AIM: To study the apoptosis induction of cyclooxygenase - 2 ( COX - 2) inhibitor, celecoxib and adriamycin (ADM) on tumor apoptosis of gastric carcinoma MGC - 803 cells, and to explore their possible molecular mechanism(s) and interactions. METHODS: The number of MGC - 803 cells was observed by MTT assay. Tumor apoptosis was studied by fluorescence microscopy, flow cytometry (FCM), and DNA ladder. RESULTS: MGC -803 cell number was significantly decreased with increasing dose of ADM. Cells were accumulated in G0/G1 phase and the number of cells in S phase was decreased. ADM (5 mg/L) combined with celecoxib (25 μmol/L) markably inhibited the growth of MGC - 803 cells. Significant morphological changes of typical apoptosis were observed after treatment with combined use of celecoxib and ADM. Compared with ADM or celecoxib alone, ADM plus celecoxib obviously enhanced the DNA ladder fragment revealed by agarose gel electrophoresis of DNA. After exposure to combined celecoxib and ADM treatment for 48 h, MGC - 803 cells were accumulated in G0/G1 phase. There was a decrease in the number of cells in S phase as compared to celecoxib or ADM alone. CONCLUSION: Celecoxib and ADM appear to have synergistic effects for the apoptosis induction. This may be an important prospect for applying COX - 2 inhibitors to assist chemical therapy of ADM in clinical use.

Objective To improve the early diagnosis and prognosis factor of pancreatic carcinoma by summarizing and analyzing the clinical data. Methods The clinical data of 90 patients with pancreatic carcinoma of our hospital from 1989 to 2005 were analyzed retrospectively. Results The symptoms of pancreatic carcinoma were very complicated,the most common manifestations were bellyache,jaundice and weight loss. Main physical signs in these patients included abdominal tenderness,abdominal mass,hepatomegalia,gallbladder enlargement. Jaundice was the outstanding manifestation of pancreatic head cancer. Among all patients,16 cases accepted sugical resection(17.8%),and the 1-year,3-year,5-year survival rate were 22. 2%,11.1% and 2. 2% respectively. Our data showed that the most important prognostic factors which influenced life span were the surgical procedures,tumor size and location,histological differentiation,TNM stage. Conclusions Clinical manifestations of pancreatic carcinoma are related to TNM stage,tumor size and location,histology type,complication disease. Clinical symptoms only provide clue for diagnosis of pancreatic carcinoma. Laboratory and imaging examination will provide objective evidence for further diagnosis and prognosis in pancreatic carcinoma.

Objective To discuss the clinical value of new- utility anal vacuum tube in preventing anastomotic fistula after colorectal cancer anterior resection. Methods Ninety-six patients having underwent the colorectal cancer anterior resection were divided into new-utility anal vacuum tube group and normal anal vacuum tube group by random digits table method with 48 cases each. The complication, anus exhaust time and postoperative drainage volume were compared between 2 groups. Results The incidences of tube defluxion, proctalgia, anus skin damage, bed sheet pollution and anastomotic fistula in new-utility anal vacuum tube group were significantly lower than those in normal anal vacuum tube group: 6.25% (3/48) vs. 31.25% (15/48), 10.42% (5/48) vs. 41.67% (20/48), 0 vs. 25.00%(12/48), 6.25%(3/48) vs. 60.42%(29/48), 2.08%(1/48) vs. 12.50%(6/48), the anus exhaust time was significantly shorter than that in normal anal vacuum tube group:(44.1 ± 8.9) h vs. (48.9 ± 9.6) h, the postoperative drainage volumes form the first day to fifth day were significantly more than those in normal anal vacuum tube group: (31.2 ± 15.1) ml vs. (15.6 ± 8.2) ml, (25.3 ± 13.2) ml vs. (15.8 ± 6.5) ml, (15.6 ± 9.1) ml vs. (10.3 ± 4.5) ml, (104.3 ± 38.2) ml vs. (90.6 ± 12.3) ml and (93.7 ± 32.5) ml vs. (80.7 ± 18.9) ml, and there were statistical differences (P<0.01 or <0.05). The patients in new-utility anal vacuum tube group had different symptoms, but patients could tolerate. Conclusions The new-utility anal vacuum tube can reduce the incidence of anastomotic fistula, and be safe and reliable, which is worthy of wide application.

Objective To discover,diagnose and treat colorectal cancer in the early period and further improve the survival rate,reduce morbidity and mortality of the colorectal cancer by early screening for colorectal cancer in Jinjiang.Methods According to “The Guide of Cancer Screening and Early Diagnosis and Treatment in China by the Experts Group of Ministry of Health”,the case history was collected while the stool occult blood and FOBT were detected to discover high risk crowd who then inspected by electron enterscope.Results The screening was practiced in Xibin,Zimao and Neikeng town respectively.The crowd of 40-74 years old was 10 116 and 2631 of them accepted screening(acclimation rate,26％).Two hundred and fifty-seven high-risk people were discovered(9.8％ of 2631)and 86 of them(acclimation rate,33％,86/257)were inspected by electron enterscope.Twenty-two cases were detected with colorectal affection(detection rate,8.6％,22/257),20 cases were diagnosed as colorectal adenoma and 2 cases were diagnosed as adenocarcinoma by pathological section.All of them accepted therapy.Conclusion Carrying out early screening for colorectal cancer is important.It can reduce morbidity and mortality of the colorectal cancer and then improve the cure rate and prolong survival in patients with colorectal cancer.

Methods: The median sagittal diameter and transverse diameter of the spinal canal from C2 to C7 were measured on CT images. The ratio of the median sagittal diameter to the transverse diameter was calculated. Accordingly, the spinal canal shape of each segment was classified into four, and the specific criteria of lunar phase classification were determined through linear discriminant analysis based on the ratio of the median sagittal diameter to the transverse diameter. The inter-rater reliability of the classification was explored using Kappa coefficients. Finally, the morphology of the different segments of the cervical spinal canal in healthy volunteers was revised and compared. Results: According to the ratio of the median sagittal diameter and the transverse diameter of the cervical spinal canal, the lunar phase classification of the cervical bony spinal canal was determined as follows: full-moon >0.65, 0.55< convex-moon ≤0.65, 0.46≤ quarter-moon ≤0.55, and residual-moon <0.46. The Kappa values of C2–C7 were 0.851, 0.958, 0.823, 0.927, 0.793, and 0.946, and the Kappa value of all C2–C7 segments was 0.854 that mainly presented two forms of full-moon (76.5%) and convex-moon (23.0%). A quarter-moon spinal canal was mainly distributed in C3, C4, C5, and C6; a residual-moon spinal canal was mainly distributed in C4 and C5; and the morphological distribution of C4 and C5 were similar (p>0.05). The frequency of the spinal canal of the residual-moon type was the highest, and the full-moon (6.5%) and residual-moon (7.5%) types of C7 were rare. Conclusions The morphological classification of the cervical spinal canal was established to present anatomical variations. The classification showed good inter-rater reliability.

The Chinese space station will be built around 2020. As a national space laboratory, it will offer unique opportunities for studying the physiological effects of weightlessness and the efficacy of the countermeasures against such effects. In this paper, we described the development of countermeasure systems in the Chinese space program. To emphasize the need of the Chinese space program to implement its own program for developing countermeasures, we reviewed the literature on the negative physiological effects of weightlessness, the challenges of completing missions, the development of countermeasure devices, the establishment of countermeasure programs, and the efficacy of the countermeasure techniques in American and Russian manned spaceflights. In addition, a brief overview was provided on the Chinese research and development on countermeasures to discuss the current status and goals of the development of countermeasures against physiological problems associated with weightlessness.
China ; Humans ; Program Evaluation ; Space Flight ; Weightlessness ; Weightlessness Simulation

To unravel the genetic mechanisms of disease and physiological traits, it requires comprehensive sequencing analysis of large sample size in Chinese populations. Here, we report the primary results of the Chinese Academy of Sciences Precision Medicine Initiative (CASPMI) project launched by the Chinese Academy of Sciences, including the de novo assembly of a northern Han reference genome (NH1.0) and whole genome analyses of 597 healthy people coming from most areas in China. Given the two existing reference genomes for Han Chinese (YH and HX1) were both from the south, we constructed NH1.0, a new reference genome from a northern individual, by combining the sequencing strategies of PacBio, 10× Genomics, and Bionano mapping. Using this integrated approach, we obtained an N50 scaffold size of 46.63 Mb for the NH1.0 genome and performed a comparative genome analysis of NH1.0 with YH and HX1. In order to generate a genomic variation map of Chinese populations, we performed the whole-genome sequencing of 597 participants and identified 24.85 million (M) single nucleotide variants (SNVs), 3.85 M small indels, and 106,382 structural variations. In the association analysis with collected phenotypes, we found that the T allele of rs1549293 in KAT8 significantly correlated with the waist circumference in northern Han males. Moreover, significant genetic diversity in MTHFR, TCN2, FADS1, and FADS2, which associate with circulating folate, vitamin B12, or lipid metabolism, was observed between northerners and southerners. Especially, for the homocysteine-increasing allele of rs1801133 (MTHFR 677T), we hypothesize that there exists a "comfort" zone for a high frequency of 677T between latitudes of 35-45 degree North. Taken together, our results provide a high-quality northern Han reference genome and novel population-specific data sets of genetic variants for use in the personalized and precision medicine.