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  1. Article ; Online: Novel Strategies for Preventing Dysbiosis in the Oral Cavity.

    Rebelo, Mariana B / Oliveira, Cláudia S / Tavaria, Freni K

    Frontiers in bioscience (Elite edition)

    2024  Volume 15, Issue 4, Page(s) 23

    Abstract: Oral diseases affect over three billion people worldwide, making it one of the most common infections. Recent studies show that one approach to reducing the risk of chronic infections, such as caries, gingivitis, periodontitis, and halitosis, is to ... ...

    Abstract Oral diseases affect over three billion people worldwide, making it one of the most common infections. Recent studies show that one approach to reducing the risk of chronic infections, such as caries, gingivitis, periodontitis, and halitosis, is to control the ecology of the oral microbiome instead of completely removing both the harmful and beneficial microorganisms. This is based on the knowledge that oral diseases are not caused by a single pathogen but rather by a shift in the homeostasis of the entire microbiota, a process known as dysbiosis. Consequently, it is of the utmost importance to implement strategies that are able to prevent and control oral dysbiosis to avoid serious complications, including heart, lung, and other systemic diseases. Conventional treatments include the use of antibiotics, which further disrupt the equilibrium in the oral microbiota, together with the mechanical removal of the decayed cavity area following its formation. Therefore, it is imperative to implement alternative strategies with the potential to overcome the disadvantages of the current therapy, namely, the use of broad-spectrum antibiotics. In this sense, probiotics and postbiotics have received particular attention since they can modulate the oral microbiota and decrease the dysbiotic rate in the oral cavity. However, their mechanisms of action need to be addressed to clarify and drive their possible applications as preventive strategies. In this sense, this review provides an overview of the potential of probiotics and postbiotics, focusing on their antimicrobial and antibiofilm activities as well as their ability to modulate the inflammatory response. Finally, it also showcases the main advantages and disadvantages of orodispersible films-a promising delivery mechanism for both probiotics and postbiotics to target oral dysbiosis.
    MeSH term(s) Humans ; Dysbiosis/prevention & control ; Periodontitis ; Microbiota/physiology ; Anti-Bacterial Agents/therapeutic use
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2024-01-02
    Publishing country Singapore
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 2565080-4
    ISSN 1945-0508 ; 1945-0494
    ISSN (online) 1945-0508
    ISSN 1945-0494
    DOI 10.31083/j.fbe1504023
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Enhancing the authenticity of animal by-products: harmonization of DNA extraction methods from novel ingredients.

    Filipa-Silva, Andreia / Castro, Raquel / Rebelo, Mariana / Mota, Maria J / Almeida, André / Valente, Luísa M P / Gomes, Sónia

    Frontiers in chemistry

    2024  Volume 12, Page(s) 1350433

    Abstract: Introduction: ...

    Abstract Introduction:
    Language English
    Publishing date 2024-02-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2024.1350433
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Single neurons in the thalamus and subthalamic nucleus process cardiac and respiratory signals in humans.

    De Falco, Emanuela / Solcà, Marco / Bernasconi, Fosco / Babo-Rebelo, Mariana / Young, Nicole / Sammartino, Francesco / Tallon-Baudry, Catherine / Navarro, Vincent / Rezai, Ali R / Krishna, Vibhor / Blanke, Olaf

    Proceedings of the National Academy of Sciences of the United States of America

    2024  Volume 121, Issue 11, Page(s) e2316365121

    Abstract: Visceral signals are constantly processed by our central nervous system, enable homeostatic regulation, and influence perception, emotion, and cognition. While visceral processes at the cortical level have been extensively studied using non-invasive ... ...

    Abstract Visceral signals are constantly processed by our central nervous system, enable homeostatic regulation, and influence perception, emotion, and cognition. While visceral processes at the cortical level have been extensively studied using non-invasive imaging techniques, very few studies have investigated how this information is processed at the single neuron level, both in humans and animals. Subcortical regions, relaying signals from peripheral interoceptors to cortical structures, are particularly understudied and how visceral information is processed in thalamic and subthalamic structures remains largely unknown. Here, we took advantage of intraoperative microelectrode recordings in patients undergoing surgery for deep brain stimulation (DBS) to investigate the activity of single neurons related to cardiac and respiratory functions in three subcortical regions: ventral intermedius nucleus (Vim) and ventral caudalis nucleus (Vc) of the thalamus, and subthalamic nucleus (STN). We report that the activity of a large portion of the recorded neurons (about 70%) was modulated by either the heartbeat, the cardiac inter-beat interval, or the respiration. These cardiac and respiratory response patterns varied largely across neurons both in terms of timing and their kind of modulation. A substantial proportion of these visceral neurons (30%) was responsive to more than one of the tested signals, underlining specialization and integration of cardiac and respiratory signals in STN and thalamic neurons. By extensively describing single unit activity related to cardiorespiratory function in thalamic and subthalamic neurons, our results highlight the major role of these subcortical regions in the processing of visceral signals.
    MeSH term(s) Animals ; Humans ; Subthalamic Nucleus ; Thalamus/physiology ; Neurons/physiology ; Microelectrodes ; Deep Brain Stimulation
    Language English
    Publishing date 2024-03-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2316365121
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Neural responses to heartbeats distinguish self from other during imagination.

    Babo-Rebelo, Mariana / Buot, Anne / Tallon-Baudry, Catherine

    NeuroImage

    2019  Volume 191, Page(s) 10–20

    Abstract: Imagination is an internally-generated process, where one can make oneself or other people appear as protagonists of a scene. How does the brain tag the protagonist of an imagined scene as being oneself or someone else? Crucially, during imagination, ... ...

    Abstract Imagination is an internally-generated process, where one can make oneself or other people appear as protagonists of a scene. How does the brain tag the protagonist of an imagined scene as being oneself or someone else? Crucially, during imagination, neither external stimuli nor motor feedback are available to disentangle imagining oneself from imagining someone else. Here, we test the hypothesis that an internal mechanism based on the neural monitoring of heartbeats could distinguish between self and other. 23 participants imagined themselves (from a first-person perspective) or a friend (from a third-person perspective) in various scenarios, while their brain activity was recorded with magnetoencephalography and their cardiac activity was simultaneously monitored. We measured heartbeat-evoked responses, i.e. transients of neural activity occurring in response to each heartbeat, during imagination. The amplitude of heartbeat-evoked responses differed between imagining oneself and imagining a friend, in the precuneus and posterior cingulate regions bilaterally. Effect size was modulated by the daydreaming frequency scores of participants but not by their interoceptive abilities. These results could not be accounted for by other characteristics of imagination (e.g., the ability to adopt the perspective, valence or arousal), nor by cardiac parameters (e.g., heart rate) or arousal levels (e.g. arousal ratings, pupil diameter). Heartbeat-evoked responses thus appear as a neural marker distinguishing self from other during imagination.
    MeSH term(s) Adult ; Brain/physiology ; Female ; Heart Rate/physiology ; Humans ; Imagination/physiology ; Male ; Self Concept
    Language English
    Publishing date 2019-02-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1147767-2
    ISSN 1095-9572 ; 1053-8119
    ISSN (online) 1095-9572
    ISSN 1053-8119
    DOI 10.1016/j.neuroimage.2019.02.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Aesthetic experience enhances first-person spatial representation.

    Babo-Rebelo, Mariana / Chatel, Marie / Tabacchi, Serena / Namiq, Allen / Travers, Eoin / James, Kadine / Haggard, Patrick

    Proceedings of the National Academy of Sciences of the United States of America

    2022  Volume 119, Issue 43, Page(s) e2201540119

    Abstract: Episodic autobiographical memories are characterized by a spatial context and an affective component. But how do affective and spatial aspects interact? Does affect modulate the way we encode the spatial context of events? We investigated how one element ...

    Abstract Episodic autobiographical memories are characterized by a spatial context and an affective component. But how do affective and spatial aspects interact? Does affect modulate the way we encode the spatial context of events? We investigated how one element of affect, namely aesthetic liking, modulates memory for location, in three online experiments (
    MeSH term(s) Emotions ; Esthetics ; Humans ; Memory, Episodic ; Mental Recall ; Museums
    Language English
    Publishing date 2022-10-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2201540119
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Characterization of Portuguese thermo-mineral waters to be applied in peloids maturation

    Rebelo, Mariana / da Silva, Eduardo Ferreira / Rocha, Fernando

    Environmental earth sciences. 2015 Mar., v. 73, no. 6

    2015  

    Abstract: Portugal has an old tradition of using thermo-mineral waters for thermal treatments. Near mineral water springs, traditional applications are made using clays mixed with mineral waters gushing up “in situ”, which are employed for the treatment of skin ... ...

    Abstract Portugal has an old tradition of using thermo-mineral waters for thermal treatments. Near mineral water springs, traditional applications are made using clays mixed with mineral waters gushing up “in situ”, which are employed for the treatment of skin and musculoskeletal disorders. Our research team has found that some of the studied Portuguese clays (and similar formations) have compositional and physico-chemical properties that partially explain their therapeutic qualities. In what concerns Portuguese mineral waters, only a few studies were made trying to characterize and better understand their beneficial effects on human health, when mixed with clays. In fact, the therapeutic efficiency of the obtained thermal products depends on the geochemistry of the mixed clay-mineral water peloid. In this study, a total of 28 thermo-mineral water samples were collected from springs/boreholes located at Portuguese spas or traditional healing baths. The aim of this study was the geochemical characterization of collected water samples, in order to select the most suitable thermo-mineral water samples, reduce the lack of information about the trace/hazardous elements and, also, contribute towards the revitalization of Portuguese thermalism. Results show a large range of chemical characteristics and diverse water types. Temperature, electrical conductivity and pH values are variable among samples. Different hydrochemical water types were obtained from Hill–Piper diagrams. In terms of potential application for maturation, we selected three Ca–SO₄(T1, H1 and H2) and two Na–HCO₃(T14 and T15) water samples as best candidates to produce desirable therapeutic effects on peloids.
    Keywords electrical conductivity ; geochemistry ; heat treatment ; human health ; musculoskeletal diseases ; pH ; springs (water) ; temperature ; therapeutics ; Portugal
    Language English
    Dates of publication 2015-03
    Size p. 2843-2862.
    Publishing place Springer-Verlag
    Document type Article
    ZDB-ID 2493699-6
    ISSN 1866-6299 ; 1866-6280
    ISSN (online) 1866-6299
    ISSN 1866-6280
    DOI 10.1007/s12665-014-3670-2
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Neural Responses to Heartbeats in the Default Network Encode the Self in Spontaneous Thoughts.

    Babo-Rebelo, Mariana / Richter, Craig G / Tallon-Baudry, Catherine

    The Journal of neuroscience : the official journal of the Society for Neuroscience

    2016  Volume 36, Issue 30, Page(s) 7829–7840

    Abstract: Unlabelled: The default network (DN) has been consistently associated with self-related cognition, but also to bodily state monitoring and autonomic regulation. We hypothesized that these two seemingly disparate functional roles of the DN are ... ...

    Abstract Unlabelled: The default network (DN) has been consistently associated with self-related cognition, but also to bodily state monitoring and autonomic regulation. We hypothesized that these two seemingly disparate functional roles of the DN are functionally coupled, in line with theories proposing that selfhood is grounded in the neural monitoring of internal organs, such as the heart. We measured with magnetoencephalograhy neural responses evoked by heartbeats while human participants freely mind-wandered. When interrupted by a visual stimulus at random intervals, participants scored the self-relatedness of the interrupted thought. They evaluated their involvement as the first-person perspective subject or agent in the thought ("I"), and on another scale to what degree they were thinking about themselves ("Me"). During the interrupted thought, neural responses to heartbeats in two regions of the DN, the ventral precuneus and the ventromedial prefrontal cortex, covaried, respectively, with the "I" and the "Me" dimensions of the self, even at the single-trial level. No covariation between self-relatedness and peripheral autonomic measures (heart rate, heart rate variability, pupil diameter, electrodermal activity, respiration rate, and phase) or alpha power was observed. Our results reveal a direct link between selfhood and neural responses to heartbeats in the DN and thus directly support theories grounding selfhood in the neural monitoring of visceral inputs. More generally, the tight functional coupling between self-related processing and cardiac monitoring observed here implies that, even in the absence of measured changes in peripheral bodily measures, physiological and cognitive functions have to be considered jointly in the DN.
    Significance statement: The default network (DN) has been consistently associated with self-processing but also with autonomic regulation. We hypothesized that these two functions could be functionally coupled in the DN, inspired by theories according to which selfhood is grounded in the neural monitoring of internal organs. Using magnetoencephalography, we show that heartbeat-evoked responses (HERs) in the DN covary with the self-relatedness of ongoing spontaneous thoughts. HER amplitude in the ventral precuneus covaried with the "I" self-dimension, whereas HER amplitude in the ventromedial prefrontal cortex encoded the "Me" self-dimension. Our experimental results directly support theories rooting selfhood in the neural monitoring of internal organs. We propose a novel functional framework for the DN, where self-processing is coupled with physiological monitoring.
    MeSH term(s) Adult ; Attention/physiology ; Autonomic Nervous System/physiology ; Cognition/physiology ; Feedback, Physiological/physiology ; Female ; Heart Rate/physiology ; Humans ; Male ; Nerve Net/physiology ; Prefrontal Cortex/physiology ; Thinking/physiology
    Language English
    Publishing date 2016-07-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604637-x
    ISSN 1529-2401 ; 0270-6474
    ISSN (online) 1529-2401
    ISSN 0270-6474
    DOI 10.1523/JNEUROSCI.0262-16.2016
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: The neural monitoring of visceral inputs, rather than attention, accounts for first-person perspective in conscious vision.

    Tallon-Baudry, Catherine / Campana, Florence / Park, Hyeong-Dong / Babo-Rebelo, Mariana

    Cortex; a journal devoted to the study of the nervous system and behavior

    2017  Volume 102, Page(s) 139–149

    Abstract: Why should a scientist whose aim is to unravel the neural mechanisms of perception consider brain-body interactions seriously? Brain-body interactions have traditionally been associated with emotion, effort, or stress, but not with the "cold" processes ... ...

    Abstract Why should a scientist whose aim is to unravel the neural mechanisms of perception consider brain-body interactions seriously? Brain-body interactions have traditionally been associated with emotion, effort, or stress, but not with the "cold" processes of perception and attention. Here, we review recent experimental evidence suggesting a different picture: the neural monitoring of bodily state, and in particular the neural monitoring of the heart, affects visual perception. The impact of spontaneous fluctuations of neural responses to heartbeats on visual detection is as large as the impact of explicit manipulations of spatial attention in perceptual tasks. However, we propose that the neural monitoring of visceral inputs plays a specific role in conscious perception, distinct from the role of attention. The neural monitoring of organs such as the heart or the gut would generate a subject-centered reference frame, from which the first-person perspective inherent to conscious perception can develop. In this view, conscious perception results from the integration of visual content with first-person perspective.
    MeSH term(s) Attention/physiology ; Brain/physiology ; Brain Mapping ; Consciousness/physiology ; Humans ; Perception/physiology ; Visual Perception/physiology
    Language English
    Publishing date 2017-06-03
    Publishing country Italy
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 280622-8
    ISSN 1973-8102 ; 0010-9452
    ISSN (online) 1973-8102
    ISSN 0010-9452
    DOI 10.1016/j.cortex.2017.05.019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Is the cardiac monitoring function related to the self in both the default network and right anterior insula?

    Babo-Rebelo, Mariana / Wolpert, Nicolai / Adam, Claude / Hasboun, Dominique / Tallon-Baudry, Catherine

    Philosophical transactions of the Royal Society of London. Series B, Biological sciences

    2016  Volume 371, Issue 1708

    Abstract: The self has been proposed to be rooted in the neural monitoring of internal bodily signals and might thus involve interoceptive areas, notably the right anterior insula (rAI). However, studies on the self consistently showed the involvement of midline ... ...

    Abstract The self has been proposed to be rooted in the neural monitoring of internal bodily signals and might thus involve interoceptive areas, notably the right anterior insula (rAI). However, studies on the self consistently showed the involvement of midline default network (DN) nodes, without referring to visceral monitoring. Here, we investigate this apparent discrepancy. We previously showed that neural responses to heartbeats in the DN encode two different self-dimensions, the agentive 'I' and the introspective 'Me', in a whole-brain analysis of magnetoencephalography (MEG) data. Here, we confirm and anatomically refine this result with intracranial recordings (intracranial electroencephalography, iEEG). In two patients, we show a parametric modulation of neural responses to heartbeats by the self-relatedness of thoughts, at the single trial level. A region-of-interest analysis of the insula reveals that MEG responses to heartbeats in the rAI encode the 'I' self-dimension. The effect in rAI was weaker than in the DN and was replicated in iEEG data in one patient out of two. We propose that a common mechanism, the neural monitoring of cardiac signals, underlies the self in both the DN and rAI. This might reconcile studies on the self highlighting the DN, with studies on interoception focusing on the insula.This article is part of the themed issue 'Interoception beyond homeostasis: affect, cognition and mental health'.
    MeSH term(s) Adult ; Cerebral Cortex/physiology ; Cognition ; Electrocorticography ; Feedback, Physiological ; Female ; Heart Rate ; Humans ; Interoception ; Male ; Nerve Net ; Young Adult
    Language English
    Publishing date 2016-10-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208382-6
    ISSN 1471-2970 ; 0080-4622 ; 0264-3839 ; 0962-8436
    ISSN (online) 1471-2970
    ISSN 0080-4622 ; 0264-3839 ; 0962-8436
    DOI 10.1098/rstb.2016.0004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Phase-amplitude coupling at the organism level: The amplitude of spontaneous alpha rhythm fluctuations varies with the phase of the infra-slow gastric basal rhythm.

    Richter, Craig G / Babo-Rebelo, Mariana / Schwartz, Denis / Tallon-Baudry, Catherine

    NeuroImage

    2016  Volume 146, Page(s) 951–958

    Abstract: A fundamental feature of the temporal organization of neural activity is phase-amplitude coupling between brain rhythms at different frequencies, where the amplitude of a higher frequency varies according to the phase of a lower frequency. Here, we show ... ...

    Abstract A fundamental feature of the temporal organization of neural activity is phase-amplitude coupling between brain rhythms at different frequencies, where the amplitude of a higher frequency varies according to the phase of a lower frequency. Here, we show that this rule extends to brain-organ interactions. We measured both the infra-slow (~0.05Hz) rhythm intrinsically generated by the stomach - the gastric basal rhythm - using electrogastrography, and spontaneous brain dynamics with magnetoencephalography during resting-state with eyes open. We found significant phase-amplitude coupling between the infra-slow gastric phase and the amplitude of the cortical alpha rhythm (10-11Hz), with gastric phase accounting for 8% of the variance of alpha rhythm amplitude fluctuations. Gastric-alpha coupling was localized to the right anterior insula, and bilaterally to occipito-parietal regions. Transfer entropy, a measure of directionality of information transfer, indicates that gastric-alpha coupling is due to an ascending influence from the stomach to both the right anterior insula and occipito-parietal regions. Our results show that phase-amplitude coupling so far only observed within the brain extends to brain-viscera interactions. They further reveal that the temporal structure of spontaneous brain activity depends not only on neuron and network properties endogenous to the brain, but also on the slow electrical rhythm generated by the stomach.
    MeSH term(s) Adult ; Alpha Rhythm ; Brain/physiology ; Female ; Humans ; Magnetoencephalography ; Male ; Neural Pathways/physiology ; Stomach/innervation ; Stomach/physiology ; Young Adult
    Language English
    Publishing date 2016-08-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1147767-2
    ISSN 1095-9572 ; 1053-8119
    ISSN (online) 1095-9572
    ISSN 1053-8119
    DOI 10.1016/j.neuroimage.2016.08.043
    Database MEDical Literature Analysis and Retrieval System OnLINE

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