Mongolian gerbil is a multifunctional laboratory anima1 resource with Chinese characteristics.It has many advantages for some research fields, and play an important role.The more biological characteristics of Mongolian ger-bils discovered with in-depth research will promote diverse application of this resoure.In this paper, we reviewed the devel-opment of application of Mongolian gerbils in taxonomy, parasitology, microbiology, cerebral ischemia, lipid metabolism, neurological diseases, and cancer researches.

Objective To explore the clinical experience of liver retransplantation in management of biliary complications after liver transplantation.Methods The clinical data of patients receiving liver transplantion in our department between April 2002 and Aug. 2004 were retrospectively analyzed, including 5 patients being subjected to liver retransplantation because of serious biliary complication.Results Three patients were cured with the survival time being 5 months, 6 months and 8 months respectively. Two patients died at 8th and 43rd day: one died of liver non-function combining with lung infection and heart failure, and another died of renal failure. Complications included liver absess, biliary infection, wound infection, hydrops abdominis and lung infection.Conclusions Liver retransplantation is an effective treatment for serious biliary complications after liver transplantation. Surgical procedure, indication, operative opportunity, perioperative monitoring and so on contribute to the increase of the survival rate of the patients receiving liver retransplantation.

Objective To study the effects and mechanism of exercise on learning-memory of space and in aged rats after cerebral ischemia-reperfusion. Methods 20 SD rats at the age of 20 months with cerebral ischemia-reperfusion were randomly divided into 2 groups. The experimental group (n=10) received regularly exercise, while the control group (n=10) exercised freely. Morris water maze was tested 1 week after exercise, and the brain-derived neurotrophic factor (BDNF) mRNA expression on the ischemic side of the hippocampus were detected.Results The latency in the 2nd round decreased (P<0.05) and the path line on the platform increased (P<0.05) in the experimental group in Morris water maze test (P<0.05), while the BDNF mRNA increased (P<0.01), compared with control group. Conclusion Regular exercise can improve space learning-memory ability of cerebral ischemia-reperfusion aged rats, which may associate with increased BDNF mRNA expression in hippocampus.

Objective To optimize the scheme of Mongolian gerbil superovulation.Methods Based on the analysis of the animal-week-old, the dose and time interval of hormone, we got the best animal-week-old, dose and time interval of hormone for Mongolian gerbil superovulation.Results The 6 week old female Mongolian gerbils which injected of 10 IU PMSG and followed by 10 IU hCG in 70 hours later could get the best superovulation.We collected eggs at 16 hour after mate with male gerbils.The ovum pick-up rate reached 80%, the number of oocytes were 32.6 ±3.0, the number of the fertilized egg developed to 2-cell are 24.8 ±5.4.Conclusions This study summarizes the optimization scheme of Mongolian gerbil superovulation induced by PMSG and hCG and it supported the foundation for Mongolian gerbils embryo biotechnology.

A survey was conducted among 121 health care managers and health workers in community health care institutions with questionnaire and interview.Data on health care conditions in the community and health needs of elderly people were collected and analyzed using principle component analysis method.The priority order of 17 community health care projects for elderly people was ranked with this analysis method and the development strategy of community health service was suggested.

Objective To study improvement of cognitive function impairment of vascular dementia rats induced by a permanent bilateral ligation of common carotid arteries (2VO) after administration of leptin in brain. Methods Hippocampal neurons was isolated and cultured from SD rats. At oxygen-glucose deprivation condition, protection role of leptin on hippocampal neurons was observed and expression of leptin receptor was detected. Animal model of rats was established by 2VO. Pre-treatment VaD model of leptin was established by administration leptin into hippocampus region. The Morris water test was performed to detect difference in the cognitive function between VaD group and control group. Neuron apoptosis in hippocampus tissue were determined with TUNEL. Results Leptin receptor expression could be seen in hippocampal neurons. After oxygen-glucose deprivation cultured for 12 h , plenty of apoptotic cells were seen in hippocampal neurons, apoptosis rat was up to (72.96 ± 6.25) % , while apoptosis rate was (46.33 ±7.85)% and (23.58 ±5.08)% in 1 ( μg and 5μg leptin treatment group,respectively. Compared leptin treatment group with control group,difference had a statistical significance(P<0.01). Compared with untreated VaD group, latency time was shorter and average velocity was increased in leptin-treat-ment VaD group. Neuron apoptosis in hippocampus tissue of leptin-treated group were different significantly from those of untreated group (P < 0.01). Conclusion Leptin could protect hippocampal neurons from apoptosis in vitro. Cognitive function impairment could be improved by administration of leptin into brain in VaD rats.

Objective To clone and express Staphylococcus aureus drug resistance adenylyltransferase gene in E .coli BL21 ,and to make the foundation for its function research .Methods Primers were designed on the basis of adenylyltransferase gene in gen‐bank ,PCR was used to amplify adenylyltransferase gene using Staphylococcus aureus genomic DNA as template .The obtained PCR production was attatched with pGEX‐4t‐1(+ ) plasmid ,and transformed into E .coli BL21 (DE3) .The recombinant plasmid was di‐gested by double enzyme digestion and identified by gene sequence .The recombinant protein was induced to expression by IPTG and identified by Western‐blotting .Results Using Staphylococcus aureus genome as a template ,the target fragment about 800 bp was successful amplified .After enzyme‐cutting and DNA‐sequencing ,the target fragment showed that the ORF begin with ATG ,end with TAG ,783 bp in length ,the predicted isoelectric point and molecular weight were 7 .75 and 29 × 103 ,and it was homology 99%homology with the reported sequence gene in genbank .SDS‐PAGE and Western‐blot showed the molecular weight of recombinant fusion protein was about 55 × 103 .Conclusion Adenylyltransferase gene of Staphylococcus aureus was successfully cloned and ex‐pressed in E .coli as a fusion protein ,which makes the foundation for the research of its function .

Exfoliative cytology is a required course for medical diploma students majoring in pathological diagnosis and technology. However there exist no ready-made teaching materials to use or teaching models to follow.This paper discusses the attempts made to achieve preferable teaching result by formulating syllabus based on training scheme by carefully picking teaching content,combining case analysis with multimedia instruction and making new method of assessment.

Objective To analyze and evaluate the population genetic quality of outbred KM mice from National Rodent Seed Center ( Shanghai ) .Methods A total of 30 outbred KM mice were randomly chosen.The genetic characteristics of the population were determined by PCR and STR scanning using 30 selected microsatellite loci. Popgen1.32 software was used to process the data.Results Thirty microsatellite loci shared 123 alleles in the KM mouse population.The average effective allele number and the average heterozygosity were 2.3989 and 0.5342, respectively.The average polymorphism information content ( PIC ) was 0.4735.Conclusions The outbred KM mouse population of Shanghai Seed Center has genetic stability and genetic diversity, and is satisfied with the genetic characteristics of closed colony laboratory animal.

Objective To investigate the protein expression and genetic alterations of c-myc in primary systemic anaplastic large cell lymphoma (ALCL) and discuss its relationship with clinicopathologic features and immunophenotypes.Methods 87 cases of ALCL were selected.Immunohistochemical method was used to detect the protein expression of c-myc,ALK,CD3,CD10,CD20,CD30 and EMA.c-myc and ALK genetic alterations were detected by using fluorescence in situ hybridization (FlSH).The interrelationships between protein expression,genetic alterations and clinicopathological parameters were analysed statistically.Results Immunohistochemical results:of 87 cases,ALK protein was expressed in 54 cases (62.1％).c-myc protein was expressed in 27 cases (31.0 ％).ALK and c-myc were co-expressed in 20 cases (23.0 ％).c-myc protein expression,ALK and c-myc co-expression increased with the upgrade of ALCL clinical stages,and the expression was higher in International Prognostic Index (IPI) high-risk groups than in low-risk groups (P ＜ 0.05).FISH test results:of 87 ALCL cases,there were 50 cases (57.5 ％) of ALK rearrangements and 19 cases (21.8 ％) of ALK aneuploidy.c-myc rearrangement was detected in none of 87 ALCL cases,but there was aneuploidy in 19 cases (21.8 ％).The differences of c-myc aneuploidy in ALK positive and negative groups were statistically insignificant (P ＞ 0.05),while they were statistically significant in c-myc groups (P ＜ 0.05) and in different IPI groups (P ＜ 0.05).Conclusion c-myc protein expression and aneuploidy were related with ALCL clinical stages and IPI,which could be used as an indicator of estimating ALCL malignant degree and predicting prognosis.