<0.05). Conclusion Childhood abuse and negative life events are important risk factors affecting suicidal ideation and attempt in middle school students. Strategies to reduce childhood abuse and negative life events should be an integral component of targeted mental health interventions.

OBJECTIVE: To study the anti- fibrotic effect of human umbilical cord mesenchymal stem cell-derived exosomes (hUCMSC-EXOs) and explore the mechanism. METHODS: Twenty-four C57 BL/6 mice were divided into 4 groups (=6), including the control group treated with intratracheal injection of saline (3 mg/kg); lung fibrosis model group with intratracheal injection of 1.5 mg/mL bleomycin solution (prepared with saline, 3 mg/kg); EXOs1 group with intratracheal injection of 1.5 mg/mL bleomycin solution (3 mg/kg) and hUCMSC-EXOs (100 μg/250 μL, given by tail vein injection on the next day after modeling); and EXOs2 group with intratracheal injection of 1.5 mg/mL bleomycin solution (3 mg/kg) and hUCMSC-EXOs (100 μg/250 μL, given by tail vein injection on the 10th day after modeling). At 21 days after modeling, pulmonary index, lung tissue pathology and collagen deposition in the mice were assessed using HE staining and Masson staining. The expression level of TGF-β1 was detected using ELISA, and vimentin, E-cadherin and phosphorylated Smad2/3 (p-Smad2/3) were detected using immunohistochemical staining. CCK8 assay was used to evaluate the effect of hUCMSCEXOs on the viability of A549 cells, and Western blotting was used to detect the expression levels of p-Smad2/3, vimentin, and E-cadherin in the cells. RESULTS: Compared with those in the model group, the mice treated with hUCMSC-EXOs showed significantly reduced the pulmonary index ( < 0.05), collagen deposition, lung tissue pathologies, lowered expressions of TGF-β1 ( < 0.05), vimentin, and p-Smad2/3 and increased expression of E-cadherin. hUCMSC-EXOs given on the second day produced more pronounced effect than that given on the 11th day ( < 0.05). CCK8 assay results showed that hUCMSC-EXOs had no toxic effects on A549 cells ( > 0.05). Western blotting results showed that hUCMSC-EXOs treatment significantly increased the expression of E-cadherin and decreased the expressions of p-Smad2/3 and vimentin in the cells. CONCLUSIONS hUCMSC-EXOs can alleviate pulmonary fibrosis in mice by inhibiting epithelialmesenchymal transition activated by the TGF-β1/Smad2/3 signaling pathway, and the inhibitory effect is more obvious when it is administered on the second day after modeling.
Animals ; Epithelial-Mesenchymal Transition ; Exosomes ; Gene Expression Profiling ; Gene Expression Regulation ; Humans ; Mesenchymal Stem Cells ; cytology ; Mice ; Pulmonary Fibrosis ; therapy ; Transforming Growth Factor beta1 ; genetics ; Umbilical Cord ; cytology

OBJECTIVE: To study the anti- fibrotic effect of human umbilical cord mesenchymal stem cell-derived exosomes (hUCMSC-EXOs) and explore the mechanism. METHODS: Twenty-four C57 BL/6 mice were divided into 4 groups (=6), including the control group treated with intratracheal injection of saline (3 mg/kg); lung fibrosis model group with intratracheal injection of 1.5 mg/mL bleomycin solution (prepared with saline, 3 mg/kg); EXOs1 group with intratracheal injection of 1.5 mg/mL bleomycin solution (3 mg/kg) and hUCMSC-EXOs (100 μg/250 μL, given by tail vein injection on the next day after modeling); and EXOs2 group with intratracheal injection of 1.5 mg/mL bleomycin solution (3 mg/kg) and hUCMSC-EXOs (100 μg/250 μL, given by tail vein injection on the 10th day after modeling). At 21 days after modeling, pulmonary index, lung tissue pathology and collagen deposition in the mice were assessed using HE staining and Masson staining. The expression level of TGF-β1 was detected using ELISA, and vimentin, E-cadherin and phosphorylated Smad2/3 (p-Smad2/3) were detected using immunohistochemical staining. CCK8 assay was used to evaluate the effect of hUCMSCEXOs on the viability of A549 cells, and Western blotting was used to detect the expression levels of p-Smad2/3, vimentin, and E-cadherin in the cells. RESULTS: Compared with those in the model group, the mice treated with hUCMSC-EXOs showed significantly reduced the pulmonary index ( < 0.05), collagen deposition, lung tissue pathologies, lowered expressions of TGF-β1 ( < 0.05), vimentin, and p-Smad2/3 and increased expression of E-cadherin. hUCMSC-EXOs given on the second day produced more pronounced effect than that given on the 11th day ( < 0.05). CCK8 assay results showed that hUCMSC-EXOs had no toxic effects on A549 cells ( > 0.05). Western blotting results showed that hUCMSC-EXOs treatment significantly increased the expression of E-cadherin and decreased the expressions of p-Smad2/3 and vimentin in the cells. CONCLUSIONS hUCMSC-EXOs can alleviate pulmonary fibrosis in mice by inhibiting epithelialmesenchymal transition activated by the TGF-β1/Smad2/3 signaling pathway, and the inhibitory effect is more obvious when it is administered on the second day after modeling.
Animals ; Epithelial-Mesenchymal Transition ; Exosomes ; Humans ; Mesenchymal Stem Cells ; Mice ; Pulmonary Fibrosis ; Transforming Growth Factor beta1 ; Umbilical Cord

OBJECTIVE: To assess the value of BACs-on-Beads (BoBs) technique for the detection of chromosomal abnormalities in abortus tissues from recurrent pregnancy loss. METHODS: A total of 109 abortus samples were collected and analyzed with the BoBs technique. The incidence and types of chromosomal abnormalities for different age groups and gestational weeks were compared. RESULTS: The BoBs assay has succeeded in all cases, with an incidence for chromosomal abnormalities reaching 62.39% (68/109). The major findings included trisomy 16 (12/68), trisomy 22 (9/68), trisomy 13 (9/68) and trisomy 21 (8/68). The abnormal rate was significantly higher in those above 35-year-old compared with that of the <35-year-old group (P<0.05). More aberrations were found among abortus tissues derived from 42-70 days of pregnancy albeit with no statistical significance (P>0.05). The aberration rates were similar for samples derived from second, third and fourth time abortions (P>0.05). CONCLUSION BoBs technique can detect chromosomal aberrations in miscarriages and may be routinely used for the analysis of early spontaneous abortions.
Abortion, Habitual ; Abortion, Spontaneous ; Adult ; Chromosome Disorders ; Down Syndrome ; Female ; Humans ; Karyotyping ; Pregnancy ; Prenatal Diagnosis

Objective To explore whether augmenter of liver regeneration (ALR) can serve as early diagnostic biomarker in the patients with acute kidney injury(AKI).Methods The inpatients with possibility to AKI in the central ICU of Second Affiliated Hospital of Chongqing Medical University from October 2014 to October 2015 were recruited and assigned to the AKI group and non-AKI group according to the KDIGO guidance.Blood and urine ALR and blood creatinine were detected at 0,6,12,24,48,72 h after entering the group.Results Among all cases,40 cases(62.5％) developed to AKI.Blood ALR and urine ALR at 6h after entering the group in the AKI group began to significantly increase compared with the non-AKI group(P＜0.05),the blood and urine ALR levels reached to the peak value at 12,24 h after entering the group;the blood creatinine level at 12 h after entering the group in the AKI group began to significantly increase compared with the non-AKI group(P＜0.05),blood creatinine level was still slowly and progressively elevated at 72 h after entering the group.Conclusion Serum and urine ALR levels are significantly increased in the early stage of AKI,which indicates that ALR may be a new type biomarker for diagnosing AKI.

Objective: To study the correlation between the level of serum Chitinase-3-like protein 1 (CHI3L1) and the significant liver fibrosis and liver cirrhosis in patients with chronic liver disease, and to evaluate its diagnostic value. Methods: 165 patients with chronic liver disease were selected, liver histopathological examination was performed to detect serum CHI3L1 concentration. Four indexes of hepatic fibrosis (type III procollagen, collagen IV, laminin, hyaluronic acid), aspartate aminotransferase/platelet ratio index (APRI) and FIB-4 (fibrosis- 4) scores were based on the pathological findings of liver biopsy and compared the advantages and disadvantages of serum CHI3L1 with other methods for the diagnosis of hepatic fibrosis and liver cirrhosis. A multivariate regression analysis model was created, and receiver operating characteristic curve was analyzed. Results: The level of serum CHI3L1 increased with increase of fibrosis stage and was highest in liver cirrhosis stage. In the period of S0 to 1, the levels of S2 to 3 and S4 were 62.82 (41.40 ~ 87.20), 70.94 (48.47 to 122.60) and 141.06 (78.18 ~ 197.40), and there were statistically significant differences between the groups (P < 0.001). The area under the curve for the diagnosis of significant liver fibrosis was 0.68 (0.60 to 0.77), and 0.74 (0.65 to 0.83) for cirrhosis in CHI3L1. Multivariate regression analysis showed that CHI3L1 was an independent predictor of significant fibrosis and cirrhosis. The combined diagnostic model based on CHI3L1, collagen IV and FIB-4 scores further improved the diagnostic value. The area under the curve for the diagnosis of significant fibrosis and cirrhosis was 0.79 (0.72 to 0.86) and 0.80 (0.73 to 0.87), respectively. Conclusion CHI3L1 has a good diagnostic value in patients with chronic liver disease with significant fibrosis and liver cirrhosis. The diagnostic model in combination with other markers like Collagen IV and FIB-4 scores could further improve the diagnostic value and is worthy of further study.

Objective To compare the surgical effect of gasless endoscopic thyroidectomy and CO2- insufflation endoscopic thyroidectomy, and evaluate the safety and applicability of gasless endoscopic thyroidectomy. Methods A prospective randomized controlled study was carried out.Sixty patients who were scheduled for bilateral thyroid surgery under endoscope were divided into 2 groups by sortition method: gasless group (30 patients, treated with gasless endoscopic thyroidectomy) and CO2-insufflation group (30 patients, treated with CO2-insufflation endoscopic thyroidectomy). The data of arterial partial pressure of carbon dioxide (PaCO2) and pH value before operation and 60 min after operation were detected. The operation time, intraoperative bleeding, time of putting the drain, hospitalization time after operation and postoperative complications were recorded. Results All the 60 patients completed endoscopic surgery,and no case was converted to the conventional procedure.There were no statistical differences in PaCO2and pH value before operation between 2 groups(P>0.05).The PaCO260 min after beginning of operation in gasless group was significantly lower than that in CO2-insufflation group:(36.43 ± 1.98)mmHg(1 mmHg=0.133 kPa)vs.(37.93 ± 3.27)mmHg,the pH value 60 min after beginning of operation was significantly higher than that in CO2-insufflation group:7.42 ± 0.02 vs. 7.37 ± 0.01, and there were statistical differences (P<0.05 or <0.01). There were no statistical difference in operation time, intraoperative bleeding, time of putting the drain, hospitalization time after operation and incidence of hoarseness between 2 groups (P>0.05). There were no complications related with trachea, parathyroid gland and superior laryngeal nerve in 2 groups. The incidence of CO2retention related complications in gasless group was significantly lower than that in CO2-insufflation group: 6.7% (2/30) vs. 43.3% (13/30), and there was statistical difference (P<0.01). Conclusions The modified spring suspension gasless endoscopic thyroidectomy not only acquires the equivalent surgical effect and indication,compared with the CO2-insufflation endoscopic surgery,but also is safer and has lower incidence rate of CO2retention related complications.

Objective To investigate the effect of local application of triamcinolone acetonide in promoting wound healing and recurrence after granulomatous lobular mastitis (GLM) operation. Methods The clinical data of 55 GLM patients with the diameter > 5 cm were retrospectively analyzed, and all patients treated with incision drainage to breast abscess and removal of inflammatory lesions. Thirty - one patients were treated with routine dressing change after operation (control group), and 24 patients were treated with routine dressing change and triamcinolone acetonide injection after operation (experiment group). The wound dressing time, recovery rate and recurrence rate were compared between 2 groups, and hormone related adverse reaction of experiment group was observed. Results The wound dressing time in experiment group was significantly shorter than that in control group:(58 ± 19) d vs. (71 ±25) d, and there was statistical difference (P<0.05). There were no statistical differences in the recovery rate and recurrence rate between experiment group and control group:91.7%(22/24) vs. 83.9%(26/31) and 9.1%(2/22) vs. 15.4% (4/26), P>0.05. The patients of experiment group did not have the hormone related adverse reaction. Conclusions The local application of triamcinolone acetonide after GLM operation can accelerate the wound healing, and it may also contribute to higher recovery rate and lower recurrence rate.

Objective To construct the permanent colostomy patients with rectal cancer in archives information module content. Methods Using expert meeting,semi- structured interview, literature review, Delphi expert consultation method, establish the system of permanent rectal cancer patients file information specific module. Results In two- round consultation authority coefficient was 0.847. Kendall coordination coefficient (Kendall′s W) was 0.195-0.331, the difference had statistical significance (P<0.01); through the expert consultation method to construct the file information module for permanent colostomy patients with rectal cancer, which contained 4 first-level indicators (colostomy patient information module, stoma nursing modules, stoma patients transitional care modules, colostomy patients with network platform module), 11 secondary indicators, 36 third grade indicators. Conclusions This study established file information module content for permanent stoma patients with rectal cancer. It has good scientificity and reliability, and can provide a theoretical basis for the clinical development of a file information system network for transitional care of permanent stoma patients with rectal cancer.