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Intraspecific scaling and early life history determine the cost of free-flight in a large beetle(Batocera rufomaculata)

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Insect Science 2024年第2期31卷 524-532页

作者： Tomer Urcai eran Levin eran Gefen Gal Ribak Faculty of Life Sciences School of ZoologyTel Aviv UniversityTel AvivIsrael Steinhardt Museum of Natural History Israel National Center for Biodiversity StudiesTel AvivIsrael Department of Biology University of Haifa-OranimKiryat TivonIsrael

The scaling of the energetic cost of locomotion with body mass is well documented at the interspecific ***,methodological restrictions limit our understanding of the scaling of flight metabolic rate(MR)in free-flying *** is particularly true at the intraspecific level,where variation in body mass and flight energetics may have direct consequences for the fitness of an *** applied a 13C stable isotope method to investigate the scaling of MR with body mass during free-flight in the beetle Batocera *** species exhibits large intraspecific variation in adult body mass as a consequence of the environmental conditions during larval *** show that the flight-MR scales with body mass to the power of 0.57,with smaller conspecifics possessing up to 2.3 fold higher mass-specific flight MR than larger *** the scaling exponent of free-flight MR was found to be like that determined for tethered-flight,the energy expenditure during free-flight was more than 2.7 fold higher than for *** metabolic cost of flight should therefore be studied under free-flight conditions,a requirement now enabled by the 13C technique described herein for insect flight.

关键词： allometry body mass Coleoptera free-flight insect flight stable carbon isotope tethered-flight

An emerging terpolymeric nanoparticle pore former as an internal recrystallization inhibitor of celecoxib in controlled release amorphous solid dispersion beads:Experimental studies and molecular dynamics analysis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2669-2684页

作者： Jamie Anne Lugtu-Pe Xuning Zhang Sako Mirzaie Hao Han R.Chang Nour AL-Mousawi Kuan Chen Yongqiang Li Anil Kane Daniel Bar-shalom Xiao Yu Wu Advanced Pharmaceutics and Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoToronto M5S 3M2Canada Candoo Pharmatech Company Inc. Mississauga L5N 5M1Canada Department of Pharmacy University of CopenhagenCopenhagen DK-2100Denmark Patheon by Thermo Fisher Scientific Toronto Region Operations(TRO)Mississauga L5N 3X4Canada

Solid oral controlled release formulations feature numerous clinical advantages for drug candidates with adequate solubility and dissolution ***,most new chemical entities exhibit poor water solubility,and hence are exempt from such *** combining drug amorphization with controlled release formulation is promising to elevate drug solubility,like other supersaturating systems,the problem of drug recrystallization has yet to be resolved,particularly within the dosage ***,we explored the potential of an emerging,non-leachable terpolymer nanoparticle(TPN)pore former as an internal recrystallization inhibitor within controlled release amorphous solid dispersion(CRASD)beads comprising a poorly soluble drug(celecoxib)reservoir and insoluble polymer(ethylcellulose)*** to conventional pore former,polyvinylpyrrolidone(PVP),TPN-containing membranes exhibited superior structural integrity,less crystal formation at the CRASD bead surface,and greater extent of celecoxib ***-atom molecular dynamics analyses revealed that in the presence of TPN,intra-molecular bonding,crystal formation tendency,diffusion coefficient,and molecular flexibility of celecoxib were reduced,while intermolecular H-bonding was increased as compared to *** work suggests that selection of a pore former that promotes prolonged molecular separation within a nanoporous controlled release membrane structure may serve as an effective strategy to enhance amorphicity preservation inside CRASD.

关键词： Controlled release amorphous solid dispersion Poorly soluble drug Internal recrystallization Membrane-reservoir coated beads Molecular dynamics simulation Effect of pore formers Terpolymer nanogel Drug-polymer interactions

Comparative Efficacy of Lifestyle Modifications versus Pharmacotherapy on Weight Loss and Metabolic Health Outcomes: A Comprehensive Review

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Journal of Biosciences and Medicines 2024年第7期12卷 17-29页

作者： Abiodun Omolara Aboaba Miracle Chinonso Okoro Okelue Edwards Okobi Ifeoluwa Mary Falade Omosefe Enibokun Ogbeifun shalom Katas Kingsley Agbodike Uvieroghene Peter Ogbebor Moriamo Adedoyin Fashugba School of Medicine Avalon University Willemstad Curaao College of Medicine Imo State University Owerri Nigeria Department of Family Medicine Larkin Community Hospital Palm Spring Campus Miami FL USA Department of Medicine Mersey and West Lancashire Teaching Hospitals Rainhill UK Department of Family Medicine University of Alabama Birmingham AL USA College of Medicine International University of the Health Sciences (IUHS) Basseterre Saint Kitts and Nevis Department of Internal Medicine Obafemi Awolowo University Ile-Ife Nigeria Department of Family Medicine Madonna University Elele Nigeria Department of Internal Medicine University of Science Arts and Technology Olveston Montserrat

Background: Obesity has become a serious global public health challenge, given that it leads to various adverse health outcomes that include cardiovascular illnesses, diabetes, and certain types of cancer. The World Health Organization (WHO) has estimated that, at the end of 2022, 1 out of every 8 individuals were obese, and that the global adult obesity rates have over doubled since 1990, even as the adolescent obesity rates have quadrupled. Thus, as of 2022, nearly 2.5 billion adults, aged 18 years and above, were overweight, with 890 million being obese. Obesity and overweight incidence rate has been gradually increasing over the years, presenting significant challenges to the healthcare systems throughout the globe. In this regard, the objective of this systematic review was to evaluate the effectiveness and safety of lifestyle modifications (diet and physical activity) and pharmacotherapy in promoting weight loss and improving metabolic health in overweight adults. Methodology: To attain the above stated study objective, a systematic evaluation of previous studies was carried out, particularly studies that assessed the effectiveness and safety of lifestyle modifications (diet and physical activity) and pharmacotherapy in promoting weight loss and improving metabolic health in overweight adults. The authors have used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) in the selection of eligible studies for inclusion in the study. Results: The findings indicate that lifestyle interventions resulted in 5% - 10% weight reduction and significant improvements in metabolic indicators, while pharmacotherapy (GLP-1 receptor agonists) achieved up to 15% weight reduction and considerable metabolic health benefits. Further, comparative studies show lifestyle modifications provide overall health benefits, while medication is necessary for non-responders. Conclusion: Individualized treatment strategies are crucial, and further research is needed

关键词： Obesity Overweight Weight Loss Pharmacotherapy Glucose Metabolism Disorders

Circumventing the phonon bottleneck by multiphonon-mediated hot exciton cooling at the nanoscale

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npj Computational Materials 2023年第1期9卷 845-852页

作者： Dipti Jasrasaria eran Rabani Department of Chemistry University of CaliforniaBerkeleyCA 94720USA Materials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA The Sackler Center for Computational Molecular and Materials Science Tel Aviv UniversityTel Aviv 69978Israel Present address:Department of Chemistry Columbia UniversityNew YorkNY 10027USA

Nonradiative processes govern efficiencies of semiconductor nanocrystal(NC)-based devices.A central process is hot exciton cooling,or the nonradiative relaxation of a highly excited electron/hole pair to form a band-edge *** to quantum confinement effects,the timescale and mechanism of cooling are not well understood.A mismatch between electronic energy gaps and phonon frequencies has led to the hypothesis of a phonon bottleneck and extremely slow cooling,while enhanced electron-hole interactions have suggested ultrafast *** measurements of the cooling timescale range six orders of ***,we develop an atomistic approach to describe phonon-mediated exciton dynamics and simulate cooling in NCs of experimentally relevant *** find that cooling occurs on~30 fs timescales in CdSe NCs,in agreement with the most recent measurements,and that the phonon bottleneck is circumvented through a cascade of multiphonon-mediated relaxation ***,we identify NC handles for tuning the cooling timescale.

关键词： phonon relaxation excited

Turned Trochoidal Disturbance on a Liquid Jet Surface

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Chinese Journal of Mechanical Engineering 2014年第4期27卷 846-852页

作者： SADIK shalom KIRZHNER Felix KRAMARENKO Denis Department of Mechanical Engineering ORT Braude College Division of Environmental Water and Agricultural Engineering Faculty of Civil and Environmental EngineeringTechnion-IIT Haifa 32000 Israel Biotechnology Engineering ORT Braude College

This paper shows that a turned trochoidal function disturbance may lead to peripheral drops production. The resulting model is used to describe that a turned trochoidal disturbance leads to peripheral drops production on the liquid jet surface without the necessity for superimposed disturbances. The trochoid is a non-unique parametric function. Only non-unique parametric functions disturbances may lead to peripheral drops production. The trochoidal function disturbance is decomposed to Fourier series. Every Fourier element receives an amplification factor in accordance to the Rayleigh inviscid jet model. Peripheral drops are received on the jet surface. The paper shows that all trochoidal disturbance functions, prolate cycloid, cycloid and curtate cycloid have a capability of peripheral drops producing. A limited capability of peripheral drops production is introduced for the trochoidal curtate cycloid. Produced drops size are reduced for increasing the jet velocity and wave number. Smaller drops are also received by transition from the prolate cycloid to curtate cycloid disturbance.

关键词： drops liquid jet trochoidal function

Neuromuscular junction mitochondrial enrichment: a “double-edged sword” underlying the selective motor neuron vulnerability in amyotrophic lateral sclerosis

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Neural Regeneration Research 2021年第1期16卷 115-116页

作者： Topaz Altman eran Perlson Department of Physiology and Pharmacology Sackler Faculty of MedicineTel-Aviv UniversityTel-AvivIsrael Sagol School of Neuroscience Tel-Aviv UniversityTel-AvivIsrael

Motor neurons are highly polarized cells,with long axons that extend to more than 1 m in the adult *** axons further arborize into a specialized synaptic compartment,the motor unit,containing up to 2000 neuromuscular junctions(NMJs).While the size of other neuronal synapses can be up to 1μm,the NMJ is much larger and can reach 10–30μm(Jones et al.,2017).The vast size of the motor unit requires motor neurons to evolutionally adapt and supply this distal portion with a sufficient amount of ATP,as well as to replenish the axonal protein pool in order to maintain their synapses.

关键词： specialized maintain sword

Global epigenetic changes during somatic cell reprogramming to iPS cells

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分子细胞生物学报:英文版 2011年第6期3卷 341-350页

作者： Anna Mattout Alva Biran eran Meshorer Department of Genetics Institute of Life SciencesThe Hebrew University of JerusalemJerusalem 91904Israel

Embryonic stem cells(ESCs)exhibit unique chromatin features,including a permissive transcriptional program and an open,decondensed chromatin *** pluripotent stem cells(iPSCs),which are very similar to ESCs,hold great promise for therapy and basic ***,the mechanisms by which reprogramming occurs and the chromatin organization that underlies the reprogramming process are largely *** we characterize and compare the epigenetic landscapes of partially and fully reprogrammed iPSCs to mouse embryonic fibroblasts(MEFs)and ESCs,which serves as a standard for *** immuno-fluorescence and biochemical fractionations,we analyzed the levels and distribution of a battery of histone modifications(H3ac,H4ac,H4K5ac,H3K9ac,H3K27ac,H3K4me3,H3K36me2,H3K9me3,H3K27me3,and gH2AX),as well as HP1a and lamin *** find that fully reprogrammed iPSCs are epigenetically identical to ESCs,and that partially reprogrammed iPSCs are closer to ***,combining both time-course reprogramming experiments and data from the partially reprogrammed iPSCs,we find that heterochromatin reorganization precedes Nanog expression and active histone ***,these data delineate the global epigenetic state of iPSCs in conjunction with their pluripotent state,and demonstrate that heterochromatin precedes euchromatin in reorganization during reprogramming.

关键词： chromatin pluripotency reprogramming iPSCs ESCs histone modifications epigenetics

The promise of stem cell-based therapeutics in ophthalmology

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Neural Regeneration Research 2017年第2期12卷 173-180页

作者： Israel Aharony shalom Michowiz Nitza Goldenberg-Cohen The Krieger Eye Research Laboratory Felsenstein Medical Research CenterPetach TikvaIsraelSackler Faculty of MedicineTel Aviv UniversityTel AvivIsrael Department of Neurosurgery Rabin Medical Center-Beilinson HospitalPetach TikvaIsrael Department of Ophthalmology Bnai Zion Medical CenterHaifaIsrael

The promising role of cellular therapies in the preservation and restoration of visual function has prompted intensive efforts to characterize embryonic, adult, and induced pluripotent stem cells for regenerative purposes. Three main approaches to the use of stem cells have been described： sustained drug delivery, immunomodulation, and differentiation into various ocular structures. Studies of the differentiation capacity of all three types of stem cells into epithelial, neural, glial and vascular phenotypes have reached proof-of-concept in culture, but the correction of vision is still in the early developmental stages, and the requirements for effective in vivo implementation are still unclear. We present an overview of some of the preclinical findings on stem-cell rescue and regeneration of the cornea and retina in acute injury and degenerative disorders.

关键词： embryonic stem cells adult stem cells induced pluripotent stem cells cornea retina neuroprotection immunomodulation tissue recovery regeneration acute ocular injury degenerative retinal disorders

Muscle secretion of toxic factors,regulated by miR126-5p,facilitates motor neuron degeneration in amyotrophic lateral sclerosis

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Neural Regeneration Research 2019年第6期14卷 969-970页

作者： Roy Maimon eran Perlson Department of Physiology and Pharmacology Sackler Faculty of MedicineTel Aviv University

Amyotrophic lateral sclerosis(ALS)is a lethal neurodegenerative disease characterized by neuromuscular junction(NMJ)disruption,motor neuron(MN)axon degeneration,and neuronal ***,there is currently no effective treatment available for ALS and consequently,most patients die several years post *** neurodegeneration that occurs in ALS is considered to be a non-cell autonomous process involving interactions between the motor neuron and its diverse extracellular microenvironments via an unknown *** Axonopathy is one of the early disease signs;however,the involvement and contribution of neighboring tissues and specifically,the muscle environment to the disease pathology remain *** works have concluded that muscles play a minor role or none at all in ALS pathology.

关键词： Muscle secretion toxic factors facilitates motor