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Sy M, Thacker A, Sheehan OC, Leff B, Ritchie CS. Caring for caregivers and persons living with dementia under home-based primary care: protocol for an interventional clinical trial. Pilot Feasibility Stud 2024; 10:28. [PMID: 38336779 PMCID: PMC10854016 DOI: 10.1186/s40814-024-01455-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] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND Approximately 7.5 million older adults are homebound, who have difficulty and/or need assistance to leave their homes. In this growing population, the prevalence of people living with dementia (PLWD) is approximately 50%. Current dementia care models in the USA were developed for traditional office-based primary care and have not been tailored to home-based primary care (HBPC) delivery models. Literature has shown that office-based collaborative interventions can improve caregiver outcomes including caregiver stress, well-being, and morbidity and patient outcomes including improved quality of life and reduced emergency department visits (Possin KL, Merrilees JJ, Dulaney S, Bonasera SJ, Chiong W, Lee K, JAMA Int Med 179:1658, 2019). To date, the evidence for HBPC dementia interventions is lacking. Though HBPC has demonstrated benefit in homebound older adults, there is limited literature on the effects of HBPC on persons living with dementia (Nguyen HQ, Vallejo JD, Macias M, Shiffman MG, Rosen R, Mowry V, J Am Geriatr Soc 70:1136-46, 2021). Our goal is to develop a HBPC-focused dementia care intervention that integrates the components of two previously developed dementia care models and test the feasibility of implementing it in HBPC practices to improve the quality of life and wellbeing of homebound PLWD and their caregivers. METHODS We will first conduct qualitative focus groups at two HBPC practice sites, one in the Southeast and one in Hawaii in order to obtain preliminary feedback on the proposed intervention. At each site, there will be one focus group with caregivers of PLWD and another with HBPC clinicians and staff to help develop and refine our intervention. We will then conduct an open-pilot trial of the refined intervention at the two HBPC practices. A total of up to 25 patient/caregiver dyads will be recruited at each site (N = 50 total). Outcomes measured through pre-and-post assessments and exit interviews will include (a) feasibility for the caregiver to engage with and complete baseline assessments and access educational materials and community resources and (b) feasibility for the practice to identify potential caregivers/patients, assess eligible patient/caregiver dyads, use patient and caregiver assessments, recruit patient/caregiver dyads, recruit racial and ethnic minorities, use care modules, and engage with the tele-video case conference, (c) net promoter score, (d) acceptability of the intervention to caregivers and patients to participate in the intervention, (e) caregivers feeling heard and understood, and (f) caregiver well-being. DISCUSSION Testing the feasibility and acceptability of the adapted intervention in these two HBPC practices will provide the basis for future testing and evaluation of a fully powered intervention for PLWD and their caregivers cared for in HBPC with the goal of disseminating high-quality and comprehensive dementia-care focused interventions into HBPC practices. TRIAL REGISTRATION This trial was registered with ClinicalTrials.gov NCT05849259 in May 2023.
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Affiliation(s)
- Maimouna Sy
- Center for Aging and Serious Illness, Department of Palliative Care and Geriatric Medicine, Massachusetts General Hospital, Boston, MA, USA.
| | - Ayush Thacker
- Center for Aging and Serious Illness, Department of Palliative Care and Geriatric Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Orla C Sheehan
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Bruce Leff
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christine Seel Ritchie
- Center for Aging and Serious Illness, Department of Palliative Care and Geriatric Medicine, Massachusetts General Hospital, Boston, MA, USA
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Rochon EA, Sy M, Phillips M, Anderson E, Plys E, Ritchie C, Vranceanu AM. Bio-Experiential Technology to Support Persons With Dementia and Care Partners at Home (TEND): Protocol for an Intervention Development Study. JMIR Res Protoc 2023; 12:e52799. [PMID: 38157239 PMCID: PMC10787328 DOI: 10.2196/52799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 11/14/2023] [Accepted: 11/23/2023] [Indexed: 01/03/2024] Open
Abstract
BACKGROUND Alzheimer disease and related dementias are debilitating and incurable diseases. Persons with dementia and their informal caregivers (ie, dyads) experience high rates of emotional distress and negative health outcomes. Several barriers prevent dyads from engaging in psychosocial care including cost, transportation, and a lack of treatments that target later stages of dementia and target the dyad together. Technologically informed treatment and serious gaming have been shown to be feasible and effective among persons living with dementia and their care partners. To increase access, there is a need for technologically informed psychosocial interventions which target the dyad, together in the home. OBJECTIVE This study aims to develop the toolkit for experiential well-being in dementia, a dyadic, "bio-experiential" intervention for persons with dementia and their caregivers. Per our conceptual model, the toolkit for experiential well-being in dementia platform aims to target sustained attention, positive emotions, and active engagement among dyads. In this paper, we outline the protocol and conceptual model for intervention development and partnership with design and development experts. METHODS We followed the National Institutes of Health (NIH) stage model (stage 1A) and supplemented the model with principles of user-centered design. The first step includes understanding user needs, goals, and strengths. We met this step by engaging in methodology and definition synthesis and conducting focus groups with dementia care providers (N=10) and persons with dementia and caregivers (N=11). Step 2 includes developing and refining the prototype. We will meet this step by engaging dyads in up to 20 iterations of platform β testing workshops. Step 3 includes observing user interactions with the prototype. We will meet this step by releasing the platform for feasibility testing. RESULTS Key takeaways from the focus groups include balancing individualization and the dyadic relationship and avoiding confusing stimuli. As of September 2023, we have completed focus groups with providers, persons with dementia, and their caregivers. Additionally, we have conducted 4 iterations of β testing workshops with dyads. Feedback from focus groups informed the β testing workshops; data have not yet been formally analyzed and will be reported in future publications. CONCLUSIONS Technological interventions, particularly "bio-experiential" technology, can be used in dementia care to support emotional health among persons with a diagnosis and caregivers. Here, we outline a collaborative intervention development process of bio-experiential technology through a research, design, and development partnership. Next, we are planning to test the platform's feasibility as well as its impact on clinical outcomes and mechanisms of action. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/52799.
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Affiliation(s)
- Elizabeth A Rochon
- Center for Health Outcomes and Interdisciplinary Research, Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States
| | - Maimouna Sy
- Mongan Institute Center for Aging and Serious Illness and the Division of Palliative Care and Geriatric Medicine, Department of Medicine, Massachusetts General Hospital, Boston, MA, United States
| | | | | | - Evan Plys
- Center for Health Outcomes and Interdisciplinary Research, Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Christine Ritchie
- Mongan Institute Center for Aging and Serious Illness and the Division of Palliative Care and Geriatric Medicine, Department of Medicine, Massachusetts General Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Ana-Maria Vranceanu
- Center for Health Outcomes and Interdisciplinary Research, Department of Psychiatry, Massachusetts General Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
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Sy M, Ritchie CS, Vranceanu AM, Bakhshaie J. Palliative Care Clinical Trials in Underrepresented Ethnic and Racial Minorities: A Narrative Review. J Palliat Med 2023. [PMID: 38064535 DOI: 10.1089/jpm.2023.0124] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2024] Open
Abstract
Introduction: A growing number of patients with serious illness who would benefit from palliative care are part of ethnoracial minority groups. Nevertheless, large disparities in provision of palliative services exist for minoritized populations. Furthermore, there is a relative dearth of palliative care research focused on minority groups and how best to provide high-quality, culturally tailored palliative care. The aim of this narrative review is to summarize the existing literature regarding palliative care clinical trials in underrepresented minority populations, describe methodological approaches, and provide guidance on future palliative care-focused clinical trials. Methods: We used the Scale for the Assessment of Narrative Review Articles (SANRA) and Cochrane's guidelines on conducting reviews. We used PubMed and Clinicaltrials.gov to review published, full-text articles or protocols (1950-2022), and limited to palliative care interventions focused on ethnoracial minority populations. We included randomized clinical trials (RCTs), including pilot and feasibility trials, protocols of RCTs, and studies that report RCT methodology. Two reviewers independently assessed eligibility. Results: Our search yielded 585 publications; of these, 30 met the full-text review criteria and 16 studies met our criteria for inclusion. We deemed nine articles as having low risk of bias and four as having high risk of bias. Discussion: Commonly used methodologic approaches for clinical trials in underrepresented minority populations included the following: the use of written and visual materials that were no higher than a sixth-grade reading level, the use of patient and lay health navigators, bilingual and multicultural study staff and study materials, race-concordant staff, the option of in-person and virtual visits that accommodated the patient and family's schedule, recruitment from faith communities, and the use of community-engaged research principles. Future palliative care clinical trials should expand on the strategies described in this article, adopt effective strategies currently used in nonpalliative care interventions, and innovate around the principles of community-engaged research.
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Affiliation(s)
- Maimouna Sy
- Center for Aging and Serious Illness, Department of Palliative Care and Geriatric Medicine, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Christine Seel Ritchie
- Center for Aging and Serious Illness, Department of Palliative Care and Geriatric Medicine, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ana-Maria Vranceanu
- Center for Health Outcomes and Interdisciplinary Research, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Jafar Bakhshaie
- Center for Health Outcomes and Interdisciplinary Research, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, USA
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Diop N, Dieng M, Sy M, Gueye MV, Diallo AS, Dieye M, Ndiade A, Ngom AI, Diatta AL, Faye O. Contribution to a better analysis of spermatic and ultrasound testicular parameters in the follow-up of male infertility at the Histology Embryology Cytogenetic Laboratory of Cheikh Anta Diop University (UCAD). Morphologie 2023:S1286-0115(23)00025-5. [PMID: 36842934 DOI: 10.1016/j.morpho.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/28/2023]
Abstract
INTRODUCTION In Senegal, marital infertility is a real problem for society. We undertook the study of this subject to make an analysis of the spermatic parameters of the infertile Senegalese man and to better understand the impact of testicular morphological anomalies on male fertility. PATIENTS AND METHODS We conducted a cross-sectional, descriptive, retrospective study of 100 infertile patients followed at the Histology-Embryology-Cytogenetics laboratory of UCAD in Dakar, during the year 2020. Sperm parameters, presence of varicocele, and testicular volume were evaluated in our patients. RESULTS/DISCUSSION The mean age of the patients was 35.17±8.7 years. A history of sexually transmitted infections was found in 57% of patients. The mean duration of infertility was 5.67±3.2 years. The mean sperm count was 14,871,230/ml±4,950,000. Necrospermia was the most frequent abnormality found (60%), followed by asthenospermia (51%). The high rate of necrospermia could be explained by the high frequency of sexually transmitted infections. Other abnormalities were oligospermia (48%, including 09% cryptospermia), azoospermia (19%), teratospermia (19%), and hypospermia (13%). The predominance of azoospermia and oligospermia should prompt a search for a genetic predisposition in these subjects. The mean testicular volume was 10.3±4.9 cc on the right and 9.5±4.8 cc on the left. A single or bilateral varicocele was found in 43% of subjects. Patients with azoospermia and teratospermia were associated with testicular hypotrophy with a significant value (p=0.04). CONCLUSION Overall, the senegalese man consulting for infertility is a young adult, married for an average of 5 years. Necrospermia is the most frequently found anomaly. The severity of both qualitative and quantitative abnormalities should lead to a systematic search for a genetic origin. The etiological research of infertile patients must be done within a multidisciplinary framework to propose better management of these patients.
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Affiliation(s)
- N Diop
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal; Laboratory of clinical cytology, cytogenetics, biology of reproduction and human development, Aristide Le Dantec Hospital, Dakar, Senegal.
| | - M Dieng
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal
| | - M Sy
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal; Laboratory of clinical cytology, cytogenetics, biology of reproduction and human development, Aristide Le Dantec Hospital, Dakar, Senegal
| | - M V Gueye
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal; Laboratory of clinical cytology, cytogenetics, biology of reproduction and human development, Aristide Le Dantec Hospital, Dakar, Senegal
| | - A S Diallo
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal; Laboratory of clinical cytology, cytogenetics, biology of reproduction and human development, Aristide Le Dantec Hospital, Dakar, Senegal
| | - M Dieye
- Thiaroye psychiatric hospital, Dakar, Senegal
| | - A Ndiade
- Laboratory of histology-embryology-cytology-cytogenetics and reproductive biology of Alioune Diop University, Bambey, Senegal
| | - A I Ngom
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal
| | - A L Diatta
- Laboratory of histology-embryology-cytology-cytogenetics and reproductive biology of the Assane SECK University, Ziguinchor, Senegal
| | - O Faye
- Histology-Embryology-Cytogenetic Laboratory, Department of Biology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, Dakar, Senegal; Laboratory of clinical cytology, cytogenetics, biology of reproduction and human development, Aristide Le Dantec Hospital, Dakar, Senegal
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Keeney T, Flom M, Ding J, Sy M, Leung K, Kim DH, Orav J, Vogeli C, Ritchie CS. Using a Claims-Based Frailty Index to Investigate Frailty, Survival, and Healthcare Expenditures among Older Adults Hospitalized for COVID-19 at an Academic Medical Center. J Frailty Aging 2023; 12:150-154. [PMID: 36946713 PMCID: PMC9948774 DOI: 10.14283/jfa.2023.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND Frailty is associated with mortality in older adults hospitalized with COVID-19, yet few studies have quantified healthcare utilization and spending following COVID-19 hospitalization. OBJECTIVE To evaluate whether survival and follow-up healthcare utilization and expenditures varied as a function of claims-based frailty status for older adults hospitalized with COVID-19. DESIGN Retrospective cohort study. PARTICIPANTS 136 patients aged 65 and older enrolled in an Accountable Care Organization (ACO) risk contract at an academic medical center and hospitalized for COVID-19 between March 11, 2020 - June 3, 2020. MEASUREMENTS We linked a COVID-19 Registry with administrative claims data to quantify a frailty index and its relationship to mortality, healthcare utilization, and expenditures over 6 months following hospital discharge. Kaplan Meier curves and Cox Proportional Hazards models were used to evaluate survival by frailty. Kruskal-Wallis tests were used to compare utilization. A generalized linear model with a gamma distribution was used to evaluate differences in monthly Medicare expenditures. RESULTS Much of the cohort was classified as moderate to severely frail (65.4%), 24.3% mildly frail, and 10.3% robust or pre-frail. Overall, 27.2% (n=37) of the cohort died (n=26 during hospitalization, n=11 after discharge) and survival did not significantly differ by frailty. Among survivors, inpatient hospitalizations during the 6-month follow-up period varied significantly by frailty (p=0.02). Mean cost over follow-up was $856.37 for the mild and $4914.16 for the moderate to severe frailty group, and monthly expenditures increased with higher frailty classification (p <.001). CONCLUSIONS In this cohort, claims-based frailty was not significantly associated with survival but was associated with follow-up hospitalizations and Medicare expenditures.
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Affiliation(s)
- T Keeney
- Tamra Keeney, DPT, PhD, Mongan Institute Center for Aging and Serious Illness, Massachusetts General Hospital, 100 Cambridge Street, Suite 1600, Boston MA, 02114,USA, Phone (617) 726-9392,
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Salles P, Sy M, Fernandez H, Gostkowski M. Dramatic response of coprolalia to dronabinol in Tourette syndrome: A case report. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.395] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Fakih M, Ouyang C, Wang C, Tu T, Cho M, Sy M, Longmate J, Lee P. High PD-L1 expression and high CD8+ T-cell infiltration identifies a new subpopulation of colorectal cancer with high risk of relapse and poor outcome. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.084] [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: 11/13/2022] Open
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Gong J, Sy M, Fakih M. The genomic complexity of metastatic colorectal tumors by age, gender, race, and location of primary tumor using next-generation sequencing. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw370.86] [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: 11/14/2022] Open
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Simon-Cornu M, Beaugelin-Seiller K, Boyer P, Calmon P, Garcia-Sanchez L, Mourlon C, Nicoulaud V, Sy M, Gonze MA. Evaluating variability and uncertainty in radiological impact assessment using SYMBIOSE. J Environ Radioact 2015; 139:91-102. [PMID: 25464045 DOI: 10.1016/j.jenvrad.2014.09.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 02/13/2014] [Revised: 09/09/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
SYMBIOSE is a modelling platform that accounts for variability and uncertainty in radiological impact assessments, when simulating the environmental fate of radionuclides and assessing doses to human populations. The default database of SYMBIOSE is partly based on parameter values that are summarized within International Atomic Energy Agency (IAEA) documents. To characterize uncertainty on the transfer parameters, 331 Probability Distribution Functions (PDFs) were defined from the summary statistics provided within the IAEA documents (i.e. sample size, minimal and maximum values, arithmetic and geometric means, standard and geometric standard deviations) and are made available as spreadsheet files. The methods used to derive the PDFs without complete data sets, but merely the summary statistics, are presented. Then, a simple case-study illustrates the use of the database in a second-order Monte Carlo calculation, separating parametric uncertainty and inter-individual variability.
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Affiliation(s)
- M Simon-Cornu
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France.
| | - K Beaugelin-Seiller
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
| | - P Boyer
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
| | - P Calmon
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SESURE, LERCM, Cadarache, France
| | - L Garcia-Sanchez
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, L2BT, Cadarache, France
| | - C Mourlon
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
| | - V Nicoulaud
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
| | - M Sy
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
| | - M A Gonze
- Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PRP-ENV, SERIS, LM2E, Cadarache, France
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Kogerman P, Sy M, Culp L. Upregulation of CD44s in c-sis-transformed balb/c 3T3 cells by autocrine growth factor mechanisms, including PDGF. Int J Oncol 2012; 10:553-60. [PMID: 21533412 DOI: 10.3892/ijo.10.3.553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Regulation of CD44s by the c-sis oncogene product was investigated. Both CD44s protein and mRNA were comparably upregulated, consistent with some degree of transcriptional regulation; its ligand binding was also activated in confluent but not in sparse cultures of sis-transformed Balb/c 3T3 cells. CD44s was also elevated in confluent cultures of parental 3T3 cells treated with conditioned media from confluent c-sis transformants (but not from 3T3 cells); these media (but not media from ras transformants or parental 3T3 cells) contained platelet-derived growth factor (PDGF)-immunoreactive material. CD44s upregulation by these media could be partially blocked by anti-PDGF antibodies. These media also induced activation via tyrosine autophosphorylation and activation-dependent downregulation of PDGF beta-receptors. sis-transformed 3T3 cells contained low levels of PDGF receptor, but CD44 levels could still be increased in these cells by addition of PDGF. These results suggest that CD44s is upregulated in confluent cultures of c-sis-transformed cells by autocrine growth factors, including PDGF, secreted into the cell's microenvironment.
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Affiliation(s)
- P Kogerman
- CASE WESTERN RESERVE UNIV,SCH MED,DEPT MOL BIOL & MICROBIOL,CLEVELAND,OH 44106. CASE WESTERN RESERVE UNIV,SCH MED,DEPT PATHOL,CLEVELAND,OH 44106
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Leconte I, Abraham C, Galant C, Sy M, Berlière M, Fellah L. Fibroadenoma: Can fine needle aspiration biopsy avoid short term follow-up? Diagn Interv Imaging 2012; 93:750-6. [DOI: 10.1016/j.diii.2012.04.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ndir I, Gaye A, Sy M, Gaye O, Ndir O. [Prevalence of intestinal parasitis at the King Baudouin health center of Guediawaye (Senegal)]. Dakar Med 2002; 47:168-71. [PMID: 15776669] [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] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A prospective study carrying on 302 samples of stools of aged children of 0 to 15 years has been achieved between January 02 and April 11 2001 in the center of health Roi Baudouin of Guediawaye (SENEGAL) to appreciate the prevalence of intestinal parasitis. For every child, we made a scotch test, a macroscopic exam of stools and a microscopic exam to the direct analysis and after concentration by the method of RITCHIE simplified. The global prevalence is 56,62%. Ascaris lumbricoides arrived in head with 34,17%, follow-up of Giardia lamblia (22,50%), Trichirus trichiura (22,08%) and Amoeba (14,58%). The prevalence varied with age and the children who are 11 to 15 years have the indication of infestation the most elevated (75,86%): The difference of prevalence to the sex and according to the presence or no current water is not meaningful. On the other hand topics to weak standard of living have an indication elevated parasitis with 66,05%. So measures of efficient struggle must be undertaken to combat these intestinal parasitis.
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Affiliation(s)
- I Ndir
- Centre de santé Roi Baudouin - Guédiawaye (Sénégal).
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Jin T, Gu Y, Zanusso G, Sy M, Kumar A, Cohen M, Gambetti P, Singh N. The chaperone protein BiP binds to a mutant prion protein and mediates its degradation by the proteasome. J Biol Chem 2000; 275:38699-704. [PMID: 10970892 DOI: 10.1074/jbc.m005543200] [Citation(s) in RCA: 137] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Familial prion diseases are thought to result from a change in structure of the mutant prion protein (PrP), which takes a pathogenic conformation. We have examined the role of molecular chaperones in the folding of normal and mutant PrP Q217R (PrP(217)) in transfected neuroblastoma cells. In a previous report we showed that, although most of the PrP(217) forms escape the endoplasmic reticulum quality control system and aggregate in post-Golgi compartments, a significant proportion of PrP(217) retains the C-terminal glycosylphosphatidyl inositol signal peptide (PrP32), and does not exit the endoplasmic reticulum (Singh, N., Zanusso, G., Chen, S. G., Fujioka, H., Richardson, S., Gambetti, P., and Petersen, R. B. (1997) J. Biol. Chem. 272, 28461-28470). We have now studied the folding and turnover of PrP32 to understand the mechanism by which abnormal PrP forms cause cellular toxicity in our cell culture model and in the human brain carrying the Gerstmann-Sträussler-Scheinker disease Q217R mutation. In this report, we show that PrP32 remains associated with the chaperone BiP for an abnormally prolonged period of time and is degraded by the proteasomal pathway. This study is the first demonstration that BiP is chaperoning the folding of PrP and plays a role in maintaining the quality control in the PrP maturation pathway. Our data provide new insight into the diverse pathways of mutant PrP metabolism and neurotoxicity.
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Affiliation(s)
- T Jin
- Division of Neuropathology, Institute of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
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Abstract
OBJECTIVE The purpose of our study was to determine prospectively the value of helical CT and of various signs of ischemia in the context of acute bowel obstruction. SUBJECTS AND METHODS All patients seen over a 3-year period with a CT diagnosis of small-bowel obstruction were included. There were 144 examinations in 142 patients. Images were interpreted prospectively with consensus by a fellow and an experienced gastrointestinal radiologist. Attention was focused on the presence of the following signs of strangulation and ischemia: reduced enhancement of the small-bowel wall, mural thickening, mesenteric fluid, congestion of small mesenteric veins, and ascites. A diagnosis of ischemia was made if enhancement of the bowel wall was reduced or if at least two of the other signs were found. Results were correlated with surgical findings in 73 cases and clinical follow-up in 71 cases. RESULTS A diagnosis of ischemia was made at surgery in 24 patients. CT diagnosis was correct in 23 patients (96% sensitivity). There were nine false-positive diagnoses (93% specificity). The negative predictive value of CT was 99%. Reduced enhancement of the bowel wall had a sensitivity of 48% and specificity of 100%, mural thickening had a sensitivity of 38% and specificity of 78%, mesenteric fluid had a sensitivity of 88% and specificity of 90%, congestion of mesenteric veins had a sensitivity of 58% and specificity of 79%, and ascites had a sensitivity of 75% and specificity of 76%. CONCLUSION Helical CT is a highly sensitive method to diagnose or rule out intestinal ischemia in the context of acute small-bowel obstruction.
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Affiliation(s)
- M Zalcman
- Department of Radiology, C. U. B. Hôpital Erasme, 808, Route de Lennik, 1070 Bruxelles, Belgium
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15
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Sy M, Zalcman M, Struyven J. Intraabdominal desmoid tumor. JBR-BTR 2000; 83:24. [PMID: 10769510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- M Sy
- Department of Radiology, Free University of Brussels, Belgium
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16
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Johnsen AK, Templeton DJ, Sy M, Harding CV. Deficiency of transporter for antigen presentation (TAP) in tumor cells allows evasion of immune surveillance and increases tumorigenesis. J Immunol 1999; 163:4224-31. [PMID: 10510359] [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] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Proteins involved in class I MHC (MHC-I) Ag processing, such as the TAP, are deficient in some human tumor cells. This suggests that antitumor responses by CD8 T cells provide selection pressure to favor outgrowth of cells with defective processing of tumor Ags. Nonetheless, this evidence is only correlative, and controlled in vivo experiments have been lacking to demonstrate that TAP deficiency promotes survival of tumor cells. To explore the role of Ag processing defects in tumor progression, matched panels of TAP1-positive and TAP1-negative tumor cell lines were generated from a parental transformed murine fibroblast line. Inoculation of C57BL/6 mice with TAP1-negative cells produced large and persistent tumors. In contrast, TAP1-positive cells did not generate lasting tumors, although small tumors were detected transiently and regressed spontaneously. Both TAP1-positive and TAP1-negative cells produced tumors in athymic mice, confirming that TAP-dependent differences in tumorigenicity were due to T cell-dependent immune responses. Inoculation of C57BL/6 mice with mixtures of TAP1-positive and TAP1-negative cells produced tumors composed exclusively of TAP1-negative cells, indicating in vivo selection for cells with TAP deficiency. Thus, loss of TAP function allows some tumor cells to avoid T cell-dependent elimination, resulting in selection for tumor cells with deficient Ag processing.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 2
- ATP-Binding Cassette Transporters/biosynthesis
- ATP-Binding Cassette Transporters/genetics
- ATP-Binding Cassette Transporters/metabolism
- Animals
- Antigen Presentation/genetics
- Antigen Presentation/immunology
- Cell Division/immunology
- Cell Line, Transformed
- Cell Transformation, Neoplastic/immunology
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Female
- Fibroblasts/immunology
- Fibroblasts/metabolism
- Fibroblasts/pathology
- Histocompatibility Antigens Class I/biosynthesis
- Killer Cells, Natural/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Nude
- RNA, Messenger/biosynthesis
- Sarcoma, Experimental/etiology
- Sarcoma, Experimental/immunology
- Sarcoma, Experimental/pathology
- T-Lymphocytes/immunology
- Transfection
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Affiliation(s)
- A K Johnsen
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
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17
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Sy M, Zalcman M, Simon J, Noel JC, Struyven J, Van Gansbeke D. Dual phase helical CT of a primary malignant fibrous histiocytoma of the right renal vein. Br J Radiol 1999; 72:899-900. [PMID: 10645198 DOI: 10.1259/bjr.72.861.10645198] [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: 11/05/2022] Open
Abstract
A case is reported of primary malignant fibrous histiocytoma of the right renal vein involving the ipsilateral kidney which showed early enhancement on dual phase helical CT. The correct diagnosis of a primary tumour of the renal vein involving the kidney was not made but in retrospect could have been achieved pre-operatively by considering several CT features.
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Affiliation(s)
- M Sy
- Department of Radiology, Hôpital Erasme, University of Brussels, Belgium
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18
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Donckier V, Closset J, Van Gansbeke D, Zalcman M, Sy M, Houben JJ, Lambilliotte JP. Contribution of computed tomography to decision making in the management of adhesive small bowel obstruction. Br J Surg 1998; 85:1071-4. [PMID: 9717999 DOI: 10.1046/j.1365-2168.1998.00813.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND In adhesive small bowel obstruction, the early recognition of complications such as strangulation or volvulus is essential to choose between surgical or conservative initial treatment. The objective of this study was to determine prospectively the contribution of computed tomography (CT) to decision making in the management of these patients. METHODS Patients with suspected adhesive small bowel obstruction had CT at admission. Patients with CT signs of volvulus or strangulation and/or clinical signs of peritoneal irritation underwent urgent surgery; other patients had conservative initial treatment. RESULTS Fifty-four patients were evaluated. CT demonstrated signs of strangulation or volvulus in 19 patients, including three with signs of peritoneal irritation. Within this group, urgent laparotomy was performed in 17 patients and confirmed the CT diagnosis in 16. Thirty-seven patients without clinical or CT signs of complications had initial conservative treatment; among them, seven of 12 with a distal obstruction determined by CT required a delayed operation for persisting obstruction, compared with two of 25 patients with a proximal obstruction (P < 0.01). CONCLUSION CT is useful for the evaluation of adhesive small bowel obstruction, to detect accurately patients with complications who require urgent operation and to determine the location of the adhesion, which represents a significant prognostic factor for success of conservative treatment.
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Affiliation(s)
- V Donckier
- Department of Abdominal Surgery, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
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19
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Sy M, Van Gansbeke D, Dussaussois L, Donckier V. Intestinal volvulus. J Belge Radiol 1997; 80:315. [PMID: 9479913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- M Sy
- Department of Radiology, Hôpital Erasme, ULB, Brussels, Belgium
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20
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Abstract
PURPOSE To determine whether measurement of the relative area of lung with attenuation coefficients lower than a certain threshold on thin-section computed tomographic (CT) scans obtained during expiration is a valuable method of quantifying the extent of pulmonary emphysema. MATERIALS AND METHODS Eighty-nine patients underwent CT (with 1-mm collimation) preoperatively during inspiration and expiration. Relative areas of lung with attenuation coefficients lower than various thresholds were calculated. These relative areas were compared with areas found macroscopically to have emphysema (59 patients [51 men, eight women; aged 40-77 years]) and with two microscopic indices (35 patients [29 men, six women; aged 42-77 years]) assessed on the resected specimens. RESULTS The valid expiratory CT thresholds were found to be -820 and 910 HU for microscopic and macroscopic emphysema, respectively. However, results of stepwise multiple regression analyses showed that the inspiratory threshold of -950 HU was superior for both macroscopically and microscopically quantified emphysema. The correlation coefficients in expiratory CT were higher for the pulmonary volumes but similar for the diffusing capacity. CONCLUSION Expiratory quantitative CT is not as accurate as inspiratory CT for quantifying pulmonary emphysema and probably reflects air trapping more than reduction in the alveolar wall surface.
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Affiliation(s)
- P A Gevenois
- Department of Radiology, Hôpital Erasme, Brussels, Belgium
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21
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Sy M, Van Gansbeke D, Simon J, Willemart S, Braudé P, Struyven J. Case report: Renal pseudotumours mimicking tumour recurrence after partial nephrectomy. Br J Radiol 1996; 69:359-62. [PMID: 8665139 DOI: 10.1259/0007-1285-69-820-359] [Citation(s) in RCA: 3] [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: 02/01/2023] Open
Abstract
Partial nephrectomy and tumour enucleation are increasingly accepted as an organ sparing approach for small renal cell carcinomas. Repeated computed tomography or sonography for the early detection of tumour recurrence are mandatory during the follow-up. We report two cases of renal pseudotumour mimicking a tumour recurrence: one case is related to the pseudotumoral appearance on sonography of a tumour defect filled by a fatty flap, and the other to the relative migration of an accessory spleen into the site of the cuneiform nephrectomy. The recognition of renal pseudotumours following partial nephrectomy prevents confusion with tumour recurrence on follow-up examinations.
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Affiliation(s)
- M Sy
- Department of Radiology, University of Brussels, Belgium
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22
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Scillia P, Sy M, Chaminade L, Gevenois PA. [Clinical role of spiral tomodensitometry in pulmonary disorders]. J Belge Radiol 1995; 78:83-5. [PMID: 7601819] [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] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Spiral CT of the lungs has taken the place of conventional CT in most indications. Until now, some specific indications, concerning the detection of lung nodules, the detection of central pulmonary thromboembolism and the description of the angioarchitecture of pulmonary arteriovenous malformations have been reported. This paper provides an overview of the clinical utility of this new technique.
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Affiliation(s)
- P Scillia
- Service de Radiologie, Hôpital Erasme, Université Libre de Bruxelles
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23
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Sy M. [Reasons for Senegalese migration determined by ethnic background and social status]. Pop Sahel 1991:29-35. [PMID: 12343342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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24
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Scott CF, Tsurufuji M, Benacerraf B, Sy M. Regulation of hapten-specific T cell response. I. Preferential induction of hyporesponsiveness to the D-end of the major histocompatibility complex in the hapten-specific cytotoxic T cell response. The Journal of Immunology 1984. [DOI: 10.4049/jimmunol.132.2.1063] [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: 01/02/2023]
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25
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Weber V, Schmolke M, Schweizer P, Sy M. [Peculiarities of acute appendicitis in women]. Chirurg 1976; 47:632-4. [PMID: 991689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A complete documentation of the clinical and operative findings and a comparison of these with the histologic diagnosis in nearly 900 appendectomy patients from a period of more than two years is presented. In this publication an account of the specific results of nearly 500 women is given. The influences of age, menstruation, and gynecologic illnesses are reported in detail. Sixty-five percent of all women were treated unnecessarily with appendectomy. However, the indications for this operation should not be limited on these grounds.
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Dhennin L, Sy M, Maillet M, Dhennin L. [New compound possessing a chemotherapeutic action with regard to experimental infection of the guinea pig by foot-and-mouth disease virus]. C R Acad Hebd Seances Acad Sci D 1966; 262:1657-60. [PMID: 4956355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Sy M, Maillet M. [On bis-(methyl-5-thienyl-2)-2,2 alkanes]. Bull Soc Chim Fr 1965; 9:2635-8. [PMID: 5848687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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28
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Sy M, Pilet C, Niel M, Maillet M, Goret P. [Antibacterial actions of some halogenated derivatives of m-xylenol]. Therapie 1965; 20:1071-7. [PMID: 5845202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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