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Oluloro A, Comstock B, Monsell SE, Gross M, Wolff EM, Sage L, Alson J, Lavallee DC, Hempstead B, Moore A, Katz R, Doll KM. Study Protocol for the Social Interventions for Support During Treatment for Endometrial Cancer and Recurrence (SISTER) study: a community engaged national randomized trial. J Comp Eff Res 2024; 13:e230159. [PMID: 38348827 PMCID: PMC10945416 DOI: 10.57264/cer-2023-0159] [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: 10/19/2023] [Accepted: 01/17/2024] [Indexed: 03/02/2024] Open
Abstract
Aim: Social isolation in cancer patients is correlated with prognosis and is a potential mediator of treatment completion. Black women with endometrial cancer (EC) are at increased risk for social isolation when compared with White patients. We developed the Social Interventions for Support during Treatment for Endometrial Cancer and Recurrence (SISTER) study to compare and evaluate interventions to address social isolation among Black women with high-risk EC in USA. The primary objective of the SISTER study is to determine whether virtual support interventions improve treatment completion compared with Enhanced Usual Care. Secondary objectives include comparing effectiveness virtual evidence-based interventions and evaluating barriers and facilitators to social support delivery. Patients & methods: This is a multi-site prospective, open-label, community-engaged randomized controlled trial, consisting of three intervention arms: enhanced usual care, facilitated support group and one-to-one peer support. Primary outcome will be measured using relative dose. Qualitative semi-structured interviews will be conducted with a subset of participants to contextualize the relative degree or lack thereof of social isolation, over time. Data analysis: Primary analysis will be based on an intent-to-treat analysis. Multivariable analysis will be performed to determine the effect of the intervention on the primary and secondary outcomes of interest, relative dose and social isolation score. Semi-structured interviews will be qualitatively analyzed using inductive and deductive approaches of content analysis. Discussion/conclusion: Endometrial cancer mortality disproportionately affects Black women, and social isolation contributes to this disparity. The SISTER study aims to identify whether and to what extent differing social support vehicles improve key outcomes for Black women in the United States with high-risk EC. Clinical Trial Registration: NCT04930159 (ClinicalTrials.gov).
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Affiliation(s)
- Ann Oluloro
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | - Bryan Comstock
- University of Washington, Center for Biomedical Statistics, Seattle, WA 98195, USA
| | - Sarah E Monsell
- University of Washington, Center for Biomedical Statistics, Seattle, WA 98195, USA
| | - Maya Gross
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | - Erika M Wolff
- Department of Urology, University of Washington, Seattle, WA 98195, USA
| | - Liz Sage
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | - Julianna Alson
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | | | | | - Adrienne Moore
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | - Ronit Katz
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
| | - Kemi M Doll
- Department of Obstetrics & Gynecology, Fred Hutchinson Cancer Center, University of Washington, Seattle, WA 98195, USA
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Sage L, Dwyer E, Gray DA, Oluloro A, Williams PA, Katz R, Qualls NJ, Doll KM. Endometrial Cancer Knowledge and Guideline-Concordant Practice Patterns Among First-Line Providers. J Womens Health (Larchmt) 2023; 32:1104-1110. [PMID: 37527205 DOI: 10.1089/jwh.2022.0534] [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] [Indexed: 08/03/2023] Open
Abstract
Background: Provider uncertainty about the appropriate guideline-concordant evaluation of endometrial cancer (EC) symptoms may be a factor in racial inequities in EC. To evaluate the relationship between EC knowledge and reported practice patterns in a nationally representative survey of first-line providers for initial EC symptoms. Materials and Methods: This was a mailed cross-sectional survey of physicians and nurse practitioners from professional organization roster of providers from Obstetrics and Gynecology (OBGYN), Family Medicine, Internal Medicine, and Emergency Medicine. It queried demographics, practice characteristics, EC knowledge, and guideline-concordant practice patterns via three case vignettes. Regions of low response were retargeted to ensure strong representation among providers caring for Black women patients. EC knowledge was analyzed via a composite score (range: -3 to 10, with higher scores representing more EC knowledge), and adjusted prevalence ratios (PRs) used to test the association between knowledge and reported practice patterns. Results: Among 531 returned surveys (response rate = 38%), OBGYN had highest (53%) frequency of >6 (median) EC knowledge score, and Emergency Medicine had the lowest (15%) (p < 0.001). Nonguideline-concordant practice patterns were reported in 14%, 41%, and 35% of the three EC cases presented. Providers with knowledge >6, (n = 205) were significantly more likely to report guideline-concordant care on case vignettes (PR 1.28-1.36). Conclusions: In a national survey of multi-specialty backgrounds, there were basic knowledge gaps about EC and EC risk factors among providers, and a sizeable proportion reported nonguideline concordant practices. These findings indicate the importance of targeted education and training for first-line providers, as EC incidence rises.
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Affiliation(s)
- Liz Sage
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Erin Dwyer
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Dorender A Gray
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Ann Oluloro
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Patrice A Williams
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Ronit Katz
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Noah J Qualls
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
| | - Kemi M Doll
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA
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Oluloro A, Temkin SM, Jackson J, Swisher EM, Sage L, Doll K. What's in it for me?: A value assessment of gynecologic cancer clinical trials for Black women. Gynecol Oncol 2023; 172:29-35. [PMID: 36931101 PMCID: PMC10192016 DOI: 10.1016/j.ygyno.2023.03.002] [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] [Received: 12/28/2022] [Revised: 03/04/2023] [Accepted: 03/06/2023] [Indexed: 03/17/2023]
Abstract
OBJECTIVE Underrepresented groups may be dissuaded from clinical trial participation without perceived value. We therefore comprehensively assessed gynecologic cancer clinical trial protocols for the inclusion of items of value most important to Black individuals. METHODS ClinicalTrials.gov was queried for NCI-sponsored gynecologic cancer clinical trials in the US between Jan.1994 and Nov.2021. Pre-specified return of value (ROV) items were abstracted from each protocol. Inclusion proportions were calculated for each ROV item and temporal changes assessed with chi-square tests. Temporality of proportional trends was further assessed by slope and departure from linearity calculations. RESULTS 279 gynecologic cancer clinical trials were included. Most commonly trials had first accrual in 2001-2007 (37%) and involved ovarian cancer (48%), phase II studies (53%), and chemotherapy (60%) or targeted therapy (34%). Trials often included ROV items in basic information (99%), medical record information (99%), and imaging (82%). 41% of trials included ROV items in biomarker testing, 20% genetic testing, and 20% in patient-reported outcome questionnaires. Over time, there were significant increases in the proportion of trials that included genetic (3% to 51%; p < 0.001) and biomarker testing (14 to 78%, p < 0.001). Information on lifestyle risk factors was rare (1%). No trials included ROV items in ancestry, how to connect with other participants, or remuneration. CONCLUSIONS Gynecologic cancer clinical trials include few design elements that provide high value to Black individuals like lifestyle risk factors, ancestry, and remuneration. In any multi-pronged effort to improve diversity in clinical trial enrollment, inclusion of items valued by Black individuals should be considered.
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Affiliation(s)
- Ann Oluloro
- University of Washington, 1959 Pacific Street, Box 356460, Seattle, WA 98195, USA.
| | - Sarah M Temkin
- Office of Research on Women's Health, 6707 Democracy Boulevard, Suite 400, Bethesda, MD 20817, USA
| | - Jonathan Jackson
- The CARE Research Center, Massachusetts General Hospital, 50 Staniford Street, Suite 1082, Boston, MA 02114, USA
| | - Elizabeth M Swisher
- University of Washington, 1959 Pacific Street, Box 356460, Seattle, WA 98195, USA
| | - Liz Sage
- University of Washington, 1959 Pacific Street, Box 356460, Seattle, WA 98195, USA
| | - Kemi Doll
- University of Washington, 1959 Pacific Street, Box 356460, Seattle, WA 98195, USA
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Gamble CR, Sage L, Nguyen A, Hempstead BH, Moore A, Wilson M, Doll KM. Social support and resilience in Black women affected by endometrial cancer. Am J Obstet Gynecol 2022; 226:145-149. [PMID: 34481773 DOI: 10.1016/j.ajog.2021.08.041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/02/2021] [Accepted: 08/29/2021] [Indexed: 11/16/2022]
Affiliation(s)
- Charlotte R Gamble
- Endometrial Cancer Action Network for African Americans, Division of Gynecologic Oncology; Department of Obstetrics & Gynecology; Columbia University Irving Medical Center, 161 Fort Washington Ave, Suite 456, New York, NY 10032.
| | - Liz Sage
- Endometrial Cancer Action Network for African Americans; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, WA
| | - Ashley Nguyen
- University of Washington School of Public Health, Seattle, WA
| | - Bridgette H Hempstead
- Endometrial Cancer Action Network for African Americans; Cierra Sisters, Inc, Renton, WA
| | | | - Margie Wilson
- Endometrial Cancer Action Network for African Americans
| | - Kemi M Doll
- Endometrial Cancer Action Network for African Americans; Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, WA
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Alson JG, Nguyen A, Hempstead B, Moore A, Wilson M, Sage L, Cheng G, Doll KM. "We Are a Powerful Movement": Evaluation of an Endometrial Cancer Education Program for Black Women. Prog Community Health Partnersh 2021; 15:e3-e4. [DOI: 10.1353/cpr.2021.0047] [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: 11/11/2022]
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Alson JG, Nguyen A, Hempstead B, Moore A, Wilson M, Sage L, Cheng G, Doll KM. "We Are a Powerful Movement": Evaluation of an Endometrial Cancer Education Program for Black Women. Prog Community Health Partnersh 2021; 15:439-452. [DOI: 10.1353/cpr.2021.0057] [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: 11/11/2022]
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Abstract
IMPORTANCE Black women with endometrial cancer have a 90% higher mortality rate than white women with endometrial cancer. The advanced disease stage at which black women receive a diagnosis of endometrial cancer is a major factor in this disparity and is not explained by differences in health care access. OBJECTIVE To describe the prediagnostic experiences of symptoms and symptom disclosure among black women with endometrial cancer. DESIGN, SETTING, AND PARTICIPANTS This community-engaged qualitative study developed an interview guide to collect data during semistructured interviews among a sample of 15 black women with endometrial cancer in the United States. Interviews were conducted in person or via a secure conferencing platform. An exploratory and descriptive content analysis was performed using iterative rounds of inductive coding, case summaries, and coanalysis with community input to identify emergent themes. Data were collected from October 3, 2017, to April 15, 2019, and the descriptive content analysis was performed from October 11, 2017, to May 6, 2019. MAIN OUTCOMES AND MEASURES Beliefs, interpretations, and experiences of black women with endometrial cancer from symptom onset to diagnostic confirmation of cancer. RESULTS Participants included 15 women who self-identified as black or African American and ranged in age from 31 to 72 years. Eight participants lived in the Puget Sound region of Washington, 2 participants lived in California, and 1 participant each lived in Alabama, Michigan, Louisiana, Georgia, and New York. Twelve participants were receiving adjuvant therapy during the study, which indicated that they were either in a high-risk group and/or had advanced-stage disease. Thirteen participants had health insurance at the time of symptom onset, and all participants had elected to receive cancer treatment. Participants described knowledge gaps and silence about menopause, misinterpretation of vaginal bleeding, and responses by first-line health care practitioners that were not aligned with the risk of endometrial cancer among black women in the United States. CONCLUSIONS AND RELEVANCE The responses of interviewed black women with endometrial cancer suggest that several mechanisms may be associated with a delay in care before diagnosis among this high-risk population and represent modifiable factors that may be useful in the development of targeted interventions to improve the rates of early diagnosis among black women with endometrial cancer.
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Affiliation(s)
- Kemi M. Doll
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle
| | | | - Julianna Alson
- Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle
| | - Liz Sage
- Department of Surgery, University of Washington School of Medicine, Seattle
| | - Danielle Lavallee
- Department of Surgery, University of Washington School of Medicine, Seattle
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Sage L, Russo ML, Byers PH, Demasi J, Morris SA, Puryear LN, Fulton DS, Shalhub S. Setting a research agenda for vascular Ehlers-Danlos syndrome using a patient and stakeholder engagement model. J Vasc Surg 2020; 72:1436-1444.e2. [PMID: 32115322 DOI: 10.1016/j.jvs.2019.12.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 08/29/2019] [Accepted: 12/30/2019] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Vascular Ehlers-Danlos syndrome (vEDS) is a rare, syndromic, heritable condition with life-threatening complications that include aortic and arterial aneurysms, dissection, and rupture. This study describes the formation of the vEDS Research Collaborative and methods used for stakeholder engagement. METHODS The vEDS Research Collaborative was established with an engagement award from the Patient-Centered Outcomes Research Institute to create a framework for a patient-researcher partnership. Between October 1, 2017, and September 30, 2018, the Collaborative used the Patient-Centered Outcomes Research Institute Engagement Rubric to conduct stakeholder engagement to develop a patient-centered research agenda. A modified Delphi technique was used to develop and to refine research topics and questions, gathering input from all stakeholders during three rounds of feedback. RESULTS Four topic areas were deemed important: mental health and quality of life issues, creating a care team, a holistic approach to vEDS management (medical and surgical), and pregnancy management. An online survey to rank a list of 12 research questions in these topic areas in order of importance was disseminated. The questions were ranked in order of importance through an online survey (N = 197 responses). The survey showed a high degree of alignment in the top priorities among stakeholders. There was a high degree of interest in pragmatic clinical trials evaluating medical management options and health-related quality of life outcomes. CONCLUSIONS The vEDS Research Collaborative has built a sustainable, coalition model of patient and stakeholder engagement, supported by the vEDS community, to identify a patient-centered, prioritized list of research questions. In articulating a shared vision for the future of vEDS research, the Collaborative has laid the groundwork for developing research protocols aligned with the highest priority questions for the individuals affected by this serious condition that can be translated into future clinical trials.
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Affiliation(s)
- Liz Sage
- Department of Surgery, University of Washington, Seattle, Wash
| | - Melissa L Russo
- Department of Maternal-Fetal Medicine, Division of Obstetrics and Gynecology, Warren Alpert Medical School at Brown University, Women & Infants Hospital, Providence, RI
| | - Peter H Byers
- Department of Pathology, University of Washington School of Medicine, Seattle, Wash; Department of Medicine, Division of Medical Genetics, University of Washington School of Medicine, Seattle, Wash
| | - John Demasi
- Department of Radiation Oncology, University of Kentucky, Lexington, Ky
| | - Shaine A Morris
- Department of Pediatrics, Section of Cardiology, Baylor College of Medicine and Texas Children's Hospital, Houston, Tex
| | - Lauren N Puryear
- Department of Pathology, University of Washington School of Medicine, Seattle, Wash; Department of Medicine, Division of Medical Genetics, University of Washington School of Medicine, Seattle, Wash
| | - Daphne S Fulton
- Department of Population Health, College of Health Sciences, Sam Houston State University, Huntsville, Tex
| | - Sherene Shalhub
- Department of Surgery, Division of Vascular Surgery, University of Washington School of Medicine, Seattle, Wash.
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Séguin V, Gente S, Heutte N, Vérité P, Kientz-Bouchart V, Sage L, Goux D, Garon D. First report of mycophenolic acid production by Eurotium repens isolated from agricultural and indoor environments. WORLD MYCOTOXIN J 2014. [DOI: 10.3920/wmj2013.1619] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mycophenolic acid is considered as an immunosuppressive pharmaceutical drug, but also as a mycotoxin due to its undesirable presence in various feedstuffs. Although Penicillium brevicompactum has been historically identified as the major producer of mycophenolic acid, this study reports for the first time the production of mycophenolic acid by isolates of Eurotium repens collected from agricultural and indoor environments. Fungal identification was achieved by scanning electron microscopy and molecular techniques, and mycophenolic acid production was confirmed by two analytical methods (gas and liquid chromatography coupled to mass spectrometry). These findings suggest that mycophenolic acid production and immunosuppressive properties of other closely related Eurotium should be evaluated in future studies.
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Affiliation(s)
- V. Séguin
- ABTE EA 4651, Equipe ToxEMAC, Université de Caen Basse-Normandie and Centre François Baclesse, Avenue du Général Harris, 14076 Caen Cedex 05, France
| | - S. Gente
- ABTE EA 4651, Equipe ToxEMAC, Université de Caen Basse-Normandie and Centre François Baclesse, Avenue du Général Harris, 14076 Caen Cedex 05, France
| | - N. Heutte
- INSERM U1086, Université de Caen Basse-Normandie and Centre François Baclesse, Avenue du Général Harris, 14076 Caen Cedex 05, France
| | - P. Vérité
- ABTE EA 4651, Equipe ToxEMAC, Université de Rouen, UFR de Médecine-Pharmacie, Boulevard Gambetta, 76000 Rouen, France
| | - V. Kientz-Bouchart
- Laboratoire Frank Duncombe, Conseil Général du Calvados, 14053 Caen Cedex 04, France
| | - L. Sage
- LECA UMR 5553, Université Joseph Fourier, BP 53, Rue de la Piscine, 38041 Grenoble Cedex 9, France
| | - D. Goux
- Centre de Microscopie Appliquée à la Biologie, Université de Caen Basse-Normandie, , Esplanade de la Paix, 14032 Caen Cedex, France
| | - D. Garon
- ABTE EA 4651, Equipe ToxEMAC, Université de Caen Basse-Normandie and Centre François Baclesse, Avenue du Général Harris, 14076 Caen Cedex 05, France
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Binet M, Sage L, Malan C, Clément J, Redecker D, Wipf D, Geremia R, Lavorel S, Mouhamadou B. Effects of mowing on fungal endophytes and arbuscular mycorrhizal fungi in subalpine grasslands. FUNGAL ECOL 2013. [DOI: 10.1016/j.funeco.2013.04.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [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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Baptist F, Zinger L, Clement JC, Gallet C, Guillemin R, Martins JMF, Sage L, Shahnavaz B, Choler P, Geremia R. Tannin impacts on microbial diversity and the functioning of alpine soils: a multidisciplinary approach. Environ Microbiol 2008; 10:799-809. [DOI: 10.1111/j.1462-2920.2007.01504.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Richard E, Heutte N, Sage L, Pottier D, Bouchart V, Lebailly P, Garon D. Toxigenic fungi and mycotoxins in mature corn silage. Food Chem Toxicol 2007; 45:2420-5. [PMID: 17655998 DOI: 10.1016/j.fct.2007.06.018] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2006] [Revised: 05/29/2007] [Accepted: 06/13/2007] [Indexed: 11/21/2022]
Abstract
To investigate the exposure of livestock and farm workers to mycotoxins during the last months of silage use, the mycoflora and the mycotoxins in a mature silage (11-months-old) were studied. A multimycotoxin method was developed to evaluate the toxigenic in vitro ability of fungal strains. The screening of potentially toxigenic fungi isolated from the mature silage showed that six Fusaria (Fusarium culmorum, Fusarium equiseti, Fusarium graminearum, Fusarium oxysporum, Fusarium solani and Fusarium verticillioides) and one Aspergillus (Aspergillus fumigatus) were able to produce mycotoxins on nutrient agar. Seven major mycotoxins (aflatoxin B(1), citrinin, deoxynivalenol, fumonisin B(1), gliotoxin, ochratoxin A and zearalenone) were also searched in the corn silage by high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS). Among the three mycotoxins (citrinin, gliotoxin and deoxynivalenol) detected in the silage, gliotoxin, a strongly immunosuppressive mycotoxin, occurred in the mature silage at level up to 877 ppb, which was associated with the presence of A. fumigatus in the silage.
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Affiliation(s)
- E Richard
- Groupe Régional d'Etudes sur le Cancer, GRECAN-EA 1772, Université de Caen Basse-Normandie, Centre François Baclesse, Avenue Général Harris, BP 5026, 14076 Caen Cedex 05, France
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Garon D, Sage L, Wouessidjewe D, Seigle-Murandi F. Enhanced degradation of fluorene in soil slurry by Absidia cylindrospora and maltosyl-cyclodextrin. Chemosphere 2004; 56:159-166. [PMID: 15120562 DOI: 10.1016/j.chemosphere.2004.02.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2003] [Revised: 08/04/2003] [Accepted: 02/20/2004] [Indexed: 05/24/2023]
Abstract
This study investigates the fungal biodegradation of fluorene, a polycyclic aromatic hydrocarbon, in liquid medium and soil slurry. Fungal strains and cyclodextrins were used in order to degrade fluorene and optimize fluorene bioavailability and degradation in soil slurries. After a procedure of selection in solid and liquid media, maltosyl-cyclodextrin, a branched cyclodextrin was chosen. 47 fungal strains isolated from a contaminated site were tested for biodegradation. Results showed the greater efficiency of "adapted" fungi isolated from contaminated soil vs reference strains belonging to the collection of the laboratory. These assays allowed us to select the most efficient strain, Absidia cylindrospora, which was used in a bioaugmentation process. Bioaugmentation tests were performed in an artificially contaminated non-sterile soil. In the presence of A. cylindrospora, more than 90% of the fluorene was degraded within 288 h, while 576 h were necessary in the absence of fungal bioremediation. It also appeared that biodegradation was enhanced by amendment with previously selected maltosyl-cyclodextrin. The results of this study indicate that A. cylindrospora and maltosyl-cyclodextrin could be used successfully in fluorene bioremediation systems.
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Affiliation(s)
- D Garon
- Groupe Perturbations Environnementales et Xénobiotiques, Laboratoire d'Ecologie Alpine, UMR CNRS 5553, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France
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Affiliation(s)
- L Sage
- Leslie Sage is Nature's astronomy editor
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Steiman R, Guiraud P, Seigle-Murandi F, Sage L. Exserohilum israeli, a new species isolated from soil from Timna Park (Israel), and its physiological properties. Antonie Van Leeuwenhoek 2000; 78:153-61. [PMID: 11204767 DOI: 10.1023/a:1026561631387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Fungi isolated from soil in Timna Park (Israel) were found to belong to a new species of Exserohilum for which the name Erserohilum israeli sp. nov. is proposed. The main physiological properties of members of this species are discussed and the influence of temperature and copper concentrations on the growth and morphology of the fungus were investigated.
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Affiliation(s)
- R Steiman
- Groupe pour l'Etude du Devenir des Xénobiotiques dans l'Environnement, GEDEXE, UFR Pharmacie, Université Joseph Fourier, Meylan, France
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Abstract
Micromycetes were isolated from PAHS-contaminated sediment and identified. They were investigated for pyrene degradation (10 mg l-1) in liquid synthetic medium for two days. Among the 41 strains isolated, 10 highly degraded pyrene (> 2.4 mg g-1 dry weight): two Zygomycetes (Mucor racemosus, M. racemosus var. sphaerosporus), 6 Deuteromycetes (Gliocladium virens, Penicillium simplicissimum, P. janthinellum, Phialophora alba, P. hoffmannii, Trichoderma harzianum), a Dematiaceae (Scopulariopsis brumptii) and a Sphaeropsidale (Coniothyrium fuckelii). Zygomycetes appeared as one of the most efficient taxonomic groups, especially with Mucor racemosus. Penicillium crustosum was the only strain that did not degrade pyrene. Among the 10 fungi which were performant for pyrene degradation, nine were not yet reported in the literature and showed a real value for PAH remediation.
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Affiliation(s)
- C Ravelet
- Laboratoire de Botanique, Cryptogamie, Biologie Cellulaire et Génétique, UFR de Pharmacie de Grenoble, Université J. Fourier, Meylan, France
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Abstract
Exserohilum sodomii sp. nov., is described. This new species was isolated from a soil sample from the Dead Sea surroundings. Its main physiological properties, as well as the influence of temperature and salts concentration in the culture medium on growth and morphology of the fungus were investigated and discussed.
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Affiliation(s)
- P Guiraud
- Groupe pour l'Etude du Devenir des Xénobiotiques dans l'Environnement (GEDEXE), UFR Pharmacie (Université Joseph Fourier), Meylan, France
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Abstract
Samples were taken from the top 10 cm of soils from 24 points in the Ein Gedi area. Among 329 isolates, 142 species were identified: 11 genera of ascomycetes, one genus of coelomycetes, 28 genera of hyphomycetes, 7 genera of zygomycetes and one yeast, in addition to some unidentified basidiomycetes. The hyphomycetes were represented by 17 dematiaceous, 9 mucedinaceous and two tuberculariaceous. Melanconiaceous and stilbellaceous genera were not found. Two new varieties of Microascus recently described were reisolated. No strict thermophiles or halophiles were obtained. There is apparently no very characteristic or specific fungal flora of the Dead Sea Oases although it was different from that found in the desert soil surrounding this area.
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Affiliation(s)
- R Steiman
- Groupe pour l'Etude edu Devenir des Xénobiotiques dans l'Environnement (GEDEXE), UFR Pharmacie (Université Joseph Fourier), Meylan, France
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Sage L, Bennasser L, Steiman R, Seigle-Murandi F. Fungal microflora biodiversity as a function of pollution in Oued Sebou (Morocco). Chemosphere 1997; 35:751-759. [PMID: 9253167 DOI: 10.1016/s0045-6535(97)00196-3] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
An inventory of the fungal microflora present in sediments collected at 11 sites along Oued Sebou has been established. The influence of some climatic parameters (temperature, rainfall) and of pollution on the composition of the fungal communities has been questioned. Emericella nidulans, Eurotium amstelodami, Neosartotya fisheri var. glabrum (Ascomycetes), Dreschslera biseptata (Dematiaceae), Penicillium citrinum (Mucedinaceae) and Phoma sp. (Sphaeropsidale) can be considered as strains sensitive to pollution. Penicillium janthelinum, Trichoderma koningii (Mucedinaceae) and Candida albicans (Yeast) were found only at the most polluted sites; Talaromyces flavus (Ascomycete) Rhodotorula rubra, Saccharomyces cerevisiae (Yeasts) and Fusarium oxysporum (Tuberculariales) were more often found at heavily polluted sites than at lightly polluted ones.
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Affiliation(s)
- L Sage
- Groupe pour l'Etude du Devenir des Xénobiotiques dans l'Environnement (GEDEXE), Université Joseph Fourier (Grenoble 1), Meylan, France
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21
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Guiraud P, Sage L, Seigle-Murandi F, Steiman R. Podospora Lautarea sp. nov. from Southern Alps (France): description and physiological properties. Antonie Van Leeuwenhoek 1994; 66:351-5. [PMID: 7710284 DOI: 10.1007/bf00882772] [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] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A taxonomic description of Podospora Lautarea sp. nov. is provided. This species is characterized by a reddish brown peridium, and by its large, asymmetric ascospores, small, hyaline, unique primary appendage, absence of secondary appendage and cylindrical asci. Due to the size of its appendage, this species may be related to Podospora minicaudaFaureal et Locquin-Linard. Asci and ascospores are close to those of P. fimbriata (Bayer) Cain, but the dimensions and ornamentation of perithecia are quite different. To summarize, this species belongs to the small group of Podospora exhibiting only one appendage (such as P. minicauda, P. carpinicola Mouchacca or P. horridula (Sacc.) Francis and Sparrow) but can not be assimilated to one of the described species in this group. The main cultural characteristics and physiological properties of this species are described.
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Affiliation(s)
- P Guiraud
- Groupe pour l'Etude du devenir des Xénobiotiques dans l'Environnement (GEDEXE), Université J. Fourier, Meylan, France
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Abstract
In the context of the screening for antifungal and antibacterial molecules among the Micromycetes, we investigated the ability of 850 strains grown in liquid medium to produce patulin. The compound was produced by 58 fungi, most of which had not been mentioned in the literature, especially Mucorales and Fungi Imperfecti. Biological tests showed that dermatophytes are the most sensitive to this molecule. It also appears that the origin of the producing strains influences their toxin producing activity.
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Affiliation(s)
- R Steiman
- Laboratoire de Botanique, Cryptogamie, Biologie Cellulaire et Génétique, Faculté de Pharmacie, Meylan, France
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23
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Steiman R, Seigle-Murandi F, Sage L. [Antifungigram of dermatophytes]. Ann Inst Pasteur Microbiol 1988; 139:485-91. [PMID: 3140848 DOI: 10.1016/0769-2609(88)90110-x] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The sensitivity of Microsporum gypseum to five antifungal agents was carried out by the disk diffusion method. The influence of the culture medium composition and physiological state of the microorganism was studied. The differed setting of antifungal disks enabled a comparative study of their action on spores and mycelium. Best results were obtained on a complex medium (Casitone) using spores as inoculum. The sensitivity of Microsporum canis, M. gypseum and Trichophyton interdigital to the five antifungal agents indicated the efficacy of imidazole compounds as compared to amphotericin B and nystatin .
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Affiliation(s)
- R Steiman
- Laboratoire de Botanique, Cryptogamie, Biologie Cellulaire et Génétique UFR de Pharmacie, Meylan, (France)
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Abstract
Isolated adult rat hepatocytes were cryopreserved by cooling, in the presence of dimethyl sulfoxide, to low subzero temperatures and they were stored for 14 days at -196 C. The cells were then recovered and transplanted into the splenic pulp of the original donor animal. A similar transplant procedure was performed with hepatocytes which had not been cryopreserved. Ultrastructural assessment was made 1 month after transplantation. In general fewer hepatocytes survived ectopic transplantation after cryopreservation, but the surviving cells were ultrastructurally similar to ectopically transplanted cells not subjected to cryopreservation. Thus, the reduced metabolic activity measured previously in transplants of cryopreserved hepatocytes is likely to result from a smaller number of competent cells rather than from hepatocytes which have survived in an extensively damaged or abnormal state.
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Sage L, Hambrey PN, Werchola GM, Mellors A, Tizard IR. Lysophospholipase 1 in Trypanosoma brucei. Tropenmed Parasitol 1981; 32:215-20. [PMID: 7345684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Protein fractions from Trypanosoma brucei brucei showed lysophospholipase 1 activity (E.E.3.1.1.5), against the substrate 1-acyl-sn-glycero-3-phosphocholine, and also phospholipase A1 activity (E.C.3.1.1.4) by hydrolysis of the 1-acyl bond of 1,2-diacyl-sn-glycero-3-phosphocholine. Both enzyme activities were eluted together and showed a 12-fold purification following Sephacryl S-200 column chromatography. A final 96-fold increase in activity was obtained by electrophoresis on nondenaturing polyacrylamide gels to yield a band containing both enzymic activities. Phospholipase A1 showed maximum activity between pH 6.0--8.5 and lysophospholipase 1 had a pH optimum of 8.5. Both activities were found mainly in the soluble fraction of disrupted trypanosomes and were similarly inhibited by N-ethylmaleimide and p-chloromercuribenzoic acid. Although Triton X-100 stimulated phospholipase A1 activity, it inhibited lysophospholipase 1 activity. The Km value for the lysophospholipase 1 was found to be 0.15 mM. It was not possible to resolve separate activities for lysophospholipase 1 and phospholipase A1 and the ratio of the two activities was approximately 1 : 10 for a variety of preparations and treatments. It is probable that a single enzyme displays both activities.
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