OBJECTIVE:To prepare Compound benzocaine film and optimize the formulation. METHODS:Compound benzo-caine film was prepared with the base materials of polyving akohol-1788 (PVA) and sodium carboxymethyl cellulose (CMC-Na). With the factors of amounts of the base materials PVA and CMC-Na and the additives glycerol and polysorbate 80,and the indexes of the average of the cumulative release rates (0.25 h and 2 h) of the main drugs benzocaine (BZ) and dexamethasone acetate (DA),the orthogonal experiment was conducted to optimize the formulation,and then the optimal formulation was verified. HPLC was adopted to determine the contents of BZ and DA in the preparation for the calculation of cumulative release rates. RESULTS:The optimal formulation was as follows as PVA of 1.2 g,CMC-Na of 1.2 g,glycerol of 1.6 g, polysorbate 80 of 1.5 ml. The con-tents of BZ and DA in the single film prepared respectively were 21.607 mg(RSD=0.71%,n=6)and 4.375 mg(RSD=0.55%, n=6);the average cumulative release rates were respectively 32.7%(RSD=2.01%)and 69.25%(RSD=1.43%)at 0.25 h and 2 h. CONCLUSIONS:The method of preparing the above-mentioned film with homogeneous contents is simple.

OBJECTIVE: To determine the contents of telmisartan and hydrochlorothiazid in compound telmisartan preparation by TLC. METHODS: Using acetic ether-chloroform-methanol-glacial acetic acid (50∶40∶10∶5) as developer, the contents of telmisartan and hydrochlorothiazid were determined by dual wavelength thin layer chromatography with the reflection linearity parameter SX=7 and slit=1.0 mm?5.0 mm. The determinated wavelength of telmisartan was as follows: ?R=365 nm and ?S=305 nm; the wavelength of hydrochlorothiazid was as follows: ?R=370 nm and ?S=275 nm. RESULTS: The linear ranges of telmisartan and hydrochlorothiazid were 1.114～5.57 ?g (r=0.999 6) and 3.664～18.32 ?g (r=0.999 8), respectively, and the average recovery rates of telmisartan and hydrochlorothiazid were 97.95% (RSD=1.30%) and 98.32% (RSD=1.13%), respectively. CONCLUSION: The method is simple, rapid, accurate and it can be used for the quality control of compound telmisartan preparation.

BACKGROUND:Basic research demonstrated that type Ⅰ collagen exhibited prominent effect on osteogenesis,bone mass and bone fracture,which also participated in the bone fusion.However,few reports concerning the polymorphism of type Ⅰ collagen gene and spinal fusion.OBJECTIVE:To investigate the polymorphism of type Ⅰ collagen and to explore its relationship with the spinal fusion rate following metal implant or autogenous bone transplantation.METHODS:A total of 200 volunteers who need to receive spinal fusion in the Affiliated Hospital of Qingdao University Medical College were selected,including 102 cases received anterior cervical subcorpectomy combined with lilac bone implantation fusion following decompression,and 98 cases received posterior laminectomy for decompression combined with intertransverse process fusion.Meantime,223 normal adults were served as the control group.The peripheral blood was drawn-off and genomic DNA was extracted from white blood cells.The specific fragment which includes the objective gene was amplified by polymerase chain reaction (PCR),with length of 293 bp.The genotypes of Pcol2 site in type Ⅰ collagen were detected by PCR-restriction fragment length polymorphism (PCR-RFLP) method.The PCR product was digested with restriction endonuclease Eco311 and the result was observed by agarose gel electrophoresis.The G gene represented for the presence of the restriction endonuclease site,while the T gene for the absence of the restriction endonuclease site.The fusion rate of the bone graft was evaluated by x-ray film prior to and at months 3,6 and 12 after operation,and the results were compared by stages including quick (＜3 months),middle (3-6 months) and slow (6-12 months).RESULT AND CONCLUSION:There were the-1997G/T polymorphisms of the type Ⅰ collagen gene in 423 cases,including 166cases with GG,232 cases with GT,and 25 cases with TT,in addition,there was some correlation between the GG genotype and the lilac bone implantation fusion (P =0.004).The GG genotype accounted for 50% in the fast group,which was obviously greater than that of the middle and slow groups (33.3% and 16.7%,respectively).However,the-1997G/T polymorphisms had no correlation with the bone graft fusions inter transverse process of lumbar vertebra (P=0.831).The GG genotype in the-1997G/T polymophsim of the type Ⅰ collagen gene may be the essential factor which can promote the C-spine auto-ilium graft fusion.