Publications by authors named "Li-Xiang Mei"

Two new guaiane-type sesquiterpenes, wenyujinolides A () and B (), were isolated from the ethanol extract of , together with 10 known compounds. Their structures were established by extensive spectroscopic methods (IR, ESIMS, HRESIMS, ECD, 1D and 2D NMR) and comparison of their NMR data with literatures. Compounds and were evaluated for the inhibition of NO production in LPS induced RAW 264.

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Background: Nil by mouth is considered the standard of care during the first days following esophagectomy. However, with the routine implementation of enhanced recovery after surgery, early oral intake is more likely to be the preferred mode of nutrition following esophagectomy. The present study aims to evaluate the safety and effectiveness of early oral intake following esophagectomy for esophageal cancer.

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Background: Esophagectomy and definitive chemoradiotherapy are commonly used in the treatment of stage I esophageal cancer (EC). The present study aims to compare the efficacy and safety of esophagectomy and definitive chemoradiotherapy as the initial treatment for clinical stage I EC.

Methods: This study was registered with the International Prospective Register of Systematic Reviews (CRD42020197203).

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Article Synopsis
  • The research focuses on a type of gall wasp (Cynipidae) that affects chestnut trees, leading to significant agricultural losses due to fungal infections that can cause tree damage and wasp mortality.
  • Using high-throughput sequencing, the study analyzed the ribosomal RNA of fungi found in gall wasps, their galls, and the galled twigs, comparing fungal species diversity and community structure among these groups.
  • Results indicate that gall wasps share many fungal species with their galls and the galled twigs, suggesting they could act as vectors for plant pathogens, facilitating fungal transmission between chestnut trees.
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Feeding jejunostomy (FJ) is a routine procedure at the time of esophagectomy in some centers. With the widespread popularization of enhanced recovery after surgery, the necessity of FJ has been increasingly questioned. This study aims to analyze the differences in safety and effectiveness between with (FJ group) or without (no-FJ group) performing FJ at the time of esophagectomy.

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Background: Postoperative nutritional therapy is of paramount importance for patients undergoing esophagectomy. The jejunostomy and nasoenteral tube are the popular routes for nutritional therapy. However, which one is the preferred route is unclear.

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Introduction: To systematically evaluate the safety and advantages of subxiphoid approach video-assisted thoracic surgery (SA-VATS) compared with intercostal approach video-assisted thoracic surgery (IA-VATS) for lung resection, we conducted a meta-analysis of the current literature.

Material And Methods: The literature search was conducted in PubMed, Web of Science, Cochrane Library, Embase, and China National Knowledge Infrastructure. RevMan 5.

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Long noncoding RNAs (lncRNAs) are transcripts longer than 200 nucleotides. Some lncRNAs are related to acute myocardial infarction (AMI) and can serve as blood-based biomarkers for AMI detection. To identify whether new lncRNAs participate in AMI, the expression of lncRNAs and mRNAs was analysed by microarray analysis (Agilent human array) with the limma package in R in two series: five paired peripheral blood mononuclear cell (PBMC) samples and four paired plasma samples from different AMI patients.

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Article Synopsis
  • Two new iboga-type indole alkaloids were identified from the twigs and leaves of the Tabernaemontana divaricata plant.
  • The newly discovered compounds are (3R)-7,19-di-epi-3-methoxytabernoxidine and (3R,19R)-19-hydroxy-3-(2-oxopropyl)voacangine.
  • Their structural identities were confirmed through various scientific methods, including spectroscopic techniques, X-ray diffraction, and circular dichroism analysis.
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Objective: Overweight and obesity have been shown to be related to multiple chronic conditions, leading to a heavy economic burden on society throughout the world. This study aims to estimate the prevalence of overweight and obesity and determine potential influencing factors among adults in Xinjiang, northwest China.

Design: A community-based observational study.

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Two hitherto unknown highly modified abietane diterpenoids, namely salviapritin A () and salviapritin B (), were isolated from the ethanol extract of , together with 17 known compounds. Their chemical structures were established by extensive spectroscopic methods (ESIMS, HRESIMS, 1D and 2D NMR) and by comparison of their NMR data with those of related analogues. Salviapritin A is the first example of a trinorabietane diterpenoid possessing an acenaphthylene skeleton from the genus.

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Long non-coding RNAs (lncRNAs) are transcripts longer than 200 nt that are involved in cardiovascular diseases (CVDs). To determine whether lncRNAs are involved in stable angina pectoris (SAP), we analysed the expression profile of lncRNAs and mRNAs on a genome-wide scale in SAP of Uyghur population. Five pairs of SAP patients and healthy controls were screened by an Agilent microarray (human lncRNA + mRNA Array V4.

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Four hitherto unknown aristolane-type sesquiterpenes, including one novel 8,9-secoaristolane, namely secoaristolenedioic acid (1), two aristolone derivatives, namely 1α,2β-dihydroxyaristolone (2), 9-epidebilon (3), and one rare aristolane-chalcone hybrid, namely 3'-hydroxynardoaristolone A (4) were isolated from the ethanol extract of the roots and rhizomes of Nardostachys chinensis. Their structures were elucidated on the basis of extensive spectroscopic analysis. In addition, the structure of aristolanhydride, recently isolated from the same species, was corrected by reanalysis of the published NMR data.

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Six hitherto unknown prenylated 2-phenoxychromones, epimedonin G (1), 7-O-methylepimedonin G (2), and epimedonins H-K (3-6), and two new prenylflavonoids, epimedonin L (7) and 3″-O-desmethylspinorhamnoside (8), were isolated from an ethanol extract of the aerial parts of Epimedium brevicornum. Their structures were established on the basis of spectroscopic data interpretation. Compound 7 exhibited cytotoxic activity when evaluated against four human cancer cell lines (HL-60, A-549, MCF-7, and SW-480), with IC values of <10 μM.

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Article Synopsis
  • Four new isoflavonoids were discovered from different plant sources: three isoflavans and one prenylated isoflavone.
  • Their chemical structures were determined using detailed spectroscopic methods.
  • Compounds 1 and 4 showed minimal cytotoxic effects against five types of human cancer cells.
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Four hitherto unknown prenylated coumarins, namely 6″-O-β-D-apiofuranosylapterin (1), 4'-O-isobutyroylpeguangxienin (2), 6-(3-methyl-2-oxobutyroyl)-7-methoxycoumarin (3), and 6-hydroxycoumurrayin (4), were isolated from the ethanol extract of Heracleum stenopterum, Peucedanum praeruptorum, Clausena lansium, and Murraya paniculata, respectively. Their chemical structures were established on the basis of extensive spectroscopic analysis. Compound 2 exhibited in vitro cytotoxic activity against five human cancer cell lines (HL-60, A-549, SMMC-7721, MCF-7, and SW-480) with IC values ranging from 15.

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  • Four new prenylated isoflavonoids, named derrisisoflavones H-K (1-4), and a new isoflavan, 6-hydroxyisosativan (5), were isolated from Derris robusta.
  • Their structures were determined using detailed spectroscopic techniques.
  • Derrisisoflavones J (3) and K (4) represent the first known examples of hydroxyethylated isoflavonoids.
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Four hitherto unknown 6a,11b-dihydroxypterocarpans, namely pterocarpadiols A-D (1-4), were isolated from the ethanol extract of the twigs and leaves of Derris robusta. Their structures were elucidated on the basis of extensive spectroscopic analysis. Pterocarpadiols A-D are a kind of very rare 6a,11b-dihydroxypterocarpans, and their presence as markers may be helpful in chemotaxonomical classification.

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  • The study aimed to analyze the molecular features of MRSA strains from children in seven Chinese cities, focusing on type and prevalence of different strains.
  • A total of 134 MRSA isolates were examined using PCR techniques, revealing various sequence types and SCCmec types, with CC59 and SCCmec type IV being the most common.
  • Results indicated that most MRSA cases were linked to pneumonia and skin infections, with significant variation in prevalent clones across different regions, particularly emphasizing the dominance of the ST59-MRSA-IVa(t437) in many areas.
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Two new ent-kaurane diterpene derivatives, sculponeatins N (1) and O (2), and a new A-ring contracted oleanane triterpenoid, sculponeatic acid (5), were isolated from the plant Isodon sculponeata. Their structures were elucidated on the basis of extensive spectroscopic analysis. This is the first report of natural occurrence of an A-ring contracted oleanane triterpenoid.

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  • Three new compounds were identified from the roots of Ilex pubescens: ilexisochromane (1), ilex acid A (2), and ilex acid B (3).
  • Their chemical structures were determined through advanced techniques including one-dimensional and two-dimensional nuclear magnetic resonance (NMR) and mass spectrometry.
  • This research adds to the understanding of the compounds found in Ilex pubescens, which may have potential applications in various fields.
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  • The study assesses the impact of socio-economic development on the ecological environment in Wuhan, China, from 2006 to 2020, highlighting significant environmental degradation due to human activities.
  • A support vector machine (SVM) model was developed to simulate interactions between socio-economic factors and urban ecological footprints, utilizing historical data to predict future ecological impacts.
  • Results showed a dramatic increase in the total ecological footprint, expected to exceed 28 million global hectares by 2020, indicating that economic growth does not directly correlate with improved environmental conditions.
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