41 results on '"Despoti, A."'
Search Results
2. The Relationship Between Early Maladaptive Schemas and Cluster C Personality Disorder Traits: A Systematic Review and Meta-Analysis
- Author
-
Panagiotopoulos, Angelos, Despoti, Akylina, Varveri, Christina, Wiegand, Marie C. A., and Lobbestael, Jill
- Published
- 2023
- Full Text
- View/download PDF
3. Attitudes toward pre-symptomatic screening for Alzheimer’s dementia in five European countries: a comparison of family members of people with Alzheimer’s dementia versus non-family members
- Author
-
Ioanna A. Angelidou, Marina Makri, Konrad Beyreuther, Mercè Boada Rovira, Akyllina Despoti, Sebastiaan Engelborghs, Andrea Miguel, Isabel Rodríguez, Hannah Stocker, Joke Temmerman, Magda Tsolaki, Görsev Yener, Deniz Yerlikaya, and Birgit Teichmann
- Subjects
Alzheimer’s disease ,screening attitude ,perceived harms ,perceived benefits ,cultural differences ,Genetics ,QH426-470 - Abstract
Introduction: Pre-symptomatic screening is getting more attention in healthcare as it detects the risk for developing neurodegenerative diseases like Alzheimer’s disease (AD), which is very useful for treatment or prevention. AD screening could play an important role in individuals with at least one affected first-degree relative, but also without family history. As the demand for screening is rising worldwide, it is important to consider possible cross-cultural differences in attitudes toward pre-symptomatic screening in order to tailor healthcare services to the needs of each country.Objective: This study aims to investigate the attitudes of family members and non-family members of people with dementia toward pre-symptomatic screening and explore possible differences in attitudes across five European countries (Belgium, Germany, Greece, Spain, Turkey) using translated versions of the “Perceptions regarding pRE-symptomatic Alzheimer’s Disease Screening” questionnaire (PRE-ADS).Methods: The multicultural sample (N = 650) was recruited from samples that were previously used in validation studies of the translated PRE-ADS versions. The subscale “Acceptability of Screening”, consisting of five PRE-ADS items to specifically explore willingness to undergo screening, was created. Ιnternal consistency was measured, and structural validity was determined using Confirmatory Factor Analysis (CFA). Group comparisons were performed to investigate differences in attitudes toward pre-symptomatic AD screening regarding family history and country of origin using the PRE-ADS and the “Acceptability of Screening” mean scores.Results: Construct validity was acceptable for the PRE-ADS. Both the PRE-ADS (α = 0.76) and its subscale “Acceptability of Screening” (α = 0.90) had good internal consistency. Overall, 56.9% of the total sample expressed a positive intention toward pre-symptomatic AD screening. T-tests showed significantly higher mean scores of participants with an affected family member. An international comparison revealed differences in the “Acceptability of Screening” mean score across the five European countries. No cross-cultural differences were found for the PRE-ADS mean score after adjusting for confounding variables.Conclusion: The PRE-ADS and its subscale are reliable tools for assessing pre-symptomatic AD screening attitudes. Variations in the acceptability of screening seem to be linked to family history and cultural influences. Further research with larger samples is needed to explore underlying relationships.
- Published
- 2023
- Full Text
- View/download PDF
4. Bullying, Victimization, and Psychopathy in Early Adolescents: The Moderating Role of Social Support
- Author
-
Despoti, Georgia, Kokkinos, Constantinos M., and Fanti, Kostas A.
- Abstract
The purpose of this study was to explore the potential moderating role of perceived social support (school personnel, friends) and gender in the association between distinct psychopathic traits (callous-unemotional traits, narcissism, impulsivity) with bullying and victimization among 1442 Greek speaking early adolescents. Results suggested that all psychopathic traits were significant risk factors of bullying, whereas only impulsivity was a significant risk factor of victimization. Importantly, narcissism was the stronger explanatory factor of bullying. In addition, school and friend perceived social support acted as protective factors from victimization. ?n addition, school and friend perceived social support moderated the link between narcissism and bullying. Specifically, narcissism was more strongly associated with bullying when school support was low and friend support was high. Finally, gender moderated the relationship only between narcissism and bullying, suggesting that the association between narcissism and bullying was stronger for boys compared to girls. Altogether, these findings highlight the importance of studying the influence of social context on youths with antisocial personality traits and their engagement in bullying and victimization. Findings might have implications for interventions aiming to reduce bullying and victimization.
- Published
- 2021
- Full Text
- View/download PDF
5. The Indirect Effects of Anger on Relational Aggression through Anger Rumination
- Author
-
Kokkinos, Constantinos M., Voulgaridou, Ioanna, and Despoti, Georgia
- Abstract
The current study investigated the indirect effects of anger on the four forms and functions of relational aggression (i.e., proactive indirect, proactive direct, reactive indirect, reactive direct) through anger rumination in a sample of 1020 Greek adolescents (504 boys). Males used more proactive direct and indirect relational aggression, whereas girls used more anger rumination. Structural equation modeling revealed that anger rumination mediated the link between anger and all forms and functions of relational aggression. Results highlight the importance of studying the impact of cognitive and emotional manifestations on youths' relational behavior. Theoretical and practical implications are discussed.
- Published
- 2021
- Full Text
- View/download PDF
6. Remote neuropsychological evaluation of older adults.
- Author
-
Tsiakiri, A., Koutzmpi, V., Megagianni, S., Toumaian, M., Geronikola, N., Despoti, A., Kanellopoulou, S., Arampatzi, X., Margioti, E., Davila, A., Zoi, P., Kalligerou, F., Liozidou, A., Tsapanou, A., and Sakka, P.
- Subjects
OLDER people ,NEUROPSYCHOLOGICAL tests ,ALZHEIMER'S disease ,MILD cognitive impairment ,DIAGNOSTIC services ,NEUROBEHAVIORAL disorders - Abstract
The use of technological means in the process of neuropsychological assessment has been proposed as a technique with promising results in the field of detection of neurocognitive disorders for community-dwelling older adults. Especially during the pandemic period due to COVID-19, telemedicine assumed to be vital in the field of early diagnosis of cognitive disorders and highlighted the clinical utility of remote methods of neuropsychological assessmentby video-conference. This descriptive study presents the development of a remote neuropsychological assessment protocol by selecting appropriate validated tests as part of a more comprehensive evaluation for older adults dwelling in the community. We recruited participants from the Athens Alzheimer's Association center in collaboration with the Hellenic Neuropsychological Society, in Athens, Greece, regarding the period between April 2020 and October 2021. 90 individuals, tested for the first time, were categorized into three groups according to their diagnosis which included: (a) Mild Cognitive Impairment (MCI), (b) Alzheimer's disease, (c) cognitively healthy older adults. The presented protocol outlines the main considerations of a framework about remote neuropsychological assessment, which can maximize the effectiveness of interventions and continuity regarding the care of older adults. The recommendations outlined in the presented protocol highlight strengths and limitations that should be taken into account in remote control procedures. Although the protocol was created in response to pandemic restrictions, tele-neuropsychology shows promise as a way to improve access opportunity to neurodiagnostic services for rural aging and underserved populations, which lack specialized healthcare services. Further application to different populations will add validity to the presented descriptive protocol. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
7. The effectiveness of immersive virtual reality in physical recovery of stroke patients: A systematic review
- Author
-
Irini Patsaki, Nefeli Dimitriadi, Akylina Despoti, Dimitra Tzoumi, Nikolaos Leventakis, Georgia Roussou, Argyro Papathanasiou, Serafeim Nanas, and Eleftherios Karatzanos
- Subjects
virtual reality ,immersive ,stroke ,physical rehabilitation ,functional ability ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
BackgroundOver the past few years, technological innovations have been increasingly employed to augment the rehabilitation of stroke patients. Virtual reality (VR) has gained attention through its ability to deliver a customized training session and to increase patients’ engagement. Virtual reality rehabilitation programs allow the patient to perform a therapeutic program tailored to his/her needs while interacting with a computer-simulated environment.PurposeThis study aims to investigate the effectiveness of a fully immersive rehabilitation program using a commercially available head-mounted display in stroke patients.MethodsA systematic search was conducted in three databases, namely, PubMed, Google Scholar, and PEDro. Four hundred thirty-two references were identified. The keywords used for the literature search were in English, which are given as follows: immersive, virtual reality, neurorehabilitation, stroke, and head-mounted display. Additionally, applicable articles were identified through screening reference lists of relevant articles.ResultsOnly 12 studies used head-mounted display for immersing the patient into the virtual world. Apart from the feasibility of this new technology, a range of benefits were identified, especially in terms of functional ability as measured by FIM or Barthel, the Action Research arm Test, Box and Block Test, Fugl-Meyer assessment of physical performance, strength, and balance outcomes.ConclusionThe results from this review support the potential beneficial effect of fully immersive virtual reality in the rehabilitation of stroke patients, maximizing recovery through increased motivation and adherence.
- Published
- 2022
- Full Text
- View/download PDF
8. Assessing the spatial distribution of five non-commercial fish species in the Aegean Sea (Greece, eastern Mediterranean Sea) based on discards data
- Author
-
Despoti, Smaragda, Stergiou, Konstantinos I., Machias, Athanassios, Vassilopoulou, Vassiliki, Tsagarakis, Konstantinos, Valavanis, Vasilis, Adamidou, Angeliki, and Giannoulaki, Marianna
- Published
- 2021
- Full Text
- View/download PDF
9. Effectiveness of remote neuropsychological interventions: A systematic review.
- Author
-
Despoti, Akyllina, Megari, Kalliopi, Tsiakiri, Anna, Toumaian, Maida, Koutzmpi, Vasiliki, Liozidou, Athanasia, and Tsapanou, Angeliki
- Subjects
- *
COVID-19 pandemic , *INFECTIOUS disease transmission , *NEUROLOGICAL disorders , *PATIENT care , *MENTAL illness , *HEALTH policy - Abstract
AbstractObjectiveMethodsResultsDiscussionRemote healthcare services is an upgrowing dynamic field that has been used to reduce potential disease spread and prevent overloading of the healthcare system during COVID-19 pandemic. The need for online interventions during the pandemic required immediate response with sometimes inadequate preparation. The aim of the present study is to investigate the effectiveness of remote healthcare services in the field of neuropsychological interventions.A systematic literature search was conducted in the electronic databases of PubMed, PsychINFO and Google Scholar. The main search terms were “remote neuropsychological intervention or training.” The included articles were RCT studies published in English, examining the effectiveness of remote healthcare services in neuropsychological interventions for adults with neurological disease diagnoses. Studies involving psychiatric disorders were excluded. Two reviewers assessed the quality of the studies and risk of bias using the PEDro Scale.A total of 10 studies with 2.221 participants were included. All studies concluded that remote healthcare intervention programs can be feasible, safe and effective in the rehabilitation process of neurological diseases.The present review demonstrated that the domains of neuropsychology have opportunities to forge ahead beyond traditional settings and have the ability to adapt to constantly changing environmental conditions with a view to providing patient care. Health policy plans should therefore be reformulated to include these needs in accordance with the social and cultural context of implementation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
10. SUITABILITY, USABILITY AND SAFETY OF FULLY IMMERSIVE VIRTUAL REALITY APPLICATIONS FOR MOTOR AND COGNITIVE REHABILITATION IN STROKE PATIENTS: PRELIMINARY DATA.
- Author
-
Roussou, Georgia, Despoti, Akyllina, Patsaki, Irini, Tzoumi, Dimitra, Leventakis, Nikolaos, Dimitriadi, Nefeli, Papathanasiou, Argyro, Alexandropoulou, Anna, Nanas, Serafeim, and Karatzanos, Eleftherios
- Subjects
VIRTUAL reality ,COGNITIVE rehabilitation ,STROKE patients ,MINI-Mental State Examination ,NEUROREHABILITATION - Abstract
Background: The use of immersive Virtual Reality (VR) in stroke rehabilitation appears to be promising for the improvement of motor and cognitive functions. Methods: The purpose of this pilot study was to investigate the suitability, usability and safety of VR applications that combine motor and cognitive training. Patients suffering from stroke in a subacute phase, and with Mini Mental State Examination (MMSE) ≥18/30, participated in the study. In the context of the REACT project, two IVR applications were designed and created, combining the use of motor and cognitive skills. Full immersion was achieved using the Head Mounted Display (HMD) Oculus Rift S. The intervention lasted for 4 weeks. The Suitability Evaluation Questionnaire (SEQ) was used for measurements. Values are expressed in the median (25th75th percentile). Results: Four patients [age: 64.5(61.0-69.5) years, gender:1 female / 3 male] in the 3rd -14th week of rehabilitation were finally included. Overall, the patient's SEQ score was 61(55-63). No adverse effects were reported, only one patient reported mild confusion 5.0(4.8-5.0) in one assessment. No differences were found in the comparison between first and second evaluation [61(58-62) vs 61(48- 64), p>0.05]. Conclusions: The primary results of this study show that the equipment is usable, safe, and suitable for use in the rehabilitation of patients with stroke in the early stages of rehabilitation. However, more large-scale studies are needed to investigate the validity and effects of VR applications in the neurorehabilitation of various disorders. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
11. Attitudes toward pre-symptomatic screening for Alzheimer’s dementia in five European countries: a comparison of family members of people with Alzheimer’s dementia versus non-family members
- Author
-
Angelidou, Ioanna A., primary, Makri, Marina, additional, Beyreuther, Konrad, additional, Boada Rovira, Mercè, additional, Despoti, Akyllina, additional, Engelborghs, Sebastiaan, additional, Miguel, Andrea, additional, Rodríguez, Isabel, additional, Stocker, Hannah, additional, Temmerman, Joke, additional, Tsolaki, Magda, additional, Yener, Görsev, additional, Yerlikaya, Deniz, additional, and Teichmann, Birgit, additional
- Published
- 2023
- Full Text
- View/download PDF
12. Caregivers and non‐caregivers attitudes regarding pre‐symptomatic Alzheimer’s disease testing
- Author
-
Makri, Marina, primary, Despoti, Akylina, additional, Gkioka, Mara, additional, and Tsolaki, Magda, additional
- Published
- 2023
- Full Text
- View/download PDF
13. Quantitative EEG as outcome measure of the therapeutic effects of transcranial pho-tobiomodulation: A systematic review
- Author
-
Eleni Magkouti, Nikos Leventakis, Anna Alexandropoulou, Akylina Despoti, and Serafim Nanas
- Subjects
low-level light therapy ,brain function ,Cultural Studies ,brain oscillations ,Religious studies ,Photobiomodulation therapy ,electroencephalogram ,cognitive impairment - Abstract
Background: Transcranial Photobiomodulation (t-PBM) is a current, innovative method that is used in the therapy of many neurological and psychological diseases. Its mechanisms of action have been investigated and the most well described ways of action are its effects on mitochondrial function and on heat/light-activated ion channels on neurons membrane. It has been suggested that the increase in cerebral blood flow and the alterations of membrane ion channels are the most dominant potential mechanisms that cause the effects of PBM on quantitative electroencephalography (qEEG), that some recent studies have reported. Aim: The aim of this review is to describe the effects that t-PBM has on brain oscillations, as these are measured by qEEG. Methods: The research was carried out in the Pubmed database and it included all studies that had been published until February 2022. Results: Overall, sixty-eight studies were located and considered, searching with the terms Photobiomodulation or Light Therapy or Near Infrared Light and EEG. Only eleven of them used Photobiomodulation in order to observe the effect it can have on human brain oscillations, measured by qEEG. Two studies reported the EEG alterations after t-PBM application on the hand instead of the head. Thus, nine studies were included in the review, which applied t-PBM and observed the alterations that it brought upon qEEG of healthy adults or patients with memory problems. Conclusion: The studies showed that t-PBM increases high frequency neural activity and inhibits low frequency oscillations. The studies varied a lot in the ways of light application and the parameters of the light itself, as well as on their study population.
- Published
- 2023
14. Can we gain new knowledge from the discarded fraction of the low-price commercial species of the bottom trawl fishery? An insight into the Eastern Mediterranean (Aegean Sea, Greece)
- Author
-
Despoti, Smaragda, primary, Stergiou, Konstantinos I., additional, Tserpes, George, additional, Tsagarakis, Konstantinos, additional, Vassilopoulou, Vassiliki, additional, Valavanis, Vasilis, additional, Adamidou, Angeliki, additional, and Giannoulaki, Marianna, additional
- Published
- 2023
- Full Text
- View/download PDF
15. Studying the Swallow using Surface Electroencephalography: A Systematic Review
- Author
-
Alexandropoulou, Anna, primary, Magkouti, Eleni, additional, Despoti, Akyllina, additional, Leventakis, Nikolaos, additional, and Nanas, Serafeim, additional
- Published
- 2023
- Full Text
- View/download PDF
16. Studying the Swallow using Surface Electroencephalography: A Systematic Review
- Author
-
Anna Alexandropoulou, Eleni Magkouti, Akyllina Despoti, Nikolaos Leventakis, and Serafeim Nanas
- Subjects
Cultural Studies ,Healthy ,Neural Response ,Religious studies ,Adults ,EEG ,Swallowing ,Deglutition - Abstract
Background: Swallowing is an important function for life sustenance but our understanding of its neural organization in the human cortex is not yet fully explored. Electroencephalography is a functional neuroimaging modality that already has and could further contribute to that direction. In this review, we have sought to gather and present findings from studies that used the EEG on healthy individuals for the investigation of the cortical mechanisms that moderate deglutition. Methods and Materials: Four databases were searched for studies that used the EEG as their main research modality on healthy individuals and administered various stimuli for them to swallow. The risk of bias assessment of the studies was conducted using the NIH rating scale for observational studies. Results: Our search yielded 393 studies in total and nine of them were included in the final discussion. The risk of bias assessment showed good quality of the studies. The nine studies were presented in a table following an adapted PICOS outline depicting the population, the comparisons, the means of measurement and the outcomes. Conclusions: Researchers studied the morphology of the signal before, during and after the swallow and its discrepancies in frequency in relation to stimuli alterations. Discrepancies in methodology and concordance with previous research are discussed.
- Published
- 2023
17. Attitudes of Family Members and Caregivers Regarding Alzheimer’s Disease Pre-Symptomatic Screening
- Author
-
Makri, Marina, Despoti, Akyllina, Teichmann, Birgit, Gkioka, Mara, Moraitou, Despina, Fidani, Liana, Tegos, Thomas, and Tsolaki, Magdalini
- Abstract
Background: In recent years, studies have examined the acceptability and attitudes that influence the intention to early screen for Alzheimer’s disease (AD) in the general population, older people, carers, and asymptomatic individuals who report a family history of AD. However, it remains unclear what specific factors promote or reduce the acceptability of pre-symptomatic screening.Objective: The aim of this study is to explore the attitudes of family and non-family members as well as caregivers and non-caregivers toward the pre-symptomatic screening of AD.Methods: A total of 213 participants completed the Perceptions regarding pRE-symptomatic Alzheimer’s Disease Screening (PRE-ADS) Questionnaire. Group comparisons using t-test and one-way ANOVA were used to examine differences in attitudes toward pre-symptomatic screening regarding age, family history, knowing someone with AD, influence of depression, and feelings of anxiety. The subscale “Acceptability of Screening” was developed to investigate the willingness to undergo pre-symptomatic screening.Results: Participants with a family history showed greater acceptance of pre-symptomatic screening while both caregivers and non-caregivers had similar attitudes. People with a family history as well as those with personal connections to dementia indicate a greater need for knowledge. The findings suggest that younger adults appear to perceive less harm from testing, whereas those who experience higher levels of anxiety and depression seem to perceive more testing harms.Conclusions: Comparing the attitudes of people with and without a family history as well as caregivers and non-caregivers toward pre-symptomatic screening of AD is critical to understand the differences between these groups and develop comprehensive screening programs.
- Published
- 2024
- Full Text
- View/download PDF
18. Quantitative EEG as outcome measure of the therapeutic effects of transcranial pho-tobiomodulation: A systematic review
- Author
-
Magkouti, Eleni, primary, Leventakis, Nikos, additional, Alexandropoulou, Anna, additional, Despoti, Akylina, additional, and Nanas, Serafim, additional
- Published
- 2023
- Full Text
- View/download PDF
19. The Indirect Effects of Anger on Relational Aggression through Anger Rumination
- Author
-
Georgia Despoti, Ioanna Voulgaridou, and Constantinos M. Kokkinos
- Subjects
Aggression ,media_common.quotation_subject ,Data_MISCELLANEOUS ,Rumination ,medicine ,Anger ,medicine.symptom ,Safety, Risk, Reliability and Quality ,Psychology ,Education ,media_common ,Developmental psychology - Abstract
The current study investigated the indirect effects of anger on the four forms and functions of relational aggression (i.e., proactive indirect, proactive direct, reactive indirect, reactive direct...
- Published
- 2021
20. The effectiveness of immersive virtual reality in physical recovery of stroke patients: A systematic review
- Author
-
Patsaki, Irini, primary, Dimitriadi, Nefeli, additional, Despoti, Akylina, additional, Tzoumi, Dimitra, additional, Leventakis, Nikolaos, additional, Roussou, Georgia, additional, Papathanasiou, Argyro, additional, Nanas, Serafeim, additional, and Karatzanos, Eleftherios, additional
- Published
- 2022
- Full Text
- View/download PDF
21. Immersive Virtual Reality in Cognitive Rehabilitation: A systematic Review
- Author
-
Akyllina Despoti, Eleftherios Karatzanos, Irini Patsaki, Dimitra Tzoumi, Georgia Roussou, Nikolaos Leventakis, Argyro Papathanasiou, Serafim Nanas, and Nefeli Dimitriadi
- Subjects
Cultural Studies ,Immersive ,Rehabilitation ,Religious studies ,Virtual Reality ,Cognitive Functions - Abstract
Background: Virtual Reality (VR) is a new technology used more and more in clinical trial. Aim: The aim of this study is to investigate the effects of immersive VR as a rehabilitation approach of cognitive functions. Method and Material: A systematic literature review was conducted in the electronic databases of PubMed, Cochrane, OTseeker and PsycINFO for articles published until August 2021. The main search terms were "immersive virtual reality," and "cognitive rehabilitation". The research was strictly limited in immersive technologies and adult patients suffering from neurological disorder or a traumatic injury or elderly with cognitive decline, and no reviews are included. Totally, 16 citations reviewed. Results: All intervention studies reported improvements either in cognitive functions or in stress management and relaxation. In particular, most of the studies demonstrated improvement in attention (N=6) but also in executive functions (N=3), in memory (N=5) and in navigation skills (N=1). Regarding safety and feasibility, most of the participants in the studies completed successfully the tasks and did not report stimulation sickness. Conclusions: The available limited data indicate that immersive VR environments can a) be feasible and safe and b) have a positive impact in cognitive functions in the dynamic process of rehabilitation. Further research is warranted in large-scale longitudinal clinical trials in various patients’ groups in order to compare the effects of immersive and non-immersive VR interventions. Future studies should further investigate the long-term impact on cognitive functions in interventions using immersive VR.
- Published
- 2022
22. Immersive Virtual Reality in Cognitive Rehabilitation: A systematic Review
- Author
-
Despoti, Akyllina, primary, Karatzanos, Eleftherios, additional, Patsaki, Irini, additional, Tzoumi, Dimitra, additional, Roussou, Georgia, additional, Leventakis, Nikolaos, additional, Papathanasiou, Argyro, additional, Nanas, Serafim, additional, and Dimitriadi, Nefeli, additional
- Published
- 2022
- Full Text
- View/download PDF
23. Bullying, victimization, and psychopathy in early adolescents: The moderating role of social support
- Author
-
Georgia Despoti, Kostas A. Fanti, and Constantinos M. Kokkinos
- Subjects
Social support ,Social Psychology ,Psychopathy ,Developmental and Educational Psychology ,medicine ,Early adolescents ,Association (psychology) ,Psychology ,medicine.disease ,Developmental psychology - Abstract
The purpose of this study was to explore the potential moderating role of perceived social support (school personnel, friends) and gender in the association between distinct psychopathic traits (ca...
- Published
- 2020
24. Remote neuropsychological evaluation of older adults
- Author
-
A. Tsiakiri, V. Koutzmpi, S. Megagianni, M. Toumaian, N. Geronikola, A. Despoti, S. Kanellopoulou, X. Arampatzi, E. Margioti, A. Davila, P. Zoi, F. Kalligerou, A. Liozidou, A. Tsapanou, and P. Sakka
- Subjects
Neuropsychology and Physiological Psychology ,Developmental and Educational Psychology - Abstract
The use of technological means in the process of neuropsychological assessment has been proposed as a technique with promising results in the field of detection of neurocognitive disorders for community-dwelling older adults. Especially during the pandemic period due to COVID-19, telemedicine assumed to be vital in the field of early diagnosis of cognitive disorders and highlighted the clinical utility of remote methods of neuropsychological assessmentby video-conference. This descriptive study presents the development of a remote neuropsychological assessment protocol by selecting appropriate validated tests as part of a more comprehensive evaluation for older adults dwelling in the community. We recruited participants from the Athens Alzheimer's Association center in collaboration with the Hellenic Neuropsychological Society, in Athens, Greece, regarding the period between April 2020 and October 2021. 90 individuals, tested for the first time, were categorized into three groups according to their diagnosis which included: (a) Mild Cognitive Impairment (MCI), (b) Alzheimer's disease, (c) cognitively healthy older adults. The presented protocol outlines the main considerations of a framework about remote neuropsychological assessment, which can maximize the effectiveness of interventions and continuity regarding the care of older adults. The recommendations outlined in the presented protocol highlight strengths and limitations that should be taken into account in remote control procedures. Although the protocol was created in response to pandemic restrictions, tele-neuropsychology shows promise as a way to improve access opportunity to neurodiagnostic services for rural aging and underserved populations, which lack specialized healthcare services. Further application to different populations will add validity to the presented descriptive protocol.
- Published
- 2022
25. Remote neuropsychological evaluation of older adults
- Author
-
Tsiakiri, A., primary, Koutzmpi, V., additional, Megagianni, S., additional, Toumaian, M., additional, Geronikola, N., additional, Despoti, A., additional, Kanellopoulou, S., additional, Arampatzi, X., additional, Margioti, E., additional, Davila, A., additional, Zoi, P., additional, Kalligerou, F., additional, Liozidou, A., additional, Tsapanou, A., additional, and Sakka, P., additional
- Published
- 2022
- Full Text
- View/download PDF
26. Remote neuropsychological evaluation of older adults
- Author
-
Tsiakiri, A. Koutzmpi, V. Megagianni, S. Toumaian, M. Geronikola, N. Despoti, A. Kanellopoulou, S. Arampatzi, X. Margioti, E. Davila, A. Zoi, P. Kalligerou, F. Liozidou, A. Tsapanou, A. Sakka, P.
- Abstract
The use of technological means in the process of neuropsychological assessment has been proposed as a technique with promising results in the field of detection of neurocognitive disorders for community-dwelling older adults. Especially during the pandemic period due to COVID-19, telemedicine assumed to be vital in the field of early diagnosis of cognitive disorders and highlighted the clinical utility of remote methods of neuropsychological assessmentby video-conference. This descriptive study presents the development of a remote neuropsychological assessment protocol by selecting appropriate validated tests as part of a more comprehensive evaluation for older adults dwelling in the community. We recruited participants from the Athens Alzheimer’s Association center in collaboration with the Hellenic Neuropsychological Society, in Athens, Greece, regarding the period between April 2020 and October 2021. 90 individuals, tested for the first time, were categorized into three groups according to their diagnosis which included: (a) Mild Cognitive Impairment (MCI), (b) Alzheimer’s disease, (c) cognitively healthy older adults. The presented protocol outlines the main considerations of a framework about remote neuropsychological assessment, which can maximize the effectiveness of interventions and continuity regarding the care of older adults. The recommendations outlined in the presented protocol highlight strengths and limitations that should be taken into account in remote control procedures. Although the protocol was created in response to pandemic restrictions, tele-neuropsychology shows promise as a way to improve access opportunity to neurodiagnostic services for rural aging and underserved populations, which lack specialized healthcare services. Further application to different populations will add validity to the presented descriptive protocol. © 2022 Taylor & Francis Group, LLC.
- Published
- 2022
27. Effect of starvation and re-feeding on reproductive indices, body weight, plasma metabolites and oxidative enzymes of sea bass ( Dicentrarchus labrax)
- Author
-
Chatzifotis, Stavros, Papadaki, Maria, Despoti, Smaragda, Roufidou, Chrysoula, and Antonopoulou, Efthimia
- Published
- 2011
- Full Text
- View/download PDF
28. QUANTITATIVE EEG AS OUTCOME MEASURE OF THE THERAPEUTIC EFFECTS OF TRANSCRANIAL PHOTOBIOMODULATION: A SYSTEMATIC REVIEW.
- Author
-
Magkouti, Eleni, Leventakis, Nikos, Alexandropoulou, Anna, Despoti, Akyllina, and Nanas, Serafim
- Subjects
ELECTROENCEPHALOGRAPHY ,PHOTOTHERAPY ,CEREBRAL circulation ,BRAIN ,NEURONS ,MILD cognitive impairment ,MEMORY disorders - Abstract
Background: Transcranial Photobiomodulation (t-PBM) is a current, innovative method that is used in the therapy of many neurological and psychological diseases. Its mechanisms of action have been investigated and the most well described ways of action are its effects on mitochondrial function and on heat/light-activated ion channels on neurons membrane. It has been suggested that the increase in cerebral blood flow and the alterations of membrane ion channels are the most dominant potential mechanisms that cause the effects of PBM on quantitative electroencephalography (qEEG), that some recent studies have reported. Aim: The aim of this review is to describe the effects that t-PBM has on brain oscillations, as these are measured by qEEG. Methods: The research was carried out in the Pubmed database and it included all studies that had been published until February 2022. Results: Overall, sixty-eight studies were located and considered, searching with the terms Photobiomodulation or Light Therapy or Near Infrared Light and EEG. Only eleven of them used Photobiomodulation in order to observe the effect it can have on human brain oscillations, measured by qEEG. Two studies reported the EEG alterations after t-PBM application on the hand instead of the head. Thus, nine studies were included in the review, which applied t-PBM and observed the alterations that it brought upon qEEG of healthy adults or patients with memory problems. Conclusion: The studies showed that t-PBM increases high frequency neural activity and inhibits low frequency oscillations. The studies varied a lot in the ways of light application and the parameters of the light itself, as well as on their study population. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
29. Marine spatial closures as a supplementary tool to reduce discards in bottom trawl fisheries: examples from southern European waters
- Author
-
Fabio Fiorentino, Luis Bentes, K. Tsagarakis, Alessandro Ligas, Nadia Papadopoulou, George Tserpes, Mario Sbrana, Germana Garofalo, Francesco Colloca, Giacomo Milisenda, I. Maina, Maria-Myrto Pyrounaki, Smaragda Despoti, Francesc Maynou, Athanassios Machias, Sergio Vitale, Karim Erzini, Konstantinos I. Stergiou, Marianna Giannoulaki, European Commission, and Agencia Estatal de Investigación (España)
- Subjects
0106 biological sciences ,Mediterranean climate ,Bottom trawl fishery ,Discards' spatial distribution ,Fisheries ,Aquatic Science ,01 natural sciences ,Fishery discards ,Marine protected areas ,14. Life underwater ,geography ,geography.geographical_feature_category ,Continental shelf ,010604 marine biology & hydrobiology ,Generalized additive model ,Bottom trawl fisheries ,Marine spatial closures ,04 agricultural and veterinary sciences ,Bottom trawling ,Discards ,Fishery ,Eastern mediterranean ,Spatial management ,Discards’ spatial distribution ,040102 fisheries ,0401 agriculture, forestry, and fisheries ,Marine protected area - Abstract
15 pages, 6 figures, 4 tables, supplementary data https://doi.org/10.1016/j.fishres.2020.105714, Discards is an important issue in fisheries around the world. The spatial management of discards has attracted interest as a potential tool for minimizing the unwanted catch. The aim of the present work was to identify areas with high quantities of bottom trawl discarded catch regarding species subjected to MCRS, in six areas of southern European waters (southern Portuguese waters, Catalan Sea, Ligurian and northern Tyrrhenian Seas, Strait of Sicily, eastern Ionian Sea, and Aegean Sea). Analyses were based on two types of data: (a) the undersized catch of species subjected to MCRS from bottom trawl surveys and (b) the actual discarded catch (including undersized and non-undersized individuals) of species subjected to MCRS from commercial bottom trawling. Geostatistical analysis techniques were applied to the first type of data and Generalized Additive Models using environmental variables were applied to the second one. Subsequently, areas that persistently presented high quantities of discarded catch (i.e., “iDC grounds”) or undersized catch (i.e., “iUC grounds”) were identified and mapped. The “iDC grounds”/“iUC grounds” were located either over the slope or within the continental shelf and over marine plateaus, largely depending on the main target species of each fishery. Next, the overlap of “iDC grounds”/“iUC grounds” with the existing Fisheries Restricted Areas (FRAs) and the proposed Marine Protected Areas (MPAs) was estimated aiming to explore how spatial closures could contribute to the reduction of bottom trawl discarded catch/undersized catch. Certain spatial closures were more effective in the Central Mediterranean and others to the Eastern Mediterranean. The overlapping of existing FRAs with “iDC grounds”/“iUC grounds” did not exceed 24 % in any study area, whereas proposed MPAs, like the CIESM Marine Peace Parks, reached up to 90 % for the same study area, This work was funded by the European Commission’s Horizon 2020 Research and Innovation Program under Grant Agreement No. 634495 for the project Science, Technology, and Society Initiative to minimize Unwanted Catches in European Fisheries (MINOUW). We thank people involved in the MEDISEH project (MAREA PROJECT MEDISEH: Mediterranean Sensitive Habitats, Specific Contract No 2, SI2.600741) for data provision regarding FRAs and MPAs, With the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI)
- Published
- 2020
30. Empty-nest-related psychosocial stress: Conceptual issues, future directions in economic crisis
- Author
-
A Despoti, E Vasilopoulos, and A Bougea
- Subjects
Adult ,Male ,Parents ,Coping (psychology) ,media_common.quotation_subject ,Midlife crisis ,Developmental psychology ,Social support ,Cultural diversity ,Surveys and Questionnaires ,Adaptation, Psychological ,Humans ,Marriage ,Empty nest syndrome ,media_common ,Poverty ,Social Support ,General Medicine ,Middle Aged ,Distress ,Economic Recession ,Socioeconomic Factors ,Adult Children ,Grief ,Female ,Psychology ,Social Adjustment ,Stress, Psychological - Abstract
Τhe empty-nest syndrome is a transitional stage, when middle-aged parents are in the process of encouraging their children to take up their obligations as adults. The empty-nest syndrome is a psychological condition that affects both parents, who experience feelings of grief, loss, fear, inability, difficulty in adjusting roles, and change of parental relationships, when children leave the parental home. Τhis syndrome has gained special interest in a world where the current economic crisis has not only deepened global poverty but also a crisis of values reflected in the dynamic model of the family. The purpose of this review was to appraise the impact of psychosocial stress of the empty- nest syndrome on the parents' well-being through the years, during the current socio-economic crisis, taking into account gender, national and cultural background, socio-demographic and other context factors. We addressed the phenomenon of the "Boomerang Kids" and crowded nests as a result of current financial instability. Finally, we focused on the strategies which the family can employ to retain their resilience, according to the Transactional Model of Stress and Coping Family resilience framework and self-efficacy models. A literature review was conducted using web-based search engines provided by Medline, Scopus, Embase, Cochrane and PsychINFO. The term "empty nest syndrome'' was combined with women, men, economic crisis, parenthood, stress, menopause, midlife crisis, Boomerang kids, crowded nets, resilience, self-efficacy, wellbeing, and cultural differences. Women and men from diverse cultural groups have a different experience of the empty nest, as well as ways of coping. Distress caused by empty nest results in the incidence of symptoms of depression, behavioral symptoms and cognitive impairment. In most of studies, low marital quality and lack of social support affected negatively on a parent's well-being particularly for those experiencing the return of their "Boomerang kids". However, the financial crisis can transform an empty-nest into a "dynamic nest" by community health promotion services. Social support programs should be designed to strengthen family resource and improve family well-being.
- Published
- 2020
31. Marine spatial closures as a supplementary tool to reduce discards in bottom trawl fisheries: Examples from southern European waters
- Author
-
European Commission, Agencia Estatal de Investigación (España), Despoti, Smaragda, Milisenda, Giacomo, Ligas, Alessandro, Bentes, Luis, Maynou, Francesc, Vitale, Sergio, Garofalo, G., Sbrana, Mario, Erzini, Karim, Tserpes, George, Tsagarakis, K., Maina, Iridia, Pyrounaki, Maria-Myrto, Papadopoulou, Nadia, Machias, A., Colloca, Francesco, Fiorentino, Fabio, Stergiou, K.I., Giannoulaki, Marianna, European Commission, Agencia Estatal de Investigación (España), Despoti, Smaragda, Milisenda, Giacomo, Ligas, Alessandro, Bentes, Luis, Maynou, Francesc, Vitale, Sergio, Garofalo, G., Sbrana, Mario, Erzini, Karim, Tserpes, George, Tsagarakis, K., Maina, Iridia, Pyrounaki, Maria-Myrto, Papadopoulou, Nadia, Machias, A., Colloca, Francesco, Fiorentino, Fabio, Stergiou, K.I., and Giannoulaki, Marianna
- Abstract
Discards is an important issue in fisheries around the world. The spatial management of discards has attracted interest as a potential tool for minimizing the unwanted catch. The aim of the present work was to identify areas with high quantities of bottom trawl discarded catch regarding species subjected to MCRS, in six areas of southern European waters (southern Portuguese waters, Catalan Sea, Ligurian and northern Tyrrhenian Seas, Strait of Sicily, eastern Ionian Sea, and Aegean Sea). Analyses were based on two types of data: (a) the undersized catch of species subjected to MCRS from bottom trawl surveys and (b) the actual discarded catch (including undersized and non-undersized individuals) of species subjected to MCRS from commercial bottom trawling. Geostatistical analysis techniques were applied to the first type of data and Generalized Additive Models using environmental variables were applied to the second one. Subsequently, areas that persistently presented high quantities of discarded catch (i.e., “iDC grounds”) or undersized catch (i.e., “iUC grounds”) were identified and mapped. The “iDC grounds”/“iUC grounds” were located either over the slope or within the continental shelf and over marine plateaus, largely depending on the main target species of each fishery. Next, the overlap of “iDC grounds”/“iUC grounds” with the existing Fisheries Restricted Areas (FRAs) and the proposed Marine Protected Areas (MPAs) was estimated aiming to explore how spatial closures could contribute to the reduction of bottom trawl discarded catch/undersized catch. Certain spatial closures were more effective in the Central Mediterranean and others to the Eastern Mediterranean. The overlapping of existing FRAs with “iDC grounds”/“iUC grounds” did not exceed 24 % in any study area, whereas proposed MPAs, like the CIESM Marine Peace Parks, reached up to 90 % for the same study area
- Published
- 2020
32. Bullying, victimization, and psychopathy in early adolescents: The moderating role of social support
- Author
-
Despoti, Georgia, primary, Kokkinos, Constantinos M., additional, and Fanti, Kostas A., additional
- Published
- 2020
- Full Text
- View/download PDF
33. Marine spatial closures as a supplementary tool to reduce discards in bottom trawl fisheries: Examples from southern European waters
- Author
-
Despoti, Smaragda, primary, Milisenda, Giacomo, additional, Ligas, Alessandro, additional, Bentes, Luis, additional, Maynou, Francesc, additional, Vitale, Sergio, additional, Garofalo, Germana, additional, Sbrana, Mario, additional, Erzini, Karim, additional, Tserpes, George, additional, Tsagarakis, Konstantinos, additional, Maina, Irida, additional, Pyrounaki, Maria-Myrto, additional, Papadopoulou, Nadia, additional, Machias, Athanassios, additional, Colloca, Francesco, additional, Fiorentino, Fabio, additional, Stergiou, Konstantinos I., additional, and Giannoulaki, Marianna, additional
- Published
- 2020
- Full Text
- View/download PDF
34. Empty-nest-related psychosocial stress: Conceptual issues, future directions in economic crisis
- Author
-
Bougea, A, primary, Despoti, A, additional, and Vasilopoulos, E, additional
- Published
- 2020
- Full Text
- View/download PDF
35. Empty-nest-related psychosocial stress: Conceptual issues, future directions in economic crisis
- Author
-
Bougea, A. Despoti, A. Vasilopoulos, E.
- Abstract
Τhe empty-nest syndrome is a transitional stage, when middle-aged parents are in the process of encouraging their children to take up their obligations as adults. The empty-nest syndrome is a psychological condition that affects both parents, who experience feelings of grief, loss, fear, inability, difficulty in adjusting roles, and change of parental relationships, when children leave the parental home. Τhis syndrome has gained special interest in a world where the current economic crisis has not only deepened global poverty but also a crisis of values reflected in the dynamic model of the family. The purpose of this review was to appraise the impact of psychosocial stress of the empty- nest syndrome on the parents' well-being through the years, during the current socio-economic crisis, taking into account gender, national and cultural background, socio-demographic and other context factors. We addressed the phenomenon of the "Boomerang Kids" and crowded nests as a result of current financial instability. Finally, we focused on the strategies which the family can employ to retain their resilience, according to the Transactional Model of Stress and Coping Family resilience framework and self-efficacy models. A literature review was conducted using web-based search engines provided by Medline, Scopus, Embase, Cochrane and PsychINFO. The term "empty nest syndrome'' was combined with women, men, economic crisis, parenthood, stress, menopause, midlife crisis, Boomerang kids, crowded nets, resilience, self-efficacy, wellbeing, and cultural differences. Women and men from diverse cultural groups have a different experience of the empty nest, as well as ways of coping. Distress caused by empty nest results in the incidence of symptoms of depression, behavioral symptoms and cognitive impairment. In most of studies, low marital quality and lack of social support affected negatively on a parent's well-being particularly for those experiencing the return of their "Boomerang kids". However, the financial crisis can transform an empty-nest into a "dynamic nest" by community health promotion services. Social support programs should be designed to strengthen family resource and improve family well-being.
- Published
- 2019
36. Assessing the spatial distribution of five non-commercial fish species in the Aegean Sea (Greece, eastern Mediterranean Sea) based on discards data
- Author
-
Konstantinos I. Stergiou, K. Tsagarakis, Smaragda Despoti, Athanassios Machias, Angeliki Adamidou, Marianna Giannoulaki, Vassiliki Vassilopoulou, and Vasilis D. Valavanis
- Subjects
0106 biological sciences ,Comber ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Ecology ,biology ,Continental shelf ,010604 marine biology & hydrobiology ,Species distribution ,Aquatic Science ,Spatial distribution ,biology.organism_classification ,01 natural sciences ,Hepatus ,Discards ,Cepola macrophthalma ,Fishery ,Geography ,Animal Science and Zoology ,Bandfish ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences - Abstract
Spatial management of discards has attracted increasing interest as a potential mitigation measure. However, most studies are restricted to commercial species. The aim of the present work was to fill this gap by identifying and mapping the spatial distribution of five non-commercial species with high frequency of occurrence in the discarded catch of bottom trawl fishery in the Aegean Sea, i.e., Brown comber Serranus hepatus, Mediterranean scaldfish Arnoglossus laterna, Red bandfish Cepola macrophthalma, Argentine Argentina sphyraena, and Boarfish Capros aper. For this purpose, Generalized Additive Models were used to account for catch dependency on environmental parameters in order to explore the spatial distribution of species. Modeling results revealed that the spatial distribution of species was driven by environmental variables. Depth was the most informative variable explaining most catch variation in all species. For A. laterna, C. macrophthalma, and S. hepatus the highest estimated values of catch were located over the continental shelf and at shallower waters inside gulfs, whereas C. aper and A. sphyraena catch were more broadly distributed across the study area and at greater depths. Seasonal variations in species catch were also observed, probably related in most cases to species reproduction period. Mapping species distribution is essential for the identification of priority areas of protection in future marine spatial plans.
- Published
- 2021
37. A Bayesian model of fisheries discards with flexible structure and priors defined by experts
- Author
-
Maeda, Eduardo Eiji, primary, Mäntyniemi, Samu, additional, Despoti, Smaragda, additional, Musumeci, Claudia, additional, Vassilopoulou, Vassiliki, additional, Stergiou, Konstantinos I., additional, Giannoulaki, Marianna, additional, Ligas, Alessandro, additional, and Kuikka, Sakari, additional
- Published
- 2017
- Full Text
- View/download PDF
38. Effect of starvation and re-feeding on reproductive indices, body weight, plasma metabolites and oxidative enzymes of sea bass (Dicentrarchus labrax)
- Author
-
Chrysoula Roufidou, Smaragda Despoti, Efthimia Antonopoulou, Maria Papadaki, and Stavros Chatzifotis
- Subjects
Starvation ,medicine.medical_specialty ,Cholesterol ,Context (language use) ,Aquatic Science ,Biology ,biology.organism_classification ,chemistry.chemical_compound ,Endocrinology ,chemistry ,Internal medicine ,Lactate dehydrogenase ,Blood plasma ,medicine ,Dicentrarchus ,Vitellogenesis ,Sea bass ,medicine.symptom - Abstract
Feed management is an important factor for successful aquaculture, especially when it affects gonad maturation. In this context, the present study evaluates the effects of long term starvation (1F–3S: one-month feeding – three-month starvation) and starvation/re-feeding (2S–2F: two-month starvation – two-month re-feeding) on gonad maturation, hematological/biochemical indices and proximate composition of liver and muscle of vitelogenic sea bass. In males, all the fish in the control group (4F–0S: four-month feeding – zero-month starvation) reached the maturity stage S2 (Mature), while only 33% and 75% reached that stage in the 1F–3S and 2S–2F groups, respectively. In females, the percentages of immature gonads were 80%, 25% and 50% for the groups 1F–3S, 2S–2F and 4F–0S respectively, while the percentages of the fish which reached the stage of vitellogenesis were 20%, 75% and 50% for the same groups. The concentration of glucose and lactate in plasma was not affected by starvation or re-feeding. On the contrary, triglycerides, phospholipids and total lipids of group 1F–3S decreased significantly, whereas cholesterol did not differ compared to the control group. In the 2S–2F group, total lipids and cholesterol were also significantly decreased while triglycerides and phospholipids were not altered. Proximate composition analysis in the liver showed that long term starvation (1F–3S) led to a significant reduction of crude lipid and ash, compared to the 4F–0S and 2S–2F groups. In contrast, crude protein concentration in the liver was significantly increased in 1F–3S group compared to 4F–0S and 2S–2F groups. In white muscle a significant reduction of crude lipids was detected in the 1F–3S and 2S–2F groups, while no significant changes were observed in crude protein, ash and moisture concentrations. The enzymatic activities of lactate dehydrogenase (L-LDH), citrate synthase (CS) and 3-hydroxyacyl CoA dehydrogenase (HOAD) were significantly increased in the liver of 1F–3S fish, whereas in red muscle both HOAD and CS were significantly decreased in both 1F–3S and 2S–2F groups. Overall our results indicate that a 2 month starvation and 2 month re-feeding period during vitellogenesis reduces GSI and maturity stage in male sea bass and affect the levels of biochemical blood indices and the activities of certain enzymes of the intermediary metabolism.
- Published
- 2011
39. Empty-nest-related psychosocial stress: Conceptual issues, future directions in economic crisis.
- Author
-
Bougea, A., Despoti, A., and Vasilopoulos, E.
- Published
- 2019
40. Starvation and re-feeding affect Hsp expression, MAPK activation and antioxidant enzymes activity of European sea bass (Dicentrarchus labrax)
- Author
-
Stavros Chatzifotis, Smaragda Despoti, Chrysoula Roufidou, Elissavet Kentepozidou, Konstantinos Feidantsis, and Efthimia Antonopoulou
- Subjects
medicine.medical_specialty ,Physiology ,MAP Kinase Signaling System ,Biology ,medicine.disease_cause ,Biochemistry ,p38 Mitogen-Activated Protein Kinases ,Superoxide dismutase ,chemistry.chemical_compound ,Glutathione Peroxidase GPX1 ,Internal medicine ,Cellular stress response ,TBARS ,medicine ,Animals ,HSP70 Heat-Shock Proteins ,HSP90 Heat-Shock Proteins ,Sea bass ,Phosphorylation ,Molecular Biology ,Glutathione Peroxidase ,Kinase ,Superoxide Dismutase ,Glutathione ,Catalase ,Oxidative Stress ,Endocrinology ,chemistry ,Gene Expression Regulation ,biology.protein ,Bass ,Food Deprivation ,Oxidative stress - Abstract
In the context of food deprivation in fish (wild and farmed), understanding of cellular responses is necessary in order to develop strategies to minimize stress caused by starvation in the aquaculture section. The present study evaluates the effects of long term starvation (1F–3S: one-month feeding–three-month starvation) and starvation/re-feeding (2S–2F: two-month starvation–two-month re-feeding) compared to the control group (4F–0S: four-month feeding–zero month starvation) on cellular stress response and antioxidant defense in organs, like the intestine, the liver, the red and white muscle of European sea bass Dicentrarchus labrax. Molecular responses were addressed through the expression of Hsp70 and Hsp90, the phosphorylation of stress-activated protein kinases and particularly p38 mitogen-activated protein kinase (p38 MAPK) and the extracellular signal-regulated kinases (ERK-1/2). For the determination of the effect of the oxidative stress caused by food deprivation and/or re-feeding, the (maximum) activities of antioxidant enzymes such as glutathione peroxidise (GPx), catalase (CAT) and superoxide dismutase (SOD) as well as the determination of thiobarbituric acid reactive substances (TBARS) were studied. The experimental feeding trials caused a tissue distinct and differential response on the cellular and antioxidant capacity of sea bass not only during the stressful process of starvation but also in re-feeding. Specifically, the intestine phosphorylation of ERKs and antioxidant enzymatic activities increased in the 2S–2F fish group, while in the 1F–3S group an increase was detected in the levels of the same proteins except for GPx. In the liver and the red muscle of 2S–2F fish, decreased Hsp70 and phosphorylated p38 MAPK levels and increased Hsp90 levels were observed. Additionally, SOD activity decreased in the red muscle of 2S–2F and 1F–3S groups. In the liver and red muscle of 1F–3S group Hsp70 levels increased, while the activation of p38 MAPK in the liver decreased. In the white muscle, Hsp90 levels decreased and the phosphorylation of p38 MAPK increased in both feeding regimes compared to control. In the same tissue, GPx and catalase levels were decreased in 2S–2F regime, while SOD levels were decreased in 1F–3S regime.
- Published
- 2012
41. Starvation and re-feeding affect Hsp expression, MAPK activation and antioxidant enzymes activity of European Sea Bass (Dicentrarchus labrax)
- Author
-
Antonopoulou, Efthimia, primary, Kentepozidou, Elissavet, additional, Feidantsis, Konstantinos, additional, Roufidou, Chrysoula, additional, Despoti, Smaragda, additional, and Chatzifotis, Stavros, additional
- Published
- 2013
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.