Objective:In order to explore the maximum and the optimal velocity of front window air in biological safety cabinets and provide a scientific evidence for relevant test. Methods: As classⅡ biological safety cabinet an testing sample, computational fluid dynamics method is adopted to establish numerical model, then made the simulation of front window airflow. Results: The velocity relationship between front window airflow and the internal air has been confirmed. Conclusion:The maximum velocity of the front window flow is 1.4 m/s and the optimal velocity is 1.0 m/s. The tested data and conclusion can give some suggestions and reference for biological safety cabinets detection.

Objective To summzarize the impacts of respiratory syncytial virus (RSV) infection in the early period(< 72 h) on the postoperative course after open-heart surgery in pediatric patients, and to discuss the expe-riences on therapeutic strategies. Method From March 2005 to March 2008, 39 patients diagnosed to be RSV in-fection confmned by RSV antigen test were prospectively enrolled into RSV-infeetion group. Anoth.er 39 patients were randomly 1 : 1 matched with age and same type of congenital heart disease (CHD) during the same period who also underwent open-heart surgery without RSV infection (nonRSV-infection group) as control group. The medical records of these patients were retrospectivdy reviewed. The duration of mechanical ventilation (MV), length of ICU stay and hospital stay were compared between the two groups with Paired Student's t test. Meanwhile Fisher' s exact test was used to compare the differences in noninvasive positive pressure ventilation, incidence rate of re-intubafion and severe postoperative complications between groups. Patients in both groups were further divided into subgroups aceonting to differences in age, cyanosis and pulmonary arterial pressure in order to identify the dif-ferent impacts of RSV infection in patients in different settings. Results All the patients were survived and dis-charged home. RSV infection significantly prolonged the duration of MV, ICU and hospital stay (all P < 0. 05).In addition, it significantly increased the incidence of pulmonary atelectasis (P < 0.05). In patients under 6 months old, RSV infection resulted in prolongation of MV, ICU and hospital stay (all P <0.05); furthermore, it significantly increased the incidence of complications of low cardiac output syndrome and bacteria co-infection (both P = 0.05). In patients over 24 months, RSV infection had no significant impacts in all the parameters which are compared between the two groups. In patients with cyanotic CHD, RSV infection significantly prolonged the duration of MV, ICU stay and hospital stay (all P < 0.05). In patients with cyanotic CHD, RSV infection significantly prolonged the duration of ICU stay and hospital stay (P <0.05). In patients with pulmonary hyper-tension, RSV infection significantly prolonged the duration of MV, ICU and hospital stay(all P <0.05), and in-creased the incidence rate of concomitant infection (P < 0.05). However, in patients without pulmonary hyper-tension, RSV infection only significantly increased the length of hospital stay (P < 0.05). Conclusions RSV in-fection in the early period after open-heart surgery in pediatric patients has significant adverse impacts on the post-operative course, especially in those patients under 6 months old, patients with pumonary hypertension or cyanotic CHD. Early diagnosis, and effective circulatory and respiratory support,alone with antivirus results in a satisfied outcome.

al aberrations in MM.

Objective To construct the lamino acid transporter 1 eukaryotic expression vector of C 57 mouse and to express the gene inNeuro-2atumor cells,and explore the effect of LAT1on proliferation and apoptosis of Neuro-2a cell. Methods The full-length LAT1 cDNA was synthesized by RT-PCR and cloned into pcDNA3.1vector to construct recombinant plasmid.The constructed pcDNA3.1-LAT1vector was verified by Enzyme digestion and sequencing and then transfected intomurine Neuro-2acellsby liposome.The transfected cells were selected with G418 and stably expressed strain was constructed .The expression of LAT1 was detected by RT-PCR and western blot .Proliferation was analyzed by MTT , cell cycle and apoptosis were detected by flow cytometric analysis .Results The full-length LAT1 cDNA was amplified successfully and pcDNA3.1-LAT1eukaryoticvector was constructed successfully .Enzyme digestion and sequencing confirmed the sequence was correct .Neuro-2acells were transfected and Stably expressed strain was constructed successfully.MTT showed that the group of transfected restructuring plasmid could significantly affect Neuro -2a cell proliferation more than the control groups ( P <0.05 ) .From the flowcytometric analysis , LAT1 could promote cell proliferation and inhibit Neuro-2a cell apoptosis.Conclusion LAT1 can express successfully inNeuro-2acells which were transfected with recombinantpcDNA3.1-LAT1plasmid.LAT1 in Neuro-2a cells can promote cell proliferation and inhibit the cell apoptosis which provides a basis for the study of LAT 1.That lays the foundation for studying biological effects of LAT 1.

Chinese hamster is an important laboratory animal in medical and biological researches,but the molecular genetic markers research was rarely reported.In our study the base composition,gene structure,genetic evolution and other characteristics of mitochondrial genome of Chinese hamster were analyzed using the methods of bioinformatics and comparative genomics,genetic quality detection system of Chinese hamster were also established.These results would supply genome data for animal models of human diseases,and lay the foundation for scientific evaluation and reasonable utilization.

[ ABSTRACT] AIM:To observe the changes of perilipin and adipose differentiation-related protein ( ADRP) du-ring the development of diabetes mellitus and to explore the effect of perilipin and ADRP on abnormal glucose metabolism with non-alcoholic fatty liver disease ( NAFLD) .METHODS:The rat model of impaired glucose tolerance ( IGT) was in-duced by feeding high-fat diet, and the type 2 diabetes mellitus (T2DM) model was induced by feeding high-fat diet for 4 weeks and intraperitoneally injecting streptozotocin.The morphological change of the liver tissue was observed under optical microscope.The serum contents of perilipin and ADRP were measured by ELISA.The mRNA expression of perilipin and ADRP in the liver tissues was detected by real-time PCR.The protein expression of ADRP in the liver tissues was deter-mined by Western blotting.RESULTS:HE staining showed steatosis in the liver of the rats in IGT group was more serious than that in T2DM group.The biochemical and the pathological processes of rat models were consistent with the clinical feature of related diseases.The serum content of perilipin had no difference among various groups.The mRNA expression of perilipin in IGT group and T2DM group was significantly higher than that in control group.Compared with IGT group, the mRNA expression of perilipin in T2DM group was significantly increased.The serum content of ADRP in T2DM group was significantly lower than that in control group.The mRNA and protein expression of ADRP in model groups was signifi-cantly lower than that in control group.Compared with IGT group, the mRNA expression of ADRP in T2DM group was sig-nificantly reduced.CONCLUSION: The serum content of ADRP plays a role in the development and progression of T2DM.It is negatively correlated with HOMA-IR.NAFLD occurs during progression of abnormal glucose metabolism in-duced by feeding high-fat diet.The development of abnormal glucose metabolism with NAFLD is probably related to the in-creased expression of perilipin and the reduced expression of ADRP.

Objective To investigate the expression changes of macrophage migration inhibitory factor( MIF) and C-Jun N-terminal kinase ( JNK) in the liver of rat with abnormal glucose metabolism and explore the pathological mecha-nism of abnormal glucose metabolism with non-alcoholic fatty liver disease ( NAFLD) .Methods Sixty SD rats were ran-domly divided into impaired glucose tolerance (IGT) model group (n=20), type 2 diabetes mellitus (T2DM) model group (n=20), IGT control group (n=10) and T2DM control group (n=10).IGT models were produced by feeding high-fat diet, T2DM models were produced by feeding high-fat diet for 4 weeks and intraperitoneally injected streptozotocin. Liver cell apoptosis was detected by TUNEL staining.The expression of MIF mRNA in liver tissue was determined by real-time PCR.The expressions of MIF, caspase-3, JNK proteins and phosphorylated JNK(p-JNK)in the liver tissue were de-termined by Western blotting.Results Apoptotic cells were obviously increased in the IGT and T2DM groups.Expression of MIF mRNA in the IGT and T2DM groups was markedly higher than that in the control group, respectively (P<0.01). The expressions of MIF, caspase-3, JNK proteins and phosphorylated JNK were markedly higher than that of the control group, respectively (P<0.05 or P<0.01).The expressions of MIF, caspase-3, JNK proteins in the T2DM group were significantly decreased compared with those of the IGT group, while the expression of phosphorylated JNK was significantly higher ( P<0.01) .Conclusions Abnormal glucose metabolism accompanied with NAFLD is probably related to the in-crease of MIF, Caspase-3, JNK and phosphorylated JNK expression.

In recent years,the incidence of malignant tumors continually increased with the trend of younger age in onset age,which pose a serious threat to human health.At present,there are a variety of clinical anti-tumor treatments.However,a single treatment usually cannot achieve the best therapeutic effect.As a result,the combination therapy is often used in clinical practice.Combination therapy not only can enhance the therapeutic effect and reduce the toxic side effects of drugs,but also can alleviate the pain of patients.Chemotherapy is a commonly used clinical treatment for tumors.However,it can lead to greater side-effects,and cause irreversible damage to normal cells while killing the tumor cells.Photodynamic therapy uses the specific wavelengths of light to excite and activate the photosensitizer enriched in the tumor local.As a result,the tumor cells are killed directly or indirectly by photodynamic reactions with the participation of internal oxygen.Tumorassociated antigen will appear following the chemotherapy or photodynamic therapy.The immune system will stimulate the body to produce specific anti-tumor immune response after identifying the tumor-associated antigens.The combination treatment of chemotherapy and photodynamic therapy combined with immunotherapy not only can effectively improve the treatment effect of chemotherapy drugs and reduce drug side effects,inhibit tumor metastasis,but also can induce the production long-term anti-tumor immune response,so as to maximize the treatment effect.In this paper,the progress of the researches on chemotherapy,photodynamic therapy and immunotherapy in recent years were summarized.

ObjectiveTo understand the current situation and hot spots of research on the treatment of constipation by traditional Chinese medicine （TCM） in China and foreign countries， and provide references and directions for future research. MethodIn this study， the data analysis software CiteSpace 5.8.R3C was used to conduct bibliometrics analysis of the relevant papers on the treatment of constipation by TCM from January 1， 2000 to December 31， 2021 in China National Knowledge Infrastructure （CNKI） and Web of Science core database. The visual display was carried out. ResultAfter retrieval， 2 133 papers were included in CNKI database and 224 papers were included in Web of Science core database. The statistical analysis showed that the overall annual publication volume in China and foreign countries was on the rise， but the publication volume in China had been declining for the past two consecutive years. The author co-occurrence analysis showed that the authors with the largest number of publications in China and foreign countries were LIU Chunqiang and CHUNGWAH CHENG， respectively. The institution co-occurrence analysis showed that the institutions with the largest number of publications in China and foreign countries were the Anorectal Department of Longhua Hospital Affiliated to Shanghai University of TCM and Beijing University of Chinese Medicine， respectively. The keyword analysis showed that research in this field in China and foreign countries mainly focused on TCM therapy， clinical research， etiology and pathogenesis， etc. ConclusionThe research on the treatment of constipation by TCM is mainly concentrated in China， but there is no closely-related scientific research team. The research in this field in China and foreign countries is still developing. With the continuous deepening of research， all research institutions should pay attention to interdisciplinary intersection， highlight technological innovation， and strive to achieve greater breakthroughs in this field.

Chemotherapy has been a major option in clinic treatment of malignant tumors. However, single chemotherapy faces some drawbacks, such as multidrug resistance, severe side effects, which hinder its clinic application in tumor treatment. Multifunctional nanoparticles loading with chemotherapeutic agent and photosensitizer could be a promising way to efficiently conduct tumor combination therapy. In the current study, a novel pH-sensitive and bubble-generating mesoporous silica-based drug delivery system (denoted as M(a)D@PI-PEG-RGD) was constructed. Ammonium bicarbonate (NH