Identification and verification of a prognostic ferroptosis-related lncRNAs signature for patients with lung adenocarcinoma.

Lung cancer has been identified as one of the deadliest malignant tumors worldwide. Mounting evidence suggests that ferroptosis is a well-known non-apoptotic cell death process that participates in pathological mechanisms and is a new cancer treatment strategy. Aberrantly expressed long non-coding RNAs (lncRNAs) that drive lung cancer progression have attracted increasing attention. Herein, we explored the prognostic significance of ferroptosis-related lncRNAs in lung cancer patients. LUAD gene expression patterns and clinicopathological data were downloaded from The Cancer Genome Atlas (TCGA) database. Based on LASSO-Cox regression, A 14 ferroptosis-related differentially expressed lncRNAs (FRDELs) signature was constructed. Subsequently, a nomogram model for predicting the prognosis of LUAD patients was constructed based on clinicopathological data and the 14 - FRDELs signature. The signature was shown to be correlated with tumor mutational burden (TMB) and immune cell infiltration within the tumor microenvironment. Furthermore, Gene Set Enrichment Analysis (GSEA) confirmed that the signature was correlated with LUAD-related biological functions such as the P53 signaling pathway, DNA replication, and cell cycle. The roles and mechanisms of PACERR in the signature were explored by si-lncRNA-mediated knockdown and transfection-mediated overexpression via in vitro experiments in A549 and H1299 cells. PACERR was significantly upregulated in A549 and H1299 cells, and higher expression promoted LUAD cell proliferation, migration, and invasion via in vitro experiments, while knockdown of PACERR presented the opposite effects. In conclusion, our study provided information regarding ferroptosis-related lncRNA expression and established a prognostic nomogram based on 14 FRDELs to predict overall survival in LUAD accurately. Additionally, our results in vitro revealed that PACERR played an oncogenic role in LUAD proliferation and metastasis, which provides mechanistic insights into the roles of ferroptosis-related lncRNA in LUAD progression and that it may be a potential biomarker for LUAD treatment.

Rejuvenation of plasticity via deformation graining in magnesium.

Magnesium, the lightest structural metal, usually exhibits limited ambient plasticity when compressed along its crystallographic c-axis (the "hard" orientation of magnesium). Here we report large plasticity in c-axis compression of submicron magnesium single crystal achieved by a dual-stage deformation. We show that when the plastic flow gradually strain-hardens the magnesium crystal to gigapascal level, at which point dislocation mediated plasticity is nearly exhausted, the sample instantly pancakes without fracture, accompanying a conversion of the initial single crystal into multiple grains that roughly share a common rotation axis. Atomic-scale characterization, crystallographic analyses and molecular dynamics simulations indicate that the new grains can form via transformation of pyramidal to basal planes. We categorize this grain formation as "deformation graining". The formation of new grains rejuvenates massive dislocation slip and deformation twinning to enable large plastic strains.

Meta-analysis of the effects of drug-coated balloons among patients with small-vessel coronary artery disease.

OBJECTIVE: This study evaluated the clinical value of drug-coated balloons for patients with small-vessel coronary artery disease (SVD). METHODS: A computerized literature search was performed using the databases to conduct a meta-analysis and evaluate the clinical value of drug-coated balloons among patients with SVD. RESULTS: This review enrolling 1545 patients receiving drug-coated balloons and 1010 patients receiving stents (including drug-eluting stents and bare-metal stents). The meta-analysis results showed that the incidence of major adverse cardiovascular events among patients with SVD did not significantly differ between the drug-coated balloon group and the stent group within 1 postoperative year (odds ratio = 0.81, P = .5). A subgroup analysis showed that the incidence of myocardial infarction among the drug-coated balloon group was significantly lower than that among the stent group (odds ratio = 0.58, P = .04). Nevertheless, the late lumen loss of the drug-coated balloon group was significantly lower than that of the stent group (mean difference = 0.31, P = .01). CONCLUSIONS: Drug-coated balloons can be used to effectively reduce the incidence of myocardial infarction in patients with SVD within 1 year and decrease the extent of late lumen loss without increasing the incidence of major adverse cardiovascular events.

[Investigation of Soil-Transmitted Nematode Infections in Xuchang City of Henan Province in 2012].

The Weidu District, Yanling County and Yuzhou City were selected in Xuchang City for investigation of the status of soil-transmitted nematode infections in 2012, in accordance with the National Monitoring Program for Soil-Transmitted Nematodiasis (2011 Revised Edition). Kato-Katz technique was used to detect soil- transmitted nematodes in feces of residents over 3 years old, and the cellophane tape peri-anal swab method was used to detect pinworm eggs in children between 3-12 years. A total of 2 991 fecal samples were examined. The total infection rate of soil-transmitted nematodiasis was 4.3%(128/2 991), decreased by 63.0% and 55.1% when compared with that in 2010 (11.6%) and that in Henan Province in 2004 (9.5%) respectively. The infection rates of roundworms, whipworms, hookworms and pinworms were 3.7%(110/2 991), 0.3%(9/2 991) , 0.1%(3/2 991) , and 0.2% ( 6/2 991) , respectively, all showing mild intensity of infection. The infection rate of soil-transmitted nematodiasis was highest in farmers (5.5%, 113/2 059), followed by children (3.1%, 3/98).

Simultaneous analysis of multiple endogenous plant hormones in leaf tissue of oilseed rape by solid-phase extraction coupled with high-performance liquid chromatography-electrospray ionisation tandem mass spectrometry.

INTRODUCTION: Plant hormones are important signalling molecules that act at lower concentrations to regulate numerous plant physiological and developmental processes. In order to study the functions of plant hormones, it is necessary to develop a high-throughput and highly selective and sensitive method for determination of plant hormones. OBJECTIVE: Based on SPE-HPLC-ESI-MS/MS method, a highly selective and sensitive method for determination of six plant hormones in leaf tissue of oilseed rape was developed. METHODOLOGY: The extraction was performed with C18 solid-phase extraction cartridge and the sample was subsequently analysed by HPLC-ESI-MS/MS. Methanol and H2O with 0.05% formic acid was selected as the mobile phase for HPLC, using a gradient of increasing methanol content. The plant hormones were quantified in MRM mode and identified in IDA mode by the hybrid triple quadrupole/linear ion trap mass spectrometer with high sensitivity and selectivity. RESULTS: Under the optimal conditions, good linearities were obtained for six plant hormones with the correlation coefficients above 0.9924. The detection limits of the target compounds were in the range of 0.005-0.2 ng/mL. Reproducibility of the method was obtained with intra-day and inter-day relative standard deviations. The extraction recovery yields of plant hormones under SPE conditions ranged from 67.03 to 119.83%. Compared with previous methods, sample preparation time and amount of sample required for analysis of plant hormones were reduced, and more classes of hormones were quantitatively measured.

[Video-assisted thoracoscopic radical resection of early-stage non-small cell lung cancer].

OBJECTIVE: To study the reliability and feasibility of video-assisted thoracoscopic surgery (VATS) for radical resection of early-stage non-small cell lung cancer (NSCLC). METHODS: Fifty-four patients with NSCLC treated between Jan. 2007 and Jun. 2010 at our institution were divided into VATS group (n=23) and video-assisted mini thoracotomy (VAMT) group (n=31). The operative time, intraoperative blood loss, number of dissected nodes, pleural effusion drainage, postoperative hospital stay, and visual analogue scales (VAS) were compared between the two groups. RESULTS: No deaths or serious complications occurred perioperatively in the two groups. The operative time, intraoperative blood loss, number of dissected lymph nodes or pleural effusion drainage were all comparable between the two groups, but compared with VAMT, VATS was associated with significantly shortened postoperative hospital stay (10.54±1.21 days vs 7.92±0.86 days, P<0.05) and lowered VAS scores (4.26±1.28 vs 2.37±0.25, P<0.05). CONCLUSION: VATS for pulmonary lobe resection with systematic node dissection is a feasible approach to the management of early-stage NSCLC.

[Identification, characterization and utilization of simple sequence repeat markers derived from Salvia miltiorrhiza expressed sequence tags].

Despite Salvia miltiorrhiza being one of the most important medicine plants in China, there is a limited availability of genomic resources, especially of the expressed sequence tag-based markers. In this study, we selected and characterized functional markers in S. miltiorrhiza, which consisted of 4,192 non-redundant expressed sequence tags (ESTs) from 10,288 identified S. miltiorrhiza ESTs in dbEST data bank. Among them, 159 simple sequence repeats (SSR) were detected, which amounted to 3.79% of the non-redundant starting sequence population. This incidence was equivalent to one EST-SSR in every 12.74 kb of S. miltiorrhiza ESTs. Among the different motifs ranging from 1 bp to 6 bp, di-nucleotide repeat motif was the most abundant (77, 48.43%), followed by tri-nucleotide (41, 25.79%), hexa-nucleotide (23, 14.47%), penta-nucleotide (12, 7.55%) and tetra-nucleotide (6, 3.77%). In 47 identified motif types, the detected frequency above 5% were GA/CT (16.35%), AG/TC (15.09%), TCA/AGT (10.69%), AT/TA (6.29%), GAAAAG/CAAAAC (6.29%) and TA/AT (5.03%). Based on flank sequence of detected SSR, a total of 83 EST-SSR primer pairs were designed and tested for the amplification efficiency, polymorphism and transferability in thirteen S. mihiorrhiza samples and other ten species from the genus Salvia. The results showed that 72 primer pairs were successfully amplified in S. miltiorrhiza samples to yield and 279 loci with an average of 3.88 loci per primer pair. The cross-transferability of S. miltiorrhiza EST-SSR markers to other ten Salvia plants was very high, ranging from 60% to 100% with an average of 85%. Further analysis of the genetic similarity based on the polymorphic bands showed the EST-SSR could detect the genetic diversity on different levels among the whole test samples and distinguish the S. miltiorrhiza from other Salvia plants effectively. It is expected that the potential markers described here would add to the repertoire of DNA markers needed for genetic analysis, linkage mapping and comparative genomics studies in S. miltiorrhiza and related Salvia genus plants.