Molecular cloning and functional analyses of C-C motif chemokine ligand 3 (CCL3) in mandarin fish Siniperca chuatsi.

Chemokines are critical molecules involved in immune reaction and immune system homeostasis, and some chemokines play a role in antiviral immunity. It is not known if the C-C motif chemokine ligand 3 (CCL3), a member of the CC chemokine family, possesses antiviral properties in fish. In this study, a ccl3 was cloned from the mandarin fish (Siniperca chuatsi), and it has an open reading frame (ORF) of 276 base pairs, which are predicted to encode a 91-amino acid peptide. Mandarin fish CCL3 revealed conserved sequence features with four cysteine residues and closely relationships with the CCL3s from other vertebrates based on the sequence alignment and phylogenetic analysis. The transcripts of ccl3 were notably enriched in immune-related organs, such as spleen and gills in healthy mandarin fish, and the ccl3 was induced in the isolated mandarin fish brain (MFB) cells following infection with infectious spleen and kidney necrosis virus (ISKNV). Moreover, in MFB cells, overexpression of CCL3 induced immune factors, such as IL1ß, TNFα, MX, IRF1 and IFNh, and exhibited antiviral activity against ISKNV. This study sheds light on the immune role of CCL3 in immune response of mandarin fish, and its antiviral defense mechanism is of interest for further investigation.

Effects of sports on school adaptability, resilience and cell phone addiction tendency of high school students.

BACKGROUND: Sport help promote healthy physical and mental development of high school students. To date, there have been few studies on the effect of sport on school adaptability, resilience and cell phone addiction tendency of high school students. AIM: To explore the effects of sports on school adaptability, resilience and cell phone addiction of high school students. METHODS: A stratified random sampling method was used to select 600 students from two high schools in Lhasa, and Physical Activity Rating Scale, School Adjustment Scale for High School Students, Chinese Adolescents Resilience Scale, and Mobile Phone Addiction Index were used for field questionnaire survey. RESULTS: Sport was positively correlated with school adaptability and resilience (P < 0.01), school adaptability was positively correlated with resilience (P < 0.01) and cell phone addiction was negatively correlated with sports, school adaptability and resilience (P < 0.01). The direct effect of sport on cell phone addiction was significant (P < 0.001), accounting for 20.51% of the total effect. The mediating effect of school adaptability on sport and cell phone addiction was significant (P < 0.001), accounting for 17.38% and 35.36% of the total effect value, respectively. School adjustment and resilience had a significant chain-mediated effect on sport and cell phone addiction (P < 0.001), accounting for 26.75% of the total effect. CONCLUSION: Sport affected the cell phone addiction tendency of senior high school students through the mediating effect of school adaptability and resilience, and through the chain mediation effect of both.

Unraveling and characterization of novel T3SS effectors in Edwardsiella piscicida.

Type III secretion system (T3SS) facilitates survival and replication of Edwardsiella piscicida in vivo. Identifying novel T3SS effectors and elucidating their functions are critical in understanding the pathogenesis of E. piscicida. E. piscicida T3SS effector EseG and EseJ was highly secreted when T3SS gatekeeper-containing protein complex EsaB-EsaL-EsaM was disrupted by EsaB deficiency. Based on this observation, concentrated secretomes of ΔesaB strain and ΔesaBΔesaN strain were purified by loading them into SDS-PAGE gel for a short electrophoresis to remove impurities prior to the in-the gel digestion and mass spectrometry. Four reported T3SS effectors and two novel T3SS effector candidates EseQ (ETAE_2009) and Trx2 (ETAE_0559) were unraveled by quantitative comparison of the identified peptides. EseQ and Trx2 were revealed to be secreted and translocated in a T3SS-dependent manner through CyaA-based translocation assay and immunofluorescent staining, demonstrating that EseQ and Trx2 are the novel T3SS effectors of E. piscicida. Trx2 was found to suppress macrophage apoptosis as revealed by TUNEL staining and cleaved caspase-3 of infected J774A.1 monolayers. Moreover, Trx2 has been shown to inhibit the p65 phosphorylation and p65 translocation into the nucleus, thus blocking the NF-κB pathway. Furthermore, depletion of Trx2 slightly but significantly attenuates E. piscicida virulence in a fish infection model. Taken together, an efficient method was established in unraveling T3SS effectors in E. piscicida, and Trx2, one of the novel T3SS effectors identified in this study, was demonstrated to suppress apoptosis and block NF- κB pathway during E. piscicida infection. IMPORTANCE Edwardsiella piscicida is an intracellular bacterial pathogen that causes intestinal inflammation and hemorrhagic sepsis in fish and human. Virulence depends on the Edwardsiella type III secretion system (T3SS). Identifying the bacterial effector proteins secreted by T3SS and defining their role is key to understanding Edwardsiella pathogenesis. EsaB depletion disrupts the T3SS gatekeeper-containing protein complex, resulting in increased secretion of T3SS effectors EseG and EseJ. EseQ and Trx2 were shown to be the novel T3SS effectors of E. piscicida by a secretome comparison between ∆esaB strain and ∆esaB∆esaN strain (T3SS mutant), together with CyaA-based translocation assay. In addition, Trx2 has been shown to suppress macrophage apoptosis and block the NF-κB pathway. Together, this work expands the known repertoire of T3SS effectors and sheds light on the pathogenic mechanism of E. piscicida.

Chinese Expert Consensus on the Use of Biologics in Patients with Chronic Rhinosinusitis (2022, Zhuhai).

BACKGROUND: Chronic rhinosinusitis (CRS) is a common inflammatory disease in otolaryngology, mainly manifested as nasal congestion, nasal discharge, facial pain/pressure, and smell disorder. CRS with nasal polyps (CRSwNP), an important phenotype of CRS, has a high recurrence rate even after receiving corticosteroids and/or functional endoscopic sinus surgery. In recent years, clinicians have focused on the application of biological agents in CRSwNP. However, it has not reached a consensus on the timing and selection of biologics for the treatment of CRS so far. SUMMARY: We reviewed the previous studies of biologics in CRS and summarized the indications, contraindications, efficacy assessment, prognosis, and adverse effects of biologics. Also, we evaluated the treatment response and adverse reactions of dupilumab, omalizumab, and mepolizumab in the management of CRS and made recommendations. KEY MESSAGES: Dupilumab, omalizumab, and mepolizumab have been approved for the treatment of CRSwNP by the US Food and Drug Administration. Type 2 and eosinophilic inflammation, need for systemic steroids or contraindication to systemic steroids, significantly impaired quality of life, anosmia, and comorbid asthma are required for the use of biologics. Based on current evidence, dupilumab has the prominent advantage in improving quality of life and reducing the risk of comorbid asthma in CRSwNP among the approved monoclonal antibodies. Most patients tolerate biological agents well in general with few major or severe adverse effects. Biologics have provided more options for severe uncontrolled CRSwNP patients or patients who refuse to have surgery. In the future, more novel biologics will be assessed in high-quality clinical trials and applied clinically.

Investigation on fresh bamboo replacing rice husks for brewing light-aroma Baijiu.

Husks are the main source of bran and furfural flavor in traditional Chinese light-aroma Baijiu, but they negatively affect its smell and taste. Here, bran husks were replaced with fresh bamboo to brew light-aroma Baijiu. Flavor components in Jiupei and Baijiu were detected through headspace solid-phase microextraction with gas chromatography-mass spectrometry, and physicochemical properties were assessed; flavor results were obtained from correlation, principal component, and cluster analyses. Starch and reducing sugar content in Jiupei negatively correlated with moisture, alcohol content, and acidity. Fresh bamboo reduced furfural from bran husks in Jiupei by 88.5% and increased alcohol distillation by 51%; it also improved starch efficiency (5%). Surprisingly, isovanillin was found to be present in Baijiu. Total Baijiu yield (57% ± 2.01%) was attained when crushed bamboo size was 1.5 cm × 0.3 cm × 0.3 cm. This study supports the use of fresh bamboo (an eco-friendly alternative for husks) in brewing light-aroma Baijiu. PRACTICAL APPLICATION: The use of fresh bamboo as a replacement for rice husks in brewing light-aroma Baijiu was investigated. It attenuated the chaff taste in light-aroma Baijiu and increased the liquor yield. Surprisingly, isovanillin was also present in the base Baijiu, and it added to the fragrance. This study not only supports the use of bamboo as an auxiliary material for brewing light-aroma Baijiu but also provides a reference for brewing light-aroma Baijiu with alternative auxiliary materials.

Mechanically controllable nonreciprocal transmission and perfect absorption of photons.

Photon absorption and nonreciprocal photon transmission are studied in a rotating optical resonator coupled with an atomic ensemble. It is demonstrated that the perfect photon absorption is accompanied by optical bistability when the resonator is static. If the spinning detune is adjusted to some particular values, we find that the amplified unidirectional photon transmission can be realized. We have explicitly given the perfect photon absorption conditions and the maximal adjustable amplification rate. It is found that the coupling of the resonator and the atomic ensemble is necessary for perfect photon absorption, and the phase difference of the two input fields only affects the perfect absorption point. It gives new insight into the design of photon absorbers and optical switches.

Erratum: Resveratrol counteracts bone loss via mitofilin-mediated osteogenic improvement of mesenchymal stem cells in senescence-accelerated mice: Erratum.

[This corrects the article DOI: 10.7150/thno.23620.].

Sympathetic Neurostress Drives Osteoblastic Exosomal MiR-21 Transfer to Disrupt Bone Homeostasis and Promote Osteopenia.

Innervation and extracellular vesicle secretion co-exist in the local tissue microenvironment for message transfer, but whether they are interconnected to regulate organ homeostasis remains unknown. Sympatho-adrenergic activation is implicated in stress-induced depression and leads to bone loss, but the mechanisms and therapeutics are incompletely elucidated. Here, it is revealed that sympathetic neurostress through the ß1/2 -adrenergic receptor (ß1/2-AR) signaling triggers the transcription response of a microRNA, miR-21, in osteoblasts, which is transferred to osteoclast progenitors via exosomes for dictating osteoclastogenesis. After confirming that miR-21 deficiency retards the ß1/2-AR agonist isoproterenol (ISO)-induced osteopenia, it is shown that the pharmacological inhibition of exosome release by two clinically-relevant drugs, dimethyl amiloride and omeprazole, suppresses osteoblastic miR-21 transfer and ameliorates bone loss under both ISO and chronic variable stress (CVS)-induced depression conditions. A targeted delivery approach to specifically silence osteoblastic miR-21 is further applied, which is effective in rescuing the bone remodeling balance and ameliorating ISO- and CVS-induced osteopenias. These results decipher a previously unrecognized paradigm that neural cues drive exosomal microRNA communication to regulate organ homeostasis and help to establish feasible strategies to counteract bone loss under psychological stresses.

Reclassification of Olsenella gallinarum as Thermophilibacter gallinarum comb. nov. and description of Thermophilibacter immobilis sp. nov., isolated from the mud in a fermentation cellar used for the production of Chinese Luzhou-flavour Baijiu.

A novel Gram-stain-positive, strictly anaerobic, elliptical, non-motile and non-flagellated bacterium, designed LZLJ-2T, was isolated from the mud in a fermentation cellar used for the production of Chinese Luzhou-flavour Baijiu. Growth occurred at 28-45 °C (optimum, 37 °C), at pH 6.0-7.0 (optimum, pH 6.0) and with concentrations of NaCl up to 2 % (w/v; optimum, 0 %). On the basis of 16S rRNA gene sequence similarity, strain LZLJ-2T belonged to the genus Thermophilibacter and was most closely related to Thermophilibacter mediterraneus Marseille-P3256T (similarity 96.9 %), Olsenella gallinarum ClaCZ62T (similarity 96.6 %) and Thermophilibacter provencensis Marseille-P2912T (similarity 96.4 %). In addition, strain LZLJ-2T had high similarity to the genus Olsenella, including Olsenella profusa DSM 13989T (similarity 94.9 %), Olsenella umbonata DSM 22620T (similarity 94.9 %), Olsenella uli ATCC 49627T (similarity 94.22 %), Tractidigestivibacter scatoligenes DSM 28304T (similarity 93.9 %) and Paratractidigestivibacter faecalis KCTC 15699T (similarity 93.25 %). Comparative genome analysis showed that orthoANI values between strain LZLJ-2T and Thermophilibacter mediterraneus Marseille-P3256T, Olsenella gallinarum ClaCZ62T, Thermophilibacter provencensis Marseille-P2912T, Olsenella profusa DSM 13989T, Olsenella umbonata DSM 22620T, Olsenella uli ATCC 49627T, Tractidigestivibacter scatoligenes DSM 28304T and Paratractidigestivibacter faecalis KCTC 15699T were 78.68, 78.99, 78.29, 73.40, 74.00, 74.30, 75.08 and 77.23 %, and the genome-to-genome distance values were respectively 22.3, 22.5, 22.4, 19.6, 20.5, 19.7, 20.5 and 21.5 %. The genomic DNA G+C content of strain LZLJ-2T was 65.21 mol%. The predominant cellular fatty acids (>10 %) of strain LZLJ-2T were C18 : 1 cis 9 (33.7 %), C14 : 0 (22.0 %) and C18 : 1 cis 9 DMA (13.5 %). d-Glucose, sucrose, mannose, maltose, lactose (weak), salicin, glycerol (weak), cellobiose and trehalose (weak) could be used by strain LZLJ-2T as sole carbon sources. Enzyme activity results showed positive reactions with valine arylamidase, leucine arylamidase, crystine arylamidase, acid phosphatase, alkaline phosphatase, esterase (C4) (weakly positive), naphthol-AS-BI-phosphohydrolase, α-glucosidase and ß-glucosidase. The major end products of glucose fermentation were lactic acid and acetic acid. It produced skatole from indole acetic acid, and produced p-cresol from modified peptone-yeast extract medium with glucose. Based on the 16S rRNA gene trees as well as the genome core gene tree, it is suggested that Olsenella gallinarum are transferred to genus Thermophilibacter as Thermophilibacter gallinarum comb. nov. Based on phenotypic, genotypic and phylogenetic data, strain LZLJ-2T is considered to represent a novel species of the genus Thermophilibacter, for which the name Thermophilibacter immobilis sp. nov. is proposed. The type strain is LZLJ-2T (=KCTC 25162T=JCM 34224T).

Blautia liquoris sp. nov., isolated from the mud in a fermentation cellar used for the production of Chinese strong-flavour liquor.

A novel Gram-positive, non-motile, non-flagellated, strictly anaerobic, non-spore-forming and dumbbell-shaped, coccoid- or chain-shaped bacterium, designated strain LZLJ-3T, was isolated from a mud fermentation cellar which has been used for the production of Chinese strong-flavour liquor for over 100 years. Strain LZLJ-3T grew at 20-40 °C (optimum, 37 °C), at pH 6.0-8.0 (optimum, pH 8.0) and with NaCl concentrations up to 1 % (w/v; optimum, 0 %). Phylogenetic trees established based on 16S rRNA gene sequences showed that strain LZLJ-3T belonged to the genus Blautia of the family Lachnospiraceae, with the highest sequence similarity to Blautia stercoris GAM6-1T (91.7 %) and Blautia faecicola KGMB01111T (91.7 %). Comparative genome analysis showed that the orthologous average nucleotide identity (OrthoANI) and genome-to-genome distance (GGD) values between strain LZLJ-3T and B. stercoris GAM6-1T were respectively 69.1 and 22.9 %; the OrthoANI and GGD values between strain LZLJ-3T and B. faecicola KGMB01111T were respectively 70.86 and 36 % . The DNA G+C content of strain LZLJ-3T genome was 42.1 mol%. The predominant celluar fatty acids (>10 %) of strain LZLJ-3T were C16 : 0 FAME (27.9 %), C14 : 0 FAME (17.6 %) and C16 : 0 DMA (13.0 %). Arabinose, glucose and maltose could be utilized by strain LZLJ-3T as sole carbon sources for growth, with weak utilization of raffinose and l-fucose. API ZYM analysis gave positive reactions with α-galactosidase, ß-galactosidase, α-glucosidase and ß-glucosidase. The major end product of glucose fermentation was acetic acid. Based on the results of phenotypic, genotypic and phylogenetic analyses, strain LZLJ-3T is considered to represent a novel species of Blautia, for which the name Blautia liquoris sp. nov. is proposed. The type strain is LZLJ-3T (=KCTC 25163T=CGMCC 1.5299T=JCM 34225T).

Association between hydrogen sulfide and OSA-associated hypertension: a clinical study.

PURPOSE: We sought to unravel the role of hydrogen sulfide (H2S) in the development of hypertension in patients with obstructive sleep apnea (OSA). METHODS: The study sample included 80 patients with OSA and 45 healthy controls. All subjects underwent measurement of blood pressure (BP) and serum H2S level in the morning. Twentynine of the 39 patients with OSA and concomitant hypertension and 23 of the 41 patients with OSA but no concomitant hypertension received continuous positive alveolar pressure (CPAP) therapy for 4 weeks. Twenty-four-hour ambulatory BP and serum H2S were determined before and after CPAP. Respiratory indices including apnea hypopnea index (AHI), lowest oxygen saturation (SaO2), and length of time < 90% saturated (T90) were determined by polysomnography. RESULTS: Associations between H2S, BP, respiratory indices, and changes with CPAP were analyzed. OSA patients had significantly higher systolic BP (p = 0.003) and diastolic BP (p = 0.009) and lower H2S levels (p = 0.02) compared to healthy controls. H2S negatively correlated with AHI (p = 0.005), T90 (p = 0.009), morning systolic BP (p = 0.02), and morning diastolic BP (p = 0.03). All respiratory indices were significantly improved (p < 0.05) after CPAP in OSA patients with or without hypertension. BP was significantly reduced and H2S significantly increased after CPAP in OSA patients with hypertension (p < 0.05) but not in OSA patients without hypertension (p > 0.05). CONCLUSION: Multivariate linear regression analysis demonstrated that 24h systolic BP and 24h diastolic BP correlated with H2S as well as their changes after CPAP treatment. Reduction in H2S may play a role in the pathogenesis of hypertension in patients with OSA.

Impact of obstructive sleep apnea on pulmonary hypertension in patients with chronic obstructive pulmonary disease.

BACKGROUND: Chronic obstructive pulmonary disease (COPD) and obstructive sleep apnea (OSA) syndrome are highly prevalent respiratory conditions. Their coexistence is referred to as the overlap syndrome. They are both related to pulmonary hypertension (PH) development. This study investigated the effects of OSA on PH in patients with COPD and the associated factors. METHODS: Consecutive patients with stable COPD were recruited for an observational cross-sectional study from September 2016 to May 2018 at Peking University Third Hospital. In total, 106 patients with COPD were enrolled and performed home portable monitoring and echocardiography. OSA was defined by an apnea hypopnea index (AHI) ≥10 events/h. Based on OSA absence or presence, patients were divided into the COPD with OSA and COPD without OSA groups. Factors affecting pulmonary artery pressure (PAP) and PH were identified using univariate analysis and logistic regression models. RESULTS: In the 106 patients with COPD, the mean age was 69.52 years, 91.5% were men, and the mean forced expiratory volume in 1 s (FEV1) percentage of predicted was 56.15%. Fifty-six (52.8%) patients with COPD were diagnosed with OSA, and 24 (22.6%) patients with COPD were diagnosed as PH. Compared with COPD without OSA group, the median PAP in COPD with severe OSA group increased by 5 mmHg (36.00 [26.00-50.00] mmHg vs. 31.00 [24.00-34.00] mmHg, P = 0.036). COPD with percent of night-time spent with oxygen saturation below 90% (T90) > 10% group had higher PAP than COPD with T90 ≤ 1% group (36.00 [29.00-50.00)] mmHg vs. 29.00 [25.50-34.00] mmHg, F = 7.889, P = 0.007). Univariate analysis revealed age, FEV1% predicted, T90, and Charlson index had statistically significant effects on PH. Multiple regression analysis showed a significant and independent effect of both FEV1% predicted (odds ratio [OR] = 3.46; 95% confidence interval [CI]: 1.15-10.46; P = 0.028) and AHI (OR = 3.20; 95% CI: 1.09-19.35; P = 0.034) on PH. CONCLUSIONS: Patients with COPD with OSA are more susceptible to PH, which is associated with declining lung function and increased severity of OSA. Thus, nocturnal hypoxemia and OSA in elderly patients with COPD should be identified and treated.

Resveratrol counteracts bone loss via mitofilin-mediated osteogenic improvement of mesenchymal stem cells in senescence-accelerated mice.

Rational: Senescence of mesenchymal stem cells (MSCs) and the related functional decline of osteogenesis have emerged as the critical pathogenesis of osteoporosis in aging. Resveratrol (RESV), a small molecular compound that safely mimics the effects of dietary restriction, has been well documented to extend lifespan in lower organisms and improve health in aging rodents. However, whether RESV promotes function of senescent stem cells in alleviating age-related phenotypes remains largely unknown. Here, we intend to investigate whether RESV counteracts senescence-associated bone loss via osteogenic improvement of MSCs and the underlying mechanism. Methods: MSCs derived from bone marrow (BMMSCs) and the bone-specific, senescence-accelerated, osteoblastogenesis/osteogenesis-defective mice (the SAMP6 strain) were used as experimental models. In vivo application of RESV was performed at 100 mg/kg intraperitoneally once every other day for 2 months, and in vitro application of RESV was performed at 10 µM. Bone mass, bone formation rates and osteogenic differentiation of BMMSCs were primarily evaluated. Metabolic statuses of BMMSCs and the mitochondrial activity, transcription and morphology were also examined. Mitofilin expression was assessed at both mRNA and protein levels, and short hairpin RNA (shRNA)-based gene knockdown was applied for mechanistic experiments. Results: Chronic intermittent application of RESV enhances bone formation and counteracts accelerated bone loss, with RESV improving osteogenic differentiation of senescent BMMSCs. Furthermore, in rescuing osteogenic decline under BMMSC senescence, RESV restores cellular metabolism through mitochondrial functional recovery via facilitating mitochondrial autonomous gene transcription. Molecularly, in alleviating senescence-associated mitochondrial disorders of BMMSCs, particularly the mitochondrial morphological alterations, RESV upregulates Mitofilin, also known as inner membrane protein of mitochondria (Immt) or Mic60, which is the core component of the mitochondrial contact site and cristae organizing system (MICOS). Moreover, Mitofilin is revealed to be indispensable for mitochondrial homeostasis and osteogenesis of BMMSCs, and that insufficiency of Mitofilin leads to BMMSC senescence and bone loss. More importantly, Mitofilin mediates resveratrol-induced mitochondrial and osteogenic improvements of BMMSCs in senescence. Conclusion: Our findings uncover osteogenic functional improvements of senescent MSCs as critical impacts in anti-osteoporotic practice of RESV, and unravel Mitofilin as a novel mechanism mediating RESV promotion on mitochondrial function in stem cell senescence.

Value of Internal Carotid Artery Stenosis in the Differential Diagnosis between Invasive Pituitary Adenoma and Invasive Meningioma.

Objective To assess the value of internal carotid artery stenosis in differentiating invasive pituitary adenoma (IPA) from invasive meningiomas (IM). Methods The clinical and imaging data of 28 IPA patients and 15 IM patients who were treated in our center from January 2012 to December 2016 were retrospectively analyzed. The magnetic resonance imaging (MRI) features were analyzed. The narrowest diameter (Dstenosis) and area (Astenosis) of internal carotid artery around the tumor were measured by computed tomography angiography (CTA),followed by the calculation of the stenosis score (%stenosis). The diagnostic validity of the measured indicators were calculated by receiver operating characteristic (ROC) curve. Results The median Ki-67 was 3% (2%-5%) in IPA group,which was significantly higher than that in IM group (1%,1%-2%) (Z=-3.983,P=0.000). The tumor texture showed significant differences between these two groups (P=0.001). While there was no significant difference in the average diameter [(39.63±13.15)mm in IPA group vs. (37.09±16.13)mm in IM group (t=0.518,P=0.607)],the shape (P=0.010),T1WI (P=0.001),signal (P=0.000),post-gadolinium enhancement (P=0.000),separation from normal pituitary (P=0.001),dural tail sign (P=0.000),and skull (P=0.001) showed significant differences. ROC analysis showed that the AUC of Dstenosis was 0.725 (P=0.006),the cut-off was 3.45 mm,the sensitivity was 62.50%,and the specificity was 76.47%;the AUC of Astenosis was 0.737 (P=0.003),the cut-off level was 11.00 mm2,the sensitivity was 75.00%,and the specificity was 64.71%;finally,the AUC of %stenosis was 0.711 (P=0.013),the cut-off level was 0.306,the sensitivity was 43.75%,and the specificity was 97.06%. Conclusions In addition to the common imaging features,the internal carotid artery stenosis is a valuable tool for differentiating IPA from IM. Three indicators including Dstenosis,Astenosis,and %stenosis have moderate diagnostic validity.

Atomic-Level-Designed Catalytically Active Palladium Atoms on Ultrathin Gold Nanowires.

A Ag monolayer facilitates the deposition of isolated Pd atoms rather than continuous ones on ultrathin Au nanowires. During the hydrogenation of nitrophenol and the electrooxidation of ethanol, these two groups of Pd atoms show distinctive but geometry-dependent catalytic activity. This new atomic geometry maneuvering strategy is ready for the atomically precise design of nanocatalysts.

Transnasal Endoscopic Biopsy Approach to Atlas Tumor with X-ray Assisted and Related Radiographic Measure.

OBJECTIVE: To develop an endoscopic transnasal approach to atlas tumors and study its practicability. METHODS: This article comprises two components: an illustrative case report and observational data on 50 volunteers. As to the case report, a 34 year old man presented with occipital pain for more than 3 months and underwent systematic investigation in Qilu Hospital of Shandong University. CT and MRI scans showed bony destruction in the craniovertebral junction (CVJ) suggestive of tumor. Via an endoscopic transnasal approach to the suspected atlas tumor through the inferior nasal meatus, a Gallini biopsy needle was used to obtain tissue for examination. The procedure was performed endoscopically with double orientation X-ray guidance and coaxial technology after establishing the shortest distance for the biopsy track and range of target tissue and was assisted by manual palpation. As to the observational data, 50 volunteers underwent atlas-related morphometric image measurement using gemstone CT equipment. Biopsy track angles, range for biopsy of the atlas and biopsy track distances were measured by a blinded operator on CT images. CASE REPORT: pathological examination of the biopsy resulted in diagnosis of a chordoma. There were no complications such as bleeding, infection or spinal cord injury. One month later, the patient underwent tumor resection and reconstruction in other hospital and the diagnosis of chordoma was confirmed by pathological examination of the resected specimen. Observational data: measurements obtained from CT scans of the 50 volunteers were as follows. Biopsy track angles: mean leaning inside angle 3.53° ± 0.39° and mean posterior slope angle 13.05° ± 1.39°. Range for atlas biopsy: transverse diameter 11.84 ± 1.24 mm and longitudinal diameter 9.67 ± 0.90 mm. Biopsy track distances: from atlas to nostril, and to anterior and posterior edges of the inferior turbinate mucosa were 94.52 ± 5.03 mm, 78.21 ± 4.63 mm, and 33.51 ± 3.13 mm, respectively. CONCLUSIONS: An endoscopic transnasal approach enables biopsy and diagnosis of tumors in the anterior arch of the atlas. Relevant measurements were obtained by assessing CT scans of 50 volunteers to assist operators to determine the effective and safe range for transnasal atlas biopsy.

Fabrication of highly-specific SERS substrates by co-precipitation of functional nanomaterials during the self-sedimentation of silver nanowires into a nanoporous film.

In this report, we propose and demonstrate the fabrication of a highly-specific SERS substrate, which was achieved by the co-precipitation of functional materials, such as nanosorbents and nanocatalysts, into Ag nanoporous films. Based on the nanostructures developed, we performed the ultrasensitive detection of arsenic ions by SERS and monitored the catalyzed reactions using real-time SERS.

[Manipulative reduction with minimally invasive percutaneous plate osteosynthesis for 60 patients with distal tibiofibular fractures].

OBJECTIVE: To explore clinical effects of manipulative reduction with minimally invasive percutaneous plate osteosynthesis in treating distal tibiofibular fractures. METHODS: From 2009 to 2011, 60 patients with distal tibiofibular fractures were treated by manipulative reduction with minimally invasive percutaneous plate osteosynthesis. Among them, there were 32 males and 28 females aged from 14 to 70 years old with an average of 41.22 +/- 2.06. According to AO classification of fractures,5 cases were type A1, 22 cases were type A2,21 cases were type A3 and 12 cases were type C1. Operation time, blood loss,time of callus and fracture healing were observed, Mazur scoring of ankle joint were used to evaluate therapeutic. RESULTS: Fifty-eight incisions were healed at stage I ,and 2 cases were infected at distal tibial. Operation time was with an average of (62.34 +/- 5.66) min ranged 45 to 90 min;blood loss was 30 to 150 ml with an average of (80.57 +/- 5.59) ml;formation of callus appeared from 4 to 12 weeks,with an average of (8.24 +/- 2.06) weeks, and fracture healing time was from 3 to 6 months, with an average of (4.50 +/- 1.13) months. According to Mazur scoring of ankle joint 40 cases got excellent results, 18 good, and 2 fair. CONCLUSION: Manipulative reduction with minimally invasive percutaneous plate osteosynthesis can obtain reliable fixation. It is a good choice of treating distal tibiofibular fractures by protecting blood supply of fractures.