From April.1993 to Jan.1994,transcatheter maxillary arterial chemoem- bolization using Cisplatin microspheres(DDP-ms)in combination with PBF(DDP,BLM,5- Fu)had been used in 14 cases with regional relapsed nasopharngeal carcinoma and 3 cases of untreated locally advanced nasopharngeal carcinoma got positive response.The result showed 2 patients with Cr,13 PR,1MR and 1 NC advanced cases with PR.The total suc- cessful rate(CR+PR)was 88 24%(15/17),In addition,the main toxicity and coplicaton had been discussed.

For the purpose of expanding the analysis scope of medicines,a RPHPLC assay procedure has been established for quantitative analysis of indomethacin in human plasma.Analytical column was YWG C18(?4 6 mm?200mm).Mobile phase was methanol water acetic acid solution(67∶33∶0 1)(v/v) and wavelength of detector was 254nm.The linear relationship,precision,method of extraction and recovery were comparatively investigated by standard blank human plasma spiked with indomethacin.Indomethacin leved in the blood of the healthy volunteers was detected by using this method.The linear range of the method was 0 1～5 0?g?ml -1 .The calibration curve was linear (?=0 9995). The detection limit was 0 02?g?ml -1 (S/N≥3) and the recovery of indomethacin in human blood was between 97 5%～104 2%. Intra and inter day prccision of the mothod were(1 1?0 2)%(n=4) and(2 7?0 6)%(n=4)respectively.The CV% were no more than 3 0% (n=4).The method shows a high sensitivity,precision,fast and excellent selectivity.Thus it is suitable for investigation of the indomethacin in human blood and its toxicological analysis as well as the pharmacokinetic study.

=3) in spinal fluid. The intra and inter-day relative standard deviation of analysis were less than 3.0 % (n = 5). The recovery of lidocaine was between 98.3 % - 102.7 % . Lidocaine assay was carried out in a medical case by using the method established. Conclusion Spinal fluid is suitable for assay lidocain in forensic toxicological analysis and other medical studies by using the HPLC method which is sensitive, rapid and accurate.

Objective For purpose of meeting the requirement of forensic toxicological investigation, a RPHPLC method was established for simultaneous determining lidocaine and bupivacaine in human spinal cord pretreated with formaldehyde. Method Analytical column was YWG-C18 (4.6mm?150mm) and a per column. Mobile phase was CH3OH:0.015M NaH2PO4 =75:25 (v/v) pH = 7.2. The wavelength of detection was 210 nm. The pretreatment method of sample, detection condition, linear range, precision and recorery of the method were systematically investigated by using blank spinal cord spiked with standard lidocaine and bupivacaine. Results The linear range was 0.5 ~ 10.0?g.g-1 (lidocaine: r=0.9999; bupivacaine: r = 0.9998). The detection limit of lidocaine was 15ng and of bupivacaine 20ng (S/N≥3). The intra and inter day precision of assay of lidocaine and bupivacaine were less than 4.3% (n=5). Both lidocaine and bupivacaine have been detected in a forensic toxicological analysis case by using this method and the result was correct. Conclusion Lidocaine and bupivacaine can determined in human spinal cord pretreat-edwith formaldehyde by HPLC. The method is simple, useful and accurate. It can be applied in the forensic toxicological analysis investigation and other medical studies.

Objective Develop a reversed-phase high performance liquid chromatography (HPLC) methodfor detecting isoniazid in vitreous humor and spinal fluid.Method Vanillin, as a derivative reagent, was added to the vitreous humor and spinal fluid samples. Isoniazid and vanillin reacted to form isonicotinoyl hydrazone which was separated and detected. The pretreatment method of sample, the linear range, the precision, the recovery of isoniazid were all established by using rabbit's vitreous humor and spinal fluid spiked with standard isoniazid. The HPLC method has then been applied to investigate the concentration of isoniazid in intoxicated rabbits'vitreous numor and spinal fluid respectively.Results As established in the method, the linear range was 0.2?g/ml～12.0?g/ml (for vitreous humor ?=0.9990, for spinal fluid ?=0.9988). The detective limit was 0.2?g/ml. The intra and inter-day precision of assay for isoniazid were less than 4.9%( n =5) in vitreous numor and spinal fluid. The average recoveries of isoniazid were more than 97.1%. The concentration of isoniazid was 74.60?7.40?g/ml in vitreous humor, 88.95?10.12?g /ml in spinal fluid.Conclusion The HPLC method is suitable for analyzing isoniazid in the vitreous numor and spinal fluid.

Objective To develop a method for the determination of ganciclover in human plasma by RPHPLC.Methods Plasma containing ganciclover was extracted with methanol and methylene chloride,qualitative and quantitative analysis was carried out directly.Working curve,linear range,recovery,precision and so on was obtained according to the sample pre-processing method and analysis state.The HPLC method has been taken to investigate the plasma concentration of ganciclover for 12 volunteers.Results The relationship of the peak area of ganciclover concentration in plasma linear within the range of 0.05 μg/mL～1.60 μg/mL(r=0.9999).The lowest detection limit was 0.01 μg/mL(S/N≥13).The intra and inter-day RSD were less than 5.1%respectively.The recovery is about 90.0%～95.4%.Conclusion The established method in the article was shown to be sensitive,accurate and simple for the determination of ganciclover level.It is suitable for clinical detection of ganciclover and forensic medicine and toxicology analysis.

Adolescent ; Antigens, CD34 ; metabolism ; Bone Neoplasms ; diagnostic imaging ; metabolism ; pathology ; Chondrosarcoma, Mesenchymal ; metabolism ; pathology ; Diagnosis, Differential ; Hemangiopericytoma ; diagnostic imaging ; metabolism ; pathology ; Humans ; Male ; Platelet Endothelial Cell Adhesion Molecule-1 ; metabolism ; Sarcoma, Synovial ; metabolism ; pathology ; Tomography, X-Ray Computed ; Vimentin ; metabolism

The aim of this paper is to report the synthesis of the mPEG-PCL-g-PEI copolymers as small interfering RNA (siRNA) delivery vector, and exploration of the siRNA delivery potential of mPEG-PCL-g-PEI in vitro. The diblock copolymers mPEG-PCL-OH was prepared through the ring-opening polymerization. Then, the hydroxyl terminal (-OH) of mPEG-PCL-OH was chemically converted into the carboxy (-COOH) and N-hydroxysuccinimide (NHS) in turn to prepare mPEG-PCL-NHS. The branched PEI was reacted with mPEG-PCL-NHS to synthesize the ternary copolymers mPEG-PCL-g-PEI. The structure of mPEG-PCL-g-PEI copolymers was characterized with Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). The mPEG-PCL-g-PEI/siRNA nanoparticles were prepared by complex coacervation, and the nanoparticles size and zeta potential were determined, separately. The cytotoxicities of mPEG-PCL-g-PEI/siRNA nanoparticles and PEI/siRNA nanoparticles were compared through cells MTT assays in vitro. The inhibition efficiencies of firefly luciferase gene expression by mPEG-PCL-g-PEI/ siRNA nanoparticle at various N/P ratios were investigated through cell transfection in vitro. The experimental results suggested that the ternary (mPEG5k-PCL(1.2k))1.4-g-PEI(10k) copolymers were successfully synthesized. (mPEG(5k)-PCL(1.2k))1.4-g-PEI(10k) could condense siRNA into nanoparticles (50-200 nm) with positive zeta potential. MTT assay results showed that the cytotoxicity of (mPEG(5k)-PCL(1.2k))1.4-g-PEI(10k)/siRNA nanoparticles was significantly lower than that of PEI(10k)/siRNA nanoparticles (P < 0.05). The expression of firefly luciferase gene could be significantly down-regulated at a range of N/P ratio from 50 to 150 (P < 0.01), and maximally inhibited at the N/P ratio of 125. The mPEG-PCL-g-PEI polymers could delivery siRNA into cells to inhibit the expression of target gene with very low cytotoxicity, which suggested that mPEG-PCL-g-PEI could serve as a new type of siRNA delivery vector.

Objective To investigate role of reverse digital artery island flap combined with dig- ital nerve end to side anastomosis.Methods Reverse digital artery island flaps were used for recon- struction of 65 fingertip defects in 57cases,in which the restoration of the flap sense was attained via dig- ital nerve end to side anastomosis.Results After primary repair,all flaps survived,with good appear- ance and wear-resisting as well as satisfactory two-point discriminations.Conclusion Digital artery re- verse island flap combined with digital nerve end to side anastomosis is a simple and effective procedure for repair of finger defect.

Objective To discuss the clinical features diagnosis and treatment of cerebral schistosomiasis. Methods A to?tal of 166 patients with cerebral schistosomiasis were treated and their clinical data were collected and analyzed retrospectively. Results In 166 cases of cerebral schistosomiasis the confirmative diagnoses of 156 cases were diagnosed according to the clin?ical manifestation etiology immunology and auxiliary examination CT MRI .In among 74 cases were confirmed by pathologi?cal examination 10 cases were diagnosed through to the diagnostic treatment. Totally 102 patients received the oral medication of praziquantel and they all improved and discharged 14?16 days later 64 patients received the craniotomy and praziquantel medication after the operation and 48 patients significantly improved others did not improve or aggravated. There was no opera?tive mortality. Conclusions Neuroimaging and laboratory tests are valuable in the diagnosis of cerebral schistosomiasis. The praziquantel treatment is selected firstly when the diagnosis was established. However in the case of serious intracranial hyper?tension intractable epilepsy and praziquantel treatment fails the surgical treatment is required.