Objective:To investigate gut barrier dysfunction and bacterial translocation (BT) in patients who underwent digestive tract reconstruction and to study the relationship between BT and acute systemic inflammatory state (SIRS). Method： Sixty patients who underwent selective digestive tract reconstruction were observed. Blood were collected before surgery and 1, 3, 5 days after surgery to detect plasma diamine oxidase(DAO) and bacterial DNA. PCR analysis was performed with β-Galactosidase gene of Eschenchia coli and 16SrRNA gene as target gene. The SIRS of all the patients were observed for 10 days. Result：All the PCR results before operation were negative, while there was positive in 14 patients after digestive tract reconstruction. There were 23 patients with SIRS after surgery, and 12 patients PCR result were positive among 23 patients with SIRS. 85.7% of the patients(12/14) with positive PCR result had SIRS, while 23.9% patients (11/46) with negative PCR result had SIRS (P<0.01).The positive PCR rate in SIRS was 52.2% (12/23), which was remarkably higher than that without SIRS(5.4%, 2/37, P<0.01).The levels of plasma DAO in patients with positive PCR result was significantly higher than those of the patients with negative PCR result (P<0.01). The levels of plasma DAO in patients with SIRS was significantly higher than those of patients without SIRS (P<0.01). Conclusion:The gut barrier dysfunction was closely related to BT, and BT was closely related to postoperative SIRS. PCR analysis can be used in early diagnosis of BT, the positive PCR result might be a useful early warning sign of postoperative SIRS.

Objective: To establish the model of palatine mucoperiosteal expansion and observe a new possible treatment approach to soft tissue defect of cleft palate. Methods: Expanders of 10ml were implanted beneath the palatine mucoperiosteum in 4 dogs and injected 1.0ml 0.9% NaCl at the same time. 20 days after the placement of the expander, the expander was expanded by 1.0-1.5ml every 7 days again. The dogs were killed after the expanders reached their capacity. All the specimens were performed histomorphometric and histological examinations. Results: Histological results showed the increase in the layer of cell and the number of collagen fibra and blood vessel. All the specimens of expanded tissue showed the formation of extra palatine mucoperiosteal tissue. Conclusion: Expansion technique is able to form extra palatine mucoperiosteal tissue,which could be a new restoration approach to soft tissue defect of cleft palate and others.

Objective To investigate the physiological characteristics and the association with low prevalence of metabolic syndrome in Keriyans,a nomadic tribe,in the Taklimakan Desert.Methods An epidemiological survey focusing on diet and standardized physical examinations were made in a randomly selected natural population of 508 Keriyans individuals residing in the Taklimakan desert.In addition,237 of Uyghur subjects from Yutian county were enrolled as controls.Results Between these two populations,statistical significances were observed in body mass index (BMI) [(21.25 ± 3.10 vs 22.66 ± 4.18) kg/m2,P＜0.05],blood pressure (P＜0.01),triglyceride [TG,(0.98 ± 0.77 vs 1.50 ± 1.29) mmol/L,P＜0.01],total cholesterol [TC,(2.23 ± 1.02 vs 3.26 ± 0.85) mmol/L,P＜0.01],low density lipoprotein-cholesterol[LDL-C,(1.41 ± 0.68) mmol/L,P＜0.01],fasting blood glucose [(4.43 ± 1.19 vs 5.56 ± 1.39) mmol/L,P＜0.01],fat and salt intake (P＜0.05).The Keriyans had a low incidence of hypertension(9.94％ vs 29.11％,P＜0.01),raised blood cholesterol and diabetes mellitus(2.2％ vs 11.91％,P＜0.01) compared with the control group.The prevalence of metabolic syndrome was 0.6％ (3/500) in Keriyans and 13.62％ (32/235) in the control group.The prevalence of metabolic syndrome in Keriyans was much lower than that in the control group (P＜0.01).The caloric intake in keriyans group was lower tha than in the control group [(1 502.341 vs 2106.870) kcal,P ＜ 0.01].Conclusions The preliminary results showed that the physiological characteristics with low BMI,blood glucose,and the low levels of TG,TC,LDL-C,as well as they were inured to low salt loading,little smoking and no alcohol drinking,and natural living environment free from pollution,these factors might be associated with the low prevalence of metabolic syndrome in Keriyans.And their low calorie intake might be the most important factor of their low prevalence of metabolic syndrome.

Objective To investigate the solutions to the comfort problem caused by traditional batch produc‐tion that cannot satisfy everyone's request .Methods The both objective and subjective evaluations were put forward to the assessment of ear comfort .The accurate data about the pinna was acquired through reverse engineering and extracting key points of the pinna by image detection method .The headphone model was built by the semi-parame‐ter design .Through the FESA study ,headphones - pinna contact pressure was assessed and relevant parameters were improved .Comfort was analyzed by contact pressure .Results The simulation contact pressure was compared before and after optimizing parameters .The results showed that the contact area of the augment cymba conchae could obtain more uniformity pressure .Conclusion The example verification shows this delivers better comfort than traditional one .The research has some reference value for the design and option comfortable headphones .

ObjectiveTo investigate the effects of Yishen Daluo prescription （YSDL） on Ras homolog（Rho）/Rho-associated coiled-coil containing protein kinase（ROCK）signaling pathway in mice with experimental autoimmune encephalomyelitis （EAE） based on the silencing of β-arrestin1 gene. MethodSixty C57BL/6 female mice were randomly divided into a blank group， a model group， a virus group， a YSDL group， a virus + YSDL group， and a prednisone acetate group （hormone group）. The EAE model was induced in mice except for those in the normal group. Adeno-associated virus（AAV）solution （150 μL， 1×10¹¹ vg·mL^-1） was injected into the tail vein of each mouse in the virus group and the virus + YSDL group on the 4^th day of immunization. Drugs were administered on the 8^th day of modeling. Specifically， normal saline was given to the mice in the normal group，the model group，and the virus group at 10 mL∙kg^-1， prednisone acetate suspension to those in the hormone group at 3.9 g∙kg^-1，and YSDL to those in other groups at 20 g∙kg^-1 for 14 consecutive days. The mice were weighed and scored every day. The neurological function scores of mice in each group were recorded every day after immunization. Hematoxylin-eosin （HE） staining was used to determine the inflammatory response and lesion location in the brain tissues and spinal cord tissues of mice. The protein expression of β-arrestin1，Ras homolog gene family member A（RhoA）， and Rho-associated coiled-coil forming protein kinase Ⅰ（ROCK Ⅰ） in spinal cord and brain tissues of EAE mice was determined by Western blot. ResultCompared with the model group， the virus group and the virus + YSDL group showed decreased neurological function scores （P<0.01），and the YSDL group also showed decreased neurological function scores（P<0.05）. HE results showed that there was obvious inflammatory reaction in the central nervous system （CNS） of the model group， which was alleviated to varying degrees in other groups compared with the model group. Western blot results showed that compared with the blank group， the model group showed increased protein expression levels of β-arrestin1， RhoA， and ROCK Ⅰ in the spinal cord tissues （P<0.01）. Compared with the model group， the virus group， the YSDL group， the virus + YSDL group， and the hormone group showed decreased protein expression levels of β-arrestin1， RhoA， and ROCKⅠ in the spinal cord tissues （P<0.01）. Compared with the blank group， the model group showed increased protein expression levels of β-arrestin1， RhoA， and ROCK Ⅰ in the brain tissues （P<0.01）. Compared with the model group， the virus group， the YSDL group， the virus + YSDL group， and the hormone group showed decreased protein expression level of β-arrestin1 in the brain tissues （P<0.01）， and the virus group and the YSDL group showed decreased protein expression levels of RhoA， and ROCKⅠ in the brain tissues （P<0.05）. Additionally， the virus + YSDL group and the hormone group showed decreased protein expression levels of RhoA and ROCKⅠ in the brain tissues （P<0.01）. ConclusionYSDL can improve the clinical symptoms of EAE mice and improve the inflammatory response of CNS. The mechanism is presumably attributed to the fact that YSDL inhibits the expression of β-arrestin1 in CNS，thereby reducing the expression of Rho/ROCK signaling pathway. Furthermore， YSDL may have a synergistic effect with the inhibition of β-arrestin1 gene expression.

OBJECTIVE To study the effects of Yishen daluo decoction on inflammatory factors and cyclic adenosine monophosphate（cAMP）/protein kinase A （PKA）/cAMP response element binding protein （CREB） signal pathway in experimental autoimmune encephalomyelitis （EAE） model mice by inhibiting the expressions of β-arrestin1， and to explore the mechanism of Yishen daluo decoction in the treatment of EAE. METHODS Sixty mice were randomly divided into normal group， model group， TCM group （Yishen daluo decoction 20 g/kg）， positive control group （prednisone acetate 3.9 mg/kg）， β-arrestin1 siRNA adeno- associated virus （AAV-β） group， AAV-β+TCM group， with 10 mice in each group. Except for normal group， EAE model was made in other groups. AAV-β group and AAV-β+TCM group were injected with AAV-β via tail vein to interfere with the expression of β -arrestin1 protein. Starting from the 8th day of modeling， they were given corresponding drug solution/normal saline intragastrically， once a day， for consecutive 14 days. The neurological function score of mice was detected； the pathological and morphological changes were observed in the brain and spinal cord tissues of mice； the serum levels of inflammatory factors [interleukin-2 （IL-2）， IL-23， interferon-γ （IFN-γ）] in mice were determined； the expressions of β-arrestin1， cAMP， PKA and CREB in brain and spinal cord were detected. RESULTS Compared with normal group， neurological function scores， serum levels of inflammatory factors， and protein expressions of β-arrestin1 in brain and spinal cord were significantly increased （P＜0.05 or P＜ 0.01）； protein expressions of PKA， CREB and cAMP in brain and spinal cord were decreased significantly（P＜0.05 or P＜0.01）. The deep staining of cellular shrinkage and aggregation of inflammatory cells were observed in most neurons of the brain and spinal cord， with varying degrees of demyelinating. Compared with model group， the neurological function scores， pathological changes in brain and spinal cord tissues， and most indicators （except for CREB and cAMP proteins in the brain tissue of AAV-β group） were significantly reversed （P＜0.05 or P＜0.01）.Compared with AAV- β group， the neurological function scores， the levels of IFN-γ in serum and β-arrestin1 in spinal cord were significantly decreased （P＜0.05 or P＜0.01）， PKA and cAMP in brain and spinal cord tissues were significantly increased in AAV- β +TCM group （P＜0.05 or P＜0.01）. CONCLUSIONS Yishen daluo decoction can inhibit the expression of β-arrestin1 in the central nervous system thus activating the cAMP/PKA/CREB signaling pathway， relieving nervous system inflammation， and ultimately alleviates the symptoms of EAE.

OBJECTIVE: To study the correlation between ultrastructure of lymphatic capillary in pericancerous tissue and neck lymph node metastasis in laryngeal carcinoma. METHOD: Transmission electronic microscope was applied to observe and compare ultrastructure of lymphatic capillary in 8 normal laryngeal epithelial tissue and 12 pericancerous tissue of laryngeal cancer. RESULT: Lymphatic capillary of pericancerous tissue was significantly dilated compared with normal laryngeal tissue. A large amount of endothelial cell junction was open and devoid of basement membrane. Some endothelial cells of lymphatic capillary were destroyed or broken completely. CONCLUSION Ultrastructure of lymphatic capillary in pericancerous tissue is an important factor of laryngeal cancer metastasis through lymphatic system. This research offers theoretic basis for laryngeal carcinoma metastasis mechanism and prevention.
Aged ; Carcinoma, Squamous Cell ; pathology ; Case-Control Studies ; Female ; Humans ; Laryngeal Mucosa ; pathology ; Laryngeal Neoplasms ; pathology ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; Lymphatic Vessels ; pathology ; ultrastructure ; Male ; Microscopy, Electron, Transmission ; Middle Aged ; Neck ; Neoplasm Staging

BACKGROUND: Most of studies on the mechanical properties of modified glass ionomer cement mainly focus on the compression and bending experiments, but there are few reports on the stress relaxation and creep experiments of glass ionomer cement after adding strontium hydroxyapatite. OBJECTIVE: To compare the stress relaxation and creep characteristics of traditional glass ionomer cement, composite resin enamel adhesive and modified glass ionomer cement. METHODS: Strontium doped hydroxyapatite was added into glass ionomer cement according to the mass ratio of 15%, and then the modified glass ionomer cement was prepared. Samples of modified glass ionomer cement, composite resin enamel adhesive and traditional glass ionomer cement were maded. Ten samples from each group were taken for stress relaxation test and another 10 samples for creep test. RESULTS AND CONCLUSION: (1) At 7 200 s in the stress relaxation test, the stress in the traditional group was decreased by 1.18 MPa, decreased by 1.39 MPa in the composite group, and decreased by 1.38 MPa in the modified group. The decreased value in the traditional group was significantly less than that in the composite and modified groups (P < 0.05). There was no significant difference between composite and modified groups (P > 0.05). (2) At 7 200 s in the creep test, the stress in the traditional group was increased by 0.24%, increased by 0.33% in the composite group, and increased by 0.32% in the modified group. The increased value in the traditional group was significantly less than that in the composite and modified groups (P < 0.05). There was no significant difference between composite and modified groups (P > 0.05). (3) The viscoelastic properties of glass ionomer cement are improved by compounding 15% strontium-doped hydroxyapatite with glass ionomer cement. The increase of viscoelasticity is beneficial to the adhesion and bulk bond strength of glass ionomer cement.

BACKGROUNDCurrently there is a trend towards reducing radiation dose while maintaining image quality during computer tomography (CT) examination. This results from the concerns about radiation exposure from CT and the potential increase in the incidence of radiation induced carcinogenesis. This study aimed to investigate the lowest radiation dose for maintaining good image quality in adult chest scanning using GE CT equipment.

METHODSSeventy-two adult patients were examined by Gemstone Spectral CT. They were randomly divided into six groups. We set up a different value of noise index (NI) when evaluating each group every other number from 13.0 to 23.0. The original images were acquired with a slice of 5 mm thickness. For each group, several image series were reconstructed using different levels of adaptive statistical iterative reconstruction (ASIR) (30%, 50%, and 70%). We got a total of 18 image sequences of different combinations of NI and ASIR percentage. On one hand, quantitative indicators, such as CT value and standard deviation (SD), were assessed at the region of interest. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. The volume CT dose index (CTDI) and dose length product (DLP) were recorded. On the other hand, two radiologists with ≥ 5 years of experience blindly reviewed the subjective image quality using the standards we had previously set.

RESULTSThe different combinations of noise index and ASIR were assessed. There was no significant difference in CT values among the 18 image sequences. The SD value was reduced with the noise index's reduction or ASIR's increase. There was a trend towards gradually lower SNR and CNR with an NI increase. The CTDI and DLP were diminishing as the NI increased. The scores from subjective image quality evaluation were reduced in all groups as the ASIR increased.

CONCLUSIONSIncreasing NI can reduce radiation dose. With the premise of maintaining the same image quality, using a suitable percentage of ASIR can increase the value of NI. To assure image quality, we concluded that when the NI was set at 17.0 and ASIR was 50%, the image quality could be optimal for not only satisfying the requirements of clinical diagnosis, but also achieving the purpose of low-dose scanning.

Adult ; Aged ; Aged, 80 and over ; Algorithms ; Female ; Humans ; Male ; Middle Aged ; Radiation Dosage ; Radiography, Thoracic ; methods ; Tomography, X-Ray Computed ; methods

Hep G2 Cells ; Hepatitis B virus ; physiology ; Humans ; RNA Interference ; RNA, Small Interfering ; Virus Replication