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Thermally Dependent Behaviour of Cold-Blooded Animals. Overcoming Two Temperature Barriers.on the Way to Warm-Blooded

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Journal of Behavioral and Brain s.ience 2023年第5期13卷 95-112页

作者： yulia s. mednikova s.rgei N. Kalabus.ev Ins.itute of Higher Nervous.Activity and Neurophys.ology of RAs Moscow Russia Ins.itute of Functional Genomics Lomonosov Moscow State University Moscow Russia V.A.Negovs.y Res.arch Ins.itute of General Reanimatology Moscow Russia

Background: The temperature preferences.of cold-blooded animals.are different for different groups.of animals.and are clos.ly related to their evolutionary s.atus.and level of adaptive capabilities. The range of preferred temperatures.for reptiles.(28°C - 32°C) coincides.with the zone of temperature-dependent increas. in the rate of the M-cholinergic reaction in the brain, which was.previous.y found in warm-blooded neurons. The growth of the M-cholinergic proces. contributes.to the trans.tion of adaptive behavior to a higher level. Of the cold-blooded, only reptiles.actively us. thermoregulatory behavior as.a tool to achieve a temperature optimum. This.paper is.devoted to the s.udy of the behavior of red-eared turtles.aimed at reaching the range of preferred temperatures. Temperature conditions.neces.ary for the s.rvival of different groups.of cold-blooded animals.are compared and the reas.n for temperature preferences.is.dis.us.ed. Methods. The behavior of turtles.was.s.udied under conditions.of variable s.lar radiation and in a 3-s.ction terrarium with gradual temperature ranges. 23°C - 24°C;28°C - 31°C and 45°C - 50°C. Res.lts. It was.found that prolonged (up to 1.5 hours. heating at a temperature of 45°C - 50°C was.the bes. way to achieve the preferred temperatures. This.method of heating res.lts.in increas.ng the temperature of the s.ell to an average of 37°C, followed by a very s.ow decreas. during 4 - 6 hours.within the limits.that clos.ly coincided with the preferred level. Conclus.on: The res.lts.obtained demons.rate that the main function of the turtle s.ell is.to accumulate heat and keep it for a long time in a variable climate. The preferred temperature achieved in this.cas. is.neces.ary for the temperature-dependent trans.tion of the rate of the M-cholinergic reaction in the brain to a higher level, which creates.more s.gnificant adaptive capabilities. The temperature range of the M-cholinergic proces. has.two inflection points.at 27°C - 29°C and 34°C -

关键词： Preferred Temperatures Adaptive Capabilities Turtles s.ell Ice-Free Era Permian Period Mes.zoic Era

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Heterogeneity of the Neural Compos.tion of Cortical Regions.as.a Condition for a Wide Range Regulating s.ontaneous.Activity

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Journal of Behavioral and Brain s.ience 2020年第5期10卷 220-236页

作者： yulia s. mednikova Anna V. Rogal Ins.itute of Higher Nervous.Activity and Neurophys.ology of RAs Moscow Russia

On the s.ices.of s.ns.rimotor and frontal cortex in layer V of guinea pigs.the divers.ty of neuronal s.ontaneous.activity, the mechanis. of its.origin and functional s.ecificity were s.udied. In both regions. neurons.that did not have s.ontaneous.activity predominated (39% in the s.ns.rimotor cortex and 32% in the frontal cortex) over neurons.with any other firing levels. The iontophoretic application of the excitatory trans.itter, glutamate, caus.d activation s.ike reactions.in all regis.ered neurons.moreover, s.ort-term activation reactions.to glutamate had a s.gnificantly longer after-dis.harge in neurons.of the frontal cortex (up to 2500 ms.and more) compared to reactions.of neurons.of the s.ns.rimotor region. This.means.that pos.excitatory hyperpolarization in nerve cells.of the frontal cortex is.les. expres.ed and, therefore, they have a lower dens.ty of K+ channels.on their membranes. With an increas. in the level of s.ontaneous.activity, K+ membrane permeability decreas.s. which is.confirmed by the appearance of a long activation reaction to acetylcholine (which blocks.K+ channels., exactly when s.ontaneous.firing appears.in “s.lent” neurons. Des.ite the fact that s.ontaneous.activity is.formed by glutamatergic excitation, its.cons.derable divers.ty is.as.ociated with the s.ructural and membrane characteris.ics.of neurons. which determine the different degrees.of EPs.s.attenuation on the way of moving along dendrites. Acetylcholine regulates.this.proces. in different ways. in accordance with different s.ates.of K+ membrane permeability. Therefore, the lower content of K+ channels.on the membranes.of neurons.of the frontal cortex does.not allow regulating s.ontaneous.activity in the s.me range as.occurs.in neurons.of the s.ns.rimotor region. The pres.nce of a high proportion of s.ontaneous.y inactive neurons.in the cortex (higher in the s.ns.rimotor cortex) s.gges.s.that cortical neurons.are generally characterized by a high dens.ty of K+ channels.and a s.gni

关键词： s.ns.rimotor Cortex Frontal Cortex s.ontaneous Activity Glutamate Pos.-Activation Aftereffect Acetylcholine

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Energy As.ects.of s.dium Thiopental Action on Nervous.Activity

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Journal of Behavioral and Brain s.ience 2019年第2期9卷 33-53页

作者： yulia s. mednikova Mikhail K. Kozlov Alexander N. Makarenko Ins.itute of Higher Nervous.Activity and Neurophys.ology of RAs Moscow Russia Bogomolets.National Medical Univers.ty Kyiv Ukraine

s.dium thiopental, us.d in a narcotic dos., makes.it pos.ible to identify the nervous.proces.es.that underlie cons.ious.es. and es.ablis. the caus.s.of its.dis.rder. When s.udying the cortical EEG activity, the impuls.s.of individual nerve cells.and the electromyographic activity of the mus.les.of the forelimb, it was.found that thiopental blocks.a number of neuronal reactions.requiring energy s.pport: tonic activating reactions.to acetylcholine, applied to neurons. ceas.;the rate of s.ontaneous.neuronal activity drops.the s.age of non-s.ecific activation in res.ons. to electrocutaneous.s.imulation dis.ppears. s., thiopental blocks.cons.ious.es. by s.gnificant limitation of the brain energy metabolis.. This.res.lts.in a los. of the adaptive function of the central nervous.s.s.em. At the s.me time, glutamatergic excitation, the formation of which does.not depend on energy s.pport, is.res.s.ant to the action of thiopental. The blocking of the brain’s.energy s.pply caus.d by thiopental, in accordance with its.depth, develops.in two s.ages.hypoxic and narcotic. The hypoxic s.age is.accompanied by hyperactivity in the nervous.s.s.em, which is.manifes.ed by epileptiform dis.harges.on the EEG and powerful unmotivated movement;the narcotic s.age is.as.ociated with blockade of motor activity and flattening of EEG os.illations. The pos.-narcotic s.ate as.ociated with the cons.quence of the hypoxic effect of thiopental leads.to the los. of ionic homeos.as.s.and is.accompanied by a s.eady drop in the amplitude of cortical neuron s.ikes.

关键词： s.dium Thiopental Acetylcholine Hypoxic s.ate Narcotic Condition Pos.-Narcotic Pathology

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Functional and Pathological Influence of Hypothermia on s.ike Activity of Cortical Neurons

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Journal of Behavioral and Brain s.ience 2021年第5期11卷 107-130页

作者： yulia s. mednikova Nadezhda M. Zakharova Natalia V. Pas.kova Ins.itute of Higher Nervous.Activity and Neurophys.ology of RAs Moscow Russia ICB RAs Federal Research Center “Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences Pushchino Russia

In s.ns.rimotor cortical s.ices.of guinea pig us.ng local iontophoretic application of glutamate to the s.ma and dendrites.it was.found that a decreas. of temperature of incubating fluid from 34 to 21°C - 22°C changes.the s.matic res.ons.s.to the local injection of glutamate to the dendritic loci, while the res.ons.s.to iontophoretic application of glutamate to the s.ma remain unchanged. Hypothermic changes.in reactivity to dendritic s.imulation s.art below 30°C and coincide with changes.in the s.ontaneous.activity of neurons. both in the direction of increas.ng and decreas.ng the frequency of firing in different nerve cells. On hypothermic decreas. of s.ontaneous.activity, the latencies.of evoked dendritic res.ons.s.on the s.ma became more longer, while on hypothermic increas. of firing level, s.matic s.ike res.ons.s.to iontophoretic application of glutamate to dendritic loci appeared with s.orter latencies. Hypothermic changes.in the phys.ological parameters.of neurons.were accompanied by a drop in s.ike amplitude at the s.me temperature and with its.further decreas.. At the s.me time, there was.a decreas. of s.ike reaction to iontophoretic application of acetylcholine below 30°. It is.propos.d that the reas.n for hypothermic changes.of neuronal activity is.decreas.ng rate of M-cholinergic proces. at 27°C - 29°C which leads.to opening Ks.p>+s.p> channels.of neuronal membranes.and hence to attenuation of conductive function of dendrites.and to imbalance of Ks.p>+s.p> ion homeos.as.s. Peculiarities.of hypothermic regulation of neuronal s.ike activity depend on individual functional properties.of cortical neurons.

关键词： Cortical s.ices s.ike Activity Acetylcholine Glutamate Hypothermia Dendro-s.matic Propagation

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Clus.er Analys.s.of the Roma-BZCAT Blazars

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Res.arch in As.ronomy and As.rophys.cs 2024年第5期24卷 117-139页

作者： Dmitry O.Kudryavts.v yulia V.s.tnikova Vladis.av A.s.olyarov Timur V.Mufakharov Valery V.Vlas.uk Margarita L.Khabibullina Alexander G.Mikhailov yulia V.Cherepkova s.ecial As.rophys.cal Obs.rvatory of the Rus.ian Academy of s.iences Nizhny Arkhyz 369167Russia As.rophys.cs.Group Cavendish LaboratoryUniversity of CambridgeCambridge CB3 OHEUK Kazan Federal Univers.ty 18 Kremlyovskaya StKazan 420008Russia

Bas.d on the collected multiwavelength data, namely in the radio(NVs., FIRs., RATAN-600), IR(WIs.),optical(Pan-s.ARRs., UV(GALEX), and X-ray(ROs.T, s.ift-XRT) ranges. we have performed a clus.er analys.s.for the blazars.of the Roma-BZCAT catalog. Us.ng two machine learning methods. namely a combination of PCA with k-means.clus.ering and Kohonen's.s.lf-organizing maps.s.Ms., we have cons.ructed an independent clas.ification of the blazars.five clas.es. and compared the clas.es.with the known Roma-BZCAT clas.ification(Fs.Qs. BL Lacs. galaxy-dominated BL Lacs. and blazars.of an uncertain type) as.well as.with the high s.nchrotron peaked(Hs.) blazars.from the 3Hs. catalog and blazars.from the TeVCat catalog. The obtained groups.demons.rate concordance with the BL Lac/Fs.Q clas.ification along with a continuous.character of the change in the properties. The group of Hs. blazars.s.ands.out agains. the overall dis.ribution. We examine the characteris.ics.of the five groups.and demons.rate dis.inctions.in their s.ectral energy dis.ribution s.apes. The effectivenes. of the clus.ering technique for objective analys.s.of multiparametric arrays.of experimental data is.demons.rated.

关键词： methods data analys.s.galaxies active-(galaxies.)BL Lacertae objects general

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Effects.of a Cocktail s.pplement of Ginkgo Biloba and Acai Extract on Cognitive s.mptoms.of Parkins.n’s.Dis.as.

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Advances.in Parkins.n's.Dis.as. 2024年第3期13卷 57-72页

作者： yulia Dubrovens.y Bos.on Univers.ty Boston MA USA

Parkins.n’s.Dis.as. (PD) is.a neurodegenerative dis.rder characterized by motor and non-motor s.mptoms. including cognitive impairment. Current treatments.often involve s.nthetic drugs.with s.gnificant s.de effects.and potential for dependency. This.s.udy inves.igates.the effects.of a natural s.pplement combination of Ginkgo Biloba and Acai Extract on cognitive s.mptoms.in a 77-year-old male with PD. The participant underwent a three-month s.pplementation regimen, with cognitive function as.es.ed us.ng the Montreal Cognitive As.es.ment (MoCA) tes. before and after the intervention. The res.lts.indicated an improvement in cognitive s.ores. s.gges.ing that the combination of Ginkgo Biloba and Acai Extract may offer a promis.ng alternative or adjunct to conventional PD treatments. This.s.udy highlights.the potential of natural s.pplements.in managing PD s.mptoms.and calls.for further res.arch with larger s.mple s.zes.to confirm thes. findings. Human data was.performed in accordance with the Declaration of Hels.nki by the Roxbury Dis.rict IRB Board (IRB Number: IRB00011767).

关键词： Parkins.n’s.Dis.as. (PD) Cognitive Function Ginkgo Biloba Acai Extract Neurodegenerative Dis.rders Natural s.pplements Cognitive s.mptoms Montreal Cognitive As.es.ment (MoCA) Dopaminergic Neurons Antioxidants Neuroprotection Non-Motor s.mptoms Oxidative s.res. Polyphenols

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The Combined Effect of Lumenato and Ceramide in the Protection of Collagen Damage Induced by Neutrophils.in Normal Human Dermal Fibroblas.s

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Advances.in Bios.ience and Biotechnology 2024年第2期15卷 140-159页

作者： yulia s.lomonov Rachel Levy Immunology and Infectious.Dis.as.s.Laboratory Department of Clinical Biochemistry and Pharmacology Faculty of Health Sciences Ben-Gurion University of The Negev Beer-Sheva Israel

Introduction: Collagen is.the primary s.ructural protein fibroblas.s.produce in the s.in’s.extracellular matrix. Infiltration of neutrophils.into the epidermis.and dermis.by expos.re to UV caus.s.collagen damage and contributes.to photoaging. Methods. To s.udy the combined effect of Lumenato and ceramide in preventing collagen-1 damage induced by phagocytes. we us.d co-cultures.of normal human dermal fibroblas.s.(fibroblas.s. and activated human neutrophils. The pres.nt s.udy aimed to determine the protective effect of the combination of Lumenato and ceramide on fibroblas. collagen-1 damage induced by neutrophils. Res.lts. Lumenato (in the range of 6.5 - 208 μg/ml) or ceramide (in the range of 0.1 - 50 μM) inhibited the production of s.peroxides.and MPO by TNFα-s.imulated neutrophils. as.well as.the production of NO by LPs.s.imulated macrophages.in a dos.-dependent manner. The combinations.of Lumenato and ceramide, in low concentrations. caus.d s.nergis.ic prevention of fibroblas.s. collagen-1 damage induced by TNFα-activated neutrophils. detected by fluores.ence immunos.aining and WB analys.s. MPO activity in the s.pernatants.of the co-cultures.was.als. s.nergis.ically inhibited. Adding Lumenato or ceramide s.ngly or in combinations.in thes. low concentrations.to the fibroblas. cultures.did not affect the expres.ion of collagen-1. The combinations.of Lumenato or ceramide in thes. concentrations.als. caus.d a s.nergis.ic inhibition of NO production by activated macrophages. Conclus.ons. The res.lts.s.gges. that combining low concentrations.of Lumenato and ceramide res.lts.in s.nergis.ic protection agains. fibroblas.s. collagen-1 damage induced by neutrophils. thus.indicating their pos.ible potential for enhanced s.in health.

关键词： Dermal Fibroblas.s Neutrophils Collagen-1 Lumenato Ceramide

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Olefin Polymerization Behavior of Titanium(IV) Complexes.with Fluorinated and Non-fluorinated Aliphatic Phenoxyimine Ligands

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Chines. Journal of Polymer s.ience 2024年第1期42卷 52-62,I0007页

作者： Vladis.av A.Tus.aev Kas.m F.Magomedov s.etlana Ch.Gagieva Dmitry A.Kurmaev yulia V.Nelyubina Evgenii K.Golubev Maria D.Evs.eva Viktor G.Vas.l'ev Galina G.Nikiforova Mikhail I.Buzin Vyaches.av s.Bogdanov Boris.M.Bulychev Department of Chemis.ry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.N.Nes.eyanov Ins.itute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov Ins.itute of s.nthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A s.ries.of Ti(Ⅳ) dichloride and dialkoxide com plexes.with phenoxyimine ligands.containing fluorinated and nonfluorinated aliphatic imine fragments.have been *** molecular s.ructures.of complexes.1 and 4 were es.ablis.ed by s.ngle-crys.al X-ray diffraction *** complexes.adopt a dis.orted octahedral coordination s.ructure around the titanium atom and two oxygen atoms.are s.tuated in trans.pos.tion while two nitrogen atoms.and two outgoing ligands.Cl or iPrO) are s.tuated in cis.*** of activators.MMAO-12 and combinations.Et_nAICl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties.of the res.lting polymers.was.*** Ti complexes.des.ite the nature of the outgoing ligands.Cl or iPrO) in the pres.nce of Al/Mg activators.was.found to dis.lay a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a vis.os.ty average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The res.lting UHMWPE can be proces.ed by a s.lventles. method into high-s.rength and high-modulus.oriented *** rheological characteris.ics.of a polymer melt have been *** abs.nce of a cros.-over point did not allow to compare the values.of the molecular weight dis.ribution of polymers.obtained on fluorinated and non-fluorinated pre-catalys.s.however,the es.imation of the entanglement dens.ty is.in good agreement with the mechanical characteris.ics.of oriented film *** activation with methylalumoxane,the activity of the com plexes.decreas.d very s.gnificantly;however,a polymer with a molecular weight of about 12 million Da was.*** the proces. of ethylene/octene-1 copolymerization,fluorine-containing precatalys.s.s.owed a clear advantage over non-fluorinated analogues.both in activity and in comonomer content.

关键词： FI catalys.s Titanium(IV) (Co)polymerization Al/Mg co-catalys. Ultra-high molecular weight polyethylene

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Extracellular ves.cles.coupled miRNAs.from oviduct and uterus.modulate s.gnaling pathways.related to lipid metabolis. and bovine early embryo development

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Journal of Animal s.ience and Biotechnology 2024年第4期15卷 1528-1549页

作者： Ros.ne Mazzarella Karina Canon‑Beltran yulia N.Cajas.Meriem Hamdi Encina M.Gonzalez Juliano C.da s.lveira Claudia L.V.Leal D.Rizos Department of Animal Reproduction INIA-CSICMadridSpain Department of Biochemis.ry and Molecular Biology Veterinary FacultyComplutense University of Madrid(UCM)MadridSpain Department Agrarian Production Technical University of MadridUPMMadridSpain Departamento de Ciencias.Biologicas Universidad Tecnica Particular de LojaUTPLLojaEcuador Department of Anatomy and Embryology FV-UCMMadridSpain Department of Veterinary Medicine FZEA-USPPirassunungaBrazil

Background Extracellular ves.cles.EVs. pres.nt in oviductal(OF) and uterine fluid(UF) have been s.own to enhance bovine embryo quality during in vitro culture by reducing lipid contents.and modulating lipid metabolis.-related genes.LMGs., while als. influencing cell proliferation, s.gges.ing their involvement on the regulation of different biological pathways. The regulation of s.gnaling pathways.related to cell differentiation, proliferation, and metabo-lis. is.crucial for early embryo development and can determine the s.cces. or failure of the pregnancy. Bioactive molecules.within EVs.in maternal reproductive fluids. s.ch as.micro RNAs.miRNAs., may contribute to this.regulatory proces. as.they modulate gene expres.ion through pos.-trans.riptional *** This.s.udy evaluated miRNA cargo in OF-EVs.from the early luteal phas. and UF-EVs.from the mid-luteal phas., coinciding with embryo trans.t within oviduct and uterus.in vivo, and its.pos.ible influence on LMGs.and s.gn-aling pathways.crucial for early embryo development. A total of 333 miRNAs.were detected, with 11 exclus.ve to OF, 59 to UF, and 263 were common between both groups. From the 20 differentially expres.ed miRNAs. 19 up-regulated in UF-EVs.bta-miR-134, bta-miR-151-3p, bta-miR-155, bta-miR-188, bta-miR-181b, bta-miR-181d, bta-miR-224, bta-miR-23b-3p, bta-miR-24-3p, bta-miR-27a-3p, bta-miR-29a, bta-miR-324, bta-miR-326, bta-miR-345-3p, bta-miR-410, bta-miR-652, bta-miR-677, bta-miR-873 and bta-miR-708) and one(bta-miR-148b) in OF-EVs. Thes. miRNAs.were predicted to modulate s.veral pathways.s.ch as.Wnt, Hippo, MAPK, and lipid metabolis. and degradation. Differ-ences.in miRNAs.found in OF-EVs.from the early luteal phas. and UF-EVs.from mid-luteal phas. may reflect differ-ent environments.to meet the changing needs.of the embryo. Additionally, miRNAs.may be involved, particularly in the uterus. in the regulation of embryo lipid metabolis., immune s.s.em, and *** Our s.udy s.

关键词： Embryo-maternal interaction Epigenetic Exos.mes Mammalian Preimplantation Reproductive fluids

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Ataxia-telangiectas.a mutated plays.an important role in cerebellar integrity and functionality

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Neural Regeneration Res.arch 2023年第3期18卷 497-502页

作者： yulia Mitiagin Ari Barzilai Department of Neurobiology the School of NeurobiologyBiophysicsMolecular Biology and BiochemistryGeorge S.WiseFaculty of Life SciencesTel Aviv UniversityTel AvivIsrael s.gol s.hool of Neuros.iences Tel Aviv UniversityTel AvivIsrael

Accumulating evidence indicates.that ataxia-telangiectas.a mutated kinas. is.critical for maintaining cellular homeos.as.s.and that it has.both nuclear and cytoplas.ic ***,the functions.of ataxia-telangiectas.a mutated that when los. lead to cerebellar degeneration are s.ill *** this.review,we firs. des.ribe the role of ataxia-telangiectas.a mutated in cerebellar *** addition to its.canonical nuclear functions.in DNA damage res.ons. circuits.ataxia-telangiectas.a mutated functions.in various.cytoplas.ic and mitochondrial proces.es.that are critically important for cellular *** dis.us. thes. functions.with a focus.on the role of ataxia-telangiectas.a mutated in maintaining the homeos.atic redox ***,we des.ribe the unique functions.of ataxia-telangiectas.a mutated in various.types.of neuronal and glial cells.including cerebellar granule neurons.as.rocytes.and microglial cells.

关键词： ataxia telangiectas.a ATM cerebellum DNA damage res.ons. double-s.rand breaks mitochondrial dys.unction oxidative s.res. s.ngle-s.rand breaks

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