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Gustatory responsiveness in Vespula germanica workers:exploring the interplay between sensory perception and task specialization

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Insect Science 2024年第2期31卷 587-598页

作者： Analia Mattiacci Carolina Mengoni Gonalons MaitéMasciocchi Juan C.Corley Grupo de Ecologia de Poblaciones de Insectos IFAB(CONICETINTA EEA Bariloche)BarilocheArgentina Departamento de Ecologia Centro Regional Universitario BarilocheUniversidad Nacional Del ComahueBarilocheArgentina Departamento de Biodiversidad y biologia experimental Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina

Workers'task specialization and division of labor are critical features of social insects'ecological success.It has been proposed that the division of labor relies on response threshold models:individuals varying their sensitivity(and responsiveness)to biologically relevant stimuli and performing a specific task when a stimulus exceeds an internal threshold.In this work,we study carbohydrate and protein responsiveness and their relation to worker task specialization in Vespula germanica,an invasive social wasp.The sucrose and peptone responsiveness of two different subcastes,preforagers and foragers,was determined by stimulating the antenna of the wasps with increasing concentrations of the solution and quantifying whether each concentration elicited a licking response.We studied responsiveness in five different ways:(1)response threshold,(2)concentration 50(concentration to which at least 50%of wasps responded),(3)maximum response,(4)mean scores and(5)median scores.Our results suggest that V germanica foragers are more sensitive to sucrose(lower thresholds)than preforager workers.However,we found no differences for peptone thresholds(i.e.,a protein resource).Nonetheless,this is the first study to investigate response thresholds for protein resources.The intercaste variation in sucrose responsiveness shown in our work contributes to the existing knowledge about response threshold theory as a mechanism for task specialization observed in V germanica.

关键词： carbohydrates responsiveness division of labor protein responsiveness response thresholds models social insect yellow jacket

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Role of peripheral amyloid-β aggregates in Alzheimer’s disease: mechanistic, diagnostic, and therapeutic implications

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Neural Regeneration Research 2025年第4期20卷 1087-1089页

作者： Nazaret Gamez Rodrigo Morales Department of Neurology The University of Texas Health Science Center at HoustonHoustonTXUSA Centro Integrativo de biologia y Quimica Aplicada(CIBQA) Universidad Bernardo O’HigginsSantiagoChile

Compelling evidence demonstrates that the levels of peripheral amyloid-β(Aβ)fluctuate in Alzheimer’s disease(AD)patients.Moreover,Aβdeposits have been identified in peripheral tissues.However,the relevance of peripheral Aβ(misfolded or not)in pathological situations,and the temporal appearance of these pathological fluctuations,are not well understood.The presence of misfolded Aβin peripheral compartments raises concerns on potential inter-individual transmissions considering the well-reported prion-like properties of this disease-associated protein.The latter is supported by multiple reports demonstrating that Aβmisfolding can be transmitted between humans and experimental animals through multiple routes of exposure.In this mini-review,we discuss the potential implications of peripheral,disease-associated Aβin disease mechanisms,as well as in diagnostic and therapeutic approaches.

关键词： therapeutic amyloid latter

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Factors affecting the dominance hierarchy dynamics in a hummingbird assemblage

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Current Zoology 2019年第3期65卷 261-268页

作者： Ubaldo MARQUEZ-LUNA Carlos Lara Pablo CORCUERA Pedro Luis VALVERDE doctorado en Ciencias Biologicas y de la Salud Universidad Autonoma Metropolitana-lztapalapa Ciudad de Mexico Mexico Centro de Investigacion en Ciencia Biologicas Universidad Autonoma de Tlaxcala. Km 10.5 Autopista Tlaxcala-San Martin Texmelucan San Felipe Ixtacuixtla Tlaxcala Mexico Departamento de biologia Universidad Autonoma Metropolitana-lztapalapa Ciudad de Mexico

Intra and in terspecific competiti on for n ectar play an imports nt role in hummingbird communities. Larger sized species usually exclude smaller species from the rich floral resources. However, it has been recently postulated that the competitive advantages of a large body size decline as the evolutionary distance between the contending species in creases. In this study, we analyzed dominance hierarchy dynamics in a hummingbird assemblage in central Mexico. By monitoring hummingbird territories established in three plant species through 1 year, we assessed the effects of energy within territories and the territory owners identity in the frequency of inter and intraspecific encounters. We also evaluated if these factors affect the dominance of larger species when they compete against smaller distantly related contenders. Our results show that their frequency of intraspecific encounters was related with the identity of the territory's owner. On the contrary, the frequency of interspecific encounters was related with both the territory and the identity of the territory's owner. We did not find a significant difference between the number of encounters dominated by larger and smaller species and their conte nders. However, the in crease in genetic dista nee between contenders was positively associated with a higher frequency of encounters dominated by small hummingbirds.Our results showed that the ecological factors and evolutionary relationships among contenders play important roles in the dominance hierarchy dynamics.

关键词： agonistic behavior competition hummingbirds resource quality territoriality

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Insights into myelin dysfunction in schizophrenia and bipolar disorder

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World Journal of Psychiatry 2022年第2期12卷 264-285页

作者： Marcela Valdés-Tovar Alejandra Monserrat Rodríguez-Ramírez Leslye Rodríguez-Cárdenas Carlo E Sotelo-Ramírez Beatriz Camarena Marco Antonio Sanabrais-Jiménez Héctor Solís-Chagoyán Jesús Argueta Germán Octavio López-Riquelme Departamento de Farmacogenética Subdirección de Investigaciones ClínicasInstituto Nacional de Psiquiatría Ramón de la Fuente MuñizMexico City 14370Mexico Departamento de Farmacogenética Instituto Nacional de Psiquiatría Ramón de la Fuente MuñizMexico City 14370Mexico doctorado en Biología experimental Universidad Autónoma Metropolitana-IztapalapaMexico City 09340Mexico Laboratorio de Neurofarmacología Instituto Nacional de Psiquiatría Ramón de la Fuente MuñizMexico City 14370Mexico Laboratorio de Socioneurobiología Centro de Investigación en Ciencias CognitivasUniversidad del Estado de MorelosCuernavaca 62209MorelosMexico

Schizophrenia and bipolar disorder are disabling psychiatric disorders with a worldwide prevalence of approximately 1%.Both disorders present chronic and deteriorating prognoses that impose a large burden,not only on patients but also on society and health systems.These mental illnesses share several clinical and neurobiological traits;of these traits,oligodendroglial dysfunction and alterations to white matter(WM)tracts could underlie the disconnection between brain regions related to their symptomatic domains.WM is mainly composed of heavily myelinated axons and glial cells.Myelin internodes are discrete axon-wrapping membrane sheaths formed by oligodendrocyte processes.Myelin ensheathment allows fast and efficient conduction of nerve impulses through the nodes of Ranvier,improving the overall function of neuronal circuits.Rapid and precisely synchronized nerve impulse conduction through fibers that connect distant brain structures is crucial for higher-level functions,such as cognition,memory,mood,and language.Several cellular and subcellular anomalies related to myelin and oligodendrocytes have been found in postmortem samples from patients with schizophrenia or bipolar disorder,and neuroimaging techniques have revealed consistent alterations at the macroscale connectomic level in both disorders.In this work,evidence regarding these multilevel alterations in oligodendrocytes and myelinated tracts is discussed,and the involvement of proteins in key functions of the oligodendroglial lineage,such as oligodendrogenesis and myelination,is highlighted.The molecular components of the axo-myelin unit could be important targets for novel therapeutic approaches to schizophrenia and bipolar disorder.

关键词： Myelin sheath Oligodendroglia Schizophrenia Bipolar disorder White matter

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Bats and their vital ecosystem services:a global review

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Integrative Zoology 2022年第1期17卷 2-23页

作者： Leidy Azucena RAMÍREZ-FRÁNCEL Leidy Viviana GARCÍA-HERRERA Sergio LOSADA-PRADO Gladys REINOSO-FLÓREZ Alfonso SÁNCHEZ-HERNÁNDEZ Sergio ESTRADA-VILLEGAS Burton KLIM Giovany GUEVARA Programa de doctorado en Ciencias Biológicas&Grupo de Investigación en Zoología(GIZ) Facultad de CienciasUniversidad del TolimaIbaguéColombia Programa para la Conservación de los Murciélagos de Colombia BogotáD.C.Colombia Departamento de Biología&Grupo de Investigación en Zoología(GIZ) Facultad de CienciasUniversidad del TolimaIbaguéColombia Departamento de Matemáticas y Estadística Facultad de CienciasUniversidad del TolimaIbaguéColombia Yale School of the environment Yale UniversityNew HavenConnecticutUSA Smithsonian Tropical Research Institute BalboaRepublic of Panama Department of Natural History Royal Ontario MuseumTorontoOntarioCanada

Bats play crucial ecosystem services as seed dispersers,pollinators,controllers of insects,and nutrient recyclers.However,there has not been a thorough global review evaluating these roles in bats across all biogeographical regions of the world.We reviewed the literature published during the last two decades and identified 283 relevant studies:78 dealt with the control of potential insect pests by bats,80 related to the suppression of other arthropods,60 on the dispersal of native or endemic seeds,11 dealt with the dispersal of seeds of introduced plants,29 on the pollination of native or endemic plants,1 study on pollination of introduced plants,and 24 on the use of guano as fertilizer.Our literature search showed that queries combining the terms“seed dispersal,”“insectivorous bats,”“nectarivorous bats,”“use of guano,”and“ecosystem services”returned 577 studies,but half were experimental in nature.We found that the evaluation of ecosystem services by bats has been mostly conducted in the Neotropical and Palearctic regions.To detect differences across relevant studies,and to explain trends in the study of ecosystem services provided by bats,we performed generalized linear mixed models(GLMM)fitted with a Poisson distribution to analyze potential differences among sampling methods.We identified 409 bat species that provide ecosystem services,752 insect species consumed by bats and 549 plant species either dispersed or pollinated by bats.Our review summarizes the importance of conserving bat populations and the ecological services they provide,which is especially important during the current pandemic.

关键词： chiroptera ecosystem services frugivory,guano,insectivory nectarivory pest control pollination seed dispersal

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Release of interleukin-10 and neurotrophic factors in the choroid plexus：possible inductors of neurogenesis following copolymer-1 immunization after cerebral ischemia

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Neural Regeneration Research 2018年第10期13卷 1743-1752页

作者： Yolanda Cruz Edna E.García Jessica V.Gálvez Stella V.Arias-Santiago Horacio G.Carvajal Raúl Silva-García Herlinda Bonilla-Jaime Julio Rojas-Castaneda Antonio Ibarra Centro de Investigación en Ciencias de la Salud (CICSA) FCSUniversidad Anáhuac México Norte Huixquilucan Estado de México México Lab. De biologia de la reproducción UAMI. Ciudad de México México Hospital de Pediatría CMN Siglo XXI. Ciudad de México México Subdirección de Medicina experimental Instituto Nacional de PediatríaCiudad de México México doctorado en Ciencias Biológicas División de Ciencias Biológicas y de la SaludUniversidad Autónoma MetropolitanaUnidad Iztapalapa.Ciudad de México México

Copolymer-1（Cop-1） is a peptide with immunomodulatory properties, approved by the Food and Drug Administration of United States in the treatment of multiple sclerosis. Cop-1 has been shown to exert neuroprotective effects and induce neurogenesis in cerebral ischemia models. Nevertheless, the mechanism involved in the neurogenic action of this compound remains unknown. The choroid plexus（CP） is a network of cells that constitute the interphase between the immune and central nervous systems, with the ability to mediate neurogenesis through the release of cytokines and growth factors. Therefore, the CP could play a role in Cop-1-induced neurogenesis. In order to determine the participation of the CP in the induction of neurogenesis after Cop-1 immunization, we evaluated the gene expression of various growth factors（brain-derived neurotrophic factor, insulin-like growth factor 1, neurotrophin-3） and cytokines（tumor necrosis factor alpha, interferon-gamma, interleukin-4（IL-4）, IL-10 and IL-17）, in the CP at 14 days after ischemia. Furthermore, we analyzed the correlation between the expression of these genes and neurogenesis. Our results showed that Cop-1 was capable of stimulating an upregulation in the expression of the genes encoding for brain-derived neurotrophic factor, insulin-like growth factor 1, neurotrophin-3 and IL-10 in the CP, which correlated with an increase in neurogenesis in the subventricular and subgranular zone. As well, we observed a downregulation of IL-17 gene expression. This study demonstrates the effect of Cop-1 on the expression of growth factors and IL-10 in the CP, in the same way, presents a possible mechanism involved in the neurogenic effect of Cop-1.

关键词： choroid plexus growth factors immunomodulation protective autoimmunity Cop-1 Copaxone stroke glatiramer acetate t MCAo focal cerebral ischemia

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The Acute and Chronic Effects of Co-Administration of Turmeric and Black Pepper Extracts in Genetic Hypertension

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Journal of Biosciences and Medicines 2023年第8期11卷 114-128页

作者： Ma. Guadalupe Calderón-Gallardo Lilia Castillo-Martínez Samuel Estrada-Soto Itzell A. Gallardo-Ortíz Rafael Villalobos-Molina Unidad de Biomedicina Facultad de Estudios Superiores Iztacala Universidad Nacional Autónoma de México Tlalnepantla México Programa de Maestría y doctorado en Ciencias Médicas Odontológicas y de la Salud Doctorado en Investigación Clínica Experimental en Salud Universidad Nacional Autónoma de México Ciudad de México México Instituto Nacional de Nutrición Salvador Zubirán Ciudad de México México Facultad de Farmacia Universidad Autónoma del Estado de Morelos Cuernavaca México

High blood pressure is the main risk factor for cardiovascular diseases, it affects many people worldwide and is a public health problem. This study explored the acute and chronic actions of a mixture of turmeric (95% curcumin) plus black pepper (95% piperine) extracts, in the blood pressure pattern in spontaneously hypertensive rats (SHR) along they age. For the acute study male adult (4 - 7 months old) SHR and their control Wistar Kyoto rats (WKY) were used. A single oral dose of the mixture of turmeric/black pepper extracts (200 mg/2mg, respectively) suspension was administered. Tail-cuff was used to determine blood pressure during 180 min. For the chronic study, young (1-month-old) male SHR and their control WKY rats were fed with standard chow, or standard chow combined with cocoa, or combined with cocoa plus the mixture of turmeric/black pepper extracts;tail-cuff was used to determine blood pressure once a week, along 12 weeks. In a second chronic assay adult (5 months old) male SHR and their control WKY rats were fed with standard chow, or standard chow combined with cocoa, or combined with cocoa plus the mixture of turmeric/black pepper extracts;tail-cuff was used to determine blood pressure once a week, along 12 weeks. In all three studies, a decrease in systolic, diastolic and mean blood pressure was observed, being higher in SHR and negligible in WKY rats. The mixture of turmeric/black pepper extracts showed antihypertensive actions in SHR rats with no effect on WKY rats. The mixture delayed the onset of hypertension in young SHR rats.

关键词： Curcuma longa L. Peper nigrum L. Hypertension Polyphenol SHR

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Classical olfactory conditioning promotes long-term memory and improves odor-cued flight orientation in the South American native bumblebee Bombus pauloensis

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Current Zoology 2021年第5期67卷 561-563页

作者： Denise NERY Florencia PALOTTINI Walter M.FARINA Laboratorio de Insectos Sociales Departamento de Biodiversidad y Biologia ExperimentalFacultad de Ciencias NaturalesUniversidad de Buenos AiresBuenos AiresArgentina Instituto de Fisiologia Biologia Molecular y Neurociencias(IFIBYNE)CONICET-Universidad de Buenos AiresBuenos AiresArgentina

When collecting a flower,bumblebees learn to associate floral features with reward,preferring,and specializing in the most profitable ones they visit(Chittka et al.1999).The proboscis extension reflex(PER)occurs naturally in the feeding context allowing individuals to access the floral nectaries.Under controlled conditions,the PER paradigm is a well-established controlled learning procedure used in honeybees(Takeda 1961),and some bumblebees of the genus Bombus(Laloi et al.1999).The assessment of cognitive capacities in an operant context has been studied mainly in B.terrestris and B.impatiens(Chittka 1998;Mirwan and Kevan 2014).However,little is known about the ability to evoke associative memories in an operant context,which had been acquired in a classical one.In turn,on the contrary,the Bombus genus also has the capacity to form longterm memories(Chittka 1998;McAulay et al.2015).In particular,the South American bumblebee B.pauloensis(sin.B.atratus)can learn a pure odor when it is presented in a paired association with a sugar reward within a PER paradigm(Palottini et al.2018).As other species,this one is a commercially reared pollinator that is increasingly managed in pollination services of some South American countries and they could be important for increasing production of crops(Palottini et al.2018).

关键词： crops sugar associative

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Spinal cord injury drives chronic brain changes

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Neural Regeneration Research 2017年第7期12卷 1044-1047页

作者： Ignacio Jure Florencia Labombarda Laboratorio de Bioquimica Neuroendocrina Instituto de Biologia y Medicina Experimental CONICET Buenos Aires Argentina Departamento de Bioqulmica Humana Facultad de Medicina Universidad de Buenos Aires Buenos Aires Argentina

Only a few studies have considered changes in brain structures other than sensory and motor cortex after spinal cord injury,although cognitive impairments have been reported in these patients.Spinal cord injury results in chronic brain neuroinflammation with consequent neurodegeneration and cognitive decline in rodents.Regarding the hippocampus,neurogenesis is reduced and reactive gliosis increased.These longterm abnormalities could explain behavioral impairments exhibited in humans patients suffering from spinal cord trauma.

关键词： spinal cord injury brain neurodegeneration neuroinflammation

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Pronuclear formation by ICSI using chemically activated ovine oocytes and zona pellucida bound sperm

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Journal of Animal Science and Biotechnology 2017年第2期8卷 370-377页

作者： J.E.Hernández-Pichardo Y.Ducolomb S.Romo M.E.Kjelland R.Fierro F.Casillas M.Betancourt División de Ciencias Biológicas y de la Salud Departamento de Producción Agrícola y AnimalUniversidad Autónoma Metropolitana-XochimilcoCiudad de MexicoMexico Division de Ciencias Biologicas y de la Salud Departamento de Ciencias de la SaludUniversidad Autónoma Metropolitana-IztapalapaSan Rafael Atlixco 186CP 09340 Ciudad de MexicoMexico Departamento de Ciencias Pecuarias Facultad de EstudiosSuperiores CuautitlanUNAMCiudad de MexicoEstado de MexicoMexico Conservation Genetics&BiotechLLCValley CityNDUSA Division de Ciencias Biologicas y de la Salud Departamento de Biologia de la ReproduccionUniversidad Autonoma Metropolitana-lztapalapaCiudad de MexicoMexico doctorado en biologia experimental Universidad Autonoma Metropolitana-lztapalapaCiudad de MexicoMexico

Background： In order to improve ICSI, appropiate sperm selection and oocyte activation is necessary. The objective of the present study was to determine the efficiency of fertilization using ICSI with chemically activated ovine oocytes and sperm selected by swim up（SU） or swim up ＋ zona pellucida（SU ＋ ZP） binding.Results： Experiment 1, 4–20 replicates with total 821 in vitro matured oocytes were chemically activated with ethanol, calcium ionophore or ionomycin, to determine oocyte activation（precense of one PN）. Treatments showed similar results（54, 47, 42 %, respectively） but statistically differents（P 0.05）.Conclusions： Chemical activation induces higher ovine oocyte activation than mechanical activation. Ethanol slightly displays higher oocyte activation than calcium ionophore and ionomicine. Sperm selection with SU ＋ ZP increased AR/A and AR/D rates in comparison with SU in fresh and frozen-thawed sperm. According to this, in terms of fertilization rates, chemical activation after ICSI increased oocyte PN formation compared to mechanical activation. Also, fresh sperm treated with SU and SU ＋ ZP were significantly different than frozen-thawed sperm,but between sperm treatments no significant differences were obtained.

关键词： Ethanol ICSI Oocyte activation Ovine Pronucleus Zona pellucida

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