Objective To explore the effectiveness of an integrated laparoscopic simulation training course (best essential surgical technique training, BEST) in enhancing laparoscopic peritoneal suturing techniques in surgical residents.Methods As an integrated two-stage program, the BEST course applied basic laparoscopic training system with simple molds in phase Ⅰ training, and then adopted advanced laparoscopic training system, 3D Laparoscope and ex-vivo animal models in phase Ⅱ training. The laparoscopic suturing techniques were practiced in phase Ⅱ training. From August 2021 to July 2024, surgical residents in the second year of the national standardized training program were divided into pilot and control groups based on whether they had undergone the BEST course. Two cases of laparoscopic peritoneal suture were performed by the surgical residents under supervision in the department of gastrointestinal surgery. The operative time, quality of suture, and independent completion rate were compared between the two groups.Results A total of 33 surgical residents (19 in pilot group and 14 in control group) were included in this study, and a total of 66 cases of laparoscopic peritoneal suture were performed (38 in pilot group and 28 in control group). The operative time was significantly shorter in pilot group than that in control group (15.7 min vs. 17.5 min, P=0.025). The quality of suture was significantly better in pilot group compared to control group (P=0.023). In pilot group, all peritoneal sutures were performed by residents independently, whereas in control group, 3 cases (10.7%) were assisted by the supervisor, and the independent completion rate was different significantly (P=0.039).Conclusions The BEST course can help improve surgical residents′ laparoscopic peritoneal suturing techniques and could be promoted in the national standardized training program for surgical residents.

Objective To explore the expression levels of YBX1 and FOXA1 in gastric cancer tissues and determine their relationship with prognosis. Methods A total of 131 patients with gastric cancer were studied, and the corresponding adjacent normal tissues of each patient were selected as the control. qRT-PCR and immunohistochemistry were used to detect the expression levels of YBX1 and FOXA1 in cancer tissues and adjacent tissues. The correlation between YBX1 and FOXA1 protein expression in gastric cancer tissues was expressed by Crammer's V coefficient, and the correlation between YBX1 mRNA and FOXA1 mRNA was analyzed by Pearson method. Kaplan-Meier method was used to analyze the relationship between YBX1, FOXA1 protein expression in gastric cancer tissues and the 5-year overall survival rate of patients. Univariate and multivariate Cox regression analyses were used to analyze the factors affecting the prognosis of patients with gastric cancer. Results Compared with paracancerous tissue, the levels of FOXA1 and YBX1 in cancer tissues were lower and higher, respectively (P < 0.05). A negative correlation was observed between YBX1 mRNA and FOXA1 mRNA in gastric cancer (r=-0.675, P < 0.05). The expression of YBX1 and FOXA1 proteins in gastric cancer tissues was negatively correlated (Crammer's V=-0.497, P < 0.001). The expression of YBX1 and FOXA1 proteins in gastric cancer tissue was related to the degree of differentiation, lymph node metastasis, and TNM staging (P < 0.05). The 5-year survival rate of the YBX1 negative expression group and the FOXA1 positive expression group were higher than those of the YBX1 positive expression group, and the FOXA1 negative expression group both P < 0.05). TNM staging and YBX1 were independent risk factors for death in patients with gastric cancer (P < 0.05), and FOXA1 was a protective factor (P < 0.05). Conclusion YBX1 is highly expressed and FOXA1 is lowly expressed in gastric cancer tissues; they are closely related to the disease progression and prognosis of patients with gastric cancer.

OBJECTIVETo compare the distribution of (CAG)n and (GGN)n repeats polymorphisms of androgen receptor (AR) gene between Hui and Han ethnic Chinese from Ningxia.

METHODSGenotypes of above repeats were determined with DNA sequencing method.

RESULTSThe distribution of (GGN)n repeats was significantly different between the two ethnic groups (P< 0.01), though no such difference was detected with (CAG)n repeats (P> 0.05). Particularly, Han Chinese women carrying 23 GGN repeats were significantly fewer (48.4%) than Hui women (64.7%, P=0.01).

CONCLUSIONThe distribution of GGN repeat is significantly differently among Hui and Han Chinese ethnics from Ningxia.

Alleles ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; China ; ethnology ; Female ; Genotype ; Humans ; Male ; Molecular Sequence Data ; Polymorphism, Genetic ; Population Groups ; genetics ; Receptors, Androgen ; genetics ; Trinucleotide Repeat Expansion ; Trinucleotide Repeats

Objective Within human hepatoma cell lines,we aimed to investigate the effects of the down-regulation by RNAi on different fragments of osteopontin (OPN) in order to discover more effective and accurate sites for OPN.Methods Specific small interfering RNA of OPN (OPNi-1) were synthesized and transfected into human hepatoma cell line (HEP-G2).Fluorescent quantitative PCR and immunohistochemical methods were used to test*the OPN expression levels of mRNA and protein before and after RNAi.Results After transfection,the △CT value of the A fragment was greater than B and C fragments of OPN mRNA in HEP-G2.Before RNAi was added to HEP-G2 cells,the three fragments A,B,C had OPN mRNA CT values of 8.31±1.58,8.78±1.49,8.25±1.51 respectively.Once the RNAi were added,the CT values were measured 48h after for the fragments A,B,and C which were 12.14±1.43,10.22±1.97,10.48±1.88 (P＜0.05) respectively.The immunohis tochemical values of A,B,C were down from 6.44±1.67,5.43±2.05,5.45±2.52 to 2.84±1.52,4.43± 1.65,3.95± 1.43 respectively after interference.Conclusions RNAi can inhibit the expression of OPN gene selectively.siRNA targets different segments of OPN,which may have more effects on invasion and metastasis of liver cancer for a more important significance in science and health economics.