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Laguna A, Harwell A, Angenent-Mari V, Buchanan S, Persad-Paisley E, Ahn S. Abstract No. 285 Assessment of Readability and Quality of Spanish-Language Online Uterine Artery Embolization Patient Education Resources. J Vasc Interv Radiol 2023. [DOI: 10.1016/j.jvir.2022.12.352] [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: 02/27/2023] Open
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Umaretiya PJ, Fisher L, Altschuler A, Kushi LH, Chao CR, Vega B, Rodrigues G, Josephs I, Brock KE, Buchanan S, Casperson M, Fasciano KM, Kolevska T, Lakin JR, Lefebvre A, Schwartz CM, Shalman DM, Wall CB, Wiener L, Bona K, Mack JW. "The simple life experiences that every other human gets": Desire for normalcy among adolescents and young adults with advanced cancer. Pediatr Blood Cancer 2023; 70:e30035. [PMID: 36308744 DOI: 10.1002/pbc.30035] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Adolescents and young adults (AYAs) with advanced cancer identify normalcy as an important component of quality end-of-life care. We sought to define domains of normalcy and identify ways in which clinicians facilitate or hinder normalcy during advanced cancer care. PROCEDURE This was a secondary analysis of a qualitative study that aimed to identify priority domains for end-of-life care. Content analysis of semi-structured interviews among AYAs aged 12-39 years with advanced cancer, caregivers, and clinicians was used to evaluate transcripts. Coded excerpts were reviewed to identify themes related to normalcy. RESULTS Participants included 23 AYAs with advanced cancer, 28 caregivers, and 29 clinicians. Participants identified five domains of normalcy including relationships, activities, career/school, milestones, and appearance. AYAs and caregivers identified that clinicians facilitate normalcy through exploration of these domains with AYAs, allowing flexibility in care plans, identification of short-term and long-term goals across normalcy domains, and recognizing losses of normalcy that occur during cancer care. CONCLUSIONS AYAs with cancer experience multiple threats to normalcy during advanced cancer care. Clinicians can attend to normalcy and improve AYA quality of life by acknowledging these losses through ongoing discussions on how best to support domains of normalcy and by reinforcing AYA identities beyond a cancer diagnosis.
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Affiliation(s)
- Puja J Umaretiya
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Pediatric Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Lauren Fisher
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Andrea Altschuler
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA
| | - Lawrence H Kushi
- Division of Research, Kaiser Permanente Northern California, Oakland, California, USA
| | - Chun R Chao
- Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, California, USA
| | - Brenda Vega
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Gilda Rodrigues
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | | | - Katharine E Brock
- Divisions of Pediatric Oncology and Palliative Care, Emory University, Atlanta, Georgia, USA.,Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| | | | | | - Karen M Fasciano
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Tatjana Kolevska
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland, California, USA
| | - Joshua R Lakin
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Anna Lefebvre
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Corey M Schwartz
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland, California, USA
| | - Dov M Shalman
- Department of Palliative Care, Kaiser Permanente Southern California, Pasadena, California, USA
| | - Catherine B Wall
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Lori Wiener
- Psychosocial Support and Research Program, National Cancer Institute, Bethesda, Maryland, USA
| | - Kira Bona
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Pediatric Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Jennifer W Mack
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Pediatric Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts, USA
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Odejide OO, Fisher L, Kushi LH, Chao CR, Vega B, Rodrigues G, Josephs I, Brock KE, Buchanan S, Casperson M, Cooper RM, Fasciano KM, Kolevska T, Lakin JR, Lefebvre A, Schwartz CM, Shalman DM, Wall CB, Wiener L, Altschuler A, Mack JW. Patient, Family, and Clinician Perspectives on Location of Death for Adolescents and Young Adults With Cancer. JCO Oncol Pract 2022; 18:e1621-e1629. [PMID: 35981281 PMCID: PMC9810128 DOI: 10.1200/op.22.00143] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/24/2022] [Accepted: 07/11/2022] [Indexed: 01/14/2023] Open
Abstract
PURPOSE Adolescents and young adults (AYAs) with cancer have high rates of hospital deaths. It is not clear if this reflects their preferences or barriers to dying at home. METHODS Between December 2018 and January 2021, we conducted in-depth interviews with AYAs (age 12-39 years) with stage IV or recurrent cancer, family caregivers including bereaved caregivers, and clinicians of AYAs with cancer. Patients were asked about their priorities for care including location of death, caregivers were asked what was most important in the care of their AYA family member, and clinicians were asked to reflect on priorities identified through caring for AYAs. Directed content analysis was applied to interview data, and themes regarding location of death were developed. RESULTS Eighty individuals (23 AYAs, 28 caregivers, and 29 clinicians) participated in interviews. Most AYAs and caregivers preferred a home death. However, some AYAs and caregivers opted for a hospital death to alleviate caregiver burden or protect siblings from the perceived trauma of witnessing a home death. Lack of adequate services to manage intractable symptoms at home and insufficient caregiver support led some AYAs/caregivers to opt for hospital death despite a preference for home death. Participants acknowledged the value of hospice while also pointing out its limitations in attaining a home death. CONCLUSION Although most AYAs prefer to die at home, this preference is not always achieved. Robust home-based services for effective symptom management and caregiver support are needed to close the gap between preferred and actual location of death for AYAs.
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Affiliation(s)
- Oreofe O. Odejide
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, MA
| | - Lauren Fisher
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, MA
| | - Lawrence H. Kushi
- Division of Research, Kaiser Permanente Northern California, Oakland, CA
| | - Chun R. Chao
- Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena, CA
| | - Brenda Vega
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, MA
| | - Gilda Rodrigues
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, MA
| | | | - Katharine E. Brock
- Division of Pediatric Oncology, Emory University, Atlanta, GA
- Division of Palliative Care, Emory University, Atlanta, GA
- Aflac Cancer and Blood Disorders Center at Children's Healthcare of Atlanta, Atlanta, GA
| | - Susan Buchanan
- Agios Pharmaceuticals, Cambridge, MA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA
| | | | - Robert M. Cooper
- Pediatric Oncology, Kaiser Permanente Southern California, Pasadena, CA
| | - Karen M. Fasciano
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, MA
| | - Tatjana Kolevska
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland, CA
| | - Joshua R. Lakin
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, MA
| | - Anna Lefebvre
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Corey M. Schwartz
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland, CA
| | - Dov M. Shalman
- Palliative Care, Kaiser Permanente Southern California, Pasadena, CA
| | - Catherine B. Wall
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Lori Wiener
- Psychosocial Support and Research Program, National Cancer Institute, Bethesda, MD
| | - Andrea Altschuler
- Division of Research, Kaiser Permanente Northern California, Oakland, CA
| | - Jennifer W. Mack
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, MA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA
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Li A, Tang Q, Kearney KE, Nagy KL, Zhang J, Buchanan S, Turyk ME. Corrigendum to "Persistent and Toxic Chemical Pollutants in Fish Consumed by Asians in Chicago, United States" [Sci. Total Environ. 811 (2022):152214/ DOI:10.1016/j.scitotenv.2021.152214]. Sci Total Environ 2022; 825:154055. [PMID: 35228008 PMCID: PMC9461703 DOI: 10.1016/j.scitotenv.2022.154055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Consumption of seafood brings health benefits but may increase the ingestion of contaminants. Compared with other ethnic groups in the U.S., Asians consume seafood more frequently. However, there is little information about how culturally specific fish consumption contributes to exposure to toxicants. In this work, we surveyed fish consumption among Chinese, Korean and Vietnamese communities and purchased 103 seafood samples from local markets in Chicago. Each sample was analyzed for mercury (Hg) and 92 organic chemicals including polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), and Dechlorane Plus and related compounds (DPs). The rank order of pollutant concentration in all samples was Hg » Σ66PCBs > Σ17OCPs > Σ8PBDEs > Σ8DPs. Positive correlations were noted among most contaminant groups. Bluefish, pike, tuna steak, and albacore tuna had the highest mean Hg (>300 ng/g). The mean Σ66PCBs was highest in pike and bluefish (>100 ng/g) followed by pollock and mackerel (>40 ng/g). Overall, octopus, shrimp and tilapia were the least contaminated; while pike, bluefish, and pollock were the most contaminated. Omega-3 fatty acids were more strongly affiliated with the organic contaminants than mercury. A risk assessment identified seven types of fish that should have consumption limitations and six that should not be consumed. For these seafoods, consumption advice based on Hg levels would adequately protect health, except for mackerel. In the survey participants, 10.3% of seafood mass consumed is from types of fish that should be limited to 1 or 2 meals/week, while 1.3% of the seafood mass consumed comes from types that should not be consumed at all. This work adds additional contaminants to the profile of health risks resulting from fish consumption among Asian Americans, which can be used in interventions aimed at conserving consumption of healthy fish while avoiding contaminants.
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Affiliation(s)
- An Li
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Qiaozhi Tang
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Kenneth E Kearney
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, United States
| | - Kathryn L Nagy
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, United States
| | - Jing Zhang
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Susan Buchanan
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Mary E Turyk
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States.
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Li A, Tang Q, Kearney KE, Nagy KL, Zhang J, Buchanan S, Turyk ME. Persistent and toxic chemical pollutants in fish consumed by Asians in Chicago, United States. Sci Total Environ 2022; 811:152214. [PMID: 34890661 PMCID: PMC9427179 DOI: 10.1016/j.scitotenv.2021.152214] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/09/2021] [Accepted: 12/02/2021] [Indexed: 05/13/2023]
Abstract
Consumption of seafood brings health benefits but may increase the ingestion of contaminants. Compared with other ethnic groups in the U.S., Asians consume seafood more frequently. However, there is little information about how culturally specific fish consumption contributes to exposure to toxicants. In this work, we surveyed fish consumption among Chinese, Korean and Vietnamese communities and purchased 103 seafood samples from local markets in Chicago. Each sample was analyzed for mercury (Hg) and 92 organic chemicals including polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), and Dechlorane Plus and related compounds (DPs). The rank order of pollutant concentration in all samples was Hg ≫ Σ66PCBs > Σ17OCPs > Σ8PBDEs > Σ8DPs. Positive correlations were noted among most contaminant groups. Bluefish, pike and tuna steak had the highest mean Hg (>1 mg/kg). The mean Σ66PCBs was highest in pike and bluefish (>100 ng/g) followed by pollock and mackerel (>40 ng/g). Overall, octopus, shrimp and tilapia were the least contaminated; while pike, bluefish, and pollock were the most contaminated. Omega-3 fatty acids were more strongly affiliated with the organic contaminants than mercury. A risk assessment identified seven types of fish that should have consumption limitations and six that should not be consumed. For these seafoods, consumption advice based on Hg levels would adequately protect health. In the survey participants, 17% of seafood mass consumed is from types of fish that should be limited to 1 or 2 meals/week, while 7% of the seafood mass consumed comes from types that should not be consumed at all. This work adds additional contaminants to the profile of health risks resulting from fish consumption among Asian Americans, which can be used in interventions aimed at conserving consumption of healthy fish while avoiding contaminants.
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Affiliation(s)
- An Li
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Qiaozhi Tang
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Kenneth E Kearney
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, United States
| | - Kathryn L Nagy
- Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, United States
| | - Jing Zhang
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Susan Buchanan
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Mary E Turyk
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States.
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Mack JW, Fisher L, Kushi L, Chao CR, Vega B, Rodrigues G, Josephs I, Brock KE, Buchanan S, Casperson M, Cooper RM, Fasciano KM, Kolevska T, Lakin JR, Lefebvre A, Schwartz CM, Shalman DM, Wall CB, Wiener L, Altschuler A. Patient, Family, and Clinician Perspectives on End-of-Life Care Quality Domains and Candidate Indicators for Adolescents and Young Adults With Cancer. JAMA Netw Open 2021; 4:e2121888. [PMID: 34424305 PMCID: PMC8383130 DOI: 10.1001/jamanetworkopen.2021.21888] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
IMPORTANCE End-of-life care quality indicators specific to adolescents and young adults (AYAs) aged 12 to 39 years with cancer have not been developed. OBJECTIVE To identify priority domains for end-of-life care from the perspectives of AYAs, family caregivers, and clinicians, and to propose candidate quality indicators reflecting priorities. DESIGN, SETTING, AND PARTICIPANTS This qualitative study was conducted from December 6, 2018, to January 5, 2021, with no additional follow-up. In-depth interviews were conducted with patients, family caregivers, and clinicians and included a content analysis of resulting transcripts. A multidisciplinary advisory group translated priorities into proposed quality indicators. Interviews were conducted at the Dana-Farber Cancer Institute, Kaiser Permanente Northern California, Kaiser Permanente Southern California, and an AYA cancer support community (lacunaloft.org). Participants included 23 AYAs, 28 caregivers, and 29 clinicians. EXPOSURE Stage IV or recurrent cancer. MAIN OUTCOMES AND MEASURES Care priorities. RESULTS Interviews were conducted with 23 patients (mean [SD] age, 29.3 [7.3] years; 12 men [52%]; 18 White participants [78%]), 28 family caregivers (23 women [82%]; 14 White participants [50%]), and 29 clinicians (20 women [69%]; 13 White participants [45%]). Caregivers included 22 parents (79%), 5 spouses or partners (18%), and 1 other family member (4%); the 29 clinicians included 15 physicians (52%), 6 nurses or nurse practitioners (21%), and 8 social workers or psychologists (28%). Interviews identified 7 end-of-life priority domains: attention to physical symptoms, attention to quality of life, psychosocial and spiritual care, communication and decision-making, relationships with clinicians, care and treatment, and independence. Themes were consistent across the AYA age range and participant type. Although some domains were represented in quality indicators developed for adults, unique domains were identified, as well as AYA-specific manifestations of existing domains. For example, quality of life included global quality of life; attainment of life goals, legacy, and meaning; support of personal relationships; and normalcy. Within communication and decision-making, domains included communication early in the disease course, addressing prognosis and what to expect at the end of life, and opportunity for AYAs to hold desired roles in decision-making. Care and treatment domains relevant to cancer therapy, use of life-prolonging measures, and location of death emphasized the need for preference sensitivity rather than a standard path. This finding differs from existing adult indicators that propose that late-life chemotherapy, intensive measures, and hospital death should be rare. CONCLUSIONS AND RELEVANCE The findings of this qualitative study suggest that AYAs with cancer have priorities for care at the end of life that are not fully encompassed in existing indicators for adults. Use of new indicators for this young population may better reflect patient- and family-centered experiences of quality care.
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Affiliation(s)
- Jennifer W Mack
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Lauren Fisher
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Larry Kushi
- Division of Research, Kaiser Permanente Northern California, Oakland
| | - Chun R Chao
- Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena
| | - Brenda Vega
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Gilda Rodrigues
- Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts
| | | | - Katharine E Brock
- Divisions of Pediatric Oncology and Palliative Care, Emory University and Aflac Cancer & Blood Disorders Center at Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Susan Buchanan
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
- Now with Agios Pharmaceuticals, Cambridge, Massachusetts
| | | | - Robert M Cooper
- Department of Pediatric Oncology, Kaiser Permanente Southern California, Pasadena
| | - Karen M Fasciano
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Tatjana Kolevska
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland
| | - Joshua R Lakin
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Anna Lefebvre
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Corey M Schwartz
- Division of Medical Oncology, Kaiser Permanente Northern California, Oakland
| | - Dov M Shalman
- Department of Palliative Care, Kaiser Permanente Southern California, Pasadena
| | - Catherine B Wall
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Lori Wiener
- Psychosocial Support and Research Program, National Cancer Institute, Bethesda, Maryland
| | - Andrea Altschuler
- Division of Research, Kaiser Permanente Northern California, Oakland
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Szwiec E, Friedman L, Buchanan S. Levels of Ethylene Oxide Biomarker in an Exposed Residential Community. Int J Environ Res Public Health 2020; 17:E8646. [PMID: 33233319 PMCID: PMC7700168 DOI: 10.3390/ijerph17228646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to examine whether there is a difference in ethylene oxide (EtO) biomarker levels based on residential proximity to facilities emitting EtO, a carcinogen. We recruited residents living near two EtO-emitting facilities and administered a questionnaire on items such as address and length of residency, smoking habits, occupational exposures to EtO, and demographics. We also collected venous blood samples to measure an EtO biomarker, hemoglobin adduct N-2-hydroxyethyl-valine (HbEO), and cotinine, a metabolite of nicotine. Questionnaires and blood samples were collected from 93 participants. The overall geometric HbEO adduct level was 35.0 pmol/gmHb and for nonsmokers it was 29.7 pmol/gmHb. Mean HbEO adduct levels were not significantly associated with sex, age, race, BMI, or education level. HbEO adduct levels for nonsmoking participants who lived in a neighborhood approximately 0.8 km from one of the facilities were significantly higher compared to persons living farther away (p < 0.001). These results suggest that facilities that emit EtO may put nearby communities at risk of cancer and other associated health outcomes.
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Affiliation(s)
| | | | - Susan Buchanan
- Division of Environmental and Occupational Health Sciences, School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, USA; (E.S.); (L.F.)
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Liu Y, Li A, Buchanan S, Liu W. Exposure characteristics for congeners, isomers, and enantiomers of perfluoroalkyl substances in mothers and infants. Environ Int 2020; 144:106012. [PMID: 32771830 DOI: 10.1016/j.envint.2020.106012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 07/23/2020] [Accepted: 07/24/2020] [Indexed: 05/24/2023]
Abstract
Per- and polyfluoroalkyl substances (PFASs) are ubiquitous in the environment, making it inevitable for humans to be exposed to these pollutants. The exposure begins while in utero and continues in infancy, during the potentially most sensitive early stages of life. This review summarizes the current knowledge on pre- and neo-natal exposures based on more than 200 articles published from 2000 to date. All relevant biological matrices used in the cited studies were included, such as maternal blood, umbilical cord blood, breast milk, placenta, amniotic fluid, fetal organs, newborns' dried blood spots, and infant serum. We show that such exposures are geographically global with significant discrepancies among countries and continents, and that while the levels of major legacy PFASs (PFOS and PFOA) have declined since 2000, those of others may have not. We also show that levels of PFOS and PFOA exceed those of some major environmental toxins, such as p,p'-DDE, BDE-47, PCB-153, PBB-153, and OH-PBDEs in maternal blood. Given that the behavior and potential effects have an origin in molecular structure, biomonitoring and research at the levels of isomers and enantiomers are critically important. Through critical analysis of these works, we summarize the major achievements, consensus, and the deficiencies of existing research. To our knowledge, this is the first review on the overall internal exposure status of mothers and infants to PFASs during pregnancy and lactation.
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Affiliation(s)
- Yingxue Liu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, Institution of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - An Li
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Susan Buchanan
- School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Weiping Liu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, Institution of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
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Poulikakos P, Wu X, Yang X, Xiong Y, Ito T, Ahmed T, Karoulia Z, Adamopoulos C, Li R, Wang H, Wang L, Xie L, Liu J, Ueberheide B, Aaronson S, Chen X, Buchanan S, Sellers W, Jin J. Distinct CDK6 complexes determine tumor cell response to CDK4/6 inhibitors and degraders. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31082-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Wozniak TM, Cuningham W, Buchanan S, Coulter S, Baird RW, Nimmo GR, Blyth CC, Tong SYC, Currie BJ, Ralph AP. Geospatial epidemiology of Staphylococcus aureus in a tropical setting: an enabling digital surveillance platform. Sci Rep 2020; 10:13169. [PMID: 32759953 PMCID: PMC7406509 DOI: 10.1038/s41598-020-69312-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 07/03/2020] [Indexed: 01/21/2023] Open
Abstract
Delivery of information to clinicians on evolving antimicrobial susceptibility needs to be accurate for the local needs, up-to-date and readily available at point of care. In northern Australia, bacterial infection rates are high but resistance to first- and second-line antibiotics is poorly described and currently-available datasets exclude primary healthcare data. We aimed to develop an online geospatial and interactive platform for aggregating, analysing and disseminating data on regional bacterial pathogen susceptibility. We report the epidemiology of Staphylococcus aureus as an example of the power of digital platforms to tackle the growing spread of antimicrobial resistance in a high-burden, geographically-sparse region and beyond. We developed an online geospatial platform called HOTspots that visualises antimicrobial susceptibility patterns and temporal trends. Data on clinically-important bacteria and their antibiotic susceptibility profiles were sought from retrospectively identified clinical specimens submitted to three participating pathology providers (96 unique tertiary and primary healthcare centres, n = 1,006,238 tests) between January 2008 and December 2017. Here we present data on S. aureus only. Data were available on specimen type, date and location of collection. Regions from the Australian Bureau of Statistics were used to provide spatial localisation. The online platform provides an engaging visual representation of spatial heterogeneity, demonstrating striking geographical variation in S. aureus susceptibility across northern Australia. Methicillin resistance rates vary from 46% in the west to 26% in the east. Plots generated by the platform show temporal trends in proportions of S. aureus resistant to methicillin and other antimicrobials across the three jurisdictions of northern Australia. A quarter of all, and up to 35% of methicillin-resistant S. aureus (MRSA) blood isolates in parts of the northern Australia were resistant to inducible-clindamycin. Clindamycin resistance rates in MRSA are worryingly high in regions of northern Australia and are a local impediment to empirical use of this agent for community MRSA. Visualising routinely collected laboratory data with digital platforms, allows clinicians, public health physicians and guideline developers to monitor and respond to antimicrobial resistance in a timely manner. Deployment of this platform into clinical practice supports national and global efforts to innovate traditional disease surveillance systems with the use of digital technology and to provide practical solutions to reducing the threat of antimicrobial resistance.
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Affiliation(s)
- T M Wozniak
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia.
| | - W Cuningham
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia
| | - S Buchanan
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia
| | - S Coulter
- Queensland Health, Communicable Diseases Branch, Brisbane, Queensland, Australia
| | - R W Baird
- Territory Pathology, Northern Territory Government, Darwin, Northern Territory, Australia
| | - G R Nimmo
- Pathology Queensland Central Laboratory, Griffith University School of Medicine, Brisbane, Queensland, Australia
| | - C C Blyth
- Wesfarmers Centre of Vaccines and Infectious Diseases, Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia.,Department of Infectious Diseases, Perth Children's Hospital, Perth, Western Australia, Australia.,PathWest Laboratory Medicine, Perth, Western Australia, Australia
| | - S Y C Tong
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia.,Victorian Infectious Disease Service, The Royal Melbourne Hospital and Doherty Department University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - B J Currie
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - A P Ralph
- Menzies School of Health Research, Global & Tropical Health, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
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Tektonidis T, Esser P, Coe S, Maddock J, Buchanan S, Mavrommati F, Schott J, Izadi H, Richards M, Dawes H. MON-LB692: Diet Quality in Late Midlife is Associated with Faster Walking Speed in Later Life in Women, but Not Men: Findings From a British Birth Cohort. Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32147-8] [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: 11/15/2022]
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12
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Seagle B, Buchanan S, Strohl A, Lurain J, Shahabi S. Overall survival among American women with gestational trophoblastic neoplasia: A National Cancer Data Base study. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Liu Y, Buchanan S, Anderson HA, Xiao Z, Persky V, Turyk ME. Association of methylmercury intake from seafood consumption and blood mercury level among the Asian and Non-Asian populations in the United States. Environ Res 2018; 160:212-222. [PMID: 29020643 DOI: 10.1016/j.envres.2017.09.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/25/2017] [Accepted: 09/28/2017] [Indexed: 05/19/2023]
Abstract
BACKGROUND MeHg is a well-established neurotoxicant for fetal brain growth and development and has been shown to increase the risk of cardiovascular disease in aging populations. In the U.S., Asian populations are of particular concern because of their seafood consumption behaviors. OBJECTIVES Our objective was to calculate the average daily MeHg intake (ADMI) from seafood and to assess the relationship between ADMI with blood methylmercury (BMeHg) concentrations, specifically among women of reproductive age (WORA) and adults ≥ 50 years of age. METHODS We estimated ADMI from seafood using the 30-day fish consumption data from the NHANES 2011-2014 datasets. Using multivariable linear regression, we estimated the proportional change in mean BMeHg associated with a doubling of the ADMI. Further, correlations between ADMI and BMeHg were compared between Asians and other racial/ethnic groups. RESULTS Our analysis found both Asian WORA and Asian adults age ≥ 50 years old had significantly higher BMeHg levels and ADMI than their Non-Asian counterparts. Correlations between ADMI from seafood and blood Hg levels were stronger among Asian WORA than among Non-Asian WORA. Key fish species that influenced the dietary MeHg intake for Asians were mackerel, tuna, and "other known/unknown fish species". CONCLUSION We confirmed that Asian populations have higher MeHg intake than the Non-Asian population in the U.S. and seafood intake is a key predictor of blood Hg concentration, especially among Asian women of reproductive age. Future studies should incorporate information on other known and unknown fish species that are frequently consumed by Asian populations and different parts and fish organs eaten to better understand determinants of MeHg exposure.
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Affiliation(s)
- Yangyang Liu
- University of Illinois at Chicago, School of Public Health, Division of Epidemiology and Biostatistics, 1603 West Taylor Street, Chicago, IL, USA.
| | - Susan Buchanan
- University of Illinois at Chicago, School of Public Health, Environmental and Occupational Health Sciences, 2121 West Taylor Street, Chicago, IL, USA
| | - Henry A Anderson
- University of Wisconsin-Madison, Department of Population Health Sciences, 614 Walnut Street, Madison, WI, USA
| | - Zhiwen Xiao
- University of Illinois at Chicago, School of Public Health, Environmental and Occupational Health Sciences, 2121 West Taylor Street, Chicago, IL, USA
| | - Victoria Persky
- University of Illinois at Chicago, School of Public Health, Division of Epidemiology and Biostatistics, 1603 West Taylor Street, Chicago, IL, USA
| | - Mary E Turyk
- University of Illinois at Chicago, School of Public Health, Division of Epidemiology and Biostatistics, 1603 West Taylor Street, Chicago, IL, USA
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Ward V, Parsons G, Buchanan S, Grote H, Dahdelah S, Farmer S, Grieve J, Jaunmuktane Z, Shah S, Isenberg D, Zandi M, Gandhi S. PO145 Strange rheuminations. J Neurol Neurosurg Psychiatry 2017. [DOI: 10.1136/jnnp-2017-abn.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Bauer S, Buchanan S, Ryan I. Tyrosine Kinase Inhibitors for the Treatment of Chronic-Phase Chronic Myeloid Leukemia: Long-Term Patient Care and Management. J Adv Pract Oncol 2016; 7:42-54. [PMID: 27713843 PMCID: PMC5045277 DOI: 10.6004/jadpro.2016.7.1.3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Several tyrosine kinase inhibitors (TKIs) are now approved for the treatment of chronic myeloid leukemia in chronic phase. The efficacy of these drugs has been repeatedly demonstrated, as has their tolerability in most patients. However, late and chronic toxicities become an important issue for many patients facing long-term TKI exposure. For patients on long-term imatinib, gastrointestinal events, fluid retention, muscle cramps, fatigue, and hepatotoxicity are among the most common and most clinically relevant adverse events (AEs). A few of these have also emerged as important AEs with some of the newer TKIs. Distinct long-term toxicity concerns have emerged for dasatinib (pleural effusion, pulmonary hypertension, headache, and dyspnea) and nilotinib (rash, headache, myalgia, alopecia, and hyperglycemia), whereas due to the recent approval of bosutinib and ponatinib, their long-term toxicity profiles have not been fully characterized. Clinical experience with each of these drugs is accumulating, and ensuring proper adherence and monitoring for potential AEs is essential for effective treatment.
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Affiliation(s)
- Stephanie Bauer
- 1Department of Internal Medicine, Washington University, St. Louis, Missouri; 2Adult Leukemia Program, Dana-Farber Cancer Institute, Boston, Massachusetts; 3Department of Internal Medicine and Department of Hematology/Oncology, University of Michigan Health System, Ann Arbor, Michigan
| | - Susan Buchanan
- 1Department of Internal Medicine, Washington University, St. Louis, Missouri; 2Adult Leukemia Program, Dana-Farber Cancer Institute, Boston, Massachusetts; 3Department of Internal Medicine and Department of Hematology/Oncology, University of Michigan Health System, Ann Arbor, Michigan
| | - Irene Ryan
- 1Department of Internal Medicine, Washington University, St. Louis, Missouri; 2Adult Leukemia Program, Dana-Farber Cancer Institute, Boston, Massachusetts; 3Department of Internal Medicine and Department of Hematology/Oncology, University of Michigan Health System, Ann Arbor, Michigan
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Buchanan S, Stapleton G, Friedman L, Loy G, Bashook P. Promoting healthy fish consumption to reduce perinatal exposure to mercury. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Buchanan S, Anglen J, Turyk M. Methyl mercury exposure in populations at risk: Analysis of NHANES 2011-2012. Environ Res 2015; 140:56-64. [PMID: 25825131 DOI: 10.1016/j.envres.2015.03.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 03/02/2015] [Accepted: 03/09/2015] [Indexed: 05/27/2023]
Abstract
BACKGROUND Ingestion of fish contaminated with methyl mercury can lead to adverse health outcomes, particularly when exposure occurs in utero. NHANES 2011-2012 includes total blood mercury (TBHg) and methyl mercury (MeHg) measurements as well as a unique race/ethnicity category for Asians, allowing for improved analysis of determinants of risk. OBJECTIVE Our objective was to characterize the current burden of MeHg exposure in the US among subgroups who are at risk of health effects due to their physiologic vulnerability to MeHg's effects and/or due to frequent fish consumption, specifically women of childbearing age (WCBA) and adults ≥50 years of age. METHODS We calculated 90th and 95th percentile estimates as well as geometric means of MeHg for predictive variables. We used multivariable linear regression analyses to estimate the proportional change in mean MeHg associated with each category of all predictive variables. We calculated the validity of screening procedures using fish consumption questions and TBHg testing to predict elevated MeHg. RESULTS The geometric mean MeHg levels were highest among Asian WCBA (1.17 µg/L) and Asians ≥50 years old (2.49 µg/L). Over 23% of Asian WCBA had levels ≥3.5 µg/L and 25% of Asians ≥50 years old had levels ≥5.8 µg/L. Frequency of fish consumption explained 21-23% of the variation in MeHg. Twenty-five percent of women eating fish ≥ twice per week had MeHg ≥3.5 µg/L. TBHg showed high validity for MeHg ≥5.8 µg/L, and two-step screening using ≥2 fish meals/month followed by TBHg also showed high validity. CONCLUSION Asian WCBA continue to have increased MeHg exposure from fish consumption, putting their offspring at risk. Screening for MeHg among high-risk groups should be considered.
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Affiliation(s)
- Susan Buchanan
- Division of Environmental and Occupational Health Sciences, University of Illinois at Chicago School of Public Health, 835 S. Wolcott, MC 684, Suite E-144, Chicago, IL 60612, USA.
| | - Julia Anglen
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago School of Public Health, 1603 W. Taylor St., Chicago, IL 60612, USA
| | - Mary Turyk
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago School of Public Health, 1603 W. Taylor St., Chicago, IL 60612, USA
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Choi B, Abeykoon A, Chao CC, Wang G, Gucek M, Ching WM, Chock PB, Buchanan S, Yang DCH. Expression and Purification of Rickettsial Outer Membrane Protein B. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.714.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bok‐Eum Choi
- Department of ChemistryGeorgetown UniversityWashington, DCUnited States
| | - A Abeykoon
- Laboratory of Molecular Biology NIDDKBethesdaMDUnited States
| | - C C Chao
- Viral and Rickettsial Diseases Department NMRCSilver SpringMDUnited States
| | - G. Wang
- Proteomics Core FacilityNHLBIBethesdaMDUnited States
| | - M. Gucek
- Proteomics Core FacilityNHLBIBethesdaMDUnited States
| | - W M. Ching
- Viral and Rickettsial Diseases Department NMRCSilver SpringMDUnited States
| | - P B. Chock
- Laboratory of Biochemistry NHLBIBethesdaMDUnited States
| | - S. Buchanan
- Laboratory of Molecular Biology NIDDKBethesdaMDUnited States
| | - D C H. Yang
- Department of ChemistryGeorgetown UniversityWashington, DCUnited States
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Kuszak A, Jacobs D, Gurnev P, Lithgow T, Bezrukov S, Rostovtseva T, Buchanan S. Evidence of Distinct Channel Conformations for the Mitochondrial Outer Membrane Translocase Tom40. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.777.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Adam Kuszak
- Laboratory of Molecular Biology NIDDKNational Institutes of HealthBethesdaMDUnited States
| | - Daniel Jacobs
- Laboratory of Molecular Biology NIDDKNational Institutes of HealthBethesdaMDUnited States
- Program in Physical Biology NICHDNational Institutes of HealthBethesdaMDUnited States
| | - Philip Gurnev
- Program in Physical Biology NICHDNational Institutes of HealthBethesdaMDUnited States
- Physics Department University of Massachusetts, AmherstAmherstMAUnited States
| | | | - Sergey Bezrukov
- Program in Physical Biology NICHDNational Institutes of HealthBethesdaMDUnited States
| | - Tatiana Rostovtseva
- Program in Physical Biology NICHDNational Institutes of HealthBethesdaMDUnited States
| | - Susan Buchanan
- Laboratory of Molecular Biology NIDDKNational Institutes of HealthBethesdaMDUnited States
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Pantev C, Gallen C, Hampson S, Buchanan S, Sobel D. Reproducibility and Validity of Neuromagnetic Source Localization Using A Large Array Biomagnetometer. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/00029238.1991.11080360] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- C. Pantev
- Biomagnetic Technologies Inc. (Visiting Scientist)
| | - C. Gallen
- Department of Neuropharmacology, Scripps Clinic and Research Foundation
| | - S. Hampson
- Department of Neuropharmacology, Scripps Clinic and Research Foundation
| | | | - D. Sobel
- Department of Radiology, Scripps Clinic and Research Foundation
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Buchanan S, Gong X, Lallena M, Chio L, Merzoug F, Dempsey J, Beckman R, Reinhard C. 507 Amplification of D-type cyclin genes CCND2 and CCND3 confers an oncogene addiction phenotype in tumor cells and hypersensitivity to the CDK4/6 inhibitor LY2835219. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70633-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Noinaj N, Kuszak A, Balusek C, Gumbart JC, Lukacik P, Chang H, Easley N, Lithgow T, Buchanan S. The role of BamA in the biogenesis of beta-barrel membrane proteins. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314094212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Beta-barrel membrane proteins are essential for nutrient import, signaling, motility, and survival. In Gram-negative bacteria, the beta-barrel assembly machinery (BAM) complex is responsible for the biogenesis of beta-barrel outer membrane proteins (OMPs), with homologous complexes found in mitochondria and chloroplasts. Despite their essential roles, exactly how these OMPs are formed remains unknown. The BAM complex consists of a central and essential component called BamA (an OMP itself) and four lipoproteins called BamB-E. While the structure of the lipoproteins have been reported, the structure of full length BamA has been elusive. Recently though, we described the structure of BamA from two species of bacteria: Neisseria gonorrhoeae and Haemophilus ducreyi. BamA consists of a large periplasmic domain attached to a 16-strand transmembrane beta-barrel domain. Together, our crystal structures and molecule dynamics (MD) simulations revealed several structural features which gave clues to the mechanism by which BamA catalyzes beta-barrel assembly. The first is that the interior cavity is accessible in one BamA structure and conformationally closed in the other. Second, an exterior rim of the beta-barrel has a distinctly narrowed hydrophobic surface, locally destabilizing the outer membrane. Third, the beta-barrel can undergo lateral opening, suggesting a route from the interior cavity in BamA into the outer membrane. And fourth, a surface exposed exit pore positioned above the lateral opening site which may play a role in the biogenesis of extracellular loops. In this presentation, the crystal structures and MD simulations of BamA will be presented along with our work looking at the role of these four structural features in the role of BamA within the BAM complex.
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Abstract
With the introduction of tyrosine kinase inhibitor (TKI) therapy for chronic myeloid leukemia, the course of the disease has been altered from an acute, rapidly progressive terminal disorder to a serious condition with high remission rates when patients are compliant with long-term treatment. The goal of therapy is to prevent transformation to the accelerated or blast crisis phases, which are associated with poor survival. Knowledge of the appropriate monitoring tests and treatment milestones, as well as the ability to interpret responses, allows advanced practitioners (APs) to effectively communicate key aspects of management to their patients. Monitoring patient responses to TKIs and identifying suboptimal responses early on offer APs the opportunity to reevaluate and adjust therapeutic treatment options. One of the causes of treatment failure is noncompliance; thus, educating patients on the importance of adhering to treatment and identifying reasons for noncompliance are of major importance. Because intolerance to TKIs may lead to discontinuation, frequent monitoring of side effects and response to treatment, open communication, patient education, and careful management are all essential in helping patients remain compliant with therapy. This review discusses the AP's role in helping patients achieve their best response to TKI therapy and optimize their long-term outcomes.
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Sathyanarayana S, Focareta J, Dailey T, Buchanan S. Environmental exposures: how to counsel preconception and prenatal patients in the clinical setting. Am J Obstet Gynecol 2012; 207:463-70. [PMID: 22440197 DOI: 10.1016/j.ajog.2012.02.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [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: 12/05/2011] [Revised: 02/01/2012] [Accepted: 02/13/2012] [Indexed: 11/15/2022]
Abstract
A growing body of scientific evidence suggests that preconception and prenatal exposures can impact fetal development adversely and lead to potential long-lasting health effects. Reproductive health professionals have little training on these exposures and how to counsel patients effectively. We present short summaries of some of the most common environmental exposures and give providers practical tools with which to counsel patients in the clinical setting. These tools may enable practitioners to help prevent harmful environmental exposures and to reduce the risk of future adverse health impacts for the prenatal and preconception patient population.
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Affiliation(s)
- Sheela Sathyanarayana
- Department of Pediatrics, Seattle Children's Research Institute, University of Washington, Seattle, WA, USA.
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Ulhaq A, McMahon AD, Buchanan S, Goold S, Conway DI. Socioeconomic deprivation and NHS orthodontic treatment delivery in Scotland. Br Dent J 2012; 213:E5. [DOI: 10.1038/sj.bdj.2012.724] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2012] [Indexed: 11/09/2022]
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Abstract
BACKGROUND Occupational injury rates among day laborers have been estimated to be as high as 31%, where lack of personal protective equipment (PPE) use is repeatedly noted as a contributor to occupational injuries. METHODS We distributed duffel bags containing nine pieces of PPE and provided training on their use to Chicago day laborers during six distribution sessions over two summers. Participants were contacted 4-8 weeks post-distribution and queried on PPE use. RESULTS Of 117 participants who received the equipment, 42 completed the follow-up survey. Workers performed construction, demolition, and painting type tasks and most often used gloves, safety glasses, and respirators. Hardhats, coveralls, and earplugs were the least used. CONCLUSIONS The PPE we provided was used during 94% of the jobs, and every one of the nine items was used. Hearing protection was underused. This project showed that providing PPE, along with training on its use, may increase PPE use among Chicago day laborers, likely preventing occupational injuries.
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Affiliation(s)
- Elizabeth Contreras
- Division of Environmental and Occupational Health Sciences, University of Illinois at Chicago School of Public Health, 2121 West Taylor Street, Chicago, IL 60607, USA
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Basu N, Abare M, Buchanan S, Cryderman D, Nam DH, Sirkin S, Schmitt S, Hu H. A combined ecological and epidemiologic investigation of metal exposures amongst Indigenous peoples near the Marlin Mine in Western Guatemala. Sci Total Environ 2010; 409:70-7. [PMID: 20952048 PMCID: PMC4761224 DOI: 10.1016/j.scitotenv.2010.09.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 09/23/2010] [Accepted: 09/24/2010] [Indexed: 05/04/2023]
Abstract
In August 2009 a combined epidemiological and ecological pilot study was conducted to investigate allegations of human rights abuses in the form of exposures to toxic metals experienced by mine workers and Indigenous Mam Mayan near the Marlin Mine in Guatemala. In the human study there were no differences in blood and urine metals when comparing five mine workers with eighteen non-mine workers, and there were no discernible relationships between metal exposures and self-reported health measures in any study group. On the other hand, individuals residing closest to the mine had significantly higher levels of certain metals (urinary mercury, copper, arsenic, and zinc) when compared to those living further away. The levels of blood aluminum, manganese, and cobalt were elevated in comparison to established normal ranges in many individuals; however, there was no apparent relationship to proximity to the mine or occupation, and thus are of unclear significance. In the ecological study, several metals (aluminum, manganese, and cobalt) were found significantly elevated in the river water and sediment sites directly below the mine when compared to sites elsewhere. When the human and ecological results are combined, they suggest that exposures to certain metals may be elevated in sites near the mine but it is not clear if the current magnitude of these elevations poses a significant threat to health. The authors conclude that more robust studies are needed while parallel efforts to minimize the ecological and human impacts of mining proceed. This is critical particularly as the impact of the exposures found could be greatly magnified by expected increases in mining activity over time, synergistic toxicity between metals, and susceptibility for the young and those with pre-existing disease.
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Affiliation(s)
- Niladri Basu
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, United States.
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Abstract
The mercury sphygmomanometer was introduced over 100 years ago. Mercury, however, is a potent human neurotoxin. An international effort has developed to eliminate health-care sources of mercury--the thermometer and sphygmomanometer--and replace them with less toxic alternatives. There is concern regarding the accuracy of these alternative devices. We conducted a literature review of articles published between 1995 and 2009 evaluating the accuracy of mercury, aneroid, and oscillometric blood pressure devices. Mercury sphygmomanometers fared the best although they do not always perform as expected, failing calibration tests between 1 and 28 per cent of the time. Up to 61 per cent of aneroid sphygmomanometers failed. Recently calibrated aneroid devices performed well. Oscillometric devices were less studied and their performance was variable. All three devices showed variable performance. They should be validated before purchase and calibrated on a regular basis.
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Affiliation(s)
- Susan Buchanan
- Environmental and Occupational Health Sciences Division, University of Illinois at Chicago School of Public Health, 835 S. Wolcott, Suite E-144, MC 684, Chicago, Illinois 60612, USA.
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Marconi PM, Patel K, Thimothy L, Buchanan S, Liptay MJ, Coon J, Bonomi P, Borgia JA. Modulation of the epithelial-to-mesenchymal-like transition by BMP7 and TGF-β in non-small cell lung cancer cell lines in vitro. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e21016] [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: 11/20/2022] Open
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Buchanan S, Vossenas P, Krause N, Moriarty J, Frumin E, Shimek JAM, Mirer F, Orris P, Punnett L. Occupational injury disparities in the US hotel industry. Am J Ind Med 2010; 53:116-25. [PMID: 19593788 DOI: 10.1002/ajim.20724] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [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: 11/11/2022]
Abstract
BACKGROUND Hotel employees have higher rates of occupational injury and sustain more severe injuries than most other service workers. METHOD OSHA log incidents from five unionized hotel companies for a three-year period were analyzed to estimate injury rates by job, company, and demographic characteristics. Room cleaning work, known to be physically hazardous, was of particular concern. RESULTS A total of 2,865 injuries were reported during 55,327 worker-years of observation. The overall injury rate was 5.2 injuries per 100 worker-years. The rate was highest for housekeepers (7.9), Hispanic housekeepers (10.6), and about double in three companies versus two others. Acute trauma rates were highest in kitchen workers (4.0/100) and housekeepers (3.9/100); housekeepers also had the highest rate of musculoskeletal disorders (3.2/100). Age, being female or Hispanic, job title, and company were all independently associated with injury risk. CONCLUSION Sex- and ethnicity-based disparities in injury rates were only partially due to the type of job held and the company in which the work was performed.
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Affiliation(s)
- Susan Buchanan
- Division of Environmental and Occupational Health Sciences, University of Illinois at Chicago School of Public Health, Chicago, Illinois, USA.
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Abstract
This article reviews the sources of exposure and health effects of common toxicants encountered by patients in primary care practice. The recognition and management of exposure to indoor and outdoor pollutants, heavy metals, pesticides, electromagnetic fields, and endocrine-disrupting chemicals are listed. A sample environmental history form is included.
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Affiliation(s)
- Howard Chey
- Division of Environmental and Occupational Health Sciences, University of Illinois at Chicago School of Public Health, 835 South Wolcott, MC 684, Chicago, IL 60612, USA
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Udho E, Jakes K, Buchanan S, James KJ, Coulton JW, Finkelstein A. Reconstitution Of Tonb-dependent Transporters In Planar Lipid Bilayers. Biophys J 2009. [DOI: 10.1016/j.bpj.2008.12.2758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Abstract
Despite its importance, accurate representation of the spatial distribution of water table depth remains one of the greatest deficiencies in many hydrological investigations. Historically, both inverse distance weighting (IDW) and ordinary kriging (OK) have been used to interpolate depths. These methods, however, have major limitations: namely they require large numbers of measurements to represent the spatial variability of water table depth and they do not represent the variation between measurement points. We address this issue by assessing the benefits of using stepwise multiple linear regression (MLR) with three different ancillary data sets to predict the water table depth at 100-m intervals. The ancillary data sets used are Electromagnetic (EM34 and EM38), gamma radiometric: potassium (K), uranium (eU), thorium (eTh), total count (TC), and morphometric data. Results show that MLR offers significant precision and accuracy benefits over OK and IDW. Inclusion of the morphometric data set yielded the greatest (16%) improvement in prediction accuracy compared with IDW, followed by the electromagnetic data set (5%). Use of the gamma radiometric data set showed no improvement. The greatest improvement, however, resulted when all data sets were combined (37% increase in prediction accuracy over IDW). Significantly, however, the use of MLR also allows for prediction in variations in water table depth between measurement points, which is crucial for land management.
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Affiliation(s)
- S Buchanan
- School of Biological, Earth and Environmental Sciences, University of New South Wales, NSW 2052 Australia.
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Buchanan S, Le Ru EC, Etchegoin PG. Plasmon-dispersion corrections and constraints for surface selection rules of single molecule SERS spectra. Phys Chem Chem Phys 2009; 11:7406-11. [DOI: 10.1039/b905846j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [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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Papanicolaou AC, Pazo-Alvarez P, Castillo EM, Billingsley-Marshall RL, Breier JI, Swank PR, Buchanan S, McManis M, Clear T, Passaro AD. Functional neuroimaging with MEG: normative language profiles. Neuroimage 2006; 33:326-42. [PMID: 16887368 DOI: 10.1016/j.neuroimage.2006.06.020] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2006] [Revised: 06/01/2006] [Accepted: 06/18/2006] [Indexed: 11/16/2022] Open
Abstract
The reliability of language-specific brain activation profiles was assessed using Magnetoencephalography (MEG) in five experiments involving ninety-seven normal volunteers of both genders ranging in age from seven to eighty-four years. MEG data were analyzed with a fully automated method to eliminate subjective judgments in the process of deriving the activation profiles. Across all experiments, profiles were characterized by significant bilateral activity centered in the superior temporal gyrus, and in activity lateralized to the left middle temporal gyrus. These features were invariant across age, gender, variation in task characteristics, and mode of stimulus presentation. The absolute amount of activation, however, did decline with age in the auditory tasks. Moreover, contrary to the commonly held belief that left hemisphere dominance for language is greater in men than in women, our data revealed an opposite albeit a not consistently significant trend.
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Affiliation(s)
- A C Papanicolaou
- Department of Neurosurgery, Division of Clinical Neuroscience, University of Texas, Health Science Center, Houston, 1333 Moursund Street, Suite H114, 77030, USA.
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Buchanan S, Krantz A, Klempner S, Alvarado R, Wesseling C, Fernández E, Forst L. Use of a national reporting system for occupational injuries in Costa Rica. Int J Occup Environ Health 2006; 12:142-6. [PMID: 16722194 DOI: 10.1179/oeh.2006.12.2.142] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Occupational injury surveillance in developing countries may be hindered by the lack of health data infrastructure as well the large numbers of informal-sector workers. The goal of this study was to elucidate the scope of occupational injury in the Monteverde district of Costa Rica using data collected through the national workers social security system. A list of occupational injuries occurring in the district reported to the National Insurance Institute (INS) central office between 1998 and 2002 was taken to the regional INS office, and the original injury reports for the cases were pulled. Specific data on the injuries were collected. There were 184 injuries reported during the five year period. Occupations with the highest number of injuries included production, building and grounds maintenance, and agricultural/forestry/fishing. Descriptive data showed that prevention efforts in this rural region should target food manufacturing, hotels, and construction.
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Affiliation(s)
- Susan Buchanan
- University of Illinois at Chicago Department of Occupational Medicine, Chicago, Illinois 60612, USA.
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O'Rourke N, Buchanan S. O-181 Developing a strategy to increase lung cancer resection rates. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80315-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Buchanan S, McPhelim J, McCabe M, Webster L, Thain A, Williams S, O'Rourke N. P-811 Assessing and addressing lung cancer patient information needs. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)81304-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
The term "day labor" refers to work performed by individuals who are hired on a temporary basis, often for one day at a time. This type of employment has increased in North America as informal work arrangements and immigration have increased. Research on the occupational health of day laborers is minimal. The objectives of this article are to review the current literature pertaining to occupational health in day laborers, and to characterize the issues that affect this population's access to occupational health services. Surveys of day laborers and other immigrant, low-wage workers show that they are at elevated risk for occupational injury and are often unable to access medical care when injured on the job. Reasons include workers' reluctance to complain about unsafe work conditions, inadequate safety training, and lack of incentive for employers to reduce workplace injuries. More research is needed to better characterize the occupational health of this population.
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Affiliation(s)
- Susan Buchanan
- Department of Occupational Medicine, University of Illinois, Chicago College of Medicine, IL 60612, USA
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Abstract
The collection of peripheral blood progenitor cells (PBPC) by apheresis has become common in related allogeneic donors. However, the acceptability of the procedure to donors has not been documented. The purpose of this baseline case series study was to evaluate the psycho-social dimensions of apheresis from the perspective of healthy sibling donors and to explore issues surrounding fully informed consent including voluntary donation. At the first interview to discuss donation, 17 consecutive human leucocyte antigens (HLA) identical sibling donors who chose to donate PBPC were recruited to the study. They then completed both scales of the State-Trait Anxiety Inventory. The state scale was completed again immediately before first apheresis. At the end of the final apheresis, the donors were interviewed again by an independent researcher using a standardised questionnaire. All aspects of the procedure were well tolerated, including levels of anxiety and pain. Donors donated even if the relationship with their sibling was poor. However, some areas for improvement were highlighted. Eight (47%) donors were asked to donate by their sibling or another close relative, and this gave them no real volunteer status. Written information was judged important by 11 (65%) donors, but the material used was limited. The possibility of a poor outcome for the recipient was not well understood. The content of the written documentation and the management of confidentiality in terms of donor volunteer status needed to be addressed. A further study regarding the follow-up needs of donors, including those where the outcome is poor, is underway.
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Affiliation(s)
- Susan Williams
- Glasgow Caledonian University and Greater Glasgow Health Board, Glasgow, United Kingdom
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Buchanan S, Robertson GW, Hocking PM. Comparative changes in plasma concentrations of progesterone, oestradiol and LH during the ovulatory cycle in a multiple ovulating male line and a single ovulating traditional line of turkeys. Reproduction 2002. [DOI: 10.1530/rep.0.1230127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this study was to compare the profile of circulating concentrations of LH, progesterone and oestradiol in a multiple ovulating male line with that of a single ovulating line of traditional turkeys. Plasma samples from seven traditional and 12 male-line turkeys were obtained every 3 h for 36 h. Male-line and traditional turkeys had single peaks of LH and progesterone that were of similar duration in both lines. The mean height of the plasma peaks of LH and progesterone were similar in the two lines and there was no detectable peak plasma oestrogen concentration. Mean plasma concentrations of LH and oestrogen were higher in single compared with multiple ovulating turkeys, whereas there were no differences in mean plasma progesterone concentrations. The results indicate that the multiple ovulation state in genetically selected high-growth lines of turkey may be the result of a correlated response in the steroidogenic capacity of ovarian tissue associated with low plasma concentrations of oestrogen rather than of a disturbance in the hormone profile of the ovulatory cycle.
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Buchanan S, Robertson GW, Hocking PM. Comparative changes in plasma concentrations of progesterone, oestradiol and LH during the ovulatory cycle in a multiple ovulating male line and a single ovulating traditional line of turkeys. Reproduction 2002; 123:127-33. [PMID: 11869194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The aim of this study was to compare the profile of circulating concentrations of LH, progesterone and oestradiol in a multiple ovulating male line with that of a single ovulating line of traditional turkeys. Plasma samples from seven traditional and 12 male-line turkeys were obtained every 3 h for 36 h. Male-line and traditional turkeys had single peaks of LH and progesterone that were of similar duration in both lines. The mean height of the plasma peaks of LH and progesterone were similar in the two lines and there was no detectable peak plasma oestrogen concentration. Mean plasma concentrations of LH and oestrogen were higher in single compared with multiple ovulating turkeys, whereas there were no differences in mean plasma progesterone concentrations. The results indicate that the multiple ovulation state in genetically selected high-growth lines of turkey may be the result of a correlated response in the steroidogenic capacity of ovarian tissue associated with low plasma concentrations of oestrogen rather than of a disturbance in the hormone profile of the ovulatory cycle.
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Affiliation(s)
- S Buchanan
- Roslin Institute, Roslin, Midlothian EH25 9PS, UK
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Braun H, Michel-Beyerle M, Breton J, Buchanan S, Michel H. Electric field effect on absorption spectra of reaction centers ofRb. sphaeroidesandRps. viridis. FEBS Lett 2001. [DOI: 10.1016/0014-5793(87)80929-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Slipetz D, Buchanan S, Mackereth C, Brewer N, Pellow V, Hao C, Adam M, Abramovitz M, Metters KM. Sequestration and phosphorylation of the prostaglandin E2 EP4 receptor: dependence on the C-terminal tail. Biochem Pharmacol 2001; 62:997-1012. [PMID: 11597569 DOI: 10.1016/s0006-2952(01)00742-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/16/2022]
Abstract
The prostaglandin E2 (PGE2) EP4 subtype is one of four prostanoid receptors that use PGE2 as the preferred ligand. We have investigated the agonist-mediated regulation of EP4 using a multifaceted approach. Short-term (30 min) agonist challenge of recombinant EP4 expressed in human embryonic kidney 293 cells (EP4-HEK293 cells) with PGE2 (1 microM) resulted in the desensitization of intracellular cyclic AMP (cAMP) accumulation and a reduction in cell surface [3H]PGE2 specific binding sites. These events correlated with sequestration of EP4, as visualized by immunofluorescence confocal microscopy and phosphorylation, as shown by [32P]orthophosphate labeling of the receptor. Stimulation of protein kinase A activity in EP4-HEK293 cells (10 microM forskolin or 1 mM 8-bromo-cAMP) did not induce EP4 desensitization, sequestration, or phosphorylation. In contrast, stimulation of protein kinase C activity (100 nM phorbol 12-myristate 13-acetate) attenuated PGE2-induced adenylyl cyclase activity and increased EP4 phosphorylation, but did not induce sequestration or a reduction in [3H]PGE2 specific binding sites. EP4 receptors containing a third intracellular loop deletion [EP4 (del. 215-263)] or a carboxyl-terminal tail truncation [EP4 (del. 355)] of EP4 were used to demonstrate that the C-terminal tail governs sequestration as well as phosphorylation of the receptor.
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Affiliation(s)
- D Slipetz
- Department of Biochemistry and Molecular Biology, Merck Frosst Centre for Therapeutic Research, 16711 Transcanada Hwy, H9H-3L1, Kirkland, Quebec, Canada.
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Morrison AE, Watson D, Buchanan S, Green RH. Prospective randomised concurrent comparison of the COBE spectra version 4.7, COBE spectra version 6 (Auto PBSCtrade mark), and haemonetics MCS+ cell separators for leucapheresis in patients with haematological and non haematological malignancies. J Clin Apher 2001; 15:224-9. [PMID: 11124689 DOI: 10.1002/1098-1101(2000)15:4<224::aid-jca2>3.0.co;2-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/06/2022]
Abstract
A prospective study of three cell separators was undertaken to compare the mononuclear cell, CD34+ cell and CFU-GM yield. Twenty patients were entered in the study; all had received chemotherapy and daily G-CSF (5 microg/kg subcutaneously) up to and including the first day of leucapheresis. The first leucapheresis was performed on the first day the peripheral blood absolute CD34+ cell count was > or =20 cells/microl. All patients underwent two leucaphereses on consecutive days. The patients were randomised to undergo either the first or second leucapheresis using the COBE Spectra Version 4.7 and then randomised to either the COBE Spectra Version 6 or Haemonetics MCS+ for the other leucapheresis. The target durations of the procedure on the COBE Spectra Version 4.7 and Version 6 were 180 minutes or 2 total blood volumes (TBV), and for the Haemonetics MCS+ was 20 cycles with four recirculations. All machines were operated on the 1997 software supplied by the respective manufacturers. The time taken for the procedure was significantly longer with both the Haemonetics MCS+ and the COBE Spectra Version 6 than the COBE Spectra Version 4.7. Both COBE Spectra versions processed significantly larger volumes of blood than the Haemonetics MCS+. The absolute yield of mononuclear cells, CFU-GM and CD34+ cells were all significantly lower with the Haemonetics MCS+ compared with both COBE Spectra versions, as were the yields per unit volume of blood processed. The product volume was significantly higher with the COBE Spectra Version 4.7 compared to the other two machines. There was no significant difference in the reduction in the platelet count following leucapheresis with any of the machines. The COBE Spectra Version 6 is particularly useful for patients with potentially poor peripheral venous access because of its increased interface stability.
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Affiliation(s)
- A E Morrison
- Clinical Apheresis Unit, Glasgow Royal Infirmary, Glasgow, Scotland
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Buchanan S, Robertson GW, Hocking PM. Ovarian steroid hormone production in a multiple ovulating male line and a single ovulating traditional line of turkeys. Reproduction 2001. [DOI: 10.1530/rep.0.1210277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Ovarian production of oestradiol and progesterone was investigated in a single ovulating traditional line and a multiple ovulating male line of turkeys. The oestradiol output from small follicles in response to LH stimulation and the aromatase activity of the residual ovary were also compared. The multiple hierarchy of follicles in the male line was shown to consist of a series of follicles of a similar size and stage of physiological maturation. The follicles of the traditional line produced significantly greater quantities of oestradiol than those of the male line. Impaired oestradiol production may have resulted in the lower plasma oestradiol concentration observed in the male line. There was no difference in follicular progesterone output between the traditional-line and male-line turkeys. The oestradiol output of whole small white follicles in response to LH stimulation was similar in the two lines and the depressed steroidogenesis of the male line was not changed. The aromatase activity of the small follicles was also lower in the male line, and there was no evidence that the male line ovary produced oestradiol in quantities proportional to its size. The results demonstrated that the hierarchy of follicles in the male line consisted of groups of follicles of similar mass and hormone output and indicated that selection for increased meat yield may have resulted in reduced ovarian steroidogenesis in male-line turkeys, in comparison with traditional, unselected turkeys.
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Buchanan S, Robertson GW, Hocking PM. Ovarian steroid hormone production in a multiple ovulating male line and a single ovulating traditional line of turkeys. Reproduction 2001; 121:277-85. [PMID: 11226052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Ovarian production of oestradiol and progesterone was investigated in a single ovulating traditional line and a multiple ovulating male line of turkeys. The oestradiol output from small follicles in response to LH stimulation and the aromatase activity of the residual ovary were also compared. The multiple hierarchy of follicles in the male line was shown to consist of a series of follicles of a similar size and stage of physiological maturation. The follicles of the traditional line produced significantly greater quantities of oestradiol than those of the male line. Impaired oestradiol production may have resulted in the lower plasma oestradiol concentration observed in the male line. There was no difference in follicular progesterone output between the traditional-line and male-line turkeys. The oestradiol output of whole small white follicles in response to LH stimulation was similar in the two lines and the depressed steroidogenesis of the male line was not changed. The aromatase activity of the small follicles was also lower in the male line, and there was no evidence that the male line ovary produced oestradiol in quantities proportional to its size. The results demonstrated that the hierarchy of follicles in the male line consisted of groups of follicles of similar mass and hormone output and indicated that selection for increased meat yield may have resulted in reduced ovarian steroidogenesis in male-line turkeys, in comparison with traditional, unselected turkeys.
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Affiliation(s)
- S Buchanan
- Roslin Institute, Roslin, Midlothian EH25 9PS, UK
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