A retrospective analysis of severe multiple trauma with secondary thrombocytosis / 中华急诊医学杂志

Objective To estimate the clinic features of severe multiple trauma with secondary thrombocytosis as a factor influencing the prognosis.Methods A retrospective single-center study was carried out in 680 patients with severe multiple trauma survived longer than 72 hours in Chongqing Emergency Medical Center from March 2010 through March 2013.The variables including age,gender,ISS (injury severity score),APACHE Ⅱ score,splenectomy and the usages of vasopressors,blood products transfusion,hematopoietic medicines and anticoagulant were analyzed.The prognosis indices including total in-hospital mortality after 72 hours,length of hospital stay and morbidity of thrombo-embolism were explored.The clinic characteristics and prognosis of severe multiple trauma with secondary thrombocytosis (platelet count more than 450 × 109 L-1) were evaluated.T test or rank sum test was used for comparison between measurement data and Chi-square test or Fisher' s exact test was used for comparison between enumeration data.Results Thrombocytosis was identified in 99 (14.56％) patients and it occurred one week after injury with median time of 27 days (ranged from 8 days to 304 days),and maintained for (18.62±4.38) d.The median of platelet count was 584 × 109 L-1 (lowest 478 × 109 L-1,highest 1 072 × 109 L-1) in severe multiple trauma patients with thrombocytosis.The proportions of splenectomy,prolonged use of vasopressors and employment of hematopoietic medicines or anticoagulant were significantly higher in patients with thrombocytosis than those in patients without thrombocytosis (14.14％ vs.7.06％,P=0.03;62.63％ vs.39.07％,P＜0.01; 28.28％ vs.6.71％,P＜0.01; 90.91％ vs.19.45％,P＜ 0.01).The highest D-Dimer level presenting in patients with thrombocytosis during the time of platelet increasing was significantly more common than that in patients of non-thrombocytosis group 7 days after trauma [(11.68 ± 11.90) vs.(5.05 ± 5.11),P =0.004].However,the mortality,length of hospital stay and morbidity of thrombo-embolism were not significantly increased in patients with thrombocytosis compared with patients without thrombocytosis [8.08％ vs.8.78％,P=0.82; 34 d (28.5,54.5) d vs.45 d (23,67) d,P =0.41; 10.10％ vs.10.50％,P =0.91].Conclusion There was a higher rate of secondary thrombocytosis in severe multiple trauma patients.The factors such as splenectomy,vasopressors,hematopoietic medicines and so on might induce the reactive thrombocytosis in trauma patients.Thrombocytosis might increase the incidence of thromboembolism in severe multiple trauma patients without appropriate prophylactic anticoagulation.For the sake of prophylaxis,employment of anti-platelet agent might be the appropriately therapeutic strategy for patients suffering from severe multiple trauma with secondary thrombocytosis accompanying risk factors of arterial thrombo-embolism.

A retrospective analysis of venous thromboembolism risk and prevention in critically ill patients / 中华急诊医学杂志

Objective To estimate the venous thromboembolism (VTE) risk and prevention in critically ill patients admitted to ICU and discuss the appropriate strategy for prevention.Methods A total of 276 critically ill patients staying longer than 48 hours in ICU were enrolled for a retrospective single-center study.VTE risk assessment,methods for mechanical and pharmacological prophylaxis and demographic data were recorded.Simplified Caprini scores for VTE risk were counted in the first day and 7th day after admission to ICU,and were compared among internal medicine,surgery and trauma subgroups.Relationship between VTE risk and the clinic index was analyzed by Pearson test and Spearman test with SPSS 17.0 software.The prophylaxis strategy applied to patients without low risk of VTE was explored.Results Simplified Caprini scores were (8.71 ± 4.90) and (9.24-± 5.30) on the first day and the 7th day after admission respectively.Simplified Caprini score was significantly related to APACHE Ⅱ score (r =0.397,P =0.027).Meanwhile,simplified Caprini score in surgical and traumatic patients was higher than that in medical ill patients (14.02 ±2.01),(14.5 ± 1.29) vs.(6.55 ±3.98),P ＜0.01.The total rate of early prophylaxis measures used with mechanical prevention (13.43％) and pharmacological prophylaxis (5.22％) was only 18.28％ within 48 hours after admissioin of patients with highest riskof VTE.Even on the 7th day after admission to ICU,the total rate of prophylaxis measure employed with mechanical prevention (11.92％) and pharmacological prophylaxis (11.56％) for VTE was 25.83％.Conclusions Critically ill patients in ICU were subjected to extremely high risk of VTE.The VTE risk related closely to the severity of critically illness existed throughout the whole period of the ICU stay.Constant assessment for VTE risk and bleeding risk should be made with frequent assessment for critically ill patients.

The role of intraleisonal pingyangmycin in the treatment of maxilla and facial venous malformation / 西安交通大学学报(医学版)

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.

Functional reconstruction with tissue engineered myoblast in facial muscle of rat / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this article is to discuss the reconstruction of facial muscle defects with tissue engineered myoblast in SD rats.</p><p><b>METHODS</b>Using purified, subcultured myoblast of neonatal rats and type I collagen gels as extracellular matrix (ECM) and scaffold, tissue engineered muscle was transplanted in the face of syngeneic nutured rats.</p><p><b>RESULTS</b>Tissue engineered myoblast generated and differentiated in vitro were observed with microscope. Myoblast fused each other and formed myofibers in the face of rats, nerve fibers and vessels regeneration could also be found in some samples. Postoperative electromiographs showed the myofibers were active when stimulating the nerve trunk that innervates the engineered facial muscle.</p><p><b>CONCLUSION</b>Tissue engineered method is hopeful to be used as a new technique to reconstruct defects of facial muscle.</p>

Clinical application of anticancer nanoparticles targeting metastasis foci of cervical lymph nodes in patients with oral carcinoma / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The aim of this study was to investigate the target delivery of Cucurbitacin BE (CuBE) to cervical lymph nodes by peri-oral-cancer submucosal injection of the average diameter 85 nm Cucurbitacin BE poly-lactic acid nanoparticles (CuBE-PLA-NP) and evaluate its clinical therapy efficacy.</p><p><b>METHODS</b>CuBE and CuBE-PLA-NP were respectively injected into peri-oral-cancer submucosa at 2, 12, 24, 48, 72, 96, 120, 144, 168 and 192 hours before operation in 26 patients with oral cancer. The concentrations of CuBE in cervical lymph nodes and blood were measured by high performance liquid chromatography (HPLC) at every time point. Cancer cell degeneration and necrosis in metastasis foci of cervical lymph nodes were observed using light microscope and electron microscope.</p><p><b>RESULTS</b>(1) The CuBE concentrations in cervical lymph nodes after CuBE-PLA-NP injection were far higher than those after CuBE injection at every time point, the duration of CuBE existing in the cervical lymph nodes in CuBE-PLA-NP group was far longer than those in CuBE group, the area under the CuBE concentrations-time curve of the cervical lymph nodes in CuBE-PLA-NP group was 43.67 times as many as that in CuBE group; (2) The CuBE ratio of maximum concentrations in the cervical lymph nodes in CuBE-PLA-NP group was 106.46 times as high as that in CuBE group; (3) The CuBE concentrations in the blood in CuBE-PLA-NP group was far lower than that in CuBE group; (4) Cancer cell necrosis and degeneration in the metastasis foci of cervical lymph nodes were found in CuBE-PLA-NP group, necrosis and degeneration were not found in CuBE group.</p><p><b>CONCLUSION</b>The peri-oral-cancer submucosa injection of the average diameter of 85 nm CuBE-PLA-NP can specifically delivery CuBE to the cervical lymph nodes, enhance treatment efficiency, and reduce general toxicity.</p>

The study of cucurbitacin BE polylactic acid nanoparticles delivering cucurbitacin BE to metastasized cervical lymph nodes in mice with oral cancer / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The aim of this study was to investigate the delivery of Cucurbitacin BE to cervical lymph nodes by peri-cancer submucosal injection of the average diameter 85 nm Cucurbitacin BE polylactic acid nanoparticles (CuBE-PLA-NP).</p><p><b>METHODS</b>Cervical lymph node metastasis model of mice oral cancer was established and CuBE-PLA-NP and CuBE were injected in peri-cancer submucosal of the mice respectively, the concentration in blood, heart, liver, spleen, lung, kidney and cervical lymph node were measured by high performance liquid chromatography at fifteen time points, Targeted cervical lymph nodes were evaluated by targeting index, selectivity index, targeting efficiency, relative targeting efficiency and ratio of maximum concentration.</p><p><b>RESULTS</b>(1) The CuBE concentration in the cervical lymph nodes after CuBE-PLA-NP injection was far higher than that after CuBE injection at every time point, the CuBE duration in the cervical lymph nodes in CuBE-PLA-NP group was far longer than that in CuBE group; (2) The five targeted values of the cervical lymph nodes in CuBE-PLA-NP group was far higher than that in CuBE group; (3) The CuBE concentration in blood, heart, liver, spleen, lung and kidney in CuBE-PLA-NP group was far lower than that in CuBE group.</p><p><b>CONCLUSION</b>The CuBE-PLA-NP can specifically deliver CuBE to the cervical lymph nodes by peri-cancer submucosal injection, increase CuBE concentration and duration in metastasized cervical lymph nodes, and decrease drug concentration of other organs.</p>

Study on drug release after arterial embolism with cisplain-loaded albumin microspheres in treating carcinoma of tongue / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this study was to investigate the cisplatin release in peripheral blood and tumor tissue after cisplatin-loaded albumin microspheres (CDDP-AMS) were infused through lingual artery for treating carcinoma of tongue.</p><p><b>METHODS</b>Anticancer agent cisplatin was encapsulated with biodegradable and non-antigenic albumin. The cisplatin-loaded albumin microspheres, which were 56.3 microns in diameter, were used for treating 7 patients with squamous carcinoma of tongue by infusing through lingual artery. The cisplatin in peripheral venous blood and carcinoma tissue were measured for analyzing the drug release in vivo.</p><p><b>RESULTS</b>Concentration of the drug in peripheral venous blood increased to the highest level in 90 minutes after CDDP-AMS was infused through lingual arterial and still could be detected until 10th day. The cisplatin concentration in tumor tissue kept considerably stable and could be detected until 17 days.</p><p><b>CONCLUSION</b>CDDP-AMS had the effect of controlled release in vive. Effective and steady local drug concentration played the role of killing tumor cells, the low concentration in peripheral blood reduced the side effects of cisplatin to minimum as well. It is concluded that CDDP-AMS is a useful and recommendable method for treating the carcinoma of tongue.</p>

Basic research on neck dissection with external jugular vein and cervical plexus preserved / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The aim of this study was to investigate the effects of preserving external jugular vein and cervical plexus in reducing intra-cranial pressure, face swelling as well as in avoiding shoulder arm syndrome in neck dissection.</p><p><b>METHODS</b>20 patients with oral cancer were divided into two groups. The facial interstitial pressure was examined before and after neck dissection and lymph tubes were stained by immunochemical techniques.</p><p><b>RESULTS</b>The degree and lasting time of the increase of facial interstitial pressure in group with external jugular vein and cervical plexus preserved was lower than that in control group. The density of lymphatic tubes around the internal jugular vein, accessory nerve and sternocleidomastoid muscles was much higher than that around the external jugular vein and cervical plexus.</p><p><b>CONCLUSION</b>Preserving external jugular and cervical plexus during radical treatment is effective not only in reducing the intra-cranial pressure and face swelling, but also in preventing shoulder arm syndrome.</p>

The effect of gene transfection of vascular endothelial growth factor-C on the metastasis ability of Tca8113 / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the role that vascular endothelial growth factor-C plays in the lymph node metastasis of the squamous cell carcinoma (SCC) of tongue.</p><p><b>METHODS</b>An established VEGF-C transfected Tca8113 cell strain (VcTca) was heterotransplanted into BALB/C nude mice subcutaneously. The expression of VEGF-C and VEGFR-3 was detected. The property of tumorigenesis and metastasis of the transfected cell was investigated.</p><p><b>RESULTS</b>Jugular lymphatic metastases developed in 4/6 mice of VcTca group in 6 weeks after transplantation, while no lymph node metastasis was found in mice with tumors of non-transfected Tca8113 cell (Tca) and mock transfected cell(pDTca) at the same time. There was no difference in tumor weight among VcTca, pDTca and Tca (P > 0.05).</p><p><b>CONCLUSION</b>It is suggested that VEGF-C could promote lymph node metastatic ability of Tca8113 cell, and could be utilized as a target of new regimen in prevention and treatment for lymphatic metastasis of oral carcinomas.</p>

The effect of deep branches of cervical nerve on motorial function of trapezius muscle / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The aim of this study was to examine the effects of deep branches of cervical plexus on trapezius muscle.</p><p><b>METHODS</b>The evoked electromyography of 32 trapezius of 16 SD rats was examined in different time and results obtained were processed by statistical methods.</p><p><b>RESULTS</b>After cutting the accessory nerves, stimulating the deep branches of cervical plexus evoked the myoelectricity, the myoelectricity results varied according to different time.</p><p><b>CONCLUSION</b>The deep branches of cervical plexus are another important motorial supply to trapezius muscles. After cutting the accessory nerves, if the branches were undamaged, the shoulder's function would be greatly preserved.</p>

The regulation of nm23-H1/NDPK-A in different processes of regional lymph node metastases of oral squamous cell carcinomas / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the regulation and effect of the expression of nm23-H1 gene in different processes of regional lymph node metastases of oral squamous cell carcinomas(OSCC).</p><p><b>METHODS</b>By immunohistochemical analysis in 200 paraffin-embedded tissues of OSCC and Western Blot in 9 fresh tissues of OSCC using a monoclonal antibody, the expression of nm23-H1/NDPK-A were detected in dividing groups accompanied with the clinical and pathological data of cervical lymph node metastases and modes of invasion.</p><p><b>RESULTS</b>The rates of negative expression of nm23-H1/NDPK-A had significant differences between metastatic cases(34/81) and non-metastatic cases(15/119). The nm23-H1/NDPK-A negative group showed higher frequency of lymph node metasteses (P < 0.01). In the different metastatic processes, There were significantly differential expressions of nm23-H1/NDPK-A among stage N0, N1 and N2(P < 0.01), distinct involved quantities of lymph nodes (P < 0.01), dissimilar metastatic involved levels(P < 0.05), definite modes of invasion(P < 0.01) and different cell differentiations(P < 0.01). There were much higher negative expressions in those cases of N1 stage(23/38), only one lymph node to be involved(23/39), metastasized to submandibular nodes or/and superior deep cervical nodes(17/28 and 12/29, respectively), IV c types of invasion(33/54) and poor differentiations(9/19).</p><p><b>CONCLUSION</b>The results indicated that nm23-H1/NDPK-A played an more important role in switching the initial metastases formation than in influencing the later metastases spread because the negative expressions of nm23-H1/NDPK-A in solid tumors of OSCC would induce the formation of high metastatic cellular subpopulations. It was also confirmed that nm23-H1 gene might be a metastatic suppressor and may be useful in predicting the initial lymph node metastases in OSCC.</p>

Cloning and sequencing of human vascular endothelial growth factor-C encoded cDNA / 华西口腔医学杂志

<p><b>OBJECTIVE</b>A functional VEGF-C cDNA was cloned from a patient with squamous cell carcinoma (SCC) of tongue in order to study the important role of vascular endothelial growth factor (VEGF)-C in lymphatic dissemination of malignancies in gene level.</p><p><b>METHODS</b>RT-PCR was employed to clone the human VECF-C encoded cDNA from a surgical specimen of a lingual SCC patient. Then it was subcloned into plasmid vector pCRII and sequenced.</p><p><b>RESULTS</b>A 1.1 kb human VEGF-C cDNA fragment was amplified from the lingual SCC. The sequencing results of the fragment demonstrated that it had 99.6% similarity with the reported human VEGF-C cDNA (representing the 559-1,611 bp according the sequence of Genbank Entry X94216).</p><p><b>CONCLUSION</b>An encoded fragment VEGF-C cDNA was successfully cloned from a lingual SCC and provided a necessary material for further study.</p>

Prokaryotic expression of vascular endothelial growth factor-C / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate whether the vascular endothelial growth factor (VEGF)-C cDNA which cloned from a patient with squamous cell carcinoma (SCC) of tongue can encode a functional protein or not.</p><p><b>METHODS</b>RT-PCR was employed to clone the functional VEGF-C fragment from the surgical specimen of a lingual SCC patient. Then it was subcloned into expressive plasmid vector pBKCMV, which was transfected into E. coli to examine its expression.</p><p><b>RESULTS</b>A truncated human VEGF-C cDNA fragment was amplified from the lingual SCC. The sequencing results of the fragment demonstrated that it had 99.6% similarity with the reported human VEGF-C cDNA (representing the 559-1611 bp according the sequence of Genbank Entry X94216). Induced with IPTG, the E. coli XLI-Blue MRF' containing the recombinant pBK-VEGF-C expressed a 56,000 fusion protein, which can be recognized by polyclonic anti-human VEGF-C antibody.</p><p><b>CONCLUSION</b>A functional fragment VEGF-C cDNA was cloned from a lingual SCC. It will promote more intensive research on the function of VEGF-C and its relationship with metastasis of oral SCC.</p>

The pathologic basis of partial parotidectomy in parotid pleomorphic adenoma treatment / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this study was to offer pathological reasons for partial parotidectomy adopted in parotid pleomorphic adenoma treatment.</p><p><b>METHODS</b>Continuous slices from 25 cases of primary parotid pleomorphic adenoma were carefully examined and the extra-envelope infiltration, the budding and the primary multi-center were measured and recorded.</p><p><b>RESULTS</b>The range of extra-envelope infiltration and budding was limited in 0.09-0.285 mm out of tumor capsules, which was far less than the safe boundary(1 cm) of the partial parotidectomy. Two cases with multi-centers were found, but all the centers were aggregated together and encapsulated in a united envelope.</p><p><b>CONCLUSION</b>Partial parotid parotidectomy is a safe method and can remove the tumor completely in parotid plemorphic adenoma treatment.</p>

A study of effects of pingyangmycin injection on treatment of lymphangiomas in oral, maxillofacial and cervical regions / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this study was to investigate the indication and therapeutic effects of Pingyangmycin injection as a primary therapy of lymphangiomas in oral, maxillofacial and cervical region.</p><p><b>METHODS</b>A total of 195 patients (106 males and 89 females) with lymphangiomas in oral and maxillofacial regions were treated in the affiliated dental hospital of Sichuan University from May 1990 to December 2000. The patients' ages ranged from 0.5 to 46 years. The tongue was the most commonly involved site, followed by the cheek and the neck. The 200 lymphangiomas (5 patients had 2 lymphangiomas in different sites) underwent the therapy of Pingyangmycin, which was injected as with 1 mg/ml in saline. The total dose of Pingyangmycin ranged from 5 mg to 70 mg and 5 to 58 times, 1 time per 2-4 weeks.</p><p><b>RESULTS</b>The curative rate of cystic-type lymphangiomas was the highest. Of the 51 cystic lymphangiomas, 110 capillary lymphangiomas, 18 cavernous lymphangiomas and 21 combinations of capillary and cavenous lymphangiomas, the curative rates were respectively 100% (51), 46.36% (51), 16.16% (3) and 19.05% (4), which showed a significant therapeutic effect, respectively. And 40(78.43%), 19(17.27%), 2(11.11%) and 0(0%) of them completely disappeared. There was no serious side effect with Pingyangmycin-injection treatment, such as pulmonary fibrosis.</p><p><b>CONCLUSION</b>The treatment of injection of Pingyangmycin is a selective primary method of lymphangiomas, which can reduce the size of lymphangiomas, and make them completely disappeared.</p>

The cloning and sequencing of H-2Kk gene cDNA of 615 mice / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purposes of this study were to clone and sequence the major histocompatibility complex type I (MHC I) molecular antigen recognizing gene (H-2Kk) of 615 mice, and to provide the functional gene for transgenic therapy.</p><p><b>METHODS</b>The 1.4 kb full-length fragment of H-2Kk gene complementary DNA (cDNA) was amplified from the total RNA of 615 mouse liver by using reverse transcription polymerase chain reaction (RT-PCR). The cDNA was inserted into PGEM3Zf(+) vector directionally, and the competent E. coli JM109 was transformed with the ligated product. The recombinant PGEM3Zf(+)-H-2Kk cDNA plasmid was obtained using restricted enzyme analysis of the transfectants. The complete sequence of 615 mouse H-2Kk cDNA was determined by using Sanger's method.</p><p><b>RESULTS</b>The sequences of 615 mouse H-2Kk cDNA were 99% similar with those of H-2Kk cDNA which were reported by other researchers, and the sequences encoding antigen recognizing regions (ARS) were identical with each other.</p><p><b>CONCLUSION</b>The authors cloned the MHC I molecular antigen recognizing gene (H-2Kk) of 615 mice successfully and got the functional gene of MHC I.</p>

The utility of vascularized free fibula flap in mandibular reconstruction: a clinical report of 25 cases / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The purpose of this study was to evaluate the advantages and disadvantages of vascularized free fibula flap as a new method for mandibular reconstruction.</p><p><b>METHODS</b>25 cases (17 male to 8 female) who have received mandibular reconstruction with free vascularized fibular flaps in our hospital were studied retrospectively. The average length of the fibula grafts is 10.0 cm (range from 5.5 to 16 cm). 3 cases received primary insertion of osteointegrated dental implants into the free fibula flap, and all these 5 implants survived.</p><p><b>RESULTS</b>All flaps except 1 were viable. 62% of the cases took normal diet postoperatively, and the remainder took soft diet as well. All patients spoke clearly. No ankle unstability was reported. And the aesthetic assessments in all patients were good or fair.</p><p><b>CONCLUSION</b>Vascularized free fibular flap takes its distinct advantages to other autogeneous free bone flaps and is confirmed to be one of the optimal methods for mandible reconstruction by our study.</p>

Application of carboplatin-activiated carbon particle delivery system in the treatment of oral carcinoma and its cervical metastasis / 实用口腔医学杂志

?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.

Experimental study on inducing apoptosis of tumour cells by protamine inhibiting angiogenesis / 中国癌症杂志

Purpose:To study the therapeutic mechanism through inducing apoptosis of tumour by protamine inhibiting angiogenesis . Methods:The vascular density and apoptotic index(AI)in the tumour were investigated by immunohistological and Tunel(terminal deoxynucletidy1 transferase-mediated dU TP nick end-labelling) methods in animal tumour model with experimental treatment. Results:The vascular density of tumour was much lower in controls. Apoptosis appeard in the treated group and AI is (7.67?1.70)%. Conclusions:Protamine could reduce the vascular density of tumour very much and induce the apoptosis of tumour cells. The therapeutic effects were achieved by inhibiting angiogenesis and inducing apoptosis of tumour.

A preliminary study on the proliferation of endothelial cells of human hemangioma / 实用口腔医学杂志

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.