In this review, the analytical methods of polyethylene glycol-modified proteins are introduced, including spectroscopy, liquid chromatography, electrophoresis, mass spectrometry, etc. These methods are compared in respect to their individual characteristics.

Objective To investigate the effect of atorvastatin on cytochrome c (CytC) expression and neuronal apoptosis after intracerebral hemorrhage in rots.Methods A total of 108 male Sprague-Dawley rats were randomly allocated into 3 groups:sham operation group,saline control group,and atorvastatin group (n =36 each group).All the groups were redivided into 6 h,12 h,day 1,3,5 and 7 time points (n =6 at each time point).An intracerebral hemorrhage model was induced by using a modified two-step injection method.After modeling,atorvastatin was used for gavages (20 rng/kg,once a day) in the atorvastatin group.The saline control group was given the same volume of saline.Behavior evaluation was used for neurological score.TUNEL staining was used to detect apoptosis in perihematoma tissue.Immunohistochemical method was used to detect the CytC expression in perihematoma tissue.Results Behavior evaluation showed that the neurological scores decreased gradually with the passage of time in the atorvastatin group and the saline control group.There were no significant differences at 6 h,12 h,day 1 and day 3,but the neurological scores in the atorvastatin group were significantly lower than those in thc saline control group at day 5 (0.50 ± 0.55 vs.1.50 ± 0.55; t =3.162,P =0.010) and day 7 (1.00 ±0.63; t =2.712,P =0.022).TUNEL staining showed that the numbers of apoptotic cells increased first and then decreased in the saline control group and the atorvastatin group.They reached the peak at 1 hour after modeling.There were significant differences in the number of apoptotic cells in each group in perihematoma tissue at the same time point (all P =0.000),and the significance in the saline control group was more than that in the sham operation group and the atorvastatin group (all P ＜0.05),but at day 7,there was no significant difference in the number of apoptotic cells between the atorvastatin group and the sham operation group (12.69 ± 3.35 vs.9.33 ± 2.07; P =0.148).Immunohistochemical method showed that the numbers of CytC positive cells increased first and then decreased in the saline control group and the atorvastatin group,reached the peak at 12 h after modeling in te saline control group (68.19 ± 11.93) and at 1 d in the atorvastatin group (35.64 ± 9.12).There were significant differences in the numbers of CytC positive cells in perihematoma tissue at the same time point in each group (P =0.000).The numbers of CytC positive cells in the saline control group was significantly more than that in the sham operation group and the atorvastatin group (all P ＜0.05),but there was no significant difference in the numbers of CytC positive cells between the atorvastatin statin group and the sham group at day 7 (16.08 ± 3.80 vs.13.67 ± 2.94; P =0.349).Conelusions Atorvastatin may inhibit the release of CytC of nerve cells in perihematoma tissue after intracerebral hemorrhage,and thus reduce CytC-mediated apoptosis and neurological deficit after intracerebral hemorrhage.

Objective To explore the role of intracranial electrode EEG monitoring for localizing epileptogenic zone in epilepsy.Methods 20 patients with refractory temporal lobe epilepsy,whose seizure onsets were unable to be localized by MRI、routine EEG and clinical characteristic,accepted long-term intracranial electrode EEG monitoring.Bitemporal lobe subdural implanted trip electrode were used to perform the ictal and interictal EEG monitoring under the guiding of the stereotactic technique.The results routine of EEG,MRI and intracranial electrode EEG were combined.The accuracy for localization of epilepitogenic zone was evaluated based on the followed-up.Results The intracranial electrode EEG monitoring was implanted within 1～5 d.Each patient was recorded the ictal and interictal discharge and was detected clinical onsets at least twice.All patients could be localized by ictal EEG.The consistency between interical EEG and ictal EEG were observated in 15 cases,the inconsistency in 3 cases,and 2 cases were bilateral discharge in interictal.The clinical outcome showed that patients were seizure-free in 13 cases(65%),improved significantly in 3 cases(15%),improved in 3 cases(15%),unimproved in 1 case(5%)according to Engel's criteria after surgery.No significant complication was found in all patients.Conclusion The intracranial electrode EEG monitoring can localize epileptogenic zone and offer reliable evidence for epilepsy surgery.

Objective To analyze the prognostic factors and evaluate the effect of stereotactic radiosurgery for patients with multiple brain metastases. Methods Comparison was made in 53 such patients treated by stereotactic radiosurgery plus radiotherapy and 53 treated by radiotherapy alone. Patients were matched paired according to the following criteria: age, Karnofsky performance scale(KPS) before treatment, extent of systemic cancer and number of brain metastasis.Fourty patients had stereotactic radiosurgery, 13 patients stereotactic fractionated radiosurgery. In the stereotactic radiosurgery group, the patients were given a mean marginal dose of 20?Gy. Methods of stereotactic fractionated radiosurgery was 4 12?Gy per fraction, twice a week to a total dose of 15 30?Gy. Whole brain radiotherapy was given immediately after stereotactic radiosurgery. For patients treated by radiotherapy alone, the entire brain was treated by 30 40?Gy in 3 4 weeks. Results The median survival was 11.6 months in stereotactic radiosurgery plus radiotherapy and 6.7 months in radiotherapy alone. The one year survival rate and one year local control rate were 44.3%,17.1% and 50.9%,13.2%. Those with KPS increased after treatment gave 1 year survivals of 69.8% and 30.2%, respectively. The validity rates in CT or MRI three months after treatment were 82.0% and 55.0%.The difference in the two groups was found to be statistically significant (P

BACKGROUND: Posterior spinal fusion is a process of bone fusion under special anatomical and biological effects, which affects by many factors. With the development of bone tissue engineering, in vitro constructed tissue engineered bioactive periosteum provides a new approach for solving this problem. OBJECTIVE: To evaluate the effect of in vitro constructed tissue engineered bioactive periosteum in treating lumbar intertransverse process fusion in rabbits. METHODS: In vitro constructed tissue engineered bioactive periosteum was implanted into lumbar intertransverse process of 24 healthy adult New Zealand rabbits. Three different materials were implanted into 3 transverse process gaps (Left L_(4,5,6), Right L_(4,5,6) of each animal. Namely, bone marrow mesenchymal stem cells (BMSCs) combined pig small intestine submucosa (SIS) were implanted into the right L_(4,5) of rabbits in the composite scaffold group; pure SIS was implanted into the right L_(5,6) of rabbits in the pure scaffold group; and autogeneic ilium was implanted into the left L_(5,6) of rabbits in the autogeneic ilium group. All rabbits were sacrificed at 12 weeks after operation to perform gross, imaging and histological observation. RESULTS AND CONCLUSION: The gross observation showed that there had no significant difference between the composite scaffold and autogeneic ilium groups, but the difference was significant compared with the pure scaffold group. lmaging observation showed that the trabeculae was formed in lumbar intertransverse of rabbits in the composite scaffold and autogeneic ilium groups, however, no bone density could be seen in the pure scaffold group. Type I collagen and osteocalcin were strong positive expressed in the composite scaffold group, which had obvious difference to the autogeneic ilium group. No positive expression could be found in the pure scaffold group. It suggested that tissue engineered bioactive periosteum constructed by BMSCs combined with SIS is a well alternative to autogenous graft materials for spinal fusion.

Objective To investigate the risk factors for nosoeomial pneumonia in elderly stroke patients(aged 60 years and over). Methods The clinical data of 259 patients with nosoeomial pneumonia from Jan 2002 to June 2007 were collected and the risk factors were retrospectively analyzed. Results The morbility rate of nosocomial pneumonia in elderly stroke patients was 41.3%,and the risk factors were aging,Iong hospitalization,unconsciousness,type of stroke,and underlying diseases,smoking,tracheal intubation,tracheotomy,application of respiratory machine (all P＞0.05). Conclusions The morbility rate of nosoeomial pneumonia in elderly stroke patients was high,and the risk factors are aging,long hospitalization,unconsciousness,type of stroke,and underlying diseases,smoking,tracheal intubation,tracheotomy,application of respiratory machine.

Objective: To observe the effects of Jinqi Jiangtang Tablet, a compound Chinese herbal medicine, on serum matrix metalloproteinase-9 (MMP-9) level and MMP-9 expression in peripheral blood monocytes of rats with streptozocin-induced diabetes. Methods: Thirty Wistar rats were randomly divided into 3 groups: control group, untreated group and Jinqi Jiangtang Tablet group. Diabetes in rats was induced by a single intraperitoneal injection of streptozocin (70mg/kg body weight). After model building, rats in the Jinqi Jiangtang Tablet group were administered with Jinqi Jiangtang tablets at a dose of 0.8 g/(kg·d) for 6 weeks and rats in the control group and the untreated group were treated with normal saline. After treatment, level of fasting serum glucose was detected by hexokinas method; serum MMP-9 level was tested by enzyme-linked immunosorbent assay; MMP-9 expression in peripheral blood monocytes was measured by reverse transcription-polymerase chain reaction and Western blot method. Results: After treatment, fasting serum glucose level in the Jinqi Jiangtang Tablet group was less than that in the untreated group (P<0.05). After modeling, the serum MMP-9 level of rats in the untreated group was (9.11±3.55) μg/L and that in Jinqi Jiangtang Tablet group was (8.97±3.07) μg/L, which were higher than that in the control group ((4.39±1.44) μg/L) (P<0.01). After gavage, the level of serum MMP-9 was lower in Jinqi Jiangtang Tablet group than in the untreated group (P<0.05). The expression of MMP-9 in peripheral blood monocytes in the untreated group was higher than that in the control group (P<0.05). The MMP-9 expression in peripheral blood monocytes of rats with diabetes was down-regulated by Jinqi Jiangtang Tablet (P<0.05). Conclusion: Jinqi Jiangtang Tablet can decrease the level of serum MMP-9 and down-regulate the MMP-9 expression in peripheral blood monocytes at both mRNA and protein levels in rats with diabetes.

ObjectiveIn order to confirm the value of high resolution frequency(HFUS) ultrasonography in the early diagnosis of psoriatic arthritis(PsA).MethodsTwenty-nine patients with psoriatic arthritis reporting sixty-nine finger pain and 30 patients with rheumatoid arthritis reporting seventy finger pain and 20 healthy volunteers underwent X-ray and US evaluation.The ultrasonographic characteristics and blood flows in the joints were checked with high resolution ultrasonography.Bilateraljoints were compared each other in every patient.Comparisons between groups were tested by x2 test.ResultsSonographic positive signs were found in all the involved joints in 29 PsA patients,joint effusion in 42 fingers (61％).Synovial thickening was found in 38 fingers (55％).Bone erosions were found in 28 fingers(41％),tenosynovitis were found in 40 fingers (58％),soft tissue inflammation was revealed in 29 fingers (42％).Enthesitis were foundin 30 fingers (43％).In RA patients,joint effusion was found in 52 fingers (74％) and synovial thickening in 48 fingers (69％).Bone erosions were found in 33 fingers (47％).Tenosynovitis,soft tissue inflammation and enthesitis were not found in RA patients.ConclusionHigh resolution ultrasonography is an easy,safe and effective method for the early diagnosis of pathological changes of small joints in psoriatic arthritis.

Objective To observe the treatment effect of acupoint massage and auricular point sticking of cowherb seeds on blood pressure of hypertensive patients.Methods 100 cases of hypertensive patients were randomly divided into the observation group and the control group,50 cases in each.The observation group was given routine application of antihyportensive drags combined with acupoint massage and auricular point sticking of cowherb seeds.The control group received routine drug therapy.The blood pressure changes were compared between the two groups before and after treatment.Results The systolic blood pressure and diastolic blood pressure of both groups were lower after treatment compared with those before treatment.The total effective rate of blood pressure control was 98％ in the observation group,88％ in the control group,which showed no significant difference.Symptom control results showed that the total effective rate of the observation group was higher than that of the control group.Conclusions Acupoint massage and auricular point sticking of cowherb seeds in hypertensive patients can be an auxiliary pressure relief means,it can not only effectively lower blood pressure,but show good effect in alleviation of headache,vertigo,irritability.

Objective To evaluate whether second-look endoscopy could prevent endoscopic submucosal dissection complicated with delayed bleeding and to clarify what kind of lesions that need second-look endoscopy. Methods 98 patients with early gastric cancer by histological diagnosis from Oct. 2014 to Sep. 2016 were included in this study. Mucosal damage related bleeding within 24 h after ESD was considered delayed bleeding. Clinical data of patients, lesions, surgical factors, and the incidences of bleeding before and after the second endoscopy examination were retrospectively studied. Results The en bloc resection rate of 98 patients was 100.0%, and all incisal margins were negative. No gastrointestinal perforation, death or severe complications occurred. 5.1%of the patients (5/98) occurred delayed bleeding after ESD and had been successfully stopped in a second-look endoscopy, and none received operations. No delayed bleeding occurred in follow-ups of patients with negative delayed bleeding. 40.0 % of the patients (2/5) with delayed bleeding received blood transfusion. The median time of second-look endoscopy after ESD was the second day after operation (1 ~ 3 d). The median bleeding time of 5 patients with delayed bleeding after ESD was the first day after operation (1 ~ 10 d). The median duration of surgery was 75 min (60~150 min), and the prediction success rate was 94.9 %. The results of univariate analysis showed that age [(69.6 ± 7.9) vs (60.9 ± 10.1) years old, P = 0.003] and operation time [(90.0 ± 41.0) vs (66.0 ± 42.0) min, P = 0.000] were both the risk factors in delayed bleeding and non-bleeding group. Binary Logistic regression analysis showed that operation time (OR^ =1.07; 95%CI:0.73 ~ 14.63, P = 0.010) was the only predictor of delayed bleeding after ESD. Conclusions Second-look endoscopy might be effective in preventing delayed bleeding after gastric ESD, especially within 48 hours after ESD. The operation time was an independent risk factor for delayed bleeding after gastric ESD.