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1.
Biodegradation ; 35(5): 493-518, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38310578

RESUMEN

Plastic pollution has become a global problem since the extensive use of plastic in industries such as packaging, electronics, manufacturing and construction, healthcare, transportation, and others. This has resulted in an environmental burden that is continually growing, which has inspired many scientists as well as environmentalists to come up with creative solutions to deal with this problem. Numerous studies have been reviewed to determine practical, affordable, and environmentally friendly solutions to regulate plastic waste by leveraging microbes' innate abilities to naturally decompose polymers. Enzymatic breakdown of plastics has been proposed to serve this goal since the discovery of enzymes from microbial sources that truly interact with plastic in its naturalistic environment and because it is a much faster and more effective method than others. The scope of diverse microbes and associated enzymes in polymer breakdown is highlighted in the current review. The use of co-cultures or microbial consortium-based techniques for the improved breakdown of plastic products and the generation of high-value end products that may be utilized as prototypes of bioenergy sources is highlighted. The review also offers a thorough overview of the developments in the microbiological and enzymatic biological degradation of plastics, as well as several elements that impact this process for the survival of our planet.


Asunto(s)
Biodegradación Ambiental , Plásticos , Contaminación Ambiental/prevención & control , Bacterias/metabolismo
2.
Neurocrit Care ; 41(1): 129-145, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38286946

RESUMEN

BACKGROUND: We developed a gap analysis that examines the role of brain-computer interfaces (BCI) in patients with disorders of consciousness (DoC), focusing on their assessment, establishment of communication, and engagement with their environment. METHODS: The Curing Coma Campaign convened a Coma Science work group that included 16 clinicians and neuroscientists with expertise in DoC. The work group met online biweekly and performed a gap analysis of the primary question. RESULTS: We outline a roadmap for assessing BCI readiness in patients with DoC and for advancing the use of BCI devices in patients with DoC. Additionally, we discuss preliminary studies that inform development of BCI solutions for communication and assessment of readiness for use of BCIs in DoC study participants. Special emphasis is placed on the challenges posed by the complex pathophysiologies caused by heterogeneous brain injuries and their impact on neuronal signaling. The differences between one-way and two-way communication are specifically considered. Possible implanted and noninvasive BCI solutions for acute and chronic DoC in adult and pediatric populations are also addressed. CONCLUSIONS: We identify clinical and technical gaps hindering the use of BCI in patients with DoC in each of these contexts and provide a roadmap for research aimed at improving communication for adults and children with DoC, spanning the clinical spectrum from intensive care unit to chronic care.


Asunto(s)
Interfaces Cerebro-Computador , Trastornos de la Conciencia , Humanos , Trastornos de la Conciencia/fisiopatología , Trastornos de la Conciencia/terapia , Comunicación
3.
Pak J Pharm Sci ; 37(4): 863-871, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39348652

RESUMEN

Lovastatin has received interest for its potential therapeutic use in treating numerous diseases, for example, the blood cholesterol level by restraining hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase. The research utilized the fungal growth bioassay technique to disengage and evaluate filamentous organism for the lovastatin creation. The clever type of Aspergillus terreus (KF971363.1) was embraced for lovastatin creation by solid-state fermentation (SSF). Lovastatin production was optimized using physiological parameters such as pH and temperature at SSF. The addition of nitrogen source enhanced the production of lovastatin by the breakdown of lignocellulose that improved the production of lovastatin. The research verified a yeast growth inhibition bioassay approach, in addition to thin-layer chromatography and liquid chromatography-mass spectrometry (LC-MS). All of these techniques were used to confirm lovastatin production. The purified extract subjected to the TLC analysis showed retention factor (Rf) value of 0.73. Moreover, the inhibition bioassay method reassures the lovastatin production by comparing the zone of inhibition against C. albicans.


Asunto(s)
Antifúngicos , Aspergillus , Fermentación , Lovastatina , Lovastatina/biosíntesis , Lovastatina/farmacología , Aspergillus/metabolismo , Aspergillus/efectos de los fármacos , Aspergillus/crecimiento & desarrollo , Antifúngicos/farmacología , Antifúngicos/metabolismo , Cromatografía en Capa Delgada , Candida albicans/efectos de los fármacos , Candida albicans/crecimiento & desarrollo , Candida albicans/metabolismo , Concentración de Iones de Hidrógeno , Temperatura , Espectrometría de Masas
4.
Saudi Pharm J ; 31(2): 265-278, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36942277

RESUMEN

Valproic acid, a branching short chain fatty acid, is a popular drug to treat epilepsy and acts as a mood-stabilizing drug. The obstruction of ion channels and Gamma Amino Butyrate transamino butyrate GABA has been linked to antiepileptic effects. Valproic acid has been characterized as a Histone deacetylase inhibitor, functioning directly transcription of gene levels by blocking the deacetylation of histones and increasing the accessibility of transcription sites. Study has been extensively focused on pharmaceutical activity of valproic acid through various pharmacodynamics activity from absorption, distribution and excretion particularly in patients who are resistant to or intolerant of lithium or carbamazepine, as well as those with mixed mania or rapid cycling.

5.
Pak J Pharm Sci ; 36(5): 1483-1488, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37869924

RESUMEN

Accumulation of melanin pigment in some specific areas of human skin leads to various skin disorders. This study includes melanin production and extraction from non-dermatophyte, filamentous fungi (Aspergillus niger). The effect of carbon, nitrogen, pH and temperature on melanin production was also observed. Qualitative and Quantitative analysis was performed to confirm melanin pigment from A. niger by using solubility test, precipitation test and reaction with oxidizing and reducing agent. Fungus gave maximum melanin production with dextrose, peptone, pH 5.6 at 37oC. To avoid hyper pigmentation tyrosinase is the primary target to inhibit melanin production. Study has used A. Niger as model organism to study the melanin formation under various melanin inhibitors. Ascorbic acid showed maximum inhibition at 50% while it was 25% for Kojic acid. Curcumin inhibited the tyrosinase activity at 25% while maximum inhibition observed was 30% for Aloesin and 20% for flavonoid.


Asunto(s)
Melaninas , Monofenol Monooxigenasa , Humanos , Flavonoides/farmacología , Piel , Aspergillus niger
6.
Pak J Pharm Sci ; 36(1): 103-109, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36967503

RESUMEN

Fungal biofilms are a growing clinical concern associated with high mortality rates. This study included three fungal groups, dimorphic fungi (Candida albicans), Dermatophytes (Trichophyton mentagrophytes) and non-dermatophytes (Acremonium sclerotigenum, Aspergillus niger). This research describes the in vitro characteristics of biofilm formation in three fungal groups. The influence of osmotic, oxidative and pH stress environment on biofilm growth was also focused. Biofilm characteristics in A. sclerotigenum and A. niger were studied for the first time. In vitro qualitative and quantitative approaches were used to evaluate biofilm development including the test tube method, tissue culture plate method in addition to staining with crystal violet and safranin. All the isolates were able to form biofilm. Biofilm development under different pH range showed maximum growth at neutral pH. At a concentration of 5mM hydrogen peroxide and 2M NaCl biofilm formation was maximum for all three fungal groups under an oxidative and osmotic stress respectively. Study revealed that biofilm production was increased under osmotic and oxidative stress. All isolates respond to oxidative and osmotic stress by changing the cell wall composition with a rich exopolymeric matrix in order to survive in stress environment.


Asunto(s)
Candida albicans , Violeta de Genciana , Candida albicans/fisiología , Estrés Oxidativo , Biopelículas
7.
Genet Med ; 23(10): 1873-1881, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-34113002

RESUMEN

PURPOSE: Phosphatidylinositol Glycan Anchor Biosynthesis, class G (PIGG) is an ethanolamine phosphate transferase catalyzing the modification of glycosylphosphatidylinositol (GPI). GPI serves as an anchor on the cell membrane for surface proteins called GPI-anchored proteins (GPI-APs). Pathogenic variants in genes involved in the biosynthesis of GPI cause inherited GPI deficiency (IGD), which still needs to be further characterized. METHODS: We describe 22 individuals from 19 unrelated families with biallelic variants in PIGG. We analyzed GPI-AP surface levels on granulocytes and fibroblasts for three and two individuals, respectively. We demonstrated enzymatic activity defects for PIGG variants in vitro in a PIGG/PIGO double knockout system. RESULTS: Phenotypic analysis of reported individuals reveals shared PIGG deficiency-associated features. All tested GPI-APs were unchanged on granulocytes whereas CD73 level in fibroblasts was decreased. In addition to classic IGD symptoms such as hypotonia, intellectual disability/developmental delay (ID/DD), and seizures, individuals with PIGG variants of null or severely decreased activity showed cerebellar atrophy, various neurological manifestations, and mitochondrial dysfunction, a feature increasingly recognized in IGDs. Individuals with mildly decreased activity showed autism spectrum disorder. CONCLUSION: This in vitro system is a useful method to validate the pathogenicity of variants in PIGG and to study PIGG physiological functions.


Asunto(s)
Trastorno del Espectro Autista , Discapacidad Intelectual , Fosfotransferasas (Aceptor de Grupo Alcohol)/genética , Humanos , Proteínas de la Membrana , Linaje , Convulsiones , Virulencia
8.
Curr Opin Neurol ; 32(4): 611-616, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31116115

RESUMEN

PURPOSE OF REVIEW: The purpose of this review is to highlight the origin and evolution of the field of neurodevelopmental disabilities and describe the main construct(s) upon which the current classification of neurodevelopmental disorders is based. RECENT FINDINGS: We address the following questions: Are neurodevelopmental disorders independent entities? Why is it desirable to understand the neurobiological substrate for these disorders? What new knowledge have we generated by leveraging advances in neuroscience, genetics, and neuroimaging? And finally, is the current construct, that is based on functional classification, still useful? SUMMARY: As our biological understanding of brain-behavior disorders evolves, we ought to re-evaluate the current classification system and expand it into a multidimensional classification that takes into account behavioral profiles and underlying mechanisms.


Asunto(s)
Encéfalo/diagnóstico por imagen , Trastornos del Neurodesarrollo/diagnóstico , Humanos , Trastornos del Neurodesarrollo/clasificación , Trastornos del Neurodesarrollo/diagnóstico por imagen , Neuroimagen
9.
Curr Genet ; 65(3): 735-745, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30603874

RESUMEN

Azoles are the most widely used antifungals for controlling fungal infections in clinic and agriculture. Fungi can adapt to azole stress by rapidly activating the transcription of a number of genes, and some of these genes can elevate resistance to azoles. We had reported the transcription factor CCG-8 as a new regulator in the adaptation to antifungal azole stress in Neurospora crassa and Fusarium verticillioides. In this study, we further investigate the mechanisms by which CCG-8 promotes fungal adaptation to azole stress using N. crassa as a model. While deletion of ccg-8 made N. crassa hypersensitive to azoles, ccg-8 overexpression strain was more resistant to azoles than wild type, which further confirmed the positive role of ccg-8 in the adaptation to antifungal azoles. Liquid chromatography-mass spectrometry analysis showed that deletion of ccg-8 resulted in decrease of ergosterol biosynthesis, and high accumulation of toxic sterol 14α-methyl-3,6-diol and ketoconazole (KTC) in the cells, whereas intracellular accumulation of ketoconazole was decreased in the ccg-8 overexpression strain as compared to wild type. For analyzing the effect of CCG-8 on azole export, we tested the contribution of predicted multidrug transporters to azole resistance and found that CDR4 is the major contributor for azole efflux in N. crassa. Interestingly, overexpression of cdr4 or erg11 in the ccg-8 deletion mutant restored its hypersensitive phenotype and overexpression of cdr4 can reduce the level of intracellular KTC. However, the double mutant of ccg-8 and cdr4 was more sensitive than each single mutant, suggesting that drug efflux pump CDR4 plays less contribution for intracellular azole accumulation in the ccg-8 deletion mutant, and CCG-8 may regulate drug uptake. Together, our results revealed that CCG-8 plays a pivotal role in azole adaptive responses of N. crassa by regulating the drug accumulation in the cells.


Asunto(s)
Adaptación Fisiológica/efectos de los fármacos , Azoles/farmacología , Farmacorresistencia Fúngica , Proteínas Fúngicas/metabolismo , Regulación Fúngica de la Expresión Génica/efectos de los fármacos , Neurospora crassa/efectos de los fármacos , Factores de Transcripción/metabolismo , Antifúngicos/farmacología , Proteínas Fúngicas/genética , Pruebas de Sensibilidad Microbiana , Factores de Transcripción/genética
10.
Int J Psychiatry Clin Pract ; 19(2): 137-47, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25666860

RESUMEN

OBJECTIVE: The current nosological classifications may describe a syndrome of "alcoholism" that is too heterogeneous to produce prognostic models for clinical management. Multidimensional alcoholism typologies (ATs) could represent a valuable paradigm in the search for targeted treatment. The main goal of this study was to evaluate the clinical implications of 3 empirically-validated ATs, focusing on various measures of clinical performance. METHOD: This was a 3-month naturalistic study in which drinking status, and participation in the clinical protocol and group psychotherapy were recorded and used as indicators of treatment performance. The clinical profiles of the subtypes were also compared and graphically presented. Alcohol-dependent outpatients were classified according to the Cloninger, Lesch, and NETER typologies. RESULTS: The results showed that the type II (Cloninger), type IV (Lesch), and sociopathic and addictopathic (NETER) subgroups showed a worse outcome in terms of abstinence rates and clinical healthcare resource use. CONCLUSIONS: Our findings point to the need to differentiate multidimensional alcoholism subtypes before planning the clinical management of alcohol use disorders.


Asunto(s)
Trastornos Relacionados con Alcohol/clasificación , Trastornos Relacionados con Alcohol/terapia , Evaluación de Resultado en la Atención de Salud , Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pacientes Ambulatorios , Estudios Prospectivos , Adulto Joven
11.
J Chiropr Humanit ; 31: 8-19, 2024 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-39070723

RESUMEN

Objective: The purpose of this study was to investigate the emigration intentions of South African senior chiropractic students upon graduation, emphasizing motivations and considerations guiding migration decisions. Methods: A cross-sectional, quantitative, and exploratory approach was employed, utilizing an anonymous and adapted online survey administered to chiropractic students at 2 South African institutions (n = 177) between March 15 and May 19, 2021. Data were analyzed using frequencies, descriptions, and cross-tabulations to identify trends and interrelationships related to students' intentions to emigrate postqualification. Results: Findings indicate that 75.5% of South African chiropractic senior students intend to emigrate. Motivations for emigration include improved quality of life and seeking of opportunities. Economic instability in South Africa (SA) (82.7%) and concern for the National Health Insurance implementation (57.7%) serve as a significant push factor, whereas economic stability abroad (85.7%) emerged as a key pull factor. Preferred emigration destinations are primarily developed countries with established chiropractic communities. Conclusion: High emigration intentions among students were driven by diverse push factors in SA, including economic decline, socio-political climates, and safety concerns, contrasting with pull factors abroad, such as better opportunities, living conditions, and economic stability. Concerns regarding healthcare reforms, particularly the National Health Insurance, are also highlighted. Destinations in order of preference such as the United Kingdom, Canada, and Australia offer valuable insights for policy interventions. Understanding these dynamics is crucial for developing effective retention strategies and addressing socio-economic challenges.

12.
BMJ Open ; 14(3): e078483, 2024 Mar 08.
Artículo en Inglés | MEDLINE | ID: mdl-38458779

RESUMEN

INTRODUCTION: Enhancing interprofessional education (IPE) fosters collaborative efforts among healthcare professionals specializing in musculoskeletal (MSK) care. This approach presents a valuable opportunity to address the pressing MSK disease burden in developing countries, with high prevalence rates and limited resources. While an abundance of literature on the various elements of IPE among healthcare students and professionals exists, shared contexts of practice of South African MSK disciplines are not currently developed through IPE at higher education level, establishing a need for South African formalised curricular IPE interventions with an explicit focus on undergraduate students of MSK healthcare professions. METHODS AND ANALYSIS: The intended scoping review protocol is guided by the framework set out by Arksey and O'Malley, where the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews will guide the process of reporting. English sources (qualitative and quantitative methodological studies, conference papers and proceedings, systematic reviews, grey literature, unpublished materials, theses and dissertations) from the electronic databases PubMed, Scopus, ERIC and ProQuest with no date restriction will be included. A researcher, an independent reviewer and research librarian will search and extract data from abstracts and full texts for this scoping review, where any arising disagreements will be resolved by discussion. Reference lists of relevant literature will be scrutinised. Relevant literature will be recorded on a referencing software and deduplicated. The data collection will take place between May and October 2023. The findings will be reported narratively with the use of tables. ETHICS AND DISSEMINATION: This scoping review does not require ethical approval as all literature used already exists in the public domain with no involvement of human participants. The findings from this planned review will be submitted to peer-reviewed journals and will be presented at higher education conferences. This scoping review protocol was registered on Open Science Framework with the registration osf.io/c27n4.


Asunto(s)
Educación Interprofesional , Estudiantes , Humanos , Costo de Enfermedad , Recolección de Datos , Proyectos de Investigación , Literatura de Revisión como Asunto , Revisiones Sistemáticas como Asunto , Sudáfrica
13.
J Chiropr Educ ; 2024 Sep 17.
Artículo en Inglés | MEDLINE | ID: mdl-39286931

RESUMEN

OBJECTIVE: To examine peer-reviewed literature involving undergraduate interprofessional education (IPE) focusing on musculoskeletal (MSK) healthcare professions. METHODS: Methodological searches were conducted on electronic databases PubMed, Scopus, ERIC, and ProQuest. No date restrictions were applied. English sources (qualitative and quantitative methodological studies, conference papers and proceedings, systematic reviews, grey literature, unpublished materials, theses, and dissertations) were included. A researcher, independent reviewer, and research librarian completed the search and data extraction from June to October 2023. Disagreements were resolved by discussion. ATLAS.ti was used to analyze data by generating codes linked to the text. Findings were reported in a narrative format and by using tables. RESULTS: Initially, 2894 articles were retrieved and screened for relevance. After rigorous screening procedures, 18 articles from various countries were deemed eligible for inclusion. The included studies were conducted within the date range of 2010 to 2024. The included studies employed mixed methods (n = 9), quantitative (n = 5), and qualitative (n = 4) approaches. Combined medical and physiotherapy student cohorts were prominently featured in 67% (n = 12) of the reviewed studies. All 18 studies incorporated the implementation and/or evaluation of an IPE intervention. Thematic analysis revealed 5 overarching themes, encompassing the benefits, barriers, interventions, strategies, evaluation, and general findings related to IPE. CONCLUSION: The reviewed literature emphasizes a significant gap in IPE initiatives concerning various MSK health providers, including chiropractors, podiatrists, biokineticists, and osteopaths. This paucity accentuates the need for further exploration and evaluation of IPE within MSK-specific contexts, crucial for addressing and mitigating the escalating global burden of MSK diseases.

14.
ACS Omega ; 8(36): 32740-32751, 2023 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-37720795

RESUMEN

The purpose of this study was to compare and explore the potential of two distinct lipases at industrial levels after their production using wheat bran substrate in solid-state fermentation. Lipases from Candida albicans (C. albicans) and Acremonium sclerotigenum (A. sclerotigenum) were characterized to assess their compatibility and suitability for use in laundry detergents. The effects of pH, temperature, metal ions, inhibitors, organic solvents, and various commercially available detergents on these lipases were studied in order to compare their activity and stability profiles and check their stain removal ability. Both lipases remained stable across the wide pH (7-10) and temperature (30-50 °C) ranges. C. albicans lipase exhibited optimum activity (51.66 U/mL) at pH 7.0 and 37 °C, while A. sclerotigenum lipase showed optimum activity (52.12 U/mL) at pH 8.0 and 40 °C. The addition of Ca2+ and Mg2+ ions enhanced their activities, while sodium dodecyl sulfate (SDS) and ethylenediamine tetraacetic acid (EDTA) reduced their activities. Lipase from both strains showed tolerance to various organic solvents and considerable stability and compatibility with commercially available laundry detergents (>50%); however, A. sclerotigenum lipase performed slightly better. Characterization of these crude lipases showed nearly 60% relative activity after incubation for 2 h in various detergents, thus suggesting their potential to be employed in the formulation of laundry detergents with easy and efficient enzyme production. The production of thermostable and alkaline lipases from both strains makes them an attractive option for economic gain by lowering the amount of detergent to be used, thus reducing the chemical burden on the environment.

15.
ANZ J Surg ; 93(4): 951-955, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-36368701

RESUMEN

AIM: The aim of this study was to clarify the length of the bowel specimen and to assess if the length was affected by certain characteristics. METHODS: Eligible patients were adults who had undergone right hemicolectomy for cancer in caecum, appendix, ascending colon or transverse colon from September 2019 to September 2020 at Herlev Hospital, Denmark. Data were collected from medical records. The primary outcome was the length of the resected terminal ileum. Secondary outcomes were to assess if body mass index (BMI), surgical approach, and neoadjuvant chemotherapy affected the length of the terminal ileum specimen, and to report the length of the colon specimen subdivided on the cancer locations. RESULTS: In total, 50 patients were included. The median age was 74 years (range 36-91), 30 patients (60%) were females, and BMI was median 26 (range 17-45). The variation in the length of terminal ileum specimen was median 5 cm (range 1-17). The explorative analyses showed significant positive correlation between the length of terminal ileum specimen and BMI (P = 0.050) but not surgical approach (P = 0.23) nor neoadjuvant chemotherapy (P = 0.51). The length of the colon specimen naturally differed according to the cancer location with a median length of 26 cm (range 14-90). CONCLUSION: We found a variation in the length of the terminal ileum specimen without an apparent explanation for this variation. The colon specimen also varied naturally according to cancer location.


Asunto(s)
Apéndice , Neoplasias del Colon , Laparoscopía , Adulto , Femenino , Humanos , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Masculino , Neoplasias del Colon/cirugía , Colectomía , Íleon/cirugía , Apéndice/cirugía , Estudios Retrospectivos
16.
Cells ; 12(20)2023 10 14.
Artículo en Inglés | MEDLINE | ID: mdl-37887295

RESUMEN

BACKGROUND: Genetic and epigenetic changes, oxidative stress and inflammation influence the rate of aging, which diseases, lifestyle and environmental factors can further accelerate. In accelerated aging (AA), the biological age exceeds the chronological age. OBJECTIVE: The objective of this study is to reappraise the AA concept critically, considering its weaknesses and limitations. METHODS: We reviewed more than 300 recent articles dealing with the physiology of brain aging and neurodegeneration pathophysiology. RESULTS: (1) Application of the AA concept to individual organs outside the brain is challenging as organs of different systems age at different rates. (2) There is a need to consider the deceleration of aging due to the potential use of the individual structure-functional reserves. The latter can be restored by pharmacological and/or cognitive therapy, environment, etc. (3) The AA concept lacks both standardised terminology and methodology. (4) Changes in specific molecular biomarkers (MBM) reflect aging-related processes; however, numerous MBM candidates should be validated to consolidate the AA theory. (5) The exact nature of many potential causal factors, biological outcomes and interactions between the former and the latter remain largely unclear. CONCLUSIONS: Although AA is commonly recognised as a perspective theory, it still suffers from a number of gaps and limitations that assume the necessity for an updated AA concept.


Asunto(s)
Envejecimiento , Estrés Oxidativo , Humanos , Envejecimiento/genética , Epigénesis Genética , Encéfalo , Inflamación/genética , Biomarcadores
17.
Biomedicines ; 11(7)2023 Jul 14.
Artículo en Inglés | MEDLINE | ID: mdl-37509638

RESUMEN

A high incidence and prevalence of neurodegenerative diseases and neurodevelopmental disorders justify the necessity of well-defined criteria for diagnosing these pathologies from brain imaging findings. No easy-to-apply quantitative markers of abnormal brain development and ageing are available. We aim to find the characteristic features of non-pathological development and degeneration in distinct brain structures and to work out a precise descriptive model of brain morphometry in age groups. We will use four biomedical databases to acquire original peer-reviewed publications on brain structural changes occurring throughout the human life-span. Selected publications will be uploaded to Covidence systematic review software for automatic deduplication and blinded screening. Afterwards, we will manually review the titles, abstracts, and full texts to identify the papers matching eligibility criteria. The relevant data will be extracted to a 'Summary of findings' table. This will allow us to calculate the annual rate of change in the volume or thickness of brain structures and to model the lifelong dynamics in the morphometry data. Finally, we will adjust the loss of weight/thickness in specific brain areas to the total intracranial volume. The systematic review will synthesise knowledge on structural brain change across the life-span.

18.
Biomedicines ; 11(9)2023 Aug 24.
Artículo en Inglés | MEDLINE | ID: mdl-37760815

RESUMEN

Deep learning (DL) is emerging as a successful technique for automatic detection and differentiation of spontaneous seizures that may otherwise be missed or misclassified. Herein, we propose a system architecture based on top-performing DL models for binary and multigroup classifications with the non-overlapping window technique, which we tested on the TUSZ dataset. The system accurately detects seizure episodes (87.7% Sn, 91.16% Sp) and carefully distinguishes eight seizure types (95-100% Acc). An increase in EEG sampling rate from 50 to 250 Hz boosted model performance: the precision of seizure detection rose by 5%, and seizure differentiation by 7%. A low sampling rate is a reasonable solution for training reliable models with EEG data. Decreasing the number of EEG electrodes from 21 to 8 did not affect seizure detection but worsened seizure differentiation significantly: 98.24 ± 0.17 vs. 85.14 ± 3.14% recall. In detecting epileptic episodes, all electrodes provided equally informative input, but in seizure differentiation, their informative value varied. We improved model explainability with interpretable ML. Activation maximization highlighted the presence of EEG patterns specific to eight seizure types. Cortical projection of epileptic sources depicted differences between generalized and focal seizures. Interpretable ML techniques confirmed that our system recognizes biologically meaningful features as indicators of epileptic activity in EEG.

19.
BMJ Open ; 13(7): e068608, 2023 07 14.
Artículo en Inglés | MEDLINE | ID: mdl-37451729

RESUMEN

BACKGROUND: The number of patients diagnosed with multiple sclerosis (MS) has increased significantly over the last decade. The challenge is to identify the transition from relapsing-remitting to secondary progressive MS. Since available methods to examine patients with MS are limited, both the diagnostics and prognostication of disease progression would benefit from the multimodal approach. The latter combines the evidence obtained from disparate radiologic modalities, neurophysiological evaluation, cognitive assessment and molecular diagnostics. In this systematic review we will analyse the advantages of multimodal studies in predicting the risk of conversion to secondary progressive MS. METHODS AND ANALYSIS: We will use peer-reviewed publications available in Web of Science, Medline/PubMed, Scopus, Embase and CINAHL databases. In vivo studies reporting the predictive value of diagnostic methods will be considered. Selected publications will be processed through Covidence software for automatic deduplication and blind screening. Two reviewers will use a predefined template to extract the data from eligible studies. We will analyse the performance metrics (1) for the classification models reflecting the risk of secondary progression: sensitivity, specificity, accuracy, area under the receiver operating characteristic curve, positive and negative predictive values; (2) for the regression models forecasting disability scores: the ratio of mean absolute error to the range of values. Then, we will create ranking charts representing performance of the algorithms for calculating disability level and MS progression. Finally, we will compare the predictive power of radiological and radiomical correlates of clinical disability and cognitive impairment in patients with MS. ETHICS AND DISSEMINATION: The study does not require ethical approval because we will analyse publicly available literature. The project results will be published in a peer-review journal and presented at scientific conferences. PROSPERO REGISTRATION NUMBER: CRD42022354179.


Asunto(s)
Esclerosis Múltiple Crónica Progresiva , Esclerosis Múltiple Recurrente-Remitente , Esclerosis Múltiple , Humanos , Esclerosis Múltiple/psicología , Recurrencia Local de Neoplasia , Revisiones Sistemáticas como Asunto , Metaanálisis como Asunto , Esclerosis Múltiple Crónica Progresiva/diagnóstico por imagen , Esclerosis Múltiple Recurrente-Remitente/diagnóstico por imagen
20.
Front Neurosci ; 16: 998875, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36389235

RESUMEN

While prefrontal cortex dysfunction has been implicated in high food cravings, other cortical regions, like the parietal cortex, are potentially also involved in regulating craving. This study explored the effects of stimulating the inferior parietal lobule (IPL) and dorsolateral prefrontal cortex (DLPFC) on food craving state and trait. Transcranial direct current stimulation (tDCS) was administered at 1.5 mA for 5 consecutive days. Participants received 20 min of IPL, DLPFC, or sham stimulation (SHAM) each day which consisted of two rounds of 10-min stimulation, divided by a 10-min mindfulness task break. In addition, we studied inhibition and subjective psychological aspects like body image and self-esteem state and trait. To decompose immediate and cumulative effects, we measured the following on days 1 and 5: inhibition through the Go/No-go task; and food craving, self-esteem, and body appreciation through a battery of questionnaires. We found that false alarm errors decreased in the participants receiving active stimulation in the DLPFC (DLPFC-group). In contrast, false alarm errors increased in participants receiving active stimulation in the IPL (IPL-group). At the same time, no change was found in the participants receiving SHAM (SHAM-group). There was a trending reduction in craving trait in all groups. Momentary craving was decreased in the DLPFC-group and increased in IPL-group, yet a statistical difference was not reached. According to time and baseline, self-esteem and body perception improved in the IPL-group. Furthermore, self-esteem trait significantly improved over time in the DLPFC-group and IPL-group. These preliminary results indicate that tDCS modulates inhibition in frontoparietal areas with opposite effects, enhancing it in DLPFC and impairing it in IPL. Moreover, craving is moderately linked to inhibition, self-esteem, and body appreciation which seem not to be affected by neuromodulation but may rely instead on broader regions as more complex constructs. Finally, the fractionated protocol can effectively influence inhibition with milder effects on other constructs.

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