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Contribution of mechanical forces to structural synaptic plasticity:insights from 3D cellular motility mechanisms

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Neural Regeneration Research 2025年第7期20卷 1995-1996页

作者： rita O.Teodoro Mafalda Ribeiro Ramos Lara Carvalho iNOVA4Health NOVA Medical School|Faculdade de Ciências MédicasNMS|FCMUniversidade Nova de LisboaLisboaPortugal

Cells,tissues,and organs are constantly subjected to the action of mechanical forces from the extracellular environment-and the nervous system is no ***-intrinsic properties such as membrane lipid composition,abundance of mechanosensors,and cytoskeletal dynamics make cells more or less likely to sense these *** and extrinsic cues are integrated by cells and this combined information determines the rate and dynamics of membrane protrusion growth or retraction(Yamada and Sixt,2019).Cell protrusions are extensions of the plasma membrane that play crucial roles in diverse contexts such as cell migration and neuronal synapse *** the nervous system,neurons are highly dynamic cells that can change the size and number of their pre-and postsynaptic elements(called synaptic boutons and dendritic spines,respectively),in response to changes in the levels of synaptic activity through a process called *** plasticity is a hallmark of the nervous system and is present throughout our lives,being required for functions like memory formation or the learning of new motor skills(Minegishi et al.,2023;Pillai and Franze,2024).

关键词： plasticity structural mechanisms

Deuterated dextromethorphan/quinidine for agitation in Alzheimer's disease

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Neural Regeneration Research 2022年第5期17卷 1013-1014页

作者： rita Khoury Department of Psychiatry and Clinical Psychology Saint George Hospital University Medical Center-BeirutLebanon.Adjunct FacultyDepartment of Psychiatry and Behavioral NeuroscienceSaint Louis University School of MedicineSt.LouisMIUSA

Alzheimer's disease(AD)is the most common type of neurode generative disorder;it affects around 47 million individuals worldwide(Prince et al.,2013).AD rose from the 12 th most burdensome disease in the United States ... 详细信息

关键词： Alzheimer agitation

Insular mammalian fauna dynamics and paleogeography:A lesson from the Western Mediterranean islands

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Integrative Zoology 2018年第1期13卷 2-20页

作者： Maria rita PALOMBO Department of Earth Science Sapienza University of RomeRomaItaly CNR-IGAG Monterotondo(Roma)Italy

Since the time of Darwin(1859)and Wallace(1869),islands have been regarded by scientists as a prime target for scrutinizing the forces that may influence evolution and diversification and important elements in biogeographic *** research aims to scrutinize whether and to what extent the composition and structure of past mammal insular faunas and their changes through time may provide sound clues for inferring the paleogeographical evolution of a *** a case study,I critically analyzed the dynamics shown by the Plio-Pleistocene mammalian fauna of 3 Western Mediterranean insular districts,the Balearic Islands,Sardinia and Sicily,each characterized by its own peculiar paleobiogeographical evolutionary *** revision of faunas and the critical analysis of the dispersal ability of the ancestors of island settlers have allowed hypothesizing on the time and mode of island *** results obtained confirm that the early isolation of the Balearic Islands from the mainland led to the establishment of an endemic fauna since the pre-Messinian Miocene(?Astaracian European Land Mammal Age,MN7/8),and that Sardinia has definitely been isolated since the Pliocene,although dispersal events led to some faunal turnovers during the *** addition,the results suggest for Sicily a complex,still imperfectly disentangled history of alternate phases of complete separation and sporadic,more or less difficult connections with southern Italy.

关键词： dispersal islands mammal Plio–Pleistocene Western Mediterranean

New few parameters differential evolution algorithm with application to structural identification

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第1期6卷 1-14页

作者： rita Greco Ivo Vanzi Department of Civil Engineering Environmental Territory Building and Chemical Polytechnic University of Bari Department of Engineering and Geology University of Chieti-Pescara "G.d'Annunzio"

Differential evolution algorithm(DEA) is a stochastic, population-based global optimization method. In this paper, we propose new schemes for both mutation and crossover operators in order to enhance the performances of the standard DEA. The advantage of these proposed operators is that they are "parameters-less", without a tuning phase of algorithm parameters that is often a disadvantage of DEA. Once the modified differential evolutions are presented, a large comparative analysis is performed with the aim to assess both correctness and efficiency of the proposed operators. Advantages of proposed DEA are used in an important task of modern structural engineering that is mechanical identification under external dynamic loads. This is because of the importance of using a "parametersless" algorithm in identification problems whose characteristics typically vary strongly case by case, needing of a continuous set up of the algorithm proposed. This important advantage of proposed optimizers, in front of other identification algorithms, is used to develop a computer code suitable for the automatic identification of a simple supported beam subject to an impact load, that has been tested both using numerical simulations and real standard tests dynamic. The results point out that this algorithm is an interesting candidate for standard applications in structural identification problems.

关键词： Differential evolution Parametric identification Structural identification Optimization

Synthesis and Characterization of Rare Earth Ion Doped Nano ZnO

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Nano-Micro Letters 2012年第2期4卷 65-72页

作者： rita John Rajaram Rajakumari Department of Theoretical Physics University of Madras Department of Physics Queen Mary’s College

Zinc oxide(ZnO) doped with erbium at different concentrations was synthesized by solid-state reaction method and characterized by X-ray diffraction(XRD), scanning electron microscopic(SEM), UVabsorption spectroscopy, photoluminescence(PL) study and vibrating sample magnetometer. The XRD studies exhibit the presence of wurtzite crystal structure similar to the parent compound ZnO in 1% Er^(3+)doped Zn O,suggesting that doped Er^(3+)ions sit at the regular Zn^(2+)sites. However, same studies spread over the samples with Er^(3+)content>1% reveals the occurrence of secondary phase. SEM images of 1% Er^(3+)doped ZnO show the polycrystalline nature of the synthesized sample. UV-visible absorption spectrum of Er^(3+)doped ZnO nanocrystals shows a strong absorption peak at 388 nm due to ZnO band to band transition. The PL study exhibits emission in the visible region, due to excitonic as well as defect related transitions. The magnetizationfield curve of Er^(3+)doped ZnO nanocrystals showed ferromagnetic property at room-temperature.

关键词： Erbium doped zinc oxide Solid state reaction X-ray diffraction Photoluminescence VSM Room-temperature ferromagnetism

Young blood products:emerging treatment for Alzheimer's disease?

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Neural Regeneration Research 2018年第4期13卷 624-627页

作者： rita Khoury Elias Ghossoub Department of Psychiatry and Behavioral Neuroscience Saint Louis University

Alzheimer＇s disease is the most common neurodegenerative disorder and no disease-modifying treatment is currently *** has shown that while brain neurogenesis continues in adult life,it declines with *** parabiosis,plasma transfusions and direct administration of neural growth factors,animal studies have demonstrated the positive impact of exposure to young blood products on neurogenesis and synaptic plasticity in an aging *** hippocampus and the sub-ventricular zones were identified as the main regions *** findings have prompted researchers to experiment their effects in subjects with an established neurocognitive disorder,such as Alzheimer＇s *** argued that modification of brain vasculature,reactivation of adult neural stem cells,and remodeling of their synaptic activity/plasticity may lead to cognitive enhancement and increased *** pilot human study found that young donor plasma infusion protocols for adults with Alzheimer＇s disease were safe and feasible;however,no statistically significant improvements in cognition were *** is a need to conduct additional placebo-controlled human studies in larger *** studies should focus on identifying an “optimal age” at which an intervention in humans may yield significant cognitive enhancement,as well as determining the types of transfusions with the best efficacy and tolerability profiles.

关键词： young blood rejuvenation cognition Alzheimer's disease plasma transfusion aging neurogenesis

The intriguing giant deer from the Bate cave (Crete): could paleohistological evidence question its taxonomy and nomenclature?

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Integrative Zoology 2022年第1期17卷 54-77页

作者： Maria rita PALOMBO Marco ZEDDA CNR-IGAG c/o Department of Earth Sciences Sapienza UniversityRomaItaly Department of Veterinary Medicine University of SassariItaly

The research describes for the first time a possible case of pituitary gigantism in fossil mammals,precisely in *** pathology was detected in 2 long bones(tibia and metatarsus)belonging to an individual of an unusual large size found at the Bate cave(Rethymnon,Northern Crete).It formed the basis of Candiacervus major,the largest among the endemic deer species recorded in the Pleistocene-Early Holocene of *** and histomorphological examinations highlighted a reduction in cortical bone thickness and the presence of wide lacunae inside of the bone *** pathological conditions suggest a pituitary gigantism diagnosis also supported by some morphological evidence,such as the extremely elongated distal part of the metatarsal diaphysis,the proportionally small proximal epiphysis,and some bone *** diagnosis of a case of pituitary gigantism as presumed responsible for the extraordinary elongation of the tibia and the metatarsal bone is intriguing as they are,respectively,the paratype and the holotype of the *** species represents a case of a deviation from the“island rule”in Pleistocene large *** new evidence recommends a taxonomic and nomenclatural revision of this *** main outcomes of this research are as follows:(i)a case of pituitary gigantism is described for the first time in an extinct mammal;(ii)it is underlined that paleohistology may provide interesting clues for disentangling taxonomic and nomenclatural issues;(iii)one of the very few cases of gigantism in insular mammals is being questioned.

关键词： Candiacervus major Cretan deer island rule paleohistology pituitary gigantism

Lights and shadows in the evolutionary patterns of insular bovids

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Integrative Zoology 2014年第2期9卷 213-228页

作者： Roberto ROZZI Maria rita PALOMBO Department of Earth Sciences SapienzaUniversity of RomeRomeItaly Consiglio Nazionale delle Ricerche-Istituto di Geologia Ambientale e Geoingegneria(DNR-IGAG) RomeItaly

Endemic bovids are intriguing elements of insular *** living species include the Japanese serow(Cap-ricornis crispus)and the Formosan serow(***),the tamaraw from Mindoro,Philippines,(Bubalus min-dorensis)and the anoas(*** and ***),2 species of dwarf buffalos endemic to Sulawesi,*** endemic bovids are only recorded in some Asian,North American and Western Mediterranean *** we present a comprehensive overview of the changes in body size and evolutionary patterns ex-hibited by both extant and extinct insular *** appraisal indicates that each insular representative of Bo-vidae shows its own peculiar evolutionary model,albeit some parallel trends exist(*** in body size,allometric changes in limb bones,alteration of the life history traits).Some changes in morphology(*** simplification of horn cores,the increase in hypsodonty,the acquisition of a‘low-gear’locomotion),for in-stance,appear as common,albeit not general,patterns triggered by a combination of selective *** size patterns support the‘generality of the island rule’and suggest that biotic interaction had/have a major role in in-fluencing body size evolution in these species,although in different ways on different *** things consid-ered,available evidence suggest that a major role in the evolution of insular bovids is played by the structure of the insular community,the nature of available niches and by the dynamics of ecological interactions.

关键词： evolutionary island shadow

Do methods for predicting paleohabitats apply for mountain and insular fossil bovids?

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Integrative Zoology 2013年第3期8卷 244-259页

作者： Roberto ROZZI Maria rita PALOMBO Department of Earth Sciences SapienzaDepartment of Earth SciencesUniversity of Rome Consiglio Nazionale delle Ricerche–Istituto di Geologia Ambientale e Geoingegneria(CNR-IGAG) RomeItaly

A variety of methods have been developed to use bovid postcranial elements in the functional morphology approach to paleohabitat *** study represents a first attempt at testing morphometric methods based on astragalus and phalanges on extant mountain-dwelling bovids and insular fossil bovids from Sardinia assigned to the so-called‘Nesogoral group’,already regarded as close to the Caprini *** intended to answer the questions whether a classic four-habitats model could be successfully applied to extant mountain-dwelling bovids,and whether results obtained could support the hypothesis of a radiative evolution for the Sardinian *** obtained,on the one hand,highlighted some inadequacies of the method if not applied to African bovids;on the other hand,they stressed the difficulties of discriminating habitat preferences of Sardinian taxa only based on biometry of astragalus and ***,statistical habitat predictions suggest the contemporaneous presence in Sardinia of bovids having about the same size,but inhabiting different environments,giving support to the hypothesis that Sardinian representatives of the genus Nesogoral originated from a still unknown ancestor by an adaptive radiation evolutionary process.

关键词： Bovidae ecological morphology paleoecology Pleistocene Sardinia