Objective:To evaluate the inhibitory effect of Small interferirng RNA(siRNA) on human papilloma vinus(HPV)16 E6 oncogenes in nasopharyngeal carcinoma(NPC) cell line HNE-1,and observe the effects of HPV16 E6 silencing on NPC cell growth.Methods:Four siRNA against the HPV16 E6 gene were designed and transfected into HNE-1 cell respectively using RNAi-Mate transfection reagent.MTT was used to investigate the cellular proliferation after the transfection.RT-PCR was used to detect the expression of HPV16 E6 and protein level of HPV16 E6 was measured by Immunohistochemical staining.Results:After the most effective siRNA was transfected into HNE-1cell,the result of MTT indicated that the cellular proliferation was restrained remarkably,and the highest inhibitory rate was 32%.Meanwhile,RT-PCR and immunohistochemical staining showed that there was a significant decrease in HPV16 E6 mRNA and protein level.Conclusion:These results demonstrated that siRNA against HPV16 E6 could effectively downregulate HPV16 E6 expression in HNE-1 cell line,and inhibit the cellular proliferation.RNAi has great potential in the treatment of nasopharyngeal carcinoma as a new gene therapy.

Bone marrow mesenchymal stem cells (BMSCs) are multipotent nonhematopoietic progenitor cells capable of differentiating into multiple lineages, such as bone, fat, and cartilage. BMSCs preferentially home to the damaged tissue and are beneficial to tissue repair. In vitro studies have shown that they do not induce immune response and can inhibit immune cells involved in alloantigen recognition and elimination. In animal models, BMSCs have been shown to induce peripheral tolerance and migrate to injured tissues, where they can inhibit the release of pro-inflammatory cytokines and promote the survival of damaged cells. The unique properties of MSCs suggest a role in cell therapy and treatment of immunomediated diseases.

Objective To elucidate the MRI appearance of prostatic abscess,the DWI and enhanced MRI features.Methods 12 cases of prostatic abscesses were retrospectively analyzed,the clinical symptom mainly manifested as lower urinary tract symptoms and fever.All of the patients were given routine MR examination including DWI sequence,6 patients received further enhanced MR examination.Results In the 12 cases,there were 4 cases behaved as single type,8 cases as multifocal type.The abscess showed iso-or slightly hypo-signal intensity on T1 WI,hyper-signal intensity on T2 WI,markedly high signal intensity on DWI and correspond-ing markedly low signal intensity on ADC.Complete abscess walls showed iso-or slightly hyper signal on T1 WI,hypo-signal inten-sity on T2 WI.The mature abscess walls were thin and smooth,which showed homogeneously ring enhanced in 4 cases.The imma-ture abscess walls showed uneven thickness and moderately enhanced in 2 cases.Septum in the abscess could be found in 4 cases, which showed similar enhancement to the abscess walls,while the abscess cavity showed non-enhanced.Abscesses involved the sur-rounding structures in 2 cases,the involved area showed obvious hyper-signal on T2 WI fat-suppression sequence.Conclusion DWI is the best sequence in the diagnosis of prostatic abscess,the markedly high signal intensity on DWI is the characteristic sign.The enhanced MRI showed the walls and septa clearly,the extent and involvement of adjacent structures.The multi-parametric MRI is a prominent procedure in the diagnosis of prostatic abcess.

Sepsis-induced cardiomyopathy(SICM)is a reversible cardiac insufficiency in the early stage of sepsis, and mainly manifests as left ventricular dilation, decreased ejection fraction, and recovery within 7~10 days.Although it is reversible, the incidence and mortality in sepsis are high.The specific mechanism is still unclear.Inflammatory reaction, mitochondrial dysfunction, apoptosis and other pathophysiological processes play an important role.Its process is complex and involves the interaction between organism and pathogen.The management of SICM is still based on the etiologic treatment of septic shock guided by hemodynamic monitoring and tissue perfusion, with cardio-protective therapy and specific measures.This review summarizes the literatures on the mechanisms and treatments of SICM.

Competing endogenous RNA (ceRNA) is a class of RNA which includes mRNA,pseudogenes,long non-coding RNA (lncRNA),circular RNA (circRNA).ceRNA weakens its inhibitory effect on mRNA translation through competitive binding with shared microRNA (miRNA).Many studies have confirmed that the disorder of ceRNA is closely related to the occur-ence of breast cancer,gastric cancer,lymphoma and other tumors.With the improvement of researches,ceRNA may be used as a tumor marker of clinical diagnosis and therapeutic target.

Bone marrow microenvironment is a complex network consisting of hematopoietic stem/pro-genitor cells (HSPCs),non-hematopoietic cells,extracellular matrix and various cytokines.Its components interact to support normal hematopoiesis.Emerging evidence indicates that the dysfunction of mesenchymal stem cells,myeloid-derived suppressor cells,cytokines and the epigenetic alterations of HSPCs in the bone marrow microenvironment could influence normal hematopoiesis.Abnormal hematopoiesis contributes to the occurrence of hematological malignancies,such as myelodysplastic syndromes (MDS).Animal models have confirmed that bone marrow microenvironment plays an important role in the original generation and maintenance of malignant diseases of hematopoietic system.

Aim To investigate the effect of α1-anti-trypsin Z variant (ATZ)overexpression on cell autoph-agy.Methods HEK 293T cells were transfected with pcDNA3.1 zeo+/ATM or pcDNA3.1 zeo+/ATZ,e-qual amount of empty vector was used as control.Cells were treated with NH4Cl for 4 hours and processed for detecting ATZ,LC3 and p62 by immunoblot.Mean-while ,expression and intracellular localization of ATZ, LC3 in 293 T cells were observed with double labeled immunofluorescence.The mRNA levels of autophagy-related genes were measured by real-time PCR.Immu-nohistochemistry was used to observe the morphology of ATZ-positive cells.Results Compared with the control,higher LC3Ⅱ levels and LC3 puncta were observed in ATZ transfected cells.Meanwhile,the levelsof p62 were decreased in ATZ transfected cells,andreversed by NH4 Cl (25 mmol·L -1 )treatment.Overexpression of ATZ increased the mRNA levels of Atg5and Atg12,but had no obvious influence on Beclin1.ATZoverexpressing cells presented abnormal morphologies.The nuclei became reduced,condensed,and even disappeared in ATZpositive cells.Conclusion ATZ overexpression increases autophagy activity whichmay be related to increasing Atg5 and Atg12 levels.

Objective To study the influence of crosstalk phenomenon on the measurement of gross radioactivity in drinking water.Methods The gross activity in different standard materials with different thickness and area was measured using national standard method.Results There was no obvious change in crosstalk factor with the increase of 241Am powder amount in the measurement,whereas the larger amount of uranium used might lead to larger crosstalk factor.The different measurement channels resulted in different crosstalk factors.The influence of beta radioactivity on alpha radioactivity measurement was significant.On the contrary,the alpha-to-beta crosstalk factor was negligible.The area of sample plate imposed no significant influence on crosstalk factor.Conclusions The gross beta activity can be corrected to decrease the influence of alpha radioactivity using powder standard samples,when simultaneous alpha and beta counting mode is applied in measurement grass radioactivity in drinking water.

Objective To determine the gross radioactivity in drinking water in Chifeng city and to estimate the annual effective dose associated with intake of radionuclides from drinking water.Methods Water samples were collected at locations distributed in 12 counties across Chifeng city, and radioactivity was measured with a low background α/β measuring instrument and HPGe γspectrometer.Results Gross α radioactivity in drinking water was in the range of 0.016-1.230 Bq/L and gross β radioactivity in the range of 0.039-0.878 Bq/L in Chifeng city.The average annual effective dose to the local population from gross α radioactivity was 0.071 mSv/a.Conclusions The grossα/β level in Chifeng city is lower than the World Health Organization-recommended value and the average annual effective dose due to drinking water is within the recommended safety level.

ObjectiveTo investigate the clinical efficacy of warm needling moxibustion plus tricolor medicinal paste in treating knee osteoarthritis.MethodNinety-one patients meeting the diagnostic criteria were randomly allocated to a treatment group (45 cases) and a control group (46 cases). The treatment group was given warmneedling moxibustion plus tricolor medicinal paste and the control group, warm needling moxibustion alone. The clinical therapeutic effect and the WOMAC score were observed in thetwo groups. An improvement in the symptoms of knee osteoarthritis was assessed in the patients after treatment.ResultIn both groups, there were statistically significant pre-/post-treatment differences in the pain and daily activity scores and the WOMAC total score (P<0.05) but not in the morning stiffness score (P>0.05). There were statistically significant differences in the daily activity score and the WOMAC total score (P<0.05) but not in the pain and morning stiffness scores (P>0.05) between the two groups.Conclusion The study shows that warm needling moxibustion plus external application of tricolor medicinal paste has a marked improving effect on the pain, swelling and physiological functions in patients with knee osteoarthritis. Improving lower limb function further in daily activities can produce a satisfactory and stable therapeutic effect.