[Research and development of intraoral scanning in edentulous soft tissue].

During the complete denture restoration process, accurate impression making is a crucial step for achieving good denture retention. With the increasing popularity of intraoral scanning technology in fixed restoration, the use of intraoral scanning technology in complete denture restoration for edentulous Jaw has also been developed. This article systematically reviews the research progress and application of intraoral scanning of edentulous soft tissue, focusing on difficulties in intraoral scanning of edentulous jaws, scanning accuracy, clinical application effects, as well as precautions involved. The aim is to provide references for clinical application.

Quercetin improves immune function in Arbor Acre broilers through activation of NF-κB signaling pathway.

Quercetin, the main component of flavonoids, has a wide range of biological actions. Quercetin can be made into a variety of additives for practice, because of the stable chemical structure and water-soluble derivatives. This study was intended to explore the effects of quercetin on immune function and its regulatory mechanism in Arbor Acre broiler to provide a practical basis for improving poultry immune function and figure out the optimum supplementation as functional feed additives. A total of 240 one-day-old healthy Arbor Acre broilers, similar in body weight, were randomly allotted to 4 treatments with 6 replicates, 10 broilers in each replicate and fed with diets containing quercetin at 0, 0.02, 0.04, and 0.06% for 6 wk. Blood and immune organs (spleen, thymus, and bursa) were collected from chickens at the end of the experiment. Growth performance, immune organs indexes, contents of serum immune molecules, splenic T lymphocyte proliferative responses, and expression of immune related genes were evaluated. The results showed that dietary quercetin had no significant effect (P > 0.05) on growth performance of broilers. Compared with control, 0.06% quercetin supplementation in diet significantly increased spleen index and thymus index (P < 0.05). It also increased the secretion of immune molecules including immunoglobulin A (IgA), interleukin-4 (IL-4) (P < 0.001), immunoglobulin M (IgM) (P = 0.007), complement component 4 (C4) (P = 0.001), and tumor necrosis factor-α (TNF-α) (P < 0.05). On the other hand, 0.02% quercetin supplementation significantly increased complement component 3 (C3) (P < 0.05). Additionally, both 0.04 and 0.06% quercetin supplementation significantly increased expression of TNF-α, TNF receptor associated factor-2 (TRAF-2), TNF receptor superfamily member 1B (TNFRSF1B), nuclear factor kappa-B p65 subunit (NF-κBp65), and interferon-γ (IFN-γ) mRNA (P < 0.05), and expression of NF-κB inhibitor-alpha (IκB-α) mRNA were significantly decreased (P < 0.05). Thus, quercetin improved immune function via NF-κB signaling pathway triggered by TNF-α.

Wnt pathway regulates IL-34 level in lupus nephritis.

OBJECTIVE: The aim of this study was to investigate the role of the Wnt pathway in regulating the IL-34 level of lupus nephritis (LN) patients, and to explore the underlying mechanism. MATERIALS AND METHODS: Human mesangial cells (HMCs) of LN patients were selected. The expression level of IL-34 was detected by quantitative Real Time-Polymerase Chain Reaction (qRT-PCR) and Western blot, respectively. Subsequently, HMCs were treated with the Wnt pathway antagonist, DDK1. Meanwhile, the IL-34 level in DDK1 transfected HMCs was then detected. In addition, the viability of HMCs treated with DDK1 was detected by cell counting kit-8 (CCK-8) and colony formation assay, respectively. RESULTS: Both the mRNA and protein levels of IL-34 were significantly upregulated in HMCs of LN patients. Higher expression of ß-catenin was observed in HMCs of LN patients than those of controls, which was reduced after DDK1 treatment. Meanwhile, IL-34 level in HMCs of LN patients was significantly downregulated after DDK1 treatment. In addition, DDK1 treatment remarkably increased the proliferative ability and colony formation ability of HMCs in LN patients. CONCLUSIONS: IL-34 is highly expressed in HMCs of LN patients and is negatively regulated by the Wnt pathway. Furthermore, HMCs viability is remarkably enhanced after blocking the Wnt pathway.

Correlation analysis of TLR9 and IL-23 expression in patients with lupus nephritis.

OBJECTIVE: The aim of this study was to investigate the expression levels of toll-like receptor 9 (TLR9) and interleukin-23 (IL-23) in renal tissue and serum of patients with lupus nephritis (LN), and to explore their clinical correlation. PATIENTS AND METHODS: LN patients and healthy controls were enrolled in the experimental group and the control group, respectively. Blood samples, serum, and peripheral blood mononuclear cells (PBMCs) were collected. Renal lesion tissues and adjacent normal tissues of LN patients were harvested from a renal tissue biopsy. Serum level of IL-23 was detected by enzyme-linked immunosorbent assay (ELISA). Expression of IL-23 in PBMCs was determined by quantitative Real Time-Polymerase Chain Reaction (qRT-PCR) and Western blot, respectively. Meanwhile, TLR9 expression in renal tissues was accessed by immunohistochemistry staining. Subsequently, 24-h protein urine, renal tubular pathological activity index, erythrocyte sedimentation rate (ESR), serum complement C3 level, and blood albumin level of LN patients were recorded. Also, the correlation between TLR9 expression and these pathological indexes was measured by correlation analysis. RESULTS: Serum level of IL-23 in LN patients was significantly higher than that of healthy controls. Similarly, the mRNA and protein expressions of IL-23 in PBMCs of LN patients were markedly higher than those of healthy controls. IL-23 expression was positively correlated with renal tubular pathological activity index of LN patients. Meanwhile, TLR9 was highly expressed in renal tissues of LN patients. Furthermore, TLR9 expression was positively correlated with 24-h protein urine, renal tubular pathological activity index and ESR, whereas negatively correlated with serum complement C3 level and blood albumin level of LN patients. CONCLUSIONS: IL-23 is highly expressed in the serum of LN patients, and its expression is closely related to the occurrence of LN. Also, the expression of TLR9 is up-regulated in the tubulointerstitium of LN patients, which is correlated with relevant clinical indexes.

EDACO, a derivative of myricetin, inhibits the differentiation of Gaoyou duck embryonic osteoclasts in vitro.

1. This study determined the effects of (E)-3-(2-(4-(3-(2,4-dimethoxyphenyl)acryloyl)phenoxy)ethoxy)-5,7-dimethoxy-2-(3,4,5-trimethoxyphenyl)-4H-chromen-4-one (EDACO) on the differentiation of Gaoyou duck embryonic osteoclasts cultured in vitro. 2. Bone marrow mononuclear cells (BM-MNC) were collected from 23-d-old Gaoyou duck embryos and induced by macrophage colony-stimulating factor and receptor activator of nuclear factor κB ligand in the presence of EDACO at different concentrations (i.e. 10, 20, 40, 80 and 160 µM). Tartrate-resistant acid phosphatase (TRAP) staining and resorption ability determination were conducted. 3. Results suggested that EDACO suppressed the shaping of positive multinucleated cells and the number of TRAP-positive cells in the 20, 40, 80 and 160 µM EDACO groups was significantly decreased (P < 0.05 or P < 0.01). Besides, the absorption activity of differentiated duck embryonic osteoclasts was significantly inhibited (P < 0.05) in both 80 and 160 µM EDACO groups. 4. Overall, EDACO can inhibit the differentiation of BM-MNC into mature osteoclasts in duck embryos.1.

[Retrospective clinical analyses of otogenic intracranial infections].

Objective: To investigate the clinical characteristics and treatment options for otogenic intracranial infections. Method: Clinical records of all the patients of otogenic intracranial infections admitted to the First Affiliated Hospital of Zhejiang University from 2008 to 2016 were retrospectively analyzed. Their clinical presentations, radiological findings, culture results, and medical and surgical therapy modalities, as well as treatment outcomes were studied. Results: Sixteen cases were identified. The majority of the otogenic patients had a history of cholesteatoma, other rare events included congenital cerebrospinal fluid otorhinorrhea, Gorham-Stout disease and after radiation therapy for nasopharyngeal carcinoma. Meningitis, cerebral venous thrombosis and brain abscess were the primary intracranial infection. Eight patients had received modified radical mastoidectomy at least one time. Results of routine culture for cerebrospinal and pus samples had high negative rate. All patients received initial empirical broadspectrum intravenous antibiotics therapy. Four cases of brain abscesses were drained or excised at the same time for otologic surgery. The mortality rate was 6.25% (1 case). Conclusions: Cholesteatoma is still the most commonly primary disease of otogenic intracranial complications. Diagnosis and treatment of otogenic intracranial infections require multidisciplinary cooperation. Surgical intervention for primary ear lesions and intracranial abscess is still the main option in the treatment of otogenic intracranial infections.

MiR-124a inhibits proliferation and invasion of rheumatoid arthritis synovial fibroblasts.

OBJECTIVE: To investigate the impact of miR-124Aa on the proliferation, invasion and cytokine excretion of rheumatoid arthritis synovial fibroblasts (RASFs) in patients with rheumatoid arthritis (RA). PATIENTS AND METHODS: RASFs were separated for in-vitro culture, and transfected using lipidosome that connected with chemically synthesized miR-124a mimic or miR-124a inhibitor. Then, MTT, transwell chamber, and flow-cytometry were used to detect the impact on the proliferation, invasion, and apoptosis of RASFs; RT-PCR and Western-blotting were employed to measure the effect of miR-124a on the expressions of matrixmetalloproteinase3/13 (MMP3/13) and interleukin1ß (IL-1ß) of RASFs. RESULTS: miR-124a significantly suppresses the proliferation of RASFs, while inhibits the invasion of RASFs. The flow cytometry indicated that miR-124a showed no significant effect on the apoptosis of RASFs. Finally, miR-124a downregulates the expressions of MMP3/13 and IL-1ß. CONCLUSIONS: MiR-124a is of great significance for the onset of RA by inhibiting the proliferation and invasion of RASFs possibly through downregulating the expression of MMP3/13 and IL-1ß.

Longissimus dorsi muscle transcriptomic analysis of Yunling and Chinese simmental cattle differing in intramuscular fat content and fatty acid composition.

Intramuscular fat (IMF) content and fatty acid (FA) composition vary significantly across beef cattle breeds, which play an important role in taste and nutritional value. However, the molecular mechanisms underlying these phenotypic differences remain unknown. The present study compared meat quality traits between Yunling cattle and Chinese Simmental cattle. Yunling cattle showed a lower IMF content and proportion of monounsaturated fatty acids (MUFA), as well as higher proportions of saturated fatty acids (SFA), polyunsaturated fatty acids (PUFA), and short-chain fatty acids (sc-FA) in the longissimus dorsi (LD) muscle than Chinese Simmental cattle. To further identify the candidate genes and pathways responsible for these phenotypic differences, the transcriptome of LD muscle from the two breeds were measured using RNA-seq. A total of 1347 differentially expressed genes were identified. The major metabolic pathways that were differentially modulated were lipolysis and glycometabolism. Yunling cattle showed a higher expression of lipolysis genes (ALDH9A1, ACSL5, ACADM, ACAT2, ACOT2) and a lower expression of genes related to glycometabolism (PGM1, GALM, PGM1, GPI, LDHA). This research identified candidate genes and pathways for IMF content and FA composition in the LD muscle of beef cattle, which may facilitate the design of new selection strategies to improve meat quality.

[Effect of acidic oligosaccharides on P-selectin of pulmonary hypertensive rats induced by monocrotaline].

Objective: To observe the effects of acidic oligosaccharides (AOS) on P-selectin levels in the serum and the pulmonary arteries of pulmonary hypertensive rats induced by monocrotaline. Methods: Sixty healthy adult male Sprague-Dawley rats were randomly divided into control group (n=10), model group (n=10), Alprostadil group (n=10), low-dose AOS group (AOS-L, n=10), medium-dose AOS group (AOS-M, n=10) and high-dose AOS group (AOS-H, n=10). The rat model of pulmonary arterial hypertension was made by a single intraperitoneal injection of monocrotaline(60 mg/kg). Five weeks after injection, pulmonary arterial (PA) acceleration time (PAT) and ejection time (ET) were measured by color Doppler ultrasound. Then, the Alprostadil group was treated by Alprostadil 5 µg·kg(-1)·d(-1)intraperitoneally. Acidic oligosaccharides was administered by intraperitoneal injection to rats in the AOS-L group(5 kg(-1)·d(-1)), AOS-M group (10 mg·kg(-1)·d(-1))and AOS-H group (20 mg·kg(-1)·d(-1)). Control group and model group were given normal saline instead. At the end of experiments, the death rate was recorded and PAT/ET was measured. We calculated the right ventricular hypertrophy index (RVHI) of all rats sacrificed under anesthesia. Precision-cut lung slices were stained with HE for observation of the structure of middle and small arteries. The expression level of P-selectin in serum and pulmonary arterial tissues were detected by ELISA and Western blot respectively. Results: AOS significantly increased the level of PAT/ET (P<0.01), and attenuated RVHI (P<0.01). AOS significantly improved intima-media proliferation in small-to medium-sized pulmonary arteries, and attenuated perivascular inflammation. AOS and Alprostadil significantly down-regulated the protein expression of P-selectin in serum and pulmonary arteries (P<0.01). Conclusion: In this rat model of monocrotaline-induced pulmonary hypertension, AOS decreased the expressions of P-selectin in serum and pulmonary arteries in a dose-dependent manner.

[Therapeutic effect of AngioJet mechanical thrombus aspiration system combined with catheter directed thrombolysis on acute deep vein thrombosis].

Objective: To analyze the curative effect of AngioJet mechanical thrombus aspiration combined with catheter directed thrombolysis (CDT) on acute lower extremity deep vein thrombosis (LEDVT). Methods: The clinical data of 20 cases of acute LEDVT treated by AngioJet combined with CDT were analyzed. The inferior vena cava filter was implanted preoperatively, and then the thrombolysis was performed by using AngioJet. The thrombolytic catheter was placed for CDT treatment, and the thrombolysis was evaluated by review angiography. Results: All cases were successfully punctured and catheterized. The suction time was (235±75) seconds. The usage of urokinase was (180±90)*10(4) U. The differences before and after thrombolysis of ipsilateral and contralateral thigh circumference were (8.3±1.5) cm and (2.5±1.0) cm, respectively. The differences before and after thrombolysis of the ipsilateral and contralateral calf circumference were (2.4±1.0)cm and (1.5±0.7) cm, respectively. All of which had statistical significant (P<0.01). Conclusion: AngioJet mechanical thrombus aspiration system is a novel and safe method for the treatment of acute LEDVT. When used in conjunction with CDT, its advantages was more significant.

[Internal fixation and hemiarthroplasty for the treatment of displaced femoral neck fracture: a cost-utility analysis].

Objective: To compare the cannulated screw internal fixation (IF) and hemiarthroplasty (HA) for displaced femoral neck fracture with cost-utility analysis (CUA). Methods: From January 2014 to August 2015, a total of 87 patients above 60 years old with displaced femoral neck fracture were admitted into the study and divided into 2 groups according to surgery type. There were 41 cases in IF group and 46 cases in HA group. During 1 year follow-up we collected the total cost due to fracture and applied EQ-5D index to evaluate the clinical effects. The value of EQ-5D index will be transformed to quality adjusted life year (QALY). Eventually the data including cost and QALY were used to calculate the cost utility ratio (CUR) for patients in each group. Results: All the patients completed the operation successfully. The total cost of IF and HA was 45 796 yuan and 56 657 yuan (P<0.05), while the QALY was 0.79 and 0.83 respectively (P>0.05). The CUR showed that patients in IF and HA group spent 57 970 yuan and 68 261 yuan for each QALY which means patients in HA group spent more 10 292 yuan for each QALY than that in IF group. Conclusions: Both IF and HA can provide satisfactory clinical outcome in 1 year follow-up, however the total cost of IF was obviously less than HA. Therefore IF may be more cost-effective for the treatment of displaced femoral neck fracture in terms of health economics.

Epidemiological features and spatio-temporal clusters of hand-foot-mouth disease at town level in Fuyang, Anhui Province, China (2008-2013).

Hand-foot-mouth disease (HFMD) is a frequently occurring epidemic and has been an important cause of childhood mortality in China. Given the disease's significant impact nationwide, the epidemiological characteristics and spatio-temporal clusters in Fuyang from 2008 to 2013 were analysed in this study. The disease exhibits strong seasonality with a rising incidence. Of the reported HFMD cases, 63·7% were male and 95·2% were preschool children living at home. The onset of HFMD is age-dependent and exhibits a 12-month periodicity, with 12-, 24- and 36-month-old children being the most frequently affected groups. Across the first 60 months of life, children born in April [relative risk (RR) 8·18], May (RR 9·79) and June (RR 8·21) exhibited an elevated infection risk of HFMD relative to January-born children; the relative risk compared with the reference (January-born) group was highest for children aged 24 months born in May (RR 34·85). Of laboratory-confirmed cases, enterovirus 71 (EV71), coxsackie A16 (Cox A16) and other enteroviruses accounted for 60·1%, 7·1% and 32·8%, respectively. Spatio-temporal analysis identified one most likely cluster and several secondary clusters each year. The centre of the most likely cluster was found in different regions in Fuyang. Implications of our findings for current and future public health interventions are discussed.

Methylation analysis of CXCR1 in mammary gland tissue of cows with mastitis induced by Staphylococcus aureus.

Mastitis is the most important disease in the global dairy industry, and causes large economic losses. Staphylococcus aureus is one of most common pathogens that cause bovine mastitis. CXCR1 has been implicated as a prospective genetic marker for mastitis resistance in dairy cows; CXCR1 expression significantly increases when cows have mastitis. To investigate the mechanisms involved in its increased expression, bisulfite sequencing polymerase chain reaction (PCR) was used to detect the methylation status of CXCR1 CpG island, and quantitative fluorescence PCR was used to detect CXCR1 expression in bovine mammary tissue induced with S. aureus in three Chinese Holstein cows. No CpG island was found for bovine CXCR1 in the upstream 2-kb region, whereas one CpG island that contained 13 CpG sites was found in exon 1 of CXCR1. All of the CpG sites were under hypermethylation from 90 to 100% in the mammary tissues. When the mammary gland mRNA expression of CXCR1 was 12.10-fold higher in infected cow quarters than in uninfected quarters, the methylation levels of the CpG site at position 519 were significantly lower in the infected quarters than in the uninfected quarters. Pearson correlation analysis showed that the methylation level at position 519 was significantly negatively correlated with the CXCR1 mRNA expression level (P < 0.05). These results indicate that the methylation of the CpG site at position 519 may regulate CXCR1 expression in cows with mastitis induced by S. aureus, but further studies are needed to elucidate the mechanisms involved.

Identification of long non-coding RNA involved in osteogenic differentiation from mesenchymal stem cells using RNA-Seq data.

The aim of this study was to identify long non-coding RNA (lncRNA) associated with osteogenic differentiation from mesenchymal stem cells (MSCs) using high-throughput RNA sequencing (RNA-Seq) data. RNA-Seq dataset was obtained from the European Bioinformatics Institute (accession No. PRJEB4496), including two replicates each for immortalized mesenchymal stem cells iMSC#3 cultured in growth medium (GM) and differentiation medium (DM) for 28 days. The clean reads were aligned to a hg19 reference genome by Tophat and assembled by Cufflinks to identify the known and novel transcripts. RPKM values were calculated to screen for differentially expressed RNA. Novel lncRNA were screened based on various filter criteria. Subsequently, the underlying function of novel lncRNAs were predicted by functional annotation by ERPIN, a co-expression network was constructed by WGCNA and the KEGG pathway enriched by KOBAS. A total of 3171 RNA differentially expressed between the DM and GM groups (2597 mRNA and 574 lncRNA) were identified. Among the 574 differentially expressed lncRNA, 357 were known and 217 were novel lncRNA. Furthermore, 32 novel lncRNA were found to be miRNA precursors (including miR-689, miR-640, miR-601, and miR-544). A total of 14,275 co-expression relationships and 217 co-expression networks were obtained between novel lncRNA and mRNA. The differentially expressed lncRNA and mRNA were enriched into 6 significant pathways, including those for cancer, ECM-receptor interaction, and focal adhesion. Therefore, novel lncRNAwere identified and their underlying function predicted, which may provide the basis for future analyses of the role of lncRNA in osteoblastic differentiation.

Association of SCD1 and DGAT1 SNPs with the intramuscular fat traits in Chinese Simmental cattle and their distribution in eight Chinese cattle breeds.

Intramuscular fat (IMF) is a key parameter for evaluation of nutritional quality of beef, with its endogenous synthesis regulated by stearoyl CoA desaturase (SCD1) and diacylglycerol-acyl transferase 1 (DGAT1) genes in cattle. The object of this research was to evaluate the effect of SCD1 and DGAT1 polymorphisms on IMF trait in beef cattle and to estimate the frequency distribution of SNPs in the two genes in Chinese cattle populations. The SCD1 and DGAT1 polymorphisms were detected by PCR-single strand conformation polymorphism (PCR-SSCP) method in Chinese Simmental cattle and their associations with IMF traits were analyzed using the general linear model (GLM). The frequency distribution of SNPs in SCD1 and DGAT1 genes were detected by PCR-SSCP method and analyzed in seven other cattle populations. The results showed significant associations of SNPs SCD1-878, SCD1-762, and DGAT1 10433 and 10434 with IMF (%) and shearing force values (SFV; kg) in Chinese Simmental cattle. A haplotype combining SCD1-878C, SCD1-762T, and DGAT1 10433 and 10434-GC had the highest IMF, marbling score and shearing force. The polymorphic investigation indicated that the frequency of SCD1-878C or SCD1-762T was significantly higher in Chinese southern cattle (Leiqiong, Yunnan High pump, BMY or Minnan Cattle) than in Chinese northern cattle (Chinese Simmental, Luxi Cattle, Bohai Black or Chinese Holstein), while the frequency of DGAT1 10433 and 10434-GC in Chinese indigenous breed (Leiqiong, Yunnan High pump, BMY, Luxi Cattle, Bohai Black, or Minnan Cattle) was significantly lower than breeds with imported blood (Chinese Simmental or Chinese Holstein). These findings demonstrated that both the SCD1 and DGAT1 SNPs were prospect genetic markers for IMF traits, and the SCD1 SNPs could be used as a genetic marker for southern or northern blood in Chinese cattle.

Calponin expression in laryngeal myoepithelial carcinoma and its prognostic implications: a case report and literature review.

A case report of laryngeal myoepithelial carcinoma (MEC) is presented and the literature concerning prognostic factors in MEC is reviewed. A 61-year old man was admitted to hospital with hoarseness and progressive dyspnoea. On examination, both vocal cords were fixed in the midline with a glottic fissure of only 3 mm. No tumour was seen, but the subglottis was not completely visible. A computed tomography scan showed a soft mass below the right vocal cord obstructing two-thirds of the larynx. On suspension laryngoscopy, a dull mass (1.5 x 1.5 cm) was seen below the right vocal cord, which was malignant on frozen biopsy. A total laryngectomy was performed and the patient received radiotherapy. He died of recurrence 25 months later. The tumour was positive for cytokeratin 14, S-100 protein and calponin. MEC of the larynx is extremely rare. The clinical behaviour of MEC is variable and prognostic factors have been poorly analysed. Calponin expression may be a prognostic factor, but other factors also affect the outcome in MEC.

Milk trait heritability and correlation with heterozygosity in yak.

382 yak cows were examined for milk yield, fat, protein and lactose contents. Six polymorphic loci, alphas1-CN, kappa-CN, beta-CN, beta-Lg, alpha-La and MUC-1, were scored by PAGE electrophoresis for each individual. The values of milk yield, fat, protein and lactose content were 247.13 kg, 5.81%, 5.18% and 4.93%, respectively. Based on the 6 polymorphism loci, the average heterozygosity of the yak population was 0.1794. Calculated by the marker-based method, heritability estimates for milk yield, fat, protein and lactose contents were 0.353 +/- 0.093, 0.316 +/- 0.101, 0.415 +/- 0.098 and 0.481 +/- 0.035, respectively. The relatively high or medium heritability of these traits indicate that it is feasible to rely directly on them in breeding for the improvement in a relatively short period. The significant linear regression between heterozygosity and fat percentage with a positive slope (R = 0.0420) indicated that inbreeding affected milk fat content in this population.

[The electrostatic protection of the medical devices & equipments].

This paper describes the harms of the static electricity to medical devices & equipments and its protection.