Objective To investigate the expressions of OCT4 and P27kip1 and their correlations in renal hyaline cell carcinoma. Methods A total of 24 samples of renal hyaline cell carcinoma were detected by immunohistochemistry. The rate of cells with positive labelling of OCT4 and P27kip1 and their intra cellular distribution were observed in renal hyaline cell carcinoma. The expression levels of OCT4 and P27kip1 were compared between different gender, age (<60y and≥60y) and cancer cell metastasis groups. Results The rates of cells with positive OCT4 and P27kip1 expressions were 66.7%and 75% in renal hyaline cell carcinoma respectively. The ratio of cells with high, middle and low expression of OCT 4 were 33.3%, 20.5%and 12.5%in renal hyaline cell carcinoma tissues. OCT4 was mainly expressed in cytoplasm and nuclei with a few was expressed in the cell membrane. The ratio of cells with high, middle and low expression of P27kip1 were 12.5%, 25%and 37.5%in renal hyaline cell carcinoma tissues respectively. The positive staining of P27kip1 was in the cytoplasm and cell membrane, and a small number of nuclei were expressed. There were no significant differences in OCT4 and P27kip1 between different age and gender groups. There were significant differences in OCT4 and P27kip1 expressions between patients with metastasis and patients without metastasis (P < 0.05). A negative correlation was found between OCT4 and P27kip1 expres?sions in renal hyaline cell carcinoma (rs=-0.408, P<0.05). Conclusion The expression of OCT4 is negatively correlated with the expression of P27kip1. Inhibiting expressions of OCT4 or P27kip1, especially knocking down P27kip1 in cytoplasm can be used as a new diagnosis and treatment of renal cancer gene therapy.

Objective To find out whether NOTCH receptors can serve as direct downstream targets of transforming growth factor β(TGF-β)/Smad4 signaling in endothelial cells.Methods Real-time PCR and Western blotting were performed to verify whether the expression of notch1 and notch4 was regulated by TGF-β pathway.Luciferase reporter assay was employed to investigate how the promoter of notch1 and notch4 was regulated by TGF-β.Then, ChIP assay was used confirm whether the promoter of notch1 and notch4 physically interacted with SMAD protein.Results TGF-β1 and bone morphogenetic protein 4 (BMP4) treatment increased the expression of both notch1 and notch4 at the transcriptional level.In addition, SMAD4 was physically associated with the SMAD binding sites on the notch4 promoter, which was largely enhanced under the treatment of TGF-β1 and BMP4.Importantly, TGF-β1 and BMP4 failed to transactivate notch4 in the absence of endogenous SMAD4 or the SMAD binding regions on the notch4 promoter.Conclusion The expression of NOTCH receptor can be directly up-regulated by SMAD4-mediated TGF-β/BMP signaling in cerebrovascular endothelial cells.

Objective To study the correlation between the main parameters and the effect of repression in MR fluid attenuated inversion recovery(FLAIR).Methods 0.5 unit was used in this experiment.The protein aqua of different material appearance and concentration was prepared.FLAIR was performed using the tube imitative experimented method and with different paramters.The best scan parameters were selected by comparison each other and their relativity was analysed.Results The best technical parameters:TR=4000~5000 ms,TE=90~100 ms,TI=1800~2000 ms.Conclusion TI is the key parameter in determining the repression effect,TR and TE only determine the scans time and layer number.FLAIR's repress result is stable,and it can estimate the protein content in the protein aqua.

Objective To study CT and MRI findings of the spongiform myelinopathy in poisoning by heroin.Methods CT and MRI findings in 6 patients with spongiform myelinopathy in poisoning by heroin were retrospectively analyzed with review of literature.Results The lesions were located in white matter,they were multiform and symmetrically distributed.On plain CT scans,the lesions were low density.On MRI,the lesions were low signal on T1WI and high signal on T2WI.The border of lesions was clear or not and no enhancement appeared.MRI is precedent of CT in the diagnosis of this disease,totally 55 focal lesions in the brain ,4 in midbrain and 8 in cerebellum were displayed by MRI.Conclusion CT and MRI findings of the spongiform myelinopathy in poisoning by heroin are more characteristic,according to the drug taking history and central nervous system symptom of patients,differentiating this disease from the other demyelinating disease is not difficult.

Objective To study the application of pulmonary angiography and reconstruction techniques with 16-detector row spiral CT in the diagnosis of pulmonary embolism (PE) in the elderly.Methods Twenty-four elderly patients with suspected pulmonary thromboembolism received detection of CT and pulmonary artery angiography ( CTPA ) on 16-detector MSCT.Post-reconstruction techniques included maximum intensity projection (MIP), volume rendering (VR)and multiple planar reformation (MPR). Results A total of 161 pulmonary artery thrombi were detected in 24 elderly patients. The direct signs of pulmonary embolism included total occlusion (16.8%, 27/161), partial filling defect (67.7%, 109/161) and central filling defect or track sign (15.5%, 25/161). A total of 161 pieces of pulmonary thrombi were detected in transect image, 153 (95.0%) in MPR, 113 (70.2%) in MIP and 69 (42.9%) in VR. The transect image excelled evidently MIP and VR image in displaying pulmonary thrombi, especially the thrombi in pulmonary lobe and pulmonary artery branch (χ2 =235.36 and 243.41, P＜0.05). Conclusions The 16-detector row spiral CT pulmonary angiography is non-invasive, fast and high sensitive, it should be the first choice for the diagnosis of PE in the elderly.

ObjectiveTo evaluate the effect of N-acetylcysteine (NAC) on alleviating hepatorenal damage caused by combined chemotherapy using cisplatin-based regiments in elderly patients. MethodsAll 40 elderly patients with malignant tumors were randomly divided into AB and BA group in cross-over pattern. In AB group, combination of chemotherapy and NAC was administrated for 10 days first, and then combination of chemotherapy, carnine and vitamin C was given for 10 days. In BA group, combination of chemotherapy, earnine and vitamin C was administrated for 10 days first, and then combination of chemotherapy and NAC was given for 10 days, a cycle was 21 days. The hepatorenal damage degree was observed and the curative effect of NAC on hepatorenal damage was evaluated. ResultsThere were no differences in the levels of alanine aminotransferase(ALT), aspartate aminotransferase(AST) and serum creatinine(Cr) between pre chemotherapy and post chemotherapy in A cycle[(25.32±5.23) U/L vs. (29.18±5.43) U/L,(29.21±6.51)U/L vs. (32.37±7. 13)U/L, (89.87±19.56)Mmol/L vs. (95.22±20. 60)μmol/L,all P>0. 05] . In B cycle, the levels of ALT,AST and Cr were (56.76±5.53) U/L, (48.83±6.64)U/L and (137.33±21.16)μmol/L post chemotherapy, respectively, which were evidently higher than pre chemotherapy[(26.19 ± 5.51) U/L, (29.95±6.56) U/L and (88.66±18.27)μmol/L,respectively] (all P<0.01) . ConclusionsNAC has better preventive and therapeutic effects on hepatorenal damage caused by the chemotherapeutic drugs in elderly patients with malignant cancer.

To explore the inhibitory effect of hydroxyapatite (HA) particles with different sizes on malignant melanoma A375 cells in vitro, we synthesized 4 short rod-like HA particles using TIPS. Their mean diameters were 998.0 nm (HA1), 511.0 nm (HA2), 244.0 nm (HA3), and 71.6 nm (HA4), respectively. Malignant melanoma A375 cells were co-cultured with HA particles in vitro. Results showed that HA particles smaller than 511.0 nm in mean diameter could always inhibit proliferation of A375 cells, and nanometer-HA particles (HA4) had the strongest inhibitory effect on A375 cell proliferation and the strongest inducing effect on apoptosis. HA particles were distributed in plasma of A375 cells. The ultrastructure changes of A375 cells were found most significant in nanometer-HA particles (HA4) group. We conclude that particle size is a very important influencing factor on anti-tumor effects of HA and that nanometer-HA particle has the strongest inhibitory effect on tumor cell proliferation.
Apoptosis ; Cell Line, Tumor ; Cell Proliferation ; Durapatite ; chemistry ; Humans ; Melanoma ; Nanotubes ; chemistry ; Particle Size

Objective To investigate the multi -slice CT angiography(MSCTA)findings and explore the clinical value of cavernous transformation of the portal vein(CTPV).Methods CT and clinical materials of 29 cases CTPV were retrospectively analyzed.Results Portal vein obstruction and surrounding fine dialated portoportal collat-erals were found in all 29 cases,Gastroesophageal varices and abnormal hepatic perfusion signs were detected in 25 patients and 8 cases respectively.Pericholedochal venous plexus and cystic vein were dilated and varicose in 9 cases. Conclusion Multi -slice CT has an important clinical role in CTPV diagnosis and treatment,and it can be used to evaluate the the portal vein obstructed status,the collateral vessels,and the accompanied complications of CTPV.

Objective To establish a liquichip method for detecting 6 sub-genotypes of hepatitis C virus(HCV),including 1a, 1b,2a,3a,3b and 6a.Methods The coupling method of PCR amplification and nucleic acid probe was established.The PCR product and the microspheres mixture of the coupled nucleic acid probe were hybridized for establishing the liquichip detection method.The sensitivity and specificity of the established liquichip detection method were evaluated.Nucleic acid in 93 serum samples was detec-ted by this method..Results The established HCV nuclei acid liquichip genotype detection method had the higher specificity and sensitivity,which could detect and classfy 6 HCV sub-genotypes.The sensitivity for HCV 1a,3a and 6a sub-genotypes was 1× 105 copies/PCR;the sensitivity for HCV 1b,2a and 3b sub-genotypes was 1×104 copies/PCR.The detection results in 93 serum samples showed that the this genotyping method had the characteristics of high throughput,rapidness,sentsitivity and specificity. Conclusion This method can be used for the simultaneous and quick detection of 6 HCV sub-genotypes and provides a new meth-od for the genotyping detection of HCV.

Objective To investigate the etiological and antibiotic resistance profile in the old patients with bloodstream infection (BSI).Methods Microbiological and clinical data were collected and reviewed retrospectively for the patients with confirmed bloodstream infection and at least 65 years of age who were treated as inpatients in Tongling People′s Hospital from January to December 2015.Results A total of 107 strains of pathogen were isolated from the blood samples of 107 patients with bloodstream infections, of which community-acquired BSI accounted for 57.9 % (62/107), and hospital-acquired BSI 42.1 % (45/107). Gram negative bacilli accounted for 67.7 % in the pathogens of community-acquired BSI and gram positive cocci accounted for 55.5 % in the pathogens of hospital-acquired BSI. More male BSI patients were secondary to respiratory tract infection than female patients (P<0.001), while more female BSI patients were secondary to urinary tract infection than male patients (P<0.001). Of the 107 isolates, gram negative bacilli, gram positive cocci and fungi accounted for 55.1 % (59/107), 42.1 % (45/107) and 2.8 % (3/107), respectively. The top six pathogens were E. coli (30.9 %), coagulase negativeStaphylococcus (CNS) (20.6 %), S. aureus (10.3 %),K. pneumoniae (6.5 %),Enterococcusspp. (6.5 %) and Acinetobacter spp. (4.7 %). About 51.5 % of the E. coli isolates and 28.6 % of the K. pneumoniae isolates produced extended-spectrum β-lactamases (ESBLs).E. coli isolates showed low resistance rate (< 10 %) to amikacin,cefoxitin and piperacillin-tazobactam. No E. coli isolate was found resistant to carbapenem. About 14.3 % to 28.6 % of K. pneumoniae isolates were resistant to carbapenems. No tigecycline-resistant K. pneumoniae was found. The prevalence of MRSA and MRCNS was 36.4 % and 72.7 %, respectively. No staphylococcal isolates were found resistant to vancomycin, teicoplanin or linezolid. One strain of E. faecium was identified as resistant to vancomycin (VRE).Conclusions This surveillance data indicate that gram negative bacilli play an important role in the BSI of old patients. E. coli and CNS are the most common pathogens. We should pay more attention to the effect of gender and site of infection on the BSI in old patients.