Objective:To explore the effect of costunolide on sensitivity of chronic myeloid leukemia cell line K562/ADR to doxorubicin and its mechanism.Methods:K562/ADR cells in the logarithmic phase were used, and the cells were treated with different concentrations of costunolide, doxorubicin or costunolide combined with doxorubicin for 72 h. The cell proliferation was detected by CCK-8 method, the cell proliferation rate was calculated, and the half inhibitory concentration (IC 50) of the two drugs was obtained. The cells were treated with 10 μmol/L costunolide, 10 μmol/L doxorubicin or costunolide combined with doxorubicin for 48 h, the apoptotic rate was detected by flow cytometry, and the expression level of p38-MAPK pathway related proteins was detected by Western blot. Results:The cell proliferation rate in the costunolide combined with doxorubicin group was lower than that in the corresponding concentration of the two drugs alone groups, and the differences were statistically significant both ( P < 0.05). The IC 50 of doxorubicin for K562/ADR cells was (13.50±0.86) μmol/L, and costunolide was (7.30±0.55) μmol/L ( t = 7.044, P = 0.002). The results of flow cytometry showed that the apoptosis rate of K562/ADR cells in the 10 μmol/L costunolide combined with 10 μmol/L doxorubicin group was higher than that of the blank control group, costunolide alone group and doxorubicin alone group, and the differences were statistically significant [(19.68±3.21)% vs. (2.96±0.87)%, (9.34±2.89)%, (9.18±2.13)%, all P<0.01]. Compared with the 10 μmol/L costunolide alone group and the 10 μmol/L doxorubicin alone group, the expression of the apoptosis inhibitor protein bcl-2 in the two-drug combination group was down-regulated, and the expressions of bad, p-p38, cleaved-caspase-3 and cleaved-PARP proteins were up-regulated. Conclusion:Costunolide can enhance the inhibitory effect of doxorubicin on the proliferation of K562/ADR cells and promote doxorubicin-induced apoptosis, which may reverse the drug resistance of K562/ADR cells by regulating the p38-MAPK pathway.

Continuous Positive Airway Pressure ; Facial Bones ; abnormalities ; Humans ; Infant ; Larynx ; pathology ; Oxygen Inhalation Therapy ; Pharynx ; pathology ; Polysomnography ; Respiration ; Risk Factors ; Sleep Apnea Syndromes ; diagnosis ; etiology ; therapy ; Sleep Apnea, Obstructive ; diagnosis ; etiology ; therapy

Adolescent ; Adult ; Child ; Ear Auricle ; surgery ; Female ; Humans ; Male ; Postoperative Complications ; surgery ; Reconstructive Surgical Procedures ; Skin Transplantation ; Surgical Flaps ; Young Adult

Objective To investigate the nursing care in ultra-high pressure balloon dilatation for treating in patients with hemodialysis patients.Methods The patients with arteriovenous fistula were treated with ultra-high pressure balloon dilatation.Under fluoroscopy guidance the ultra high pressure balloon was used to dilate the stenosis.Preoperative preparation included psychological and routine care.Results Blood flow in all the 14 patients with hemodialysis was ≥ 250 ml/min,mean (270.00±27.33) ml / min.All patients were successfully completed the treatment,there were no angiorrhexis,bleeding,infection and embolism.Conclusion Careful nursing can promote the rehabilitation of patients,improve the effect of postoperative treatment.

OBJECTIVETo evaluate the effects of prenatal stress on neurological functions after middle cerebral artery occlusion (MCAO) in adult offspring rats.

METHODSPregnant rats were randomly assigned to prenatal stress treatment, which was exposed to restraint three times daily in the last week of pregnancy, and no prenatal stress treatment. Adult male offspring rats were subjected to transient focal cerebral ischemia by MCAO. They were randomly divided into four groups: sham group, prenatal stress + sham group, MCAO group and prenatal stress + MCAO group (n = 10). After 24 hours of reperfusion, the neurological deficits were evaluated. The infarct size, cell apoptosis and expression of Caspase 3, cleaved Caspase 3 and Bcl-2 were detected.

RESULTSCompared with MCAO group, the neurological deficits, infarct size and apoptotic cells in prenatal stress + MCAO group were increased significantly (all P < 0.05). The expressions of Caspase 3 and cleaved Caspase 3 were much greater in prenatal stress + MCAO group than those of MCAO group, while the expression of Bcl-2 was significantly decreased in prenatal stress + MCAO group compared with MCAO group (all P < 0.05).

CONCLUSIONPrenatal stress might exacerbate neuroloeical deficits in the offspring rats after MCAO by increasing cell apoptosis.

Animals ; Apoptosis ; Caspase 3 ; metabolism ; Female ; Infarction, Middle Cerebral Artery ; physiopathology ; Ischemic Attack, Transient ; physiopathology ; Male ; Pregnancy ; Prenatal Exposure Delayed Effects ; physiopathology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; Rats, Sprague-Dawley ; Stress, Physiological

Background Researches showed that the incidence rate of cataract is high in the nickel mining area. Nickel sulphate can apparently inhibit the metabolism and proliferation of human lens epithelium cells. But the study on the injury mechanism of nickel on lens is still seldom. Objective Present study was to investigate the effect of nickel sulphate on the lens of SD rats. Methods Forty-five SPF SD rats aged from 7 to 14 days were grouped randomly into subcutaneous injection group, intraperitoneal injection group and blank group. Nickel sulphate of 2 g/L ( 10 mg/kg) was subcutaneously or intraperitonealy injected for 45 days. The opacity of rat lens was examined under the slit lamp at two-week interval and scored based on the criteria of LOCS II and LOCS III. The rats were sacrificed in 45 days after experiment and the lens were obtained for the pathological examination. Result The mean score of the anterior subcapsule opacity of rat lens was obviously higher in subcutaneous injection group compared with blank control group with a significant difference between them (t= 14. 311, P < 0. 05 ) , but no significant difference in the anterior subcapsule opacity between intraperitoneal injection group and blank control group (t = 4. 355 , P>0. 05 ). The score of posterior subcapsule opacity of lens were evidently higher in both subcutaneous injection group and intraperitoneal injection group than the blank control group (t = 9. 316,P = 0. 004;t = 7. 464, P = 0. 009) ,so was the mean score of the anterior +posterior subcapsule opacities(t = 23. 387,P=0. 000;t= 10. 533,P = 0. 002) and the total score of rat lens opacity ( t = 12. 358 , P = 0. 001; t = 10. 188 , P = 0. 003 ) . No significant differences were found in cortex opacity score and nuclear opacity score among three groups ( P > 0.05 ). Histopathology examination revealed that the degeneration of lens collagen protein was more serious in subcutaneous injection group and intraperitoneal injection group than the blank control group,and the injury degree of lens collagen protein was more dominant in subcutaneous injection group. Conclusion System administration of nickel sulphate induced the injury of anterior and posterior subcapsule of lens in SD rat.

BACKGROUND:Pulmonary infection is the main complication after kidney transplantation, and its onset and morbidity may be related to conventional oral drugs after kidney transplantation.
OBJECTIVE:To analyze the effect of methylprednisolone instead of prednisone on severe pulmonary infection after kidney transplantation.
METHODS:Clinical data of 58 patients with severe pulmonary infection after kidney transplantation were retrospectively analyzed. First, according to the characteristics of post-onset patients and lung CT findings, broad-spectrum antibiotics and anti-fungal treatment were adopted, and subsequently targeted therapy, that is, withdrawal or adjustment of dosage and combination regimen of immunosuppressive agents, was employed depending on etiology, fungi and virus detection results. Among the 58 patients, 28 patients were injected methylprednisolone, and 30 patients took oral prednisone. Hyoxemia correction, support therapy and immune replacement therapy were applied.
RESULTS AND CONCLUSION:Thirty-nine of 58 patients (67.2%) were positive for pathogens, including 7 cases of simple bacterial pneumonia, 4 cases of fungal pneumonia, 3 cases of simple cytomegalovirus infection, and 25 cases of mixed infections (5 cases of multiple bacterial infections, 17 cases of fungal and bacterial co-infections, and 3 cases of fungi, bacteria and cytomegalovirus co-infections). Patients subjected to methylprednisolone treatment spent shorter time to recover their temperature than those undergoing oral prednisone (P<0.05). In addition, creatinine fluctuation range in the methylprednisolone group was less than that in the prednisone group (P<0.05). The results showed that intravenous injection of methylprednisolone may accelerate absorption of inflammatory exudate in the lung and shorten treatment time.

BACKGROUND: Nucleotide-binding oligomerization domain (NOD)-like receptor plays an important role against inflammatory responses caused by pathogens and non-pathogens, as well as in the initial stage of autoimmune response. Meanwhile, NOD2 and NOD-like receptor protein 3 (NLRP3) are the representative proteins of NOD-like receptor family. OBJECTIVE: To detect the expression of NOD2 and NLRP3 in a rabbit model of osteoarthritis. METHODS: Thirty New Zealand rabbits were randomly divided into six groups (n=5 per group), including five experimental groups (2, 4, 6, 8 and 10 weeks) and one control group. The model of osteoarthritis was established by fixing the left knee joints using plaster cast, and were sacrificed at postoperative 2, 4, 6, 8 and 10 weeks. The controls received no intervention, and were killed at 10 weeks postoperatively. The left distal femur articular cartilage was taken for safranin-fast green staining. The pathological changes were evaluated by Mankin's scores, and the expression levels of NOD2 and NLRP3 were detected by immunohistochemistry. RESULTS AND CONCLUSION: The Mankin's scores in the experimental groups were significantly higher than those in the control group (P <0.01). Moreover, the scores in the experimental groups were significantly increased with time (P < 0.01). The expression levels of NOD2 and NLRP3 in the chondrocytes were also increased with time (P < 0.01). These results indicate that the expresison of NOD2 and NLRP3 in the cartilage cells is positively correlated with the pathological changes of osteoarthritis, which may be through promoting apoptosis in cartilage cells, thus accelerating the development of osteoarthritis.

Objective:To investigate the expression of wild type estrogen receptor(wER)and the ex-on-5 deleted ER(variant ER,vER)in human hepatocellular carcinoma(HCC)samples,and thereafteranalyze the possibility of HCC treatment by endocrine therapy.Methods:The mRNA expressions of wERand vER were analysed from 28 cases of HCC by RT-PCR.The expression of ER at the protein level wasdetected by immunohistochemistry(IHC).Results:IHC results showed that 39.3% of the HCC speci-mens expressed ER.The mRNA of wER was detected in 89.3%(25/28)of the HCC specimens whilethat of vER was detected in 96.4%(27/28).Twenty four out of 28 HCC cases(85.7%)expressedboth wER and vER.One out of 28 patients(3.5%)expressed only wER whereas 3 patients out of 28(10.7%)expressed vER only.Conclusion:Ninety six percent(27/28)of the HCC patients expressedvER,which suggests that the expression of vER is an important event in the development of HCC.

Objective To investigate the correlation between CT perfusion parameters of pulmonary carcinoma and standardized uptake values(SUV)derived from ~(18)F-fluoro-deoxyglucose positron emission tomography(~8F-FDG PET)and tumor microvessel density(MVD),and to determine the validity of CT perfusion in assessing tumor angiagenic activity of pulmonary carcinoma.Methods Fifty patients(mean age 57.5,17 females)with pulmonary carcinoma underwent CT perfusion using 16-slice helical CT.Blood flow(BF,ml?100g~(-1)?min~(-1)),blood volume(BV,ml?100g~(-1)),mean transmit time(MTF,s)and permeability surface area product(PS,ml?100g~(-1)?min~(-1))were analyzed.SUV of PET was calculated in 14 patients.The CD34 immunohistochemical staining was used for tumor microvessel counting.CT perfusion parameters of pulmonary carcinoma were correlatively studied with SUV and tumor MVD.Pearson's correlation analysis was performed to evaluate the association between CT perfusion parameters and SUV and MVD.Results The average values of BF,BV,MTT and PS were 97.30 ml?100g~(-1)?min~(-1), 8.86 ml?100g~(-1),6.75 s and 34.52 ml?100g~(-1)?min~(-1),respectively.The average value of MVD was 61.82/FOV.The mean value of SUV was 5.96.There was positive correlation between BF and SUV(r= 0.727,P