objective To analyze the causes of early complications following posterior lumbar spinal operations and to find out about the way for prevention and treatment of those complications. Methods From 1998 to 2002, 903 patients underwent posterior lumbar spinal operations ,there were 587 males and 316 females , with an average age of 36.7years (range, 18 to 78 years ). The diagnosis of patients included lumbar disc prolapse in 483, lumbar stenosis in 145, lumbar spondylolisthesis in 96, lumbar fracture in 94, lumbar instability in 27, lumbar tuberculosis in 15 spinal tumors in 24 and reoperation in 19. All patients were evaluated by the medical history, clinical examination and review of the imaging data, and then the surgical plan was made respectively according to clinical evaluation. Results Early complications of 78 complications within 2 weeks post-operatively occurred in 76 cases with the incidence of 8.6%(78/903), in-cluding of 49 males and 27 females with an average age of 44.6 years. The complications consisted of 50 nerve root irritations(64.1%, 50/78), most of which relieved at 4 to 30 days after treatment, 9 gastrointesti-nal symptoms(11.5%, 9/78), all of which disappeared at 3 to 10 days but 2 cases needed enema, 4 hematomas of incisional wound(5.1%, 4/78), 4 cerebrospinal fluid leakages(5.1%, 4/78), 3 urinary reten-tions(3.9%, 3/78), 2 deep infections(2.6%, 2/78), 2 deep vein thrombosis(2.6%, 2/78), 2 pulmonary em-bolisms(2.6%, 2/78),1 infection of urinary tract(1.3%) and 1 fatty liquidization(1.3%, 1/78). The opera-tional procedure possible leading to surgical complication were laminectomy, nerve root dissection and in-strumentation. Conclusion Early complications may determine the clinical result of the posterior lumbar spinal operations. Besides the skilled technique, thorough pre-operative planning, close observation and proper management after operation, and early post-operative rehabilitations are of great benefit to the pre-vention and treatment of the complications.

Objective To observe the efficacy of Zishen Anshen Decoction combined with Compound Zaoren (Ziziphi Spinosae Semen) Capsule on insomnia patients with disharmony between heart-yang and kidney-yin syndrome and its effect on sleep quality index. Methods Seventy insomnia patients were randomly divided into treatment group and control group. Both groups conventionally took estazolam as needed, the treatment group was additionally given Zishen Anshen Decoction (in the afternoon and after dinner) and Compound Zaoren Capsule (before sleep at night) for 14 d. The Pittsburgh sleep quality index (PSQI) score and dosage of estazolam were used as evaluation indexes for the comparison between the two groups. Results PSQI score of daytime function disorder and hypnotics dosage of the treatment group was significantly lower than that of the control group, and the dosages of estazolam were reduced (P<0.05). Conclusion The alternative application of Zishen Anshen Decoction and Compound Zaoren Capsule on insomnia treatment can not only improve daytime function, but also reduce the dosage of benzodiazepine, with better effect than estazolam.

BACKGROUND:Previous studies have verified that mesenchymal stem cells could be transplanted into inflammatory bowel mucosa to repair inflammatory bowel tissue. OBJECTIVE:To observe the differential gene expression in large intestine before and after mesenchymal stem celltransplantation in repair of inflammatory bowel tissue of rats using microarray technology, and to primarily discover the main genes during mesenchymal stem celltransplantation, differentiation, and reparation in inflammatory colorectal tissue region. METHODS:Healthy Sprague-Dawley rats were randomly divided into two groups. Experimental rat models of inflammatory bowel disease were established using trinitrobenzene sulfonic acid via enema. At 24 hours after model establishment, green fluorescent protein-labeled mesenchymal stem cells were infused via the caudal vein. The control group was treated with physiological saline by enema, instead of trinitrobenzene sulfonic acid. At 28 days, large intestine was obtained from the experimental group and control group. Differential y expressed genes were screened in the experimental and control groups using microarray technique. RESULTS AND CONCLUSION:The microarray analysis results showed that there were 388 differential genes in the control and experimental groups (P<0.05, FC>2), in which 191 were up-expressed, and 197 were down-expressed. Al of these genes were mainly involved in inflammatory reaction, immune reaction and celldifferentiation. In the top 10 up-regulation and down-regulation differential genes (total y 20 genes), 3 genes were involved in inflammation, 3 genes were involved in immune reaction, and 2 genes were related to stem celldifferentiation. In the 388 genes, 33 were related to signaling pathways (P<0.05), 6 related to inflammation, 8 related to immunity, and 5 related to stem celldifferentiation. Results suggested that the main genes involved in mesenchymal stem cells in repair of inflammatory bowel tissue were primarily screened using gene expression microarray technique.

AIM: The effects of selenium dioxide (SeO_2) on proliferation, apoptosis, intracellular reactive oxygen species (ROS) and Ca~(2+) levels in three leukemia cell lines NB4, K562 and HL-60 were investigated. METHODS: Three leukemia cell lines were treated with 3-30 ?mol/L SeO_2. Flow cytometry was used to detect apoptosis rate, and analyze the changes of ROS and Ca~(2+) level within cells. RESULTS: SeO_2 at 10 and 30 ?mol/L inhibited proliferation in three leukemia cell lines. Treatment with 30 ?mol/L SeO_2 for 48 h induced 54.0%, 46.5%, 49.6% apoptosis in NB4, K562, and HL-60 cells, respectively, and also markedly decreased ROS and Ca~(2+) levels among three cell lines. The rate of ROS positive cells in NB4 and HL-60 decreased with the increase in SeO_2 concentrations. ROS was clearly reduced with 30 ?mol/L SeO_2 in K562. Ca~(2+) levels were tardily declined with 10, 30 ?mol/L SeO_2 in NB4 and HL-60 cells. Ca~(2+) levels were clearly reduced with 30 ?mol/L SeO_2 in K562. CONCLUSION: SeO_2 induces apoptosis in three leukemia cells. The declines of intracellular ROS and Ca~(2+) levels are involved in apoptosis induced by SeO_2.

Objective To observe platelet dynamics in a monkey infected with Plasmodium cynomolgi before and after treatments with antibiotics and antimalarial drug. Methods One experimental monkey was examined for parasite density and platelet count 2 days after parasite inoculation. Observation without treatment continued for 24 days after the parasite was detected in the blood sample of the monkey. Then the monkey was treated with Azithromycin (total 1500 mg) for 3 days. Thirty days after parasite detection in the blood, the monkey was treated with Artesunate for 5 days. Parasite density and platelet count were monitored daily during treatments. The result was compared with that from a healthy monkey as control. Results The experimental monkey's platelet count was 240× 109/L before infection. When parasite density was 2/100 white blood cells (WBC),platelet count increased to 540 × 109/L. During the subsequent period of infection, parasite density fluctuated at (1-60)/100 WBC, and the platelet count reduced to a persistent level of (130-150)×109/L. After the infected monkey was treated with Azithromycin, parasite density reduced initially but subsequently fluctuated at (16-64)/100 WBC. Meanwhile, platelet count was restored to 234.5 × 109/L.The infected monkey was treated with Artesunate and parasite clearance time was 64 hours, and the mean platelet count was 247 × 109/L after treatment. Conclusion Azithromycin and Artesunate treatment have direct influence on the recovery of platelet counts during malaria infection in monkeys.

Objective To investigate the development and dynamic changes of host immune response in DBA/2 mice infected with Plasmodium yoelii 17XL. Methods Female DBA/2 mice were infected by intraperitoneal ( i. p. ) injection of 106 P. yoelii 17XL parasitized erythrocytes ( PRBC). Levels of IL-12, IFN-γ, IL-4, IL-10 and P. yoelii 17XL-specific antibody in sera were measured by ELISA. Concentrations of NO in cell supernatants were measured by the Griess reaction. Parasitemia,percentage of mononuclear-macrophages of individual mice were monitored daily, and phagocytosis of mononuclear macrophages was also observed. Results Primary parasitemia in vein blood was developed on day 3 postinfection, which peaked with a level of 46. 9% on day 9. Most mice cleared the infection and survived by day 20 postinfection. From day 6 to day 16, the phagocytosis of PRBC by rodent macrophages was observed on the blood smear. Infected mice had a continuously increased level of IL-12 in serum from day 1 postinfection. Accordingly, high level of IFN-γ was also detected in sera from day 1 postinfection,which peaked on day 6. Infected mice produced higher level of IL-4 and IL-10 in serum on day 6 postinfection, which peaked on day 9 and day 15 postinfection respectively. In addition, splenocytes from infected mice produced significantly higher level of NO on day 6 and 20 postinfection. Level of P. yoelii 17XL-specific IgG was determined in the sera of infected mice with a steadily increased trend after infection, which peaked on day 70 postinfection. Conclusions Effective polarizing of Thl cells is significant in inhibition of parasitemia and eventual clearance of the Plasmodium parasites. Activated mononuclear-macrophages play a key role in inhibiting parasitemia in the early phase of infection with P. yoelii 17XL.

Objective To construct a lentiviral vector over-expressing β-catenin gene by multisite Gateway technology and confirm its effect.Methods By using multisite Gateway clone technique,the entry clone of pDown-Ctnnb1 was constructed using BP recombination reaction.Then,LR recombination reaction was performed among pUp-EF1A,pDown-Ctnnb1,pTail-IRES/DsRed-Express2 and pLV.Des3d.P/puro to generate an expression clone of pLV.EX3d.P/puro-EF1A＞Ctnnb1 ＞IRES/DsRed-Express2.In each step,PCR and sequencing analysis were used to verify the constructions.When it was verified that plasmids were transfected into 293T cells,PT-PCR was performed to determine the mRNA level of β-catenin gene.Results Both PCR and sequencing analysis revealed that β-catenin over-expression gene was inserted into the target site and the insertion sequence was perfectly corrected.The RT-PCR results showed that the expression of β-catenin gene was significantly upregulated.Conclusion The lenvivirus-mediate β-catenin over-expression gene was successfully constructed..

BACKGROUND:β-catenin is the most critical signaling molecule in the Wnt/β-catenin signaling pathway, which is involved in the regulation of cellproliferation, differentiation and tissue self-healing balance.
OBJECTIVE:To construct a stableβ-catenin over-expression lentivirus-mediated vector and to transfect mesenchymal stem cells line for investigating its effects on proliferation and migration of mesenchymal stem cells.
METHODS:Over-expression vector, PLV-EF1A-catenin-RFP, was constructed and transfected the 293T cellto infect mesenchymal stem cells, and positive cells were selected with puromycin. The up-regulated efficiency of targetingβ-catenin gene at mRNA level was detected by real-time quantitative PCR, the effect on proliferation of mesenchmal stem cellwas assayed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and growth curve, and the migration ability was detected by Transwel motility assay.
RESULTS AND CONCLUSION:The lentiviral vector targetingβ-catenin gene was constructed successful y, and a stable mesenchymal stem cellline that up-regulatedβ-catenin was established. Real-time quantitative PCR results showed that the expression ofβ-catenin gene was efficiently up-regulated by infecting PLV-EF1A-catenin-RFP (P<0.05). The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and growth curve showed that celldoubling time was shortened after infected with pLV-EF1A-catenin-RFP (P<0.05), indicating that the over-expression of theβ-catenin gene successful y increased the proliferative capability of mesenchymal stem cells. The Transwel assay also showed similar increasing results on the migration ability (P<0.01). The lenvivirus-mediated over-expression of theβ-catenin gene can be used to increase the proliferation and migration abilities of the mesenchymal stem cells.

Objective To analyze the epidemic characteristics of the imported malaria cases in Guangxi Zhuang Autono?mous Region in 2014,so as to assess the transmission risk and explore the prevention and control strategy. Methods The data of the malaria epidemic situation in the network direct report system of Guangxi in 2014 and the annual report of malaria epidem?ic situation in 14 cities were collected. The epidemiological information of the imported malaria cases was analyzed. Results A total of 184 malaria patients were reported in Guangxi in 2014,with a descent rate of 85.29%when compared to that in 2013 (1 251 cases),and the incidence rate was 0.35/100 000. All the cases were imported from abroad,and four species of Plasmodi?um were found in their blood samples. The number of falciparum malaria cases was the most(49.46%),followed by the ovale malaria cases(32.07%). All the cases were distributed in 32 counties(districts)of 11 cities ,and 65.76%of them were distrib?uted in Shanglin County. Most of the cases were male(98.37%),and those aged in 20-49 years accounted for 87.50%. The im?ported cases came from 14 countries of Africa(86.41%)and 2 countries of Southeast Asia(13.59%),in which,48.37%of the cases were imported from Garner. The main occupation of the cases in abroad was gold mining work(86.96%). The cases were reported all the year around,with no obvious seasonality. The interval time of back home to attack of the patients with tertian ma?laria and ovale malaria was longer. Conclusion Africa and Southeast Asia is the main source of imported malaria cases in Guangxi,and the migrant workers returning home may have the risk of malaria recurrence,which should be paid enough atten?tion to.

Objective To compare the normal anatomy of the anterior cruciate ligament (ACL) of fresh frozen cadaveric knee specimen in oblique coronal thin-slice section with oblique coronal magnetic resonance imaging. Methods One fresh cadaveric knee specimen was scanned with MR T1-weighted spinecho sequence.then the specimen was frozen and sliced with a band saw along the oblique coronal plane into 1.0-mm-thick sections that corresponded to the MR images,MR images including oblique coronal T1-weighted and T2-weighted images of 50 normal the knee joints were retrospectively reviewed to observe the MR imaging features of the cruciate ligament. Results Anteromedial and posterolateral bundles of ACL were clearly depicted on both anatomic slices and MR images.The anteromedial bundles originated from the posteromedial aspect of the lateral femoral condyle,coursing through the lateral intercondylar notch in an anterior,inferior,and medial direction,and inserted on the anteromedial aspect of the intercondylar eminence. The posterolateral bundles originated from the anteromedial aspect of the lateral femoral condyle,passing laterally and inferiorly through the lateral intercondylar notch,and inserted on the posterolateral side of the intercondylar eminence.The full length of ACL of all 50 individuals was showed on MR images.MRI clearly differenitated the anteromedial and posterolateral bundles of ACL and depicted the full length of the bundles.similar to the findings on sectional anatomy.Conclusion Oblique coronal MR imaging is the best way to demonstrate ACL and should be used for clinically suspected injury of ACL.