Retroviral vector pLXSN was employed to introduce human r-Interferon (IFN-?) gene into four human hepa-tocellular carcinoma cell lines (HCC). The G418-resistant colonies were isolated and cloned. PCR and RT-PCR analysis indicated that the integration and expression of IFN-? gene was shown only in the transduced cells. Using a bioassay method, we found that all genetically modified HCC cells can secrete varied amount of IFN-?. The results of flow cytome-try showed that the cell surface expression of HLA class I molecules significandy increased following transduction. Moreover , we firsdy indicated that the increase in the expression of one specific HLA class I antigen, HLA-A2, was almost in the same magnitude as that of the total HLA class I molecules after transduction with IFN-r gene.

Objective To investigate the effects of the expressions of thymidine kinase 1 (TK1) and Ki67 alone or their combination on the recurrence and metastasis of breast cancer.Methods Sixty-five samples were selected from the Second Affiliated Hospital of Guangzhou Medical University from March 2005 to June 2007,which were resected by surgical operation and confirmed as breast carcinoma by pathology.They were individed into two groups including 37 cases with recurrence or metastasis in 5 years (group A),28 cases without recurrence or metastasis in 5 years (group B).The expressions of TK1 and Ki67 in the two groups were detected by immunohistochemical staining assay.Then,Kaplan-Meier assay was used to describe survival curve.Results The positive expression rate of TK1 in group A was 91.8％,which was dramatically higher than that in group B 67.8％ (x2 =6.116,P =0.013).The positive expression rates of Ki67 in group A and B were 78.4％ and 42.9％ (x2 =8.635,P =0.003).The positive expression rates of TK1 combined with Ki67 in group A and B were 67.6％ and 39.3％ (x2 =5.159,P =0.023).Moreover,disease free survival of patients with positive expression of TK1 combined with Ki67 decreased significantly,compared with patients with positive expression of TK1 or Ki67 alone (x2 =6.137,P =0.046).Conclusion Positive expression of TK1 combined with Ki67 is the high risk factor of the reccurence or metastasis of breast carcinoma,and indicates poorer prognosis compared with positive expression alone.

Perfluorinated compounds (PFCs), a group of persistent organic pollutants, have been widely detected in environmental media and posed great threat to human health. The researches on environmental pollution and health concern of PFCs are the hotspot areas. Because PFCs contain lots of homologs and isomers which are detected at trace levels (ng/g or μg/L) in environment, advanced and reliable analytical methods for determination of PFCs in environment are urgently needed. At present, studies on analytical methods of trace PFCs in environmental samples have been widely carried out in China and abroad. However, systematic review on the sample pretreatment, analytical method, and matrix effect of PFCs determination in complex environmental matrixes is relatively scarce. Therefore, this paper reviews the pretreatment methods, martix effects, and detection techniques (especailly isomers) of PFCs in environment samples (water, sediment/sluge, soil and plant). We hope that this review may provide valuable reference for the enviromental researches on PFCs.

Objective To investigate the curative effect of cocktail combined with tranexamic acid(TXA)on total knee arthroplasty(TKA)under the concept of enhanced recovery after surgery(ERAS).Methods Seventy patients with knee osteoarthritis who received unilateral TKA treatment admitted to the Second Affiliated Hospital of Bengbu Medical College from September 2020 to July 2022 were ret-rospectively analyzed.According to different treatment methods,they were divided into experimental group and control group,with 35 ca-ses in each group.Under the guidance of ERAS concept,the experimental group received injected intraarticular mixture of cocktail and TXA during the operation,while the control group received injected intraarticular mixture of cocktail and normal saline.Postoperative drainage volume,hemoglobin(Hb)decline and total blood loss at 3 days after operation,blood transfusion rate,first ambulation time,length of hospital stay,postoperative pain visual analogue scale(VAS)、knee range of motion(ROM)and HSS score at different time points after operation,delayed wound healing,wound infection and incidence of deep vein thrombosis were compared between the two groups.Results The postoperative drainage volume,decline of Hb and total blood loss at 3 days after operation,blood transfusion rate in the experimental group were less than those of the control group,the differences were statistically significant(P＜0.05).The first ambu-lation time and length of hospital stay in the experimental group were significantly lower than those of the control group,the difference were statistically significant(P＜0.05).There were no significant differences in pain VAS score at 1 day,2 days,3 days,7 days,14 days af-ter operation between two groups(P＞0.05).There were no significant differences in ROM at 7 days,14 days after operation and HSS score at 4 weeks,12 weeks after operation between two groups(P＞0.05).Conclusion Under the concept of ERAS,intraarticular in-jection of cocktail combined with TXA in TKA can effectively reduce postoperative blood loss,improve postoperative pain,reduce periop-erative risks,and promote better early postoperative rehabilitation,the clinical effect is significant.

Objective:To investigate the surgical method and curative effect of resection of craniopharyngioma through sub-frontal longitudinal fissure duramater-keyhole approach.Methods:The clinical data, imaging data of 179 patients with craniopharyngioma treated by sub-frontal longitudinal fissure duramater-keyhole approach from January 2017 to January 2021 in Sanbo Brain Hospital Capital Medical University were studied retrospectively.Results:Through this approach, total resection in 175 cases (97.77%), near total resection in 2 cases (1.12%), partial resection in 2 cases (1.12%); drilling of the tuberculum sellae in 31 cases (17.32%); the pituitary stalk was reserved in166 cases (92.74%), preserved in 13cases (7.26%); papillary craniopharyngioma in 27 cases (15.08%), ameloblastic craniopharyngioma in 152cases (84.92%); postoperative visual acuity improved in 65 cases (36.31%), not improved in 53 cases (29.61%), decreased in 6 cases (3.35%); electrolyte disorder in 101 cases (56.42%), polydipsia and polyuria in 65cases (36.31%), cerebrospinal fluid rhinorrhea in 3 cases (1.68%), hydrocephalus in 6 cases (3.35%). Postoperative hematoma in 2 (1.12%) cases and cerebral infarction in 6 cases (3.35%), intracranial infection in 8 cases (4.47%), postoperative disturbance of consciousness in 4 cases (2.23%) and death in 3cases (1.68%).Conclusions:Sub-frontallongitudinal fissure duramater-keyhole approach is an effective combination of minimally invasive and delicate surgery principle. It is a safe and effective method for the treatment of craniopharyngioma.

Objective:To analyze the surgical (anatomical) approach of craniopharyngioma based on the concept of anterior central space of brain base.Methods:The clinical data of MRI images of 10 cases of craniopharyngioma who treated in Sanbo Brain Hospital, Capital Medical University from January 2021 to December 2021 were analyzed retrospectively. The brain cisterns involved in the growth of craniopharyngioma were analyzed from the perspective of anterior central space of brain base. Meanwhile, the surgical approach and the basis of selection were discussed.Results:Among all the surgical approaches that can reach the anterior central space of the brain base, the fronto-basal interhemispheric approach was the best.Conclusions:The concept of anterior central space of the brain base is a new observation and interpretation of the anatomy of the brain base from a new perspective, and then create a new concept of brain base surgery. As a new method to analyze the surgical anatomy of this area, its inclusion has important clinical significance.

Objective:To study the cause of frontal sinusitis and the prevention methods after opened frontal sinus in the trans-frontal approach surgery.Methods:Retrospectively analyze 18 cases of frontal sinusitis secondary to the trans-frontal approach surgery in Sanbo Brain Hospital, Capital Medical University from January 2016 to December 2020. The main symptoms include headache, stuffy nose, skin redness and skin abscess in frontal. The mean history was 3.2 years, all the patients were performed surgical treatment, including 5 patients undergone trans-nasal trans-sphenoid sinus operation, 14 patients undergone debridement surgery following the original surgical approach. The cause of frontal sinusitis were analyzed statistically.Results:All the patients were totally cured post operation, the standard included no frontal sinus inflammation symptoms, no imaging characters of frontal sinusitis.Conclusions:Proper management of opened frontal sinus in trans-frontal approach is very important for preventing the frontal sinusitis. Completely remove the frontal sinus mucosa, avoid using bone wax, chemical glue stuffing, which can effectively prevent the frontal sinusitis.

Objective To explore the effect of nimodipine combined with minimally invasive puncture on neurological function,hemodynamics,and serum inflammatory factor levels in patients with hypertensive intracerebral hemorrhage(HICH).Methods A total of 108 patients with HICH treated at the Second Affiliated Hospital of Hebei North University from June 2019 to May 2022 were selected as the research subjects.They were divided into an observation group(n=55)and a control group(n=53)according to the treatment method.All patients in the two groups received minimally invasive puncture;on this basis,the patients in the observation group were treated with nimodipine for one month.The neurological deficit of patients in the two groups was evaluated by the National Institute of Health Stroke Scale(NIHSS)score before and after treatment.Before and after treatment,5 mL of fasting venous blood was taken from patients in the morning,and the serum was obtained by centrifugation.The serum levels of brain-derived neurotrophic factor(BDNF),neuron-specific enolase(NSE),C-reactive protein(CRP),tumor necrosis factor-α(TNF-α)and interleukin-6(IL-6)were detected by enzyme-linked immunosorbent assay.Ultrasonic transcranial Doppler blood flow analyzer was used to monitor the hemodynamic indexes such as mean blood flow velocity(Vm),resistance index(RI)and pulsitility index(PI)of patients in the two groups before and after treatment.The adverse reactions such as headache,dizziness,infection and rebleeding were recorded in the two groups after treatment.Results There was no statistically significant difference in the NIHSS score and serum NSE and BDNF levels between the two groups before treatment(P＞0.05).After treatment,the NIHSS score and serum NSE level of patients in the two groups were significantly lower than those before treatment,while the serum BDNF level was significantly higher than that before treatment(P＜0.05).After treatment,the NIHSS score and serum NSE level of patients in the observation group were significantly lower than those in the control group,while the serum BDNF level was significantly higher than that in the control group(P＜0.05).There was no statistically significant difference in the Vm,PI and RI between the two groups before treatment(P＞0.05).After treatment,the Vm and PI of patients in the two groups were significantly higher than those before treatment,while the RI was significantly lower than that before treatment(P＜0.05).After treatment,the Vm and PI of patients in the observa-tion group were significantly higher than those in the control group,while the RI was significantly lower than that in the control group(P＜0.05).There was no statistically significant difference in serum TNF-α,IL-6,and CRP levels between the two groups before treatment(P＞0.05).The levels of serum TNF-α,IL-6,and CRP of patients in the two groups after treatment were significantly lower than those before treatment(P＜0.05).After treatment,serum TNF-α,IL-6,and CRP levels of patients in the observation group were significantly lower than those in the control group(P＜0.05).The incidence of adverse reactions in patients in the control group and observation group was 7.55％(4/53)and 9.09％(5/55),respectively,and the difference in the incidence of adverse reactions between the two groups was not statistically significant(P＞0.05).Conclusion Nimodipine combined with minimally invasive puncture can effectively improve the blood perfusion rate of HICH patients,reduce the degree of inflammatory response,and alleviate the patients'neurological function damage.

In fixed prosthodontics, clear exposure of the preparation margin is the prerequisite for obtaining accurate digital impressions and improving the marginal fit of restorations. To resolve the issues associated with the cord retraction technique, such as pain, acute injury, and prolonged procedural time, this study proposes a new technology for intraoral digital impression taking with pneumatic gingival retraction. The new scanning head blows a high-speed airflow that instantaneously separates the free gingiva, locally exposing the subgingival preparation margin. Combined with the farthest point preservation stitching algorithm based on the distance from the normal vector and high-speed laser scanning photography, it achieves global preparation edge data and gingival reconstruction, realizing painless, non-invasive, and efficient precise acquisition of the preparation margin. Using this new technique, a patient with a full porcelain crown restoration on a posterior tooth was treated. The digital impression revealed a clear margin of the preparation, and the crown made from this data has a good marginal fit.