Objective:To investigate the possible role of miR-181d in regulating the multidrug resistance (MDR) of small cell lung cancer (SCLC) and its clinical significance. Methods: Quantitative reverse transcriptase-polymerase chain reaction (QRT-PCR) and Western blot were used to investigate the differential expression of miR-181d and BCL2 from mRNA and protein levels in the chemo-sensitivity cell H69 and the chemo-resistance cell H69AR. The miR-181d expression in H69AR was then upregulated. More-over, CCK8 assay was employed to detect the sensitivities of the cells to chemotherapy drugs, such as ADM, DDP, and VP-16. Mean-while, the expression of miR-181d in the specimens of 87 cases with SCLC were detected using QRT-PCR. All patients received the chemotherapeutic regimen of EP (etoposide+cisplatin). Correlation of the miR-181d expression with clinicopathological features, prog-nosis, and survival time of the patients was studied. Results:miR-181d was downregulated in the SCLC multidrug-resistant cell line H69AR and chemo-resistant patients. Moreover, miR-181d was concurrent with the upregulation of BCL2 protein compared with the parental H69 cell line and chemo-sensitive patients (P<0.001). miR-181d expression in H69 cells resistant to chemotherapy drugs (ADM, DDP, and VP-16) was inhibited (P<0.01). Enforced miR-181d expression reduced the BCL2 protein level and sensitized H69AR cells to chemotherapy drugs (P<0.01). miR-181d expression was associated with tumor stage, sensitivity of chemotherapy, and survival time (all P<0.001). Patients with high miR-181d expression had longer overall survival and progress-free survival time com-pared with those with low miR-181d expression (P<0.001). Conclusion: miR-181d may play a role in the development of MDR in SCLC and may be a potential predictive factor for treatment efficacy.

Objective To investigate the function of acid pocket in reflux esophagitis. Methods The 15 healthy controls and 24 reflux esophagitis patients were identified by reflux disease questionnaire (RDQ) and gastric endoscopy. The location of subjects' lower esophageal sphincter (LES) was determined by 4 channel esophageal manometry system. Then a single-channel pH electrode was positioned 1 cm below the distal border of the LES to monitor fasting pH for half an hour. After a standard meal, the pH was continuously measured for two hours. Then the electrode was moved to 5 cm above the proximal border of the LES to monitor the dynamic pH for 24 h.Results Acid pocket was found in 16 cases of reflux esophagitis patients(66.67%) and 10 cases of healthy individuals (10/15). Acid pocket occurred earlier in reflux esophagitis group than healthy controls [11.00(4.25-17.00) min vs 30.00(15.50-54.25) min, P＜0.05], and the average pH value was lower [1.84(1.59-2. 19) vs 2.32 (1.96-2.71), P＜0.05]. There was no statistic difference in mean pH value of gastroesophageal junction and the duration of acid pocket before the meal.Conclusion There is abnormal acid reflux in reflux esophagitis patients, and acid pocket with earlier occurrence and lower pH value may relevant to esophageal mucosal impairment.

Objective To investigate the dose-effect effects of th ree relating bone growth factors, dexamethasone, recombinant human basic fibro blastic growth factor (rhFGF) and recombinant human bone morphogenetic protein- 2 (rhBMP-2), on proliferation and differentiation of periosteal cells so as to provide experimental basis for their further application in bone tissue engineer ing. Methods Periosteal cells were isolated and cultured in vitro and then exposed to dexamethasone (10 -8 mol/L, 10 -7 mol/L and 10 -6 mol/L), rhFGF (50 ng/ml, 200 ng/ml and 500 ng/ml) and rhBMP-2 (50 n g/ml, 500 ng/ml and 1 000 ng/ml) respectively. At the 4th and 7th days respectiv ely, the culture stopped and the total protein and alkaline phosphatase (ALP) ac tivities were measured. ResultsDexamethasone at concentratio n of 10 -6 mol/L significantly inhibited protein synthesis without obvious effects on ALP expression. The rhFGF at various concentrations significantly pro moted cell proliferation but inhibited ALP activity. The rhBMP-2 at various con centrations exerted insignificant effect on cell proliferation. In comparison, A LP expression was significantly enhanced by treatment of rhBMP-2 at concentrati on of 500 ng/ml and 1 000 ng/ml ( P

ObjectiveTo analyze the transitional shifts between with different sets of cone-beam computed tomography (CBCT) and the planning CT for liver cancer patients,and calculate the margins from clinical target volume (CTV) to the planning target volume (PTV)with and without image guided radiotherapy (IGRT).MethodsFive liver cancer patients received radiotherapy after transcatheter arterial chemoembolization (TACE).The first CBCT images (CBCT1) were obtained with Elekta CBCT plus active breathing control (ABC) system before treatment.The second CBCT images (CBCT2 ) were obtained after correcting the set-up errors and the third CBCT images ( CBCT3 ) were obtained after treatment.The CBCT images were registered and matched with the planning CT images using lipiodol as a direct surrogate for target localization.The PTV margins were calculated by comparing the shift between planning CT and CBCT according to formula M =2.5 ( Σ doctor2 + Σ set-up2 + Σ transter2 )1/2.Paired t-test was used to compare the differences between the results from CBCT1,CBCT2 and CBCT3. Results The average transition shifts in the left-right ( LR),superior-inferior (SI) and anterior-posterior (AP) directions were 0.254,-0.612,0.314 cm between planning CT and CBCT1 ;were 0.020,0.014,-0.064 cm between planning CT and CBCT2 ;and they were -0.004,0.042,-0.040 cm between planning CT and CBCT3.The PTV margins were LR 0.96 cm,SI 0.96 cm and AP 0.83 cm without IGRT,and LR 0.67 cm,SI 0.68 cm and AP 0.58 cm with IGRT.ConclusionsThe PTV margins can be reduced by 3 mm with IGRT for liver cancer using lipiodol as a direct surrogate for target localization.

Objective To investigate the combination effect of tramadol and low dose propofol on emergence agitation in children receiving sevoflurane for adenotonsillectomy procedure. Methods Ninety patients receiving sevoflurane for adenotonsillectomy procedure were randomly divided into control group (administration of 0.1 mL/kg normal saline 30 min before the end of operation), tramadol group (administration of 1 mg/kg tramadol 30 min before the end of operation) and tramadol + propofol group (administration of 1 mg/kg tramadol 30 min before the end of operation and 1 mg/kg propofol at the end of operation). Time of extubation and time stayed in postanesthetic care unit (PACU) after operation were recorded, scores of Pediatric Anesthesia Emergence Delirium ( PAED) Scale, modified Aldrete scores and pain scores were obtained immediately after entrance into PACU, and the prevalences of post-operative nausea and vomiting were observed. Results There was no significant difference in time of extubation, time stayed in PACU and modified Aldrete Scores among groups (P >0.05). There were significant differences in scores of PAED Scale immediately after entrance into PACU, with control group > tramadol group > tramadol + propofol group (P < 0.05). The pain scores of tramadol group and tramadol + propofol group were significantly lower than that of control group (P < 0.05). The prevalence of nausea and vomiting was the highest in tramadol group, and the prevalence in tramadol + propofol group was significantly lower than that in tramadol group ( P < 0.05). Conclusion The combination use of tramadol and low dose propofol can decrease the severity of emergence agitation in children receiving sevoflurane for adenotonsillectomy procedure, and reduce the prevalence of nausea and vomiting.

A HPLC method was established to determine the contents of the five anthraquinones and rhaponticin in the different varieties of Rhei Radix et Rhizoma. The difference existed in different varieties. The results showed that rhein and rhaponticin were marker substances which could be used to distinguish palm leaf groups rhubarb and wave leaf groups rhubarb. Authentic rhubarb didn't contain rhaponticin. Falsify rhubarb contains trace amounts of rhein. Rheum tanguticum contains abundant rhein. The ratio value of the content of rhein to chrysophanol could be used to distinguish R. tanguticum from the other two authentic varieties (R. palmatum and R. officinale). The content of rhaponticin varied largely in different varieties of wave leaf groups rhubarb.
Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; Quality Control ; Rheum ; chemistry ; classification ; Rhizome ; chemistry ; classification

BACKGROUND: Mesenchymal stem cells (MSCs), with low immunogenicity, can regulate cellular immunity and mitigate graft rejection, which has a good prospect in tissue engineering. However, it is rarely present in bone marrow. OBJECTIVE: To explore an isolation and culture method of the rabbit bone marrow-derived MSCs, to observe the biological characteristics and differentiation potential of bone marrow-derived MSCs.METHODS: MSCs were isolated from rabbit tibia bone marrow by combination of gradient centrifugation and different adherent method, then proliferation in vitro. Morphology was examined by phase contrast microscopy, and the growth curve of cultured MSCs was drawn via MTT results. MSCs were treated with osteogenetic inductor (L-DMEM/F12, 10% fetal bovine serum, 0.1 μmol/L dexamethasone, 200 μmol/L vitamin C, 10 mmol/L β-phosphoglycerol), adipose inductor (L-DMEM/F12, 10% FBS, 1 μmol/L dexamethasone, 200 μmol/L antifani, 0.5 mmol/L IBMX, 10 μg/mL insulin), and chondrocytes inductor (L-DMEM/F12, 10% FBS, 10 μg/L TGF-β1, 0.1 μmol/L dexamethasone, 50 μmol/L vitamin C, 6.25 mg/L insulin) to differentiated into osteoblast, dipocytes and chondrocytes. And the differentiated cells were identified by alkaline phosphatase staining, oil red O staining, and toluidine blue staining, respectively.RESULTS AND CONCLUSION: Bone marrow-derived MSCs can be isolated and cultured by the combination of gradient centrifugation and different adherent method in vitro, which have the better potentiality of proliferation and multi-directional differentiation. Mostly of the primary and passaged cells were spindle-shaped. After osteogenetic induction, cells were positive to alkaline phosphatase staining. Oil red O staining showed that red lipid droplet existed in adipose cells, and toluidine blue staining showed that toluidine blue was positive after chondrocytes induction.

Objective To investigate the clinical efficacy of Du meridian moxibustion in treating polycystic ovarian syndrome of spleen-kidney yang deficiency type. Methods Seventy patients with polycystic ovarian syndrome of spleen-kidney yang deficiency type were randomly allocated to treatment and control groups, 35 cases each. The treatment group received Du meridian moxibustion plus medication and stomach and the control group, medication alone. Sex hormones [follicle-stimulating hormone (FSH), luteinizing hormone (IH) and testosterone (T)], fasting insulin (INS), fasting blood glucose (GLU), body mass index (BMI) and changes in menstrual cycle were observed in the two groups before and after three weeks of treatment. The clinical therapeutic effects were compared between the two groups. Results The total efficacy rate was 94.3%in the treatment group and 77.1%in the control group;there was a statistically significant difference between the two groups (P＜0.05). There were statistically significant pre-/post-treatment differences in LH, LH/FSH and T in the two groups (P＜0.01, P＜0.05). There were no statistically significant post-treatment differences in sex hormones between the two groups (P>0.05). There were statistically significant pre-/post-treatment differences in INS, BMI and menstrual cycle in the treatment group (P＜0.01, P＜0.05). There was a statistically significant pre-/post-treatment difference in menstrual cycle in the control group (P＜0.05). There were no statistically significant post-treatment differences in INS, GLU, BMI and menstrual cycle between the two groups (P>0.05). Conclusion Du meridian moxibustion is an effective way to treat polycystic ovarian syndrome of spleen-kidney yang deficiency type. It can improve insulin resistance and insulin sensitivity.

Objective To investigate the effects of diclofenac sodium suppositories on emergence agitation after sevoflurane maintenance in children undergoing adenotonsilleetomy. Methods Forty-five patients selected for adenotonsillectomy were randomly divided into three groups (n=15). Patients in group 1 were given diclofenac sodium suppositories 12.5 mg right after intubation, those in group 2 were given diclofenac sodium suppositories 12.5 mg immediately after operation, while those in control group were not treated with diclofenac sodium suppositories before or after operation. The extubation time and time spent in post-anesthctic ICU (PACU) were recorded, the modified Aldrete score and pain score were assessed after entrance into PACU, and pediatric anesthesia emergence delirium (PAED) scale was administered 10, 20 and 30 rain after entrance into PACU. Results There was no significant difference in extubation time and time spent in PACU among three groups(P>0.05). Ten minutes after entrance into PACU, the PAED score of group 1 was significantly lower than those of group 2 and control group(P<0.05), while there was no significant difference between the latter two groups(P>0.05). Twenty and thirty minutes after entrance into PACU, the PAED scores of group 1 and group 2 were significantly lower than that of control group(P<0.05). There was no significant difference in the modified Aldrete score right after entrance into PACU among three groups. The pain scores of group 1 and group 2 were signifiantly lower than that of control group(P< 0.05). Conclusion Diclofenac sodium suppositories can decrease the incidence and severity of emergence agitation after sevoflurane maintenance in children undergoing adenotonsillectomy.

Objective To detect the impact of reactive oxygen species ( ROS) on mitochondrial morphology and distri-bution during mitosis.Methods A viral vector in which the fluorescence gene was specifically under the control of mito-chondrial promoter was constructed and confirmed through DNA sequencing and Western blotting.After transfecting HeLa s3 cell with packaged virus, the HeLa s3-COX4tp-EGFP cell line stably expressing the mitochondrial fluorescence signal was obtained.With immunofluorescent staining, the impact of ROS on the morphology and distribution of mitochondria dur-ing mitosis was inspected.Result The cell line constantly expressing mitochondrial fluorescence signals was successfully constructed.Meanwhile,it was found that H2 O2 treatment could significantly change the morphology and distribution of mi-tochondria during mitosis by confocal microscopy.Conclusion Our study demonstrates that ROS can affect the morphology and distribution of mitochondria during mitosis.This research help study the relationship between the mitochondrial function and the regulation of mitosis in the future.