Search

Objective: To construct a MYH9 gene knockout model in MGC803 cell line using transcription activator-like effector nuclease (TALEN) and observe its effect on cell cycle and apoptosis., Methods: According to FastTALE(TM) TALEN Kit, we designed TALEN pairs and constructed the plasmids targeting to MYH9 gene. After detecting their activity in MGC803 cells by plasmid transfection, DNA sequencing, RT-PCR and western blot, we selected the monoclonal cells and studied the changes in the cell cycle and apoptosis., Results: MYH9 gene could not be knocked out but knocked down in selected MGC803 monoclonal cells, which caused cell cycle arrested at G2/M phase (P<0.05) and a significant increase in the cell number with early apoptosis (P<0.01)., Conclusion: We successfully generated a MYH9 knockdown model in MGC803 cell lines by TALEN, which could be in favor of MYH9 function study in gastric cancer.

Objective: We report a case of rectum telangiectasia, a rare form of lower gastrointestinal hemorrhage caused by vascular malformation. The patient underwent laparoscopic assisted abdomino-perineal resection of the sigmoid colon-rectum telangiectasia. The extent and degree of pathological changes were observed directly from the intestinal wall during laparoscopic surgery, and after collection of biopsy evidence, concomitant definitive surgery was performed to achieve a minimally invasive effect.

Objective: To investigate the features of intraductal papilloma of the breast in mammography and magnetic resonance imaging (MRI) and assess the diagnostic values of the two imaging modalities., Methods: Fifteen patients with intraductal papilloma of the breast confirmed surgically and pathologically underwent X-ray examination of the breast, and 11 of them also received enhanced MRI. The imaging findings by mammography and MRI were compared., Results: Enhanced MRI clearly displayed the location and morphology of the intraductal papilloma, and 7 patients showed smooth tumor margins and 2 showed irregular margins. On T(1)WI, the lesions were isointense or slightly hypointense, and appeared isointense or slightly hyperintense on T(2)WI. Some of the intraductal papillomas were seen encapsulated in the dilated ductal. The varying enhancement features of the lesions increased the difficulty in distinguishing from carcinoma. Mammography identified intraductal papillomas only in 2 of the 15 cases (13%) with lesion feature similar to that found by MRI. Fine cluster calcification was found in 1 case., Conclusion: MRI can more accurately define the location of the lesion than X-ray. In spite of some resemblance in the MRI findings between intraductal papillomas and breast carcinoma, MRI still serves as a useful diagnostic modality for intraductal papilloma that shows some characteristic findings.

Objective: To observe the effect of laparoscopy-assisted and open distal gastrectomies on the perioperative levels of C-reactive protein (CRP) and visceral proteins in patients with gastric cancer., Methods: T Fifty-three patients with gastric cancer were randomized into two groups to receive laparoscopic surgery (n=26) or open surgery (n=27). The CRP levels were measured preoperatively and at 1, 2, 3 and 7 days after the operation. The levels of the visceral proteins including albumin (ALB), prealbumin (PRE), transferrin (TRF) and retinal-binding protein (RbP) were assayed before and at 3 and 7 days after the operation., Results: Compared with the preoperative levels, the CRP levels in both groups were significantly increased on days 1, 2, and 3 after the operation (P<0.05), with the highest level occurred on day 2 postoperatively. The postoperative CRP levels were significantly lower in the laparoscopic group than in the open surgery group (P<0.01). The levels of ALB, PRE, TRF, and RbP were significantly decreased after operation in both groups (P<0.01) without significant differences between the two groups (P>0.05)., Conclusion: Compared with open surgeries, laparoscopy-assisted distal gastrectomy for gastric cancer causes minimal surgical trauma and mild inflammatory responses to allow the recovery of the levels of the visceral proteins.

Objective: To evaluate the clinical effect of intraoperative and early postoperative continuous hyperthermic pertioneal perfusion chemotherapy (CHPPC) for gastric cancer., Methods: Eight-five patients with gastric cancer were randomized into therapeutic group with perioperative CHPPC combined with intravenous chemotherapy (n=44) and control group with intravenous chemotherapy only (n=41). The postoperative complications, adverse effects, local recurrence rates, distant metastasis rates, and 1- and 3-year survival rates were compared between two groups., Results: No significant differences were found in the postoperative complications and adverse effects between the two groups. The recurrence rate and distant metastasis rates in the therapeutic group were significantly lower than those in the control group (20.45% vs 43.90%, and 15.90% vs 39.02%, P<0.05). The 1- and 3-year survival rates in the therapeutic group were significantly higher than those in the control group (90.90% vs 78.05%, and 59.09% vs 34.15%, P<0.05)., Conclusion: Perioperative CHPPC for gastric cancer is safe and feasible, and can reduce the recurrence rate, distant metastasis rate and improve the survival for gastric cancer patient after operation.

Objective: To study the serum level of interleukin-17A (IL-17A) and its expressions in the lung, spleen and thymus in asthmatic mice., Methods: In 14 normal BALB/c female mice and 14 asthmatic mice, the changes in the airway pathology and the cell proportion in the bronchoalveolar lavage fluid (BALF) were observed. The serum level of IL-17A and IL-17A expressions in the tissue homogenates of the lung, spleen and thymus of the mice were detected by sandwich enzyme-linked immunosorbent assay (ELISA)., Results: The airway inflammation in the asthmatic mice was characterized mainly by eosinophil and neutrophil infiltration, which was not observed in the normal control group. Serum IL-17A levels and IL-17A expressions in the lung, spleen and thymus of the asthmatic mice were significantly higher than those in the normal control group (P<0.01). In the asthmatic mice, IL-17A expression in the lung tissues was positively correlated with the percentages of neutrophils (r=0.693, P=0.040) and eosinophils (r=0.733, P=0.030) in the BALF., Conclusion: IL-17A is highly expressed in the serum, lung, spleen and thymus of asthmatic mice. IL-17A may be one of the major cytokines involved in exacerbation of bronchial asthma, and is probably associated with the recruitment of neutrophils and eosinophils into the airways.