Objective To investigate the effect of nerve growth factor (NGF) and ciliary neurotrofic factor (CNTF) on the regeneration and functional recovery of sciatic nerves following sciatic nerve injuries (SNI). Methods The left sciatic nerves for 6 mm in 120 Wistar ratswere removed and divided randomly into 4 groups. Target muscular injection of NGF at concentration of 100 ng/kg and CNTF at 100 ng/kg was given to Group NGF+CNTF; CNTF at 100 ng/kg to Group CNTF; NGF at 100 ng/kg to Group NGF and equal quantity of normal saline to Group NS. Sciatic nerve functional index (SFI) measurement, morphometric analysis, S-100? and NF200 immunohistochemistry were performed for all the animals after operation. Results SFI, diameter and number of myelinated axons, and axonal quantity of S-100? and NF200 were significantly higher in Group NGF+CNTF than that in other groups. Conclusions Combined application of NGF and CNTF can enhance regeneration and functional recovery of sciatic nerves posterior to SNI.

There is close relationship between the morphologic changes of peripheral nerve after injury and its function recovery during regeneration. In our experiment, the sciatic nerve of rats was transected and bridge-connected with silicone tube, and the images of serial slices of different time and different injury parts were taken by micro-photograph system. The volume unit model was applied to rendering the three dimensional (3D) structure of degenerative and regenerative sciatic nerve fiber and its affiliated structure after injury. The 3D images showed that node of Ranvier had not formed and its array was turbulent, both the myelin sheath and the axis-cylinder were thinner, and the collagen fibres had proliferated.
Animals ; Male ; Nerve Regeneration ; physiology ; Rats ; Rats, Wistar ; Recovery of Function ; Sciatic Nerve ; injuries ; pathology ; physiopathology

Objective To introduce a new method of trans-superior limb of cerebellopontine fissure approach for exploring and managing superomedial responsible vessels of facial nerve of patients with hemifacial spasm.Methods Clinical data of 21 patients with hemifacial spasm among 183 consecutive patients were analyzed retrospectively in our hospital from February 2009 to December 2013.Dissection of the superior limb of the cerebellopontine fissure was performed to explore the distribution and the severity of compression of the superomedial responsible vessels of the facial nerve,and microvascular decompression was performed.Results Neurovascular compression was found in all of the patients,primary responsible vessels were found in 13 patients,and secondary responsible vessels were found in 8 patients.Complete spasm alleviation was achieved immediately after operation in 18 patients,and complete spasm alleviation was achieved in all of the patients 3 months after operation.No severn complications occurred and no patient died.No recurrence was noted after an average 56 months of follow-up.Conclusion The trants-superior limb of cerebellopontine fissure approach could avoid the defects of standard suboccipital retrosigrnoidal approach,which allows easy identification and management of the superomedial responsible vessels of the facial nerve of patients with hemifacial spasm;thus,high consistent successful rate and low complication rate could be found.

Objective:To investigate the short-term effects of articular injection of hyaluronic acid combined with glucocorticoid in patients with knee osteoarthritis.Methods:From October 2017 to June 2018, a total of 188 patients diagnosed with knee osteoarthritis received parallel articular injection. There were 60 cases with mild knee osteoarthritis, 72 with moderate and 56 with severe according to the WOMAC knee functional score. There patients were divided into group rank Ⅰ48 cases, Ⅱ 49 cases, Ⅲ 45 cases, Ⅳ 46 cases according to the knee joint X-ray Kellgren-Lawrence classification. The unified treatment regimen was 2.5 ml Sodium Hyaluronate (SHA) injection for the first time, SHA 2.5 ml and compound betamethasone injection (CBI) 1 ml for the second week, and 2.5 ml of SHA for the third week. WOMAC score and Lequesne index were used to evaluate joint function before the first injection and after SHA and SHA+CBI injection. The improvement rate of Lequesne index ≥30% or improvement rate of WOMAC score ≥25% was regarded as effective treatment.Results:Lequesne index and WOMAC score decreased gradually in the mild, moderate and severe groups after 3 weeks of injection. Among these patients, the improvement rates of Lequesne index after SHA injection and SHA+CBI injection were 36.44%±8.46% and 49.26%±13.75% in the mild group, 23.09%±12.61% and 30.66%±14.95% in the moderate group, and 10.50%±8.78% and 11.07%±6.52% in the severe group. The improvement rate of WOMAC score in the mild group after SHA injection and after SHA+CBI injection was greater than 25%. After SHA injection, the improvement rate of WOMAC score was 13.06%±10.21% in the moderate group, and 27.49%±13.61% after SHA+CBI injection. Those in severe group were all less than 25%. Kendall's staub correlation analysis results showed that there was a strong positive correlation between WOMAC function score and X-ray Kellgren-Lawrence classification ( r=0.744, P<0.001). The Lequesne index and WOMAC scores of the Kellgren-Lawrence X-ray classification decreased gradually after 3 weeks of injection. The improvement rate of Lequesne index period in group rank Ⅰ after SHA and SHA+CBI injection was 36.64%±10.05% and 52.00%±8.19%, respectively. That for group rank Ⅱ was 32.05%±8.09% and 41.95%±10.53%, group rank Ⅲ 16.93%±10.34% and 27.77%±10.25%, group rank Ⅳ 7.52%±5.53% and 7.60%±6.66%. The improvement rate of WOMAC score period in group rank Ⅰ after SHA and SHA+CBI injection was 29.48%±11.77% and 42.59%±13.55%, respectively. That for group rank Ⅱ was 26.72%±10.21% and 30.49%±16.90%, group rank Ⅲ 13.78%±5.96% and 23.05%±9.52%, group rank Ⅳ 4.77%±3.80% and 4.27%±4.23%. Conclusion:For mild or X-ray classification Ⅰ, Ⅱ knee osteoarthritis patients, articular injection SHA or SHA+CBI are effective. Further, SHA+CBI is better than single injection of SHA. SHA+CBI injection was effective for moderate knee osteoarthritis patients. For severe or X-ray classification Ⅲ, Ⅳ patients, SHA or SHA+CBI injection at interval are invalid.

Objective: To explore the relationship between the level of mental stimulation and the suicide attempts of rural residents in Shandong Province. Methods: A 1:1 matched case-control study was designed to collect 1 200 cases from a survey of three suicide attempts in rural areas of Shandong Province. Controls were selected according to the following matched factors: age difference within 3 years, same gender, same village or neighboring village, no blood relationship, no suicide history. The basic characteristics of all subjects were collected through the questionnaire, and the level of mental stimulation of life events was measured. Multivariate conditional logistic regression model was used to analyze the relationship between the level of mental stimulation of life events and suicide attempts. Results: The mean age of the case group and the control group was both (36.6±0.3) years old, and 35.8% (430/1 200) were males in each group. The low-medium level of mental stimulation of negative life events in the case group was 16.7% (200/1 200) and 61.7% (740/1 200), respectively, which was higher than that in the control group, about 2.5% (30/1 200) and 29.3% (352/1 200) (all P values <0.05), respectively. A total of 11.1% (133/1 200) of the case group had positive life events, which was lower than that of the control group [16.8% (201/1 200)] (all P values<0.05). Multivariate logistic regression model analysis showed that after the adjustment of gender, age, place of residence, education level, marital status, occupation, family income, somatic disease, mental disorders, family history of suicide, and opposite life events, the low-medium and high level of mental stimulation of negative life events were risk factors for suicide attempts, with OR (95%CI) as 5.88 (4.53-7.64) and 13.94 (8.15-23.86), respectively. Mental stimulation of positive life events was protective factor of suicide attempts, with OR (95%CI) as 0.58 (0.41-0.82). Conclusion Mental stimulation of negative and positive life events were risk and protective factors for suicide attempts.