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Kroshus E, Chrisman SPD, Hunt T, Hays R, Garrett K, Peterson A, Rivara FP, Chiampas G, Ramshaw D, Glang A. Stakeholder-Engaged Development of a Theory-Driven, Feasible, and Acceptable Approach to Concussion Education. Health Educ Behav 2024; 51:197-203. [PMID: 35703397 PMCID: PMC9751226 DOI: 10.1177/10901981221099886] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Concussion education is widely mandated and largely ineffective. Recent consensus guidance on concussion education asserts the importance of (1) theory-driven programming that targets the team as a system and (2) working with end users throughout the development process, and considering issues such as feasibility, acceptability, and sustainability. Consistent with this guidance, and in collaboration with youth sport stakeholders in two regions of the United States, we developed a novel approach to concussion education: Pre-game safety huddles. Safety huddles have the following two core components: (1) athletes, coaches, and other stakeholders come together before the start of each game and (2) opinion leaders (coaches, referees) affirm the importance of care seeking for suspected concussion. The aim of this article is to provide an overview of the collaborative process through which we refined the safety huddle concept into an acceptable and feasible intervention with potential for sustainable implementation in diverse youth sports settings with minimal resource demands. In describing our process and discussing challenges and opportunities, we hope to provide an example for others seeking to develop and implement injury prevention interventions in youth sports settings.
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Affiliation(s)
| | | | - Tamerah Hunt
- Georgia Southern University, Statesboro, GA, USA
| | | | | | - Alexis Peterson
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | | | | | - Ann Glang
- University of Oregon, Eugene, OR, USA
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Roby PR, Mozel AE, Arbogast KB, Buckley T, Caccese JB, Chrisman SPD, Clugston JR, Eckner JT, Esopenko C, Hunt T, Kelly LA, McDevitt J, Perkins SM, Putukian M, Susmarski A, Broglio SP, Pasquina PF, McAllister TW, McCrea M, Master CL. Postinjury Outcomes After Non-Sport-Related Concussion: A CARE Consortium Study. J Athl Train 2024; 59:289-296. [PMID: 37681681 PMCID: PMC10976341 DOI: 10.4085/1062-6050-0181.23] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
CONTEXT Concussion research has primarily focused on sport-related mechanisms and excluded non-sport-related mechanisms. In adult populations, non-sport-related concussions (non-SRCs) demonstrated worse clinical outcomes compared with sport-related concussions (SRCs); however, investigations of non-SRCs in college-aged patients are limited. OBJECTIVES To examine clinical outcomes in collegiate athletes with non-SRCs compared with SRCs and explore sex differences in outcomes among collegiate athletes with non-SRCs. DESIGN Prospective cohort study. SETTING Clinical setting. PATIENTS OR OTHER PARTICIPANTS A total of 3500 athletes were included (n = 555 with non-SRCs, 42.5% female) from colleges or universities and service academies participating in the National Collegiate Athletic Association Department of Defense Concussion Assessment, Research and Education (CARE) Consortium. MAIN OUTCOME MEASURE(S) Dichotomous outcomes (yes or no) consisted of immediate reporting, mental status alterations, loss of consciousness, posttraumatic amnesia, retrograde amnesia, motor impairments, delayed symptom presentation, and required hospital transport. Continuous outcomes were symptom severity, days with concussion symptoms, and days lost to injury. Data were collected within 24 to 48 hours of injury and at return to play. Adjusted relative risks (ARRs) compared the likelihood of dichotomous outcomes by mechanism and by sex within patients with non-SRCs. Multivariate negative binomial regressions were used to assess group differences in continuous variables. RESULTS Athletes with non-SRCs were less likely to report immediately (ARR = 0.73, 95% CI = 0.65, 0.81) and more likely to report delayed symptom presentation (ARR = 1.17, 95% CI = 1.03, 1.32), loss of consciousness (ARR = 3.15, 95% CI = 2.32, 4.28), retrograde amnesia (ARR = 1.77, 95% CI = 1.22, 2.57), and motor impairment (ARR = 1.45, 95% CI = 1.14, 1.84). Athletes with non-SRCs described greater symptom severity, more symptomatic days, and more days lost to injury (P < .001) compared with those who had SRCs. Within the non-SRC group, female athletes indicated greater symptom severity, more symptomatic days, and more days lost to injury (P < .03) than male athletes. CONCLUSIONS Athletes with non-SRCs had worse postinjury outcomes compared with those who had SRCs, and female athletes with non-SRCs had worse recovery metrics than male athletes. Our findings suggest that further investigation of individuals with non-SRCs is needed to improve concussion reporting and management.
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Affiliation(s)
- Patricia R. Roby
- Center for Injury Research and Prevention, University of Pennsylvania, Philadelphia
| | - Anne E. Mozel
- Center for Injury Research and Prevention, University of Pennsylvania, Philadelphia
| | - Kristy B. Arbogast
- Center for Injury Research and Prevention, University of Pennsylvania, Philadelphia
- Division of Emergency Medicine, University of Pennsylvania, Philadelphia
- Perelman School of Medicine, University of Pennsylvania, Philadelphia
| | - Thomas Buckley
- Department of Kinesiology and Applied Physiology, University of Delaware, Newark
| | - Jaclyn B. Caccese
- School of Health & Rehabilitation Sciences, Ohio State University College of Medicine, Columbus
| | - Sara P. D. Chrisman
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, WA
- Division of Adolescent Medicine, Department of Pediatrics, University of Washington, Seattle
| | - James R. Clugston
- Departments of Community Health & Family Medicine and Neurology, University of Florida, Gainesville
| | - James T. Eckner
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor
| | - Carrie Esopenko
- Department of Rehabilitation and Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Tamerah Hunt
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro
| | - Louise A. Kelly
- Department of Exercise Science, California Lutheran University, Thousand Oaks
| | - Jane McDevitt
- Department of Health and Rehabilitation Science, Temple University, Philadelphia, PA
| | - Susan M. Perkins
- Department of Biostatistics and Health Data Science, Indiana University, Bloomington
| | - Margot Putukian
- Major League Soccer, Formerly Princeton University, University Health Service, Princeton, NJ
| | | | | | - Paul F. Pasquina
- Physical Medicine & Rehabilitation, Uniformed Services University, Bethesda, MD
| | | | - Michael McCrea
- Departments of Neurosurgery, Medical College of Wisconsin, Milwaukee
- Departments of Neurology, Medical College of Wisconsin, Milwaukee
| | - Christina L. Master
- Center for Injury Research and Prevention, University of Pennsylvania, Philadelphia
- Sports Medicine Performance Center, Children’s Hospital of Philadelphia, PA
- Perelman School of Medicine, University of Pennsylvania, Philadelphia
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Roberts K, Kuhlman K, Byrd M, Hunt T. The Influence of Athletic Identity on Mental Health Symptoms During Retirement From Sport. J Sport Rehabil 2023; 32:630-634. [PMID: 37156547 DOI: 10.1123/jsr.2022-0362] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 03/06/2023] [Accepted: 03/14/2023] [Indexed: 05/10/2023]
Abstract
CLINICAL SCENARIO Athletic identity (AI) can be defined as, "the degree to which an individual identifies with an athlete role, and the values, and social networks associated with that identity," and can pose a problem when athletes do not explore themselves outside of sport. This lack of identity development beyond athletics has the potential to lead to the development of a high AI. High AI in athletes can have positive effects in areas such as performance, however, high AI may also pose negative consequences. The development of such an identity can limit the adaptive responses to substantial life changes such as retirement from sport. This inability to adapt may thereby contribute to mental health problems during the transition. Therefore, the purpose of this study is to better understand the relationship between athletic identity and mental health symptoms so clinicians may provide support to enable positive outcomes after retirement from sport. CLINICAL QUESTION What is the influence of athletic identity on mental health symptoms in athletes retiring from sports? SUMMARY OF KEY FINDINGS (1) High athletic identity contributes to increased mental health symptoms following retirement. (2) Athletic identity had no relationship to mental health symptoms during the preretirement phase of an athlete's career Clinical Bottom Line: The findings suggest that there is high-quality evidence to support that AI has no relationship with mental health symptoms during the preretirement phase and that athletes with high AI are more likely to experience mental health symptoms during their transition out of or retirement from sport. STRENGTH OF RECOMMENDATION The grade of B is recommended by the Strength of Recommendation taxonomy for consistent, limited-quality, patient-oriented evidence that high AI has a strong relationship to mental health symptoms following retirement in athletes.
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Affiliation(s)
| | | | - Megan Byrd
- Georgia Southern University, Statesboro, GA,USA
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Kroshus E, Chrisman SPD, Glang A, Hunt T, Hays R, Lowry S, Peterson A, Garrett K, Ramshaw D, Hafferty K, Kinney E, Manzueta M, Steiner MK, Bollinger BJ, Chiampas G, Rivara FP. Concussion education for youth athletes using Pre-Game Safety Huddles: a cluster-randomised controlled trial. Inj Prev 2023; 29:22-28. [PMID: 36113984 PMCID: PMC9877103 DOI: 10.1136/ip-2022-044665] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/21/2022] [Indexed: 01/29/2023]
Abstract
OBJECTIVES Determine whether Pre-Game Safety Huddles, a novel and low-resource approach to concussion education, increase the expected likelihood of concussion reporting for youth athletes. METHODS A cluster-randomised trial compared Safety Huddles to usual care. Safety Huddles bring together athletes and coaches from both teams before the start of each game for coaches to briefly affirm the importance of speaking up if a concussion is suspected. Participants were athletes from 22 competitive community-based American football and girls and boys soccer teams (ages 9-14), and randomisation into intervention or control occurred at the level of the bracket (group of teams that compete against each other during the regular season). The primary outcome was expected likelihood of reporting concussion symptoms to the coach, measured via validated athlete survey at the beginning and end of the season. RESULTS Of 343 eligible participants, 339 (99%) completed baseline surveys and 303 (88%) completed surveys at season end. The mean (SD) age was 11.4 (1.1) years, 26% were female soccer athletes, 27% were male soccer athletes and 47% were football athletes. In adjusted analyses accounting for baseline values and clustering by sport and team via random effects, expected likelihood of concussion reporting at the end of the season was significantly higher in the intervention group compared to controls (mean difference=0.49, 95% CI 0.11 to 0.88; Cohen's d=0.35). CONCLUSIONS AND RELEVANCE Pre-Game Safety Huddles increased the expected likelihood of athletes reporting concussion symptoms. While further study is warranted, sport organisations should consider this approach a promising low-resource option for improving concussion safety in their setting. TRIAL REGISTRATION NUMBER NCT04099329.
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Affiliation(s)
- Emily Kroshus
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA .,Center for Child Health, Behavior and Development, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Sara P D Chrisman
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA,Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Ann Glang
- Center of Brain Injury, Research and Training, University of Oregon, Eugene, Oregon, USA
| | - Tamerah Hunt
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro, Georgia, USA
| | - Rachel Hays
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Sarah Lowry
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Alexis Peterson
- National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kimberly Garrett
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Dane Ramshaw
- Center of Brain Injury, Research and Training, University of Oregon, Eugene, Oregon, USA
| | - Kiana Hafferty
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Erin Kinney
- Oregon Health & Science University School of Medicine, Portland, Oregon, USA
| | - Maria Manzueta
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Mary Kathleen Steiner
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | - Beth J Bollinger
- Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
| | | | - Frederick P Rivara
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, USA,Center for Child Health, Behavior and Development, Seattle Children’s Research Institute, Seattle, Washington, USA
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5
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Kroshus E, Lowry SJ, Garrett K, Hays R, Hunt T, Chrisman SPD. Development of a scale to measure expected concussion reporting behavior. Inj Epidemiol 2021; 8:70. [PMID: 34920752 PMCID: PMC8684105 DOI: 10.1186/s40621-021-00364-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/08/2021] [Indexed: 12/04/2022] Open
Abstract
Background Most concussion education aims to increase athlete self-report of concussive symptoms. Although the population burden of concussion is high, frequency with which this injury occurs on a given sports team in a given season is relatively low. This means that powering concussion education evaluation studies to measure change in post-injury symptom reporting behavior requires what is often a prohibitively large sample size. Thus, evaluation studies are typically powered to measure proximal cognitions. Expected reporting behavior, a cognition that reflects planned and reactive decision-making, is a theoretically indicated construct for inclusion in evaluation studies. However, previously no scales were available to measure this construct with demonstrated reliability and validity among youth athletes. The objective of this study was to develop and assess the validity of a brief single-factor scale to measure expected youth athlete concussion reporting behavior (CR-E) in a sample of youth athletes.
Methods A mixed methods approach was used, including cognitive interviews with youth athletes, and quantitative item reduction and validation. Participants were youth athletes (aged 9–16) from the Seattle metropolitan and rural south-Georgia regions. After refining an initial pool of items using cognitive interviews with a diverse group of youth athletes (n = 20), a survey containing these items was administered to youth soccer and football players (n = 291). Item reduction statistics and sequential confirmatory factor analyses were used to reduce the initial scale using a randomly selected half of the sample. Then, a final confirmatory factor analysis and validation tests were applied to the other half of the sample of youth athletes. Predictive validation was conducted longitudinally in a separate sample of youth athletes (n = 155). Results Internal consistency was high (alpha = 0.89), model fit was excellent, validation tests were in the hypothesized directions, and the scale was feasible to use. Using the finalized 4-item scale, we observed that less than one-third of youth soccer and football athletes expect to “always” tell their coach about symptoms of a suspected concussion. Conclusions The CR-E measure should be included in future studies evaluating concussion education programming in youth athlete populations. Supplementary Information The online version contains supplementary material available at 10.1186/s40621-021-00364-4.
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Affiliation(s)
- Emily Kroshus
- Center for Child Health, Behavior and Development, Seattle Children's Research Institute, 1920 Terry Ave, Seattle, WA, 98101, USA. .,Department of Pediatrics, University of Washington, 6200 NE 74th St, Ste 110, Seattle, WA, 98115, USA.
| | - Sarah J Lowry
- Center for Child Health, Behavior and Development, Seattle Children's Research Institute, 1920 Terry Ave, Seattle, WA, 98101, USA
| | - Kimberly Garrett
- Center for Child Health, Behavior and Development, Seattle Children's Research Institute, 1920 Terry Ave, Seattle, WA, 98101, USA
| | | | - Tamerah Hunt
- Department of Health Sciences and Kinesiology, Georgia Southern University, Statesboro, GA, P.O. Box 8076, 30460, USA
| | - Sara P D Chrisman
- Center for Child Health, Behavior and Development, Seattle Children's Research Institute, 1920 Terry Ave, Seattle, WA, 98101, USA.,Department of Pediatrics, University of Washington, 6200 NE 74th St, Ste 110, Seattle, WA, 98115, USA
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Chivulescu M, Krohg-Sorensen K, Scheirlynk E, Lindberg B, Dejgaard L, Lie O, Helle-Valle T, Skjolsvik E, Aabel E, Hunt T, Estensen M, Edvardsen T, Lingaas P, Haugaa K. Mitral annulus disjunction is highly prevalent in patients with Marfan syndrome and Loyes-Dietz syndrome. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Mitral valve prolapse is a common finding in patients with Marfan and Loyes-Dietz syndrome. Mitral annulus disjunction (MAD), an atrial displacement of the hinge point of the mitral valve, has previously been associated with non-syndromic MVP and life-threatening ventricular arrhythmias.
Purpose
We aimed to assess the prevalence of MAD in patients with Marfan and Loyes-Dietz syndrome and relate the presence of MAD to mitral valve prolapse.
Methods
We included genotype positive patients with Marfan and Loyes-Dietz syndrome, and patients with Marfan syndrome fulfilling Revised Ghent Criteria. Mitral valve prolapse was defined as superior mitral leaflets' displacement ≥2mm beyond the mitral annulus. MAD was diagnosed by echocardiography and quantified as the distance from the ventricular myocardium to the hinge point of the posterior mitral leaflet (Figure, left panel).
Results
We included 111 patients with Marfan syndrome and 66 patients with Loyes-Dietz syndrome (age 26 [IQR, 13–39] years, 53% male). Mitral valve prolapse was observed in 54 (31%) and MAD in 74 (42%) patients. Longitudinal MAD distance was 8 (IQR, 6–10) mm. Forty-six (85%) patients with mitral valve prolapse had concomitant MAD, p<0.001 (Figure, right panel).
Conclusion
Mitral valve prolapse was observed in one third of patients with Marfan and Loyes-Dietz syndrome. MAD was highly prevalent and found in 42% of all patients and in 85% of those with mitral valve prolapse. Presence of mitral valve prolapse in Marfan and Loyes-Dietz syndrome should raise awareness of MAD which may be of importance in follow-up and monitoring of these patients.
Funding Acknowledgement
Type of funding source: Public Institution(s). Main funding source(s): Health Authority of South Eastern Norway
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Affiliation(s)
- M Chivulescu
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | | | - E Scheirlynk
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - B Lindberg
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - L Dejgaard
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - O Lie
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - T Helle-Valle
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - E Skjolsvik
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - E Aabel
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - T Hunt
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - M Estensen
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - T Edvardsen
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - P Lingaas
- Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - K Haugaa
- Oslo University Hospital Rikshospitalet, Oslo, Norway
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Hannah MD, Gipson C, Walden N, Walsh S, Hunt T. The Effect Of Crossfit On Self-talk And Goal Setting In At-risk Youth: A Pilot Study. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000562694.00744.26] [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: 11/21/2022]
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8
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Tomczyk CP, Langdon J, Shaver G, Hunt T. The Effect of Anxiety on Baseline Concussion Assessment in Adolescent Females. Med Sci Sports Exerc 2018. [DOI: 10.1249/01.mss.0000535441.46637.1a] [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: 11/21/2022]
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Hunt T, Langdon J. THE EFFECTS OF COGNITIVE MATURITY ON CONCUSSION ASSESSMENT IN LOW SOCIOECONOMIC URBAN HIGH SCHOOL ATHLETES. Br J Sports Med 2017. [DOI: 10.1136/bjsports-2016-097372.127] [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: 11/04/2022]
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10
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Pantin JM, Hoyt RF, Aras O, Sato N, Chen MY, Hunt T, Clevenger R, Eclarinal P, Adler S, Choyke P, Childs RW. Optimization of intrabone delivery of hematopoietic progenitor cells in a swine model using cell radiolabeling with [89]zirconium. Am J Transplant 2015; 15:606-17. [PMID: 25656824 PMCID: PMC8391069 DOI: 10.1111/ajt.13007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/15/2014] [Accepted: 08/28/2014] [Indexed: 01/25/2023]
Abstract
Intrabone (IB) hematopoietic cell transplantation (HCT) of umbilical cord blood in humans remains experimental and the technique has not been optimized. It is unknown whether hematopoietic progenitor cells (HPCs) injected IB are initially retained in the marrow or rapidly enter into the venous circulation before homing to the marrow. To develop an IB-injection technique that maximizes HPC marrow-retention, we tracked radiolabeled human HPCs following IB-injection into swine. We developed a method to radionuclide-label HPCs using a long-lived positron emitter (89) Zr and protamine sulfate that resulted in cellular-retention of low-dose radioactivity. This approach achieved radioactivity levels sufficient for detection by positron emission tomography with both high sensitivity and spatial resolution when fused with computed tomography. We found that conditions utilized in pilot IB-HCT clinical trials conducted by others led to both rapid drainage into the central venous circulation and cellular extravasation into surrounding muscle and soft tissues. By optimizing the needle design, using continuous real-time intra-marrow pressure monitoring, and by reducing the infusion-volume and infusion-rate, we overcame this limitation and achieved high retention of HPCs in the marrow. This method of IB cellular delivery is readily applicable in the clinic and could be utilized in future investigational IB-HCT trials aimed at maximizing marrow retention of HPCs.
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Affiliation(s)
- J. M. Pantin
- Division of Hematology and Medical Oncology, Georgia Regents University, Augusta, GA
- Hematology Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - R. F. Hoyt
- Laboratory of Animal Medicine and Surgery, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
- Laboratory Animal Sciences Program, Leidos Biomedical Research, Inc., Frederick National Laboratory, Frederick
| | - O. Aras
- Imaging Sciences Training Program, Diagnostic Radiology Department, Warren Magnuson Clinical Center, National Institutes of Health, Bethesda, MD
| | - N. Sato
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - M. Y. Chen
- Advanced Cardiovascular Imaging Laboratory, Cardiovascular and Pulmonary Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - T. Hunt
- Laboratory of Animal Medicine and Surgery, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | - R. Clevenger
- Laboratory of Animal Medicine and Surgery, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
| | | | - S. Adler
- Leidos Biomedical Research, Inc., Reston, VA
| | - P. Choyke
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD
| | - R. W. Childs
- Hematology Branch, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD
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11
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Kirchner M, Mafura M, Hunt T, Card R, Anjum M. Antibiotic resistance gene profiling of faecal and oral anaerobes collected during an antibiotic challenge trial. Anaerobe 2013; 23:20-2. [DOI: 10.1016/j.anaerobe.2013.07.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 07/29/2013] [Accepted: 07/30/2013] [Indexed: 10/26/2022]
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12
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Hunt T, Clarke K, Rupp D. Reconstituted onabotulinumtoxinA retains potency and safety under extended refrigerated storage. Toxicon 2013. [DOI: 10.1016/j.toxicon.2012.07.148] [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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13
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Jackson DJ, Trujillo-Torralbo M, Footitt J, Shamji B, del-Rosario J, Telcian A, Hunt T, Hunt D, Mallia P, Kon OM, Edwards M, Westwick J, Hansel TT, Johnston SL. T5 Sampling Airway Mucosal Lining Fluid Identifies Roles For IL-33 and Multiple Inflammatory Pathways in Virus-Induced Asthma Exacerbations. Thorax 2012. [DOI: 10.1136/thoraxjnl-2012-202678.005] [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: 11/04/2022]
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Aguerre M, Wattiaux M, Hunt T, Lobos N. Effect of nitrogen content and additional straw on changes in chemical composition, volatile losses, and ammonia emissions from dairy manure during long-term storage. J Dairy Sci 2012; 95:3454-66. [DOI: 10.3168/jds.2011-4839] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Accepted: 01/19/2012] [Indexed: 11/19/2022]
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15
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Gasper D, Barr B, Li H, Taus N, Peterson R, Benjamin G, Hunt T, Pesavento PA. Ibex-Associated Malignant Catarrhal Fever–Like Disease in a Group of Bongo Antelope (Tragelaphus eurycerus). Vet Pathol 2011; 49:492-7. [DOI: 10.1177/0300985811429306] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A private zoological facility experienced an outbreak of malignant catarrhal fever (MCF) in 3 bongo antelope ( Tragelaphus eurycerus). All cases were periparturient bongos that presented acutely anorectic beginning ~6 weeks after being housed with a Nubian ibex. Disease quickly progressed to respiratory distress and death within 24–72 hours of onset of clinical signs. Consistent gross findings in affected bongos were pulmonary edema and small pale tan foci in the livers. Histological lesions included a nonsuppurative vasculitis in multiple tissues, which is well recognized in MCF, but additionally included necrotizing cholangiohepatitis and neutrophilic, necrotizing myocarditis. Ibex-associated viral DNA was detected by polymerase chain reaction and was identical in sequence whether derived from bongos or ibex. The sequence closely matched an MCF viral DNA fragment that had been amplified from an ibex and bongo in a previous case report.
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Affiliation(s)
- D. Gasper
- Department of Pathology, Microbiology, Immunology, School of Veterinary Medicine, University of California, Davis, California
| | - B. Barr
- California Animal Health and Food Safety Laboratory, School of Veterinary Medicine, University of California, Davis, California
| | - H. Li
- Animal Disease Research Unit, USDA Agricultural Research Service, Washington State University, Pullman, Washington
| | - N. Taus
- Animal Disease Research Unit, USDA Agricultural Research Service, Washington State University, Pullman, Washington
| | - R. Peterson
- California Department of Food & Agriculture, Animal Health Branch, Eureka, California
| | - G. Benjamin
- Safari West Wildlife Preserve, Santa Rosa, California
| | - T. Hunt
- Safari West Wildlife Preserve, Santa Rosa, California
| | - P. A. Pesavento
- Department of Pathology, Microbiology, Immunology, School of Veterinary Medicine, University of California, Davis, California
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Darwish T, Luks E, Moraes G, Gillon M, Hunt T, Hanley T, James M, Holden P. Deuteration of oleic acid, lipids and other molecules for neutron studies. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311095481] [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: 11/10/2022] Open
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Abstract
One of the most important determinants of physical and mental well-being of people with chronic obstructive pulmonary disease (COPD) is participation in physical activity. The ability to alter the sensation of dyspnoea during exercise may improve both exercise duration and intensity. Despite the low density, inert nature, strong safety profile and multiple applications of helium gas, the potential benefit of helium-oxygen gas mixtures as an adjunct therapy to modify disease symptoms and exercise capabilities in obstructive lung diseases has only recently been explored. This is a systematic review of the available peer-reviewed evidence exploring whether symptom modification (perceived levels of dyspnoea) and exercise performance in COPD (either intensity or duration of work) are modified by inhalation of Heliox. Eight experimental studies met inclusion for this review. A variety of methodologies and outcome variables were used negating meta-analysis and hampering direct comparison between interventions. Overall, there was high level of evidence with a low risk of bias supporting Heliox's effectiveness in improving the intensity and endurance of exercise when compared to room air for people with COPD. Little conclusive evidence was found to determine whether Heliox altered the sensation of dyspnoea during exercise.
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Affiliation(s)
- T Hunt
- Dept of Respiratory Medicine, Repatriation General Hospital, University of South Australia, Adelaide, Australia.
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Searle S, Frankish A, Bignell A, Aken B, Derrien T, Diekhans M, Harte R, Howald C, Kokocinski F, Lin M, Tress M, Van Baren M, Barnes I, Hunt T, Carvalho-Silva D, Davidson C, Donaldson S, Gilbert J, Kay M, Lloyd D, Loveland J, Mudge J, Snow C, Vamathevan J, Wilming L, Brent M, Gerstein M, Guigó R, Kellis M, Reymond A, Zadissa A, Valencia A, Harrow J, Hubbard T. The GENCODE human gene set. Genome Biol 2010. [PMCID: PMC3026266 DOI: 10.1186/gb-2010-11-s1-p36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Inagaki Y, Hunt T, Arana B, Gosho M, Morgan R. Abstract: P493 DRUG-DRUG INTERACTION STUDY TO ASSESS THE EFFECTS OF MULTIPLE DOSE OF PITAVASTATIN (LIVALO®) ON STEADY-STATE WARFARIN IN HEALTHY ADULT VOLUNTEERS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70788-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Fang TC, Otto WR, Rao J, Jeffery R, Hunt T, Alison MR, Cook HT, Wright NA, Poulsom R. Haematopoietic lineage-committed bone marrow cells, but not cloned cultured mesenchymal stem cells, contribute to regeneration of renal tubular epithelium after HgCl 2 -induced acute tubular injury. Cell Prolif 2008; 41:575-91. [PMID: 18616694 DOI: 10.1111/j.1365-2184.2008.00545.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Our previous studies have demonstrated that endogenous bone arrow cells (BMCs) contribute to renal tubular regeneration after acute tubular injury. The aim of this study was to examine which fraction of BMCs, haematopoietic lineage marrow cells (HLMCs) or mesenchymal stem cells (MSCs), are effective. MATERIALS AND METHODS Six-week-old female mice were lethally irradiated and were transplanted with female enhanced green fluorescent protein-positive (GFP(+)), plastic on-adherent marrow cells (as a source of HLMCs) plus cloned cultured male GFP(-) MSCs. Four weeks later, they were assigned into two groups: control mice with vehicle treatment and mice treated with HgCl2. Tritiated thymidine was given 1 h before animal killing which occurred at intervals over 2 weeks. Kidney sections were stained for a tubular epithelial marker, cell origin indicated by GFP immunohistochemistry or Y chromosome in situ hybridization; periodic acid-Schiff staining was performed, and samples were subjected to autoradiography. One thousand consecutive renal tubular epithelial cells per mouse, in S phase, were scored as either female (indigenous) GFP+(HLMC-derived) or male (MSC-derived). RESULTS Haematopoietic lineage marrow cells and MSCs stably engrafted into bone marrow and spleen, but only HLMC-derived cells, not MSCs, were found in the renal tubules and were able to undergo DNA synthesis after acute renal injury. A few MSCs were detected in the renal interstitium, but their importance needs to be further explored. CONCLUSION Haematopoietic lineage marrow cells, but not cloned cultured MSCs, can play a role not only in normal wear-and-tear turnover of renal tubular cells, but also in repair after tubular injury.
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Affiliation(s)
- T-C Fang
- Division of Nephrology, Buddhist Tzu Chi General Hospital, Hualien, Taiwan.
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22
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Fang TC, Otto WR, Jeffery R, Hunt T, Alison MR, Cook HT, Wright NA, Poulsom R. Exogenous bone marrow cells do not rescue non-irradiated mice from acute renal tubular damage caused by HgCl2, despite establishment of chimaerism and cell proliferation in bone marrow and spleen. Cell Prolif 2008; 41:592-606. [PMID: 18699966 DOI: 10.1111/j.1365-2184.2008.00546.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE Various studies have shown that bone marrow stem cells can rescue mice from acute renal tubular damage under a conditioning advantage (irradiation or cisplatin treatment) favouring donor cell engraftment and regeneration; however, it is not known whether bone marrow cells (BMCs) can contribute to repair of acute tubular damage in the absence of a selection pressure for the donor cells. The aim of this study was to examine this possibility. MATERIALS AND METHODS Ten-week-old female mice were assigned into control non-irradiated animals having only vehicle treatment, HgCl(2)-treated non-irradiated mice, HgCl(2)-treated non-irradiated mice infused with male BMCs 1 day after HgCl(2), and vehicle-treated mice with male BMCs. Tritiated thymidine was given 1 h before animal killing. RESULTS Donor BMCs could not alleviate non-irradiated mice from acute tubular damage caused by HgCl(2), deduced by no reduction in serum urea nitrogen combined with negligible cell engraftment. However, donor BMCs could home to the bone marrow and spleen and display proliferative activity. This is the first report to show that despite no preparative myeloablation of recipients, engrafted donor BMCs can synthesize DNA in the bone marrow and spleen. CONCLUSIONS Exogenous BMCs do not rescue non-irradiated mice from acute renal tubular damage caused by HgCl(2), despite establishment of chimerism and cell proliferation in bone marrow and spleen.
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Affiliation(s)
- T-C Fang
- Division of Nephrology, Buddhist Tzu Chi General Hospital, Hualien, Taiwan.
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Niinikoski J, Bakker D, Cronjé F, Lind F, Mathieu D, Schmutz J, Hunt T, Mani R, Romanelli M, Téot L, Wild T, Marroni A. ECHM-ETRS joint conference on oxygen and tissue repair, Ravenna, Italy, October 27-28, 2006: recommendations by the international jury. INT J LOW EXTR WOUND 2007; 6:139-42. [PMID: 17909171 DOI: 10.1177/1534734607304625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Grogan G, Hill CL, McGrath M, Hunt T. A Generic and Reproducible Route to Homo- and Heteroannular Bicyclic β-Diketones via Knochel-Type 1,4-Conjugate Additions to α,β-Unsaturated Cycloalkenones. Synlett 2006. [DOI: 10.1055/s-2005-923581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pollard PJ, Brière JJ, Alam NA, Barwell J, Barclay E, Wortham NC, Hunt T, Mitchell M, Olpin S, Moat SJ, Hargreaves IP, Heales SJ, Chung YL, Griffiths JR, Dalgleish A, McGrath JA, Gleeson MJ, Hodgson SV, Poulsom R, Rustin P, Tomlinson IPM. Accumulation of Krebs cycle intermediates and over-expression of HIF1alpha in tumours which result from germline FH and SDH mutations. Hum Mol Genet 2005; 14:2231-9. [PMID: 15987702 DOI: 10.1093/hmg/ddi227] [Citation(s) in RCA: 679] [Impact Index Per Article: 35.7] [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: 12/16/2022] Open
Abstract
The nuclear-encoded Krebs cycle enzymes, fumarate hydratase (FH) and succinate dehydrogenase (SDHB, -C and -D), act as tumour suppressors. Germline mutations in FH predispose individuals to leiomyomas and renal cell cancer (HLRCC), whereas mutations in SDH cause paragangliomas and phaeochromocytomas (HPGL). In this study, we have shown that FH-deficient cells and tumours accumulate fumarate and, to a lesser extent, succinate. SDH-deficient tumours principally accumulate succinate. In situ analyses showed that these tumours also have over-expression of hypoxia-inducible factor 1alpha (HIF1alpha), activation of HIF1alphatargets (such as vascular endothelial growth factor) and high microvessel density. We found no evidence of increased reactive oxygen species in our cells. Our data provide in vivo evidence to support the hypothesis that increased succinate and/or fumarate causes stabilization of HIF1alpha a plausible mechanism, inhibition of HIF prolyl hydroxylases, has previously been suggested by in vitro studies. The basic mechanism of tumorigenesis in HPGL and HLRCC is likely to be pseudo-hypoxic drive, just as it is in von Hippel-Lindau syndrome.
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Affiliation(s)
- P J Pollard
- Molecular and Population Genetics Laboratory, London WC2A 3PX, UK
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Ali T, Sabharwal T, Dourado RA, Padayachee TS, Hunt T, Burnand KG. Sequential cohort study of Dacron patch closure following carotid endarterectomy. Br J Surg 2005; 92:316-21. [PMID: 15672429 DOI: 10.1002/bjs.4808] [Citation(s) in RCA: 10] [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: 11/07/2022]
Abstract
BACKGROUND Carotid endarterectomy reduces the risk of stroke and death in patients with severe carotid artery stenosis. This study examined whether the technique used to close the arteriotomy influenced the rate of perioperative transient ischaemic attack (TIA), stroke or death. METHODS A cohort of 236 patients undergoing carotid endarterectomy at a single centre was studied; 117 patients had primary closure of the arteriotomy and 119 patients in a sequential series had closure with a Dacron patch. A standard endarterectomy with completion intraoperative duplex imaging and digital subtraction angiography was used throughout. RESULTS Patch closure was associated with a significant reduction in the 30-day combined death, stroke and TIA rate: 10.3 per cent for primary closure versus 2.5 per cent for patch closure (P = 0.017). The risk of any cerebral event (stroke or TIA) was also significantly reduced (7.7 versus 1.7 per cent; P = 0.033). Residual stenosis on completion angiography was more common after primary closure (24.6 versus 7.4 per cent; P = 0.003). CONCLUSION Dacron patch closure had a higher technical success rate on completion imaging and was associated with a significant reduction in the risk of perioperative stroke, TIA and death.
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Affiliation(s)
- T Ali
- Academic Department of Surgery, 1st Floor North Wing, St Thomas' Hospital, London SE1 7EH, UK.
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Abstract
Livestock production in the People's Republic of China has expanded at an unprecedented rate over the last decade and this trend is expected to continue into the foreseeable future. Government and private sector investment supports this growth, and the fact that small farmers are incorporating more animal husbandry into their work is expected to mitigate some of the concerns over recent World Trade Organization accession, particularly in the more precarious grain growing regions. Modernisation and intensification of the livestock industry in the People's Republic of China is subject to significant risks as regards both infectious and production-related diseases and within the framework of food safety and public health challenges. Although historically, the veterinary service system in the People's Republic of China has been successful in the eradication and control of major disease outbreaks, domestic and international market concerns are providing the catalyst for significant reforms in the animal health delivery system in the country. This paper provides an overview of the existing veterinary system in terms of the education and qualifications of veterinary personnel, delivery mechanisms, and future approaches to reforming the system in the context of a dynamic livestock industry in transition.
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Affiliation(s)
- B G Bedard
- Small Farmers in Global Markets Project, Suite 1605, BA Guanghua Road, Beijing, the People's Republic of China
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Abstract
An attractive strategy for tendon tissue engineering is the use of natural extracellular matrices as scaffold materials. One matrix that has been shown to promote healing and regeneration of neotissue in various applications is porcine-derived small intestinal submucosa. It was the objective of this study to investigate small intestinal submucosa for intrasynovial flexor tendon grafting in a canine model. We hypothesized that at 6 weeks small intestinal submucosa grafts would undergo host cell infiltration, neovascularization, and replacement by host neotendon. We also hypothesized that small intestinal submucosa grafts would be incorporated by the host without extensive adhesions to surrounding tissues and therefore maintain normal digit function. An intrasynovial tendon autograft was used as a gold standard. At 6 weeks the intrasynovial tendon autografts remained viable, contained normal numbers of cells along their length, and had minimal peritendinous adhesions. Four of six autografts had normal function as determined by rotation of the distal interphalangeal joint. Also at 6 weeks, the small intestinal submucosa grafts had host cell infiltration, neovascularization, and wavy, oriented tissue. However, ubiquitous adhesions together with impaired function in all cases suggest that small intestinal submucosa grafts in the configuration used are not suitable as full-length intrasynovial grafts in this tendon and animal model.
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Affiliation(s)
- K Derwin
- Department of Biomedical Engineering, The Cleveland Clinic Foundation, Cleveland, OH, USA.
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White SM, Hunt T. Anaesthesia for Homans' procedure. Eur J Anaesthesiol 2004; 21:419-20. [PMID: 15141806 DOI: 10.1017/s0265021504255119] [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: 11/07/2022]
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Zelle BA, Gruen GS, Hunt T, Speth SR. Sacral fractures with neurological injury: is early decompression beneficial? Int Orthop 2004; 28:244-51. [PMID: 15103503 PMCID: PMC3456939 DOI: 10.1007/s00264-004-0557-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/03/2004] [Indexed: 11/25/2022]
Abstract
During a 6-year period, 177 patients with a displaced sacral fracture were treated at our level-one trauma centre. At the initial presentation, 13 patients demonstrated a neurological deficit as a result of their sacral fracture. Six patients underwent surgical decompression, and seven patients were managed without surgical decompression. All patients were re-assessed at an average follow-up of 27.1 (range 12-84) months using the modified SOFCOT Index and the SF-36. Patients undergoing surgical decompression had a significantly better neurological improvement as measured by the modified SOFCOT Index (p=0.014). Moreover, patients undergoing surgical decompression had a significantly better physical function than the patients that were managed without surgical decompression, as measured by the SF-36 (p=0.044). We therefore believe that patients undergoing surgical decompression achieve better neurological improvement and better functional results.
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Affiliation(s)
- B A Zelle
- Division of Orthopaedic Traumatology, Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Kaufmann Building, Suite 1011, 3471 Fifth Avenue, PA 15213, USA.
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Naughton C, Reilly N, Powroznyk A, Aps C, Hunt T, Hunter D, Parsons RS, Sherry E, Spackman D, Wielogorski A, Feneck RO. Factors determining the duration of tracheal intubation in cardiac surgery: a single-centre sequential patient audit. Eur J Anaesthesiol 2003; 20:225-33. [PMID: 12650494 DOI: 10.1017/s0265021503000383] [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: 01/01/2023]
Abstract
BACKGROUND AND OBJECTIVE The study was designed to identify those factors associated with early tracheal extubation following cardiac surgery. Previous studies have tended to concentrate on surgery for coronary artery bypass or on other selected cohorts. METHODS Sequential cohort analysis of 296 unselected adult cardiac surgery patients was performed over 3 months. RESULTS In total, 39% of all patients were extubated within 6 h, 89% within 24 h and 95% within 48 h. Delayed extubation (>6 h after surgery) appeared unrelated to age, gender, body mass index, a previous pattern of angina or myocardial infarction, diabetes, preoperative atrial fibrillation, and preoperative cardiovascular assessment, as well as other factors. Delayed tracheal extubation was associated with poor left ventricular, renal and pulmonary function, a high Euroscore, as well as the type, duration and urgency of surgery. Early extubation (<6 h) was not associated with a reduced length of stay in either the intensive care unit or in hospital compared with patients who were extubated between 6 and 24 h. In these groups, it is presumed that organizational and not clinical factors appear to be responsible for a delay in discharge from intensive care. Patients who were extubated after 24 h had a longer duration of hospital stay and a greater incidence of postoperative complications. Postoperative complications were not adversely affected by early tracheal extubation. CONCLUSIONS In an unselected sequential cohort, both patient- and surgery-specific factors may be influential in determining the duration of postoperative ventilation of the lungs following cardiac surgery. In view of the changing nature of the surgical population, regular re-evaluation is useful in reassessing performance.
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Affiliation(s)
- C Naughton
- St Thomas' Hospital NHS Trust, London, UK
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Champion JK, Hunt T, DeLisle N. Role of routine intraoperative endoscopy in laparoscopic bariatric surgery. Surg Endosc 2002; 16:1663-5. [PMID: 12140627 DOI: 10.1007/s00464-002-8807-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2002] [Accepted: 04/09/2002] [Indexed: 10/27/2022]
Abstract
BACKGROUND Laparoscopic bariatric surgery is a challenging procedure with a high risk of technical misadventures that may increase postoperative morbidity. Routine intraoperative endoscopy may reduce postoperative morbidity. This article reviews our 6-year experience. METHODS From April 1995 to September 2001, we performed 825 laparoscopic bariatric procedures: 743 roux gastric bypasses, 55 vertical banded gastroplasties, 18 laparoscopic adjustable gastric bands, and 9 gastric pacemakers. All the patients underwent flexible endoscopy by the primary surgeon at completion of the operation to assess for technical errors. RESULTS The 34 intraoperative technical errors (4.1%) identified included 29 suture and staple line leaks, 2 bougie perforations, 2 inadvertent stoma closures secondary to the suture line, and 1 mucosal perforation in a gastric pacemaker. All the errors were successfully repaired laparoscopically at the time of the procedure. Three leaks occurred postoperative (0.36%): 1 in the 34 repaired errors (2.9%) and 2 in the remaining 791 patients (0.25%). CONCLUSIONS Routine intraoperative endoscopy identified 34 correctable technical errors in a series of 825 laparoscopic bariatric procedures. Of these, 33 (97%) were repaired successfully, which reduced postoperative morbidity.
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Affiliation(s)
- J K Champion
- Department of Surgery, Emory Dunwoody Medical Center, 4575 North Shallowford Road, Atlanta, GA 30338, USA.
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Coyne K, Revicki D, Hunt T, Corey R, Stewart W, Bentkover J, Kurth H, Abrams P. Psychometric validation of an overactive bladder symptom and health-related quality of life questionnaire: the OAB-q. Qual Life Res 2002; 11:563-74. [PMID: 12206577 DOI: 10.1023/a:1016370925601] [Citation(s) in RCA: 455] [Impact Index Per Article: 20.7] [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: 11/12/2022]
Abstract
OBJECTIVE Overactive bladder (OAB) is characterized by symptoms of urinary frequency and urgency, with and without incontinence, and has been shown to have significant impact on health-related quality of life (HRQL). Currently, no OAB-specific questionnaires exist to evaluate all symptoms of OAB; thus we sought to evaluate the psychometric properties of a newly developed OAB HRQL questionnaire. METHODS The 33-item, self-administered OAB-q contains a symptom bother and HRQL scale. Both the OAB-q and SF-36 were completed by participants from two sources: (1) a community sample who screened positive for OAB in a random-digit dial telephone survey and participated in a clinical validation study (n = 254); and (2) a clinical study of patients' seeking treatment for OAB symptoms (baseline assessment) (n = 736). Item and exploratory factor analysis were performed to assess the subscale structure of the questionnaire. Psychometric evaluation was conducted to assess reliability and validity. RESULTS Seventy-four percent of the sample were women with mean age of 58.5. Participants with continent and incontinent symptoms reported significantly greater symptom bother and HRQL impact than normal participants. Significant differences were present among all patient groups in all OAB-q subscales (p < 0.0001) except sleep where the impact of continent and incontinent OAB was similar, but significantly worse than normal participants (p < 0.0001). Internal consistency was high with the subscale Cronbach alpha-values ranging from 0.86 to 0.94. CONCLUSION The OAB-q is a reliable and valid instrument that discriminates between normal and clinically diagnosed continent and incontinent OAB participants. The OAB-q demonstrates that both continent and incontinent OAB symptoms cause significant symptom bother and have a negative impact on HRQL.
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Affiliation(s)
- K Coyne
- MEDTAP International, Inc., Bethesda, MD 20814, USA.
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Brittan M, Hunt T, Jeffery R, Poulsom R, Forbes SJ, Hodivala-Dilke K, Goldman J, Alison MR, Wright NA. Bone marrow derivation of pericryptal myofibroblasts in the mouse and human small intestine and colon. Gut 2002; 50:752-7. [PMID: 12010874 PMCID: PMC1773238 DOI: 10.1136/gut.50.6.752] [Citation(s) in RCA: 205] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIMS In order to establish whether extraintestinal cells contribute to the turnover and repair of gastrointestinal tissues, we studied the colons and small intestines of female mice that had received a male bone marrow transplant, together with gastrointestinal biopsies from female patients that had developed graft versus host disease after receiving a bone marrow transplant from male donors. METHODS Using in situ hybridisation to detect Y chromosomes and immunohistochemistry, we demonstrated that cells derived from injected bone marrow frequently engrafted into the intestine and differentiated into pericryptal myofibroblasts. RESULTS In the human intestine, we confirmed by combining in situ hybridisation with immunostaining for smooth muscle actin that the bone marrow derived cells within the intestine exhibited a myofibroblast phenotype. In female mouse recipients of male bone marrow grafts, we observed colocalisation of Y chromosomes and clusters of newly formed marrow derived myofibroblasts. While few of these were present at seven days after bone marrow transplantation, they were numerous at 14 days, and by six weeks entire columns of pericryptal myofibroblasts could be seen running up the sides of crypts in both the small intestine and colon. These columns appeared to extend into the villi in the small intestine. Within the intestinal lamina propria, these Y chromosome positive cells were negative for the mouse macrophage marker F4/80 antigen and CD34. CONCLUSIONS Bone marrow derived pericryptal myofibroblasts were present in the mouse intestine following irradiation and bone marrow transplant, and in the intestines of human patients suffering graft versus host disease following a bone marrow transplant. Our data indicate that bone marrow cells contribute to the regeneration of intestinal myofibroblasts and epithelium after damage, and we suggest that this could be exploited therapeutically.
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Affiliation(s)
- M Brittan
- Histopathology Unit, Cancer Research UK, London, UK.
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Affiliation(s)
- M R Alison
- Department of Histopathology, Faculty of Medicine, Imperial College of Science, Technology, and Medicine, London, UK.
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Abstract
A total of 139 mobile bearing knee arthroplasties in 104 patients were evaluated at a mean follow-up of 7.8 years (range, 5-13 years). There were 80 cemented knees, 50 uncemented, and 9 hybrid (cemented tibia, uncemented femur). Ten knees were revised. Four knees were revised for aseptic loosening of an uncemented tibial component, and 1 knee was revised for loosening of an uncemented femoral component. One knee was revised for a recurrent dislocating bearing, and 1 knee was revised for instability. No mechanical loosening occurred in the cemented components. Three knee arthroplasties were revised for infection. A total of 66 patients (92 knees) were evaluated clinically and radiographically. Radiographic evaluation showed a 27% incidence of radiolucent lines for the femur and a 31% incidence of radiolucent lines for the tibia. No components were considered radiographically loose. The survivorship of mobile bearing knee arthroplasties was 93% at an average follow-up of 7.8 years. Aseptic loosening was statistically higher in uncemented components (P=.0051).
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Affiliation(s)
- J M Hartford
- Division of Orthopaedic Surgery, Department of Surgery, University of Kentucky Medical Center, Lexington, Kentucky 40536, USA.
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Hunt T. Materia medica in ms London B.L. Add. 10289. Medioev Romanzo 2001; 13:25-37. [PMID: 11617671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Hunt T. [Not Available]. Romania 2001; 106:57-83. [PMID: 11635891 DOI: 10.3406/roma.1985.1737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hochegger H, Klotzbücher A, Kirk J, Howell M, le Guellec K, Fletcher K, Duncan T, Sohail M, Hunt T. New B-type cyclin synthesis is required between meiosis I and II duringXenopusoocyte maturation. Development 2001; 128:3795-807. [PMID: 11585805 DOI: 10.1242/dev.128.19.3795] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.4] [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: 11/20/2022]
Abstract
Progression through meiosis requires two waves of maturation promoting factor (MPF) activity corresponding to meiosis I and meiosis II. Frog oocytes contain a pool of inactive ‘pre-MPF’ consisting of cyclin-dependent kinase 1 bound to B-type cyclins, of which we now find three previously unsuspected members, cyclins B3, B4 and B5. Protein synthesis is required to activate pre-MPF, and we show here that this does not require new B-type cyclin synthesis, probably because of a large maternal stockpile of cyclins B2 and B5. This stockpile is degraded after meiosis I and consequently, the activation of MPF for meiosis II requires new cyclin synthesis, principally of cyclins B1 and B4, whose translation is strongly activated after meiosis I. If this wave of new cyclin synthesis is ablated by antisense oligonucleotides, the oocytes degenerate and fail to form a second meiotic spindle. The effects on meiotic progression are even more severe when all new protein synthesis is blocked by cycloheximide added after meiosis I, but can be rescued by injection of indestructible B-type cyclins. B-type cyclins and MPF activity are required to maintain c-mos and MAP kinase activity during meiosis II, and to establish the metaphase arrest at the end of meiotic maturation. We discuss the interdependence of c-mos and MPF, and reveal an important role for translational control of cyclin synthesis between the two meiotic divisions.
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Affiliation(s)
- H Hochegger
- ICRF Clare Hall Laboratories, South Mimms, Hertfordshire EN6 3LD, UK
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41
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Poulsom R, Forbes SJ, Hodivala-Dilke K, Ryan E, Wyles S, Navaratnarasah S, Jeffery R, Hunt T, Alison M, Cook T, Pusey C, Wright NA. Bone marrow contributes to renal parenchymal turnover and regeneration. J Pathol 2001; 195:229-35. [PMID: 11592103 DOI: 10.1002/path.976] [Citation(s) in RCA: 515] [Impact Index Per Article: 22.4] [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: 12/24/2022]
Abstract
In order to establish whether extra-renal cells contribute to the turnover and repair of renal tissues, this study examined kidneys of female mice that had received a male bone marrow transplant and kidney biopsies from male patients who had received kidney transplants from female donors. By using in situ hybridization to detect Y-chromosomes it could be demonstrated that circulating stem cells frequently engraft into the kidney and differentiate into renal parenchymal cells. In the human renal grafts it was confirmed that some of the recipient-derived cells within the kidney exhibited a tubular epithelial phenotype, by combining in situ hybridization with immunostaining for the epithelial markers CAM 5.2 and the lectin Ulex europaeus. Female mouse recipients of male bone marrow grafts showed co-localization of Y-chromosomes and tubular epithelial markers Ricinus communis and Lens culinaris, and a specific cytochrome P450 enzyme (CYP1A2) indicating an appropriate functional capability of clustered newly formed marrow-derived tubular epithelial cells. Y-chromosome-containing cells were observed within glomeruli, with morphology and location appropriate for podocytes. Within the murine kidney, these Y-chromosome-positive cells were negative for the mouse macrophage marker F4/80 antigen and leukocyte common antigen, but were vimentin-positive. The presence of bone marrow-derived cells was noted in both histologically normal mouse kidneys and in human transplanted kidneys suffering damage from a variety of causes. These data indicate that bone marrow cells contribute to both normal turnover of renal epithelia and regeneration after damage, and it is suggested that this could be exploited therapeutically.
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Affiliation(s)
- R Poulsom
- Histopathology Unit, Imperial Cancer Research Fund, London, UK.
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42
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Abstract
Previous studies have often revealed an absence or reduction of ganglia in Auerbach's plexus in many patients with achalasia, which has been postulated to be related to the elevated lower esophageal sphincter pressure in these patients. We undertook a prospective study to determine whether microscopic changes were present in the myenteric plexus of patients with hypertensive lower esophageal sphincter, nutcracker esophagus, and diffuse esophageal spasm and if there was a correlation with lower esophageal sphincter pressure. Nine patients (3 men and 6 women; ages 49 to 72 years, mean 58 years) underwent a laparoscopic esophagomyotomy with fundoplication for symptomatic spastic motility disorder. A 10 mm x 5 mm segment of esophageal muscle was removed from the border of the myotomy incision, fixed in formalin, and examined under light microscopy for the presence or absence of ganglia and inflammation. Correlation between the presence of ganglia and lower esophageal sphincter pressure was tested by Pearson's bivariant correlation. Manometry revealed three patients with hypertensive lower esophageal sphincter, four patients with nutcracker esophagus, and two patients with diffuse esophageal spasm. All three patients with a hypertensive lower esophageal sphincter revealed an absence of ganglia, whereas the six patients with nutcracker esophagus and diffuse esophageal spasm exhibited ganglia despite an elevated lower esophageal sphincter pressure in four. Hypertensive lower esophageal sphincter resembled achalasia in its absence of ganglia in Auerbach's plexus, whereas nutcracker esophagus and diffuse esophageal spasm exhibited ganglia. There was no significant correlation in our series between the presence of ganglia and an elevated lower esophageal sphincter pressure in spastic motility disorders.
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Affiliation(s)
- J K Champion
- Department of Surgery, Mercer University School of Medicine, Atlanta, GA, U.S.A.
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43
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Bersten AD, Hunt T, Nicholas TE, Doyle IR. Elevated plasma surfactant protein-B predicts development of acute respiratory distress syndrome in patients with acute respiratory failure. Am J Respir Crit Care Med 2001; 164:648-52. [PMID: 11520731 DOI: 10.1164/ajrccm.164.4.2010111] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [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: 12/17/2022] Open
Abstract
Surfactant protein-B is a lung specific protein secreted into the air spaces by pulmonary epithelial type II cells that leaks into the bloodstream in increased amounts in patients with ARDS. To test whether elevated plasma levels of surfactant protein-B would predict the development of ARDS in patients with acute hypoxemic respiratory failure, plasma and lung injury scores were collected at study entry and daily thereafter for 3 d from 54 patients admitted to our intensive care unit. ARDS was defined as a new bilateral infiltrate on chest radiograph and a lung injury score > or = 2.5. Twenty patients developed ARDS, of whom seven died. Although the initial lung injury score was not predictive of ARDS, the initial plasma surfactant protein-B was predictive (area under the curve = 0.77 [0.63 to 0.90], nonparametric receiver-operating characteristic analysis). In this cohort, plasma surfactant protein-B was particularly predictive of ARDS when applied to patients suffering a direct lung insult (area under the curve = 0.87 [0.72 to 1.02]), with a sensitivity of 85% (95% CI: 55 to 98%) and specificity of 78% (40 to 97%) at a cutoff of 4,994 ng/ml.
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Affiliation(s)
- A D Bersten
- Department of Critical Care Medicine, Flinders Medical Centre and School of Medicine, Flinders University, South Australia.
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44
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Ellenrieder C, Bartosch B, Lee GY, Murphy M, Sweeney C, Hergersberg M, Carrington M, Jaussi R, Hunt T. The long form of CDK2 arises via alternative splicing and forms an active protein kinase with cyclins A and E. DNA Cell Biol 2001; 20:413-23. [PMID: 11506705 DOI: 10.1089/104454901750361479] [Citation(s) in RCA: 15] [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: 11/12/2022] Open
Abstract
We have reinvestigated the long form of cyclin-dependent kinase (CDK)2 that is expressed in many rodent cells. We show that the mRNA encoding CDK2L arises by alternative splicing and that the encoded protein can bind to, and be activated by, cyclins A and E. The complex of CDK2L with cyclin A has about half the specific activity of the equivalent CDK2-cyclin A complex. Also, CDK2L--cyclin A is inhibited to the same extent and by the same concentrations of p21(CIP1) as CDK2--cyclin A. The nucleotide sequences of intron V in the human and murine CDK2 genes, where the sequences encoding the 48-residue insert in CDK2L are located, show very high conservation in the position of the alternatively spliced exon and its surroundings. Despite this, we were not able to detect significant expression of CDK2L in human cell lines, although a low level is expressed in COS-1 cells from monkeys.
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Affiliation(s)
- C Ellenrieder
- Paul Scherrer Institute, Institute for Medical Radiobiology, 5232 Villigen-PSI, Switzerland
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45
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Sohail M, Hochegger H, Klotzbücher A, Guellec RL, Hunt T, Southern EM. Antisense oligonucleotides selected by hybridisation to scanning arrays are effective reagents in vivo. Nucleic Acids Res 2001; 29:2041-51. [PMID: 11353073 PMCID: PMC55457 DOI: 10.1093/nar/29.10.2041] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [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: 11/13/2022] Open
Abstract
Transcripts representing mRNAs of three Xenopus cyclins, B1, B4 and B5, were hybridised to arrays of oligonucleotides scanning the first 120 nt of the coding region to assess the ability of the immobilised oligonucleotides to form heteroduplexes with their targets. Oligonucleotides that produced high heteroduplex yield and others that showed little annealing were assayed for their effect on translation of endogenous cyclin mRNAs in Xenopus egg extracts and their ability to promote cleavage of cyclin mRNAs in oocytes by RNase H. Excellent correlation was found between antisense potency and affinity of oligonucleotides for the cyclin transcripts as measured by the array, despite the complexity of the cellular environment.
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Affiliation(s)
- M Sohail
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
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England GC, McGrath TP, Gilmer L, Seebold JG, Lev-On M, Hunt T. Hazardous air pollutant emissions from gas-fired combustion sources: emissions and the effects of design and fuel type. Chemosphere 2001; 42:745-764. [PMID: 11219701 DOI: 10.1016/s0045-6535(00)00249-6] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Air emissions from gas-fired combustion devices such as boilers, process heaters, gas turbines and stationary reciprocating engines contain hazardous air pollutants (HAPs) subjected to consideration under the federal clean air act (CAA). This work presents a recently completed major research project to develop an understanding of HAP emissions from gas-fired boilers and process heaters and new HAP emission factors based on field emission tests of gas-fired external combustion devices used in the petroleum industry. The effect of combustion system design and operating parameters on HAP emissions determined by both field and research tests are discussed. Data from field tests of gas-fired petroleum industry boilers and heaters generally show very low emission levels of organic HAPs. A comparison of the emission data for boilers and process heaters, including units with and without various forms of NOx emission controls, showed no significant difference in organic HAP emission characteristics due to process or burner design. This conclusion is also supported by the results of research tests with different burner designs. Based on field tests of units fired with natural gas and various petroleum industry process gases and research tests in which gas composition was intentionally varied, organic HAP emissions were not determined to be significantly affected by the gas composition. Research data indicate that elevated organic HAP emission levels are found only under extreme operating conditions (starved air or high excess air combustion) associated with poor combustion.
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Affiliation(s)
- G C England
- GE-Energy and Environmental Research Corporation, Irvine, CA 92618, USA.
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47
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Hunt T, Tong S, Burrows M, James M. The use of echocardiographic colour kinetic wall motion to differentiate broad complex tachycardia. Int J Cardiovasc Imaging 2001; 17:19-28. [PMID: 11495505 DOI: 10.1023/a:1010643712576] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Discrimination between supraventricular tachycardia (SVT) with aberrant conduction from ventricular tachycardia (VT) is vital for the safe and effective management of both conditions. Electrocardiographic algorithms for the differentiation of broad complex tachycardia are complex and difficult to implement in the acute setting, with misdiagnosis occurring in up to 40% of acute presentations. This case study shows the potential for echocardiographic colour kinesis (eck) to support electrocardiographic differentiation. A 74-year old man in sinus rhythm with left bundle branch block (lbbb), a history of myocardial infarction and recurrent sustained VT underwent eck analysis of wall motion propagation during a programmed electrical ventricular stimulation study. Sequential 40 ms time frames of echocardiographic colour coded endocardial wall motion velocity were recorded on video during both induced VT of lbbb configuration and near isochronic atrially paced tachycardia in lbbb. During VT there was initial eck propagation of ventricular septal wall motion from the apex to the atria secondary to electrical depolarisation. During atrially paced tachycardia initial eck motion developed in the interatrial septum and atrial wall followed by propagation in the ventricular endocardial septal wall motion from the atria toward the ventricular apex. This eck technique potentially could be used to support the electrocardiographic diagnosis of a broad complex tachycardia.
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Affiliation(s)
- T Hunt
- Cardiology Department, Musgrov Park Hospital, Taunton, UK.
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Cummings K, Barrett E, Mohle-Boetani JC, Brooks JT, Farrar J, Hunt T, Fiore A, Komatsu K, Werner SB, Slutsker L. A multistate outbreak of Salmonella enterica serotype Baildon associated with domestic raw tomatoes. Emerg Infect Dis 2001; 7:1046-8. [PMID: 11747740 PMCID: PMC2631895 DOI: 10.3201/eid0706.010625] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Salmonella enterica serotype Baildon, a rare serotype, was recovered from 86 persons in eight states; 87% of illnesses began during a 3-week period ending January 9, 1999. Raw restaurant-prepared tomatoes were implicated in multiple case-control studies. Contamination likely occurred on the farm or during packing; more effective disinfection and prevention strategies are needed.
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Affiliation(s)
- K Cummings
- Disease Investigations Section, Division of Communicable Disease Control, California Department of Health Services, Berkeley, 94704, USA.
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49
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Affiliation(s)
- T Hunt
- ICRF Clare Hall Laboratories, South Mimms, EN6 3LD., Herts, UK
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50
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Yamano H, Kitamura K, Kominami K, Lehmann A, Katayama S, Hunt T, Toda T. The spike of S phase cyclin Cig2 expression at the G1-S border in fission yeast requires both APC and SCF ubiquitin ligases. Mol Cell 2000; 6:1377-87. [PMID: 11163211 DOI: 10.1016/s1097-2765(00)00135-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [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: 11/25/2022]
Abstract
We describe a novel set of oscillation mechanisms for the fission yeast S phase cyclin Cig2, which contains an authentic destruction box and is destroyed at anaphase via the APC/cyclosome (APC/C). Unlike the mitotic cyclin Cdc13, however, Cig2 mRNA and protein peak at the G1/S boundary and decline to low levels in G2 and M phases. We show here that SCF(Pop1, Pop2) plays a role in transcriptional periodicity, as pop mutations result in constitutive cig2(+) transcripts. The instability of Cig2 during G2 and M is independent of either the APC/C or Pop1/Pop2, but requires Skp1, a core component of SCF. These data indicate that the APC/C and SCF control Cig2 levels differentially at different stages of the cell cycle.
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Affiliation(s)
- H Yamano
- Laboratory of Cell Cycle Control, Imperial Cancer Research Fund, South Mimms, Herts EN6 3LD, United Kingdom
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