Cytochrome P4503As(CYP3As),the liver microsomal enzymes responsible for oxidative metabolism of numerous clinically used drugs,is known to be induced by a variety of compounds,including naturally occurring and synthetic glucocorticoids,pregnane compounds,and macrolide antibiotics.The pregnane X receptor(PXR;NR1I2) is an important component of the body′s adaptive defense against xenobiotics including drugs.PXR is activated by a large number of endogenous and exogenous chemicals including steroids,antibiotics,antimycotics,bile acids,and the herbal antidepressant St.John′s wort.PXR binds as a heterodimer with the 9-cis retinoic acid receptor(NR2B) to DNA response elements in the regulatory regions of CYP3A genes.Although PXR evolved to protect the body,its activation by a variety of prescription drugs represents the molecular basis for an important class of harmful drug interactions.

OBJECTIVE:To investigate the hemostatic effect and safety of hemocoagulase in radical gastrectomy.METHODS:60 cases with gastric cancer were divided on average into 2 groups.Therapy group received hemocoagulase 2 KU during and after operation,and control group received dicynone 0.5 g and aminomethylbenzoic acid 0.2 g during and after operation.Intraoperative blood loss and amount of blood drainage at 6 h and 24 h after operation were observed.The value of D-dimer was monitored after operation.RESULTS:Intraoperative blood loss and amount of blood drainage at 6 h and 24 h after operation in therapy group were less than in control group (P

Liver metastasis is the main fact or affecting prognosis.The treatment includes surgery,chemotherapy,gene therapy and local therapy(radiofrequecy,late,PEI and cryotherapy),of which surgery is only curative method.Mortality of surgery is 1%-2%,5-year survival is 35%-38%,but only 10%-25% of liver metastasis of colorectal cancer can receive surgery,so other methods of therapy are considered.We will summarize the mulfi-modal therapy of liver metastasis of colorectal cancer.

Liver metastasis is the leading cause of death from colorectal cancer (CRC).Multidisciplinary team model has become standard strategy for the diagnosis and treatment of colorectal liver metastases (CRLM),making individualized treatment through precise staging and molecular typing.Preoperative hepatic and regional arterial infusion chemotherapy and portal vein chemotherapy during surgery can reduce the incidence of liver metastases for stage Ⅲ CRC.Surgical resection of CRLM has been accepted by all scholars,and can be performed by minimally invasive surgery.The criteria for hepatic resection of CRLM have been extended including complete tumor resection,negative resection margin and adequate remnant liver volume.Simultaneous resections of primary tumor and liver metastases are safe and feasible.However,neoadjuvant chemotherapy is still controversial.For unresectable liver metastases,conversion therapy should be implemented to make the liver metastases become resectable.For unconvertible and unresectable CRLM,aggressive and comprehensive treatment is required to control the disease progression.

Objective To investigate the effects of vitamin D deficiency on pregnancy and fetal development in mice. Methods All female ICR mice were randomly divided into two groups. In control group, mice were fed with standard feeds (vitamin D3 >800 IU/kg). In vitamin D deficiency group (VDD), female mice were fed with feeds with vitamin D depletion (vitamin D3 <25 IU/kg). For mating purposes, four females were housed overnight with two males starting at 9 : 00 PM. Females were checked 7 : 00 AM the next morning, and the presence of a vaginal plug was designated as gestational day (GD) 0. All pregnancy mice were sacrificed on GD18. For each litter, the number of live fetuses, dead fetuses and resorption sites were counted. Live fetuses in each litter were weighed. Crown-rump lengths were examined. And skeletal development of all live fetuses in each litter was evaluated. Re-sults The pregnancy rate was lower in VDD group than that in control group(P<0.05). The number of live fetu-ses was significantly decreased(P<0.05). By contrast, the numbers of dead fetuses and resorption sites were sig-nificantly increased(P<0.05). In addition, the average weights of fetuses and placenta were reduced in vitamin D deficiency group. Moreover, vitamin D deficiency resulted in skeletal development retardation in fetuses. Conclu-sion Vitamin D deficiency impairs pregnancy and developmental outcomes in mice.

Aim To study effects of N-Acetylcysteine on Lipopolysaccharide-induced immunological liver injury in mice. Methods A model of immunological liver injury was induced by injection of LPS in mice primed with BCG. NAC was administered in two different modes. In mode A, mice were pretreated with two doses of NAC before LPS, one (150 mg?kg-1, ip) at 4 h before LPS and the other (150 mg?kg-1, ip) at 15 min before LPS. In mode B, mice were administered with two doses of NAC after LPS, one (150 mg?kg-1, ip) injected immediately after LPS and the other (150 mg?kg-1, ip.) injected 4 h after LPS. Some mice were sacrificed at 1.5 h after LPS and livers were dissected for total RNA extraction. Hepatic TNF-? mRNA level was determined by using RT-PCR. The remaining mice were sacrificed at 8 h after LPS. Blood serum was collected for measurement of alanine aminotransferase (ALT) and nitrate plus nitrite. Livers were dissected for measurements of GSH and lipid peroxidation. Results Pretreatment with NAC significantly alleviated LPS-induced increase in ALT activity, attenuated LPS-induced hepatic GSH depletion and TNF-? mRNA expression in mice primed with BCG. However, NAC had no effects on LPS-induced NO production and hepatic lipid peroxidation. By contrastwith pretreatment, posttreatment with NAC had littleeffects on LPS-induced immunological liver injury and in fact aggravated LPS-induced NO production and hepatic GSH depletion and increased LPS-induced mortality in mice primed with BCG. Conclusion NAC has a dual effect on LPS-induced immunological liver injury. Pretreatment with NAC protects against LPS-induced immunological liver injury via counteracting LPS-induced oxidative stress and TNF-? mRNA expression in mouse liver. However, when administered after LPS, NAC behaves as a prooxidant and aggravates LPS-induced mortality in mice primed with BCG.

With the development of modem clinical medical engineering,especially some large medical equipment,medical engineering section needs more talents in management and maintenance profession.Aiming at problems in the section construction,some viewpoints and suggestions are put forward.It is expected that the leadership could attach importance to medical engineering section,make good use of the talents and lay solid foundation for the development of hospitals.

Aim To investigate whether melatonin ( MT) can alleviate endoplasmic reticulum( ER) stress at an early stage of bleomycin( BLM)-induced lung fi-brosis in mice. Methods Adult healthy male ICR mice were divided randomly into control group, MT group, BLM group and MT + BLM group. In MT group, mice had saline treatment 30 minutes after hav-ing the intraperitoneal injection of MT (10 mg·kg-1 ) and had been intraperitoneally injected with MT once in the following every 24 hours. In BLM group, mice were intratracheally injected with a single dose of BLM (5 mg·kg-1). In MT+BLM group, mice had been intraperitoneally injected with BLM 30 minutes after having MT and had been injected with MT once in the following every 24 hours. In control group, mice re-ceived the same level of saline treatment in the same manner. All mice were dissected for collecting the tis-sue of lungs at different time points (24h, 72h) after BLM treatment. Inflammatory cell infiltration of lungs was determined by HE staining. The level of ER stress related proteins ( GRP78 , p-eIF2α, p-IRE1α) in lungs was determined using Western blot. The distribu-tion of ER stress related proteins ( GRP78 , p-IRE1α, ATF6α, p-PERK) in lungs was detected by immuno-histochemistry. Results The model of BLM-induced acute inflammation of lung fibrosis in mice had been successfully constructed. After BLM treatment, lung weight, lung weight ratio and inflammatory cell infiltra-tion were significantly increased with a significant cor-relation between time and effectiveness. After MT treatment, lung weight, lung weight ratio and inflam-matory cell infiltration were significantly reduced. The results of Western blot showed that MT pretreatment not only prevented the increase of BLM-induced GRP78 protein significantly, but also restrained the phosphorylation of eIF2α and IRE1α in mouse lungs. Immunohistochemistry also showed that MT pretreat-ment reduced the expression of GRP78 , p-IRE1α, ATF6α and p-PERK. Conclusion MT alleviates ER stress effectively at an early stage of BLM-induced lung fibrosis in mice.

Objective We investigate lipid peroxidation of compressed myeloid tissue at early stage after decompression of chronic compressive spinal cord injury.Method SOD and MDA of compressed myeloid tissue are measured respectively before compression,before decompression and 3h after decompression.Result Increased MDA while decreased SOD of compressed myeloid tissue at 3h after decompression than before decompression.Conclusion The increased lipid peroxidation of compressed myeloid tissue at early stage after decompression of chronic compressive spinal cord injury.It is possible that it was resulted from ischemical reperfusion injury.

Objective To observe the therapeutic effect of stellate ganglion block (SGB) combined with Tianshu capsule on migraine.Methods Ninty patients with migraine were randomly divided into the trial group (n=44, treated by SGB combined with Tianshu capsule) and control group (n=46, treated by SGB only). All patients of two groups were evaluated with numeric rating score (NRS) for pain before treatment and 1 day, 3 days, 1 week, 1 month and 3 months after treatment, and the therapeutic effects of two groups were compared.Results The NRS scores of patients in the two groups at each time point decreased, but scores of patients in the trial group were significantly lower than that in the control group at 3 days, 1 month and 3 months after treatment ( P<0.05). The effective rate of the trial group was superior to that of the control group ( P<0.05).Conclusion SGB combined with Tianshu capsule is more effective on migraine and has less side effect.