The necroptosis signature and molecular mechanism of lung squamous cell carcinoma.

Background: Given the poor prognosis of lung squamous cell carcinoma (LUSC), the aim of this study was to screen for new prognostic biomarkers.

Methods: The TGCA_LUSC dataset was used as the training set, and GSE73403 was used as the validation set. The genes involved in necroptosis-related pathways were acquired from the KEGG database, and the differential genes between the LUSC and normal samples were identified using the GSEA.

Case Report: A rare case of non-small cell lung cancer with STRN-ALK fusion in a patient in very poor condition treated with first-line ensartinib.

Several cases of STRN-ALK fusion have been reported, and some anaplastic lymphoma kinase (ALK) inhibitors have been shown to be effective for treatment. Nevertheless, no cases of COVID-19 leading to heart failure and respiratory failure have been reported in people older than 70 years treated with ALK inhibitors. The present case report describes a 70-year-old patient with usual chronic obstructive pulmonary disease, diabetes, depression, and carotid plaque disease.

SKA1/2/3 is a biomarker of poor prognosis in human hepatocellular carcinoma.

Background: Spindle and kinetochore-associated complex subunits 1-3 (SKA1-3) stabilize the kinetochore-attached spindle microtubules in metaphase. Due to the dysregulation in multiple cancers, SKA1-3 is considered a predictor for the prognosis of the patients. However, the potential clinical applications of SKA1-3, particularly in hepatocellular carcinoma (HCC) prognosis and progression, have completely unknown yet.

[Big Data Management and Application: Specialty Construction Overview and Exploration of Personnel Training System in Medical Schools].

Focusing on the undergraduate specialty construction of big data management and application in medical colleges and universities in the context of New Medical Education, we first analyzed, in this paper, the demand for trained personnel of this specialization and the status of program construction at the national and regional levels. Then, taking Anhui Medical University as an example, a key medical university in Anhui Province, we introduced the preparations made by medical colleges and universities to set up big data management and application specialty. Finally, from the perspectives of the objectives of personnel training, curriculum system, and practical teaching system, we presented in detail the exploratory efforts made by Anhui Medical University to construct a training system for personnel specializing in big data management and application.

[A new phloroglucinol from Dryopteris fragrans and its antibacterial activity in vitro].

A new phloroglucinol was isolated from 50% ethanol extract of Dryopteris fragrans by silica gel column chromatography, Sephadex LH-20 gel column chromatography, thin-layer chromatography(TLC), and preparative liquid column chromatography. On the basis of MS, ~1H-NMR, ~(13)C-NMR, and reference materials, compound 1 was identified as 2,5-cyclohexadien-1-one, 2-{[2,6-dihydroxy-4-methoxy-3-methyl-5-(1-isobutyl)phenyl]methyl}-3,5-dihydroxy-4,4-dimethyl-6-(1-oxobutyl)(1), and named disaspidin BB. Compound 1 was evaluated for its antibacterial activity.

Two effective clinical prediction models to screen for obstructive sleep apnoea based on body mass index and other parameters.

Background And Objective: The diagnosis of obstructive sleep apnea (OSA) relies on polysomnography which is time-consuming and expensive. We therefore aimed to develop two simple, non-invasive models to screen adults for OSA.

Methods: The effectiveness of using body mass index (BMI) and a new visual prediction model to screen for OSA was evaluated using a development set (1769 participants) and confirmed using an independent validation set (642 participants).

Involvement of dopamine signaling pathway in neurodevelopmental toxicity induced by isoniazid in zebrafish.

Aims: This study evaluated the neurodevelopmental toxicity of isoniazid (INH) in zebrafish embryos and the underlying mechanism.

Methods: Zebrafish embryos were exposed to different concentrations (2 mM, 4 mM, 8 mM, 16 mM, 32 mM) INH for 120 hpf. During the exposure period, the percentage of embryo/larva mortality, hatching, and morphological malformation were checked every 24 h until 120 hpf.

Hydrogen-rich saline ameliorates hippocampal neuron apoptosis through up-regulating the expression of cystathionine β-synthase (CBS) after cerebral ischemia- reperfusion in rats.

Objectives: This study aimed to evaluate the potential role of hydrogen in rats after cerebral ischemic/reperfusion (I/R) injury.

Materials And Methods: The experimental samples were composed of sham group, model group of rats that received middle cerebral artery occlusion (MCAO) for 2 hr followed by reperfusion for 24 hr, and the hydrogen saline group treated by hydro¬gen-rich saline (1 ml/kg) after MCAO. Hydrogen sulfide (H2S), S100-βprotein (S100-β), and neuron-specific enolase (NSE) levels were measured; the levels of malondialdehyde (MDA), reactive oxygen species (ROS), and superoxide dismutase (SOD) were detected; the histologic structure and apoptotic cells of hippocampus were observed; the expressions of cystathionine β-synthase (CBS), nuclear factor erythroid 2-related factor 2 (Nrf2), and hemeoxygenase-1 (HO-1) were measured.

An infant with a mild SARS-CoV-2 infection detected only by anal swabs: a case report.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan, China and has spread rapidly worldwide. We present a mild SARS-CoV-2 infection in a baby with non-productive cough and normal chest computed tomography, in whom only anal swabs tested positive by real-time PCR testing for SARS-CoV-2. She was given atomization inhalation therapy with recombinant human interferon alfa-1b for 10 days.

Novel PDE5 inhibitors derived from rutaecarpine for the treatment of Alzheimer's disease.

A series of novel rutaecarpine derivatives were synthesized and subjected to pharmacological evaluation as PDE5 inhibitors. The structure-activity relationships were discussed and their binding conformation and simultaneous interaction mode were further clarified by the molecular docking studies. Among the 25 analogues, compound 8i exhibited most potent PDE5 inhibition with IC values about 0.

Radiofrequency ablation for lung squamous cell carcinoma in a single-lung patient: A case report and literature review.

Rationale: High morbidity and high mortality are the main features of non-small cell lung cancer (NSCLC). Radiofrequency ablation, which produces a large amount of heat to kill tumor cells, is one effective way to treat this disease.

Patient Concerns: We report the case of a 74-year-old man who presented with a 1-month history of right chest pain.

Design, synthesis of novel purin-6-one derivatives as phosphodiesterase 2 (PDE2) inhibitors: The neuroprotective and anxiolytic-like effects.

Phosphodiesterase 2 (PDE2) has received much attention for the potential treatment of the central nervous system (CNS) disorders. Herein, based on the existing PDE2 inhibitors and their binding modes, a series of purin-6-one derivatives were designed, synthesized and evaluated for PDE2 inhibitory activities, which led to the discovery of the best compounds 6p and 6s with significant inhibitory potency (IC: 72 and 81 nM, respectively). Docking simulation was performed to insert compound 6s into the crystal structure of PDE2 at the active site to determine the binding mode.

Small cell lung cancer treated by radiofrequency ablation: A case report.

Rationale: The morbidity and mortality of small cell lung cancer (SCLC), an uncommon malignancy of the lung, remain high. Radiofrequency ablation (RFA) creates heat to destroy cancer cells and is usually used to treat non-SCLC, but not SCLC.

Patient Concerns: An 85-year-old male presented with a 2-month history of a productive cough with white phlegm and a 2-day history of hemoptysis.

From a binary salt to salt co-crystals of antibacterial agent lomefloxacin with improved solubility and bioavailability.

The cocrystallization of lomefloxacin (Lf) with barbituric acid (HBA) and/or isophthalic acid (H2ip) leads to novel binary and ternary salts via hydrogen-bonding recognition. X-ray single-crystal diffraction analyses show that zwitterionic lomefloxacin can adjust itself to fulfill a different supramolecular array in either binary salts or ternary salt co-crystals, formulated as [HLf]·[Hip]·H2O (1), [HLf]·[BA]·[HBA]·H2O (2) and [HLf]·[BA]·[H2ip]·CH3OH·H2O (3). These pharmaceutical agents present uniform charge-assisted hydrogen-bonding networks between HLf cations and acidic coformers with the lattice capturing water molecules.

Focusing on the structure and the function of Pin1: new insights into the opposite effects of fever on cancers and Alzheimer's disease.

A new molecular mechanism is proposed to explain the opposite effects of fever on cancers and Alzheimer's disease (AD). The proposal is based on the experimental discovery that the fever stress interferes the structure and the activity of Pin1, which plays uniquely opposite roles in the pathogenesis of cancers and AD. Pin1 is the only known cis-trans isomerase that specifically isomerizes the pSer/pThr-Pro motifs in proteins, facilitating kinds of signaling pathways.

Synthesis, biological evaluation, and molecular docking studies of N-((1,3-diphenyl-1H-pyrazol-4-yl)methyl)aniline derivatives as novel anticancer agents.

A series of N-((1,3-diphenyl-1H-pyrazol-4-yl)methyl)aniline derivatives (5a-8d) have been designed and synthesized, and their biological activities were also evaluated as potential antitumor and cyclin dependent kinase 2 (CDK2) inhibitors. Among all the compounds, compound 5a displayed the most potent CDK2/cyclin E inhibitory activity in vitro, with an IC(50) of 0.98 ± 0.

Ethyl (2E,4Z)-5-diethyl-amino-2-(phenyl-sulfon-yl)penta-2,4-dienoate.

In the title compound, C(17)H(23)NO(4)S, the penta-diene group adopts a planar conformation, with an r.m.s.

Inhibition of alpha-synuclein fibrillization by dopamine analogs via reaction with the amino groups of alpha-synuclein. Implication for dopaminergic neurodegeneration.

Fibrillization of alpha-synuclein (alpha-Syn) is closely associated with the formation of Lewy bodies in neurons and dopamine (DA) is a potent inhibitor for the process, which is implicated in the causative pathogenesis of Parkinson's disease (PD). To elucidate any molecular mechanism that may have biological relevance, we tested the inhibitory abilities of DA and several analogs including chemically synthetic and natural polyphenols in vitro. The MS and NMR characterizations strongly demonstrate that DA and its analogs inhibit alpha-Syn fibrillization by a mechanism where the oxidation products (quinones) of DA analogs react with the amino groups of alpha-Syn chain, generating alpha-Syn-quinone adducts.

Binding affinity difference induced by the stereochemistry of the sulfoxide bridge of the cyclic peptide inhibitors of Grb2-SH2 domain: NMR studies for the structural origin.

The SAR study on a phage library-derived non-phosphorylated cyclic peptide ligand of Grb2-SH2 domain indicates that the configuration of the cyclization linkage is crucial for assuming the active binding conformation. When the thioether linkage was oxidized to the two chiral sulfoxides, the R-configured sulfoxide-cyclized peptide displayed 10-30 times more potency than the corresponding S-configured one in binding affinity to the Grb2-SH2 domain. In this paper, the solution structures of such a pair of sulfoxide-bridged cyclic peptide diastereoisomers, i.

A new acetylenic ketone from the bark of Litsea rotundifolia var. oblongifolia.

A new acetylenic ketone isolated from the bark of Litsea rotundifolia var. oblongifolia has been characterized as 13-tetradecyn-2-one on the basis of detailed spectroscopic analysis and comparison with related model compounds. Four known related lipids have also been isolated from this plant.

[NMR study on solution configuration of mHCN1 pore peptide].

Spin systems for amino acid residues in mHCN1 pore region peptide have been identified through analysis of 2D NMR spectra. The sequence-specific assignment of spin systems was obtained by NOEs correlation in WET-NOESY spectra, and the complete assignment of proton resonances for backbone and side chain has been achieved. CNS software was used to calculate the structure of mHCN1 19 aa peptide.

Assignment of Proton Resonances and Conformational Characterization of Oligodeoxyribonucleic Acid d(CCGTACGG) in Solution.

Lycobetaine prepared from lycorine is a new anticancer agent. The experimental and quantum pharmacological studies revealed that lycobetaine can interact with DNA by intercalation, preferentially into GO base pairs. In order to provide detailed interaction model of lycobetaine-DNA, a self-complementary octanucleotide d(CCGTACGG) was designed and synthesized by using new HELP (high efficiency Liquid phase) According to its nature, the sample was prepared to the desired final concentration by adding salt and buffer solutions.