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Objective:To evaluate the effects of high mobility group protein box 1 (HMGB1) on clinical prognosis of esophagus squamous cell carcinoma (ESCC) patients treated with chemoradiotherapy and the radiosensitivity of xenograft in nude mice.Methods:A total of 90 endoscopic biopsy specimens were obtained from ESCC patients treated with chemoradiotherapy. The expression level of HMGB1 was determined by immunohistochemical staining. High expression level was defined when staining was observed on ≥50% of the tumor cells. All patients were divided into the high expression group ( n=48) and low expression group ( n=42), and their survival information was retrospectively analyzed. Cell transfection was performed with the plasmid carrying human HMGB1-shRNA to knockdown HMGB1 expression in ECA109 cells and xenograft mouse models were established. The tumor volume and mass were calculated after irradiation with a dose of 15 Gy. The cell apoptosis in xenograft tissues were detected. Survival analysis was performed using Kaplan-Meier method. Univariate prognostic analysis was conducted by log-rank test. Intergroup comparison was performed by analysis of variance (ANOVA). Results:The expression level of HMGB1 was significantly associated with gross tumor volume, longest diameter of tumor, T staging and distant metastasis ( χ2=9.663, 5.625, 4.068, 7.146, all P<0.05). In the low expression group, the overall survival (OS) ( χ2=4.826, P=0.028), progression-free survival (PFS) ( χ2=4.390, P=0.036) were longer compared with that in the high expression group. Further analysis of HMGB1-high expression patients showed that the radiation dose and the combination of chemoradiotherapy did not significantly affect the OS or PFS of ESCC patients. We observed that knockdown of HMGB1 slowed the growth rate of xenograft, decreased the tumor volume and increased the apoptosis rate after irradiation. Conclusions:ESCC patients with high expression level of HMGB1 obtain poor prognosis after chemoradiotherapy, which can be enhanced by increasing the sensitivity to radiotherapy and chemotherapy. HMGB1 knockdown can effectively increase the radiosensitivity of xenograft in ESCC nude mice.
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Objective:To analyze the local recurrence patterns after concurrent chemoradiotherapy (CCRT) for thoracic esophageal squamous cell carcinoma (ESCC) through image fusion, and to explore the risk factors of local recurrence and its relationships with dosimetric indices.Methods:A retrospective analysis was conducted for 209 thoracic ESCC patients who received radical CCRT in Fourth Hospital of Hebei Medical University during 2016-2019. For the patients diagnosed as the local recurrence of esophageal lesions, their CT images were fused with the original planning CT images using image registration software to identify the recurrence sites. Through 1∶1 propensity score matching (PSM) of the clinal data of patients with local recurrence (the recurrence group, nbefore = 81, nafter = 62) and those without local recurrence (the recurrence-free group, nbefore = 128, nafter=62), the dose and volume parameters of the treatment plans for the two groups were compared. Univariate and multivariate analyses were conducted using the Kaplan-Meier method and the Cox regression model to analyze the factors affecting the overall survival (OS), progression-free survival (PFS), and recurrence-free survival (RFS). Results:All patients had 1-, 3-, and 5-year OS rates of 80.9%, 42.6%, and 33.0%, respectively, 1-, 3-, and 5-year PFS rates of 67.9%, 34.0%, and 27.9%, respectively, and 1-, 3-, and 5-year RFS rates of 71.3%, 39.2%, and 30.5%, respectively. T stage, N stage, and radiation dose were independent prognostic factors for the OS, PFS, and RFS ( HR = 1.42-1.87, P < 0.05) of the patients, respectively. Among 68 patients with local recurrence, 62 cases (91.2%) suffered recurrence within the gross tumor volume (GTV). The dose and volume parameters of patients with local recurrence, such as GTV- D95%, clinical target volume (CTV)- D95%, GTV- D50%, CTV- D50%, and planning target volume (PTV)- D50%, GTV- V60, CTV- V60, and PTV- V60, were significantly lower than those of patients free from the local recurrence ( t=1.90-2.15, P < 0.05). Conclusions:Local recurrence of patients with thoracic ESCC after radical CCRT occurs mainly within the GTV. Increasing radiation doses may contribute to their survival benefits. The D50% for each target volume in the radiotherapy plan may be related to local recurrence, and it is necessary to conduct further research.
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Objective:To examine the effect of FAM83D knockdown on proliferation, survival ability and invasion of human esophageal squamous cell carcinoma after X-ray radiation, and explore the mechanism.Methods:The expression of FAM83D, E-cadherin and vimentin in tumor tissues was detected in 69 cases of esophageal squamous cell cancer by using immunohistochemical method. The siRNA based on the sequences of the FAM83D mRNA were synthesized to transfect into the cultured ECA109 cells as FAM83D shRNA group. The effect of silencing FAM83D gene was evaluated to determine the protein levels of FAM83D in the human oesophageal squamous cell carcinoma ECA109 and KYSE30 cells using western blotting. MTS, clone formation, and Transwell assay were employed to examine the proliferation, survival ability and invasion of ECA109 and KYSE30 cells in vitro, respectively. We used flow cytometry assay to analyze distribution of cell apoptosis in different groups. Western blotting was used to examine the expression of cell metastasis-related molecules and apoptosis-related protein. Results:The strong expression rates of FAM83D, E-cadherin, and vimentin were 55%(38/69), 36%(25/69) and 61%(42/69) in the tumor tissues, respectively. FAM83D protein expression was significantly and negatively correlated with the expression of E-cadherin ( r=-0.350, P<0.01), and positively with the expression of vimentin ( r=0.470, P<0.01). Western blotting results demonstrated that silencing FAM83D gene significantly reduced the FAM83D protein expression ( P<0.01). MTS data demonstrated that FAM83D knockdown after irradiation significantly inhibited the proliferation of esophageal squamous cell carcinoma ECA109 and KYSE30 cells ( P<0.05). The data from the clone formation assay revealed that the radiosensitivity was increased after downragulation of FAM83D expression ( P<0.01). In addition, the invasive abilities of oesophageal carcinoma cells transfected with FAM83D shRNA after irradiation were significantly inhibited compared with those of the NC group ( P<0.01), followed by the downregulation of N-cadherin, vimentin, Snail, p-Akt and p-GSK-3β expression, and the upregulation of E-cadherin expression ( P<0.01). The apoptosis rate of tumor cells in FAM83D shRNA group after irradiation was markedly increased ( P<0.01), followed by a decrease of Bcl-2 and Mcl-1 expression and an increase of Cleaved caspase-3 expression ( P<0.01). Conclusions:FAM83D expressions was found to be closely related to the invasion and development of ESCC. Furthermore, siRNA interference technology inhibited the expression of FAM83D gene in oesophageal squamous cell carcinoma cells, reduced the proliferation, invasion of cells, induced cell apoptosis, and increased radiosensitivity, which may be associated with regulating the epithelial-mesenchymaltransition via Snail/Akt/GSK-3β signaling pathways.
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Autoimmune hepatitis (AIH) is a progressive inflammatory liver disease, and the incidence rate of pediatric AIH is gradually increasing in recent years. AIH can be classified into AIH-1 (with positive antinuclear antibody and/or smooth muscle antibody and/or anti-soluble liver antigen antibody) and AIH-2 (with positive liver-kidney microsomal type 1 antibody and/or anti-liver cytosol type 1 antibody), among which AIH-2 is mainly seen in children. Positive autoantibodies are rare in healthy children, and thus the requirements for autoantibody titer in the diagnosis of pediatric AIH are lower than the criteria for adults. Pediatric AIH progresses more rapidly than adult AIH, and treatment should be started immediately after confirmed diagnosis. Scoring systems for the diagnosis of AIH in adults are not applicable to pediatric patients and cannot be used to differentiate AIH from autoimmune sclerosing cholangitis.
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Objective@#To evaluate the effect of X-ray radiation on cell proliferation, migration, survival ability and cell cycle of human esophageal squamous cell carcinoma after RNA interference-mediated down-regulation of HMGB1 gene expression.@*Methods@#The expression of HMGB1 at mRNA and protein levels in the human esophageal squamous cell carcinoma cell lines ECA109 and KYSE30 was determined using RT-PCR and Western blot assays. MTS and Transwell assays were employed to examine the proliferation and migration of ECA109 and KYSE30 cell lines. The cellular survival ability in vitro was assessed by clone formation assay. The cell cycle after X-ray radiation in different groups was detected by flow cytometry.@*Results@#The expression of HMGB1 at mRNA and protein levels in ECA109 and KYSE30 cells were markedly higher in a dose-dependent and time-dependent manner in the radiation group than that in the control group (all P<0.05). MTS results demonstrated that the proliferation of ECA109 and KYSE30 cells was obviously lower at each time point after radiation than that in the group without radiation (all P<0.01). The expression of HMGB1 at mRNA and protein levels was significantly inhibited in the HMGB1 siRNA group than those in the control and NC groups (both P<0.01). The data from the clone formation assay revealed that the radiosensitivity was significantly increased after down-regulation of HMGB1 expression (P<0.01). Transwell migration assay revealed that the number of migrating cells at the fourth hour after X-ray irradiation in the HMGB1 siRNA group was significantly lower than those in the control and negative groups (both P<0.01). In the HMGB1 siRNA group, the percentage of cells at G0/G1 phase was obviously higher, whereas the percentage of S phase was significantly lower than those in the control and NC groups, and the trend was even more significant after X-ray radiation (all P<0.01).@*Conclusion@#Inhibition of HMGB1 expression by siRNA can suppress the proliferation and migration of ECA109 and KYSE30 cells and enhance the radiosensitivity by increasing the cell cycle arrest at G0/G1 stage after X-ray irradiation in vitro.
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Objective To investigate the prognostic effects and failure patterns of different clinical target volumes of IMRT in definitive chemoradiotherapy for cervical and upper-thoracic esophageal cancer,in order to provide a reference for radiotherapy target area delineation.Methods A retrospective analysis was performed on the clinical data of 132 patients with cervical and upper-thoracic esophageal cancer who received definitive IMRT and concurrent chemotherapy in our hospital from 2010 to 2014.Seventy-one patients received elective nodal irradiation (ENI) and the other 61 patients received involvedfield irradiation (IFI).The Kaplan-Meier method was used to calculate local control (LC),progressionfree survival (PFS) and overall survival (OS) rates.The significant difference was evaluated by the logrank test.The prognostic factors were determined by Cox univariate and multivariate analyses.Results The last follow-up time was December 2017,the median follow-up time was 59.5 (14.2-95.8) months.Follow-up rate was 99.2％.For the ENI and IFI groups,the 1-,3-,5-year LC were 77.5％,58.8％,48.8％ vs.64.3％,29.1％,26.2％ (x2=9.68,P=0.002),PFS were 68.6％,37.7％,25.9％ vs.47.5％,17.2％,3.6％ (x2=11.39,P=0.001),OS were 81.7％,53.9％,31.3％ vs.70.5％,31.9％,16.3％ (x2=7.70,P =0.006),respectively.In multivariate analysis,T stage,N stage,and RT field were independent factors for LC,PFS and OS(P＜0.05).The total failure rates,local-regional recurrent rate in ENI group were lower than those in IFI group (x2 =13.23,5.24,P＜0.05).No significant differences were found in acute radiation esophagitis,pneumonitis and myelosuppression (Grades ≥ 3) between the two groups(P＞0.05).Conclusions Compared with IFI,ENI can significantly reduce local-regional recurrence and distant metastasis and improve the long-term survival for cervical and upper-thoracic esophageal cancer patients who received definitive chemoradiotherapy.
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Objective To evaluate the effect of RNF2 gene knockdown in ECA109 cells on the radiosensitivity to esophageal cancer cell xenograft in nude mice. Methods Thirty-six male BALB/c/nu nude mice were randomly divided into 6 groups: control group, control+ irradiation group, NC group, NC+irradiation group, RNF2 shRNA group and RNF2 shRNA+ irradiation group. The nude mouse models with transplanted tumors were established by subcutaneous inoculation of EAC109 cells and given with irradiation at a dose of 3 Gy for 5 times. The longest ( a) and shortest ( b) diameters of the transplanted tumor were measured every 2 to 3 day since the fourteenth day after inoculation. The time of tumor formation was recorded. The tumor volume was calculated according to the formula ( ab2/2 ) . The growth curve was delineated. Three nude mice were sacrificed in each group at 24 h after the initial irradiation. The expression of RNF2 at the mRNA and protein levels in transplanted tumor tissues was measured by qRT-PCR and immunohistochemistry, respectively. The growth and tumor volume of the other nude mice in each group were observed. The cell apoptosis of transplanted tumor tissues was detected by TUNEL assay. The expression of Bcl-2 and Bax at the mRNA and protein levels in transplantated tumor tissues was quantitatively measured by qRT-PCR and immunohistochemistry, respectively. Results The tumor growth rate was the highest in the control and NC groups. The knockdown of RNF2 reduced the growth rate of xenografts and the tumor growth rate was the slowest in the RNF2 shRNA+ irradiation group ( P<0.05) . TUNEL assay revealed that the cell apoptosis rates in all groups were significantly increased after irradiation ( all P<0.05) . Before and after irradiation, the apoptosis rate in the RNF2 shRNA group was markedly higher than those in the control and NC groups ( both P<0.05) . Prior to irradiation, the expression levels of RNF2 mRNA and protein in the RNF2 shRNA group were significantly lower compared with those in the control and NC groups ( all P<0.05) , and the tendency became more significant after irradiation. Compared with the control and NC groups, the expression levels of Bcl-2 mRNA and protein were significantly down-regulated in the RNF2 shRNA group before and after irradiation ( all P<0.05) , whereas those of Bax mRNA and protein were considerably up-regulated ( all P<0.05 ) . Conclusions In vivo experiment demonstrates that RNF2 knockdown effectively increases the radiosensitivity of esophageal carcinoma EAC109 cells in nude mouse models with transplanted tumors, which is intimately associated with inducing the cell apoptosis.
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Objective To investigate the effect of cordyceps sinensis from different origins on immune response in mice. Methods Cordyceps sinensis from two origins were prepared into powder, and then the mice were divided into high, middle and low dose(0.4,0.2,0.1 g.kg-1)groups, respectively.In addition, purified water was given as the normal control group.Effects of cordyceps from two different origins were observed by detecting spleen lymphocyte proliferation induced by ConA, delayed type hypersensitivity ( DTH) in mice induced by sheep red blood cells ( SRBC ) , the number of antibody-producing cells, carbon clearance and peritoneal macrophages Swallow fluorescent microspheres, as well as the activity of NK cells. Results The ability of spleen lymphocyte proliferation induced by ConA, carbon clearance and peritoneal macrophages Swallow fluorescent microspheres, and the activity of NK cells were significantly enhanced in the middle and high dose group of two different origins cordyceps, compared with normal control group (P<0.05).Additionally, the number of antibody-producing cells was obviously increased in medium dose group of both origins cordyceps and decreased in the high dose group (P<0.05).The middle and high dose Qinghai cordyceps significantly improved DTH in mice, while Tibet cordyceps sinensis had no obvious effect, and there was significant difference (P<0.05) between the high dose group of Qinghai and three dose groups of Tibet Cordyceps sinensis.In addition, levels of serum hemolysin in mice were significantly increased in the middle and high dose group of Qinghai and high dose group of Tibet Cordyceps sinensis (P<0.05), and the differences of corresponding medium and high doses of two origins were significant ( P<0.05) . Conclusion Cordyceps sinensis of both different regions significantly improved the immune response of mice.However, the efficacy between the two origins was roughly equivalent and had no significant difference.
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Objective:To investigate the protective effects of Cordyceps sinensis from Tibet and Qinghai on acute renal injury in-duced by gentamicin sulphate ( GM) . Methods:The rat model of acute renal injury induced by GM was established. The biochemical indicators including blood urea nitrogen ( BUN) and serum creatinine ( Scr) in serum and NAG enzyme and urine total protein in urine were detected. HE staining was used to observe the pathologic changes in kidney. Results:Compared with those in the model group, the levels of BUN and Scr in serum and NAG enzyme and urine total protein in urine were significantly reduced in the Cordyceps sinen-sis groups, and kidney cells necrosis was improved in the Cordyceps sinensis groups at low, medium and high dose (P0.05). Conclusion:Cordyceps sinensis from Qinghai and Tibet both have protective effect on acute kidney injury induced by GM in rats, and the difference between them is not remarkable.
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Objective To compare the clinical effect between CO2-1aser assisted and cold instrument assisted suspension laryngoscopic surgery for vocal fold cyst.Methods From January, 2011 to December, 2014, 72 patients with vocal fold cyst, which diagnosed by strobolaryngoscopy, were randomly divided into CO2-1aser assisted group and cold instrument group.Strobolaryngoscopy, acoustic analysis and perceptual voice analyses were performed on each patient before surgery, 1 month, and 3 months after surgery, respectively.Results All operations were successfully completed.The complete vocal fold cyst resection rate of CO2-1aser assisted group was significantly higher than cold instrument group (29/36, 80.5％ vs 21/36, 58.3％, P ＜ 0.05), especially the left vocal fold cyst (13/16, 81.3％ vs 9/19, 47.4％, P ＜ 0.05).The complete right vocal fold epidermoid cyst resection rate was significantly higher than retention cyst (17/19, 89.4％ vs 11/18, 61.1％, P ＜ 0.05).Two recurrent cases were found in cold instrument group but no recurrent cases in CO2-laser assisted group (0/36, 0％ vs 2/36, 5.6％, P ＞ 0.05).Correlation analysis showed that vocal fold cyst recurrence was related to complete resection rate and has no relation with surgical methods, histopathological types and position.Subjective and objective assessment of voice quality in preoperative, 1-month postoperative and 3-month postoperative were similer between CO2-1aser assisted group and cold instrument group (P ＞ 0.05).Conclusion The CO2-laser assisted suspension laryngoscopic surgery for vocal fold cyst, can increase the surgical precision, reduce the left hand impact, improve the complete resection rate and reduce the recurrence rate.
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<p><b>OBJECTIVE</b>To investigate the expression of Dynamin subtypes in inner hair cell (IHC) of mice, and to discuss their possible roles in age-related hearing loss.</p><p><b>METHODS</b>Auditory brainstem response (ABR) was recorded from the Kunming mice on postnatal 3 weeks (young), 10 weeks (adult), and 16 months (aged), 10 mice in each group. The expression of each Dynamin isoforms in the hair cells of the cochlea was observed by immunofluorescence staining and confocal microscope, and the transcription level of Dynamin subtypes mRNA was detected in qRT-PCR. Data analysis using SPSS 18 software.</p><p><b>RESULTS</b>ABR threshold showed no significant difference between the group of young and adult (t = -5.273, P = 0.076), but the threshold of the aged group increased comparing with young group (t = -8.365, P = 0.000), and adult group (t = -6.191, P = 0.000). All subtypes expressed in the inner hair cell of mice, of which Dynamin-1 and 2 expressed in the whole inner hair cell in the group of young and adult. In the aged group, Dynamin-1 was lost beneath the nucleus, and Dynamin-2 only be found near the nucleus. In addition, Dynamin-3 was scattered in the region of the basal part of the cells beneath the nucleus and near the spiral ganglion. The qRT-PCR revealed that mRNA of Dynamin-1 reduced with age (F = 10.410, P = 0.011), mRNA of Dynamin-2 increased to a peak in the adult group and then reduced with age (F = 24.575, P = 0.000). Meanwhile, mRNA of Dynamin-3 was not be detected.</p><p><b>CONCLUSIONS</b>All subtypes of Dynamin express in IHC. The expression of Dynamin-1 and 2 is up-regulated during maturity, which might alter the endocytosis of IHC; and the disorder of endocytosis might modulate the synaptic transmission of IHC. Whether Dynamin-3 plays a role in inner hair cells remains unclear because of the low expression.</p>
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Animals , Mice , Aging , Metabolism , Cochlea , Metabolism , Dynamins , Metabolism , Evoked Potentials, Auditory, Brain Stem , Hair Cells, Auditory, Inner , MetabolismABSTRACT
<p><b>OBJECTIVE</b>The purpose of this investigation was to study the effects of the Sildenafil citrate on mice hearing.</p><p><b>METHODS</b>Seven-week-old adult male Kunming mice were used. The mice were randomly divided into four groups with 10 mice in each group.Sildenafil groups were orally administered daily with sildenafil [0.1 mg/(kg·d), 1 mg/(kg·d), 10 mg/(kg·d)] and control group was orally administered with normal saline. Then mice were tested for auditory brainstem response (ABR) to observe the changes of ABR's thresholds at before administration and 1, 5, 10, 15, 20 day afterwards. The mice basilar membrane samples were studied by immunofluorescent labeling.High performance liquid chromatography was used for determination the concentration of sildenafil in endolymph of mice cochlea. Statistical analysis was performed using SPSS 13.0.</p><p><b>RESULTS</b>After 30 min following administration, the Sildenafil in endolymph of mice cochlear could be assayed by high performance liquid chromatography, and it was dose-related.Sildenafil increased the hearing thresholds with the time of administration. Hearing thresholds increased significantly in the sildenafil group at 20 d compared to the control group (P < 0.05). After administered high dose of Sildenafil, on the 20th day, the ABR thresholds average threshold was (60.0 ± 10.0) dBnHL, and the control group was (14.5 ± 6.0) dBnHL.Hair cells damages in the base ring of cochlea could be observed in experimental group in a concentration-dependent manner.</p><p><b>CONCLUSION</b>Sildenafil can pass through blood-labyrinth barrier to the inner ear, and doses of sildenafil administration can induce hearing impairment in mice.</p>
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Animals , Male , Mice , Cochlea , Dose-Response Relationship, Drug , Ear, Inner , Evoked Potentials, Auditory, Brain Stem , Hearing Tests , Mice, Inbred Strains , Piperazines , Pharmacology , Purines , Pharmacology , Sildenafil Citrate , Sulfonamides , PharmacologyABSTRACT
Objective To explore the changes in expression levels of nuclear factor(NF)-κB,tumor necrosis factor(TNF)-e in the lungs of juvenile mice with acute lung injury(ALI) induced by lipopolysaccharide(LPS).And observe the repair of lung damage after intervening with exogenous mesenchymal stem cells(MSCs).Methods Thirty male juvenile C57 mice were randomly divided into the control group,the ALI group,and the ALI + MSCs group by the random number table method.Mice from each group were euthanized at 12 h and 48 h.The ALI model of juvenile mice was established by intraperitoneal injection of LPS 10 mg/kg.MSCs from mice bone marrow were isolated,cultured and amplified in vitro,and the MSCs (1 × 106/ml) 0.1 ml were given to mice via caudal vein.MSCs marker were identificated by flow cytometry.Pathomorphological changes of mice lung were observed under light microscope after Hematoxylin-Eosin staining.The protein expression changes of NF-κB,TNF-α were observed using immunohistochemistry.Resu]ts Compared with the control group,the protein expression levels of NF-κB,TNF-α were significantly higher at 12 h and 48 h in the lungs of the ALI group(P ＜ 0.05).While those in ALI + MSCs group were markedly lower at these time points than the ALI group [NF-κB:12 h:(0.181 ± 0.008) OD vs (0.203 ±0.008) OD,48 h:(0.197 ± 0.002) OD vs (0.210 ± 0.005) OD; TNF-α:12 h:(0.185 ± 0.004) OD vs (0.201 ± 0.011) OD,48 h:(0.185 ± 0.002) OD vs (0.215 ± 0.009) OD] (P ＜ 0.05).Histopathological evalution showed that typical pathological inflammation lesions in the lung were observed in ALI group,including alveolar congestion,hemorrhage,edema,infiltration of neutrophils in the airspace or vessel wall,thickness of the alveolar wall;pathological changes were relieved obviously in ALI + MSCs group.Conclusion The expression of NF-κB and TNF-α are increased in lung tissues in the juvenile mice model of ALI induced by LPS.MSCs can alleviate injury degree of ALI induced by LPS in mice,the mechanism of action may correlate with decreasing NF-κB and TNF-α content in lung tissue.
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<p><b>OBJECTIVE</b>To investigate the effects of reducing APE/Ref1 expression in the cultures of rat spiral ganglion cells with oxidative damage induced by H(2)O(2).</p><p><b>METHODS</b>Primary cultured rat spiral ganglion cells were infected with small interfering RNA to APE/Ref1 (Ape1siRNA) for 72 h, followed by treating with H(2)O(2) (0, 10, 25, 50, 100 and 300 µmol/L) for 1 h , and then cultured in normal medium for 24 h. Western blot were used to detect the level of APE/Ref1 protein and phosphorylation of histone protein H2AX in the infected cells. The caspase3 activation was tested by spectrophotometric method . The cell viability was determined by MTT and the apoptosis of spiral ganglion cells was determined by terminal-deoxynucleotidyl transferase mediated nick and labeling (TUNEL).</p><p><b>RESULTS</b>Western blot showed that infection with Ape1siRNA resulted in APE/Ref1 reduced expression in the spiral ganglion cells. Exposing spiral ganglion cultures with reduced expression of APE/Ref1 to H(2)O(2) (50, 100, 300 µmol/L) for 1 h resulted in increasing in the phosphorylation of histone protein H2AX. The reduction in APE/Ref1 significantly reduced cell viability in cultures 24 h after 1 h expression to 50-300 µmol/L H(2)O(2). The apoptosis of cells and caspase 3 activity was detected significantly improved.</p><p><b>CONCLUSIONS</b>The induced of APE/Ref1 results in significantly decrease in spiral ganglion cells viability in oxidative stress. The repairing function of APE/Ref1 is necessary for optimal levels of neuronal rat spiral ganglion cells survival.</p>
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Animals , Rats , Cells, Cultured , DNA-(Apurinic or Apyrimidinic Site) Lyase , Genetics , Gene Silencing , Hydrogen Peroxide , Oxidation-Reduction , Oxidative Stress , RNA, Small Interfering , Rats, Sprague-Dawley , Spiral Ganglion , Cell Biology , MetabolismABSTRACT
OBJECTIVE@#The purpose of this investigation was to observe the effects of the Acetaminophen on auditory in mice.@*METHOD@#Regardless of male and female mice, healthy seven-year-old C57 mice were randomly divided into Acetaminophen low-dose group (150 mg/kg), Acetaminophen medium-dose group (300 mg/kg), Acetaminophen high-dose group(600 mg/kg) and control group. Then mice were tested for ABR to observe the changes of ABR's threshold in the zero, second, fourth and ninth day separately. The change of cochlea hair cells morphology was studied by immunofluorescent labeling. And HPLC detects the concentration of Acetaminophen in endolymph of mice cochlea.@*RESULT@#After 30 minutes following administration, the Acetaminophen in endolymph of mice cochlear can be assayed by high performance liquid chromatography (HPLC). Acetaminophen increased the hearing thresholds compared to the control group. Hearing thresholds increased significantly in the Acetaminophen at 9 d,compared to the control group (P < 0.05). After administered medium-dose and high-dose of Acetaminophen, on the 9th day with the time of giving medicine to all the groups strengthens, the ABR thresholds heightens. And the average threshold is (44.75 +/- 16.00) dB, (50.00 +/- 11.00) dB respectively. Hair cells damages could be observed in experimental group after operations.@*CONCLUSION@#Acetaminophen can pass through blood-labyrinth barrier to the inner ear. These data demonstrate that taking certain acetaminophen can induce hearing impairment in mice.
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Animals , Female , Male , Mice , Acetaminophen , Toxicity , Hair Cells, Auditory , Pathology , Hearing , Mice, Inbred C57BLABSTRACT
OBJECTIVE@#To explore the treatment and possible prognostic factor of nasal sinuses adenoid cystic carcinoma.@*METHOD@#Retrospectively analysed the records of 18 patients with complete clinical and pathological data,which including 4 patients given up treatment, 5 patients taken surgical treatment and 9 patients taken surgical treatment as well as radiotherapy and chemotherapy.@*RESULT@#Fifty percent of the patients got 2-year survival and 3 cases of death due to intracranial tumor invasion and 2 patients died of the disease distant metastasis.@*CONCLUSION@#If patients got Nasal sinuses adenoid cystic carcinoma, they should take comprehensive treatment based on surgery, in order to improve the survival rate. The prognosis depends on the tumor early detection and early treatment, the sooner the treatment, the better.
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Adult , Aged , Female , Humans , Male , Middle Aged , Carcinoma, Adenoid Cystic , Therapeutics , Nasal Cavity , Pathology , Paranasal Sinus Neoplasms , Therapeutics , Prognosis , Retrospective StudiesABSTRACT
The author proposed student-centered learning system in otolaryngology-head and neck surgery for undergraduate clinical training after exploration and intentions.Four mutual impacted frames were built including integration of teaching philosophy,visualization of training methods,diversification of educational targets and interaction of training courses.Endoscopic navigated learning and multimedia aided training were applied,respective teaching purposes were set and various clinical training courses were introduced to students in their learning of otolaryngology,which were believed to help develop more medical talents with higher comprehensive qualities and better clinical skills.
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Drug metabolism studies, including in vivo and in vitro metabolism studies, are significant in the design of candidate compounds and screening of lead compounds at drug discovery/development stages. Compared with in vivo metabolism studies, in vitro metabolism studies have the advantages of rapidity, simplicity, without consumption of large amounts of samples and animals. Moreover, it is convenient for researchers to observe the selective interaction between compound and target. Therefore, in vitro metabolism studies are appropriate for high throughput screening of compounds which are lack of metabolism information and have been widely used during drug discovery stages. This article briefly introduced the application of in vitro drug metabolism studies based on the metabolic stability, reaction phenotyping and metabolic drug-drug interactions, aiming to raise valuable evaluation strategies for innovative drug discovery in China.
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<p><b>OBJECTIVE</b>To study the effects of four trace elements Mn, Fe, Zn and Cu on growth of the 2nd- and the 3rd-years Paeonia lactiflora.</p><p><b>METHOD</b>The experiment was designed as randomized blocks. The data of physiological parameters such as fresh weight of root, numbers of bud and root division, length and diameter of the root and the contents of paeoniflorin in root were measured after fertilized with the four trace elements. Also the contents of the four trace elements in soil and roots, stem and leaves of P. lactiflora were detected by atomic absorption spectrometry.</p><p><b>RESULT AND CONCLUSION</b>The growth of the P. lactiflora was improved and the content of paeoniflorin was increased by proper level of Mn, Fe, Zn and Cu, but depressed by the higher level. Only Zn can be accumulated in the roots of P. lactiflora.</p>
Subject(s)
Benzoates , Metabolism , Bridged-Ring Compounds , Metabolism , Copper , Pharmacology , Glucosides , Metabolism , Iron , Pharmacology , Manganese , Pharmacology , Monoterpenes , Paeonia , Metabolism , Spectrophotometry, Atomic , Zinc , PharmacologyABSTRACT
OBJECTIVE@#To observe the short-term therapeutic effect of focused ultrasound in treating allergic rhinitis under nasal endoscope.@*METHOD@#One hundred and seventeen patients with allergic rhinitis were treated by the CZB ultrasound therapeutic system which was developed and produced by Chongqing Haifu (HIFU) Technology Co. Ltd., Chongqing China. It was used to scan inferior nasal concha and the anterosuperior part of nasal septum under nasal endoscopy. The therapeutic effect was evaluated by clinical symptoms controlled counting-scores, according to the Chinese Lan zhou principle of treatment and recommendation program for allergic rhinitis.@*RESULT@#The excellent effective rate was 44/117 cases (37.6%), effective rate was 49/117 cases (41.9%), ineffective rate was 24/117 cases (20.5%), and the total effective rate was 79.5 after 12 months follow up.@*CONCLUSION@#The focused ultrasound is convenient, safe, repetitive and effective in treating allergic rhinitis under nasal endoscope. The long-term therapeutic effect remains to be further studied.