BACKGROUND: As the selective susceptible region following cerebral injury, hippocampus was found to be more sensitive to the extrinsic stimulation which would stimulate hippocampus region, then result in post-traumatic excessive expression of some immediate early genes, over release of excitatory amino acid and delayed death of nerve cells.OBJECTIVE: To study the relationship between the expression of nitrogen monoxide (NO) and endothelin and the apoptosis of nerve cell in cerebral hippocampus region following brain laceration.DESIGN: A comparative study based on paired t test and multiple linear correlative analysis.SETTING:Neurosurgery Department of Kailuan Hospital Affiliated to Northern China Coal Medical College.MATERIALS:This study was carried out at Molecular Biological Laboratory of Northern China Coal Medical College, from February to June 2003. Totally 126 healthy male Wistar rats, grade two, with body mass of 250-350 g,were randomly divided into three groups: experimental group and control group of 60 rats, normal group of 6 rats, moreover the experimental group and control group were subdivided into 0.5 hour, 1 hour, 3 hours, 6 hours,12 hours, 24 hours, 72 hours, 120 hours, 168 hours, 240 hours time point subgroups with 6 rats in each subgroup.METHODS: Left parietal lobe laceration model was established on experimental rats by modified Feeney's free-drop traumatic method; rats in control group were only subjected to parietal skull opening without injury; rats in normal group were received no treatment. The level of Serum NO and endothelin, as well as the number of apoptosis nerve cell at hippocampus region were detected at each time point by using nitric acid deoxidase method, ELISA and in situ terminal labeled technique(TUNEL).MAIN OUTCOME MEASURES: Level of serum NO and endothelin,apoptosis of nerve cells in hippocampus region following brain laceration.RESULTS: Data of 126 rats were statistically analyzed without loss. ① The expression of serum NO, endothelin and apoptosis of nerve cells in hippocampus region of experimental rats: All amounted to the peak level at post-Iaceration 6 hours [(81.45±2.41) mmol/L, (20.29 ±1.63) ng/L], which began to decline from onset of 12 hours [(66.11±1.97) mmol/L, (20.14±1.63)ng/L]. The level of NO at each time point from post-laceration 0.5 hour to 120 hours, and the level of endothelin of from 0.5 hour to 168 hour were significantly higher in experimental group in contrast with normal group and control group (t=3.33-27.91, P ＜ 0.01). ② The apoptosis of nerve cells in hippocampus region of experimental rats: The apoptosis reached to the top at post-laceration 168 hours (27.33±l.86)x102/mm2, which began to decline at 240 hours (21.67±2.07) ×l02/mm2. No apoptosis cells could be observed in normal hippocampus, and less in control group. ③ The correlation of the level of NO and endothelin with the number of apoptosis of nerve cells in hippocampus region: There was obviously positive correlation (r=0.838, P ＜ 0.01; r=0.281, P ＜ 0.05).CONCLUSION: There are definite correlation between the level of NO and endothelin and the number of nerve cells of apoptosis at hippocampus following cerebral laceration. NO and endothelin interacted each other,which involved in the pathophysiological process of cerebral laceration, and consequently resulted in the apoptosis of nerve cells in hippocampus region.

Adult ; Femur Head Necrosis ; chemically induced ; drug therapy ; Glucocorticoids ; therapeutic use ; Humans ; Male ; Paraquat ; poisoning

Objective To evaluate the association between R353Q polymorphism of the coagulation factor Ⅶ gene and cerebral infarction in Chinese Han people. Methods Restriction fragment length polymorphism(PCR-RFLP) methods was adopted to detect FⅦR353Q genotype and R、Q allelomorphie gone frequency of 100 cerebral infarction(CI) patients and 106 healthy people. Results There was FⅦR353Q polymorphism in the CI patients and healthy subjects. RR and RQ genotype could be found in the control group and CI group. RR and RQ genotype dis-position consistented with Hardy-weinberg equilibrium. In CI group,RR genotype was in 91 cases,RQ was in 9 cases and QQ in 0 case(the distribution frequencies were 91.00% ,9.00% and 0), and in the healthy subjects, those are 94 cases, 12 cases and 0 case(88.70% ,11.30% and 0). In the control group and CI group,R allele genotype fre-quencies were 94.33% and 95.50%, and Q were 5.67% and 4.50%. There was not significantly different in the R353Q polymorphism (χ20.3027, P=0.5822);Q allele genotype was not significantly different between the cases of control group and CI patients(χ20.2865, P=0.5925). Conclusion There are the FⅦR353Q polymorphism in Han population,however,the idea that the Q allele is a protective factor in CI is not supported.

Objective To evaluate the value of ultrasonographic measurement of the antral crosssectional area (CSA) in assessing the preoperative gastric content volume in preschool pediatric patients.Methods Fifty American Society of Anesthesiologists physical status Ⅰ or Ⅱ pediatric patients of both sexes,aged ＜7 yr,undergoing elective non-gastrointestinal surgery,were fasted according to the preoperative fasting guidelines recommended by American Society of Anesthesiologists.Sedation was performed with intravenously injected midazolam or with intravenously injected midazolam and propofol after admission to the operating room.The antral CSA in the supine and right lateral decubitus positions was measured using bedside ultrasonography and free tracing method.A gastric tube was inserted after gastric sonography to collect the gastric fluid,and the total volume of the gastric fluid was considered to be the gastric content volume.Results Six pediatric patients were excluded due to the unsatisfactory ultrasound image,and 44 pediatric patients were included.Gastric content volume and gastric content volume per kilogram of body weight were positively correlated with the antral CSA in the right lateral decubitus position,and the Spearman correlation coefficients were 0.48 (P＜0.01) and 0.37 (P＜0.05),respectively.There was no correlation between gastric content volume and gastric content volume per kilogram of body weight and the antral CSA in the supine position (P＞0.05).Conclusion Ultrasonographic measurement of the antral CSA in the right lateral decubitus position can be used to assess the preoperative gastric content volume in preschool pediatric patients.

OBJECTIVE: To investigate the clinical effects of the combined modality therapy for the patients with difficult-to-treat rhinosinusitis (DTRS). METHOD: The clinical data involving 42 patients with DTRS were analyzed retrospectively. All patients received revision endoscopic sinus surgery (ESS) and combined modality therapy systematically and individually. The clinical effects of all patients were observed 6- and 12-month following revision ESS. RESULT: Forty-two patients were followed up for 6 months, whereas 35 patients were followed for 12 months post operation. VAS scores of the patients significantly improved (P < 0.01) 6- and 12-month after revision ESS, but there was no statistic difference (P > 0.05) between 6- and 12-month post operation. Moreover, Lund-Kennedy scores by endoscopy significantly improved (P < 0.01) 6- and 12-month following ESS. Similarly, there was no statistic difference (P > 0.05) between 6- and 12-month postoperatively. Additionally, within 6 months follow-up, 16 of 42 patients (38.1%) were cured, 19 of 42 patients (45.2%) were improved, and 7 of 42 patients (16.7%) were ineffective. The total effective rate in all patients was 83.3% 6 months postoperatively. While within 12 months follow-up, 11 of 35 patients (31.4%) were cured, 15 of 35 patients (42.9%) were improved, and 9 of 35 patients (25.7%) were ineffective. Hence, the total effective rate in 35 patients was 74.3% after 12-month follow-up. There was no statistic difference (χ² = 1.019, P > 0.05) between 6- and 12-month postoperatively. CONCLUSION Appropriate revision ESS plus the combined modality therapy has been proven to be an effective method for the treatment of DTRS. The clinical effects in this study are significant and stable, and thus it is worthy of further clinical applications.
Combined Modality Therapy ; Endoscopy ; Humans ; Nasal Surgical Procedures ; Paranasal Sinuses ; surgery ; Postoperative Period ; Reoperation ; Retrospective Studies ; Rhinitis ; surgery ; therapy ; Sinusitis ; surgery ; therapy ; Treatment Outcome

Objective To evaluate the changes in the expression of NRF-1 in the spinal cord during remifentail-induced hyperalgesia in a rat model of incisional pain.Methods Forty-eight Sprague-Dawley rats,weighing 180-220 g,were randomly divided into 4 groups (n =12 each) using a random number table:control group (C); incisional pain group (group Ⅰ); remifentanil group (group R); incisional pain + remifentanil group (group Ⅰ + R).All the rats were anesthetized with sevoflurane.A 1-cm longitudinal incision was made through skin,fascia and muscle of the plantar aspect of the right hindpaw in I and I + R groups.In C and I groups,normal saline was subcutaneously infused for 30 min.In group I + R,remifentanil (0.04 mg/kg,0.4ml) was subcutaneously infused for 30 min starting from the onset of skin incision.Paw withdrawal threshold to mechanical stimulation (PWMT) was measured at 24 h before operation and at 2,6,12,24 and 48 h after operation.After measurement of PWMT at 48 h,the rats were sacrificed and L4,5 segments of the spinal cord were removed rapidly to detect the expression of nuclear respiratory factor 1 (NRF-1) by immunofluorescence and Western blot.Results Compared with group C,PWMT was significantly decreased at each time point after operation,and the expression of NRF-1 in the spinal cord was up-regulated in I and I + R groups (P ＜ 0.05).Compared with group I,PWMT was significantly decreased at each time point after operation,and the expression of NRF-1 in the spinal cord was up-regulated in group I + R (P ＜ 0.05).Conclusion Up-regulation of NRF-1 expression in the spinal cord may be involved in the development of remifentail-induced hyperalgesia in a rat model of incisional pain.

Objective To explore the effects of adriamycin-loaded immuno-nanoparticles on multidrug resistance (MDR) of hepatoma cell line SMMC-7721/ADM. Methods The cytotoxicity of the adriamycin-loaded immuno-nanoparticles on the bepatoma cell line SMMC-7721/ADM in vitro and the tumor cell-binding ability of adriamycin-loaded immuno-nanoparticles were detected. Results The effect of the cytotoxicity of adriamycin-loaded immuno-nanoparticles on the hepatoma cell line SMMC-7721/ADM was significantly better than that of adriamycin-loaded nanoparticles. Adriamycin-loaded immuno-nanoparticles had the specific binding ability with the hepatoma cell line SMMC-7721/ADM. Conclusions Adriamycin-loaded immuno-nanoparticles can overcome the MDR of the tumor in vitro. The mechanism may be that immuno-nanoparticles could adhere to the tumor cell membrane, and the release of the loaded adriamycin creates a high local concentration in the extracellular medium. The increased concentration gradient improves the diffusion of adriamycin from the extracellular medium to the intracellular medium.

OBJECTIVETo study the effect of sophoridine against bone cancer pain in bone cancer pain model rats induced by W256 tumor cells and its mechanism.

METHODThe rat model of bone cancer pain was reproduced by injecting W256 tumor cells into the rat marrow cavity. Ten days after the model establishment, 36 rats were selected and randomly divided into the model control group and the sophoridine treated group. At the same time, other 10 rats with sham-operation were selected to be the normal control group. Since the 15th day after the operation, rats in the treated group had been given sophoridine (25 mg x kg(-1)) for 10 days. The mechanical withdrawal threshold and the thermal withdrawal latency of each group were measured before and after the treatment. After the last treatment, the radiological and histopathological observation shall be conducted for sick legs of all rats. The expressions of cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) in tumor tissues were detected by mmunohistochemistry.

RESULTSophoridine could significantly increase the mechanical withdrawal threshold and the thermal withdrawal latency (P < 0.05, P < 0.01), significantly relief the bone injury caused by W256 tumor cells (P < 0.05), and notably down-regulate the COX-2 and VEGF expressions in tumor tissues (P < 0.05).

CONCLUSIONSSophoridine has the effect in relieving pain and inhibiting tumor progression in bone cancer pain rats induced by W256 tumor cells. Its mechanism may be related to the down-regulated expressions of COX-2 and VEGF.

Alkaloids ; pharmacology ; therapeutic use ; Animals ; Bone Neoplasms ; complications ; Cell Line, Tumor ; Cyclooxygenase 2 ; metabolism ; Female ; Gene Expression Regulation, Neoplastic ; drug effects ; Hyperalgesia ; complications ; drug therapy ; Pain ; complications ; diagnostic imaging ; drug therapy ; metabolism ; Quinolizines ; pharmacology ; therapeutic use ; Rats ; Rats, Sprague-Dawley ; Tomography, X-Ray Computed ; Vascular Endothelial Growth Factor A ; metabolism

Objective To investigate the epidemiological characteristics of incipient neonatal hyperbilirubinemia. Methods The clinical data of admitted neonates with hyperbilirubinemia were retrospectively analyzed from June 2012 to May 2013. Results Two hundred and eight-four neonates with hyperbilirubinemia were enrolled and the ratio of male:female was 1.51:1. For the causes of hyperbilirubinemia, the incidences of ABO hemolytic and sepsis were higher in term infants than those in preterm infants, and the incidences of pneumonia, necrotizing enterocolitis and intracranial hemorrhage were higher in preterm infants than those in term infants (P<0.05). Compared with the preterm infants, the term infants had jaundice appearance and peak at earlier time, shorter duration of jaundice, faster decline rate of jaundice, higher levels of albumin and indirect bilirubin at the peak of jaundice (P<0.01). In the term infants, the time of jaundice appearance and peak were earlier in hemolytic group than those in non-hemolytic group (P<0.05). In preterm infants, the peak of transcutaneous bilirubin was higher in hemolytic group than that in non-hemolytic group (P<0.05). Six cases with bilirubin encephalopathy had abnormalities cranial MRI imaging, and the MRI was not entirely consistent with the peak level of bilirubin. Conclusions There are clinical differences between hemolytic and non-hemolytic hyperbilirubinemia in both term and preterm infants.

Objective To screen for microRNA (miRNA) involved in fetal rat lung development.Methods Fetal lungs were collected at their 16 d,19 d and 21 d of gestational age,and were observed after HE staining.Differentially expressed miRNA (fold change＞ 1.0) were screened by miRCURYTM locked nucleic acids chip.Some differentially expressed miRNA were selected for further analysis to investigate their change trends in 16 d,19 d and 21 d of gestational age.Results (1) Under the observation after HE staining,in gestational age 16 d group,original bronchus was dendritic distributed,with thick interstitial,rare capillary and no alveolar structure existed; in gestational age 19 d group,primary alveolar was seen,interstitial became thinner,and more capillaries were found; in gestational age 21 d group,more alveolar septa were identified and pulmonary acinus cavity was extremely expanded.(2) Two hundred and two differentially expressed miRNA were found.Among them,many miRNA were firstly reported in rat fetal lung development,suchas miRNA-3560 (8.4211415,4.8889050),miRNA-126 * (7.5239524,1.5118160),miRNA-186* (0.980 325 0,0.688 447 5),miRNA-466c* (0.977 220 0,0.877 227 0),miRNA-195 (13.549 629 0,0.985 488 8),miRNA-34a (12.426 133 0,0.604 066 2) and miRNA-466b-1 *(0.993 153 1,1.732 802 3).(3)The expression of miRNA-466c * and miRNA 186 * decreased as the gestational age increased from 16 d to 21 d,while expression of miRNA-195,miRNA-3560,miRNA-466b-1 *,miRNA-126 * and miRNA-let-7b increased; miRNA-34a expression increased during 16 d to 19 d.miRNA 17-92 family expression decreased,while expression of most let-7 family members (except let-7i and let-7e) increased from 16 d to 21 d of gestational age.Conclusions These miRNA might play an important role in the physiological mechanisms of fetal lungs development.