3′-deoxy-3′-18F-fluorothymidine has been described recently as a new positron emission tomography (PET) tracer for imaging tumor cell proliferation. In recent years, more and more clinical research demonstrate that 18F-FLT can image tumor cell proliferation during treatment, and can reflect accelerated reproliferation earlier. it can define tumor subvolumes with high proliferative activity preceding volumetric tumor response, and can predict relapse and prognosis according to the changing status during the treatment.

Objective To investigate the current prevalent status of endemic fluorosis in the alluvial plain area of the Yellow River in Shandong Province,in order to provide a scientific basis for developing control measures against the disease.Methods Six counties were selected as survey counties by random sampling,ten improvedwater projects were selected in each survey county,for the projects,the operating effect was investigated and water fluoride content was tested;three epidemic villages were chosen as survey villages in each county,the operating condition and the fluoride level of water were investigated in the villages with water improvement projects.Dental fluorosis of children aged 8 to 12 was surveyed,the urinary fluoride and skeletal fluorosis X-ray diagnosis were checked of adults over the age of 25.Water fluoride and urinary fluoride contents were detected via the F-ion selective electrode method,and the prevalence of dental fluorosis of all children aged 8 to 12 was diagnosed based on Clinical Diagnostic Criteria of Dental Fluorosis (WS/T 208-2011),skeletal fluorosis X-ray diagnosis was done based on the National Standard for Diagnosis of Endemic Skeletal Fluorosis (WS 192-2008).Results ①In the six counties,58 improved-water defluoridation projects were investigated,all projects were operated normally,the qualified rate of water fluoride content was 44.83％ (26/58).②A total of 19 villages that had water-improving and defluoridation projects were investigated,and all projects were operated normally,the qualified rate of water fluoride content was 42.11％ (8/19).③The overall rate of dental fluorosis among children aged 8 to 12 years old was 49.28％ (480/974),with the index of dental fluorosis as 1.01 in 19 villages,the prevalence of dental fluorosis was mild.In the qualified villages of water fluoride concentration,the positive rate of dental fluomsis among children aged 8 to 12 was 33.41％ (148/443),dental fluorosis index was 0.65,and the prevalence of dental fluorosis was extremely low;in the exceeding-standard villages of water fluoride content,the positive rate of dental fluorosis among children aged 8 to 12 was 62.52％ (332/531),dental fluorosis index was 1.36,and the prevalence of dental fluorosis was mild;the detection rate of dental fluorosis among children aged 8 to 12 of the villages with qualified fluoride content was lower than the rate of the villages with excessive fluoride (x2 =81.91,P ＜ 0.01).④X-ray detection rate of skeletal fluorosis in adults over the age of 25 was 6.14％ (53/863) in 17 villages,there was no statistically significant difference between the qualified villages and the exceeding-standard villages of water fluoride concentration (x2 =1.55,P ＞ 0.05),X-ray detection rate of skeletal fluorosis in adults was 5.04％ (20/397) and 7.08％ (33/466),respectively.In the qualified villages and the exceeding-standard villages of water fluoride,urinary fluoride geometric average and the exceeding rate of urinary fluoride were 1.50 mg/L,44.16％ (170/385) and 2.09 mg/L,62.58％ (286/466),respectively.In the qualified villages of water fluoride,the exceeding rate of adult urinary fluoride was lower than that in the exceeding-standard villages (x2 =28.58,P ＜ 0.01).Conclusions The prevention and control measures on endemic fluorosis have had some effects in the alluvial plain area of the Yellow River in Shandong Province.But the water fluoride content of water improving defluoridation projects still exceeds the national standard seriously,and endemic fluorosis has not been effectively controlled.Prevention measures should be further strengthened.

Objective To investigate pulmonary infect flora distribution characteristics of stroke patients with tracheotomy in Intensive care unit (ICU) and analyze the risk factors.Methods A total of 792 cases of ICU stroke patients was selected,including 426 cases of tracheotomy patients,and 366 cases of non-tracheotomy patients.The incidence of lung infections was compared.Bacteriological examination was used for tracheotomy bacteriological studies for lung infected stroke patients with tracheotomy.Bacteria infection's characteristics was observed.The risk factors were analyzed.Results (1) The tracheotomy patient 's lung infection rate was 23.00％,higher than 9.56％ of the non-tracheotomy patients,the difference was statistically significant (X2 =19.125,P ＜0.05);(2) For lung infection-occurred patients with tracheotomy of ICU,gram-negative bacteria infection rate was 63.97％,significantly higher than 19.85％ of gram-positive bacteria and 16.18％ of fungi,the difference was statistically significant (x2 =18.255,17.042,P ＜ 0.01);(3) Lung infection rate of ICU stroke tracheotomy patients with unconscious,dysphagia,hospitalization time ＞ 14 d,blood glucose levels ≥≥7.8 mmol/L,and based diseases was significantly higher than that of patients with conscious,non-dysphagia,hospitalization time ≤＜14 d,blood sugar level ＜7.8 mmol/L,and no based diseases (P ＜ 0.05);(4) Consciousness,dysphagia,hospitalization,blood sugar levels,and the underlying disease were the independent risk factors of lung infection in ICU stroke tracheotomy patients (OR1 =11.528,OR2 =8.046,OR3 =15.174,OR4 =7.795,ORs =10.784,P ＜0.05).Conclusions Gram-negative bacteria is the main reason for pulmonary infections in ICU stroke tracheotomypatients patients with stroke.State of consciousness,invasive treatment,hospitalization,blood sugar levels,and the underlying disease are the independent risk factors.

BACKGROUND: Autologous bone marrow is the only tissue that contains abundant osteoinductive osteogenitor cells and is the first-choice transplantation materials for treatment of bone nonunion. Artificial bone with osteoinductive capacity can provide a supporting effect for the in-growth of osteocytes. Iliac periosteum can be used for treatment of bone nonunion due to the advantages including abundant blood circulation, easy harvesting, and able to improve local arterial blood supply. BJECTIVE: To treat refractory bone nonunion in limbs using artificial bone with autologous bone marrow combined with iliac periosteum transplantation, and to compare the therapeutic efficacy to artificial bone with autologous bone marrow transplantation and simple iliac periosterum transplantation. METHOD: Thirty-nine refractory bone nonunion limbs from 36 patients were assigned to three groups: artificial bone with autologous bone marrow combined with iliac periosteum transplantation (combination group, n = 19), artificial bone with autologous bone marrow (bone marrow group, n = 9), and autologous iliac periosteum (iliac periosteum group, n = 11). The time for bone healing, limb function score 1 month after fixture removal, and postoperative X-ray score were evaluated. RESULTS AND CONCLUSION: All initial 39 limbs acquired bone union and were followed up for an average period of 18.5 months. The combination group yielded better therapeutic effects than the bone marrow group and the iliac periosteum group in terms of the time for bone healing, limb function score 1 month after fixture removal, and postoperative X-ray score (P < 0.05). These findings indicate that artificial bone with autologous bone marrow combined with iliac periosteum transplantation exhibits better clinical therapeutic effects in treatment of refractory bone nonunion in limbs.

Objective To evaluate if 18F-FLT PET imaging could be used as a new clinical method to predict tumor radiosensitivity.Methods MDA-MB-231 and LN229 cells were irradiated with doses of 0,8 and 16 Gy of 6 MV photon energy,then soft agar assay and cellular uptake of 18F-FLT were performed on the 2 cell lines.The t test and one-way analysis of variance were used for the two groups and data before and after irradiation.The MDA-MB-231 and LN229 tumor xenografts were prepared by injecting the tumor cells into the right limbs of female BALB/c nu/nu mice.Once tumors reached a diameter of 10 mm,the two types of mice were divided randomly into 3 groups (20 mice per group) according to the irradiation doses (0,8 and 16 Gy).After irradiation,18F-FLT PET imaging and immunohistochemical staining were conducted.Then correlations between 18F-FLT SUVtumor/SUVmuscle ratio (T/M ratio) and TK1 labeling index percentages (LITK1) were tested using linear correlation analysis.Results The survival fraction of MDA-MB-231 and LN229 cells after irradiated with 8 Gy were (59.73 ± 4.3) ％ and (93.41 ± 3.75) ％,respectively (t =-13.20,P ＜ 0.001).When the dose increased to 16 Gy,the survival fraction decreased to (43.57 ±4.06) ％ and (81.77 ± 4.42) ％,respectively(t =-14.24,P ＜ 0.001).In MDA-MB-231 cells,the cellular uptake of 18F-FLT after irradiation with 8 Gy declined rapidly to (18.32 ± 1.38) kBq/105 cells ((128.22 ± 8.24) kBq/105 cells with the dose of 0 Gy,F =266.41,P ＜ 0.01),and maintained this low level till 72 h.For the LN229 cells,the cellular uptake decreased to (9.87 ± 1.30) kBq/105 cells after 8 Gy irradiation ((134.88 ± 6.59) kBq/105 cells with the dose of 0 Gy,F =346.06,P ＜ 0.01),then increased gradually to (127.17 ± 9.08) kBq/105 cells at 72 h (F =346.06,P ＞ 0.05).The dynamic changes of 18F-FLT cellular uptake in the two cells had the same pattern after being treated with 16 Gy irradiation.In the 18F-FLT PET image of MDA-MB-231 tumor mice after 8 Gy radiotherapy,the T/M ratio decreased to 0.78 ± 0.39 at the first day,but it was 2.84 ± 0.29 before radiotherapy (F =39.78,P ＜0.01).Then the ratio increased slowly,and it was still lower than the baseline at 7 d after radiation (F =39.78,P ＜0.01).The same pattern could be seen in the group of 16 Gy irradiation.In LN229 tumor mice treatment with 8 Gy irradiation,the T/M ratio increased to 2.41 ±0.47 at the first day,and it was 1.58 ±0.29 before radiotherapy (F =34.01,P ＜ 0.05).The ratio decreased steadily to 0.66 ± 0.32 (F =34.01,P＜0.05) at 7 d after radiotherapy.However,in the treatment group with 16 Gy,the T/M ratio decreased gradually and reached 0.44 ± 0.22 at 7 d (F =41.85,P ＜ 0.01).A correlation was found between 18F-FLT T/M ratio and LITK1 (8 Gy:r=0.67,0.73; 16 Gy:r=0.73,0.69; all P＜0.01) in both tumor models.Conclusion 18F-FLT PET imaging may be used as a new assay to predict tumor radiosensitivity,but further investigation is needed before clinical application.

Objective To study the clinical characteristics,treatment and prognosis of neonatal VACTERL association.Method The clinical data of newborns diagnosed with VACTERL association from January 2010 to December 2015 were collected and retrospectively analyzed.Result A total of 33 patients diagnosed with VACTERL association were included,including 23 males and 10 females.Among them,17 cases were term infants,15 cases premature infants and 1 case of overdue birth,with an admission age of 1 to 24 days.The most common deformities were cardiac anomalies (C) in 27 cases (81.8％),followed by anal atresia/anorectal malformation (A) in 25 cases (75.8％),renal deformity (R) in 24 cases (72.7％),limb abnormalities (L) in 20 cases (60.6％),Tracheoesophageal fistula (TEF) in 8 cases (24.2％) and vertebral abnormalities (V) in 3 cases (9.1％).11 cases (33.3％) had other deformities.Among these 33 patients,24 cases had 3 types of malformations and 9 cases had 4 types of malformations.The most common combination was ACR (n =8).20 patients had no abnormalites on chromosome karyotype test including 2 patients had normal gene microarray results.16 patients received surgical treatment during neonatal period and 13 of them recovered and discharged.Among the other 17 cases received no surgery,only 1 patient improved and discharged.A telephone follow-up was proceeded in 14 discharged cases at 1 year old.Among them,13 cases had good prognosis,however,the remaining one was dead.Conclusion VACTERL association is a rare non-random combination of multiple malformations.The early discovery and appropriately treatment after diagnosis will improve the prognosis and prevent death.Doctors should reinforce the ability to detect various types of deformities and examine the chromosome and gene properly.

From July 2006 to April 2008,103 patients(107 hips) undergoing first total hip arthroplasty(THA) were selected from Department of Bone and Joint Surgery,Affiliated Hospital of Luzhou Medical College.According to treatment methods,minimally invasive group(47 cases,47 hips) including 15 cases(15 hips) of necrosis of the femoral head,28 cases(28 hips) of femoral neck fracture,and 4 cases(4 hips) of osteoarthritis,were treated with small posterior skin incision and cementless prosthesis;the routine group(56 cases,60 hips) underwent routine THA.The blood loss,incision length,pain,functional recovery,length of stay,and perioperative complications were recorded.103 patients were followed up,of which minimally invasive THA was followed up for 3-11 months,and routine group followed up for 7-22 months.In the minimally invasive THA group,the patients had less blood loss(P 0.05).The results show that minimally invasive THA has the advantages of less complication,shorter hospital stay,slighter pain and faster function recovery compared to routine THA.

Objective To explore the influence on the expression of elF4E and heparanase by antisense oligodeoxyribonucleotides (ASODN) transfection in human bladder carcinoma BIU-87 cells.Methods After transfecting the 2.5,5.O,7.5 μg/ml eIF4E ASODN into BIU-87 cells,at 24 h,48 h and 72 h,a cell control group (no transfection),a blank control group (empty liposomes) and a non-sense control group (transfected with non-sense ASODN) were established.The expression of eIF4E,HPA and mRNA were detected by in situ hybridration.The expression of eIF4 and HPA protein were detected by immunocytochemistry.SPSS 13.0 statistical software was used for statistical analysis.Results The expression quantity of eIF4E protein and mRNA were lower in the experimental groups ( protein:2.5 μg/ml ASODN treated 24 h,48 h,72 h were:3.55 ±0.52,3.52 ±0.51,3.22.±0.44 respectively; 5.0 μg/ml group:3.43 ±0.47,3.41 ± 0.46,3.19 ± 0.41 respectively ; 7.5 μg/ml group:2.36 ± 039,2.33 ± 0.37,2.05 ± 0.30 respectively.mRNA:2.5 μg/ml treated 24 h,48 h,72 h were:3.19 ±0.41,3.13 ±0.39,2.90 ±0.38 respectively ; 5.0 μg/ml group:3.07 ± 0.39,2.94 ± 038,2.27 ± 0.37 respectively ; 7.5 μg/ml group:2.22 ± 037,2.06 ± 0.30,1.95 ± 0.29 respectively.All data were less than those in the control groups (P ＜0.05).The expression quantity of HPA protein and mRNA were lower in experimental groups (protein:2.5 μg/ml ASODN treated 24 h,48 h,72 h were:4.44 ±0.55,4.40 ±0.54,3.99 ±0.52 respectively; 5.0 μg/ml group:4.41 ±0.55,4.21 ±0.53,3.77 ±0.50 respectively; 7.5 μg/ml group:4.02 ±0.52,3.98 ±0.52,2.32 ±0.37 respectively.mRNA:2.5 μg/ml treated 24 h,48 h,72 h were:4.12 ±0.51,3.75 ± 0.50,3.63 ± 0.45 respectively ; 5.0 μg/ml group:4.00 ± 0.51,3.71 ± 0.50,3.54 ± 0.44respectively ; 7.5 μg/ml group:3.87 ± 0.52,3.61 ± 0.49,2.08 ± 0.30 respectively).All data were less than in control groups ( P ＜ 0.05 ).There was a positive correlation on expression of HPA protein and eIF4E protein by inhibitory effect of eIF-4E ASODN (protein r=9.23,mRNA r=9.59,P ＜0.01).Conclusion eIF-4E ASODN might be used to inhibit the expression of eIF-4E gene and HPA gene in bladder cancer BIU-87 cells.

Objective To investigate the effect of di-(2-ethylhexyl) phthalate (DEHP) on the postnatal lung development in newborn rats.Methods A total of 60 newborn Sprague-Dawley rats (weighing 5.0-8.0 g) in five age groups were studied in the first experiment.The rats were divided based on the different postnatal ages:postnatal day (PND)I,PND4,PND7 and PND14.A total of 45 newborn Sprague-Dawley rats (weighing 5.0-8.0 g) were randomly divided into three groups according to the dosage of DEHP administered in the second experiment.The newborn rats were administered DEHP through intraperitoneal injection at 10 (low-dose subgroup),100 (medium-dose subgroup) or 750 (high-dose subgroup) mg/kg daily from PND1 to PND13.The rats were sacrificed on PND14.Pups were sacrificed with lethal dose injection of pentobarbital sodium.The lung was removed.The right middle lobes were used for analysis.The tissue was processed for histology and lung sections were stained with HE for light microscopic (LM) morphometric measurement.The analysis was performed by means of a digital image analysis system,including pulmonary interstitial area ratio (IAR) and total length density of all segments.One-way ANOVA,LSD and Dunnet T3 methods were used for statistical analysis.Results In the normal controls,IAR decreased significantly by (31.97±5.03) ％,(30.05±3.57)％,(25.33± 1.83)％ and(22.01 ±2.19)％,respectively,from PND1 to PND14 (P＜0.05 or P＜0.01).IAR in medium-and high-dose subgroups increased significantly by (24.11 ±2.78)％ and (26.53± 3.42)％,respectively on PND 14.The total length density of all segments in unit area lung volume increased significantly by 0.047 8±0.003 7,0.050 0±0.002 9,0.071 2±0.003 0 and 0.084 4±0.004 3,respectively from PND1 to PND14 (P＜0.01).In the DEHP treated animals,when compared with the control group,IAR was significantly higher on PND14 (P＜0.05 or P＜0.01),while the total length density of all segments in unit area lung volume was significantly decreased (P＜0.05 or P＜0.01).Length density in medium-and high-dose subgroups were higher than that of low-dose subgroup by 0.082 9±0.001 8,0.077 2±0.002 0 and 0.071 3±0.003 7,respectively on PND14 (P＜0.05 or P＜0.01).Conclusions Medium-and high-dose DEHP affect the postnatal lung development in rats in a dose-dependent mode.

Objective To understand the status of endemic fluorosis in Shandong Province.Methods In accordance with the requirements of the National Surveillance Scheme of Drinking-Water-Type Endemic Fluorosis (Trial) and Shandong Provincial Surveillance Scheme of Drinking-Water-Type Endemic Fluorosis (Trial),ten counties (cities,districts) were chosen in the province,and ten water-improvement projects were selected in each county (city,district).The operating effect of water-improvement projects was investigated; one peripheral water sample of each project was collected,and water fluoride content was tested.Three epidemic villages were chosen as fixed monitoring villages in each county (city,district).In the villages that had changed water source,one peripheral water sample was collected; in unchanged water source villages,one water sample was collected following five different directions of the east,the west,the south,the north and the center of the water source location; and the water fluoride content was tested.All students aged 8 to 12 were checked for dental fluorosis in the monitoring villages.The fluoride content in drinking water was detected by fluoride ion selective electrode method,and dental fluorosis was diagnosed by Dean's method.Results ① In the 10 counties (cities,districts),a total of 85 water-improving projects were monitored,and all the projects were in normal operation; the water fluoride contents of 47 projects were qualified,and the qualified rate of water fluoride content was 55.29％(47/85),with the maximum of water fluoride content was 4.74 mg/L.② In the 30 fixed monitoring villages,27 monitored villages had water-improving projects; water fluoride contents of 19 villages were qualified,the qualified rate of water fluoride content was 70.37％ (19/27),with the maximum of water fluoride content was 4.77 mg/L.In the 3 monitored villages without water-improving projects,villages of mean water fluoride contents ≤ 1.20 mg/L and ＞ 1.20 mg/L were two and one,respectively,with the maximum of water fluoride content was 1.55 mg/L.③ In the 19 monitored villages with water-improving projects that in normal operating condition with qualified water fluoride content,the detected rates of dental fluorosis and the defect type of dental fluorosis among children aged 8 to 12 years old were 52.37％(508/970) and 6.39％(62/970),respectively,and the index of dental fluorosis was 1.02.In the 8 monitored villages with water-improving projects that in normal operating condition with water fluoride content that exceeded the national standard,the detected rates of dental fluorosis and the defect type of dental fluorosis were 62.39％ (297/476) and 8.82％ (42/476),respectively,and the index of dental fluorosis was 1.67.In the 3 monitored villages without water-improving projects,the detected rates of dental fluorosis and the defect type of dental fluorosis were 49.45％ (90/182) and 7.14％ (13/182),respectively,and the index of dental fluorosis was 1.25.Conclusions In Shandong Province,the water fluoride content of water-improving defluoridation projects exceeds the national standard seriously,and water quality of the projects still need to be further improved.The projects of water-improving defluoridation play a certain role in control of dental fluorosis condition,but the condition of children' s dental fluorosis is still very serious.So preventive and control measures for endemic fluorosis should be further strengthened.