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Thirteen years to get from b to a:one of the neglected isoforms of IL-37 enters the stage

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Cellular & Molecular Immunology 2024年第2期21卷 201-202页

作者： steven X.Cho Ina Rudloff Andrew M.Ellisdon Claudia A.Nold-Petry Marcel f.Nold Ritchie Centre Hudson Institute of Medical ResearchMelbourneVICAustralia Department of Pediatrics Monash UniversityMelbourneVICAustralia Cancer Program Biomedicine Discovery InstituteMonash UniversityMelbourneVICAustralia Monash Newborn Monash Children’s HospitalMelbourneVICAustralia

Interleukin(IL)-37 is one of the few anti-inflammatory members of the predominantly pro-inflammatory IL-1 cytokine ***-37 possesses alarmin-like properties[1]and exerts its activities via intracellular[2]as well as cell surface receptor-dependent mechanisms,and the latter involves IL-1R8 and IL-18Rα[3].Because of its powerful and broad-spectrum“peacemaking”[4]functions,considerable efforts have been invested in developing IL-37-based anti-inflammatory therapeutics[5,6].

关键词： Interleukin neglected cytokine

Orientation Bias of Self-Assembled Alkanes and Their Derivatives Under Dynamic Lateral Nanoconfinement Conditions

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CCS Chemistry 2024年第4期6卷 1024-1033页

作者： Conditions Lihua Yu Yuanzhi Xia Tianze Hu Brent Daelemans steven De feyter Department of Chemistry Division of Molecular Imaging and PhotonicsKU LeuvenB-3001 Leuven

Self-assembled molecular networks(SAMNs)formed on crystalline solid substrates result from the spontaneous arrangement of individual molecules into structured *** interaction between molecules and the substrate leads to a nonrandom orientation of SAMNs with respect to the substrate’s *** the case of graphite,the sixfold rotational symmetry of the substrate results in an equivalent rotational degeneracy in the orientation of *** this study,we explored how nanoconfinement,that is,the restriction of SAMN formation to nanometersized areas,known as nanocorrals,could impact and potentially alleviate the orientational degeneracy of SAMNs,with emphasis on the influence of molecule symmetry,size,and intermolecular *** this end,we investigated the orientation distribution of n-alkanes and functionalized alkanes within nanocorrals,which were fabricated using scanning tunneling microscopy lithography(nanoshaving).We observed lifting of orientational degeneracy for long alkanes,contrary to shorter alkanes,which did not exhibit this orientation ***,functionalized alkanes with hydrogen bonding groups demonstrated preferential alignment regardless of length,highlighting the significance of stabilizing intermolecular interactions in the alignment *** study discussed the underlying principles of the molecular packing process and shed light on the complexity of molecular self-assembly in nanoconfined spaces.

关键词： self-assembly confinement condition nanocorral orientation bias scanning tunneling microscopy

A glycine-rich nuclear effector VdCE51 of Verticillium dahliae suppresses plant immune responses by inhibiting the accumulation of GhTRXH2

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The Crop Journal 2024年第4期12卷 1137-1149页

作者： Chi Li Yingqi Huang Wenjing Shang Jieyin Chen steven J.Klosterman Krishna V.Subbarao Jun Qin Xiaoping Hu State Key Laboratory of Crop Stress Resistance and High-Efficiency Production Key Laboratory of Plant Protection Resources and Pest Management of Ministry of EducationKey Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural AffairsCollege of Plant ProtectionNorthwest A&F UniversityYangling 712100ShaanxiChina State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Western Agricultural Research Center Chinese Academy of Agricultural SciencesChangji 831100XinjiangChina Agricultural Research Service United States Department of AgricultureSalinasCA 93905USA Department of Plant Pathology University of CaliforniaDavisc/o United States Agricultural Research StationSalinasCA 93905USA

Verticillium dahliae is an important soil-borne fungal pathogen that causes great yield losses in many cash *** of this fungus are known to regulate plant immunity but the mechanism much remains unclear.A glycine-rich nuclear effector,VdCE51,was able to suppress immune responses in tobacco against Botrytis cinerea and Sclerotinia *** effector was a required factor for full virulence of ***,and its nuclear localization was a requisite for suppressing plant *** thioredoxin GhTRXH2,identified as a positive regulator of plant immunity,was a host target of *** findings show a virulence regulating mechanism whereby the secreted nuclear effector VdCE51 interferes with the transcription of PR genes,and the SA signaling pathway by inhibiting the accumulation of GhTRXH2,thus suppressing plant immunity.

关键词： Verticillium dahliae Plant immunity Effector Thioredoxin

Discovery and evaluation of a novel 18f-labeled vasopressin 1a receptor PET ligand with peripheral binding specificity

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Acta Pharmaceutica Sinica B 2024年第9期14卷 4014-4027页

作者： Junqi Hu Yinlong Li Chenchen Dong Huiyi Wei Kai Liao Junjie Wei Chunyu Zhao Ahmad Chaudhary Jiahui Chen Hao Xu Ke Zhong steven HLiang Lu Wang Weijian Ye Center of Cyclotron and PET Radiopharmaceuticals Department of Nuclear Medicine&Key Laboratory of Basic and Translational Research on Radiopharmaceuticalsthe First Affiliated Hospital of Jinan UniversityGuangzhou 510630China Department of Radiology and Imaging Sciences Emory UniversityAtlant1GA 30322USA Department of Pharmacy Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China

The arginine-vasopressin(AVP)hormone plays a pivotal role in regulating various physiological processes,such as hormone secretion,cardiovascular modulation,and social *** studies have highlighted the V1a receptor as a promising therapeutic ***-depth insights into V1a receptor-related pathologies,attained through in vivo imaging and quantification in both peripheral organs and the central nervous system(CNS),could significantly advance the development of effective V1a *** address this need,we develop a novel V1a-targeted positron emission tomography(PET)ligand,[18f]V1A-2303([18f]8),which demonstrates favorable in vitro binding affinity and selectivity for the V1a *** tracer binding in peripheral tissues was also confirmed through rigorous cell uptake studies,autoradiography,biodistribution ***,[18f]8 was employed in PET imaging and arterial blood sampling studies in healthy rhesus monkeys to assess its brain permeability and specificity,whole-body distribution,and kinetic *** research indicated[18f]8 as a valuable tool for noninvasively studying V1a receptors in peripheral organs,and as a foundational element for the development of next-generation,brain-penetrant ligands specifically designed for the CNS.

关键词： Vasopressin Autism V1a receptor Positron emission tomography PET imaging Radiolabeling fluorine 18 Kinetic modeling

Safety and in Vivo Anti-Inflammatory Activity of Ethanolic Extract of ficus umbellata (Vahl.) Leaves

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Journal of Biosciences and Medicines 2024年第3期12卷 94-112页

作者： Atchadé Pascal Tchogou steven Amour Pyus Tanguy Vignon Chokki Gbèssohèlè Justin Behanzin Tétédé Rodrigue Christian Konfo Perside Savoeda félicienne Agbogba Léocardie Akpoli Lamine Baba-Moussa Maximin Senou Alphonse Sezan Experimental and Clinical Biology Unit (UBEC) Biotechnology Research Laboratory Medical and Pharmaceutical (LaRBiMeP) Na-tional School of Biosciences and Biotechnology of Dassa-Zoumé (ENSBBA) National University of Science Technology and Engi-neering of Abomey (UNSTIM) Dassa-Zoumé Benin Laboratory of Pharmacology and Improved Traditional Medicines (LPMTA) Faculty of Science and Technology (FAST) University of Abomey-Calavi (UAC) Abomey-Calavi Benin National University of Agriculture (UNA) Schools of Science and Techniques for Preservation and Processing of Agricultural Prod-ucts (ESTCTPA) Sakété Benin Laboratory of Biology and Molecular Typing in Microbiology Department of Biochemistry and Cell Biology Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin

Toxicity is the totality of adverse effects, which can be functional and morphological lesions in a living organism, caused by a substance introduced in relatively high single doses or in small, repeated doses. The aim of this study was to assess the OECD-recommended acute oral toxicity and anti-inflammatory activity of ethanolic extract of ficus umbellata leaves. Animals were given a single oral dose of 1000, 3000 and 5000 mg/Kg body weight (BW) of the extract. for the anti-inflammatory activity test, rats were given the ethanolic extract of f. umbellata leaves at doses of 100, 300 and 500 mg/Kg or aspirin® at a concentration of 100 mg/Kg PC orally, one hour before injection of 0.05 ml of 1% formalin under the plantar fascia of the rat’s right hind paw. Paw volume measurements were taken one, two and three hours after formalin injection, using an electronic caliper. After 14 days of observation, no deaths were observed in treated rats. The LD50 of ethanolic extract of ficus umbellata leaf powder is greater than 5000 mg/Kg body weight. This extract has no significant effects on hematological parameters and on the main markers of nephrotoxicity and hepatotoxicity for a single dose of less than 5000 mg/Kg PC. It reduces formalin-induced edema. Evaluation of the percentage inhibition showed that the extract had greater anti-inflammatory activity at 3 hours after the start of the experiment. However, better inhibition of inflammatory oedema of the paw of rats treated with 500 mg/Kg was observed at 5 hours after the start of the experiment, with a percentage inhibition of 69.23 ± 1.02, compared with the reference group treated with aspirin® 100 mg/Kg, which showed an inhibition of 63.50 ± 0.98. These results show that f. umbellata leaves possess anti-inflammatory activity, which would justify their use in traditional African medicine to prevent or treat inflammation.

关键词： ficus umbellata Toxicity Anti-Inflammatory Edema Inflammation

Proteasome inhibition-induces endoplasmic reticulum dysfunction and cell death of human cholangiocarcinoma cells

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World Journal of Gastroenterology 2007年第6期13卷 851-857页

作者： Yucel Ustundag steven f Bronk Gregory J Gores Mayo Clinic College of Medicine Rochester MN 55905 United States

AIM: To determine if proteasome inhibition induces apoptosis in human cholangiocarcinoma cells, and if so, to elucidate the cellular mechanisms. METHODS: Studies were performed in the human KMCH, KMBC, and Mz-ChA-1 cholangiocarcinoma, and normal rat cell lines. MG132, a peptide aldehyde, which inhibits the chymotrypsin-like activity of the proteaosome was employed for this study. Apoptosis was assessed morphologically by 4'-6-Diamidino-2-phenylindole (DAPI) nuclear staining and fluorescence microscopy. Mitochondrial membrane potential was examined using a fluorescent unquenching assay. Ultrastructural changes during cell death were examined using transmission electron microscopy (TEM). Caspase 3/7 activity was assessed using an enzymatic-based fluorescent assay. Cytosolic-free calcium concentrations were measured using fura-2 and digitized fluorescent microscopy. RESULTS: MG132, a proteasome inhibitor, induced apoptosis in all the cholangiocarcinoma cell lines examined. In contrast, minimal cytotoxicity was observed in normal rat cholangiocytes. Apoptosis was time-and -concentration-dependent. There was no change in the mitochondrial membrane potential between treated and untreated cells. Ultrastructural examination by transmission electron microscopy displayed the classic features of apoptosis, but in addition, there was also dramatic vacuolization of the endoplasmic reticulum (ER). Unexpectedly, no increase in caspase 3/7 activity was observed in MG132 treated cells, nor did the pancaspase inhibitor, Q-VD-OPh prevent cell death. The protein synthesis inhibitor, cycloheximide, blocked apoptosis induced by proteosome inhibitor indicating that ER dysfunction was dependent upon the formation of new proteins. CONCLUSION: Proteosome inhibition induces ERdysfunction and caspase-independent cell death selectively in human cholangiocarcinoma cells. Proteasome inhibitors warrant evaluation as anticancer agents for the treatment of human cholangiocarcinoma.

关键词： MG132 Cholangiocarcinoma Proteosome Apoptosis Calcium

Common-path interferometric label-free protein sensing with resonant dielectric nanostructures

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Light(Science & Applications) 2020年第1期9卷 1086-1094页

作者： Isabel Barth Donato Conteduca Christopher Reardon steven Johnson Thomas f.Krauss Department of Physics University of YorkYO105DD YorkUK Department of Electronic Engineering University of YorkYO105DD YorkUK

Research toward photonic biosensors for point-of-care applications and personalized medicine is driven by the need for high-sensitivity,low-cost,and reliable *** the most sensitive modalities,interferometry offers particularly high performance,but typically lacks the required operational simplicity and ***,we introduce a common-path interferometric sensor based on guided-mode resonances to combine high performance with inherent *** sensor exploits the simultaneous excitation of two orthogonally polarized modes,and detects the relative phase change caused by biomolecular binding on the sensor *** wide dynamic range of the sensor,which is essential for fabrication and angle tolerance,as well as versatility,is controlled by integrating multiple,tuned structures in the field of *** approach circumvents the trade-off between sensitivity and dynamic range,typical of other phase-sensitive modalities,without increasing *** sensor enables the challenging label-free detection of procalcitonin,a small protein(13 kDa)and biomarker for infection,at the clinically relevant concentration of 1 pg mL^(−1),with a signal-to-noise ratio of *** result indicates the utility for an exemplary application in antibiotic guidance,and opens possibilities for detecting further clinically or environmentally relevant small molecules with an intrinsically simple and robust sensing modality.

关键词： dielectric integrating simplicity

A tunable ferroelectric based unreleased Rf resonator

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Microsystems & Nanoengineering 2020年第1期6卷 1334-1340页

作者： Yanbo He Bichoy Bahr Mengwei Si Peide Ye Dana weinstein Purdue University West LafayetteINUSA Kilby Labs Texas InstrumentsDallasTXUSA

This paper introduces the first tunable ferroelectric capacitor(feCAP)-based unreleased Rf MEMS resonator,integrated seamlessly in Texas Instruments’130 nm ferroelectric RAM(feRAM)*** designs presented here are monolithically integrated in solid-state CMOS technology,with no post-processing or release step typical of other MEMS *** array of feCAPs in this complementary metal-oxide-semiconductor(CMOS)technology’s back-end-of-line(BEOL)process were used to define the acoustic resonance cavity as well as the electromechanical *** achieve high quality factor(Q)of the resonator,acoustic waveguiding for vertical confinement within the CMOS stack is studied and *** design considerations are discussed to obtain lateral confinement and suppression of spurious *** feCAP resonator is demonstrated with fundamental resonance at 703 MHz and Q of *** gives a frequency-quality factor product f·Q=7:11×10^(11) which is 1.6×higher than the most state-of-the-art Pb(Zr,Ti)O_(3)(PZT)*** to the ferroelectric characteristics of the feCAPs,transduction of the resonator can be switched on and off by adjusting the electric *** this case,the resonance can be turned off completely at±0.3 V corresponding to the coercive voltage of the constituent feCAP *** novel switchable resonators may have promising applications in on-chip timing,ad-hoc radio front ends,and chip-scale sensors.

关键词： resonator tunable switched

High-Throughput Chemotyping of Cannabis and Hemp Extracts Using an Ultraviolet Microplate Reader and Multivariate Classifiers

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Journal of Analysis and Testing 2018年第3期2卷 210-222页

作者： Zewei Chen Peter de Boves Harrington steven f.Baugh Clippinger Laboratories Department of Chemistry and BiochemistryCenter for Intelligent Chemical InstrumentationOhio UniversityAthensOH 45701USA Chemistry Mapping Inc.5902 McIntyre St.GoldenCO 80403USA

As the use of Cannabis products as natural medicines burgeons,it is also appearing as a food *** is important to screen Cannabis samples as ingredients by profiling their chemical compositions,which is referred to as *** sets of botanical extracts were *** first set is referred to as Cannabis contained plant materials from 15 samples of the sativa,indica,and hybrids of the two *** second set contained 20 extracts from the variety of Cannabis sativa with low tetrahydrocannabinol(THC)concentrations,i.e.,below 0.3%,and,henceforth,will be referred to as *** ultraviolet(UV)microplate reader provides a cost-effective and high-throughput method for identifying chemotypes of plant extracts by their *** microplate reader affords rapid measurements of small volumes,e.g.,50μL,which demonstrates a potential to significantly reduce the analysis time and cost for Cannabis and hemp chemotyping or chemi-cal *** samples were measured on different days to demonstrate the robustness of the *** difference resolution(PDR)maps were used to visualize the separations among the *** multivariate classifiers,fuzzy rule-building expert system(fuRES),super partial least squares-discriminant analysis(sPLS-DA),support vector machine(SVM),and two tree-based support vector machines(SVMtreeG and SVMtreeH)were *** classifiers were validated with ten bootstrapped Latin partitions(BLPs).for the Cannabis extracts,the SVMtreeG yielded the best performance and the classification accuracy was 99.1±0.4%for spectra collected in the nonlinear absorbance *** the hemp extracts,the SVM classifier performed the best with a 97.4±0.6%classification *** results demonstrate that the UV microplate reader coupled with multivariate classifiers can be used as a high-throughput and cost-effective approach for chemotyping Cannabis.

关键词： Cannabis extracts Hemp extracts Ultraviolet microplate reader Multivariate models High-throughput chemotyping Chemometrics Projected difference resolution map