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Benedetto V, Christian DL, McLoughlin ASR, Smith E, Miller C, Hill J, Lightbody CE, Watkins CL. Effects of physical fitness training on the mental and physical health of stroke survivors. Br J Neurosci Nurs 2023; 19:S16-S18. [PMID: 38031592 PMCID: PMC7615333 DOI: 10.12968/bjnn.2023.19.sup2.s16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
After a stroke, physical activity can be key in enhancing the rehabilitation of patients and preventing a secondary stroke. In this commentary, we critically appraise a systematic review which investigated how different types of physical fitness training impact on the mental and physical conditions of stroke survivors. Cardiorespiratory, resistance and mixed training (especially when including walking) can improve key outcomes such as the balance and mobility of stroke survivors, but the most suitable type of training depends on the individual needs and aims of the rehabilitation process. More research is needed to understand how the effects of the different types of training vary by considering the time between stroke and intervention onset, stroke severity, and the dose of intervention.
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Affiliation(s)
- V Benedetto
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- Methodological Innovation, Development, Adaptation and Support (MIDAS) Theme, NIHR Applied Research Collaboration North West Coast (ARC NWC)
| | - D L Christian
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- IMPlementation and Capacity building Team (IMPaCT), NIHR ARC NWC
| | - A S R McLoughlin
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- IMPlementation and Capacity building Team (IMPaCT), NIHR ARC NWC
| | - E Smith
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
| | - C Miller
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- IMPlementation and Capacity building Team (IMPaCT), NIHR ARC NWC
- School of Nursing, UCLan, Preston, UK
| | - J Hill
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- Methodological Innovation, Development, Adaptation and Support (MIDAS) Theme, NIHR Applied Research Collaboration North West Coast (ARC NWC)
| | - C E Lightbody
- School of Nursing, UCLan, Preston, UK
- Lancashire Teaching Hospitals NHS Foundation Trust
| | - C L Watkins
- Applied Health Research hub, University of Central Lancashire (UCLan), Preston, UK
- IMPlementation and Capacity building Team (IMPaCT), NIHR ARC NWC
- School of Nursing, UCLan, Preston, UK
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Abstract
Objective: To measure muscle tone in a cohort of patients 12 months after stroke and develop a preliminary model, using data recorded routinely after stroke, to predict who will develop spasticity. Design: A cohort study. Setting: Initially hospitalized but subsequently community-dwelling stroke survivors in Liverpool, United Kingdom. Subjects: One hundred and six consecutively presenting stroke patients surviving to 12 months. Main outcome measures: Spasticity measured at a range of joints using the Tone Assessment Scale. Results: The Tone Assessment Scale revealed spasticity in 38 (36%) patients and more severe spasticity in 21 (20%) of the 106 patients. Logistic regression analysis revealed that lower day 7 Barthel Index score and early arm or leg weakness were significant predictors of abnormal muscle tone; and lower day 7 Barthel Index score, left-sided weakness and ever smoked to be significant predictors of more severe muscle tone. Conclusions: Using the models, it may be possible to predict whether or not spasticity will develop in patients 12 months after stroke. The utility of the models is aided by their use of predictor variables that are routinely collected as part of stroke care in hospital and which are easy to measure. The models need testing prospectively in a new cohort of patients in order to test their validity, reliability and utility and to determine if other data could improve their efficiency.
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Affiliation(s)
- M J Leathley
- Stroke Team for Audit and Research, University Hospital Aintree, Liverpool, UK.
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Mart RJ, Errington RJ, Watkins CL, Chappell SC, Wiltshire M, Jones AT, Smith PJ, Allemann RK. BH3 helix-derived biophotonic nanoswitches regulate cytochrome c release in permeabilised cells. Mol Biosyst 2014; 9:2597-603. [PMID: 23942570 DOI: 10.1039/c3mb70246d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Dynamic physical interactions between proteins underpin all key cellular processes and are a highly attractive area for the development of research tools and medicines. Protein-protein interactions frequently involve α-helical structures, but peptides matching the sequences of these structures usually do not fold correctly in isolation. Therefore, much research has focused on the creation of small peptides that adopt stable α-helical structures even in the absence of their intended protein targets. We show that short peptides alkylated with azobenzene crosslinkers can be used to photo-stimulate mitochondrial membrane depolarization and cytochrome c release in permeabilised cells, the initial events of the intrinsic apoptosis pathway.
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Affiliation(s)
- Robert J Mart
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
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Thomas LH, French B, Burton CR, Sutton C, Forshaw D, Dickinson H, Leathley MJ, Britt D, Roe B, Cheater FM, Booth J, Watkins CL. Evaluating a systematic voiding programme for patients with urinary incontinence after stroke in secondary care using soft systems analysis and Normalisation Process Theory: findings from the ICONS case study phase. Int J Nurs Stud 2014; 51:1308-20. [PMID: 24656435 DOI: 10.1016/j.ijnurstu.2014.02.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 02/06/2014] [Accepted: 02/09/2014] [Indexed: 11/27/2022]
Abstract
BACKGROUND Urinary incontinence (UI) affects between 40 and 60% of people in hospital after stroke, but is often poorly managed in stroke units. OBJECTIVES To inform an exploratory trial by three methods: identifying the organisational context for embedding the SVP; exploring health professionals' views around embedding the SVP and measuring presence/absence of UI and frequency of UI episodes at baseline and six weeks post-stroke. DESIGN A mixed methods single case study included analysis of organisational context using interviews with clinical leaders analysed with soft systems methodology, a process evaluation using interviews with staff delivering the intervention and analysed with Normalisation Process Theory, and outcome evaluation using data from patients receiving the SVP and analysed using descriptive statistics. SETTING An 18 bed acute stroke unit in a large Foundation Trust (a 'not for profit' privately controlled entity not accountable to the UK Department of Health) serving a population of 370,000. PARTICIPANTS Health professionals and clinical leaders with a role in either delivering the SVP or linking with it in any capacity were recruited following informed consent. Patients were recruited meeting the following inclusion criteria: aged 18 or over with a diagnosis of stroke; urinary incontinence (UI) as defined by the International Continence Society; conscious; medically stable as judged by the clinical team and with incontinence classified as stress, urge, mixed or 'functional'. All patients admitted to the unit during the intervention period were screened for eligibility; informed consent to collect baseline and outcome data was sought from all eligible patients. RESULTS Organisational context: 18 health professionals took part in four group interviews. Findings suggest an environment not conducive to therapeutic continence management and a focus on containment of UI. Embedding the SVP into practice: 21 nursing staff took part in six group interviews. Initial confusion gave way to embedding of processes facilitated by new routines and procedures. Patient outcome: 43 patients were recruited; 28 of these commenced the SVP. Of these, 6/28 (21%) were continent at six weeks post-stroke or discharge. CONCLUSION It was possible to embed the SVP into practice despite an organisational context not conducive to therapeutic continence care. Recommendations are made for introducing the SVP in a trial context.
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Affiliation(s)
- L H Thomas
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK.
| | - B French
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - C R Burton
- School of Health Care Sciences, Bangor University, Gwynedd LL57 2EF, UK
| | - C Sutton
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - D Forshaw
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - H Dickinson
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - M J Leathley
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - D Britt
- Division of Primary Care, University of Liverpool, Brownlow Street, Liverpool L69 3GL, UK
| | - B Roe
- Evidence-Based Practice Research Centre, Edge Hill University, St Helens Road, Ormskirk L39 4QP, UK
| | - F M Cheater
- School of Nursing Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - J Booth
- School of Health, Glasgow Caledonian University, Cowcaddens Road, Glasgow G4 0BA, UK
| | - C L Watkins
- School of Health, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
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Barrett BH, Beck R, Binder C, Cook DA, Engelmann S, Greer RD, Kyrklund SJ, Johnson KR, Maloney M, McCorkle N, Vargas JS, Watkins CL. The right to effective education. Behav Anal 2012; 14:79-82. [PMID: 22478085 DOI: 10.1007/bf03392556] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The present study evaluated procedures to teach single and multiple intraverbal responses, and assessed whether intraverbals and tacts are functionally independent. A delayed echoic prompting procedure was used to assess transfer of stimulus control. Probes were interspersed among intraverbal training trials to measure the emergence of intraverbals that were not directly trained. Following intraverbal training, visual stimuli were presented to determine whether response topographies transferred to tact conditions. The results suggest that special training is necessary for the acquisition of intraverbal responding in retarded individuals, and provide some support for the functional independence of intraverbals and tacts at the time of acquisition.
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Watkins CL, Sayers EJ, Allender C, Barrow D, Fegan C, Brennan P, Jones AT. Co-operative membrane disruption between cell-penetrating peptide and cargo: implications for the therapeutic use of the Bcl-2 converter peptide D-NuBCP-9-r8. Mol Ther 2011; 19:2124-32. [PMID: 21934653 DOI: 10.1038/mt.2011.175] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Delivering apoptosis inducing peptides to cells is an emerging area in cancer and molecular therapeutics. Here, we have identified an alternative mechanism of action for the proapoptotic chimeric peptide D-NuBCP-9-r8. Integral to D-NuBCP-9-r8 is the Nur-77-derived D-isoform sequence fsrslhsll that targets Bcl-2, and the cell-penetrating peptide (CPP) octaarginine (r8) that is required for intracellular delivery. We find that the N-terminal phenylalanine of fsrslhsll acts in synergy with the cell-penetrating moiety to enhance peptide uptake at low nontoxic levels and cause rapid membrane blebbing and cell necrosis at higher (IC(50)) concentrations. These effects were not observed when a single phenylalanine-alanine mutation was introduced at the N-terminus of D-NuBCP-9-r8. Using primary samples from chronic lymphocytic leukemia (CLL) patients and cancer cell lines, we show that NuBCP-9-r8 induced toxicity, via membrane disruption, is independent of Bcl-2 expression. Overall, this study demonstrates a new mechanism of action for this peptide and cautions its use as a highly specific entity for targeting Bcl-2. For delivery of therapeutic peptides the work emphasizes that key amino acids in cargo, located several residues away from the cell-penetrating sequence, can significantly influence their cellular uptake and mode of action.
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Fricke T, Mart RJ, Watkins CL, Wiltshire M, Errington RJ, Smith PJ, Jones AT, Allemann RK. Chemical Synthesis of Cell-Permeable Apoptotic Peptides from in Vivo Produced Proteins. Bioconjug Chem 2011; 22:1763-7. [DOI: 10.1021/bc200338u] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Fricke
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Robert J. Mart
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Catherine L. Watkins
- School of Medicine,
- Welsh School of Pharmacy, Cardiff University, King Edward VII Avenue, Cardiff, CF10 3XF, United Kingdom
| | | | | | | | - Arwyn T. Jones
- Welsh School of Pharmacy, Cardiff University, King Edward VII Avenue, Cardiff, CF10 3XF, United Kingdom
| | - Rudolf K. Allemann
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, United Kingdom
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Abstract
As the first approved epidermal growth factor receptor (EGFR)-targeted therapy for nonsmall cell lung cancer (NSCLC), the clinical development of gefitinib was complex. Advances in scientific understanding of the target biology during its clinical development enabled the identification of a biomarker to define patients most likely to derive benefit from gefitinib. Initial phase II trials showed clinically meaningful anti-tumour activity in 12-18% of unselected pretreated patients with advanced NSCLC at the optimum biological dose (250 mg). Subgroup analyses of these and subsequent phase III trials in unselected patients suggested that EGFR mutation and some clinical characteristics associated with a higher incidence of EGFR mutation (Asian ethnicity, adenocarcinoma histology, never-smoking and female sex) were linked with increased response to gefitinib. Consequently, the IRESSA Pan-Asia Study (IPASS) was conducted in never-smokers or former light-smokers in East Asia who had adenocarcinoma of the lung. IPASS showed that EGFR mutation was the strongest predictor of improved progression-free survival (mutation-positive subgroup hazard ratio (HR) 0.48, 95% CI 0.36-0.64 (p<0.001, n = 261); mutation-negative subgroup HR 2.85, 95% CI 2.05-3.98 (p<0.001, n = 176); interaction test p<0.001) with gefitinib versus carboplatin/paclitaxel as first-line therapy for advanced NSCLC. Important lessons for the development of future personalised medicines are discussed.
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Fricke T, Mart RJ, Watkins CL, Jones AT, Allemann RK. Click chemistry for the generation of cell permeable apoptotic peptides. Drug Discov Today 2010. [DOI: 10.1016/j.drudis.2010.09.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Al-Soraj MH, Watkins CL, Vercauteren D, De Smedt S, Braeckmans K, Jones AT. siRNA versus pharmacological inhibition of endocytic pathways for studying cellular uptake of cell penetrating peptides and other drug delivery vectors. Drug Discov Today 2010. [DOI: 10.1016/j.drudis.2010.09.411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sweeney M, Watkins CL, Jones AT, Taggart MJ. Octaarginine mediated delivery of fluorescent cargo to human smooth muscle cells. Drug Discov Today 2010. [DOI: 10.1016/j.drudis.2010.09.367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Al-Soraj MH, Watkins CL, Vercauteren D, De Smedt SC, Braeckmans K, Jones AT. siRNA versus pharmacological inhibition of endocytic pathways for studying cellular uptake of cell penetrating peptides. J Control Release 2010; 148:e86-7. [DOI: 10.1016/j.jconrel.2010.07.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Watkins CL, Brennan P, Fegan C, Takayama K, Nakase I, Futaki S, Jones AT. Cellular uptake, distribution and cytotoxicity of the hydrophobic cell penetrating peptide sequence PFVYLI linked to the proapoptotic domain peptide PAD. J Control Release 2009; 140:237-44. [DOI: 10.1016/j.jconrel.2009.04.028] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Accepted: 04/25/2009] [Indexed: 10/20/2022]
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French B, Thomas LH, Leathley MJ, Sutton CJ, McAdam J, Forster A, Langhorne P, Price CIM, Walker A, Watkins CL. Repetitive task training for improving functional ability after stroke. Cochrane Database Syst Rev 2007:CD006073. [PMID: 17943883 DOI: 10.1002/14651858.cd006073.pub2] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND The active practice of task-specific motor activities is a component of current approaches to stroke rehabilitation. OBJECTIVES To determine if repetitive task training after stroke improves global, upper or lower limb function, and if treatment effects are dependent on the amount, type or timing of practice. SEARCH STRATEGY We searched the Cochrane Stroke Trials Register (October 2006), The Cochrane Library, MEDLINE, EMBASE, CINAHL, AMED, SportDiscus, Science Citation Index, Index to Theses, ZETOC, PEDro, and OT Seeker (to September 2006), and OT search (to March 2006). We also searched for unpublished/non-English language trials, conference proceedings, combed reference lists, requested information on bulletin boards, and contacted trial authors. SELECTION CRITERIA Randomised/quasi-randomised trials in adults after stroke, where the intervention was an active motor sequence performed repetitively within a single training session, aimed towards a clear functional goal, and where the amount of practice could be quantified. DATA COLLECTION AND ANALYSIS Two authors independently screened abstracts, extracted data and appraised trials. Assessment of methodological quality was undertaken for allocation concealment, blinding, loss to follow up and equivalence of treatment. We contacted trial authors for additional information. MAIN RESULTS Fourteen trials with 17 intervention-control pairs and 659 participants were included. PRIMARY OUTCOMES results were statistically significant for walking distance (mean difference (MD) 54.6, 95% CI 17.5 to 91.7); walking speed (standardised mean difference (SMD) 0.29, 95% CI 0.04 to 0.53); sit-to-stand (standard effect estimate 0.35, 95% CI 0.13 to 0.56); and of borderline statistical significance for functional ambulation (SMD 0.25, 95% CI 0.00 to 0.51), and global motor function (SMD 0.32, 95% CI -0.01 to 0.66). There were no statistically significant differences for hand/arm function, or sitting balance/reach. SECONDARY OUTCOMES results were statistically significant for activities of daily living (SMD 0.29, 95% CI 0.07 to 0.51), but not for quality of life or impairment measures. There was no evidence of adverse effects. Follow-up measures were not significant for any outcome at six or twelve months. Treatment effects were not modified by intervention amount or timing, but were modified by intervention type for lower limbs. AUTHORS' CONCLUSIONS Repetitive task training resulted in modest improvement in lower limb function, but not upper limb function. Training may be sufficient to impact on daily living function. However, there is no evidence that improvements are sustained once training has ended. The review potentially investigates task specificity rather more than repetition. Further research should focus on the type and amount of training, and how to maintain functional gain.
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Affiliation(s)
- B French
- University of Central Lancashire, Department of Nursing, Preston, UK, PR1 2HE.
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French B, Forster A, Langhorne P, Leathley MJ, McAdam J, Price CIM, Sutton CJ, Thomas LH, Walker A, Watkins CL. Repetitive task training for improving functional ability after stroke. THE COCHRANE DATABASE OF SYSTEMATIC REVIEWS 2006. [DOI: 10.1002/14651858.cd006073] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cantarini MV, Watkins CL, Growcott J, Hughes AM. An investigation of components of variance and tachyphylaxis in a placebo-controlled intravenous tyramine study. Br J Clin Pharmacol 2004; 57:657-60. [PMID: 15089820 PMCID: PMC1884499 DOI: 10.1111/j.1365-2125.2004.02069.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS To explore inter- and intra-volunteer variability for the dose of intravenous tyramine eliciting a 20 mmHg increase in systolic blood pressure from baseline (TYR20) and to evaluate potential tachyphylaxis. METHODS Twelve healthy volunteers received blinded placebo-controlled ascending and descending sequences of intravenous tyramine injections on two separate occasions. The TYR20 was derived by linear interpolation, using three interventions to deal with missing data. RESULTS Analysis of covariance (ancova) demonstrated no significant difference in TYR20 between sequences, regardless of the missing data methodology applied. Inter-volunteer variability was 2.4-3.4 times larger than within-volunteer variability. No evidence of tachyphylaxis was seen using either the sign test or generalized additive models. CONCLUSIONS Since inter-volunteer variability was greater than intra-volunteer variability, a crossover study design would be a more efficient study design, and the descending sequence of injections could be omitted since tachyphylaxis was not demonstrated.
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Affiliation(s)
- M V Cantarini
- Experimental Medicine Department, AstraZeneca, Macclesfield, Cheshire, UK.
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Abstract
OBJECTIVES To establish the prevalence of spasticity 12 months after stroke and examine its relationship with functional ability. DESIGN A cohort study of prevalence of spasticity at 12 months post stroke. SETTING Initially hospitalized but subsequently community-dwelling stroke survivors in Liverpool, UK. SUBJECTS One hundred and six consecutively presenting stroke patients surviving to 12 months. MAIN OUTCOME MEASURES Muscle tone measured at the elbow using the Modified Ashworth Scale and at several joints, in the arms and legs, using the Tone Assessment Scale; functional ability using the modified Barthel Index. RESULTS Increased muscle tone (spasticity) was present in 29 (27%) and 38 (36%) of the 106 patients when measured using the Modified Ashworth Scale and Tone Assessment Scale respectively. Combining the results from both scales produced a prevalence of 40 (38%). Those with spasticity had significantly lower Barthel scores at 12 months (p < 0.0001). CONCLUSION When estimating the prevalence of spasticity it is essential to assess both arms and legs, using both scales. Despite measuring tone at several joints, spasticity was demonstrated in only 40 (38%) patients, lower than previous estimates.
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Affiliation(s)
- C L Watkins
- School of Nursing, Midwifery and Health Visiting, University of Manchester, Manchester M13 9PL, UK.
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Gregson JM, Leathley MJ, Moore AP, Smith TL, Sharma AK, Watkins CL. Clinical measures: reliable or not? Age Ageing 2001; 30:86-7. [PMID: 11322682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
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Gregson JM, Leathley MJ, Moore AP, Smith TL, Sharma AK, Watkins CL. Reliability of measurements of muscle tone and muscle power in stroke patients. Age Ageing 2000; 29:223-8. [PMID: 10855904 DOI: 10.1093/ageing/29.3.223] [Citation(s) in RCA: 188] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES to establish the reliability of the modified Ashworth scale for measuring muscle tone in a range of muscle groups (elbow, wrist, knee and ankle; flexors and extensors) and of the Medical Research Council scale for measuring muscle power in the same muscle groups and their direct antagonists. DESIGN a cross-sectional study involving repeated measures by two raters. We estimated reliability using the kappa statistic with quadratic weights (Kw). SETTING an acute stroke ward, a stroke rehabilitation unit and a continuing care facility. SUBJECTS people admitted to hospital with an acute stroke-35 patients, median age 73 (interquartile range 65-80), 20 men and 15 women. RESULTS inter- and intra-rater agreement for the measurement of power was good to very good for all tested muscle groups (Kw = 0.84-0.96, Kw = 0.70-0.96). Inter- and intra-rater agreement for the measurement of tone in the elbow, wrist and knee flexors was good to very good (Kw = 0.73-0.96, Kw = 0.77-0.94). Inter- and intra-rater agreement for the measurement of tone in the ankle plantarflexors was moderate to good (Kw = 0.45-0.51, Kw = 0.59-0.64). CONCLUSIONS the Medical Research Council scale was reliable in the tested muscle groups. The modified Ashworth scale demonstrated reliability in all tested muscle groups except the ankle plantarflexors. If reliable measurement of tone at the ankle is required for a specific purpose (e.g. to measure the effect of therapeutic intervention), further work will be necessary.
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Affiliation(s)
- J M Gregson
- Department of Medicine for the Elderly, University Hospital, Aintree, Liverpool, UK
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Gregson JM, Leathley M, Moore AP, Sharma AK, Smith TL, Watkins CL. Reliability of the Tone Assessment Scale and the modified Ashworth scale as clinical tools for assessing poststroke spasticity. Arch Phys Med Rehabil 1999; 80:1013-6. [PMID: 10489001 DOI: 10.1016/s0003-9993(99)90053-9] [Citation(s) in RCA: 239] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To establish reliability of the Tone Assessment Scale and modified Ashworth scale in acute stroke patients. SETTING A North Liverpool university hospital. PATIENTS Eighteen men and 14 women admitted with acute stroke and still in hospital at the study start date (median age, 74 yrs; median Barthel score, 8). MAIN OUTCOME MEASURES The modified Ashworth scale and the Tone Assessment Scale. STUDY DESIGN The 32 patients were examined with both scales on the same occasion by two raters (interrater comparison) and on two occasions by one rater (intrarater comparison). RESULTS The reliability of the modified Ashworth scale was very good (kappa = .84 for interrater and .83 for intrarater comparisons). The reliability of the Tone Assessment Scale was not as strong as the modified Ashworth scale, with marked variability in the assessment of posture (kappa = .22 to .50 for interrater and .29 to .55 for intrarater comparisons) and associated reaction (kappa/kappaW = -.05 to .79 for interrater and .19 to .83 for intrarater comparisons). However, those aspects of the Tone Assessment Scale that addressed response to passive movement and that are scored similarly to the modified Ashworth scale showed good to very good interrater reliability (kappaW = .79 to .92) and good to very good intrarater reliability (kappaW = .72 to .86), except for the question related to movement at the ankle where agreement was only moderate (kappaW = .59). CONCLUSIONS The modified Ashworth scale is reliable. The section of the Tone Assessment Scale relating to response to passive movement is reliable at various joints, except the ankle. It may assist in studies on the prevalence of spasticity after stroke and the relationship between tone and function. Further development of a measure of spasticity at the ankle is required. The Tone Assessment Scale is not reliable for measuring posture and associated reactions.
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Affiliation(s)
- J M Gregson
- Stroke Team for Audit and Research, University Hospital, Aintree, Liverpool, United Kingdom
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Abstract
OBJECTIVE to audit risk-factor identification of fallers before and after an education programme and the insertion of a written checklist in medical notes. Risk-factor identification in a dedicated, computerized falls clinic was then examined. METHODS documentation of risk factors for falls was studied on wards and a self-auditing 'penless' clinic for fallers subsequently set up to generate reports for medical notes and letters for general practitioners. RESULTS risk-factor identification improved after the insertion of the checklist but remained relatively poor. A dedicated clinic allowed almost complete identification of risk factors. Of the first 112 patients (median age 82) seen in the clinic, 75 (67%) were housebound. Remediable risk factors--e.g. inappropriate medication (67%), unsatisfactory footwear (59%) and postural hypotension (17%)--were found in most. Thirty-three patients (29%) had difficulty with alarm raising. CONCLUSION ward-based intervention showed limited capacity to identify risk factors for falls: a dedicated clinic was more successful. The use of a portable computer with a programme to screen fallers for risk factors is worthy of consideration.
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Affiliation(s)
- C A Dyer
- Academic Department of Geriatric Medicine, University of Birmingham, The Hayward Building, Selly Oak Hospital, Raddlebarn Road, Selly Oak, Birmingham B29 6JD, UK.
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23
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Richards EW, Abu Khaled M, Watkins CL, Long CL. The effect of plasma solutes on total-body-water measurements via NMR. Nutrition 1991; 7:344-6. [PMID: 1804470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy has been reported as an alternative method for quantitating deuterium oxide concentrations in the evaluation of total-body-water in humans. However, the presence of dissolved plasma proteins results in an underestimation of deuterium NMR (2H-NMR) intensity ratios, thereby causing an overestimation (5-6%) of total-body-water (TBW) values determined from nonsublimed patient plasma samples. We demonstrate that plasma samples must be corrected for the volume percentage of water in plasma. Correction of initial 2H-NMR intensity ratios with a factor of 0.93 results in intensity ratios comparable to those determined from plasma samples subjected to vacuum sublimation to remove all plasma solutes.
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Affiliation(s)
- E W Richards
- Department of Research, Baptist Medical Center, Birmingham, Alabama 35211
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24
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Lacey JC, Thomas RD, Staves MP, Watkins CL. Stereoselective formation of bis(alpha-aminoacyl) esters of 5'-AMP suggests a primitive peptide synthesizing system with a preference for L-amino acids. Biochim Biophys Acta 1991; 1076:395-400. [PMID: 2001387 DOI: 10.1016/0167-4838(91)90482-f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In the biosynthesis of proteins, each amino acid passes from the aminoacyl adenylate to become an amino acid ester and finally a 2' (3') peptidyl ester of the AMP residue at the end of a tRNA. Consequently, the chemistry of protein synthesis is the chemistry of aminoacyl and peptidyl AMP. Our data has revealed properties of 5'-AMP and its esters which should allow the preferential catalytic synthesis of L-amino acid peptides via a bis(2', 3'-aminoacyl) ester intermediate. Results in this paper concern one step in the proposed process and show that preexisting Ac-L-Phe monoester reacts about 2.5-times faster to form diester than preexisting Ac-D-Phe monoester.
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Affiliation(s)
- J C Lacey
- Department of Biochemistry, University of Alabama, Birmingham
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25
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Abstract
We describe experiments here which show that chemical esterification of 5'-adenylic acid (5'-AMP) with N-acetyl D- or L-phenylalanine (Ac-D- or Ac-L-Phe) imidazolide occurs principally, if not exclusively, at the 2' position. Furthermore, in experiments with the formation of the 2'-3' diester with butyric acid and N-acetyl glycine (Ac-Gly), we found the second esterification was also predominantly at the 2' position. This means that mixed diesters can be predictably prepared with the positions of the substituents known. The results are consistent with a model for the preferential catalytic synthesis of L-based peptides via a 2'-3' diester intermediate of purine monoribonucleotides.
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Affiliation(s)
- J C Lacey
- Department of Biochemistry, University of Alabama, Birmingham 35294
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26
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Slease RB, Benear JB, Selby GB, Reitz CL, Hughes WL, Watkins CL, Epstein RB. High-dose combination alkylating agent therapy with autologous bone marrow rescue for refractory solid tumors. J Clin Oncol 1988; 6:1314-20. [PMID: 3045266 DOI: 10.1200/jco.1988.6.8.1314] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Twenty-six adults, ages 27 to 60, with refractory metastatic solid tumors were treated with high-dose cyclophosphamide (Cy) + carmustine (BCNU) at one of three escalating dose schedules followed by autologous bone marrow transplantation (ABMT). Toxicity was severe and dose-related, with the maximum tolerated dose for the combination determined to be Cy 160 mg/kg and BCNU 900 mg/m2. Median time to WBC recovery (greater than or equal to 1,000/microL) was 13 days post-ABMT (range, nine to 22 days) and to a platelet count of greater than or equal to 50,000/microL, 22 days (range, 13 to 83 days). Sixteen of 20 evaluable patients (80%) responded to therapy with at least 50% reduction in measurable tumor, and three patients achieved complete remission (CR). Responders included eight of nine evaluable patients with breast carcinoma, two of five with melanoma, two of two with sarcoma, and four of four with colon carcinoma. Response durations were short (median, 4 months), even for complete responders, and relapses generally occurred at sites of previous metastases. In order for this approach to have a more significant impact on overall survival, it may need to be applied earlier in the natural history of the malignancy.
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Affiliation(s)
- R B Slease
- University of Oklahoma Health Sciences Center, Oklahoma City 73190
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27
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Lacey JC, Hawkins AF, Thomas RD, Watkins CL. Differential distribution of D and L amino acids between the 2' and 3' positions of the AMP residue at the 3' terminus of transfer ribonucleic acid. Proc Natl Acad Sci U S A 1988; 85:4996-5000. [PMID: 3393527 PMCID: PMC281674 DOI: 10.1073/pnas.85.14.4996] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Amino acids esterified to the ribose group of 5'-adenylic acid (AMP) constantly migrate between the 2' and 3' positions of the ribose at a rate of several times per second, which is slower than the rate of peptide-bond synthesis (15-20 per sec). Because the contemporary protein-synthesizing system only incorporates amino acids into protein when they are at the 3' position of the AMP at the terminus of tRNA, the value of the equilibrium constant relative to the 2' and 3' positions is of considerable interest. Differences between D and L isomers in this regard might be especially revealing. We have used N-acetylaminoacyl esters of AMP as models for the 3' terminus of tRNA and find that glycine and the L amino acids consistently distribute predominantly to the 3' position (approximately equal to 67% 3', approximately equal to 33% 2'), but D amino acids distribute to that position generally to a lesser extent and in a manner inversely related to the hydrophobicity of the amino acid side chain. This consistency of the L amino acid preference for the 3' position, combined with the inconsistency of the D amino acid preference, may be one reason for the origin of our contemporary protein-synthesizing system, which forms the peptide bond preferentially with L amino acids and only when they are in the 3' position of the ribose moiety of the AMP residue at the 3' terminus of every tRNA.
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Affiliation(s)
- J C Lacey
- Department of Biochemistry, University of Alabama, Birmingham 35294
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28
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Abstract
A new deuterium nuclear magnetic resonance (2H NMR) method is described for determining total body water in humans. The method has been validated against a standard infrared absorption (IR) procedure using a tracer dose of deuterium oxide (2H2O) of approximately 10 g for each human subject. The precision and accuracy for the methods have been compared and found to be very similar. The advantages of the 2H NMR method over other presently available techniques that are based on 2H2O dilution are as follows: it is fast, accurate, needs only a small dose of 2H2O, can be done using any body fluid, and, most importantly, does not require any sample preparation.
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29
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Abu Khaled M, Watkins CL, Krumdieck CL. Inactivation of B12 and folate coenzymes by butyl nitrite as observed by NMR: implications on one-carbon transfer mechanism. Biochem Biophys Res Commun 1986; 135:201-7. [PMID: 3954771 DOI: 10.1016/0006-291x(86)90963-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The effects of butyl nitrite, a frequently used recreational drug, on methyl cobalamin and 5-methyl tetrahydrofolate were investigated by using 1H and 31P NMR spectroscopies. While no effect could be observed in organic solvents, strong interactions of butyl nitrite with the methyl cobalamin and 5-methyl tetrahydrofolate were found to occur in water. Butyl nitrite decomposes in water generating H+ and NO-2. The former protonates to give the "base-off" configuration of methyl cobalamin while the Co-CH3 bond is cleaved. Similarly, the methyl group at the 5N position and the pyrazine ring of 5-methyl tetrahydrofolate were found to be affected by butyl nitrite. The overall interaction of butyl nitrite with both coenzymes shows displacement of the methyl group and derivatization or destruction of the coenzymes that may lead to deficiencies of both B-12 and/or folates.
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30
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Abstract
We have synthesized the free amino acid adenylate anhydrides of phenylalanine, leucine, isoleucine and valine. These activated compounds are very labile at high pH, but at low pH they become more stable. Proton NMR spectra of these adenylates show that in every case, the hydrophobic side chains, even in these small molecules at low pH and low concentration, are associated with the "face" of the adenine ring. Although aromatic rings are known to associate with adenine in this fashion, to our knowledge this is the first report of an intercalative-type interaction of aliphatic side chains with nucleic acid bases. Since adenine is the most hydrophobic base, these interactions are of a hydrophobic character, and occur in spite of the fact that the adenine ring is protonated. These results may have implications regarding recognition processes in DNA-protein and RNA-protein interactions.
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Affiliation(s)
- J C Lacey
- Department of Biochemistry, University of Alabama, Birmingham 35294
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31
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Lacey JC, Hall LM, Mullins DW, Watkins CL. Chirally selective, intramolecular interaction observed in an aminoacyl adenylate anhydride. ORIGINS LIFE EVOL B 1985; 16:151-6. [PMID: 3835505 DOI: 10.1007/bf01809468] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
All earthly creatures use only L-amino acids in template directed protein synthesis. The reason for this exclusive use of the L-isomer is not yet apparent, although recent experiments by Usher and his colleagues have shown some stereoselectivity in the aminoacylation of di- and polynucleotides. We have separately reported on intramolecular interactions between hydrophobic amino acid side chains and the adenine ring in aminoacyl adenylates. There was a preferential association of Phe greater than Leu = Ile greater than Val with the adenine in these studies, but we made no attempts to address the question of D, L selectivity. Recently, in 1H NMR studies of N-acetylphenylalanyl adenylate anhydride, we noticed evidence that both D- and L-isomers of the amino acid were present and, furthermore, that one isomer seemed to be associating with the adenine ring more strongly than the other. Using HPLC, we have separated the two diastereoisomers and have enzymatically determined that the isomer which associates more strongly is the biologically important one, the L-isomer. We present those studies here and discuss the evolutionary significance of this finding.
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32
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Firth WJ, Messa A, Reid R, Wang RC, Watkins CL, Yielding LW. Identification of an acridine photoaffinity probe for trypanocidal action. J Med Chem 1984; 27:865-70. [PMID: 6737429 DOI: 10.1021/jm00373a010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Twenty-four acridine derivatives were screened for trypanocidal activity in Trypanosoma brucei in order to determine which structural features of the acridine molecule confer maximal antiparasitic activity. The synthesis of several new azidoacridine derivatives are also reported as well as an assessment of their value as possible photoaffinity probes for the study of acridine trypanocidal action. The most effective and selective acridine trypanocides, with and without irradiation, were the 3-amino-10-methylacridinium salt derivatives. With brief irradiation, one azidoacridine, 3-amino-6-azido-10-methylacridinium chloride, showed considerable trypanocidal activity at very limiting drug concentrations (10(-7)M) and warrants consideration as a possible photoaffinity probe.
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Graves DE, Watkins CL, Yielding LW. Ethidium bromide and its photoreactive analogues: spectroscopic analysis of deoxyribonucleic acid binding properties. Biochemistry 1981; 20:1887-92. [PMID: 7225364 DOI: 10.1021/bi00510a026] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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35
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Graves DE, Yielding LW, Watkins CL, Yielding KL. Synthesis, separation and characterization of the mono- and diazide analogs of ethidium bromide. Biochim Biophys Acta 1977; 479:98-104. [PMID: 911852 DOI: 10.1016/0005-2787(77)90129-0] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ethidium bromide is used to characterize nucleic acid secondary and tertiary structural properties and the biological consequences of drug interactions. The mono- and diazido analogs of ethidium have proven valuable as photoaffinity probes in chemical and biological studies on nucleic acids, since they render the ethidium-nucleic acid interaction covalent. Although both of these compounds have been synthesized previously, the published synthesis procedure for the monoazide is inadeqlate since a major portion of the product has been identified as the diazide analog. This lack of purity severely limits the usefulness for nucleic acid research. The procedure presented here for the synthesis, separation, purification and crystallization of these analogs should provide the quantities and quality of these important reagents needed to perform a variety of chemical and biological experiments.
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