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1.
Methods Mol Biol ; 2833: 145-152, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38949708

RESUMEN

Mycobacterium tuberculosis is an infectious pathogen that requires biosafety level-3 laboratory for handling. The risk of transmission is high to laboratory staff, and to manage the organism safely, it is necessary to construct high containment laboratory facilities at great expense. This limits the application of tuberculosis diagnostics to areas where there is insufficient capital to invest in laboratory infrastructure. In this method, we describe a process of inactivating sputum samples by either heat or guanidine thiocyanate (GTC) that renders them safe without affecting the quantification of viable bacteria. This method eliminates the need for level 3 containment laboratory for the tuberculosis molecular bacterial load assay (TB-MBLA) and is applicable in low- and middle-income countries.


Asunto(s)
Contención de Riesgos Biológicos , Mycobacterium tuberculosis , Esputo , Tiocianatos , Mycobacterium tuberculosis/aislamiento & purificación , Humanos , Contención de Riesgos Biológicos/métodos , Esputo/microbiología , Carga Bacteriana/métodos , Tuberculosis/diagnóstico , Tuberculosis/microbiología , Tuberculosis/prevención & control , Guanidinas , Calor , Viabilidad Microbiana
2.
Oncol Lett ; 28(2): 367, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38933810

RESUMEN

The present study aimed to assess the effectiveness of gastric transcatheter chemoembolization (GTC) combined with systemic chemotherapy (SYS) compared with SYS alone in managing dysphagia, and improving the quality of life (QoL) and nutritional status of patients with advanced gastric cardiac cancer (AGCC). A retrospective review was performed using data from consecutive patients with AGCC who experienced dysphagia and underwent either SYS alone or SYS combined with GTC from January 2018 to December 2022. Propensity score matching (PSM) analysis was performed to address potential confounding factors. Ogilvie dysphagia scores were used to assess dysphagia, the Functional Assessment of Cancer Therapy-General 7 (FACT-G7) was used to assess QoL, and the Patient-Generated Subjective Global Assessment (PG-SGA) was used to evaluate nutritional status. After PSM, a total of 228 patients were included in the analysis, with 114 in each group. At 4 and 8 weeks after the initial treatment, the GTC + SYS group demonstrated significantly lower median Ogilvie scores compared with the SYS alone group (P<0.001). Similarly, the median PG-SGA score at 4 weeks after the initial treatment was 2.0 in the GTC + SYS group and 6.0 in the SYS alone group. The median FACT-G7 scores in the GTC + SYS group was 13.0, compared with 10.5 in the SYS alone group. These differences remained significant at 8 weeks (P<0.001). In conclusion, the addition of GTC to SYS may more effectively and promptly relieve dysphagia, improve nutritional status and enhance QoL compared with SYS alone in patients with AGCC presenting with dysphagia.

3.
Expert Rev Clin Pharmacol ; 17(4): 393-401, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38349326

RESUMEN

BACKGROUND: Autonomic manifestations have been frequently studied in adults with epilepsy. Here, we evaluated cardiac autonomic (ANS) functions in children with epilepsy in the interictal period and determined the risks for their dysfunctions. RESEARCH DESIGN AND METHODS: This study included 60 patients (boys = 25; girls = 35 age: 14.53 ± 2.54 yrs) and 25 controls. Patients were well-controlled on antiseizure medications (ASMs). The battery of testing included measuring resting heart rate (HR) and blood pressure (BP), 30:15 ratio, HR variability (HRV) response to deep breathing, Valsalva ratio and BP changes in response to standing, isometric exercise and cold. RESULTS: Dizziness was reported in 25%. Autonomic dysfunctions were found in 45% (n = 27). Manifestations included high frequencies of abnormal 30:15 ratio (22%), HRV responses to deep breathing (45%), Valsalava ratio (45%), and BP responses to standing (35%), isometric exercise (27%) and cold (27%), indicating parasympathetic and sympathetic hypofunctions. There were positive correlations between parasympathetic and sympathetic dysfunctions. Logistic analysis showed that the durations of epilepsy and ASMs therapy were associated with ANS dysfunctions [95% CI: 0.895-4.719, p = 0.004]. CONCLUSIONS: Parasympathetic and sympathetic autonomic hypofunctions are common in children with epilepsy. This could be due to the depressant effect of sodium channel blocker ASMs on central and/or cardiac autonomic systems.


Asunto(s)
Epilepsia , Adulto , Masculino , Niño , Femenino , Humanos , Adolescente , Epilepsia/tratamiento farmacológico , Sistema Nervioso Autónomo , Presión Sanguínea
4.
Glycobiology ; 34(2)2024 Mar 26.
Artículo en Inglés | MEDLINE | ID: mdl-38039077

RESUMEN

Phosphatidyl-myo-inositol mannosides (PIMs), Lipomannan (LM), and Lipoarabinomannan (LAM) are essential components of the cell envelopes of mycobacteria. At the beginning of the biosynthesis of these compounds, phosphatidylinositol (PI) is mannosylated and acylated by various enzymes to produce Ac1/2PIM4, which is used to synthesize either Ac1/2PIM6 or LM/LAM. The protein PimE, a membrane-bound glycosyltransferase (GT-C), catalyzes the addition of a mannose group to Ac1PIM4 to produce Ac1PIM5, using polyprenolphosphate mannose (PPM) as the mannose donor. PimE-deleted Mycobacterium smegmatis (Msmeg) showed structural deformity and increased antibiotic and copper sensitivity. Despite knowing that the mutation D58A caused inactivity in Msmeg, how PimE catalyzes the transfer of mannose from PPM to Ac1/2PIM4 remains unknown. In this study, analyzing the AlphaFold structure of PimE revealed the presence of a tunnel through the D58 residue with two differently charged gates. Molecular docking suggested PPM binds to the hydrophobic tunnel gate, whereas Ac1PIM4 binds to the positively charged tunnel gate. Molecular dynamics (MD) simulations further demonstrated the critical roles of the residues N55, F87, L89, Y163, Q165, K197, L198, R251, F277, W324, H326, and I375 in binding PPM and Ac1PIM4. The mutation D58A caused a faster release of PPM from the catalytic tunnel, explaining the loss of PimE activity. Along with a hypothetical mechanism of mannose transfer by PimE, we also observe the presence of tunnels through a negatively charged aspartate or glutamate with two differently-charged gates among most GT-C enzymes. Common hydrophobic gates of GT-C enzymes probably harbor sugar donors, whereas, differently-charged tunnel gates accommodate various sugar-acceptors.


Asunto(s)
Simulación de Dinámica Molecular , Mycobacterium , Manosa/química , Simulación del Acoplamiento Molecular , Mycobacterium smegmatis/genética , Mycobacterium smegmatis/metabolismo , Lipopolisacáridos/química
5.
J Biol Chem ; 298(10): 102488, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36113580

RESUMEN

Rhamnose-rich cell wall polysaccharides (Rha-CWPSs) have emerged as crucial cell wall components of numerous Gram-positive, ovoid-shaped bacteria-including streptococci, enterococci, and lactococci-of which many are of clinical or biotechnological importance. Rha-CWPS are composed of a conserved polyrhamnose backbone with side-chain substituents of variable size and structure. Because these substituents contain phosphate groups, Rha-CWPS can also be classified as polyanionic glycopolymers, similar to wall teichoic acids, of which they appear to be functional homologs. Recent advances have highlighted the critical role of these side-chain substituents in bacterial cell growth and division, as well as in specific interactions between bacteria and infecting bacteriophages or eukaryotic hosts. Here, we review the current state of knowledge on the structure and biosynthesis of Rha-CWPS in several ovoid-shaped bacterial species. We emphasize the role played by multicomponent transmembrane glycosylation systems in the addition of side-chain substituents of various sizes as extracytoplasmic modifications of the polyrhamnose backbone. We provide an overview of the contribution of Rha-CWPS to cell wall architecture and biogenesis and discuss current hypotheses regarding their importance in the cell division process. Finally, we sum up the critical roles that Rha-CWPS can play as bacteriophage receptors or in escaping host defenses, roles that are mediated mainly through their side-chain substituents. From an applied perspective, increased knowledge of Rha-CWPS can lead to advancements in strategies for preventing phage infection of lactococci and streptococci in food fermentation and for combating pathogenic streptococci and enterococci.


Asunto(s)
Bacteriófagos , Pared Celular , Bacterias Grampositivas , Pared Celular/química , Bacterias Grampositivas/química , Bacterias Grampositivas/citología , Polisacáridos/química , Ramnosa , Ácidos Teicoicos/química , División Celular/fisiología
6.
Heliyon ; 8(6): e09618, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35756126

RESUMEN

The unpredictable nature of epileptic seizures makes it challenging to detect and effectively treat this disorder. The seizures are random, and most epileptic patients experience dangerous physical symptoms during an attack that renders the patient uneasy when conducting their daily tasks. This paper focuses on the generalised type of epilepsy, namely "Grand mal epilepsy Tonic-Clonic (GTC) seizure. The research aims to monitor symptoms of epileptic disease behaviour signals in humans and prevent it at its early stage of illness. To achieve this objective, we used the Electrocardiogram (ECG), Electromyography (EMG), accelerometer 3-axes for fall detection, and Dallas sensor for body temperature signals monitoring for updating the IoT system. The fuzzy logic algorithm that has been used to assess specified data set of diseased patients' parameters allows the classification into diverse types of seizures such as heart rate, body temperature, muscles spasm and falls. These are used as inputs to obtain the seizure type as an output which is then illustrated graphically on the dashboard of an IoT platform (Think-Speak), where abnormal conditions have been used to notify the medical personnel by sending an SMS message through "If This Then That" (IFTTT) technology. A prototype of an epileptic monitoring system has been successfully built and tested. It has an average accuracy of 98.90%, 95.49%, 83.0%, and 87.21% for body temperature, heart rate monitoring, muscle spasm, and fall detection.

7.
Sci Total Environ ; 834: 155306, 2022 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-35461946

RESUMEN

As the driving force behind the new wave of technological advancement, artificial intelligence (AI) paves the way for a new era of green economic growth. This paper uses the case of China and constructs a relevant mathematical model to propose the two-way impact of AI on green total factor productivity (GTFP) and systematically analyze the impact of AI on green economic growth. The main findings of this study are that AI has a significant "U-shaped" effect on GTFP, which was estimated using a nonlinear dynamic panel regression model. The analysis of regional heterogeneity shows that improving AI in resource-rich areas can boost GTFP and break the "resource curse". The "productivity paradox" arises, according to the industry heterogeneity analysis, because the current low level of intelligence in resource-intensive and labor-intensive industries fails to improve GTFP. This paper also breaks down GTFP into green technological progress and green efficiency improvement effects to figure out how AI affects green economic growth.


Asunto(s)
Inteligencia Artificial , Desarrollo Económico , China , Eficiencia , Industrias
8.
J Hazard Mater Adv ; 8: 100183, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36619826

RESUMEN

The COVID-19 pandemic highlighted public awareness of airborne disease transmission in indoor settings and emphasized the need for reliable air disinfection technologies. This increased awareness will carry in the post-pandemic era along with the ever-emerging SARS-CoV variants, necessitating effective and well-defined protocols, methods, and devices for air disinfection. Ultraviolet (UV)-based air disinfection demonstrated promising results in inactivating viral bioaerosols. However, the reported data diversity on the required UVC doses has hindered determining the best UVC practices and led to confusion among the public and regulators. This article reviews available information on critical parameters influencing the efficacy of a UVC air disinfection system and, consequently, the required dose including the system's components as well as operational and environmental factors. There is a consensus in the literature that the interrelation of humidity and air temperature has a significant impact on the UVC susceptibility, which translate to changing the UVC efficacy of commercialized devices in indoor settings under varying conditions. Sampling and aerosolization techniques reported to have major influence on the result interpretation and it is recommended to use several sampling methods simultaneously to generate comparable and conclusive data. We also considered the safety concerns and the potential safe alternative of UVC, far-UVC. Finally, the gaps in each critical parameter and the future research needs of the field are represented. This paper is the first step to consolidating literature towards developing a standard validation protocol for UVC air disinfection devices which is determined as the one of the research needs.

9.
J Food Biochem ; 45(11): e13951, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34569069

RESUMEN

Green tea (Camelia sinesis) has been acknowledged for plethora of pharmacological activities attributed by green tea catechins (GTC), however, poor bioavailability, short half-life and stability issues hamper its use as a therapeutic agent. Chitosan and sodium -tripolyphosphate were used to encapsulate GTC, which reduced its degradation in gastro-intestinal tract. The average size, zeta potential, and encapsulation efficiency of nano-encapsulated epigallocatechin-3-gallate (EGCG) rich GTC were observed as 250 nm, +49.8 mV, and 87%, respectively. The morphological and physico-chemical characterizations affirmed the size, stability, and encapsulation efficacy of nano-encapsulated green tea catechins. The In-vitro simulated release model showed the release of GTC in the intestinal phase via zero order kinetics. Cell viability studies were conducted on PC12 cell line to validate safety efficacy of nanoencapsulated GTC. Moreover, the study concluded that stability, bioavailability and bioactivity of EGCG was improved by nanoencapsulation of GTC, thereby rendering it a potent nanoceutical for clinical implications. PRACTICAL APPLICATIONS: Green tea catechin has enormous health endorsing activities. One of the major potentials of GTC is its antioxidant activity that plays a promising role in the prevention of various lethal disorders. In the present study, nanoencapsulation is used as a potential approach to improve the low bioavailability of green tea catechin. The results enlightened that nanoencapsulation of green tea catechin could be useful for improving the stability of green tea catechin in the GI tract as well as its bioaccessibility. Henceforth, this strategy restores the stability and bioavailability of green tea catechin that could be practically implied as a nutraceutical in the food and pharmaceutical industry as it can enhance the biological activity of catechins in catechin rich green tea-related products.


Asunto(s)
Catequina , , Antioxidantes/farmacología , Disponibilidad Biológica , Suplementos Dietéticos
10.
Epilepsy Behav Rep ; 16: 100462, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34189453

RESUMEN

Neuroinflammation has been considered an important pathophysiological process involved in epileptogenesis and may provide possibilities for new treatment possibilities. We present the case of a 45-year-old female with drug resistant epilepsy and progressive right-sided cerebral hemiatrophy associated with adult onset Rasmussen's encephalitis. Over a period of 26 years, she was treated with 14 different antiseizure medications, intravenous immunoglobulins, glucocorticosteroids, underwent two operations with focal resection and subpial transections, and tried out trigeminal nerve stimulation. Extensive blood tests, including antibodies relevant for autoimmune encephalitis, and brain biopsy did not show any signs of neuroinflammation. Eventually, the patient received the interleukin-1 receptor antagonist, anakinra. Within 1-2 days after injection, seizure frequency decreased significantly, and, after one week, the seizures stopped completely. Anakinra treatment was continued for 2 months. Stopping medication led to a relapse of seizures after 2 weeks, with a frequency of up to 45 seizures per day. Reintroduction of anakinra led to rapid recovery. Treatment with anakinra was continued for 7 months. The treatment was discontinued in April 2020, and the patient has been completely seizure free since then. There have been no other changes in antiseizure medication.

11.
J Med Virol ; 93(11): 6180-6190, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34138479

RESUMEN

Human adenovirus-F (HAdV-F) (genotype 40/41) is the second-most leading cause of pediatric gastroenteritis after rotavirus, worldwide, accounting for 2.8%-11.8% of infantile diarrheal cases. Earlier studies across eastern India revealed a shift in the predominance of genotypes from HAdV41 in 2007-09 to HAdV40 in 2013-14. Thus, the surveillance for HAdV-F genotypes in this geographical setting was undertaken over 2017-2020 to analyze the viral evolutionary dynamics. A total of 3882 stool samples collected from children (≤5 years) were screened for HAdV-F positivity by conventional PCR. The hypervariable regions of the hexon and the partial shaft region of long fiber genes were amplified, sequenced, and phylogenetically analyzed with respect to the prototype strains. A marginal decrease in enteric HAdV prevalence was observed (9.04%, n = 351/3882) compared to the previous report (11.8%) in this endemic setting. Children <2 years were found most vulnerable to enteric HAdV infection. Reduction in adenovirus-rotavirus co-infection was evident compared to the sole adenovirus infection. HAdV-F genotypes 40 and 41 were found to co-circulate, but HAdV41 was predominant. HAdV40 strains were genetically conserved, whereas HAdV41 strains accumulated new mutations. On the basis of a different set of mutations in their genome, HAdV41 strains segregated into 2 genome type clusters (GTCs). Circulating HAdV41 strains clustered with GTC1 of the fiber gene, for the first time during this study period. This study will provide much-needed baseline data on the emergence and circulation of HAdV40/41 strains for future vaccine development.


Asunto(s)
Infecciones por Adenovirus Humanos/virología , Adenovirus Humanos/clasificación , Adenovirus Humanos/genética , Gastroenteritis/virología , Filogenia , Infecciones por Adenovirus Humanos/epidemiología , Adenovirus Humanos/aislamiento & purificación , Preescolar , Diarrea/virología , Heces/virología , Femenino , Gastroenteritis/epidemiología , Genotipo , Humanos , India/epidemiología , Lactante , Recién Nacido , Masculino , Rotavirus/genética , Vacunas contra Rotavirus , Análisis de Secuencia de ADN , Desarrollo de Vacunas
12.
Seizure ; 86: 52-59, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33550134

RESUMEN

PURPOSE: Accurate characterization and quantification of seizure types are critical for optimal pharmacotherapy in epilepsy patients. Technological advances have made it possible to continuously monitor physiological signals within or outside the hospital setting. This study tested the utility of single-channel surface-electromyography (sEMG) for characterization of motor epileptic seizure semiology. METHODS: Seventy-one subjects were prospectively enrolled where vEEG and sEMG were simultaneously recorded. Three epileptologists independently identified and classified seizure events with upper-extremity (UE) motor activity by reviewing vEEG, serving as a clinical standard. Surface EMG recorded during the events identified by the clinical standard were evaluated using automated classification methods and expert review by a second group of three independent epileptologists (blinded to the vEEG data). Surface EMG classification categories included: tonic-clonic (TC), tonic only, clonic only, or other motor seizures. Both automated and expert review of sEMG was compared to the clinical standard. RESULTS: Twenty subjects experienced 47 motor seizures. Automated sEMG event classification methods accurately classified 72 % (95 % CI [0.57, 0.84]) of events (15/18 TC seizures, 5/9 tonic seizures, 1/3 clonic seizures, and 13/17 other seizures). Three independent reviewers' majority-rule analysis of sEMG correctly classified 81 % (95 % CI [0.67, 0.91]) of events (16/18 TC seizures, 8/9 tonic seizures, 1/3 clonic seizures, and 13/17 other manifestations). CONCLUSIONS: Continuous monitoring of sEMG data provides an objective measure to evaluate motor seizure activity. Using sEMG from a wearable monitor recorded from the biceps, automated and expert review may be used to characterize the semiology of events with UE motor activity, particularly TC and tonic seizures.


Asunto(s)
Electroencefalografía , Epilepsia , Convulsiones , Electromiografía , Humanos , Monitoreo Fisiológico , Convulsiones/diagnóstico
13.
Biol Direct ; 16(1): 4, 2021 01 12.
Artículo en Inglés | MEDLINE | ID: mdl-33436046

RESUMEN

BACKGROUND: The human proteins TMTC1, TMTC2, TMTC3 and TMTC4 have been experimentally shown to be components of a new O-mannosylation pathway. Their own mannosyl-transferase activity has been suspected but their actual enzymatic potential has not been demonstrated yet. So far, sequence analysis of TMTCs has been compromised by evolutionary sequence divergence within their membrane-embedded N-terminal region, sequence inaccuracies in the protein databases and the difficulty to interpret the large functional variety of known homologous proteins (mostly sugar transferases and some with known 3D structure). RESULTS: Evolutionary conserved molecular function among TMTCs is only possible with conserved membrane topology within their membrane-embedded N-terminal regions leading to the placement of homologous long intermittent loops at the same membrane side. Using this criterion, we demonstrate that all TMTCs have 11 transmembrane regions. The sequence segment homologous to Pfam model DUF1736 is actually just a loop between TM7 and TM8 that is located in the ER lumen and that contains a small hydrophobic, but not membrane-embedded helix. Not only do the membrane-embedded N-terminal regions of TMTCs share a common fold and 3D structural similarity with subgroups of GT-C sugar transferases. The conservation of residues critical for catalysis, for binding of a divalent metal ion and of the phosphate group of a lipid-linked sugar moiety throughout enzymatically and structurally well-studied GT-Cs and sequences of TMTCs indicates that TMTCs are actually sugar-transferring enzymes. We present credible 3D structural models of all four TMTCs (derived from their closest known homologues 5ezm/5f15) and find observed conserved sequence motifs rationalized as binding sites for a metal ion and for a dolichyl-phosphate-mannose moiety. CONCLUSIONS: With the results from both careful sequence analysis and structural modelling, we can conclusively say that the TMTCs are enzymatically active sugar transferases belonging to the GT-C/PMT superfamily. The DUF1736 segment, the loop between TM7 and TM8, is critical for catalysis and lipid-linked sugar moiety binding. Together with the available indirect experimental data, we conclude that the TMTCs are not only part of an O-mannosylation pathway in the endoplasmic reticulum of upper eukaryotes but, actually, they are the sought mannosyl-transferases.


Asunto(s)
Proteínas Portadoras/genética , Proteínas de la Membrana/genética , Secuencia de Aminoácidos , Proteínas Portadoras/química , Proteínas Portadoras/metabolismo , Secuencia Conservada , Humanos , Ligandos , Proteínas de la Membrana/química , Proteínas de la Membrana/metabolismo , Unión Proteica , Alineación de Secuencia
14.
Subcell Biochem ; 96: 259-271, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33252732

RESUMEN

Protein glycosylation is an essential covalent modification involved in protein secretion, stability, binding, folding, and activity. One or more sugars may be O-, N-, S-, or C-linked to specific amino acids by glycosyltransferases, which catalyze the transfer of these sugars from a phosphate-containing carrier molecule. Most glycosyltransferases are members of the GT-A, GT-B, or GT-C structural superfamilies. GT-C enzymes are integral membrane proteins that utilize a phospho-isoprenoid carrier for sugar transfer. To-date, two families of GT-Cs involved in protein glycosylation have been structurally characterized: the family represented by PglB, AglB, and Stt3, which catalyzes oligosaccharide transfer to Asn, and the family represented by Pmt1 and Pmt2, which catalyzes mannose transfer to Thr or Ser. This chapter reviews progress made over recent years on the structure and function of these two GT-C families.


Asunto(s)
Glicosiltransferasas/química , Glicosiltransferasas/clasificación , Glicosilación , Glicosiltransferasas/metabolismo , Humanos , Proteínas de la Membrana/química , Proteínas de la Membrana/metabolismo
15.
Epilepsy Behav Rep ; 14: 100384, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33089135

RESUMEN

Gorlin-Goltz syndrome, also known as nevoid basal cell carcinoma syndrome, is a genetic disorder with several neurological, cutaneous and skeletal manifestations. Epilepsy has been previously reported as a finding in Gorlin-Goltz syndrome but remains ill-described in the context of this disease. We report two new patients with Gorlin-Goltz syndrome featuring epilepsy and review the existing literature on the topic.

16.
Trends Analyt Chem ; 127: 115912, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32382202

RESUMEN

Nucleic acid amplification based detection plays an important role in food safety, environmental monitoring and clinical diagnosis. However, traditional nucleic acid detection process involves transferring liquid from one tube to another by pipetting. It requires trained persons, equipped labs and consumes lots of time. The ideal nucleic acid detection is integrated, closed, simplified and automated. Magnetic particles actuated by magnetic fields can efficiently adsorb nucleic acids and promote integrated nucleic acid assays without pipetting driven by pumps and centrifuges. We will comprehensively review magnetic particles assisted integrated system for nucleic acid detection and hope it can inspire further related study.

17.
Proc Nutr Soc ; 78(3): 340-350, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-30967168

RESUMEN

Some food bioactives potentially exert anti-obesity effects. Anthocyanins (ACN), catechins, ß-glucan (BG) and n-3 long chain PUFA (LCPUFA) are among the most promising candidates and have been considered as a strategy for the development of functional foods counteracting body weight gain. At present, clinical trials, reviews and meta-analyses addressing anti-obesity effects of various bioactives or bioactive-rich foods show contradictory results. Abdominal obesity is an important criterion for metabolic syndrome (MetS) diagnosis along with glucose intolerance, dyslipidaemia and hypertension. Food bioactives are supposed to exert beneficial effects on these parameters, therefore representing alternative therapy approaches for the treatment of MetS. This review summarises outcomes on MetS biomarkers in recent clinical trials supplementing ACN, catechins, BG and n-3 LCPUFA, focusing mainly on anti-obesity effects. Overall, it is clear that the level of evidence for the effectiveness varies not only among the different bioactives but also among the different putative health benefits suggested for the same bioactive. Limited evidence may be due to the low number of controlled intervention trials or to inconsistencies in trial design, i.e. duration, dose and/or the method of bioactive supplementation (extracts, supplements, rich or enriched food). At present, the question 'Are bioactives effective in weight management and prevention of metabolic syndrome?' remains inconclusive. Thus, a common effort to harmonise the study design of intervention trials focusing on the most promising bioactive molecules is urgently needed to strengthen the evidence of their potential in the treatment of obesity, MetS and related diseases.


Asunto(s)
Fármacos Antiobesidad , Metabolismo Energético , Síndrome Metabólico , Fitoquímicos , Antocianinas , Fármacos Antiobesidad/farmacología , Fármacos Antiobesidad/uso terapéutico , Catequina , Metabolismo Energético/efectos de los fármacos , Metabolismo Energético/fisiología , Ácidos Grasos Omega-3 , Humanos , Síndrome Metabólico/metabolismo , Síndrome Metabólico/fisiopatología , Síndrome Metabólico/terapia , Fitoquímicos/farmacología , Fitoquímicos/uso terapéutico , beta-Glucanos
18.
J Proteome Res ; 18(1): 301-308, 2019 01 04.
Artículo en Inglés | MEDLINE | ID: mdl-30394753

RESUMEN

Protein and RNA profiles are highly informative when generating a comprehensive understanding of the dynamics of complex biological systems. Quantitative correlations between protein and RNA profiles are not always high, yet simultaneous acquisition of both profiles remains challenging, in part because of the limited availability of samples and the inconvenience of separately preparing protein and RNA fractions. In a previous study, protein, DNA, and RNA fractions were simultaneously prepared from the same sample using phenol-guanidinium isothiocyanate reagent (P/GTC), although the performance of P/GTC-extracts in proteogenomic analyses remains poorly understood. We therefore evaluated the performance of the P/GTC-extraction method in proteogenomic analyses using standard HEK293-F cells and human peripheral blood neutrophils. The latter cell type is renowned for its extreme vulnerability to protein/RNA degradation, reflecting high protease and RNase activities. Our data indicate that the P/GTC extraction method provides superior protein profiles from neutrophil and HEK293-F cell samples for simultaneous preparation of RNA and protein, as compared with those from conventional protein extraction methods. The P/GTC extraction method therefore provides a powerful and robust tool for a broad range of proteogenomic studies.


Asunto(s)
Indicadores y Reactivos/química , Proteogenómica/métodos , Línea Celular , Células Cultivadas , Guanidinas , Células HEK293 , Humanos , Neutrófilos/química , Neutrófilos/citología , Fenol , Tiocianatos
19.
J Neurosurg ; : 1-11, 2018 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-30497188

RESUMEN

ObjectiveDisconnection of the cerebral hemispheres by corpus callosotomy (CC) is an established means to palliate refractory generalized epilepsy. Laser interstitial thermal therapy (LITT) is gaining acceptance as a minimally invasive approach to treating epilepsy, but this method has not been evaluated in clinical series using established methodologies to assess connectivity. The goal in this study was to demonstrate the safety and feasibility of MRI-guided LITT for CC and to assess disconnection by using electrophysiology- and imaging-based methods.MethodsRetrospective chart and imaging review was performed in 5 patients undergoing LITT callosotomy at a single center. Diffusion tensor imaging and resting functional MRI were performed in all patients to assess anatomical and functional connectivity. In 3 patients undergoing simultaneous intracranial electroencephalography monitoring, corticocortical evoked potentials and resting electrocorticography were used to assess electrophysiological correlates.ResultsAll patients had generalized or multifocal seizure onsets. Three patients with preoperative evidence for possible lateralization underwent stereoelectroencephalography depth electrode implantation during the perioperative period. LITT ablation of the anterior corpus callosum was completed in a single procedure in 4 patients. One complication involving misplaced devices required a second procedure. Adequacy of the anterior callosotomy was confirmed using contrast-enhanced MRI and diffusion tensor imaging. Resting functional MRI, corticocortical evoked potentials, and resting electrocorticography demonstrated functional disconnection of the hemispheres. Postcallosotomy monitoring revealed lateralization of the seizures in all 3 patients with preoperatively suspected occult lateralization. Four of 5 patients experienced > 80% reduction in generalized seizure frequency. Two patients undergoing subsequent focal resection are free of clinical seizures at 2 years. One patient developed a 9-mm intraparenchymal hematoma at the site of entry and continued to have seizures after the procedure.ConclusionsMRI-guided LITT provides an effective minimally invasive alternative method for CC in the treatment of seizures associated with drop attacks, bilaterally synchronous onset, and rapid secondary generalization. The disconnection is confirmed using anatomical and functional neuroimaging and electrophysiological measures.

20.
J Neurosurg ; 131(3): 781-789, 2018 10 26.
Artículo en Inglés | MEDLINE | ID: mdl-30497199

RESUMEN

OBJECTIVE: Radiofrequency thermocoagulation (RFTC), which has been developed for drug-resistant epilepsy patients, involves less brain tissue loss due to surgery, fewer surgical adverse effects, and generally good seizure control. This study demonstrates the effectiveness of RFTC performed at limited hippocampal locations. METHODS: Daily seizure diaries were prospectively maintained for at least 6 months by 9 patients (ages 30-59 years) with drug-resistant mesial temporal lobe epilepsy (MTLE) before treatment with RFTC. The limited target for stereotactic RFTC was chosen based on intraoperative electroencephalography (EEG) recording and was initially tested with a Radionics electrode at a low temperature, 45°C, for 60 seconds. The therapeutic RFTC heating parameters were 78°C-80°C for 90 seconds. All patients who received the RFTC treatment underwent both MRI and EEG recording immediately postoperatively and at the 3-month follow-up. Monthly outpatient clinic visits were arranged over 6 months to document seizure frequency and severity to clarify the changes noted in imaging studies and EEG patterns. RESULTS: Two patients were excluded from our analysis because one had undergone multiple seizure surgeries and the other had a poor recording of seizure frequency, before the RFTC surgery. Five and two patients underwent left-sided and right-sided RFTC, respectively. None of the patients had generalized tonic-clonic attacks postoperatively, and no adverse effects or complications occurred. According to MRI data, the effect of coagulation was limited to less than 1.0 cm in diameter and perifocal edema was also in limited range. The seizure frequency within 6 months decreased postoperatively with a mean reduction in seizures of 78% (range 36%-100%). Only two patients had a temporary increase in seizure frequency within 2 weeks of the surgery, and over 50% of all patients showed a decrease in average seizure frequency. CONCLUSIONS: The study results confirm that limited RFTC provides a more effective surgery with similar seizure control but fewer complications than resective surgery for drug-resistant MTLE patients.


Asunto(s)
Epilepsia Refractaria/cirugía , Electrocoagulación , Epilepsia del Lóbulo Temporal/cirugía , Hipocampo , Adulto , Epilepsia Refractaria/diagnóstico por imagen , Epilepsia Refractaria/fisiopatología , Electroencefalografía , Epilepsia del Lóbulo Temporal/diagnóstico por imagen , Epilepsia del Lóbulo Temporal/fisiopatología , Femenino , Estudios de Seguimiento , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Técnicas Estereotáxicas , Resultado del Tratamiento
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