Objective: To evaluate the distribution and degradatio n of albumin microspheres (AMS) with average diameter of 56.3 ?m injected into jugular external artery.Methods: 125 I labeled AMS we re injected into rabbit's jugular external artery. The radioactive amount of loc al tissue and internal organs was measured. 760 ml/L urografin angiography was e mployed to observe the re opening of embolized vessels after AMS infusion of e xternal jugular artery in 5 dogs. Results: The AMS was mai nly concentrated in the target area (92.23%) after injection. The micro artery was obviously embolized by AMS and re opened in 7～9 days. Conclusio n : The AMS can be used as the drug bearer with delayed releasing eff ection.

s Objective:To study the expression of nucleolar orga ni zer region associated protein (Ag NORs) of T lymphocytes in the patients with tumor of salivary gland. Methods:The expression of Ag NORs of T lymphocytes in 60 normal adults, 56 patients with benign salivary gla nd tumor and 45 patients with malignant salivary gland tumor was analysed by Ag stainning and KL imaging system. Results: The ratio of Ag NORs positive area to nuclear area of T lymphocytes in normal adults,pati ents with benign tumor and those with malignant tumor were 7.88?0.10, 5.71?0.1 3 and 4.21?0.12 respectively ( P

Objective: To study the role of simian virus 40 large T antigen(SV40LTag) and telomeras in the proliferation of endothelial cells in hemangioma. Methods: The expression of SV40LTag was examined in 100 cases of hemangioma with immunohistochemistry, telomerase activity and telomeric length were measured by RT-PCR based telomeric repeat amplification protocol(TRAP) assay, telomeric restriction fragment (TRF) analysis and chemiluminescence in situ hybridization in 50 cases of hemangioma and 10 of squamous cell carcinoma. A sample of embryonic kidney endothelia was used as the contrdol. Results: SV40LTag expression was observed in 45 out off the 100 cases of hemangioma. Telomerase expression was found in 27 out off the 50 cases of hemangioma and all the 10 of squamous cell carcinoma. The telomeric length in hemangioma varied from 6.8 to 13.2 kb, 10.5-13.5 kb in squamous cell carcinoma and 12.4 kb in embryonic kidney endothelia. Conclusion: Transformation of endothelia by simian virus 40 may contribute to the occurring of hemangioma, telomerase may play a role in the proliferation of the endothelial cells in hemangioma.

砄bjective: To seek for the method of reinnervation of denervated pectoralis major myoflap. Method:The model of pectoralis major myoflap transposition in 20 New Zealand rabbits was used. After the myoflaps were transferred (original nerve innervation,ON) and ON denervation followed by hypoglossal genioglossus muscle neuromuscular pedicle implantation (NMP) wre performed. The flaps were examined at the intervals of 4,8,12 and 16 weeks respectively after operation. Results:In NMP myoflaps contracted when the hypoglosal nerve was stimulated,some type Ⅱ fibers in the myoflaps transformed into type I, but the pattern of distribution of the muscle fibers displayed mosaic and was similar to that of genioglossus muscle. Conclusion:The denervated pectoralis major myoflap can be reinnervated by hypoglossal-genioglossus muscle neuromuscular pedicle transplantation.

Objective:To establish a tongue cancer cell line that stably overexpresses nm23-H1.Methods:The reconstructed plasmid, pCMV-BamH1-Neo-nm23-H1, was transfected into bacteria and amplified. The plasmid was identified by electrophoresis on a 10 g/L agarose gel and stained with ethidium bromide and then transfected to the cell line of Tca8113 by lipofectin strategy and was selected by G418 for 5 weeks. The stable expression of nm23-H1 was identified by immunofluorescence,Western-blotting and flow cytometer.Results:Restriction endonuclease Bam H1 examination showed that 986 bp of nm23-H1 was in pCMV-Bam-Neo vector. 5 weeks after transfection positive clones were obtained and the transfected cells were proliferated to confluent.Immunohistochemical examination,Western blot and flow cytometry showed that nm23-H1 expression was increased in the transfected cells.Conclusion:A tongue cancer cell line expressing nm23-H1 is established.

?Objective: To estimate the effect of carboplatin activiated carbon particle delivery system (CP CH) in the treatment of oral carcinoma and its cervical lymph node metastasis. Methods: CP CH was prepared by absorption of carboplatin with activated carbon particles and injected into the submucosa around the tumors 72 h before operation in 6 patients with tongue or buccal squamous cell carcinoma (SCC) and metastasis in cervical lymph nodes,then extensive tumorectomy with neck dissection was conducted. The specimens of lymph nodes,primary carcinoma and blood were analyzed by microscope and plasma emitting spectrometry. Results:60 out of 70 (83.33%) lymph nodes obtained from the CP CH treated cases were found to be stained black by carboplatin.The carboplatin concentrations in lymph nodes and blood were (23.36 ?2.58) ?g/g and (1.76?0.32) ?g/ml respectively.Necrosis and degeneration were observed in SCC tissue.Conclusion:CH CP may be effective in the treatment of oral SCC with cervical lymph metastasis by providing high concertration and long lasting carboplatin in the lessions.

Objective To explore the role of intraleisonal pingyangmycin in the treatment of maxilla and facial vascular malformation.Methods A total of 160 cases with vein malformation were divided into two groups randomly,and were injected pinyangmycin and sod morrhuate,respectively.Results The size of the swelling reduced by 50% or more in 74 patients(92.5%) and by 75% or more in 64 patients(80%) in pinyangmycin group;the size of the swelling reduced by 50% or more in 50 patients(62.5%) and by 75% or more in 34 patients(42.5%) in sod morrhuate group;there was a significant difference in the two groups.Conclusion Intralesional injection of pinyangmycin is an easy,safe,and effective therapeutic method in venous malformation.

Objective To study the mechanism of increased sensitivity to cisplatin by nm23-H1.Methods The plasmid,pCMV-BamH1-Neo-nm23-H1,was transfected to cell line Tca8113 by lipofection strategy and was selected by G418 for 5 weeks.The stable products of nm23-H1 gene were identified by Immunohistofluorescence and Western-blotting.Using MTT and flow cytometer,we detected the changes of cell mortality rate,apoptosis and mitochondrial membrane potential.Results We successfully established the cell line of stable overexpression of nm23-H1.In vitro,the cell mortality rate and apoptosis were increased significantly in stable expression cell line of nm23-H1,compared with those in Tca8113 cell line of non-transfection;this effect could be inhibited by oubain which is an inhibitor of Na(+)/K(+)-ATPase.Mitochondrial membrane potential was decreased significantly in stable expression cell line of nm23-H1.Conclusion Nm23-H1 can increase the sensitivity of cisplatin on Tca8113 cell line;The mechanism may be the mitochondrial membrane potential is decreased by nm23-H1 so that intracellular platinum are increased to finally cause the apoptosis and necrosis of cells.

Objective: To analyze the effects of treatment of squamous cell carcinoma of tongue with N 0. Methods: 145 cases of squamous cell carcinoma of tongue with N 0 were retrospectively reviewed.22 cases underwent resection of primary tumor without elective neck dissection (END) (control group).123 cases underwent resection of primary tumor with END (END group).Follow-up was carried out for more than 3 years or till the death of patients.Results:Lymph node metastases was indentified in 33 patients in END group after operation and in 4 in control gruop during follow-up.The total occult lymph node metastases was found in 25.52% of the patients.4 (18.18%) died from neck or lung metastasis in control group and 7 (5.69%) in END group (P

0.05). ALP activity of the cells on deproteinized bone was higher than that on decalcified bone(P