Objective To investigate specific anti-leukemia immune response induced by tumor lysates pulsed dendritic cells(TP-DC)in syngeneic bone marrow-transplanted mice.Methods From June 2002 to June 2003,the bone marrow cells were induced by using granulocyte-macrophage colony stimulating factor(mGM-CSF)and interleukin-4(mIL-4).DC was pulsed with L7212 tumor lysates at the immature stage.TP-DC was harvested on 7th day.615 mice immunized thrice with L7212 TP-DC starting at day 7 following BMT.Additional control groups were set up.The survival was observed.Results Immunization using TP-DC could induce L7212 cells-specific CTL responses that were statistically significant compared with control groups(F=391.77,P

OBJECTIVE:To study the hepatoprotective effect of the extract of Sabia parviflorawall(SPS) on mice with experimental liver injury.METHODS:The liver injury models were reproduced in mice with CCL4 and Paracetamol(AAP),respectively with the activities of serum ALT and AST measured.RESULTS:The activities of serum ALT and AST were all reduced to a certain degree in mice with liver injury induced by either CCL4 or Paracetamol(AAP).CONCLUSION: SPS exhibited certain hepatoprotective effect.

Objective To investigate whether the mortality and death causes of renal transplant recipients have changed from 1985 to 2002 in our center.Methods 145 cases of renal transplant recipients who died during 1985 to 2002 were divided into 3 groups: 1985 to 1990,1991 to 1996,1997 to 2002. The death causes and the mortality on the 1st ,2nd,3rd,4th and 5th year post transplant of each group were reviewed.Results During the three periods,the 1st,2nd,and 3rd year mortality was decreased. Infection as a cause of death fell from 31.8 % to 29.2 % and 26.7 % . Whereas death from liver disease,cancer and cardiovasvular diseases was increased.Conclusions The mortality is decreased. Infection,cardiovascular diseases,liver diseases and cancer were the main causes of death after transplantation from 1985 to 2002. It is important to prevent these diseases and treat them effectively in order to improve the recipients' survival rate.

BACKGROUND: Bone marrow mesenchymal stem cells (MSCs) have been widely accepted by medical investigators due to their advantages including easy obtaining, minimal invasion, with infinite proliferation and multi-differential potential, and without immunological rejection in the autologous transplantation. OBJECTIVE: The goal of this study is to isolate and purify rat bone marrow MSCs in vitro, so as to observe the effects of different concentrations of serum containing kidney-tonifying and blood-activating Chinese herbs on the in vitro proliferation of rat bone marrow MSCs.DESIGN: A randomized controlled animal experiment.SETTING: Hip Center, First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine.MATERIALS: Forty healthy male SD rats of SPF grade, weighing 170 to 180 g, were provided by the Laboratory Animal Center, Guangzhou University of Traditional Chinese Medicine. The protocol was performed in accordance with ethics guidelines for the use and care of animals. The involved rats were divided into 4 groups by random digit table with 10 rats in each: normal control group, high-, middle-, and low-concentration groups. METHODS: This study was performed at the Laboratory Animal Center, Guangzhou University of Traditional Chinese Medicine between January and March 2005. Rat bone marrow MSCs were isolated and purified by Percoll density gradient centrifugation, and cultured in vitro to establish rat bone marrow MSCs culture system. Rats in the high-, middle-, and low-concentration groups were intragastrically administrated with 4.4, 2.2 and 1.1 g/kg serum containing kidney-tonifying and blood-activating Chinese herbs, which equaled to 20, 10 and 5 times of adult dosage, respectively. Rats in the normal control group were intragastrically administrated with purified water for 1 week. One hour after the last administration, 6 mL blood was taken from abdominal aorta of each rat under the aseptic condition. Then, it was centrifuged at 2 000 r/min for 15 minutes, and meanwhile serum was collected. 10% rat serum containing kidney-tonifying and blood-activating Chinese herbs was added to the medium in the high-, middle-, and low-concentration groups, while 10% fetal bovine serum was added in the normal control group. MAIN OUTCOME MEASURES: ① MSCs growth status; ② MSCs morphology was observed by HE staining and Giemsa's staining; ③ MSCs antigen expression was detected by an immunocytochemical method; ④ Effects of different concentrations of serum containing kidney-tonifying and blood-activating Chinese herbs on MSCs growth.RESULTS: ①The primarily cultured bone marrow MSCs began to adhere to the wall 24 hours later and 80% of them reached the confluence 7 days later. ② MSCs took appearance in long shuttle shape or polygon. These cells were little. Nuclei were located in the middle part of cells or a little deviation. The ratio of nucleus to cytoplasm was a little high. ③CD44 expression was found in the cytoplasm of mononuclear cells, and colored blue. Partial MSCs expressed c-Kit. Their cytomorphology and phenotypic expression have the characteristics of MSCs. ④Three days after serum containing kidney-tonifying and blood-activating Chinese herbal medicine being added to high-, middle-, and low-concentration groups, the number of bone marrow MSCs was dose-dependently increased as compared with that in the normal control group. CONCLUSION: Serum containing kidney-tonifying and blood-activating Chinese herbs promotes the in vitro proliferation of bone marrow MSCs.

Objective To investigate the inhibitory effects of emodin on herpes simplex virus typeⅠandⅡ(HSV-Ⅰand HSV-Ⅱ)in vitro.Methods The antivirus effects of the derivates of anthraquinones component from rhubarb (emodin,rhein,physcion,aloeemodin,and chrysophanol)on HSV-Ⅰand HSV-Ⅱin rabbit renal cells were evaluated by means of the inhibition of cytopathic effect.Results Emodin can inhibit the cytopathic effect of HSV-Ⅰat the tolerance dosage of 3.75?g/mL and can inhibit the cytopathic effect of HSV-Ⅱat the tolerance dosage of 15.0?g/mL.Conclusion Emodin has in-vitro antivirus effects on herpes simplex virus typeⅠandⅡ,while other derivates such as rhein,physcion,aloe-emodin,chrysophanol have no such effects.

ObjectiveTo study the influence of different culture conditions in vitro on phenotype, proliferation and cytoskeletal proteins expression of vascular smooth muscle cells(VSMCs). Methods The cultured VSMCs from rat aorta were divided into six groups: P2 control,P2 starvation,P4 control,P4 starvation,P6 control and P6 starvation. The proliferating cells were labeled by 5-bromodeoxyuridine (5-BrdU); The mRNA expression of smooth muscle 22 alpha (SM22α) was detected by reverse transcription-polymerase chain reaction method (RT-PCR); The cytoskeletal proteins including SMα-actin,β-Tubulin and Desmin were observed through immunohistochemical staining. Results With the increase of cell passage, cytoskeletal proteins expression of VSMCs decreased,cellular organs increased and secretory vesicles were abundant; in serum-free cultured cells mitochondria increased and electron density enhanced in cytoplasm of VSMCs.On the contrary the expression of SMα-actin decreased, and the expression of SMα-actin increased. The expression of β-Tublin and Desmin decreased more obviously, and at 6 passages failed to express. Conclusion The conditioned medium and serum-free had the different effects on the phenotype,proliferation and cytoskeleton of VSMCs in different passage, and there was internal relationship among them. The internal relationship played an important role in the maintaining of cell morphology, contractile function and vascular remodeling. The disappearance of expression of β-Tubulin and desmin might have important biological significance.

Polylactide and its copolymers are polymer materials that can be degraded by organisms and have good biocompatibility. Since the polymer materials have no toxicity and can be absorbed, greater and greater attention has been paid to the related researches and development, and they are increasingly applied in various areas, especially medicine and pharmacy. There are three methods for preparing polylactide and its copolymers. The tests for evaluating the degraded property of polylactide and its copolymers have been existing for more than thirty years, but all of them have their defects. The property and technological level of polylactide and its copolymers remain to be improved for use in some areas. Once the manufacture of poly actide is industrialized, it can be of wide application in the fields of medicine and degraded plastics.

Objective To develop the hypothesis ‘saturated or non-saturated cytotoxicity model' and explain the various phenomena of antibody mediated immunoresponses in recipients,including rejection and accommodation.Methods The imitating complement dependent cytotoxicity.The threshold set to identify as saturated or non-saturated cytotoxicity depends on antigen-antibody complex(R)whether or not above lethal number(D)in effective time.Feasibility of the hypothesis was examined through explaining various phenomena mediated by anti-donor antibodies,especially some contradictory phenomena.Results Hyperacute rejection,accelerated rejection and acute rejection could be well explained by saturated cytotoxicity.Accommodation of ABO imcompatible transplantion,de novo antibody induced injury,change of protein profile,and C4d deposition in graft could be well elucidated by the hypothesis.Conclusion The hypothesis saturated or nonsaturated cytotoxicity model' help to interpret and interconnect various phenomena of antibodies mediated immune response,such as rejection and accommodation.

Objective To observe the effect of saikosaponin-d on transcriptional activation of estrogen receptor in rat hepatic stellate cells(HSC-T6), and to explore its pharmacological mechanism. Methods The rat HSC-T6 were cultured in vitro for the study. After transient transfection of HSC-T6 with the ER-specific reporter gene ERE-tk-Luc by liposome, the effect of saikosaponin-d and estradiol on luciferase activity was observed by Dual-Luciferase Reporter Assay System under the conditions of various drug concentrations, various treatment time and addition of estrogen receptor inhibitor ICI182. 780. Results When the concentrations of saikosaponin-d and estradiol were in the range of 0.01-5 μmol/L, 0.01-1 μmol/L respectively, luciferase activity was increased in a dose-dependent manner . Luciferase activity arrived the highest when saikosaponin-d concentration was 5 μmol/L and estradiol concentration was 1 μmol/L, but the effect was weakening when estradiol concentration reached 5μmol/L. In respect of the effect of treatment time, when HSC-T6 were separately treated with 5μmol/L of saikosaponin-d and 1 μmol/L of estradiol for 24 h, the luciferase activity was the highest. And ICI182.780 could significantly inhibit the induction of saikosaponin-d and estradiol for luciferase activity. Conclusion Saikosaponin-d has an effect on promoting the transcriptional activation of estrogen receptor in HSC-T6.

Objective: To investigate the epidemiological and etiological characteristics of viral diarrhea among children under 5 years of age in Shaoxing City, Zhejiang Province, so as to provide insights into management of viral diarrhea. Methods: The surveillance data on viral diarrhea among children under 5 years of age in Shaoxing City from 2019 to 2022 were collected, including demographics and stool testing results. The epidemiological and etiological characteristics of viral diarrhea were analyzed using a descriptive epidemiological method. Results: A total of 763 diarrheal children under 5 years of age were reported in Shaoxing City from 2019 to 2022, and 236 children were tested positive for virus (30.93%). The detection of virus was 49.01%, 31.61%, 20.43% and 21.89% from 2019 to 2022, which appeared an overall tendency towards a decline (P<0.05). The incidence of viral diarrhea peaked from November to March of the next year and from May to July, and the detection of virus was lower among children with diarrhea living in urban areas (Yuecheng District, Keqiao District and Shangyu District) than among those in suburb areas (Zhuji City, Shengzhou City and Xinchang County) (30.22% vs. 52.00%, P<0.05). There were 206 children tested positive for a single virus, and the detection rates of rotavirus (RV), enteric adenovirus (EAdV), norovirus (NoV), and sapovirus (SaV) were 9.57%, 8.91%, 8.39%, and 0.13%, respectively. There were 25 children with virus co-infections, and the positive rates of EAdV and NoV, RV and EAdV and RV and NoV co-infections were 1.31%, 1.18% and 0.79%, respectively. There were 5 children with triple infections of RV, EAdV and NoV (0.66%). The highest detection of EAdV was seen in April, the highest detection of RV and NoV was seen in January, while SaV was only detected in April. Conclusion The incidence of viral diarrhea among children under 5 years of age peaked in winter and spring in Shaoxing City from 2019 to 2022, and the cases predominantly occurred in urban areas. The detection of virus appeared an overall tendency towards a decline, with high detection of RV, EAdV and NoV.