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Alaverdyan H, Maeng J, Park PK, Reddy KN, Gaume MP, Yaeger L, Awad MM, Haroutounian S. Perioperative Risk Factors for Persistent Postsurgical Pain After Inguinal Hernia Repair: Systematic Review and Meta-Analysis. J Pain 2024:104532. [PMID: 38599265 DOI: 10.1016/j.jpain.2024.104532] [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] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/12/2024]
Abstract
Persistent postsurgical pain (PPSP) is one of the most bothersome and disabling long-term complications after inguinal hernia repair surgery. Understanding perioperative risk factors that contribute to PPSP can help identify high-risk patients and develop risk-mitigation approaches. The objective of this study was to systematically review and meta-analyze risk factors that contribute to PPSP after inguinal hernia repair. The literature search resulted in 303 papers included in this review, 140 of which were used for meta-analyses. Our results suggest that younger age, female sex, preoperative pain, recurrent hernia, postoperative complications, and postoperative pain are associated with a higher risk of PPSP. Laparoscopic techniques reduce the PPSP occurrence compared to anterior techniques such as Lichtenstein repair, and tissue-suture techniques such as Shouldice repair. The use of fibrin glue for mesh fixation was consistently associated with lower PPSP rates compared to tacks, staples, and sutures. Considerable variability was observed with PPSP assessment and reporting methodology in terms of study design, follow-up timing, clarity of pain definition, as well as pain intensity or interference threshold. High or moderate risk of bias in at least one domain was noted in >75% of studies. These may limit the generalizability of our results. Future studies should assess and report comprehensive preoperative and perioperative risk factors for PPSP adjusted for confounding factors, and develop risk-prediction models to drive stratified PPSP-mitigation trials and personalized clinical decision-making. PERSPECTIVE: This systematic review and meta-analysis summarizes the current evidence on risk factors for persistent pain after inguinal hernia repair. The findings can help identify patients at risk and test personalized risk-mitigation approaches to prevent pain. PROSPERO REGISTRATION: htttps://www.crd.york.ac.uk/prospero/display_record.php?RecordID=154663.
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Affiliation(s)
- Harutyun Alaverdyan
- Department of Anesthesiology, Washington University in St Louis School of Medicine, St. Louis, Missouri
| | - Jooyoung Maeng
- Department of Anesthesiology, Washington University in St Louis School of Medicine, St. Louis, Missouri
| | - Peter K Park
- Department of Orthopaedic Surgery, Washington University in St Louis School of Medicine, St. Louis, Missouri
| | - Kavya Narayana Reddy
- Department of Anesthesiology and Pain Management, Arkansas Children Hospital, University of Arkansas Medical Science, Little Rock, Arkansas
| | - Michael P Gaume
- Department of Pain Management, University of Kansas Health System-St Francis Hospital, Topeka, Kansas
| | - Lauren Yaeger
- Bernard Becker Medical Library, Washington University in St Louis School of Medicine, St. Louis, Missouri
| | - Michael M Awad
- Department of Surgery, Washington University in St Louis School of Medicine, St. Louis, Missouri
| | - Simon Haroutounian
- Department of Anesthesiology, Washington University in St Louis School of Medicine, St. Louis, Missouri
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Kalbfell R, Cohen-Cutler S, Grisham E, Bereitschaft C, Borst AJ, Green AM, Willis DN, Yaeger L, Blatt J, Sisk BA. Infectious complications of vascular anomalies treated with sirolimus: A systematic review. Pediatr Blood Cancer 2024; 71:e30758. [PMID: 37933207 DOI: 10.1002/pbc.30758] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/19/2023] [Accepted: 10/21/2023] [Indexed: 11/08/2023]
Abstract
BACKGROUND AND OBJECTIVES Initially developed as immunosuppressive agents, mammalian target of rapamycin (mTOR) inhibitors are currently used widely in the management of vascular malformations and tumors. The incidence of infectious complications in the vascular anomalies (VA) population is not well defined. The goal of this systematic review was to better define the types and severity of reported infectious complications in patients with VAs treated with mTOR inhibition. METHODS This was a systematic review conducted following PRISMA guidelines evaluating all research articles focused on infectious complications in patients with VAs treated with sirolimus or everolimus. Thirty articles including 1182 total patients and 316 infections (in 291 unique patients) were ultimately included. RESULTS The majority of infections were viral upper respiratory (n = 137, 54%), followed by pneumonia (n = 53, 20%), and cutaneous infections (n = 20, 8%). There were six total infection-related fatalities, which all occurred in patients younger than 2 years. Two cases of Pneumocystis jirovecii pneumonia (PJP) were reported. These were infants with kaposiform hemangioendothelioma (KHE) who were also treated with steroids and did not receive PJP prophylaxis. Almost one-third (n = 96, 32%) of infectious complications were graded 3-4 according to Common Terminology Criteria for Adverse Events (CTCAE) criteria. Details of patient age, subtype of VA, and timing of infection were lacking from many reports. CONCLUSIONS Most infectious complications reported in patients with VA on mTOR inhibitors were viral respiratory infections and non-severe. Bacteremia, infectious fatalities, and PJP are exceedingly rare. Future studies are needed to clarify the spectrum of infectious risks in VA patients and to provide guidance for infection prevention.
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Affiliation(s)
- Rachel Kalbfell
- Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sally Cohen-Cutler
- Department of Pediatrics, Division of Pediatric Oncology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Eric Grisham
- St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - Christine Bereitschaft
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alexandra J Borst
- Department of Pediatrics, Division of Pediatric Oncology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Abby M Green
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Pediatrics, Division of Infectious Diseases, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Daniel N Willis
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Lauren Yaeger
- Washington University School of Medicine, St. Louis, Missouri, USA
| | - Julie Blatt
- Department of Pediatrics, Division of Hematology/Oncology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Bryan A Sisk
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, USA
- Department of Medicine, Bioethics Research Center, Washington University School of Medicine, St. Louis, Missouri, USA
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Iltis AS, Rolf L, Yaeger L, Goodman MS, DuBois JM. Attitudes and beliefs regarding race-targeted genetic testing of Black people: A systematic review. J Genet Couns 2023; 32:435-461. [PMID: 36644818 DOI: 10.1002/jgc4.1653] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 10/25/2022] [Accepted: 10/28/2022] [Indexed: 01/17/2023]
Abstract
Geographical ancestry has been associated with an increased risk of various genetic conditions. Race and ethnicity often have been used as proxies for geographical ancestry. Despite numerous problems associated with the crude reliance on race and ethnicity as proxies for geographical ancestry, some genetic testing in the clinical, research, and employment settings has been and continues to be race- or ethnicity-based. Race-based or race-targeted genetic testing refers to genetic testing offered only or primarily to people of particular racial or ethnic groups because of presumed differences among groups. One current example is APOL1 testing of Black kidney donors. Race-based genetic testing raises numerous ethical and policy questions. Given the ongoing reliance on the Black race in genetic testing, it is important to understand the views of people who identify as Black or are identified as Black (including African American, Afro-Caribbean, and Hispanic Black) regarding race-based genetic testing that targets Black people because of their race. We conducted a systematic review of studies and reports of stakeholder-engaged projects that examined how people who identify as or are identified as Black perceive genetic testing that specifically presumes genetic differences exist among racial groups or uses race as a surrogate for ancestral genetic variation and targets Black people. Our review identified 14 studies that explicitly studied this question and another 13 that implicitly or tacitly studied this matter. We found four main factors that contribute to a positive attitude toward race-targeted genetic testing (facilitators) and eight main factors that are associated with concerns regarding race-targeted genetic testing (barriers). This review fills an important gap. These findings should inform future genetic research and the policies and practices developed in clinical, research, public health, or other settings regarding genetic testing.
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Affiliation(s)
| | - Liz Rolf
- Washington University in St. Louis School of Medicine
| | - Lauren Yaeger
- Washington University in St. Louis School of Medicine
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Abstract
BACKGROUND The Patient-Determined Disease Steps (PDDS) scale is a patient-reported measure of disability used by at least 3 North American multiple sclerosis (MS) registries. We conducted a systematic review of the psychometric properties of the PDDS scale as part of a harmonization effort related to disability measures used in MS registries. METHODS We searched the EMBASE, Ovid Medline, Scopus, Cochrane Database of Systematic Reviews, CENTRAL, CINAHL Plus, and ClinicalTrials.gov databases from database inception through July 28, 2020. Two reviewers independently screened abstracts and full-text reports for study inclusion and data extraction and assessed study quality and risk of bias. We included studies that assessed the validity or reliability of the PDDS scale. We conducted a meta-analysis to quantitatively summarize the findings. RESULTS From the 2476 abstracts screened, 234 articles underwent full-text review, of which 5 met the inclusion criteria. These studies assessed criterion validity, construct validity, and test-retest reliability. In all studies, criterion validity was assessed by correlating the PDDS scale score with the Expanded Disability Status Scale score (pooled r = 0.73; 95% CI, 0.66-0.79). Test-retest reliability was high (pooled intraclass correlation coefficient = 0.96; 95% CI, 0.92-0.99). CONCLUSIONS In this systematic review, the PDDS scale demonstrated criterion and construct validity for assessing disability in individuals with MS who have mild to moderate disabilities. This review also supports the test-retest reliability of the PDDS scale, although further studies with larger samples are needed.
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Affiliation(s)
- Ruth Ann Marrie
- From the Department of Internal Medicine (RAM, CM), Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- From the Department of Community Health Sciences (RAM), Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Caitlin McFadyen
- From the Department of Internal Medicine (RAM, CM), Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Lauren Yaeger
- From the Bernard Becker Medical Library, Washington University School of Medicine, St. Louis, MO, USA (LY)
| | - Amber Salter
- From the Section of Statistical Planning and Analysis, Department of Neurology, University of Texas Southwestern University, Dallas, USA (AS)
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Lim J, Chen D, McNicol E, Sharma L, Varaday G, Sharma A, Wilson E, Wright-Yatsko T, Yaeger L, Gilron I, Finnerup NB, Haroutounian S. Risk factors for persistent pain after breast and thoracic surgeries: a systematic literature review and meta-analysis. Pain 2022; 163:3-20. [PMID: 34001769 DOI: 10.1097/j.pain.0000000000002301] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 03/09/2021] [Indexed: 11/25/2022]
Abstract
ABSTRACT Persistent postsurgical pain (PPSP) is common after breast and thoracic surgeries. Understanding which risk factors consistently contribute to PPSP will allow clinicians to apply preventive strategies, as they emerge, to high-risk patients. The objective of this work was to systematically review and meta-analyze the literature on risk factors of PPSP after breast and thoracic surgeries. A systematic literature search using Ovid Medline, Cochrane Central Register of Controlled Trials, Cumulative Index to Nursing and Allied Health Literature, Embase, PsycINFO, and Scopus databases was conducted. Study screening with inclusion and exclusion criteria, data extraction, and risk of bias assessment was performed independently by 2 authors. The data for each surgical group were analyzed separately and meta-analyzed where possible. The literature search yielded 5584 articles, and data from 126 breast surgery and 143 thoracic surgery articles were considered for meta-analysis. In breast surgery, younger age, higher body mass index, anxiety, depression, diabetes, smoking, preoperative pain, moderate to severe acute postoperative pain, reoperation, radiotherapy, and axillary lymph node dissection were the main factors associated with higher risk of PPSP. In thoracic surgery, younger age, female sex, hypertension, preoperative pain, moderate to severe acute postoperative pain, surgical approach, major procedure, and wound complications were associated with PPSP. This systematic review demonstrated certain consistent risk factors of PPSP after breast and thoracic surgeries, as well as identified research gaps. Understanding the factors that increase susceptibility to PPSP can help selectively allocate resources to optimize perioperative care in high-risk patients and help develop targeted, risk-stratified interventions for PPSP prevention.
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Affiliation(s)
- Joshua Lim
- Saint Louis University School of Medicine, St. Louis, MO, United States
| | - Dili Chen
- University of Sydney School of Medicine, Sydney, Australia
| | | | - Lokesh Sharma
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Grihith Varaday
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Anshuman Sharma
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Elizabeth Wilson
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Tiffany Wright-Yatsko
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Lauren Yaeger
- Becker Medical Library, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
| | - Ian Gilron
- Departments of Anesthesiology & Perioperative Medicine, Biomedical & Molecular Sciences, Centre for Neuroscience Studies, and School of Policy Studies, Queen's University, Kingston, Ontario, Canada
| | - Nanna B Finnerup
- Department of Clinical Medicine, Danish Pain Research Center, Aarhus University, Aarhus, Denmark
| | - Simon Haroutounian
- Department of Anesthesiology, Washington University in St. Louis School of Medicine, St. Louis, MO, United States
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Cheng SY, Davis M, Jonson-Reid M, Yaeger L. Compared to What? A Meta-Analysis of Batterer Intervention Studies Using Nontreated Controls or Comparisons. Trauma Violence Abuse 2021; 22:496-511. [PMID: 31359840 DOI: 10.1177/1524838019865927] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This meta-analysis updates the literature on the effectiveness of batterer intervention programs (BIPs) in decreasing recidivism of domestic violence (DV) by focusing on studies with nontreated comparison groups (N = 17). Included studies were published between 1986 and 2016, and 14 of the 17 provided sufficient information for the meta-analysis. Analysis focused on three reported outcomes: DV recidivism reported by the criminal justice system, intimate partner violence (IPV) perpetration assessed by the survivor, and general offense recidivism reported by the criminal justice system. Results of meta-analysis indicated that BIPs were effective in decreasing DV recidivism and general offense recidivism when reported by the criminal justice system, but not when assessed by the survivor. BIP participants were about 3 times less likely to have DV recidivism and about 2.5 times less likely to have general offense recidivism, compared to nontreated control/comparison groups. The pooled effect size varied, however, by research design. Specifically, results indicated a nonsignificant pooled effect size for randomized controlled trials but a significant pooled effect size for quasi-experimental design studies. Implications for future practice and research are discussed.
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Affiliation(s)
- Shih-Ying Cheng
- Brown School, 7548Washington University in St. Louis, St. Louis, MO, USA
| | - Maxine Davis
- School of Social Work, 12329The University of Texas at Arlington, Arlington, TX, USA
| | | | - Lauren Yaeger
- Becker Medical Library, 7548Washington University School of Medicine in St. Louis, St. Louis, MO, USA
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Mejia-Chew C, Yaeger L, Montes K, Bailey TC, Olsen MA. Diagnostic Accuracy of Health Care Administrative Diagnosis Codes to Identify Nontuberculous Mycobacteria Disease: A Systematic Review. Open Forum Infect Dis 2021; 8:ofab035. [PMID: 34041304 PMCID: PMC8134528 DOI: 10.1093/ofid/ofab035] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/19/2021] [Indexed: 11/16/2022] Open
Abstract
Background Health care administrative database research frequently uses standard medical codes to identify diagnoses or procedures. The aim of this review was to establish the diagnostic accuracy of codes used in administrative data research to identify nontuberculous mycobacterial (NTM) disease, including lung disease (NTMLD). Methods We searched Ovid Medline, Embase, Scopus, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov from inception to April 2019. We included studies assessing the diagnostic accuracy of International Classification of Diseases, 9th edition, Clinical Modification (ICD-9-CM) diagnosis codes to identify NTM disease and NTMLD. Studies were independently assessed by 2 researchers, and the Quality Assessment of Diagnostic Accuracy Studies 2 tool was used to assess bias and quality. Results We identified 5549 unique citations. Of the 96 full-text articles reviewed, 7 eligible studies of moderate quality (3730 participants) were included in our review. The diagnostic accuracy of ICD-9-CM diagnosis codes to identify NTM disease varied widely across studies, with positive predictive values ranging from 38.2% to 100% and sensitivity ranging from 21% to 93%. For NTMLD, 4 studies reported diagnostic accuracy, with positive predictive values ranging from 57% to 64.6% and sensitivity ranging from 21% to 26.9%. Conclusions Diagnostic accuracy measures of codes used in health care administrative data to identify patients with NTM varied across studies. Overall the positive predictive value of ICD-9-CM diagnosis codes alone is good, but the sensitivity is low; this method is likely to underestimate case numbers, reflecting the current limitations of coding systems to capture NTM diagnoses.
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Affiliation(s)
- Carlos Mejia-Chew
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Lauren Yaeger
- Bernard Becker Medical Library, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Kevin Montes
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Thomas C Bailey
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Margaret A Olsen
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
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Cler SJ, Sharifai N, Baker B, Dowling JL, Pipkorn P, Yaeger L, Clifford DB, Dahiya S, Chicoine MR. IgG4-Related Disease of the Skull and Skull Base-A Systematic Review and Report of Two Cases. World Neurosurg 2021; 150:179-196.e1. [PMID: 33746107 DOI: 10.1016/j.wneu.2021.03.054] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 02/07/2021] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 12/15/2022]
Abstract
OBJECTIVE IgG4-related disease (IgG4-RD) is an inflammatory process that uncommonly can present in the skull base and calvarium and mimic a tumor but the nature of this condition is not well summarized in the neurosurgical literature. METHODS A review was performed of 2 cases of IgG4-RD in the skull base highlighting the diagnostic challenges with assessment of these skull base lesions, and a systematic review of relevant literature was carried out. RESULTS A systematic review of the literature conducted in accordance with PRISMA guidelines identified 113 articles, with 184 cases of IgG4-RD in the skull base or calvarium. The most commonly affected locations include the meninges, cavernous sinus, base of the posterior fossa, clivus, and mastoid bone. Headache, visual and auditory disturbances, cranial nerve dysfunction, and seizures were the most common presenting symptoms. Medical treatment was highly successful and most commonly consisted of corticosteroids coadministered with immunosuppressive agents such as rituximab. Prevalence seemed to be equal between sexes, and serum IgG4 levels were increased in 61% of patients. Delayed diagnosis and a need for multiple biopsies were reported in numerous cases. Two cases of skull base IgG4-RD from the authors' institution show the variable presentations of this disease. More invasive surgical biopsies were required in both cases, and corticosteroid treatment led to significant clinical improvement. CONCLUSIONS IgG4-RD is an uncommon condition with an increasing body of reported cases that can affect the skull base and calvarium and should be in the differential diagnosis, because delay in diagnosis and treatment may be common.
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Affiliation(s)
- Samuel J Cler
- Department of Neurosurgery, Washington University School of Medicine, Washington, D.C., USA.
| | - Nima Sharifai
- Department of Pathology and Immunology, Washington University School of Medicine, Washington, D.C., USA
| | - Brandi Baker
- Department of Neurology, Washington University School of Medicine, Washington, D.C., USA
| | - Joshua L Dowling
- Department of Neurosurgery, Washington University School of Medicine, Washington, D.C., USA
| | - Patrik Pipkorn
- Department of Otolaryngology, Washington University School of Medicine, Washington, D.C., USA
| | - Lauren Yaeger
- Bernard Becker Medical Library, Washington University School of Medicine, Washington, D.C., USA
| | - David B Clifford
- Department of Neurology, Washington University School of Medicine, Washington, D.C., USA; Department of Infectious Disease, Washington University School of Medicine, Washington, D.C., USA
| | - Sonika Dahiya
- Department of Pathology and Immunology, Washington University School of Medicine, Washington, D.C., USA
| | - Michael R Chicoine
- Department of Neurosurgery, Washington University School of Medicine, Washington, D.C., USA
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Cohen F, Yaeger L. Task-shifting for refugee mental health and psychosocial support: A scoping review of services in humanitarian settings through the lens of RE-AIM. Implementation Research and Practice 2021; 2:2633489521998790. [PMID: 37089989 PMCID: PMC9978653 DOI: 10.1177/2633489521998790] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Decades of war, famines, natural disasters, and political upheaval have led to the largest number of displaced persons in human history. The refugee experience is fraught with obstacles from preflight to resettlement, leading to high rates of mental distress including post-traumatic stress disorder, depression, and anxiety. However, there is a paucity of mental health services for refugees in transit. To meet the needs of this vulnerable population, researchers are experimenting with teaching lay community members basic tools for the delivery of mental health and psychosocial support services (MHPSS). However, there are research gaps about the use of implementation science to inform the delivery of applicable interventions, especially within low resource settings, and even less in the humanitarian context. Methods: This review utilizes an implementation science framework (RE-AIM) to assess the reach, effectiveness, adoption, implementation, and maintenance of these interventions. Studies included varying interventions and modes of delivery within refugee camp and urban settings. A comprehensive search strategy led to the inclusion and analysis of 11 unique studies. Results: While current research documents adaptation strategies, feasibility, and fidelity checks through routine monitoring, there is still a dearth of evidence regarding capacity building of lay providers in humanitarian settings. Barriers to this data collection include a lack of homogeneity in outcomes across studies, and a lack of comprehensive adaptation strategies which account for culture norms in the implementation of interventions. Furthermore, current funding prioritizes short-term solutions for individuals who meet criteria for mental illnesses and therefore leaves gaps in sustainability, and more inclusive programming for psychosocial services for individuals who do not meet threshold criteria. Conclusion: Findings contribute to the literature about task-shifting for MHPSS in humanitarian contexts, especially illuminating gaps in knowledge about the lay counselor experiences of these interventions. Plain language summary: There is a growing number of refugees forced to make homes in temporary camps or urban centers as they await resettlement, a process that can last decades. These refugees are at risk of serious mental health outcomes due to ongoing stress and trauma. One strategy commonly used in global mental health is the training of lay providers to deliver basic mental health and psychosocial programming to communities. While this tactic is currently being tested in refugee settings, there is limited evidence about the implementation of this strategy. The following scoping review aims to assess the implementation of task-shifting interventions within refugee settings, through the use of a robust implementation science framework.
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Affiliation(s)
- Flora Cohen
- Washington University in St. Louis, St. Louis, MO, USA
| | - Lauren Yaeger
- Washington University in St. Louis, St. Louis, MO, USA
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Chen SY, Massa S, Mazul AL, Kallogjeri D, Yaeger L, Jackson RS, Zevallos J, Pipkorn P. The association of smoking and outcomes in HPV-positive oropharyngeal cancer: A systematic review. Am J Otolaryngol 2020; 41:102592. [PMID: 32521295 DOI: 10.1016/j.amjoto.2020.102592] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/06/2020] [Accepted: 05/25/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE While smoking is linked to worse outcomes for human papillomavirus (HPV)-related oropharyngeal squamous cell cancer (OPSCC), the magnitude of this association and the amount of smoking exposure necessary to confer clinically significant differences in outcomes is unclear. Recent studies suggested that greater tobacco exposure results in higher risk of cancer progression and death. Our study objective was to perform a systematic review of the association between smoking and HPV-related OPSCC outcomes. MATERIALS AND METHODS A literature search was conducted in April 2019 to identify relevant articles using Embase, Medline, Scopus, CENTRAL, and Cochrane databases. All studies were independently screened by two investigators to identify studies that assessed HPV-positive patients as an independent cohort, specified smoking measures, and reported locoregional recurrence (LRR), overall survival (OS), disease-specific survival (DSS), or disease-free survival (DFS) in association with smoking. RESULTS Of 1130 studies identified, 10 met final inclusion criteria with 2321 total patients, mean age 57.5 years. Smoking measures included ever vs never, current vs never/former smokers, ≤10 vs >10 pack-year, and continuous pack-years. Of these studies, 8 (80%) showed a significant effect of smoking on increasing recurrence and mortality. Adjusted HRs for LRR ranged from 0.6 to 5.2, OS from 1.3 to 4.0, DSS from 2.3 to 7.2, and DFS from 1.02 to 4.2 among heavier smokers compared to lighter/non-smokers. CONCLUSIONS While there was significant variability in smoking metrics and reported outcomes, all studies reporting statistically significant HRs showed that smoking was associated with worse outcomes. Further studies using uniform smoking measures are necessary to better understand this association.
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Telles F, McNamara N, Nanayakkara S, Doyle MP, Williams M, Yaeger L, Marwick TH, Leeson P, Levy PT, Lewandowski AJ. Changes in the Preterm Heart From Birth to Young Adulthood: A Meta-analysis. Pediatrics 2020; 146:peds.2020-0146. [PMID: 32636236 DOI: 10.1542/peds.2020-0146] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/08/2020] [Indexed: 11/24/2022] Open
Abstract
CONTEXT Preterm birth is associated with incident heart failure in children and young adults. OBJECTIVE To determine the effect size of preterm birth on cardiac remodeling from birth to young adulthood. DATA SOURCES Data sources include Medline, Embase, Scopus, Cochrane databases, and clinical trial registries (inception to March 25, 2020). STUDY SELECTION Studies in which cardiac phenotype was compared between preterm individuals born at <37 weeks' gestation and age-matched term controls were included. DATA EXTRACTION Random-effects models were used to calculate weighted mean differences with corresponding 95% confidence intervals. RESULTS Thirty-two observational studies were included (preterm = 1471; term = 1665). All measures of left ventricular (LV) and right ventricular (RV) systolic function were lower in preterm neonates, including LV ejection fraction (P = .01). Preterm LV ejection fraction was similar from infancy, although LV stroke volume index was lower in young adulthood. Preterm LV peak early diastolic tissue velocity was lower throughout development, although preterm diastolic function worsened with higher estimated filling pressures from infancy. RV longitudinal strain was lower in preterm-born individuals of all ages, proportional to the degree of prematurity (R 2 = 0.64; P = .002). Preterm-born individuals had persistently smaller LV internal dimensions, lower indexed LV end-diastolic volume in young adulthood, and an increase in indexed LV mass, compared with controls, of 0.71 g/m2 per year from childhood (P = .007). LIMITATIONS The influence of preterm-related complications on cardiac phenotype could not be fully explored. CONCLUSIONS Preterm-born individuals have morphologic and functional cardiac impairments across developmental stages. These changes may make the preterm heart more vulnerable to secondary insults, potentially underlying their increased risk of early heart failure.
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Affiliation(s)
- Fernando Telles
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom.,Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia.,Royal Prince Alfred Hospital, Sydney, Australia
| | | | - Shane Nanayakkara
- Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Cardiovascular Medicine, The Alfred Hospital, Melbourne, Australia
| | | | | | - Lauren Yaeger
- Bernard Becker Medical Library, School of Medicine, Washington University in St Louis, St Louis, Missouri; and
| | - Thomas H Marwick
- Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia
| | - Paul Leeson
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Philip T Levy
- Boston Children's Hospital and Harvard Medical School, Harvard University, Boston, Massachusetts
| | - Adam J Lewandowski
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom;
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Laatsch L, Dodd J, Brown T, Ciccia A, Connor F, Davis K, Doherty M, Linden M, Locascio G, Lundine J, Murphy S, Nagele D, Niemeier J, Politis A, Rode C, Slomine B, Smetana R, Yaeger L. Evidence-based systematic review of cognitive rehabilitation, emotional, and family treatment studies for children with acquired brain injury literature: From 2006 to 2017. Neuropsychol Rehabil 2019; 30:130-161. [PMID: 31671014 DOI: 10.1080/09602011.2019.1678490] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 10/25/2022]
Abstract
This paper updates guidelines for effective treatments of children with specific types of acquired brain injury (ABI) published in 2007 with more recent evidence. A systematic search was conducted for articles published from 2006 to 2017. Full manuscripts describing treatments of children (post-birth to 18) with acquired brain injury were included if study was published in peer-reviewed journals and written in English. Two independent reviewers and a third, if conflicts existed, evaluated the methodological quality of studies with an Individual Study Review Form and a Joanna Briggs Institute (JBI) Critical Appraisal Checklist. Strength of study characteristics was used in development of practice guidelines. Fifty-six peer-reviewed articles, including 27 Class I studies, were included in the final analysis. Established guidelines for writing practice recommendations were used and 22 practice recommendations were written with details of potential treatment limitations. There was strong evidence for family/caregiver-focused interventions, as well as direct interventions to improve attention, memory, executive functioning, and emotional/behavioural functioning. A majority of the practice standards and guidelines provided evidence for the use of technology in delivery of interventions, representing an important trend in the field.
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Affiliation(s)
- Linda Laatsch
- Department of Neurology, University of Illinois, Chicago, IL, USA
| | | | - Tanya Brown
- Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA
| | - Angela Ciccia
- Department of Psychological Science and Communication Science Program, Case Western Reserve University, Cleveland, OH, USA
| | - Felicia Connor
- Rusk Rehabilitation, Langone Health, Outpatient Psychology and Neuropsychology, New York, NY, USA
| | - Kim Davis
- Department of Pediatrics, Psychology Section, Baylor College of Medicine, Houston, TX, USA
| | - Meghan Doherty
- Occupational Therapy and Occupational Science, Saint Louis University, Saint Louis, MO, USA
| | - Mark Linden
- School of Nursing and Midwifery, Queen's University Belfast, Belfast, UK
| | - Gianna Locascio
- Department of Neurology, New York University, New York, NY, USA
| | - Jennifer Lundine
- Department of Speech and Hearing Science, Ohio State University, Columbus, OH, USA
| | - Samantha Murphy
- Department of Psychology, University of Missouri-St. Louis, St. Louis, MO, USA
| | - Drew Nagele
- Department of Psychology, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, USA
| | - Janet Niemeier
- Department of Physical Medicine & Rehabilitation, Carolinas Medical Center, Charlotte, NC, USA
| | - Adam Politis
- National Institutes of Health, Bethesda, MD, USA
| | - Catrin Rode
- Center on Brain Injury Research and Training, University of Oregon, Eugene, OR, USA
| | - Beth Slomine
- Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, MD, USA.,Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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13
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Sisk BA, Schulz GL, Mack JW, Yaeger L, DuBois J. Communication interventions in adult and pediatric oncology: A scoping review and analysis of behavioral targets. PLoS One 2019; 14:e0221536. [PMID: 31437262 PMCID: PMC6705762 DOI: 10.1371/journal.pone.0221536] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 08/08/2019] [Indexed: 12/22/2022] Open
Abstract
Background Improving communication requires that clinicians and patients change their behaviors. Interventions might be more successful if they incorporate principles from behavioral change theories. We aimed to determine which behavioral domains are targeted by communication interventions in oncology. Methods Systematic search of literature indexed in Ovid Medline, Embase, Scopus, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, Clinicaltrials.gov (2000–October 2018) for intervention studies targeting communication behaviors of clinicians and/or patients in oncology. Two authors extracted the following information: population, number of participants, country, number of sites, intervention target, type and context, study design. All included studies were coded based on which behavioral domains were targeted, as defined by Theoretical Domains Framework. Findings Eighty-eight studies met inclusion criteria. Interventions varied widely in which behavioral domains were engaged. Knowledge and skills were engaged most frequently (85%, 75/88 and 73%, 64/88, respectively). Fewer than 5% of studies engaged social influences (3%, 3/88) or environmental context/resources (5%, 4/88). No studies engaged reinforcement. Overall, 7/12 behavioral domains were engaged by fewer than 30% of included studies. We identified methodological concerns in many studies. These 88 studies reported 188 different outcome measures, of which 156 measures were reported by individual studies. Conclusions Most communication interventions target few behavioral domains. Increased engagement of behavioral domains in future studies could support communication needs in feasible, specific, and sustainable ways. This study is limited by only including interventions that directly facilitated communication interactions, which excluded stand-alone educational interventions and decision-aids. Also, we applied stringent coding criteria to allow for reproducible, consistent coding, potentially leading to underrepresentation of behavioral domains.
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Affiliation(s)
- Bryan A. Sisk
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, United States of America
- * E-mail:
| | - Ginny L. Schulz
- Department of Pediatrics, Division of Hematology/Oncology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Jennifer W. Mack
- Pediatric Oncology and Division of Population Sciences, Dana-Farber Cancer Institute, Boston, Massachusetts; and Division of Pediatric Hematology/Oncology, Boston Children’s Hospital, Boston, Massachusetts, United States of America
| | - Lauren Yaeger
- Becker Library, Washington University School of Medicine, St. Louis, MO, United States of America
| | - James DuBois
- Department of Medicine, Division of General Medical Sciences, Washington University School of Medicine, St. Louis, Missouri, United States of Ameica
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14
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Griffey RT, Schneider RM, Todorov AA, Yaeger L, Sharp BR, Vrablik MC, Aaronson EL, Sammer C, Nelson A, Manley H, Dalton P, Adler L. Critical Review, Development, and Testing of a Taxonomy for Adverse Events and Near Misses in the Emergency Department. Acad Emerg Med 2019; 26:670-679. [PMID: 30859666 DOI: 10.1111/acem.13724] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/29/2019] [Accepted: 02/15/2019] [Indexed: 12/21/2022]
Abstract
OBJECTIVES An adverse event (AE) is a physical harm experienced by a patient due to health care, requiring intervention. Describing and categorizing AEs is important for quality and safety assessment and identifying areas for improvement. Safety science suggests that improvement efforts should focus on preventing and mitigating harm rather than on error, which is commonplace but infrequently leads to AEs. Most taxonomies fail to describe harm experienced by patients (e.g., hypoxia, hemorrhage, anaphylaxis), focusing instead on errors, and use categorizations that are too broad to be useful (e.g., "communication error"). We set out to create a patient-centered, emergency department (ED)-specific framework for describing AEs and near misses to advance quality and safety in the acute care setting. METHODS We performed a critical review of existing taxonomies of harm, evaluating their applicability to the ED. We identified and adopted a classification framework and developed a taxonomy using an iterative process categorizing approximately 600 previously identified AEs and near misses. We reviewed this taxonomy with collaborators at four medical centers, receiving feedback and providing clarification. We then disseminated a set of representative scenarios for these safety experts to categorize independently using the taxonomy. We calculated interrater reliability and performance compared to our criterion standard. RESULTS Our search identified candidate taxonomies for detailed review. We selected the Adventist Health Systems AE taxonomy and modified this for use in the ED, adopting a framework of categories, subcategories, and up to three modifiers to further describe events. On testing, overall reviewer agreement with the criterion standard was 92% at the category level and 88% at the subcategory level. Three of the four raters concurred in 55 of 59 scenarios (93%) and all four concurred in 46 of 59 scenarios (78%). At the subcategory level, there was complete agreement in 40 of 59 (68%) scenarios and majority agreement in 55 of 59 instances (93%). Performance of individual raters ranged from very good (88%, 52/59) to near perfect (98%, 58/59) at the main category level. CONCLUSIONS We developed a taxonomy of AEs and near misses for the ED, modified from an existing framework. Testing of the tool with minimal training yielded high performance and good inter-rater reliability. This taxonomy can be adapted and modified by EDs seeking to enhance their quality and safety reviews and characterize harm occurring in their EDs for quality improvement purposes.
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Affiliation(s)
- Richard T. Griffey
- Division of Emergency Medicine Washington University School of Medicine St. Louis MO
| | - Ryan M. Schneider
- Division of Emergency Medicine Washington University School of Medicine St. Louis MO
| | | | - Lauren Yaeger
- Washington University School of Medicine St. Louis MO
| | - Brian R. Sharp
- Department of Emergency Medicine University of Wisconsin School of Medicine and Public Health Madison WI
| | | | | | | | | | - Holly Manley
- Department of Clinical Patient Safety AdventHealth Altamonte FL
| | - Patricia Dalton
- Department of Clinical Patient Safety AdventHealth Altamonte FL
| | - Lee Adler
- Department of Clinical Patient Safety AdventHealth Altamonte FL
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15
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Griffey R, Schneider R, Todorov A, Yaeger L, Aaronson E, Sharp B, Vrablik M, Manley H, Nelson A, Sammer C, Adler L. 55 Development of a Novel Taxonomy for Adverse Events in the Emergency Department: Critical Review and Testing. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.060] [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: 11/30/2022]
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16
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Levy PT, Machefsky A, Sanchez AA, Patel MD, Rogal S, Fowler S, Yaeger L, Hardi A, Holland MR, Hamvas A, Singh GK. Reference Ranges of Left Ventricular Strain Measures by Two-Dimensional Speckle-Tracking Echocardiography in Children: A Systematic Review and Meta-Analysis. J Am Soc Echocardiogr 2015; 29:209-225.e6. [PMID: 26747685 DOI: 10.1016/j.echo.2015.11.016] [Citation(s) in RCA: 201] [Impact Index Per Article: 22.3] [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: 08/16/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Establishment of the range of reference values and associated variations of two-dimensional speckle-tracking echocardiography (2DSTE)-derived left ventricular (LV) strain is a prerequisite for its routine clinical adoption in pediatrics. The aims of this study were to perform a meta-analysis of normal ranges of LV global longitudinal strain (GLS), global circumferential strain (GCS), and global radial strain (GRS) measurements derived by 2DSTE in children and to identify confounding factors that may contribute to variance in reported measures. METHODS A systematic review was launched in MEDLINE, Embase, Scopus, the Cumulative Index to Nursing and Allied Health Literature, and the Cochrane Library. Search hedges were created to cover the concepts of pediatrics, STE, and left-heart ventricle. Two investigators independently identified and included studies if they reported 2DSTE-derived LV GLS, GCS, or GRS. The weighted mean was estimated by using random effects models with 95% CIs, heterogeneity was assessed using the Cochran Q statistic and the inconsistency index (I(2)), and publication bias was evaluated using the Egger test. Effects of demographic (age), clinical, and vendor variables were assessed in a metaregression. RESULTS The search identified 2,325 children from 43 data sets. The reported normal mean values of GLS among the studies varied from -16.7% to -23.6% (mean, -20.2%; 95% CI, -19.5% to -20.8%), GCS varied from -12.9% to -31.4% (mean, -22.3%; 95% CI, -19.9% to -24.6%), and GRS varied from 33.9% to 54.5% (mean, 45.2%; 95% CI, 38.3% to 51.7%). Twenty-six studies reported longitudinal strain only from the apical four-chamber view, with a mean of -20.4% (95% CI, -19.8% to -21.7%). Twenty-three studies reported circumferential strain (mean, -20.3%; 95% CI, -19.4% to -21.2%) and radial strain (mean, 46.7%; 95% CI, 42.3% to 51.1%) from the short-axis view at the midventricular level. A significant apex-to-base segmental longitudinal strain gradient (P < .01) was observed in the LV free wall. There was significant between-study heterogeneity and inconsistency (I(2) > 94% and P < .001 for each strain measure), which was not explained by age, gender, body surface area, blood pressure, heart rate, frame rate, frame rate/heart rate ratio, tissue-tracking methodology, location of reported strain value along the strain curve, ultrasound equipment, or software. The metaregression showed that these effects were not significant determinants of variations among normal ranges of strain values. There was no evidence of publication bias (P = .40). CONCLUSIONS This study defines reference values of 2DSTE-derived LV strain in children on the basis of a meta-analysis. In healthy children, mean LV GLS was -20.2% (95% CI, -19.5% to -20.8%), mean GCS was -22.3% (95% CI, -19.9% to -24.6%), and mean GRS was 45.2% (95% CI, 38.3% to 51.7%). LV segmental longitudinal strain has a stable apex-to-base gradient that is preserved throughout maturation. Although variations among different reference ranges in this meta-analysis were not dependent on differences in demographic, clinical, or vendor parameters, age- and vendor-specific referenced ranges were established as well.
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Affiliation(s)
- Philip T Levy
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri; Department of Pediatrics, Goryeb Children's Hospital, Morristown, New Jersey.
| | - Aliza Machefsky
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Aura A Sanchez
- Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota
| | - Meghna D Patel
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Sarah Rogal
- Department of Pediatrics, Goryeb Children's Hospital, Morristown, New Jersey
| | - Susan Fowler
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Lauren Yaeger
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Angela Hardi
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
| | - Mark R Holland
- Department of Radiology, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana
| | - Aaron Hamvas
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Gautam K Singh
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri
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Cutler LS, Boccuzzi J, Yaeger L, Bottaro B, Christian CP, Martinez JR. Effects of reserpine treatment on beta-adrenergic/adenylate cyclase modulate secretion and resynthesis by the rat submandibular gland. Virchows Arch A Pathol Anat Histol 1981; 392:185-98. [PMID: 6269279 DOI: 10.1007/bf00430820] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Chronic reserpine (adrenergic blocking) treatment causes a marked accumulation of secretory protein in the rat submandibular gland (SMG) but discharge of this material is delayed in response to isoproterenol stimulation. The purposes of this study were to investigate the effects of chronic reserpine treatment on 1) the number of beta-adrenergic receptor. 2) the sensitivity of cell-surface-associated adenylate cyclase to various concentrations of isoproterenol, and 3) to correlate these data to morphologic studies of the secretion and resynthesis phases of the isoproterenol-induced secretory cycle in the rat SMG. Animals were injected with reserpine (0.5 microgram/g b.w.) for 6 days. Plasma membrane fractions were prepared. The adenylate cyclase response to a series of isoproterenol concentrations, and the number of beta-adrenergic receptors ([3H]-alprenolol binding) were determined. Other animals were given a single dose of isoproterenol (0.8 mg/100 g b.w.) and the SMG was examined by light and electron microscopy at various times (30 min to 24 h) after treatment. Chronic reserpine treatment leads to a 2.5-fold increase in SMG beta-adrenergic binding sites and a 50-fold increase in adenylate cyclase sensitivity to IPR stimulation when compared to controls. However, secretion and resynthesis of secretory product in response to IPR stimulation was greatly delayed in reserpinized rats.
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