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Riel H, Matthews M, Vicenzino B, Bandholm T, Thorborg K, Rathleff MS. Efficacy of live feedback to improve objectively monitored compliance to prescribed, home-based, exercise therapy-dosage in 15 to 19 year old adolescents with patellofemoral pain- a study protocol of a randomized controlled superiority trial (The XRCISE-AS-INSTRUcted-1 trial). BMC Musculoskelet Disord 2016; 17:242. [PMID: 27250984 PMCID: PMC4890272 DOI: 10.1186/s12891-016-1103-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 05/27/2016] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Patellofemoral pain is one of the most frequent knee conditions among adolescents with a prevalence of 7 %. Evidence-based treatment consists of patient education combined with hip and quadriceps strengthening. Recent evidence suggests that a large proportion of adolescents does not follow their exercise prescription, performing too few repetitions or too fast below the prescribed time under tension. Live feedback, such as a metronome or exercise games, has previously shown promising results in improving the quality of exercises. The aim of this study is to investigate if live feedback from a sensor (BandCizer™) and an iPad will improve the ability of adolescents with PFP to perform exercises as prescribed. METHODS This study is a randomized, controlled, participant-blinded, superiority trial with a 2-group parallel design. Forty 15 to 19 year old adolescents with patellofemoral pain will be randomized to receive either live visual and auditory feedback on time under tension or no feedback on time under tension during a 6-week intervention period. Adolescents will be instructed to perform three elastic band exercises. Feedback will be provided by BandCizer™ and an iPad. The adolescents perform the exercises twice a week unsupervised and once a week during a supervised group training session. The primary outcome will be the mean deviation of the prescribed time under tension per repetition in seconds during the course of the intervention. DISCUSSION Low compliance is a major problem among adolescents with patellofemoral pain. Providing the adolescents with real time feedback on time under tension from a sensor and an iPad could potentially help the adolescents perform the exercises as prescribed. This may increase the total exercise dosage they receive during treatment which may help improve patient outcomes. TRIAL REGISTRATION Registered at ClinicalTrials.gov (identifier: NCT02674841 ) on February 4(th) 2016.
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Abdullah S, Matthews M, Frank E, Doherty G, Gay G, Choudhury T. Automatic detection of social rhythms in bipolar disorder. J Am Med Inform Assoc 2016; 23:538-43. [PMID: 26977102 DOI: 10.1093/jamia/ocv200] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 11/25/2015] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE To evaluate the feasibility of automatically assessing the Social Rhythm Metric (SRM), a clinically-validated marker of stability and rhythmicity for individuals with bipolar disorder (BD), using passively-sensed data from smartphones. METHODS Seven patients with BD used smartphones for 4 weeks passively collecting sensor data including accelerometer, microphone, location, and communication information to infer behavioral and contextual patterns. Participants also completed SRM entries using a smartphone app. RESULTS We found that automated sensing can be used to infer the SRM score. Using location, distance traveled, conversation frequency, and non-stationary duration as inputs, our generalized model achieves root-mean-square-error of 1.40, a reasonable performance given the range of SRM score (0-7). Personalized models further improve performance with mean root-mean-square-error of 0.92 across users. Classifiers using sensor streams can predict stable (SRM score ≥3.5) and unstable (SRM score <3.5) states with high accuracy (precision: 0.85 and recall: 0.86). CONCLUSIONS Automatic smartphone sensing is a feasible approach for inferring rhythmicity, a key marker of wellbeing for individuals with BD.
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Hwang E, Matthews M, Browning JC. Purple-Grey Indurations with Linear and Arcuate Scarring on a Neonate. Pediatr Dermatol 2016; 33:223-4. [PMID: 27001322 DOI: 10.1111/pde.12762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Murnane EL, Cosley D, Chang P, Guha S, Frank E, Gay G, Matthews M. Self-monitoring practices, attitudes, and needs of individuals with bipolar disorder: implications for the design of technologies to manage mental health. J Am Med Inform Assoc 2016; 23:477-84. [PMID: 26911822 DOI: 10.1093/jamia/ocv165] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 10/05/2015] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE To understand self-monitoring strategies used independently of clinical treatment by individuals with bipolar disorder (BD), in order to recommend technology design principles to support mental health management. MATERIALS AND METHODS Participants with BD (N = 552) were recruited through the Depression and Bipolar Support Alliance, the International Bipolar Foundation, and WeSearchTogether.org to complete a survey of closed- and open-ended questions. In this study, we focus on descriptive results and qualitative analyses. RESULTS Individuals reported primarily self-monitoring items related to their bipolar disorder (mood, sleep, finances, exercise, and social interactions), with an increasing trend towards the use of digital tracking methods observed. Most participants reported having positive experiences with technology-based tracking because it enables self-reflection and agency regarding health management and also enhances lines of communication with treatment teams. Reported challenges stem from poor usability or difficulty interpreting self-tracked data. DISCUSSION Two major implications for technology-based self-monitoring emerged from our results. First, technologies can be designed to be more condition-oriented, intuitive, and proactive. Second, more automated forms of digital symptom tracking and intervention are desired, and our results suggest the feasibility of detecting and predicting emotional states from patterns of technology usage. However, we also uncovered tension points, namely that technology designed to support mental health can also be a disruptor. CONCLUSION This study provides increased understanding of self-monitoring practices, attitudes, and needs of individuals with bipolar disorder. This knowledge bears implications for clinical researchers and practitioners seeking insight into how individuals independently self-manage their condition as well as for researchers designing monitoring technologies to support mental health management.
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Matthews M, Rathleff M, Claus A, McPoil T, Nee R, Crossley K, Vicenzino B. Prognostic factors or treatment effect modifiers in patellofemoral pain: A systematic review. J Sci Med Sport 2015. [DOI: 10.1016/j.jsams.2015.12.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matthews M, Bernard S. Eutrophication and cyanobacteria in South Africa’s standing water bodies: A view from space. S AFR J SCI 2015. [DOI: 10.17159/sajs.2015/20140193] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Snyder J, Matthews M, Chien J, Chang PF, Sun E, Abdullah S, Gay G. MoodLight: Exploring Personal and Social Implications of Ambient Display of Biosensor Data. CSCW : PROCEEDINGS OF THE CONFERENCE ON COMPUTER-SUPPORTED COOPERATIVE WORK. CONFERENCE ON COMPUTER-SUPPORTED COOPERATIVE WORK 2015; 2015:143-153. [PMID: 30298141 DOI: 10.1145/2675133.2675191] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
MoodLight is an interactive ambient lighting system that responds to biosensor input related to an individual's current level of arousal. Changes in levels of arousal correspond to fluctuations in the color of light provided by the system, altering the immediate environment in ways intimately related to the user's private internal state. We use this intervention to explore personal and social implications of the ambient display of biosensor data. This study provides greater understanding of the ways in which the representations of personal informatics, with a focus on ambient feedback, influence our perceptions of ourselves and those around us.
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Patel A, Matthews M. Effectiveness of video-based teaching in the use of injectable fertility medications: a randomized controlled pilot study. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Matthews M, Horacek T, Olfert M, Koenings M, Shelnutt K, Stocker C, Golem D, Kattelmann K, Colby S, Franzen-Castle L, Brown O, Morrell J. Development, Validation and Implementation of the Health Density Vending Machine Audit Tool (HDVMAT). J Acad Nutr Diet 2014. [DOI: 10.1016/j.jand.2014.06.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Angstman K, Meunier M, MacLaughlin K, Oberhelman S, Rohrer J, Katzelnick D, Matthews M. EPA-0017 – Remission decreased outpatient visit counts in depressed primary care patients treated with collaborative care management or usual care. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)77535-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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61
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Matthews M, Bridges S. Does the use of dynamic elastomeric fabric scoliosis suits provide an improved and more user friendly option for early intervention in childhood scoliosis? SCOLIOSIS 2012. [PMCID: PMC3304956 DOI: 10.1186/1748-7161-7-s1-p3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Malain D, Regan P, Bradley D, Matthews M, Al-Sulaiti H, Santawamaitre T. An evaluation of the natural radioactivity in Andaman beach sand samples of Thailand after the 2004 tsunami. Appl Radiat Isot 2012; 70:1467-74. [DOI: 10.1016/j.apradiso.2012.04.017] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 03/29/2012] [Accepted: 04/17/2012] [Indexed: 11/27/2022]
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63
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Matthews M. Phyllis May Sykes. Assoc Med J 2012. [DOI: 10.1136/bmj.e4530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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64
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Al-Sulaiti H, Nasir T, Al Mugren K, Alkhomashi N, Al-Dahan N, Al-Dosari M, Bradley D, Bukhari S, Matthews M, Regan P, Santawamaitre T, Malain D, Habib A. Determination of the natural radioactivity levels in north west of Dukhan, Qatar using high-resolution gamma-ray spectrometry. Appl Radiat Isot 2012; 70:1344-50. [DOI: 10.1016/j.apradiso.2011.11.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Accepted: 11/04/2011] [Indexed: 11/29/2022]
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65
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Fink M, Conrad D, Matthews M, Browning JC. Primary ecthyma gangrenosum as a presenting sign of leukemia in a child. Dermatol Online J 2012; 18:3. [PMID: 22483514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
Ecthyma gangrenosum is a type of skin infection characterized by black eschars on an erythematous base. It most commonly occurs with pseudomonas infection in an immunocompromised setting. We present a case of primary ecthyma gangrenosum as the presenting sign of pre-B acute lymphoblastic leukemia (ALL) in a child.
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Fink M, Conrad D, Matthews M, Browning JC. Primary ecthyma gangrenosum as a presenting sign of leukemia in a child. Dermatol Online J 2012. [DOI: 10.5070/d34tm8z0gg] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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67
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Ahmed A, Matthews M, Browning JC. Verruca vulgaris in a plaque of acanthosis nigricans. Dermatol Online J 2011; 17:9. [PMID: 21696689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
Warts are common cutaneous tumors, induced by different strains of the human papilloma virus. Many people develop one or more warts in their lifetime, most of which resolve spontaneously. We present a case of multiple warts within a plaque of acanthosis nigricans probably related to autoinoculation.
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Ahmed A, Matthews M, Browning JC. Verruca vulgaris in a plaque of acanthosis nigricans. Dermatol Online J 2011. [DOI: 10.5070/d38c21m06r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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69
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Lane S, Clark R, Hurst B, Marsburn P, Matthews M, Usadi R. Comparison of three cannulas for hysterosalpingography: a prospective, randomized study. Fertil Steril 2010. [DOI: 10.1016/j.fertnstert.2010.07.817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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70
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Van Gerpen J, Saucier M, Matthews M. 300 ATTENUATING GAIT FREEZING AND STRIDE REDUCTION IN PARKINSONIAN PATIENTS WITH AN ATTACHABLE, ADJUSTABLE LASER (THE MOBILASER™): A PILOT TRIAL. Parkinsonism Relat Disord 2010. [DOI: 10.1016/s1353-8020(10)70301-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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71
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Liu J, Jacob C, Sheridan KJ, Al-Mosule F, Heaton BT, Iggo JA, Matthews M, Pelletier J, Whyman R, Bickley JF, Steiner A. The synthesis of, and characterization of the dynamic processes occurring in Pd(ii) chelate complexes of 2-pyridyldiphenylphosphine. Dalton Trans 2010; 39:7921-35. [DOI: 10.1039/b918162h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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72
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Matthews M, Raj J, Charissi C, Cockerell C. Cutaneous Congenital Plexiform Cellular Schwannoma: A Simulant of Malignant Peripheral Nerve Sheath Tumor of Childhood - A Case Report and Literature Review. J Cutan Pathol 2008. [DOI: 10.1111/j.0303-6987.2005.320eq.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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73
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Matthews M, Murphy B, Wharton J, Lian F, Oracion R, Sunga O, Cockerell C. Cutaneous Sparganosis: A Case Report and Literature Review. J Cutan Pathol 2008. [DOI: 10.1111/j.0303-6987.2005.320ep.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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74
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Matthews M, Doherty G, Sharry J, Fitzpatrick C. Mobile phone mood charting for adolescents. BRITISH JOURNAL OF GUIDANCE & COUNSELLING 2008. [DOI: 10.1080/03069880801926400] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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75
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Krasnow M, Matthews M, Shackel K. Evidence for substantial maintenance of membrane integrity and cell viability in normally developing grape (Vitis vinifera L.) berries throughout development. JOURNAL OF EXPERIMENTAL BOTANY 2008; 59:849-59. [PMID: 18272917 DOI: 10.1093/jxb/erm372] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fluorescein diacetate (FDA) was used as a vital stain to assay membrane integrity (cell viability) in mesocarp tissue of the developing grape (Vitis vinifera L.) berry in order to test the hypothesis that there is a substantial loss of compartmentation in these cells during ripening. This technique was also used to determine whether loss of viability was associated with symptoms of a ripening disorder known as berry shrivel. FDA fluorescence of berry cells was rapid, bright, and stable for over 1 h at room temperature. Confocal microscopy detected FDA staining through two to three intact surface cell layers (300-400 mum) of bisected berries, and showed that the fluorescence was confined to the cytoplasm, indicating the maintenance of integrity in both cytoplasmic as well as vacuolar membranes, and the presence of active cytoplasmic esterases. FDA clearly discriminated between living cells and freeze-killed cells, and exhibited little, if any, non-specific staining. Propidium iodide and DAPI, both widely used to assess cell viability, were unable to discriminate between living and freeze-killed cells, and did not specifically stain the nuclei of dead cells. For normally developing berries under field conditions there was no evidence of viability loss until about 40 d after veraison, and the majority (80%) of mesocarp cells remained viable past commercial harvest (26 degrees Brix). These results are inconsistent with current models of grape berry development which hypothesize that veraison is associated with a general loss of compartmentation in mesocarp cells. The observed viability loss was primarily in the locule area around the seeds, suggesting that a localized loss of viability and compartmentation may occur as part of normal fruit development. The cell viability of berry shrivel-affected berries was similar to that of normally developing berries until the onset of visible symptoms (i.e. shrivelling), at which time viability declined in visibly shrivelled berries. Berries with extensive shrivelling exhibited very low cell viability (15%).
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76
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Matthews M. Capability building and risk management: Lessons from Radiata. INNOVATION-ORGANIZATION & MANAGEMENT 2007. [DOI: 10.5172/impp.2007.9.2.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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77
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Joshi MS, Matthews M. Intrauterine infection of non-presenting twin: a rare occurrence. J OBSTET GYNAECOL 2007; 26:569-70. [PMID: 17000511 DOI: 10.1080/01443610600821663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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78
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Abstract
Treatment of scoliosis has been under discussion in relation to surgical intervention since the Boston brace was presented by Hall in 1976 (Hall et al. 1976; Watts et al. 1977). The effects of rigid bracing on thoracic skeletal integrity and the possible deformation of ribs due to the high localized pressure due to prolonged wear (Biorthex 1999; Coillard et al. 1999) have been highlighted. The lack of compliance (Houghton et al. 1987) has encouraged clinicians to investigate other options for non-surgical treatment. The Spinecor and Triac bracing systems have been developed as a result of this research; however, both of these orthoses had been designed with idiopathic scoliosis in mind. Little research has been done into the effects of bracing on the neuropathic curve. The use of dynamic Lycra garments in the treatment of neurological scoliosis offers the advantage of deformity correction without the bulk and discomfort of rigid braces. Recent clinical experience has shown that the Lycra suits have a positive effect in the treatment of scoliosis. This study discusses the treatment of a child presenting with a spinal tumour and although not truly of neurological presentation indicates that the garment can be used for the different scoliotic presentations.
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79
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Norris C, Matthews M. Correlation between hamstring muscle length and pelvic tilt range during forward bending in healthy individuals: An initial evaluation. J Bodyw Mov Ther 2006. [DOI: 10.1016/j.jbmt.2005.06.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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80
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Norris C, Matthews M. Inter-tester reliability of a self-monitored active knee extension test. J Bodyw Mov Ther 2005. [DOI: 10.1016/j.jbmt.2005.06.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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81
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Peacock K, Matthews M, Hurst B, Marshburn P. Effects of fibrin sealant on single layer uterine incision closure strength. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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82
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Proctor A, Matthews M, Hurst B, Marshburn P. Effect of early pregnancy progesterone supplementation on IVF pregnancy outcome. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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83
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Coen E, Rolland-Lagan AG, Matthews M, Bangham JA, Prusinkiewicz P. The genetics of geometry. Proc Natl Acad Sci U S A 2004; 101:4728-35. [PMID: 14960734 PMCID: PMC387316 DOI: 10.1073/pnas.0306308101] [Citation(s) in RCA: 171] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Although much progress has been made in understanding how gene expression patterns are established during development, much less is known about how these patterns are related to the growth of biological shapes. Here we describe conceptual and experimental approaches to bridging this gap, with particular reference to plant development where lack of cell movement simplifies matters. Growth and shape change in plants can be fully described with four types of regional parameter: growth rate, anisotropy, direction, and rotation. A key requirement is to understand how these parameters both influence and respond to the action of genes. This can be addressed by using mechanistic models that capture interactions among three components: regional identities, regionalizing morphogens, and polarizing morphogens. By incorporating these interactions within a growing framework, it is possible to generate shape changes and associated gene expression patterns according to particular hypotheses. The results can be compared with experimental observations of growth of normal and mutant forms, allowing further hypotheses and experiments to be formulated. We illustrate these principles with a study of snapdragon petal growth.
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Gilchrist IC, Matthews M, Gascho JA, Kunselman SJ. Intracoronary calcium channel-blocker is associated with earlier release of cardiac enzymes after coronary intervention. J Am Coll Cardiol 2003. [DOI: 10.1016/s0735-1097(03)80094-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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85
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Carpentieri DF, Nichols K, Chou PM, Matthews M, Pawel B, Huff D. The expression of WT1 in the differentiation of rhabdomyosarcoma from other pediatric small round blue cell tumors. Mod Pathol 2002; 15:1080-6. [PMID: 12379755 DOI: 10.1097/01.mp.0000028646.03760.6b] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The WT1 gene encodes a transcription factor implicated in normal and neoplastic development. The purpose of this study was to evaluate the diagnostic utility of a commercial WT1 antibody on a variety of pediatric small round blue cell tumors (SRBCT). A mouse monoclonal antibody (clone: 6F-H2, DAKO) raised against the N-terminal amino acids 1-181 of the human WT1 protein was tested. Microscopic sections from 66 specimens were stained using an antigen retrieval protocol with trypsin. The tumors included peripheral neuroectodermal tumors (PNET/Ewing's), neuroblastomas, desmoplastic small round cell tumors (DSRCT), lymphomas, Wilms' tumors, and rhabdomyosarcomas (RMS). One RMS case was investigated by Western blot analysis and RT-PCR to confirm the antibody specificity. A strong cytoplasmic staining was demonstrated in all RMS (11/11). The Western blot analysis confirmed the WT1 protein in the tissue, and the RT-PCR confirmed the presence of WT1 mRNA in the peripheral blood and tissue of one RMS patient. The Wilms' tumors had a variable nuclear and/or cytoplasmic positivity in most (17/24) cases. All PNET/Ewing's were negative. The nuclei of two lymphoblastic lymphomas stained strongly. A weak nuclear or cytoplasmic staining was reported in a few DSRCT (3/5), lymphomas (2/10), and neuroblastomas (2/8). This is a useful antibody in the differentiation of RMS from other SRBCTs. A strong cytoplasmic staining favors an RMS, and a strong nuclear staining is suggestive of a Wilms' tumor. A role for WT1 in the pathogenesis of rhabdomyosarcomas is raised. The limited sampling precludes any conclusions regarding the value of tissue or peripheral blood analysis for WT1 mRNA in patients with rhabdomyosarcoma.
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MESH Headings
- Animals
- Antibodies, Monoclonal
- Child
- DNA Primers/chemistry
- DNA, Neoplasm/genetics
- Diagnosis, Differential
- Humans
- Immunohistochemistry
- Kidney Neoplasms/genetics
- Kidney Neoplasms/metabolism
- Kidney Neoplasms/pathology
- Mice
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Rhabdomyosarcoma, Alveolar/genetics
- Rhabdomyosarcoma, Alveolar/metabolism
- Rhabdomyosarcoma, Alveolar/pathology
- Rhabdomyosarcoma, Embryonal/genetics
- Rhabdomyosarcoma, Embryonal/metabolism
- Rhabdomyosarcoma, Embryonal/pathology
- WT1 Proteins/genetics
- WT1 Proteins/immunology
- WT1 Proteins/metabolism
- Wilms Tumor/genetics
- Wilms Tumor/metabolism
- Wilms Tumor/pathology
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Matthews M. Dr. who? The case for credentialing. MANAGED CARE INTERFACE 2001; 14:40-6. [PMID: 11688092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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87
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Hasegawa TK, Matthews M, Gutmann M. Ethical issues of domestic violence. Response to ethical dilemma #37. TEXAS DENTAL JOURNAL 2001; 118:988-92. [PMID: 11764630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Hasegawa TK, Matthews M, Peltier B, Witherspoon D. The endodontist's painful dilemma. Response to ethical dilemma #36. TEXAS DENTAL JOURNAL 2001; 118:559-62. [PMID: 11494794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Matthews M, Heimler I, Fahy M, Radwanska E, Hutz R, Trewin A, Rawlins R. Effects of dioxin, an environmental pollutant, on mouse blastocyst development and apoptosis. Fertil Steril 2001; 75:1159-62. [PMID: 11384643 DOI: 10.1016/s0015-0282(01)01802-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To evaluate the effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD; dioxin) on mouse embryo development and apoptosis. DESIGN Controlled animal study. SETTING Academic research environment. ANIMAL(S) Female mice (CB6F1) at 3 to 6 weeks of age and proven breeders (C578B46). INTERVENTION(S) Mouse embryos were obtained at the morula stage and cultured to the blastocyst stage in a pharmacologic dose of TCDD (3.1 microM) or a control medium. The morphology was assessed, and staining for apoptosis was performed. Immunohistochemistry for the presence of aromatic hydrocarbon receptor (AhR) was performed in another set of morula-stage embryos. MAIN OUTCOME MEASURE(S) The number of embryos developing from the morula to the blastocyst stage and number of apoptotic blastomeres in control vs. TCDD culture conditions. RESULT(S) No statistically significant differences were observed in the percentage of embryos reaching the blastocyst stage: 80.9% (115 of 142) in the TCDD-treated group, vs. 82.9% (121 of 146) in the control group. There was also no difference in the degree of apoptosis: 22.6 +/- 7.3% apoptotic cells (TCDD) vs. 25.3 +/- 9.7% (controls). Staining indicated the slight presence of aromatic hydrocarbon receptor in the morula-stage mouse embryos. CONCLUSION(S) TCDD at 3.1 microM did not alter the development of early mouse morula to blastocysts and did not significantly induce apoptosis in vitro.
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Matthews M. A new lens. Through a colleague's eye. BRITISH JOURNAL OF PERIOPERATIVE NURSING : THE JOURNAL OF THE NATIONAL ASSOCIATION OF THEATRE NURSES 2001; 11:279-82. [PMID: 11892594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Just like other members of the wider community, medical practitioners experience disorders that require corrective surgery. Michael Matthews has been retired for more than 18 years. At one time he was in charge of a coronary care unit. Recently, the tables were turned on him, when he had to go back into hospital, this time as a patient for day surgery to remove a cataract and receive a replacement lens. Dr Matthews describes his experience of eye problems and of receiving his new lens.
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Hasegawa TK, Matthews M, George LA. The patient's errant checkbook. Response to ethical dilemma #35. TEXAS DENTAL JOURNAL 2001; 118:273-7. [PMID: 11404946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Shoulson I, Penney J, McDermott M, Schwid S, Kayson E, Chase T, Fahn S, Greenamyre JT, Lang A, Siderowf A, Pearson N, Harrison M, Rost E, Colcher A, Lloyd M, Matthews M, Pahwa R, McGuire D, Lew MF, Schuman S, Marek K, Broshjeit S, Factor S, Brown D, Feigin A, Mazurkiewicz J, Ford B, Jennings D, Dilllon S, Comella C, Blasucci L, Janko K, Shulman L, Wiener W, Bateman-Rodriguez D, Carrion A, Suchowersky O, Lafontaine AL, Pantella C, Siemers E, Belden J, Davies R, Lannon M, Grimes D, Gray P, Martin W, Kennedy L, Adler C, Newman S, Hammerstad J, Stone C, Lewitt P, Bardram K, Mistura K, Miyasaki J, Johnston L, Cha JH, Tennis M, Panniset M, Hall J, Tetrud J, Friedlander J, Hauser R, Gauger L, Rodnitzky R, Deleo A, Dobson J, Seeberger L, Dingmann C, Tarsy D, Ryan P, Elmer L, Ruzicka D, Stacy M, Brewer M, Locke B, Baker D, Casaceli C, Day D, Florack M, Hodgeman K, Laroia N, Nobel R, Orme C, Rexo L, Rothenburgh K, Sulimowicz K, Watts A, Wratni E, Tariot P, Cox C, Leventhal C, Alderfer V, Craun AM, Frey J, McCree L, McDermott J, Cooper J, Holdich T, Read B. A randomized, controlled trial of remacemide for motor fluctuations in Parkinson's disease. Neurology 2001; 56:455-62. [PMID: 11222787 DOI: 10.1212/wnl.56.4.455] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Preclinical studies suggest that glutamate antagonists help ameliorate motor fluctuations in patients with PD treated with levodopa. METHODS In a multicenter, randomized, double-blind, placebo-controlled, parallel-group, dose-ranging study, the authors assessed the safety, tolerability, and efficacy of the glutamate receptor blocker remacemide hydrochloride in 279 patients with motor fluctuations treated with levodopa. The primary objective was to assess the short-term tolerability and safety of four dosage levels of remacemide during 7 weeks of treatment. Patients were also monitored with home diaries and the Unified PD Rating Scale (UPDRS) to collect preliminary data on treatment efficacy. RESULTS Remacemide was well tolerated up to a dosage of 300 mg/d on a twice daily schedule and 600 mg/d on a four times daily schedule. The most common dosage-related adverse events were dizziness and nausea, as observed in previous studies of remacemide. The percent "on" time and motor UPDRS scores showed trends toward improvement in the patients treated with 150 and 300 mg/d remacemide compared with placebo-treated patients, although these improvements were not significant. CONCLUSION Remacemide is a safe and tolerable adjunct to dopaminergic therapy for patients with PD and motor fluctuations. Although this study had limited power to detect therapeutic effects, the observed improvement is consistent with studies of non-human primates with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced parkinsonian signs and symptoms. Additional studies are warranted to confirm these results over an extended period of observation, and to explore the potential neuroprotective effects of remacemide in slowing the progression of PD.
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Hasegawa TK, Matthews M. The specialist's gift. Response to Ethical Dilemma #32. TEXAS DENTAL JOURNAL 2001; 118:84-7. [PMID: 11404881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Coers J, Kagan JC, Matthews M, Nagai H, Zuckman DM, Roy CR. Identification of Icm protein complexes that play distinct roles in the biogenesis of an organelle permissive for Legionella pneumophila intracellular growth. Mol Microbiol 2000; 38:719-36. [PMID: 11115108 DOI: 10.1046/j.1365-2958.2000.02176.x] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Legionella pneumophila is a bacterial pathogen that can enter the human lung and grow inside alveolar macrophages. To grow within phagocytic host cells, the bacteria must create a specialized organelle that restricts fusion with lysosomes. Biogenesis of this replicative organelle is controlled by 24 dot and icm genes, which encode a type IV-related transport apparatus. To understand how this transporter functions, isogenic L. pneumophila dot and icm mutants were characterized, and three distinct phenotypic categories were identified. Our data show that, in addition to genes that encode the core Dot/Icm transport apparatus, subsets of genes are required for pore formation and modulation of phagosome trafficking. To understand activities required for virulence at a molecular level, we investigated protein-protein interactions. Specific interactions between different Icm proteins were detected by yeast two-hybrid and gel overlay analysis. These data support a model in which the IcmQ-IcmR complex regulates the formation of a translocation channel that delivers proteins into host cells, and the IcmS-IcmW complex is required for export of virulence determinants that modulate phagosome trafficking.
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Matthews M, Roy CR. Identification and subcellular localization of the Legionella pneumophila IcmX protein: a factor essential for establishment of a replicative organelle in eukaryotic host cells. Infect Immun 2000; 68:3971-82. [PMID: 10858211 PMCID: PMC101675 DOI: 10.1128/iai.68.7.3971-3982.2000] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The gram-negative respiratory pathogen Legionella pneumophila infects and grows within mammalian macrophages and protozoan host cells. Upon uptake into macrophages, L. pneumophila establishes a replicative organelle that avoids fusion with endocytic vesicles. There are 24 dot/icm genes on the L. pneumophila chromosome required for biogenesis of this vacuole. Many of the Dot/Icm proteins are predicted to be components of a membrane-bound secretion apparatus similar to type IV conjugal transfer systems. We have been investigating the function of L. pneumophila dot/icm gene products that do not have obvious orthologs in other type IV transfer systems, since these determinants could govern processes unique to phagosome biogenesis. The icmX gene product falls into this category. To understand the role of the IcmX protein in pathogenesis, we have detailed interactions between an L. pneumophila icmX deletion mutant and murine bone marrow-derived macrophages. These data demonstrate that icmX is required for biogenesis of the L. pneumophila replicative organelle. Immunoblot analysis indicates that the icmX gene product is a polypeptide with an estimated molecular mass of 50 kDa. The IcmX protein was localized to the bacterial periplasm, and periplasmic translocation was mediated by an N-terminal sec-dependent leader peptide. A truncated IcmX product was secreted into culture supernatants by wild-type L. pneumophila growing extracellularly in liquid media; however, transport of the IcmX protein into eukaryotic host cells was not detected. Proteins similar in molecular weight to IcmX were identified in other Legionella species by immunoblot analysis using a monoclonal antibody specific for L. pneumophila IcmX protein. From these data, we conclude that the IcmX protein is an essential component of the dot/icm secretion apparatus, and that a conserved mechanism of host cell parasitism exists for members of the Legionellaceae family.
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Harry TC, Matthews M, Salvary I. Indinavir use: associated reversible hair loss and mood disturbance. Int J STD AIDS 2000; 11:474-6. [PMID: 10919491 DOI: 10.1258/0956462001916146] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We present the case of a 55-year-old heterosexual man who had a generalized alopecia and mood changes associated with the antiretroviral protease inhibitor; indinavir within 6 months of use. This was reversed within 3 months of change of therapy to the protease inhibitor, nelfinavir with demonstrable changes in his Hospital Anxiety and Depression (HAD) scale scores.
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Suzuki H, Patel N, Matthews M, DelRossi AJ, Doolin EJ, Hewitt CW. Vascularized bone marrow transplantation: A new surgical approach using isolated femoral bone/bone marrow. J Surg Res 2000; 89:176-83. [PMID: 10729247 DOI: 10.1006/jsre.2000.5821] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Orthotopic composite tissue (limb) transplantation in rats is a unique model for vascularized bone marrow transplantation because bone marrow cells and bone marrow stroma are transplanted by microsurgical means, thus creating immediate bone marrow space and engraftment. However, it contains a skin component and other musculoskeletal tissues that complicate issues related to tolerance induction. MATERIALS AND METHODS To study only aspects of vascularized bone marrow transplantation, we created a new isolated vascularized bone marrow transplant model in rats. The common iliac (or femoral) artery and vein were microsurgically anastomosed to the recipient abdominal aorta and inferior vena cava in an end-to-side fashion, respectively. Syngeneic male Lewis (RT1(1), n = 20) and allogeneic male BN (RT1(n), n = 10) donors were transplanted to female Lewis recipients. To establish rejection criteria, we examined histopathology and used the polymerase chain reaction (PCR) to assess microchimerism of donor male bone marrow cells in the peripheral blood of female recipients using rat Y chromosome (sex-determining region Y)-specific primers. RESULTS All recipients were healthy and remained stable without major complications for up to 300 days posttransplant. Morphologically, syngeneic male Lewis bone marrow showed a near-normal appearance. Allogeneic male BN bone marrow was clearly rejected. Male bone marrow cells were detected by PCR in the peripheral blood of all syngeneic recipients, but not in allogeneic blood specimens. CONCLUSIONS A new surgical approach to bone marrow transplantation was established. This consisted of the vascularized femoral bone/bone marrow transplant. Further analyses regarding the ability of vascularized femoral bone marrow transplants to induce systemic transplantation tolerance in adult rats will provide insights into not only various issues of immunology but also the potential clinical application of vascularized bone marrow transplantation.
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Segall P, Bürgmann R, Matthews M. Time-dependent triggered afterslip following the 1989 Loma Prieta earthquake. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999jb900352] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Matthews M, Meaden J, Petrak J, Shepstone L, Evans J. Psychological consequences of sexual assault among female attenders at a genitourinary medicine clinic. Sex Transm Infect 2000; 76:49-50. [PMID: 10817070 PMCID: PMC1760557 DOI: 10.1136/sti.76.1.49] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Abstract
The pain of migraine is notoriously difficult to manage. This article describes hypnotherapy as an effective intervention in a group of self-diagnosed migraine sufferers.
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