[Objective]To study the relationship between ossification of ligamentum nuchae(LN) and degeneration of ligamentum flavon(LF) of cervical spondylotic myelopathy(CSM).[Method]Fifty-six cervical LF samples from CSM patient of C_(3~7) in relation to the stage of ossification of LN samples(experimental group,EG) and 38 samples of corresponding ligament from patient with cervical vertebral trauma(CVT)(control group,CG) were obtained.Thickness of LF was measured,their pathological change was examined by microscopy,content of collagen and kydrolyproline and the ratio of type Ⅰ/ type Ⅱ collagen were determined by Woessners method and setting Salting out method.The correlation among the thickness of degenerative LF,the ratio of type Ⅰ/ type Ⅱ collagen,the content of collagen and hydrokyproline,and arrangement disorder of LF in relation to the ossification stage of LN were analyzed.[Result]In EG,as compared with in CG,there showed a decrease of elastic fibre,decrease of ratio type Ⅰ/ type Ⅱ collagen due to significant increase of type Ⅱ collagen,increase collagen content and disorder arrangement of LF.In relation to the ossification of LN,above changes were more marked in LF of C_(4、5),C_(5、6),than that of C_(3、4),C_(6、7)(P

Objective To study the effect of Schwann cell enclosed by antibody of neural cell adhesion molecule L1 on injured spinal cord. Methods Over 98% of the purity of Schwann cells obtained from bilateral sciatic nerves of 2 days newborn SD rats, the concentration of Schwann cells was about 2.5?104 /?l. The Schwann cells were enclosed by the antibody of neural cell adhesion molecule L1 using co-culture. The adult SD rats (weight 200-250 g) were used to establish the model of spinal cord injury by hemi-transection at the left side of T10 level. The animals were divided into three groups; the SC group was transplanted with 20 ?l suspension Schwann cells; the anti-L1 group with 20 ?l Schwann cells enclosed by antibody of neural cell adhesion molecule L1; and the control group was injected solely with normal saline to the injured cord. Eight weeks later regenerated neural axons were investigated through horseradish peroxiase HRP retrograde trace immunohistochemistry of neurofilament and Western blot. Results Few regenerated neural axons appeared in the control group; some of regenerated neural axons could be observed in anti-L1 group; plentiful and bulky regenerated neural axons were found in SC group. The group with antibody had significant less HRP positive neurons and neural axons than the group without antibody. Western blot showed that the quantity of neurofilament in the anti-L1 group was only two thirds of the SC group. Conclusion Schwann cell-derived neural cell adhesion molecule L1 is able to enhance the neural axon regeneration of injured spinal cord.

Objective To study the clinical features, treatment strategy and prognosis of children and adolescent with spinal bone tumors. Methods Forty-three patients were retrospectively investigated from January 1987 to June 2002, thirty-one of which were male, and the others were female. The age of patients ranged from 3 to 16 years with an average of 11.8 years. The pathological examination suggested that tumor-like conditions were 11 cases (25.6%), benign tumors 13 cases (30.2%), and malignant tumors 19 cases (44.2%). The cervical vertebrae tumors were 15 cases, thoracic vertebrae 16 cases, lumbar vertebrae 6 cases, and sacral vertebrae 6 cases. Treatment included: 1 case of malignant lymphoma was only subjected to chemotherapy; and the others were undertaken tumor resection and bone grafting to fusion with or without internal fixation. All patients of malignant tumors were performed adjuvant radiotherapy or chemotherapy after operation. Results The follow-up period was from 1 to 10 years with an average of 4.3 years. All patients of benign tumors obtained satisfied outcomes with local symptom and neural deficits improved, and no tumor recurrence happened. 6 cases (2 cases of primitive neural ectodermal tumor, 1 case of Ewing's sarcoma, 1 case of neuroblastoma, 1 case of plasma cell sarcoma and 1 case of chondrosarcoma) of malignant patients were died from metastasis and systemic failure, and the ratio was 14% and 31.6% of total and malignant tumor respectively. One case of bone giant cell tumor and 1 case of Schwannoma got recurrence at 2.5 years and 10 months after operation respectively. Conclusion For patients of children and adolescent with spinal bone tumors, the prognosis of the benign is better if tumors were removed radically. However, the patients with malignant tumors had worse prognosis with higher recurrent or death rate, and its prognosis is closely correlated to tumor's characters, operation strategy, and extending postoperative therapy.

Objective To detected the motor cortex reorganization and compared the influence on reorganization process as regard to different transfer modes of contralateral seventh cervical nerve root (C7)in young rats model of total brachial plexus root avulsion. Methods The young Sprague-Dawley rats model of total brachial plexus root avulsion was established. The left radix dorsalis and radix ventralis from the fifth cervical nerve root (C5) to the first thoracic nerve root (T1)were exposed and the roots from C5 to T1 were avulsed from the spinal cord. Then, the contralateral C7 transfer operation was performed. Three different operative modes were applied randomly which included contralateral C7 transference to anterior division of the upper trunk (group A, n=30), to both musculocutaneous and median nerves (group B, n=30), or to median nerve (group C, n=30). The movement evocation of motor cortex was measured by intracortical microstimula-tion in both hemispheres, and functional reorganization was assessed dynamically in 1.5, 3, 6, 9 and 12 months after operation. Results After contralateral C7 transference, the ipsilateral motor cortex initially acti- vated the injured limb at 1.5 month, and subsequently the motor cortex of both hemispheres activated the in-jured limb at the 3rd and 6th month. The injured limb was activated mainly by the contralateral motor cortex in group A at the 9th month. The contralateral motor cortex exclusively controlled the injured limb in all three groups at the 12th month after the operation. Meanwhile, the extent of functional reorganization was better in group B than that of group C. Conclusion After contralateral C7 transfer operation, motor cortex in charging injured limb developed a transhemispheric functional reorganization in young rats with total brachial plexus root avulsion. Different operative modes contributed to the functional reorganization of motor cortex. Transferring contralateral C7 to anterior division of the upper trunk or to both musculocutaneous and median nerves provided better functional reorganization than to median nerve.

BACKGROUND:Genotype of Kunming mice was similar to human population,thus an establishment of embryonic stem cell line is beneficial for research of transgenic animal.However,the best time to collect embryo has been less reported yet.OBJECTIVE:To find the best time to collect embryos from Kunming mice.METHODS:The embryos were collected from mother mice of 2.5,3.5,and 4.5 pregnant days.Microscope was used to evaluate the growth condition of embryos,embryo attaching rate(A/C),inner cell mass(ICM)growing rate(I/C),embryonic stem cells (ESCs)clone growing rate(P1/C)and ESCs subclone growing rate(P2/C).The cells were then stained with alkaline phosphatase.RESULTS AND CONCLUSION:Most of the 2.5-pregnant-day embryos were 16-cell-phase embryos.The 3.5-pregnant-day embryos were morulas while the 4.5-pregnant-day embryos were blastulas.There were no significant differences in A/C,I/C,P1/C,P2/C between 2.5 and 3.5 pregnant days(P ＞ 0.05).The 4.5-pregnant-day indicators mentioned above were significantly greater than those two groups;therefore,4.5-pregnant-day embryos were the best source to culture,clone,isolate and passage ESCs.

Objective To observe the effect on the patients of diabetes mellitus and cerebral infarction in terms of level of blood rheology and endothelin after using both intravenous low intensity laser irradiation (ILILI) and traditional Chinese medicine Tangnaoluotong in the treatment. Method Ninety patients of diabetes mellitus and cerebral infarction, having the symptom of deficiency in both vital energy and yin with blood stasis, were divided into three treatment groups at random:ILILI group (A), TCM treatment group (B), and a group with compound treatment of ILILI and TCM (C). The level of blood rheology and endothelin were observed after 1 month’s treatment. Result Compared with group A and group B, group C could significantly reduce the level of fibrinogen and endothelin, improve the deformed ability of RBC. Conclusion ILILI with Tangnaoluotong can significantly alter the blood rheology and endothelin on the patients of diabetes mellitus and cerebral infarction, which result in a better curative effect.

Capital logic is the first to be avoided in the construction of medical humane service system,for it is capital logic that manifest the current technical and commercialized time with an "indifferent" characteristic.Capital logic originated and distended from the western culture.As another spiritual pursuit and wisdom,traditional Chinese philosophy provides us with significant ideological resources and helpful revelation for improving medical humane service in current circumstances.

Objective To observe the effect of intravenous low intensity laser radiation (ILLLI) combined with traditional Chinese medicine on TXB2, 6-Keto-PGF1? and Ang II of the rabbits of experimental diabetic stroke. Method 35 successfully modeled rabbits, after alloxian injection for diabetes and photochemical radiation for stroke, were randomized into four treatment group-control group (B), ILIB group (C), a group with compound treatment of ILIB and TCH (D), TCM treatment group (E), and 7 unmodeled rabbits were made as the normal group (A). TXB2, 6-Keto-PGF1? and Ang II level were observed and compared. Result Compared with group B, group C and E can significantly rectify the disorderly TXB2, 6-Keto-PGF1? and Ang II, Group D was better than C and E. Conclusion ILLLI combined with TCM can effectively rectify the TXB2, 6-Keto-PGF1? and Ang II level, reduce nervous injury, cure diabetes cerebral infarction.

Objective To observe the characteristics of fundus fluorescein angiography (FFA) and optical coherence tomography (OCT) in juvenile retinoschisis. Methods The photochromes of the ocular fudus of 7 cases (14 eyes) who were diagnosed as juvenile retinoschisis were taken, among whom, 5 (10 eyes) were examined by FFA, and 6 (12 eyes) by OCT. Results In 8 eyes with cystiform stellate maculopathy under ophtalmoscope, the result of FFA showed granular fluorescence in different density and shape without exact connection of the configuration between these granules and the cystlike maculopathy. In 2 eyes with pigment disorder in the macula under ophthalmoscope, blocky fluorescence was found in FFA. In 3 eyes with peripheral schisis, FFA discovered distorted and dilated retinal capillaries with different extent, and flecks of non-perfusion area. OCT images revealed thickening of the macular neuroepithelium with laminal seperation, and cystic low-reflect areas in the inner layer. Conclusions In juvenile retinoschisis, pigment proliferation and degeneration in the macular area could be found. Granular fluorescence and cystic low-reflect areas could be seen in FFA and OCT, respectively.

Objective To investigate the biology reference intervals for five parameters of thyroid gland function(TSH,T3, T4,FT3 and FT4)in Baoji area,in order to provide evidence for effective filtration and diagnosis.Methods Refer to the files recommended by (NCCLS)C28-A2 about the description of definition,establishment and confirmation,five parameters of thyroid gland function were measured in 4 820 healthy persons by using Roche E601 electrochemical immunoassay analyzer and its assemble reagent,calibration materials and quality control,the statistical method was applied to the data processing by different gender,to establish the biology reference intervals of each parameters.And compared with National Guide to Clinical Laboratory Procedures(Third Edition).Results The range of 95% normal reference intervals of TSH,T3,T4,FT3 and FT4 in male were 0.20~4.28 mIU/L,1.22~2.46 nmol/L,64.64~149.00 nmol/L,3.00~6.04 pmol/L,11.93~22.21 pmol/L respectively,and in female were 0.20~4.52 mIU/L,1.24~2.44 nmol/L,67.60~142.40 nmol/L,2.96~5.76 pmol/L and 11.86~21.54 pmol/L,respectively.Compared the level of TSH,FT3,FT4 between male and female, differences were statistical significance(t=3.962,7.570,5.132;P=0.042,0.026,0.033).Compared the level of T3,T4 be-tween male and female,there was no statistical significance (t=0.000,1.151;P=1.000,0.120).The study compared with National Guide to Clinical Laboratory Procedures (Third Edition),the results of T3,T4,FT3 and FT4 in male were statisti-cal significance (t=9.755,4.349,114.7,79.82;P=0.000,0.003,0.000,0.000),the results of TSH,T3,FT3 and FT4 in female were statistical significance (t=5.304,9.548,128.9,72.99;P=0.002,0.000,0.000,0.000).Conclusion The in-vestigation of biology reference intervals for five parameters of thyroid gland function in Baoji area can provide more precise-ly reference data for clinical diagnosis and treatment.