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Birk, Manjot ; Chan, Vivien ; Yee, Nicholas J. ; [et al.]

CMA Impact Inc. ; 2023

In: Canadian Journal of Surgery Vol. 66, No. 4 Suppl 1 ( 2023-08-11), p. S1-S53

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In: Canadian Journal of Surgery, CMA Impact Inc., Vol. 66, No. 4 Suppl 1 ( 2023-08-11), p. S1-S53

Type of Medium: Online Resource

ISSN: 0008-428X , 1488-2310

URL: Article

DOI: 10.1503/cjs.006523

Language: English

Publisher: CMA Impact Inc.

Publication Date: 2023

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Canadian Spine SocietyPresentation CPSS1: Spinal insufficiency fracture in the geriatric pediatric spinePresentation CPSS2: The clinical significance of tether breakages in anterior vertebral body growth modulation: a 2-year postoperative analysisPresentation CPSS3: Anterior vertebral body growth modulation for idiopathic scoliosis: early, mid-term and late complicationsPresentation CPSS4: Ovine model of congenital chest wall and spine deformity with alterations of respiratory mechanics: follow-up from birth to 3 monthsPresentation CPSS5: Test–retest reliability and minimum detectable change of the English translation of the Italian Spine Youth Quality of Life questionnaire in adolescents with idiopathic scoliosisPresentation B1. Abstract 31: Incidence of delayed spinal cord injury in pediatric spine deformity surgery seems to be higher than previously assumedPresentation B2. Abstract 155: What is the optimal surgical method for achieving successful symptom relief in pediatric high-grade spondylolisthesis?Presentation B3. Abstract 47: Vertebral body tethering: Truly motion preserving or rather limiting?Presentation B4. Abstract 180: Fusion rates in pediatric patients after posterior cervical spine instrumentationPresentation B5. Abstract 102: Effects of 8 years of growth hormone treatment on the onset and progression of scoliosis in children with Prader–Willi syndromePresentation B6. Abstract 144: Klippel–Feil syndrome: clinical phenotypes associated with surgical treatmentPresentation B7. Abstract 123: Anterior release for idiopathic scoliosis: Is it necessary for curve correction?Presentation B8. Abstract 62: Severe scoliosis: Do we know a better way? A retrospective comparative studyPresentation B9. Abstract 21: Intraoperative skull femoral traction in adolescent idiopathic scoliosis: the correlation of traction with side-bending radiographsPresentation B10. Abstract 147: What is the effect of intraoperative halo-femoral traction on correction of adolescent idiopathic scoliosis?Presentation B11. Abstract 174: Extreme long-term outcome of surgically versus non-surgically treated patients with adolescent idiopathic scoliosisPresentation B12. Abstract 172: The influence of multilevel spinal deformity surgery on the clinical outcome in the elderly: a prospective, observational, multicentre studyPresentation B13. Abstract 49: Demographics of a prospective evaluation of elderly deformity surgery: a prospective international observational multicentre studyPresentation B14. Abstract 119: Timing of conversion to cervical malalignment and proximal junctional kyphosis following surgical correction of adult spinal deformityPresentation B15. Abstract 44: Prioritization of realignment associated with superior clinical outcomes for surgical cervical deformity patientsPresentation B16. Abstract 50: Outcome of multilevel spinal deformity surgery in patients over 60 years of age: a multicentre international prospective studyPresentation B17. Abstract 122: A simpler, modified frailty index weighted by complication occurrence correlates to pain and disability for adult spinal deformity patientsPresentation B18. Abstract 75: Change in Oswestry Disability Index at 24 months following multilevel spinal deformity surgery in patients over 60 years of age: a multicentre international prospective studyPresentation C19. Abstract 19: A prospective cohort study evaluating trends in the surgical treatment of degenerative spondylolisthesis in Canada and the utility of a novel surgical decision aidPresentation C20. Abstract 154: Decompression compared with decompression and fusion for degenerative lumbar spondylolisthesis: a Canadian Spine Outcomes and Research Network (CSORN) studyPresentation C21. Abstract ID 77: Lumbar degenerative spondylolisthesis: factors impacting decision to fusePresentation C22. Abstract 27: Patient-reported outcomes following surgery for lumbar disc herniation: comparison of a universal and multitier health care systemPresentation C23. Abstract 151: Do patients with recurrent lumbar disc herniations fair worse with discectomy than primary operations? A retrospective analysis from the Canadian Spine Outcomes and Research NetworkPresentation C24. Abstract 136: A province-wide assessment of the appropriateness of lumbar spine MRIPresentation D25. Abstract 32: Surgical site infection reduction — a 10-year quality improvement journeyPresentation D26. Abstract 34: The impact of frailty on patient-reported outcome measures following elective thoraco-lumbar spine surgeryPresentation D27. Abstract 8: Moving toward better health: exercise practice is associated with improved outcomes after spine surgeryPresentation D28. Abstract 33: Preoperative decolonization does not adversely affect the microbiologic spectrum of spine surgical site infectionPresentation D29. Abstract 61: Feedback: reducing after-hours spine cases using an encrypted messaging systemPresentation D30. Abstract 177: Complex spine surgery is safe and effective in the extremely elderly age group: results from an ambispective study of 722 patients over 75 years old from a single institutionPresentation E31. Abstract 38: Clinical predictors of achieving minimal clinically important difference after surgery for cervical spondylotic myelopathy: an external validation study from the Canadian Spine Outcomes and Research NetworkPresentation E32. Abstract 66: The natural history of degenerative cervical myelopathy: an ambispective longitudinal cohort studyPresentation E33. Abstract 159: Quantitative assessment of gait characteristics in degenerative cervical myelopathy (DCM): a prospective studyPresentation E34. Abstract 130: Prognostic factors in degenerative cervical myelopathy (DCM) for patients managed operatively and nonoperativelyPresentation E35. Abstract 175: Efficacy of surgical decompression in patients with cervical spondylotic myelopathy: results of a Canadian prospective multicentre studyPresentation E36. Abstract 67: Interobserver reliability of the modified Japanese Orthopedic Association (mJOA) score in degenerative cervical myelopathyPresentation F37. Abstract 128: Continuous optical monitoring of spinal cord hemodynamics during the first 7 days after injury in a porcine model of acute spinal cord injuryPresentation F38. Abstract 106: Development of a prediction model for central cord syndrome: an evaluation of motor recovery and the effectiveness of early surgery in a prospective, multicentre cohortPresentation F39. Abstract 135: Spinal cord dynamics under different clinical configurations of thoracolumbar burst fractures through numerical simulationsPresentation F40. Abstract 60: Predicting the heterogeneity of outcome following sensorimotor complete cervical spinal cord injury: trajectory-based analysis of 655 prospectively enrolled patientsPresentation F41. Abstract 167: Mortality in the year following discharge to the community from inpatient care for acute traumatic spinal cord injury: When and why?Presentation F42. Abstract 104: A novel method to classify patients with cervical incomplete spinal cord injury based on potential for recovery: a group-based trajectory analysis using prospective, multicentre data from over 800 patientsPresentation G43. Abstract 7: Responsiveness of standard spine outcome tools: Do they measure up?Presentation G44. Abstract 142: Patient outcomes: important psychological measuresPresentation G45. Abstract 84: Accuracy of surveillance for surgical site infections after spine surgery: a Bayesian latent class analysis using 4 independent data sourcesPresentation G46. Abstract 169: Econometric modelling: development of a surgical cost calculator for degenerative conditions of the lumbar spinePresentation G47. Abstract 124: The economic impact of nonreimbursable events in open, minimally invasive and robot-assisted lumbar fusion surgeryPresentation G48. Abstract 164: Are there sex differences in preoperative health status and health care delivery for patients

Missiuna, Paul ; Shen, Jesse ; Nahle, Imad ; [et al.]

CMA Impact Inc. ; 2020

In: Canadian Journal of Surgery Vol. 63, No. 4 Suppl 1 ( 2020-08), p. S6-S61

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In: Canadian Journal of Surgery, CMA Impact Inc., Vol. 63, No. 4 Suppl 1 ( 2020-08), p. S6-S61

Type of Medium: Online Resource

ISSN: 0008-428X , 1488-2310

URL: Article

DOI: 10.1503/cjs.014720

Language: English

Publisher: CMA Impact Inc.

Publication Date: 2020

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Canadian Spine SocietyAbstract 57. Radiographic reporting in adolescent idiopathic scoliosis: Is there a discrepancy comparing radiologists’ reports and surgeons’ assessments?Abstract 74. How useful is prereferral spine imaging? A quality improvement projectAbstract 82. Early recovery after surgery, predictors of shorter length of stayAbstract 68. Gliding screws on early-onset scoliosis: a 5-year experienceAbstract 66. Reliability of radiographic assessment of growth modulation from anterior vertebral body tethering surgery in pediatric scoliosisAbstract 16. A dangerous curve: impact of the COVID-19 pandemic on brace treatment in adolescent idiopathic scoliosisAbstract 24. Development of a model of interprofessional support interventions to enhance brace adherence in adolescents with idiopathic scoliosisAbstract 94. Recognizing the importance of self-image in adult spinal deformity: results from the Prospective Evaluation of Elderly Deformity Surgery (PEEDS)Abstract 25. Assessing pain as a primary factor in the surgical treatment of adult spinal deformity surgery in patients over 60 years of ageAbstract 72. Application of the Ames-International Spine Study Group (AMES) radiographic modifiers to an asymptomatic population. Are the thresholds for “normal” appropriate?Abstract 109. Exploring the relationship between cannabis and narcotic use on preoperative health considerations in Canadian thoracolumbar patients: a CSORN studyAbstract 36. Metastatic spine disease: Should patients with short life expectancy be denied surgical care? An international retrospective cohort studyAbstract 91. What do patients expect of palliative treatment for symptomatic spinal metastases? A qualitative studyAbstract 44. Denosumab for giant cell tumours of the spine: molecular predictors of clinical response — a pilot studyAbstract 89. Surgical management and outcomes from “stable” degenerative spondylolisthesis (DS) from the CSORN prospective DS study: What the @#$ % are we doing?Abstract 33. Economic consequences of waiting for lumbar disc herniation surgeryAbstract 108. Motor recovery depends on timing of surgery in patients with lumbar disc herniationAbstract 106. Outcomes following revision decompression for lumbar spinal stenosis when compared to primary decompression: a matched cohort analysis using the Canadian Spine Outcomes and Research Network registryAbstract 64. Patient engagement, remote monitoring and virtual care — a pilot project in rural and remote patients undergoing elective lumbar surgeryAbstract 84. Development of a frailty index from the Canadian Spine Outcomes and Research Network (CSORN) to predict long-term success of surgery for patients with degenerative pathologies of the spineAbstract 102. Posterolateral versus posterior interbody fusion for the management of lumbar degenerative spondylolisthesis: analysis from the CSORN prospective LDS propensity score matched studyAbstract 31. Impact on patient-reported outcomes of ending the posterior construct proximally at C2 versus C3 in degenerative cervical myelopathy patientsAbstract 42. Perioperative factors predict 2-year trajectories of pain and disability following anterior cervical discectomy and fusionAbstract 61. Calculating utilities from the modified Japanese Orthopaedic Association score: a prerequisite for quantifying the value of care for cervical myelopathyAbstract 119. Serum neurofilament light (NF-L) and glial fibrillary acidic protein (GFAP) biomarkers and their association with MRI findings in human acute traumatic spinal cord injuryAbstract 95. The Montreal Acute Classification of Spinal Cord Injury (MAC-SCI): a new tool to detect and characterize spinal cord injury in the trauma patientAbstract 118. Mechanism of injury is associated with neurologic outcomes after cervical sensorimotor complete acute traumatic spinal cord injuryAbstract 13. Patient perspective: diagnosis and prognosis of acute spinal cord injuriesAbstract 136. Predictive analytics to improve dedicated spine trauma operating room resource allocationAbstract 138. Machine learning models to predict surgical resident workload at a level 1 trauma centreAbstract 139. Machine learning to predict duration of surgery and length of stay for single-level discectomy proceduresAbstract 9. Outpatient spinal surgery in ManitobaAbstract 131. Unexpected positive culture in presumed aseptic revision spine surgery: a systematic review and meta-analysisAbstract 50. Lumbar anterior vertebral body tethering: biomechanical assessment of the surgical decision factors influencing the immediate and 2 years postoperative correctionAbstract 145. Does prolonged symptom duration influence surgical outcomes for cervical radiculopathy?Abstract 147. A data-driven cluster analysis approach to create homogenous subgroups for traumatic spine injury: toward improving traditional classificationAbstract 41. The use of neo-adjuvant denosumab in treatment of giant cell tumours of the spineAbstract 5. Complications, revision rates and accuracy of robotic-guided S2 alar-iliac screw placementAbstract 6. Opioid use after spine surgery: How much are we over-prescribing?Abstract 7. Intradiscal injection of autologous bone marrow aspirate concentrate improves low back pain at 1 yearAbstract 8. Augmented reality–assisted spine surgery: an early experience demonstrating safety and accuracy with 218 screwsAbstract 22. Comparison of complications, revision rates and fluoroscopy time using the latest technology in robotic-guided surgery with historical fluoroscopic-guided controlsAbstract 23. Robotic-guided thoracolumbar fusion experience: a multi-surgeon, single-centre study of 628 patients and 3874 robotic-guided screws from 2012 to 2020Abstract 86. A province-wide assessment of the appropriateness of lumbar spine MRIAbstract 134. Concomitant traumatic spinal cord injury and brain injury diagnoses are more frequent and impactful than expectedAbstract 45. Spatial and depth mapping of nascent mineralization on Ti6Al4V surfaces demonstrating hierarchical macro-micro-nanoscale surface featuresAbstract 111. Propensity-matched outcomes comparing lumbar interbody fusion and total disk arthroplasty: a Canadian Spine Outcomes and Research Network (CSORN) studyAbstract 30. A Canadian-based pilot study of current surgical practice and implant preferences in lumbar fusion surgeryAbstract 32. Local contamination is a major cause of early deep wound infections following open posterior lumbosacral fusionsAbstract 99. Comparing patient preoperative expectations and postoperative expectation fulfillment between minimally invasive versus open fusion surgeryAbstract 146. Outpatient robotic-assisted lumbar spinal fusion using the Mazor X Stealth EditionAbstract 149. Lessons learned from my first 100 robotic-assisted lumbar fusions using the Mazor X Stealth Edition: surgical synergy with MIS, surgical navigation and roboticsAbstract 151. Freehand biomechanical testing for use in lumbar discectomy trainingAbstract 48. Spinal pathology and outcome post-THA: Does segment of arthrodesis matter?Abstract 27. Patient, surgical and institutional factors associated with length of stay in degenerative lumbar spine surgery: national multicentre cohort analysis from the Canadian Spine Outcomes and Research Network (CSORN)Abstract 28. The impact of the increasing proportion of degenerative spine emergency admissionsAbstract 51. Patient’s expectations of surgery for degenerative spondylolisthesis: analysis by site and type of surgery from the Canadian Spine Outcomes and Research Network (CSORN)Abstract 60. The impact of sex on thoracolumbar surgery outcomes in patients with diabetes — a CSORN studyAbstract 81. The impact of older age on rehabilitation outcomes following functional motor-incomplete traumatic spinal cord injuryAbstract 47. Devise and investigate a novel, intramuscular pressure based, muscle activation strategy in a spine stability modelAbstract 17. 3D radiologic outcomes for patients

Sidhu, Karamjot ; Kim, Dorothy ; Lebel, David ; [et al.]

CMA Impact Inc. ; 2022

In: Canadian Journal of Surgery Vol. 65, No. 6 Suppl 3 ( 2022-12-09), p. S112-S164

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In: Canadian Journal of Surgery, CMA Impact Inc., Vol. 65, No. 6 Suppl 3 ( 2022-12-09), p. S112-S164

Type of Medium: Online Resource

ISSN: 0008-428X , 1488-2310

URL: Article

DOI: 10.1503/cjs.011622

Language: English

Publisher: CMA Impact Inc.

Publication Date: 2022

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Canadian Spine Society01.1.1: Surgery versus standardized nonoperative care for the treatment of lumbar disc herniations: a Canadian trial02.1.1: Wait times for elective spine surgery across Canada: data from the Canadian Spine Outcomes and Research Network03.1.1: Presurgical physician utilization in elective thoracolumbar spine surgery candidates: a nationwide analysis from the CSORN database04.1.2: Activities performed and treatments conducted prior to consultation with a spine surgeon: Are patients and clinicians following evidence-based clinical practice guidelines?05.1.2: Patient-reported disability versus objective physical performance measures in assessing patient recovery06.1.2: Risk factors for work status in low back pain patients: a cross-sectional analysis of patients presenting to the Ontario Inter-professional Spine Assessment and Education Clinics07.1.3: Comparison of symptomatic, functional and demographic characteristics of postsurgical versus nonoperative LBP patients08.1.3: Are primary care patients with different patterns of low back pain epidemiologically distinct?09.1.3: Lack of prognostic model validation in low back pain prediction studies10.1.4: Larger scoliosis curve magnitude is associated with increased surgical and perioperative complications: a multi-centre analysis of 1173 adolescent idiopathic scoliosis curves11.1.4: Superior extension of upper instrumented level in distraction-based surgery: a surrogate for clinically significant PJK12.1.4: The optimal surgical approach for Lenke 5 curves: Is the anterior approach ready for a comeback?13.1.5: Improving quality and safety in pediatric spine surgery: the team approach14.1.5: Posterior vertebral column resection in pediatric deformity: the advantages of staging15.1.5: Minimally invasive surgery in adolescent idiopathic scoliosis: lessons learned at mean 2-year follow-up16.2.1: Development of a Canadian competency-based spine surgery fellowship education curriculum17.2.1: Computer-assisted surgery is an effective educational tool for the training of orthopedic surgery residents in pedicle screw placement18.2.1: Validation of the Calgary Spine Severity Score19.2.2: Can triaging referrals with a simple 3-item pain questionnaire reduce wait times for consultations for patients who would benefit from lumbar spinal surgery?20.2.2: Strategies to improve the credibility of meta-analyses in spine surgery: a systematic survey21.2.2: The societal cost of waiting to see a spine surgeon for lower back symptoms in Canada22.2.3: The cost of an adverse event depends on its definition and method of capture23.2.3: Economic evaluation of intraoperative cone beam CT-based navigation for the placement of spinal pedicle screws: a patient-level cost-effectiveness analysis24.2.3: Predictors of inappropriate emergency department utilization following elective thoracolumbar spine surgery25.2.4: Incidence, impact and risk factors of adverse events in thoracic and lumbar spine fractures. An ambispective cohort analysis of 390 patients26.2.4: Factors associated with adverse events in major elective spine, knee, and hip in-patient orthopedic surgery27.2.4: Prognostic factors for survival in surgical series of symptomatic metastatic epidural spinal cord compression: a prospective North American multicentre study in 142 patients28.2.5: A comparison of 2 prospective adverse event recording tools with institutional ICD-10 coding for detecting perioperative adverse events in patients undergoing spinal surgery29.2.5: Assessment of impact of long-cassette standing radiographs on surgical planning for lumbar pathology: an international survey of spine surgeons30.2.5: Long-term patient-reported outcome and surgical survivorship of MIS fusion for low-grade spondylolisthesis31.3.1: The effect of prolonged postoperative antibiotic administration on the rate of infection in patients undergoing posterior spine surgery requiring a Hemovac drain32.3.1: Preliminary results of a Phase 1 trial on the use of photodynamic therapy in vertebral metastases33.3.1: The minimal clinically important difference of the modified Japanese Orthopaedic Association score in patients with degenerative cervical myelopathy undergoing surgical intervention34.3.1: Patient and surgeon radiation exposure during spinal instrumentation using intraoperative CT-based navigation35.3.2: Are postoperative pelvic parameters and sagittal balance predictive of further lumbar surgery in patients with spinal stenosis?36.3.2: Postoperative ambulation in patients undergoing total hip arthroplasty, total knee arthroplasty and elective lumbar spine surgery to treat arthritic pathologies37.3.2 Pain on the brain: Is the SF-36 mental component summary enough?38.3.2: Accurate and safe cervical osteotomy for kyphotic deformity in ankylosing spondylitis39.3.3: Adjacent segment pathology in the lumbar spine: progressive disease or a consequence of iatrogenic fusion?40.3.3: The association of cervical spine alignment with neurological recovery in a prospective cohort of surgical myelopathy patients: analysis of a series of 124 cases41.3.3: Use of neuropathic pain questionnaires in predicting the development of failed back surgery syndrome following lumbar discectomy for radiculopathy42.3.3: Quality of life and neurological outcomes after surgical decompression in patients with cervical ossification of the posterior longitudinal ligament: prospective, multicentre AOSpine International study of 479 patients43.3.4: Minimally invasive decompression in focal lumbar spinal stenosis with or without stable spondylolisthesis — comparative outcomes and reoperation rates at a minimum of 2 years44.3.4: Impact of nonoperative care utilization on postthoracolumbar spine surgery outcomes: a national perspective using the CSORN registry45.3.4: Presurgical imaging, testing and injection utilization in elective thoracolumbar spine surgery candidates: a nationwide analysis from the CSORN database46.3.5: A clinical prediction rule for clinical outcomes in patients undergoing surgery for degenerative cervical myelopathy: analysis of an international AOSpine prospective multi-centre dataset of 743 patients47.3.5: A comparison of health-related quality of life outcomes in spinal cord injury patients residing in rural and urban areas48.3.5: Minimally invasive versus open discectomy: a systematic review and meta-analysis49.1.1: Validity of transcranial motor evoked potentials as early indicators of neural compromise in rat model of spinal cord compression50.1.2: Validation of true spine length radiographic measurements51.1.3: Closure of the intervertebral disc annulus fibrosus using a novel suture application device — in vivo porcine and ex vivo biomechanical evaluation52.1.4: Vertebroplasty versus kyphoplasty in osteoporotic vertebral compression fracture model: What is safer?53.1.5: Brain-derived neurotrophic factor promotes intraneural macrophage migration and allodynia in experimental disc-herniation neuropathy54.1.6: Development and evaluation of an open-source 3D virtual simulator with integrated motion-tracking as a teaching tool for pedicle screw insertion55.2.7: Preoperative “amber flag” psychological measure scores and patient expectations: a nationwide analysis from the CSORN database56.2.8: Assessment of frailty in elderly spinal surgery patients57.2.9: Predicting adverse events and their impact on hospital length of stay in a prospective Spine AdVerse Events Severity (SAVES) database58.2.10: Clinical and surgical predictors of perioperative complications in patients with degenerative cervical myelopathy: results from the multicentre, prospective AOSpine International study on 479 patients59.2.11: Longitudinal analysis of the incidence of adverse events in tertiary spine referral centres: a national perspective from the Canadian Spine Outcomes and Research Network (CSORN) registry60.2.12: The use of validated clinical outcome measures in spinal surgery: an analysis of recent

Bailey, Chris ; Stratton, Alexandra ; Manson, Neil ; [et al.]

CMA Impact Inc. ; 2015

In: Canadian Journal of Surgery Vol. 58, No. 3 Suppl 1 ( 2015-06), p. S43-S70

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In: Canadian Journal of Surgery, CMA Impact Inc., Vol. 58, No. 3 Suppl 1 ( 2015-06), p. S43-S70

Type of Medium: Online Resource

ISSN: 0008-428X , 1488-2310

URL: Article

DOI: 10.1503/cjs.005515

Language: English

Publisher: CMA Impact Inc.

Publication Date: 2015

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Aleem, Ilyas ; Xu, Yan ; Rampersaud, Y. Raja ; [et al.]

CMA Impact Inc. ; 2016

In: Canadian Journal of Surgery Vol. 59, No. 3 Suppl 2 ( 2016-06), p. S39-S63

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In: Canadian Journal of Surgery, CMA Impact Inc., Vol. 59, No. 3 Suppl 2 ( 2016-06), p. S39-S63

Type of Medium: Online Resource

ISSN: 0008-428X , 1488-2310

URL: Article

DOI: 10.1503/cjs.006916

Language: English

Publisher: CMA Impact Inc.

Publication Date: 2016

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615: Pathological Gleason 7 in 1323 Men Receiving Radical Prostatectomy: The Necessity to Separate the Gleason Patters 3+4 and 4+3?

Turley, Ryan S. ; Sun, Leon ; Rampersaud, Edward N. ; [et al.]

Ovid Technologies (Wolters Kluwer Health) ; 2007

In: Journal of Urology Vol. 177, No. 4S ( 2007-04), p. 206-206

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In: Journal of Urology, Ovid Technologies (Wolters Kluwer Health), Vol. 177, No. 4S ( 2007-04), p. 206-206

Type of Medium: Online Resource

ISSN: 0022-5347 , 1527-3792

URL: Article

DOI: 10.1016/S0022-5347(18)30855-3

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XA 10000

Language: English

Publisher: Ovid Technologies (Wolters Kluwer Health)

Publication Date: 2007

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Vaccination of Mice with a Yop Translocon Complex Elicits Antibodies That Are Protective against Infection with F1 − Yersinia pestis

Ivanov, Maya I. ; Noel, Betty L. ; Rampersaud, Ryan ; [et al.]

American Society for Microbiology ; 2008

In: Infection and Immunity Vol. 76, No. 11 ( 2008-11), p. 5181-5190

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In: Infection and Immunity, American Society for Microbiology, Vol. 76, No. 11 ( 2008-11), p. 5181-5190

Abstract: Yersinia pestis , the bacterial agent of plague, secretes several proteins important for pathogenesis or host protection. The F1 protein forms a capsule on the bacterial cell surface and is a well-characterized protective antigen but is not essential for virulence. A type III secretion system that is essential for virulence exports Yop proteins, which function as antiphagocytic or anti-inflammatory factors. Yop effectors (e.g., YopE) are delivered across the host cell plasma membrane by a translocon, composed of YopB and YopD. Complexes of YopB, YopD, and YopE (BDE) secreted by Yersinia pseudotuberculosis were purified by affinity chromatography and used as immunogens to determine if antibodies to the translocon could provide protection against Y. pestis in mice. Mice vaccinated with BDE generated high-titer immunoglobulin G antibodies specific for BDE, as shown by enzyme-linked immunosorbent assay and immunoblotting, and were protected against lethal intravenous challenge with F1 − but not F1 + Y. pestis. Mice passively immunized with anti-BDE serum were protected from lethal challenge with F1 − Y. pestis . The YopB protein or a complex of YopB and YopD (BD) was purified and determined by vaccination to be immunogenic in mice. Mice actively vaccinated with BD or passively vaccinated with anti-BD serum were protected against lethal challenge with F1 − Y. pestis . These results indicate that anti-translocon antibodies can be used as immunotherapy to treat infections by F1 − Y. pestis .

Type of Medium: Online Resource

ISSN: 0019-9567 , 1098-5522

URL: Article

DOI: 10.1128/IAI.00189-08

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Language: English

Publisher: American Society for Microbiology

Publication Date: 2008

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Inerolysin, a Cholesterol-Dependent Cytolysin Produced by Lactobacillus iners

Rampersaud, Ryan ; Planet, Paul J. ; Randis, Tara M. ; [et al.]

American Society for Microbiology ; 2011

In: Journal of Bacteriology Vol. 193, No. 5 ( 2011-03), p. 1034-1041

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In: Journal of Bacteriology, American Society for Microbiology, Vol. 193, No. 5 ( 2011-03), p. 1034-1041

Abstract: Lactobacillus iners is a common constituent of the human vaginal microbiota. This species was only recently characterized due to its fastidious growth requirements and has been hypothesized to play a role in the pathogenesis of bacterial vaginosis. Here we present the identification and molecular characterization of a protein toxin produced by L . iners . The L . iners genome encodes an open reading frame with significant primary sequence similarity to intermedilysin (ILY; 69.2% similarity) and vaginolysin (VLY; 68.4% similarity), the cholesterol-dependent cytolysins from Streptococcus intermedius and Gardnerella vaginalis , respectively. Clinical isolates of L . iners produce this protein, inerolysin (INY), during growth in vitro , as assessed by Western analysis. INY is a pore-forming toxin that is activated by reducing agents and inhibited by excess cholesterol. It is active across a pH range of 4.5 to 6.0 but is inactive at pH 7.4. At sublytic concentrations, INY activates p38 mitogen-activated protein kinase and allows entry of fluorescent phalloidin into the cytoplasm of epithelial cells. Unlike VLY and ILY, which are human specific, INY is active against cells from a broad range of species. INY represents a new target for studies directed at understanding the role of L . iners in states of health and disease at the vaginal mucosal surface.

Type of Medium: Online Resource

ISSN: 0021-9193 , 1098-5530

URL: Article

DOI: 10.1128/JB.00694-10

Language: English

Publisher: American Society for Microbiology

Publication Date: 2011

detail.hit.zdb_id: 1481988-0

SSG: 12

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Cigarette Smoke Inhibits Airway Epithelial Cell Innate Immune Responses to Bacteria

Kulkarni, Ritwij ; Rampersaud, Ryan ; Aguilar, Jorge L. ; [et al.]

American Society for Microbiology ; 2010

In: Infection and Immunity Vol. 78, No. 5 ( 2010-05), p. 2146-2152

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In: Infection and Immunity, American Society for Microbiology, Vol. 78, No. 5 ( 2010-05), p. 2146-2152

Abstract: The human upper respiratory tract, including the nasopharynx, is colonized by a diverse array of microorganisms. While the host generally exists in harmony with the commensal microflora, under certain conditions, these organisms may cause local or systemic disease. Respiratory epithelial cells act as local sentinels of the innate immune system, responding to conserved microbial patterns through activation of signal transduction pathways and cytokine production. In addition to colonizing microbes, these cells may also be influenced by environmental agents, including cigarette smoke (CS). Because of the strong relationship among secondhand smoke exposure, bacterial infection, and sinusitis, we hypothesized that components in CS might alter epithelial cell innate immune responses to pathogenic bacteria. We examined the effect of CS condensate (CSC) or extract (CSE) on signal transduction and cytokine production in primary and immortalized epithelial cells of human or murine origin in response to nontypeable Haemophilus influenzae and Staphylococcus aureus . We observed that epithelial production of interleukin-8 (IL-8) and IL-6 in response to bacterial stimulation was significantly inhibited in the presence of CS ( P 〈 0.001 for inhibition by either CSC or CSE). In contrast, epithelial production of beta interferon (IFN-β) was not inhibited. CSC decreased NF-κB activation ( P 〈 0.05) and altered the kinetics of mitogen-activated protein kinase phosphorylation in cells exposed to bacteria. Treatment of CSC with antioxidants abrogated CSC-mediated reduction of epithelial IL-8 responses to bacteria ( P 〉 0.05 compared to cells without CSC treatment). These results identify a novel oxidant-mediated immunosuppressive role for CS in epithelial cells.

Type of Medium: Online Resource

ISSN: 0019-9567 , 1098-5522

URL: Article

DOI: 10.1128/IAI.01410-09

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XA 10000

Language: English

Publisher: American Society for Microbiology

Publication Date: 2010

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Genome Sequence of the Human Abscess Isolate Streptococcus intermedius BA1

Planet, Paul J. ; Rampersaud, Ryan ; Hymes, Saul R. ; [et al.]

American Society for Microbiology ; 2013

In: Genome Announcements Vol. 1, No. 1 ( 2013-02-28)

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In: Genome Announcements, American Society for Microbiology, Vol. 1, No. 1 ( 2013-02-28)

Abstract: Streptococcus intermedius is a human pathogen with a propensity for abscess formation. We report a high-quality draft genome sequence of S. intermedius strain BA1, an isolate from a human epidural abscess. This sequence provides insight into the biology of S. intermedius and will aid investigations of pathogenicity.

Type of Medium: Online Resource

ISSN: 2169-8287

URL: Article

DOI: 10.1128/genomeA.00117-12

Language: English

Publisher: American Society for Microbiology

Publication Date: 2013

detail.hit.zdb_id: 2968655-6

detail.hit.zdb_id: 2704277-7

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Kooperativer Bibliotheksverbund

Berlin Brandenburg