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1.
BMC Musculoskelet Disord ; 25(1): 480, 2024 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-38890668

RESUMO

Taping is increasingly used to manage proprioceptive deficits, but existing reviews on its impact have shortcomings. To accurately assess the effects of taping, a separate meta-analyses for different population groups and tape types is needed. Therefore, both between- and within-group meta-analyses are needed to evaluate the influence of taping on proprioception. According to PRISMA guidelines, a literature search was conducted across seven databases (Web of Science, PEDro, Pubmed, EBSCO, Scopus, ERIC, SportDiscus, Psychinfo) and one register (CENTRAL) using the keywords "tape" and "proprioception". Out of 1372 records, 91 studies, involving 2718 individuals, met the inclusion criteria outlined in the systematic review. The meta-analyses revealed a significant between and within-group reduction in repositioning errors with taping compared to no tape (Hedge's g: -0.39, p < 0.001) and placebo taping (Hedge's g: -1.20, p < 0.001). Subgroup and sensitivity analyses further confirmed the reliability of the overall between and within-group analyses. The between-group results further demonstrated that both elastic tape and rigid tape had similar efficacy to improve repositioning errors in both healthy and fatigued populations. Additional analyses on the threshold to detection of passive motion and active movement extent discrimination apparatus revealed no significant influence of taping. In conclusion, the findings highlight the potential of taping to enhance joint repositioning accuracy compared to no tape or placebo taping. Further research needs to uncover underlying mechanisms and refine the application of taping for diverse populations with proprioceptive deficits.


Assuntos
Fita Atlética , Propriocepção , Humanos , Propriocepção/fisiologia
2.
J Chem Inf Model ; 63(3): 910-927, 2023 02 13.
Artigo em Inglês | MEDLINE | ID: mdl-36525563

RESUMO

In the present work, we delineate the molecular mechanism of a bulky antibiotic permeating through a bacterial channel and uncover the role of conformational dynamics of the constriction loop in this process. Using the temperature accelerated sliced sampling approach, we shed light onto the dynamics of the L3 loop, in particular the F118 to S125 segment, at the constriction regions of the OmpF porin. We complement the findings with single channel electrophysiology experiments and applied-field simulations, and we demonstrate the role of hydrogen-bond stabilization in the conformational dynamics of the L3 loop. A molecular mechanism of permeation is put forward wherein charged antibiotics perturb the network of stabilizing hydrogen-bond interactions and induce conformational changes in the L3 segment, thereby aiding the accommodation and permeation of bulky antibiotic molecules across the constriction region. We complement the findings with single channel electrophysiology experiments and demonstrate the importance of the hydrogen-bond stabilization in the conformational dynamics of the L3 loop. The generality of the present observations and experimental results regarding the L3 dynamics enables us to identify this L3 segment as the source of gating. We propose a mechanism of OmpF gating that is in agreement with previous experimental data that showed the noninfluence of cysteine double mutants that tethered the L3 tip to the barrel wall on the OmpF gating behavior. The presence of similar loop stabilization networks in porins of other clinically relevant pathogens suggests that the conformational dynamics of the constriction loop is possibly of general importance in the context of antibiotic permeation through porins.


Assuntos
Antibacterianos , Porinas , Antibacterianos/farmacologia , Conformação Molecular , Porinas/química , Porinas/metabolismo , Hidrogênio
3.
J Biol Chem ; 293(18): 7030-7037, 2018 05 04.
Artigo em Inglês | MEDLINE | ID: mdl-29540483

RESUMO

The outer cell wall of the Gram-negative bacteria is a crucial barrier for antibiotics to reach their target. Here, we show that the chemical stability of the widely used antibiotic ampicillin is a major factor in the permeation across OmpF to reach the target in the periplasm. Using planar lipid bilayers we investigated the interactions and permeation of OmpF with ampicillin, its basic pH-induced primary degradation product (penicilloic acid), and the chemically more stable benzylpenicillin. We found that the solute-induced ion current fluctuation is 10 times higher with penicilloic acid than with ampicillin. Furthermore, we also found that ampicillin can easily permeate through OmpF, at an ampicillin gradient of 10 µm and a conductance of Gamp ≅ 3.8 fS, with a flux rate of roughly 237 molecules/s of ampicillin at Vm = 10 mV. The structurally related benzylpenicillin yields a lower conductance of Gamp ≅ 2 fS, corresponding to a flux rate of ≈120 molecules/s. In contrast, the similar sized penicilloic acid was nearly unable to permeate through OmpF. MD calculations show that, besides their charge difference, the main differences between ampicillin and penicilloic acid are the shape of the molecules, and the strength and direction of the dipole vector. Our results show that OmpF can impose selective permeation on similar sized molecules based on their structure and their dipolar properties.


Assuntos
Ampicilina/metabolismo , Antibacterianos/metabolismo , Permeabilidade da Membrana Celular , Escherichia coli/metabolismo , Porinas/metabolismo , Eletrodos , Bicamadas Lipídicas , Simulação de Dinâmica Molecular , Técnicas de Patch-Clamp , Espectroscopia de Prótons por Ressonância Magnética
4.
Biochem Biophys Res Commun ; 495(1): 1454-1460, 2018 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-29198700

RESUMO

Increasing antimicrobial drug resistance is a global threat especially with respect to Gram-negative bacteria. The low permeability of the bacterial outer cell wall has been identified as an important bottleneck that prevents a sufficient antibacterial effect to be achieved at low doses of the antibiotics. In particular, the outer membrane permeability for negatively charged molecules of the clinical important ESKAPE bacterium Pseudomonas aeruginosa is determined by the low conductance porins OprO and OprP Here we show that the alternative phosphonic-acid antibiotic fosfomycin is highly permeable through the OprO and OprP channels. For this, we applied an electrophysiological zero-current assay using concentration gradients of fosfomycin under tri-ionic conditions to quantify flux of fosfomycin through OprO and OprP. Our analyzes show that OprO, and to a lesser degree OprP, have unexpected very high permeability to fosfomycin, so the antibiotic should be a potentially excellent alternative choice for the control of Pseudomonas aeruginosa infections.


Assuntos
Proteínas de Bactérias/metabolismo , Permeabilidade da Membrana Celular/fisiologia , Fosfomicina/farmacocinética , Porinas/metabolismo , Pseudomonas aeruginosa/metabolismo , Análise do Fluxo Metabólico/métodos , Técnicas de Sonda Molecular , Especificidade por Substrato/fisiologia
5.
Biochem Biophys Res Commun ; 484(1): 51-55, 2017 02 26.
Artigo em Inglês | MEDLINE | ID: mdl-28109883

RESUMO

One of the major causes of antibiotic resistance in the Gram-negative bacteria is the low permeability across the outer membrane. Currently a main bottleneck in the development of effective antibiotics is the lack of a general method to quantify permeation which would allow screening for optimal scaffolds. Here, we present a permeation assay based on conventional electrophysiology. The method mainly involves application of concentration gradients of charged molecules with different electrophoretic mobilities through a membrane channel. Thus the unbalanced flux creates an electrostatic potential which provides direct information on relative ion fluxes. The experimental approach applied here involves measuring zero-current-potentials and the corresponding single channel conductance. For OmpC and the ß-lactamase inhibitor avibactam at a 10 µm gradient the calculated flux rate at Vm=0mV was about n=200 molecules/s per OmpC single pore.


Assuntos
Proteínas de Escherichia coli/metabolismo , Canais Iônicos/metabolismo , Porinas/metabolismo , Inibidores de beta-Lactamases/farmacologia , Bicamadas Lipídicas , Sondas Moleculares
6.
Membranes (Basel) ; 14(7)2024 Jul 20.
Artigo em Inglês | MEDLINE | ID: mdl-39057669

RESUMO

The alarming rise of antibiotic resistance in Gram-negative bacteria has emerged as a major global health challenge. A key factor contributing to this crisis is the low permeability of the bacterial outer membrane, which acts as a barrier that prevents antibiotics from entering the cell. Protein channels embedded in this outer membrane selectively regulate the influx of hydrophilic compounds, including antibiotics. To combat antibiotic resistance, understanding the molecular mechanisms governing antibiotic permeability through bacterial membrane channels is crucial. This knowledge is key towards elucidating their roles in studing antibiotic resistance. By compiling and analysing the flux data from multiple electrophysiological reversal potential experimental studies, which involves measuring zero-current potentials and the corresponding single-channel conductance, we can calculate the flux of charged antibiotics/compounds across different Gram-negative bacterial outer membrane channels. Through this comprehensive synthesis, this review aims to advance our understanding and stimulate discussions about the physicochemical factors influencing the flux of antibiotics through bacterial membrane protein channels, ultimately enhancing our knowledge in this area.

7.
Adv Rehabil Sci Pract ; 13: 27536351241271548, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39184216

RESUMO

The fear of falling is a pressing public health issue, yet current interventions often fall short in addressing it effectively. As a result, there is a need for innovative interventions that go beyond symptom relief to address the underlying causes. From this standpoint, we propose that limited exposure to floors and a lack of post-fall contingencies may contribute to the uncertainty that amplifies the fear of falling, particularly in fall prone populations. We explore the theoretical underpinnings of this hypothesis and propose a framework based on the Uncertainty and Anticipation model to elucidate potential connections. Building upon this, we introduce the Floor-hugging intervention-a two-part strategy designed to confront these challenges. Firstly, we propose gradual exposure to different floor scenarios through guided imagery to diminish fear by familiarizing individuals with such situations. Secondly, we advocate for the adoption of evidence-based ways to get up from the floor for developing after fall contingencies. We delve into the theoretical framework supporting our approach and its potential to reduce the fear of falling while improving physical, social, and psychological well-being. Additionally, we outline prospective outcome measures to comprehensively assess the impact of the intervention across biopsychosocial domains. This perspective aims to stimulate discussion on the potential role of floor exposure and post-fall strategies in reducing the fear of falling, while also advocating for innovative interventions to empower and protect fall-prone populations.

8.
Ann N Y Acad Sci ; 1536(1): 60-81, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38722733

RESUMO

Compression garments (CGs) are commonly used in rehabilitation and sports contexts to enhance performance and speed up recovery. Despite the growing use of CGs in recent decades, there is no unanimous consensus on their overall influence on joint proprioception. In this current meta-analysis, we aim to fill this knowledge gap by assessing the impact of CGs on joint proprioception. We conducted a literature search across seven databases and one registry. Ultimately, we included 27 studies with 671 participants. The meta-analysis revealed that wearing CGs resulted in a significant reduction in absolute error during joint position sensing (Hedges' g: -0.64, p = 0.006) as compared to no CGs. However, further analyses of variables such as constant error (p = 0.308), variable error (p = 0.541) during joint position sense tests, threshold to detect passive motion (p = 0.757), and active movement extent discrimination (p = 0.842) did not show a significant impact of CGs. The review also identified gaps in the reporting of certain outcomes, such as parameters of CGs, reporting of performance, individual-reported outcomes, and lack of placebo comparators. Consequently, this review provides guidelines for future studies that may facilitate evidence-based synthesis and ultimately contribute to a better understanding of the overall influence of CGs on joint proprioception.


Assuntos
Propriocepção , Humanos , Propriocepção/fisiologia , Vestuário
9.
ACS Infect Dis ; 10(1): 127-137, 2024 01 12.
Artigo em Inglês | MEDLINE | ID: mdl-38104323

RESUMO

The antibiotic fosfomycin (FOS) is widely recognized for the treatment of lower urinary tract infections with Escherichia coli and has lately gained importance as a therapeutic option to combat multidrug-resistant bacteria. However, resistance to FOS frequently develops through mutations reducing its uptake. Although the inner-membrane transport of FOS has been extensively studied in E. coli, its outer-membrane (OM) transport remains insufficiently understood. While evaluating minimal inhibitory concentrations in OM porin-deficient mutants, we observed that the E. coli ΔompFΔompC strain is four times more resistant to FOS than the wild type and the respective single mutants. Continuous monitoring of FOS-induced lysis of porin-deficient strains additionally highlighted the importance of LamB. The relevance of OmpF, OmpC, and LamB to FOS uptake was confirmed by electrophysiological and transcriptional analysis. Our study gives for the first time in-depth insight into the transport of FOS through the OM in E. coli.


Assuntos
Proteínas de Escherichia coli , Fosfomicina , Escherichia coli/genética , Escherichia coli/metabolismo , Fosfomicina/farmacologia , Transporte Biológico , Proteínas de Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Porinas/genética , Porinas/metabolismo
10.
BMC Sports Sci Med Rehabil ; 15(1): 138, 2023 Oct 20.
Artigo em Inglês | MEDLINE | ID: mdl-37864268

RESUMO

Taping is a common technique used to address proprioceptive deficits in both healthy and patient population groups. Although there is increasing interest in taping to address proprioceptive deficits, little is known about its effects on the kinetic aspects of proprioception as measured by force sense accuracy. To address this gap in the literature, the present systematic review and meta-analysis was conducted to evaluate the impact of taping on force sense accuracy. A search for relevant literature was conducted following PRISMA guidelines across seven databases and one register. Eleven studies with 279 participants were included in the review out of 7362 records. In the between-group analyses, we found a significant improvement in absolute (p < 0.01) and relative (p = 0.01) force sense accuracy with taping compared to no comparator. Likewise, a significant improvement in absolute (p = 0.01) force sense accuracy was also observed with taping compared to placebo tape. In the within group analysis, this reduction in the absolute (p = 0.11) force sense accuracy was not significant. Additional exploratory subgroup analyses revealed between group improvement in force sense accuracy in both healthy individuals and individuals affected by medial epicondylitis. The findings of this meta-analysis should be interpreted with caution due to the limited number of studies and a lack of blinded randomized controlled trials, which may impact the generalizability of the results. More high-quality research is needed to confirm the overall effect of taping on force sense accuracy.

11.
Children (Basel) ; 9(11)2022 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-36421201

RESUMO

The past decade has seen an increased interest in the implementation of auditory stimulation (AStim) for managing gait and postural deficits in people with cerebral palsy. Although existing reviews report beneficial effects of AStim on the spatiotemporal and kinematic parameters of gait, there are still numerous limitations that need to be addressed to correctly interpret these results. For instance, existing reviews have failed to characterize the effects of AStim by conducting separate between and within-group meta-analyses, these reviews have not evaluated the influence of AStim on postural outcomes, and nor have included several high-quality existing trials. In this study, we conducted between- and within-group meta-analyses to establish a state of evidence for the influence of AStim on gait and postural outcomes in people with cerebral palsy. We searched the literature according to PRISMA-P guidelines across 10 databases. Of 1414 records, 14 studies, including a total of 325 people with cerebral palsy, met the inclusion criterion. We report a significant enhancement in gait speed, stride length, cadence, and gross motor function (standing and walking) outcomes with AStim compared to conventional physiotherapy. The findings from this analysis reveal the beneficial influence of AStim on the spatiotemporal and kinematic parameters of gait and postural stability in people with cerebral palsy. Furthermore, we discuss the futurized implementation of smart wearables that can deliver person-centred AStim rehabilitation in people with cerebral palsy.

12.
Commun Biol ; 5(1): 1059, 2022 10 05.
Artigo em Inglês | MEDLINE | ID: mdl-36198902

RESUMO

Gram-negative porins are the main entry for small hydrophilic molecules. We studied translocation of structurally related cephalosporins, ceftazidime (CAZ), cefotaxime (CTX) and cefepime (FEP). CAZ is highly active on E. coli producing OmpF (Outer membrane protein F) but less efficient on cells expressing OmpC (Outer membrane protein C), whereas FEP and CTX kill bacteria regardless of the porin expressed. This matches with the different capacity of CAZ and FEP to accumulate into bacterial cells as quantified by LC-MS/MS (Liquid Chromatography Tandem Mass Spectrometry). Furthermore, porin reconstitution into planar lipid bilayer and zero current assays suggest permeation of ≈1,000 molecules of CAZ per sec and per channel through OmpF versus ≈500 through OmpC. Here, the instant killing is directly correlated to internal drug concentration. We propose that the net negative charge of CAZ represents a key advantage for permeation through OmpF porins that are less cation-selective than OmpC. These data could explain the decreased susceptibility to some cephalosporins of enterobacteria that exclusively express OmpC porins.


Assuntos
Cefalosporinas , Enterobacteriaceae , Cefepima/metabolismo , Cefotaxima/metabolismo , Ceftazidima , Cefalosporinas/farmacologia , Cromatografia Líquida , Escherichia coli/metabolismo , Bicamadas Lipídicas/metabolismo , Monobactamas/metabolismo , Porinas/química , Porinas/metabolismo , Espectrometria de Massas em Tandem
13.
Midwifery ; 89: 102785, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32570093

RESUMO

OBJECTIVE: The objective of this systematic integrative review was to review the literature in relation to problematic substance use (PSU) in midwifery populations. Associated aims were to aggregate existing knowledge about midwives and student midwives' personal engagement in PSU, to generate a holistic conceptualisation and synthesis of the existing literature regarding midwives and student midwives personally engaged in PSU and to present new understandings and perspectives to inform the development of future research questions. This review is the first of its kind. DESIGN: Systematic searches were conducted in CINAHL, Academic Search Complete, MEDLINE, PSYCInfo, Scopus and the Cochrane Library. Findings were grouped into themes and subthemes relating to both midwives and student midwives and then analysed critically in relation to the wider literature. A quality assessment was conducted using the Mixed Methods Appraisal Tool (MMAT). The PRISMA statement was used to guide reporting. SETTING: Included studies were conducted in Scotland, Ireland, Australia and New Zealand. PARTICIPANTS: Studies included a total of 6,182 participants. FINDINGS: A total of 3 studies were included. All included study types comprised quantitative survey designs, yet one also included a mixed methods design with the use of semi structured interviews. Two overarching themes emerged relating to both midwives and student midwives engaged in problematic substance use. For midwives, three subthemes are described: harmful daily alcohol consumption, working hours and harmful daily alcohol consumption and features associated with harmful daily alcohol consumption. For student midwives, two subthemes are presented: escape avoidance and alcohol, tobacco and cannabis use. KEY CONCLUSIONS: There is limited evidence available in relation to problematic substance use in midwifery populations in comparison to that available for other healthcare populations. Further research is required, and could usefully focus upon midwives and student midwives as distinct professions to be separated out from the wider healthcare workforce. IMPLICATIONS FOR PRACTICE: Problematic substance use among the healthcare workforce is associated with an increase in medical errors and inadequate care. Those affected can be reluctant to seek help, experience psychological distress and even contemplate suicide. Whilst evidence remains lacking for midwifery populations, they form a part of the general healthcare workforce and are exposed to similar workplace stressors. As such, it is likely that they too would be affected in similar ways.


Assuntos
Enfermeiros Obstétricos/psicologia , Estudantes de Enfermagem/psicologia , Transtornos Relacionados ao Uso de Substâncias/complicações , Humanos , Jurisprudência , Erros Médicos , Transtornos Relacionados ao Uso de Substâncias/psicologia
14.
Ann N Y Acad Sci ; 1478(1): 18-42, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-32659041

RESUMO

Virtual reality (VR)-based interventions are gaining widespread attention for managing neurological disorders such as stroke. A metastatistical consensus regarding the intervention is strongly warranted. In this study, we attempt to address this gap in the literature and provide the current state of evidence for the effects of VR on gait performance. We conducted both between- and within-group meta-analyses to provide a state of evidence for VR. Moreover, we conducted a search adhering to PRISMA guidelines on nine databases. Out of 1866 records, 32 studies involving a total of 809 individuals were included in this review. Considering all included studies, significant enhancements in gait parameters were observed with VR-based interventions compared with conventional therapy. A between-group meta-analysis reported beneficial significant medium effects of VR training on cadence (Hedge's g = 0.55), stride length ((STrL; Hedge's g = 0.46), and gait speed (Hedge's g = 0.30). Similarly, a within-group meta-analysis further revealed positive medium effects of VR on cadence (Hedge's g = 0.76), STrL (Hedge's g = 0.61), and gait speed (Hedge's g = 0.69). Additional subgroup analyses revealed beneficial effects of joint application of VR and robot-assisted gait training on gait speed (Hedge's g = 0.50). Collectively, findings from this review provide evidence for the effectiveness of VR-based gait training for stroke survivors.


Assuntos
Marcha/fisiologia , Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral/terapia , Realidade Virtual , Feminino , Humanos , Masculino , Equilíbrio Postural/fisiologia , Acidente Vascular Cerebral/radioterapia
15.
Sci Rep ; 9(1): 2183, 2019 02 18.
Artigo em Inglês | MEDLINE | ID: mdl-30778101

RESUMO

Gait dysfunctions are common post-stroke. Rhythmic auditory cueing has been widely used in gait rehabilitation for movement disorders. However, a consensus regarding its influence on gait and postural recovery post-stroke is still warranted. A systematic review and meta-analysis was performed to analyze the effects of auditory cueing on gait and postural stability post-stroke. Nine academic databases were searched according to PRISMA guidelines. The eligibility criteria for the studies were a) studies were randomized controlled trials or controlled clinical trials published in English, German, Hindi, Punjabi or Korean languages b) studies evaluated the effects of auditory cueing on spatiotemporal gait and/or postural stability parameters post-stroke c) studies scored ≥4 points on the PEDro scale. Out of 1,471 records, 38 studies involving 968 patients were included in this present review. The review and meta-analyses revealed beneficial effects of training with auditory cueing on gait and postural stability. A training dosage of 20-45 minutes session, for 3-5 times a week enhanced gait performance, dynamic postural stability i.e. velocity (Hedge's g: 0.73), stride length (0.58), cadence (0.75) and timed-up and go test (-0.76). This review strongly recommends the incorporation of rhythmic auditory cueing based training in gait and postural rehabilitation, post-stroke.


Assuntos
Transtornos Neurológicos da Marcha/reabilitação , Música , Reabilitação do Acidente Vascular Cerebral/métodos , Sinais (Psicologia) , Feminino , Marcha/fisiologia , Humanos , Masculino , Musicoterapia/métodos , Equilíbrio Postural/fisiologia , Postura/fisiologia , Acidente Vascular Cerebral/fisiopatologia
16.
Front Neurol ; 10: 21, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30761065

RESUMO

Patients undergoing chemotherapy, radiotherapy, and immunotherapy experience neurotoxic changes in the central and peripheral nervous system. These neurotoxic changes adversely affect functioning in the sensory, motor, and cognitive domains. Thereby, considerably affecting autonomic activities like gait and posture. Recent evidence from a range of systematic reviews and meta-analyses have suggested the beneficial influence of music-based external auditory stimulations i.e., rhythmic auditory cueing and real-time auditory feedback (sonification) on gait and postural stability in population groups will balance disorders. This perspective explores the conjunct implications of auditory stimulations during cancer treatment to simultaneously reduce gait and posture related deficits. Underlying neurophysiological mechanisms by which auditory stimulations might influence motor performance have been discussed. Prompt recognition of this sensorimotor training strategy in future studies can have a widespread impact on patient care in all areas of oncology.

17.
Front Neurol ; 10: 236, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30984095

RESUMO

Virtual-reality-based training can influence gait recovery in children with cerebral palsy. A consensus concerning its influence on spatiotemporal gait parameters and effective training dosage is still warranted. This study analyzes the influence of virtual-reality training (relevant training dosage) on gait recovery in children with cerebral palsy. A search was performed by two reviewers according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines on nine databases: PEDro, EBSCO, PubMed, Cochrane, Web of Science, EMBASE, ICI, Scopus, and PROQUEST. Of 989 records, 16 studies involving a total of 274 children with cerebral palsy met our inclusion criteria. Eighty-eight percent of the studies reported significant enhancements in gait performance after training with virtual reality. Meta-analyses revealed positive effects of virtual-reality training on gait velocity (Hedge's g = 0.68), stride length (0.30), cadence (0.66), and gross motor function measure (0.44). Subgroup analysis reported a training duration of 20-30 min per session, ≤4 times per week across ≥8 weeks to allow maximum enhancements in gait velocity. This study provides preliminary evidence for the beneficial influence of virtual-reality training in gait rehabilitation for children with cerebral palsy.

18.
Infect Drug Resist ; 11: 523-530, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29695921

RESUMO

Collective antibiotic drug resistance is a global threat, especially with respect to Gram-negative bacteria. The low permeability of the bacterial outer cell wall has been identified as a challenging barrier that prevents a sufficient antibiotic effect to be attained at low doses of the antibiotic. The Gram-negative bacterial cell envelope comprises an outer membrane that delimits the periplasm from the exterior milieu. The crucial mechanisms of antibiotic entry via outer membrane includes general diffusion porins (Omps) responsible for hydrophilic antibiotics and lipid-mediated pathway for hydrophobic antibiotics. The protein and lipid arrangements of the outer membrane have had a strong impact on the understanding of bacteria and their resistance to many types of antibiotics. Thus, one of the current challenges is effective interpretation at the molecular basis of the outer membrane permeability. This review attempts to develop a state of knowledge pertinent to Omps and their effective role in solute influx. Moreover, it aims toward further understanding and exploration of prospects to improve our knowledge of physicochemical limitations that direct the translocation of antibiotics via bacterial outer membrane.

19.
Front Neurol ; 9: 386, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29942278

RESUMO

Rhythmic auditory cueing has been shown to enhance gait performance in several movement disorders. The "entrainment effect" generated by the stimulations can enhance auditory motor coupling and instigate plasticity. However, a consensus as to its influence over gait training among patients with multiple sclerosis is still warranted. A systematic review and meta-analysis was carried out to analyze the effects of rhythmic auditory cueing in studies gait performance in patients with multiple sclerosis. This systematic identification of published literature was performed according to PRISMA guidelines, from inception until Dec 2017, on online databases: Web of science, PEDro, EBSCO, MEDLINE, Cochrane, EMBASE, and PROQUEST. Studies were critically appraised using PEDro scale. Of 602 records, five studies (PEDro score: 5.7 ± 1.3) involving 188 participants (144 females/40 males) met our inclusion criteria. The meta-analysis revealed enhancements in spatiotemporal parameters of gait i.e., velocity (Hedge's g: 0.67), stride length (0.70), and cadence (1.0), and reduction in timed 25 feet walking test (-0.17). Underlying neurophysiological mechanisms, and clinical implications are discussed. This present review bridges the gaps in literature by suggesting application of rhythmic auditory cueing in conventional rehabilitation approaches to enhance gait performance in the multiple sclerosis community.

20.
Neuropsychiatr Dis Treat ; 14: 43-59, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29339922

RESUMO

Auditory entrainment can influence gait performance in movement disorders. The entrainment can incite neurophysiological and musculoskeletal changes to enhance motor execution. However, a consensus as to its effects based on gait in people with cerebral palsy is still warranted. A systematic review and meta-analysis were carried out to analyze the effects of rhythmic auditory cueing on spatiotemporal and kinematic parameters of gait in people with cerebral palsy. Systematic identification of published literature was performed adhering to Preferred Reporting Items for Systematic Reviews and Meta-Analyses and American Academy for Cerebral Palsy and Developmental Medicine guidelines, from inception until July 2017, on online databases: Web of Science, PEDro, EBSCO, Medline, Cochrane, Embase and ProQuest. Kinematic and spatiotemporal gait parameters were evaluated in a meta-analysis across studies. Of 547 records, nine studies involving 227 participants (108 children/119 adults) met our inclusion criteria. The qualitative review suggested beneficial effects of rhythmic auditory cueing on gait performance among all included studies. The meta-analysis revealed beneficial effects of rhythmic auditory cueing on gait dynamic index (Hedge's g=0.9), gait velocity (1.1), cadence (0.3), and stride length (0.5). This review for the first time suggests a converging evidence toward application of rhythmic auditory cueing to enhance gait performance and stability in people with cerebral palsy. This article details underlying neurophysiological mechanisms and use of cueing as an efficient home-based intervention. It bridges gaps in the literature, and suggests translational approaches on how rhythmic auditory cueing can be incorporated in rehabilitation approaches to enhance gait performance in people with cerebral palsy.

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