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Objective To investigate the influence of in vitro artificial CO 2 cavity on matrix metallopro-teinase 2(MMP-2), adhesion molecule vascular cell adhesion molecule 1(VCAM-1), and intercellular adhesion molecule 1(ICAM-1)expression in MDA-MB-231 cell.Methods An in vitro artificial CO2 cavity model was es-tablished.MDA-MB-231 cells were exposed to CO2 under the pressure of 7 mmHg for 1, 2 and 4 hours, respective-ly.MMP-2 concentration was measured by enzyme linked immunosorbent assay (ELISA).VCAM-1 and ICAM-1 ex-pression were measured by flow cytometry 0, 24, 48 and 72 hours after CO2-insufflation.Hypoxia group was ex-posed to 0 mmHg helium for 1 h, and the control group was exposed to 37℃incubator only .Results Compared with that in the control group , MMP-2 expression in the 1, 2 and 4 hours treatment group was significantly elevat-ed at 0 hour(F=15.045, P<0.05), and the MMP-2 expression in the 2 hours CO2 treatment group was signifi-cantly elevated after 24 hours compared with that in the control group and 1, and 4 hours CO2 treatment group (F=5.976, P<0.05).The VCAM-1 expression was significantly elevated at 0 hour and after 24 hours in the 1, 2 and 4 hours CO2 treatment group compared with that in the control group ( F1 =18.321, F2 =20.443, P<0.05), and significantly declined after 72 hours in the 4 hours CO2 treatment group compared with that in 1, and 2 hours CO2 treatment group(F=15.045,P<0.05).ICAM-1 expression was significantly elevated at 0 hour in hypoxia group and 1, 2, 4 hours CO2 treatment group compared with that in the control group , Meanwhile it was higher in 2 hours CO2 treatment group than in 1 hours and 4 hours CO2 treatment group(F=73.765, P<0.05). ICAM-1 expression was significantly elevated after 24 hours in 2 and 4 hours CO2 treatment group compared with that in the control group and 1 hour CO2 treatment group(F=46.322, P<0.05), and it was significantly elevat-ed after 48 hours in 2 hours CO2 treatment group compared with that in the control group and 1, and 4 hours CO2 treatment group(F=22.315, P<0.05).Conclusion The expression of MMP-2, adhesion molecule VCAM-1, and ICAM-1 in MDA-MB-231 cells is elevated after exposure to artificial 7 mmHg CO2 cavity, and CO2 cavity of mastoscopy may modulate the metastasis capacity of breast tumor cells .
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BACKGROUND:The metastatic potential of hepatocelular carcinoma cels is key factor influencing patient’s prognosis. To observe the effect of human bone marrow mesenchymal stem cels on metastasis of hepatocelular carcinoma is of great significance for improving the lifetime of hepatocelular carcinoma patients. OBJECTIVE:To explore the biological effect of human bone marrow mesenchymal stem cels on hepatocelular carcinoma cels with different metastatic potentials. METHODS:Human bone marrow mesenchymal stem cels and hepatocelular carcinoma cel suspension with high and low metastatic potentials were respectively injected into the Transwel chamber, and after 36 hours of co-culture, ELISA method was used to detect the absorbance value as wel as cel counting method was used to observe the changes in the invasion ability of hepatocelular carcinoma cels. The effects of human bone marrow mesenchymal stem cels on the proliferation of hepatocelular carcinoma cel suspension with high and low metastatic potentials were determined using cel counting kit-8. PCR method was adopted to measure the expression of osteopontin, bone specific sialoproteins, integration (alpha V), transforming growth factor beta 1 and programmed cel death protein 5. RESULTS AND CONCLUSION:(1) The number of migrated hepatocelular carcinoma cels was significantly lower in the co-culture group than the single culture group, and based on the semi-quantitative detection of invasion ability, the absorbance value of the co-culture group was significantly lower than that in the single culture group (P 0.05). In the co-culture group with low metastatic potential, the expression of osteopontin, bone specific sialoproteins, and integration (alpha V) were declined remarkably (P 0.05). However, in the co-culture group with low metastatic potential, the expression of transforming growth factor beta 1 and programmed cel death protein 5 was both increased dramaticaly (P < 0.05). These findings suggest that the human bone marrow mesenchymal stem cels reduce the invasion ability of hepatocelular carcinoma cels, and enhance their ability of proliferation.
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Objective To analyze the methods and strategy of treatment for multiple injuries in the use of damage control operation, and improve the treatment level and cure rate for multiple injuries.Method From March 2005 to March 2009, 21 patients with multiple injuries were treated by damage control strategy and performed the determinacy operation after the resuscitation in ICU. Results In 21 patients, 16 cases (76.2%) were cured and 5 cases (23.8%) were dead. The injury severity score of 5 dead cases were exceeded 35 points. Conclusions In the strategy of damage control operation, the surgical operation is considered to be a part of the total resuscitative procedure, not the ending of treatment. To those multiple injuries patients, it is safe and effective to perform the damage control operation. It has practical value in clinical treatment.
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Objective To analyze the etiology of duodenal trauma and improve the result of its diagnosis and treatment. Methods The data of 28 cases with duodenal trauma during March 1968 to September 2007 was analyzed retrospectively. Results Twenty-two (78.6%) patients had blunt injuries. The rate of duodenal trauma and associated injuries was 21.4%(6/28)and 89.3% (25/28) respectively. The easiest injury part on the deseending part constituting was 46.4% (13/28) ,the secondary on the horizontal part constituting was 21.4% (6/28).The postoperative complication rate was 28.6% (8/28), the mortality rate was 3.6% (1/28), and the cure rate was 96.4% (27/28). Conclusions The incidence of blunt injuries is high compared with other kinds of duodenal trauma in China. It suggests that the early diagnosis, exploration proper surgical management,and intensive postoperative care are emphasized to reduce the mortality and complication rate.