OBJECTIVETo investigate the changes in the expression of phospholipase C-gamma1tyr783 (PLC-γ1tyr783) in the condylar cartilage of a young rat during functional mandibular protraction. This work also explores the function of PLC-γ1tyr783 in the rat mandibular condylar cartilage bone remodeling, which could provide experimental evidence for clinical bone ortho- pedic work.

METHODSA total of 60 four-week-old male Sprague-Dawley (SD) rats were used in this study. The rats were divided equally and randomly into experimental group and control group. The functional appliances that were fitted to the upper incisors of the animals in the experimental group were worn 24 h a day after the rats were fed for 7 d with homemade pellet feed. The animals in the experimental group, along with their matched controls, were sacrificed after 1, 3, 7, 14, 21, and 28 d. The bilateral condylar was fixed, decalcified, dehyded, and then conventional paraffin embedded. Immunohisto- chemistry of PLC-γ1tyr783 was applied to observe its express distribution and variation.

RESULTSThe expression of PLC-γ1tyr783 decreased gradually in the control group, which showed age-related changes (P > 0.05). On the 14th day, PLC-γ1tyr783 expres- sion in the experimental group was significantly higher than that in the control group. PLC-γ1tyr783 expression began to appear statistically and significantly different between the two groups (P < 0.01).

CONCLUSIONPLC-γ1tyr783 is involved in the bone remodeling process of the rat condylar cartilage after functional mandibular-protraction.

Objective To observe the changes of PECAM-1,Bcl-2 and Bax expressed by ischemic cerebrum of adult rats after focal cerebral ischemia. Methods Middle cerebral artery occlusion (MCAO) models were made by operation with Longa suture method in Wistar rats. The expression levels of PECAM-1,Bcl-2 and Bax at the 6th,12th,18th,24th,48th,72nd hour after MCAO were detected by immunohistochemistry staining. Results The expression levels of PECAM-1,Bcl-2 and Bax in cerebrum were significantly increased after MCAO. The expression levels of Bcl-2 we、re up to the peak at the 12th hour after MCAO, while the levels of Bax and PECAM-1 were up to the peak at the 24th and 48th hour after MCAO. At the 72nd hour after MCAO, the expression levels of PECAM.1.Bcl-2 and Bax were still higher than that in the control group(all P＜0.001).Conclusions PECAM-1,Bcl-2 and Bax participate in the different pathological stages of focal cerebral ischemia.

Objective To study the comprehensive therapeutic effect of interventional embolization chemotherapy in advanced cervical cancer. Methods 136 patients with advanced cervical cancer were selected as research object,and they were randomly divided into control group(radiotherapy group) 68 cases and observation group(interventional embolization chemotherapy group) 68 cases,then the total effective rate,incidence of adverse reactions,secondary operation rate and serum CA125 ,SCC and CY211 of two groups before and after the treatment were analyzed and compared. Results The total effective rate( 83. 8% vs 66. 2% ) and secondary operation rate(89.7% vs 48.5% )of observation group was higher than that of control group, incidence of adverse reactions (63.2% vs73.5 % ) was lower than that of control group,serum CA125 [(37. 89 ± 16. 78) vs(52. 36 ± 16. 98) U/ml], SCC[(0. 68 ± 0. 42) vs (1.52±0.36)μg/L]and CY211[(4.86 ±2.21)vs(8.45 ±2.85)ng/L]were all lower than those of control group. ( P ＜0.05 or P ＜0.01) , there were significant differences. Conclusion The comprehensive therapeutic effect of interventional embolization chemotherapy in advanced cervical cancer was better,and it was one of effective methods in advanced cervical cancer.

Objective To assess cerebrovascular reserve capacity in patients with obstructive sleep apnea-hypopnea syndrome(OSAHS).Methods One hundred and fourteen patients with OSAHS and 43 normal persons were enrolled in this study.The patients were divided into mild,moderate,severe according to apnea hypopnea index (AHI) and LSaO2 (lowest arterial oxygen saturation).All the patients and normal persons were routinely examined using transcranial Doppler (TCD) and end-tidal carbon dioxide partial pressure(ETCO2) to evaluate cerebrovascular reserve.Hypercapnia was induced by inhaling the CO2 which produced by the patients themselves,and hypocapnia was elicited by voluntary hyperventilation.Results CVR in the severe and moderate OSAHS were significantly lower than that in the control group [ (1.80 ± 1.34) ％/mm Hg and (1.43 ±1.05)％/mm Hg vs (2.93 ±0.93)％/mm Hg,P ＜0.05] when patients in the condition of hypocapnia.And there was no significant difference on CRV between the mild OSAHS group and control group [ (2.53 ±1.83 ) ％/mm Hg vs ( 2.93 ± 0.93 ) ％/mm Hg,P ＞ 0.05 ].When patients in the condition of Hypercapnia,CRV in the severe and moderate OSAHS were also significantly lower than that in the control group [ ( 1.83 ±1.32) ％/mm Hg and (1.08 ± 1.00)％/mm Hg vs (3.32 ± 1.53)％/mm Hg,P ＜ 0.05),AHI was negatively correlated with the cerebrovascular reserve at the condition of hypercapnia and hypocapnia (r=-0.665,-0.721; P ＜ 0.05 ).Conclusion Inhaling CO2 is a effective method for assessing CVR.Cerebrovascular reserve capacity is associated with AHI.Reduced CVR causes hemodynamics change being severe hypoxia in the moderate and severe OSAHS.

Objective To explore the images and diagnostic evaluation of X-ray combined with ultrasound in paralytic intestinal obstruction caused by antipsychotic agents. Methods The data of X-ray and ultrasound of 124 cases of clinically diagnosed paralytic intestinal obstruction caused by antipsychotic agents were analyzed retrospectively, as well as their rates of confirmed diagnosis. All the 124 patients were examined by erect abdominal radiography and fluoroscopy,68 of the 124 patients by ultrasound. Results According to their typical images,the rate of X-ray confirmed diagnosis was 87.9%(109/124) with 15 missed diagnosis and the rate of missed diagnosis was 12.1%( 15/124);the rate of ultrasound confirmed diagnosis was 82.4%(56/68) with 12 missed diagnosis and the rate of missed diagnosis was 17.6%(12/68). There was no significant difference between X-ray and ultrasound (P＞ 0.05 ). Compared with X-ray or ultrasound ,X-ray combined with ultrasound in the diagnosis of paralytic intestinal obstruction could increase the rate of confirmed diagnosis (100.0% ,68/68),and decrease the rate of missed diagnosis (0),the difference was statistically significant (P＜ 0.05 ). Conclusions X-ray examination is the first choice to diagnose paralytic intestinal obstruction caused by antipsychotic agents,but ultrasound has the advantage of finding fluid in abdominal cavity. To reduce missed diagnosis, X-ray should be combined with ultrasound.

Objective To investigate the clinical features and the gene mutation of patients with spinocerebellar ataxia type3 and type7.Methods The trinucleotide repeat mutations were detected by polymerase chain reaction (PCR),agarose gel electrophoresis method,and DNA sequencing in 13 patients,4 related members and 4 common members from 3 spinocerebellar ataxia families.Results Among the 13 patients,four patients had SCA3/MJD(CAG) n expansion mutation(n = 65 ～ 74),nine patients had SCA7 allele expansion for 40 ～ 52 times.Patients with type 3 or 7 showed significant difference in nervous system injury.Conclusion The difference of clinical feature might be used in diagnosis of SCA3/MJD and SCA7,but genotype determination would be the only method of definite diagnosis.

Three-orientation medical talent training mainly include humanistic quality cultivation, professional quality and physical and mental quality. With professional ability as the guidance of profes-sional quality education requires students not only to grasp skilled medical technology, but also have the ability to enhance the medical technology. Based on the orientation of training target, this research mainly from habit set, authority set, set the multitude and empirical mind-set four aspects in this paper, the critical thinking, and put forward problems from finding problems, and expounds the innovative thinking of concise problem.

Teaching purpose, teaching content, experiment and examination forms etc. were discussed, and how to practice the teaching of the public selective course Nutriology of Traditional Chinese Medicine was pointed out. All these are invaluable experience for the development and progress of this course.

Objective To observe and investigate the therapeutic effect of thalidomide on gastrointestinal bleeding of angiodysplasia.Methods Eighteen patients with recurrent gastrointestinal bleeding of angiodysplasia were treated with thalidomide 100 mg daily for 4 months.Median follow-up time was 16.7 months.The changes of clinical setting and serum.vascular endothelial growth factor(VEGF)and tumor necrosis faetor-α(TNF-α)level between pre-therapy and post-therapy were compared.Results The clinical setting of patients in post therapy was significantly better than that in pre-therapy.The overall symptom score,the median bleeding frequency and median transfusion volume of patients after therapy was significantly lower than those before the therapy[(15.000±3.630)vs(5.330±3.325),(11.220±6.404)vs(1.000±1.237),(1422.22±1556.601)ml vs(100.00±240.098)ml,respectively,all P＜0.01],while median hemoglobin was obviously higher than that before the therapy[(5.950±1.656)g/ml vs(9.533±2.278)g/ml,P＜0.01].Serum VEGF and TNF-α levels decreased obviously after the therapy(118 pg/ml vs 58 pg/ml,116 pg/ml vs 34 pg/ml,P＜0.01).Conclusions Thalidomide can suppress the serum VEGF and TNF-α levels of the patients with recurrent gastrointestinal bleeding of angiodysplasia,then play a significantly role in preventing the rebleeding in patients with recurrent gastrointestinal bleeding of angiodysplasia.

BACKGROUND: Magnetic field can affect the growth and division of cancer cells both in vivo and in vitro, however, the effects on apoptosis of human liver cancer cells induced by magnetic field is still unclear.OBJECTIVE: To explore the inducing effect of extremely low fre quency (ELF) magnetic field on apoptosis of human liver cancer cell SK-HEP- 1.JESIGN: An open experiment with cells as the observational subjects.SETTING: Institute of Biotechnology, Shanghai Jiaotong University.MATERIALS: The experiment was carried out at the Institute of Biotechnology, Shanghai Jiaotong University from September 2004 to January 2005. The subject was human liver cancer cell line SK-HEP-1, purchased from cell bank of Chinese Academy of Science, Shanghai.METHODS: SK-HEP-1 cells were inoculated to T-flasks at the density of 2.0×107 cells L-1, and cultivated in the DMEM containing 0.1 volume fraction of heat-inactivated fetal bovine serum and 2 mmol/L L-glutamine. Exposure groups were exposed to 50 Hz, 20 mT magnetic field and the control groups were run concurrently under the same conditions with the exposed cultures but in a separate incubator which was free of magnetic field during 8-day culture process. The apoptosis of SK-HEP-1 cells were defined by DNA ladder assay, Hoechst 33258 staining and AO/EB staining respectively on day 8.MAIN OUTCOME MEASURES: ① DNA fragmentation pattern formation. ② The abnormal nucleus formation. ③ The percentage of apoptotic cells.RESULTS: ① Detection of internucleosomal DNA fragmentation by DNA ladder assay: After 8-day ELF magnetic field exposure, DNA fragmentation pattern was detected by DNA ladder assay, which was not observed in control groups (free of exposure). ② Fluorescence microscopy analysis of apoptosis by Hoechst 33258 staining: Hoechst 33258 staining was used to investigate the changes in the nucleus of cells, and many apoptotic bodies containing nuclear fragments were found in ELF magnetic field exposed cells, but just about none in untreated cells. At the same time, cytoplasmic shrinkage was observed in cells cultured under the exposure. And in some cells, even the cell membrane was unable to keep intact. ③ Fluorescence microscopy analysis of cell apoptosis by acridine orange/ethidium bromide (AO/EB) double staining: After ELF magnetic field exposure, the percentage of viable cells in exposure groups (9.2%) was rather low compared with the control groups (91.8%), and was accompanied with a high apoptotic rate (72.3%), while only 4.2% in control group. A large number of apoptotic cells were at the early stage of apoptosis. The rate of apoptotic cells (18.5%)after treated by magnetic field was higher than that of control group (4%). With the AO/EB double staining, control cells appeared to be round,intact and bright green while some of the exposed cells exhibited irregular cell morphology and condensed nucleus.CONCLUSION: Apoptosis of human liver cancer cell SK-HEP-1 could be induced by 50 Hz, 20 mT magnetic field in vitro.