Stem cells research has generated markedly increasing interest and liver stem cells have enormous potential for clinical applications.Based on the development of modern cell biology,molecular biology and genetics,the fundamental study and clinical application of liver stem cells have been greatly progressed.This paper reviews current development of liver stem cells for clinical application.

AIM: To construct a recombinant adenovirus vector carrying AFP promoter to specifically express a targeting gene in hepatocellular carcinoma HepG2 cells. METHODS: Based on the Adeno-X~TM Expression system, the CMV promoter was replaced by a 300 bp a-fetoprotein promoter. The EGFP(enhanced green fluorescent protein) gene as a report gene was inserted to the multiple-cloning site(MCS). The normal liver LO2 cells, hepatocellular carcinoma HepG2 cells and HeLa cells were infected by the recombinant adenovirus, respectively. Northern blotting and fluorescence microscope were used to detect the transcription level of EGFP gene and its protein expression, respectively. RESULTS: Northern blotting showed that the target gene was markedly transcribed in HepG2 cells, but slightly in LO2 and HeLa cells. Under the fluorescence microscope, strong EGFP expression was seen in HepG2 cells but very weakly in HeLa and LO2 cells. CONCLUSION: Under the control of the 300 bp human AFP promoter, the target gene carried by the recombinant adenovirus was expressed in the AFP-producing HepG2 cells at a very high level, but not or very weakly in AFP negative cells. This adenovirus system can be used as a new, potent and specific approach for the gene-targeting therapy for the AFP producing primary hepatoma. [

Objective To evaluate the diagnostic and therapeutic methods for hilar bile duct carcinoma. Methods The clinical data of 36 patients with hilar bile duct carcinoma from Jan 1998 to Jul 2003 were retrospectively analyzed. Results The misdiagnosis rate(39%) was high. All patients underwent a surgery. The median survival time of 16 patients treated by radical resection was 30 months. The 1,3,5-year survival rate was 93%,50% and 25% respectively. While the median survival time of the rest 20 patients treated by a variety of non-radical operation was 16 months with 1,3,5-year survival rate of 47%,8% and 0 respectively(t=2.585).Conclusions Early diagnosis and radical resection improves long-term survival of patients with hilar bile duct carcinoma.

In this study, we designed and synthesized 12 novel aloperine derivatives with different core structures. Among them, compound 3 with a ten-membered ring core was obtained through a special ring expansion reaction after γ-H Huffman elimination of quaternary ammonium salt, and the structure was verified by X-single crystal diffraction. Furthermore, their antiviral activity against human β-coronavirus HCoV-OC43 was evaluated by CCK-8 assay. Quaternary ammonium salt 2a and 3 had a good inhibitory effect against HCoV-OC43, and 2a had the highest anti-HCoV-OC43 activity with an EC₅₀ values of 3.77 μmol·L^-1 and a SI value of over 53.1. Schrӧdinger molecular docking results showed that both 2a and 3 might display their anti-HCoV-OC43 activity by directly acting on host TMPRSS2 and SR-B1. The results expanded the structural types of endocyclic aloperine and the function against coronavirus, and provided useful scientific data for the development of pharmaceutical applications of these compounds.

Background and purpose: The incidence and mortality of lung cancer ranked first in China. This study aimed to describe lung cancer survival in Shanghai, and provide background information for cancer prevention and treatment evaluation. Methods: Data of lung cancer cases diagnosed during 2002-2006, follow-up information and death report were collected from Shanghai Cancer Registry. Life table method and Ederer Ⅱ were used to calculate observed survival (OS) and relative survival (RS) respectively. Related demographic characteristics and status were also analyzed to present the survival situations of the lung cancer survivors in Shanghai. Results: In this study, 41802 lung cancer cases were included in analysis. The 5-year OS and RS for lung cancer were 13.75% and 20.23% respectively, and median survival time was 318 days. Survival rate was higher among females than males, with the 5-year OS of 15.49% and 13.00% respectively. The 5-year OS was higher among suburban residents (14.25%) than urban residents (13.23%). Survival rates decreased with increasing age and advanced stage. Patients aged 0-34 had a 5-year OS of 38.21%, while patients aged above 75 had a 5-year OS of 5.48%. Patients diagnosed with stage Ⅰ had a 5-year OS of 55.47%, while patients diagnosed with stage Ⅳ had a 5-year OS of 5.27%. Survival of lung cancer patients differed by tumor histological subtype. The 5-year OS of squamous lung cancer (24.40%) was higher than other histological types, followed by adenocarcinoma (22.26%), large cell (20.27%) and small cell lung cancer (12.22%). From 1972-1976 to 2002-2006, the 5-year OS of urban male patients increased from 6.8% to 12.4%, and 5-year OS of urban female patients increased from 7.3% to 14.9%. Analysis of RS gave the similar results. Conclusion: During the past 30 years, survival rate of lung cancer patients in Shanghai improved steadily, and the survival condition is above average among different countries and areas. However, survival rate of lung cancer is still low compared with other types of cancer. Future focus should be placed on the control of tobacco smoking, early detection by low-dose helical computed tomography and targeted therapy to further improve lung cancer survival.

Animals ; China ; epidemiology ; Environmental Monitoring ; instrumentation ; Epidemiological Monitoring ; Geographic Information Systems ; Humans ; Satellite Communications ; instrumentation ; Schistosomiasis japonica ; epidemiology ; Snails ; parasitology ; Topography, Medical ; instrumentation ; methods

Dunhuang medicine is a branch of Dunhuang studies, including the characteristics of Dunhuang ancient medical prescriptions and treatment technique.Dunhuang Dabupi Decoction has good efficacy in nourishing vitality and yin and promoting the production of body fluid. Professor WANG Dao-kun used the prescription to treat gastric stuffiness, gaining significant curative effect. This article summaried cases of using this prescription, to show the advantages of Dunhuang ancient medical prescription Dabupi Decoction for present use.

Objective To observe skin test results of tetanus antitoxin prepared by different solvents.Methods Patients who needed injecting tetanus antitoxin as required by trauma were randomly divided into two groups, Group A and Group B, respectively. Group A was administered with tetanus antitoxin prepared by water for injection, while Group B with tetanus antitoxin prepared by saline. Skin test results were observed, the incidence of positive skin test results and self-inductance of pain intensity were compared.Results The incidence of positive skin test results in Group A was significantly higher than that in Group B (34.19% vs 17.50%,χ2=8.631,P<0.01), and the self-inductance of pain intensity were also greater than that in Group B. Patients with positive skin test results (40 patients) in Group A, were later injected tetanus antitoxin prepared by saline, 42.50% of them (17 patients) shown negative skin test results.Conclusions There might be a high false positive rate by using tetanus antitoxin prepared by water for injection; therefore tetanus antitoxin prepared by saline is recommended, for it could decrease the false positive rate, reduce unnecessary desensitization injections, alleviate patients' pain and improve nurses' work efficiency.

OBJECTIVETo investigate the expression of nuclear export factor CRM1, Ser10-phosphorylated p27 and p27 in human gliomas.

METHODSThe expression of CRM1, Ser10-phosphorylated p27 and p27 were investigated in 70 cases of human gliomas and 10 specimens of the normal brain tissue by immunohistochemical technique and Western blot.

RESULTSThere were significant differences on the expression levels of CRM1, Ser10-phosphorylated p27 and p27 among normal brain tissue, gliomas of grades II and gliomas of grades III plus IV (P < 0.01). The expression of CRM1 in gliomas was inversely correlated with the expression of p27 (r(s) = -0.727, P < 0.01) and positively correlated with the expression of Ser10-phosphorylated p27 (r(s) = 0.954, P < 0.01) and Ki-67 (r(s) = 0.799, P < 0.01). Moreover, the expression of Ser10-phosphorylated p27 was inversely correlated with p27 (r(s) = -0.744, P < 0.01) and positively correlated with Ki-67 (r(s) = 0.785, P < 0.01).

CONCLUSIONSCRM1, through recognizing and binding with Ser10-phosphorylated p27, may promote moving of p27CRM1 from its original locating sites; act as a critical signaling component in the proliferative process of glioma cells and then, plays an important role in the development of gliomas.

Active Transport, Cell Nucleus ; genetics ; Adolescent ; Adult ; Aged ; Brain Neoplasms ; genetics ; metabolism ; Child ; Cyclin-Dependent Kinase Inhibitor p27 ; genetics ; metabolism ; Gene Expression Regulation, Neoplastic ; Glioma ; genetics ; metabolism ; Humans ; Middle Aged ; Nuclear Export Signals ; genetics ; Phosphorylation ; Prognosis ; Young Adult

OBJECTIVETo investigate the protective effect of limited fluid resuscitation against intestinal ischemia- reperfusion injury in postpartum rabbits with severe uncontrolled obstetrical hemorrhagic shock.

METHODSTwenty- four postpartum rabbits were randomly assigned into sham shock group (group P), shock group without interventions (group P0), conventional fluid resuscitation group (group PNL), and limited fluid resuscitation group (group PLH), and the model of severe uncontrolled hemorrhagic shock was established in the latter 3 groups. The rabbits were sacrificed 4 h later, and SOD activity and MDA content in the intestinal mucosa and the degree of injury to the intestinal mucosa were observed.

RESULTSIschemia-reperfusion injury of the intestine due to uncontrolled hemorrhagic shock resulted in decreased SOD activity and increased MDA content. The MDA content was significantly lower and SOD activity was significantly higher in group PLH than in group PNL (P<0.05), and the intestinal mucosal tissue morphology and intestinal mucosa barrier lesion increased in group PLH.

CONCLUSIONInitial limited fluid resuscitation can relieve intestinal ischemia-reperfusion injury in postpartum rabbits with severe uncontrolled obstetrical hemorrhagic shock.

Animals ; Disease Models, Animal ; Female ; Fluid Therapy ; methods ; Intestines ; blood supply ; Pregnancy ; Rabbits ; Reperfusion Injury ; etiology ; prevention & control ; Shock, Hemorrhagic ; complications