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Berrios C, McBeth M, Bradley-Ewing A, Schuetz N, Campbell A, Talebizadeh Z, Garrett JR, Falicov T, Martinez F, Hurley EA. Developing a community-led rare disease ELSI research agenda. Orphanet J Rare Dis 2024; 19:23. [PMID: 38254122 PMCID: PMC10801933 DOI: 10.1186/s13023-023-02986-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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 11/18/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND Research priorities are best defined through engagement with communities who will be impacted by the research and have lived experience of the topics to be studied. We aimed to establish a pediatric rare disease community stakeholder group and empower them in (1) eliciting perspectives from affected families in the wider region and (2) synthesizing collective ideas into a research agenda focused on shared ethical, legal, and social implications (ELSI) across rare disease. METHODS This two-year project utilized a community-centered approach to engage rare disease community members as equal partners in developing a research agenda for ELSI in rare disease. We established "Rare Voices" (RV), a 22-member stakeholder group of patients, parents, clinicians and researchers. Following capacity-building trainings, RV designed and conducted listening sessions with teen patients and parents of children with rare diseases to explore challenges, positive experiences, and ethical concerns. Listening session findings were synthesized and contextualized into research topics, which RV members further refined and prioritized. We used established measures to assess RV member engagement and satisfaction. RESULTS From 14 listening sessions with parents (n = 52) and teen patients (n = 13), RV identified eight core research topics as most important for future rare disease research: coordinating care, communication, accessing resources and care, impact on family unit, community and support in society, mental health and identity, ethical aspects of care, and uncertainty. RV members were highly engaged throughout the two-year project and reported high levels of satisfaction with the experience and research agenda. CONCLUSIONS Through capacity-building and authentic engagement, this project resulted in a community-led rare disease research agenda to guide future rare disease ELSI research that aligns with patients' and families' priorities. An environment of equal partnership and respect created a space for mutual learning where community members were empowered to shape the research agenda based on their collective experiences. The agenda recognizes the shared psychosocial and healthcare experiences of rare disease and offers practical areas of research to address patient and family needs.
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Affiliation(s)
- Courtney Berrios
- Genomic Medicine Center, Children's Mercy Kansas City, Kansas City, MO, USA.
- University of Missouri Kansas City, Kansas City, MO, USA.
| | - Macy McBeth
- Genomic Medicine Center, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Andrea Bradley-Ewing
- Health Services and Outcomes Research, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Nikolaus Schuetz
- Health Services and Outcomes Research, Children's Mercy Kansas City, Kansas City, MO, USA
| | | | | | - Jeremy R Garrett
- University of Missouri Kansas City, Kansas City, MO, USA
- Bioethics Center, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Tamara Falicov
- University of Missouri Kansas City, Kansas City, MO, USA
| | - Francisco Martinez
- Office of Equity and Diversity, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Emily A Hurley
- University of Missouri Kansas City, Kansas City, MO, USA
- Health Services and Outcomes Research, Children's Mercy Kansas City, Kansas City, MO, USA
- Department of Population Health, Kansas University Medical Center, Kansas City, KS, USA
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Strenk ME, Berrios C, Garrett JR. Addressing the Burdens That Newborn Screening Imposes on Underserved Communities. Am J Bioeth 2023; 23:79-82. [PMID: 37339296 PMCID: PMC10389289 DOI: 10.1080/15265161.2023.2207542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Affiliation(s)
| | - Courtney Berrios
- Genomic Medicine Center, Children's Mercy
- University of Missouri Kansas City
| | - Jeremy R Garrett
- Children's Mercy - Kansas City
- University of Missouri Kansas City
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Garrett JR, Moskop JC, Parker JC. Against Multiplying Clinical Ethics Standards without Necessity: The Case for Parsimony in Evaluating Decision-making Capacity. Am J Bioeth 2022; 22:87-89. [PMID: 36332054 DOI: 10.1080/15265161.2022.2123994] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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Garrett JR. Does Anyone Need to Regulate Parental Access to Fetal Genetic Information? Am J Bioeth 2022; 22:28-30. [PMID: 35089830 DOI: 10.1080/15265161.2022.2015962] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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Garrett JR, McNolty LA. Principles over Propositions: Or, How to Reject Metaphysical Neutrality in Bioethics. Am J Bioeth 2021; 21:31-34. [PMID: 34036880 DOI: 10.1080/15265161.2021.1915412] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
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Abstract
The pandemic creates unprecedented challenges to society and to health care systems around the world. Like all crises, these provide a unique opportunity to rethink the fundamental limiting assumptions and institutional inertia of our established systems. These inertial assumptions have obscured deeply rooted problems in health care and deflected attempts to address them. As hospitals begin to welcome all patients back, they should resist the temptation to go back to business as usual. Instead, they should retain the more deliberative, explicit, and transparent ways of thinking that have informed the development of crisis standards of care. The key lesson to be learned from those exercises in rational deliberation is that justice must be the ethical foundation of all standards of care. Justice demands that hospitals take a safety-net approach to providing services that prioritizes the most vulnerable segments of society, continue to expand telemedicine in ways that improve access without exacerbating disparities, invest in community-based care, and fully staff hospitals and clinics on nights and weekends.
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Affiliation(s)
- Ian D Wolfe
- Children's Mercy Bioethics Center, Kansas City, Missouri
| | | | - Brian S Carter
- Children's Mercy Bioethics Center, Kansas City, Missouri
| | - John D Lantos
- Children's Mercy Bioethics Center, Kansas City, Missouri
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Abstract
The past decade has witnessed escalating legal and ethical challenges to the diagnosis of death by neurologic criteria (DNC). The legal tactic of demanding consent for the apnea test, if successful, can halt the DNC. However, US law is currently unsettled and inconsistent in this matter. Consent has been required in several trial cases in Montana and Kansas but not in Virginia and Nevada. In this paper, we analyze and evaluate the legal and ethical bases for requiring consent before apnea testing and defend such a requirement by appealing to ethical and legal principles of informed consent and battery and the right to refuse medical treatment. We conclude by considering and rebutting two major objections to a consent requirement for apnea testing: (1) a justice-based objection to allocate scarce resources fairly and (2) a social utility objection that halting the diagnosis of brain death will reduce the number of organ donors.
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Garrett JR, Berkowitz I. Response to Open Peer Commentaries "Rethinking the Ethical, Legal, and Clinical Foundations of Informed Consent and Shared Decision-Making for Brain Death Determination". Am J Bioeth 2020; 20:W1-W5. [PMID: 32441593 DOI: 10.1080/15265161.2020.1762796] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
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Garrett JR, Lantos JD, Biesecker LG, Childerhose JE, Chung WK, Holm IA, Koenig BA, McEwen JE, Wilfond BS, Brothers K. Rethinking the "open future" argument against predictive genetic testing of children. Genet Med 2019; 21:2190-2198. [PMID: 30894702 PMCID: PMC6754817 DOI: 10.1038/s41436-019-0483-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 02/27/2019] [Indexed: 02/07/2023] Open
Abstract
Professional consensus has traditionally discouraged predictive genetic
testing when no childhood interventions can reduce future morbidity or
mortality. However, advances in genome sequencing and accumulating evidence that
children and families cope adequately with predictive genetic information have
weakened this consensus. The primary argument remaining against testing appeals
to children’s “right to an open future.” It claims that the
autonomy of the future adult is violated when others make an irreversible choice
to obtain or disclose predictive genetic information during childhood. We
evaluate this argument and conclude that children’s interest in an open
future should not be understood as a right. Rather an open
future is one significant interest to weigh against other important interests
when evaluating decisions. Thus, predictive genetic testing is ethically
permissible in principle, as long as the interests promoted outweigh potential
harms. We conclude by offering an expanded model of children’s interests
that might be considered in such circumstances, and present two case analyses to
illustrate how this framework better guides decisions about predictive genetic
testing in pediatrics.
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Affiliation(s)
- Jeremy R Garrett
- Children's Mercy Bioethics Center, Children's Mercy Kansas City, Kansas City, MO, USA. .,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA.
| | - John D Lantos
- Children's Mercy Bioethics Center, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Leslie G Biesecker
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Janet E Childerhose
- Division of Pediatric Clinical and Translational Research, University of Louisville School of Medicine, Louisville, KY, USA
| | - Wendy K Chung
- Departments of Medicine and Pediatrics, Columbia University, New York, NY, USA
| | - Ingrid A Holm
- Division of Genetics and Genomics and the Manton Center for Orphan Diseases Research, and Department of Pediatrics, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA
| | - Barbara A Koenig
- UCSF Bioethics, University of California San Francisco, San Francisco, CA, USA
| | - Jean E McEwen
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Benjamin S Wilfond
- Treuman Katz Bioethics Center, Seattle Children's Research Institute, Seattle, WA, USA.,Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Kyle Brothers
- Department of Pediatrics, University of Louisville, Louisville, KY, USA
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Moore B, Garrett JR, McNolty LA, Murano MC. The Strange Tale of Three Identical Strangers: Cinematic Lessons in Bioethics. Hastings Cent Rep 2019; 49:21-23. [PMID: 30790311 DOI: 10.1002/hast.974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Tim Wardle's 2018 documentary film Three Identical Strangers is an exploration of identity, family, and loss. It's also about nature versus nurture and the boundaries of ethically permissible research, particularly research involving children. The film tells the story of identical triplets who were separated soon after birth in 1961. A different family adopted each boy, without being told that their son had two identical brothers. The adoption agency responsible for finding the families was collaborating with a group of researchers working on a study about … something. Three Identical Strangers details the boys' fight to obtain information about the study and for closure. But while the film may have received rave reviews, it left us feeling uneasy. We came away with two sets of questions, one having to do with the story that the film documents and the second with the ethics of filmmaking itself.
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Garrett JR. It's the Idiom, Stupid: A Plea for Formal Rhetorical Analysis in Bioethics. Am J Bioeth 2019; 19:67-69. [PMID: 31307356 DOI: 10.1080/15265161.2018.1546350] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Garrett JR. Prologomena to Any Future Pediatric Bioethics. Am J Bioeth 2018; 18:63-65. [PMID: 30133392 DOI: 10.1080/15265161.2018.1485778] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Shubkin CD, Garrett JR, Lantos JD. When Residents Let Conscience Be Their Guide: Professional Development and Educational Opportunity. Acad Pediatr 2018; 18:239-242. [PMID: 29269031 DOI: 10.1016/j.acap.2017.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 06/29/2017] [Revised: 11/05/2017] [Accepted: 12/10/2017] [Indexed: 11/26/2022]
Abstract
Residency is a time of professional identity formation. During this time, residents may first be exposed to conflicts between professional duties and personal beliefs which may lead to a request for a conscience-based exemption. Faculty, whether the supervising attending or the program director, have an important role in the professional and ethical development of residents by acknowledging and supporting residents as they encounter these potential conflicts. In this paper, we highlight three areas of unique issues that arise within the context of residency training programs when a resident makes a request to be excused from clinical duties based on personal conscience: namely, the maintenance of educational standards, the burdens that may be placed on colleagues, and the responsibility for faculty to foster the professional development of ethically sensitive pediatricians.
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Affiliation(s)
| | - Jeremy R Garrett
- Children's Mercy Bioethics Center, Children's Mercy Kansas City, Kansas City, Mo
| | - John D Lantos
- Children's Mercy Bioethics Center, Children's Mercy Kansas City, Kansas City, Mo
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Affiliation(s)
- N D Heaton
- Department of Surgery King's College Hospital, Denmark Hill, London SE5 8RX
| | - E R Howard
- Department of Surgery King's College Hospital, Denmark Hill, London SE5 8RX
| | - J R Garrett
- Department of Oral Pathology, King's College Hospital, Denmark Hill, London SE5 8RX
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Abstract
Facial transplantation has become a reality in adult medicine. Children are subject to congenital craniofacial differences, disease-related, traumatic, or thermochemical craniofacial changes and might be suitable for face transplantation. This manuscript addresses unique ethical issues in considering potential pediatric face transplant. These challenges are operant at the individual, technologic, and psychosocial level for clinicians, investigators, and society.
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Affiliation(s)
| | - Jeremy R Garrett
- Bioethics Center, Children's Mercy Hospital, Kansas City, MO, USA
| | - Brian S Carter
- Bioethics Center, Children's Mercy Hospital, Kansas City, MO, USA
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Garrett JR. The Poverty of Value Clarification: Using Ethical Theory to Critique and Transcend the "Givens" of Clinical Ethics Consultation. Am J Bioeth 2016; 16:48-51. [PMID: 27471943 DOI: 10.1080/15265161.2016.1196262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Jeremy R Garrett
- a Children's Mercy Hospital and University of Missouri-Kansas City
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22
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Affiliation(s)
- J R Garrett
- Department of Oral Pathology, King's College Hospital, London SE5 8RX
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23
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Green RC, Goddard KAB, Jarvik GP, Amendola LM, Appelbaum PS, Berg JS, Bernhardt BA, Biesecker LG, Biswas S, Blout CL, Bowling KM, Brothers KB, Burke W, Caga-Anan CF, Chinnaiyan AM, Chung WK, Clayton EW, Cooper GM, East K, Evans JP, Fullerton SM, Garraway LA, Garrett JR, Gray SW, Henderson GE, Hindorff LA, Holm IA, Lewis MH, Hutter CM, Janne PA, Joffe S, Kaufman D, Knoppers BM, Koenig BA, Krantz ID, Manolio TA, McCullough L, McEwen J, McGuire A, Muzny D, Myers RM, Nickerson DA, Ou J, Parsons DW, Petersen GM, Plon SE, Rehm HL, Roberts JS, Robinson D, Salama JS, Scollon S, Sharp RR, Shirts B, Spinner NB, Tabor HK, Tarczy-Hornoch P, Veenstra DL, Wagle N, Weck K, Wilfond BS, Wilhelmsen K, Wolf SM, Wynn J, Yu JH. Clinical Sequencing Exploratory Research Consortium: Accelerating Evidence-Based Practice of Genomic Medicine. Am J Hum Genet 2016; 98:1051-1066. [PMID: 27181682 DOI: 10.1016/j.ajhg.2016.04.011] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 04/14/2016] [Indexed: 12/11/2022] Open
Abstract
Despite rapid technical progress and demonstrable effectiveness for some types of diagnosis and therapy, much remains to be learned about clinical genome and exome sequencing (CGES) and its role within the practice of medicine. The Clinical Sequencing Exploratory Research (CSER) consortium includes 18 extramural research projects, one National Human Genome Research Institute (NHGRI) intramural project, and a coordinating center funded by the NHGRI and National Cancer Institute. The consortium is exploring analytic and clinical validity and utility, as well as the ethical, legal, and social implications of sequencing via multidisciplinary approaches; it has thus far recruited 5,577 participants across a spectrum of symptomatic and healthy children and adults by utilizing both germline and cancer sequencing. The CSER consortium is analyzing data and creating publically available procedures and tools related to participant preferences and consent, variant classification, disclosure and management of primary and secondary findings, health outcomes, and integration with electronic health records. Future research directions will refine measures of clinical utility of CGES in both germline and somatic testing, evaluate the use of CGES for screening in healthy individuals, explore the penetrance of pathogenic variants through extensive phenotyping, reduce discordances in public databases of genes and variants, examine social and ethnic disparities in the provision of genomics services, explore regulatory issues, and estimate the value and downstream costs of sequencing. The CSER consortium has established a shared community of research sites by using diverse approaches to pursue the evidence-based development of best practices in genomic medicine.
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Affiliation(s)
- Robert C Green
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Harvard Medical School, Boston, MA 02115, USA; Partners Personalized Medicine, Boston, MA 02139, USA.
| | - Katrina A B Goddard
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR 97227, USA
| | - Gail P Jarvik
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA; Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Laura M Amendola
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Paul S Appelbaum
- Department of Psychiatry, Columbia University Medical Center and New York State Psychiatric Institute, New York, NY 10032, USA
| | - Jonathan S Berg
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Barbara A Bernhardt
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Leslie G Biesecker
- Medical Genomics and Metabolic Genetics Branch, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Sawona Biswas
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Carrie L Blout
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Kevin M Bowling
- HudsonAlpha Institute for Biotechnology, Huntsville, AL 35806, USA
| | - Kyle B Brothers
- Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA
| | - Wylie Burke
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA; Department of Bioethics and Humanities, Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | | | - Arul M Chinnaiyan
- Michigan Center for Translational Pathology, Ann Arbor, MI 48109, USA; Comprehensive Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA; Departments of Pathology and Urology, University of Michigan, Ann Arbor, MI 48109, USA; Howard Hughes Medical Institute, Ann Arbor, MI 48109, USA
| | - Wendy K Chung
- Department of Pediatrics, Columbia University, New York, NY 10029, USA; Department of Medicine, Columbia University Medical Center, New York, NY 10032, USA
| | - Ellen W Clayton
- Center for Biomedical Ethics and Society, Vanderbilt University, Nashville, TN 37203, USA
| | - Gregory M Cooper
- HudsonAlpha Institute for Biotechnology, Huntsville, AL 35806, USA
| | - Kelly East
- HudsonAlpha Institute for Biotechnology, Huntsville, AL 35806, USA
| | - James P Evans
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Stephanie M Fullerton
- Department of Bioethics and Humanities, Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | - Levi A Garraway
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Department of Medical Oncology and Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02115, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Jeremy R Garrett
- Children's Mercy Bioethics Center, Children's Mercy Hospital, Kansas City, MO 64108, USA; Departments of Pediatrics and Philosophy, University of Missouri - Kansas City, Kansas City, MO 64110, USA
| | - Stacy W Gray
- Harvard Medical School, Boston, MA 02115, USA; Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Gail E Henderson
- Department of Social Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Lucia A Hindorff
- Division of Genomic Medicine, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Ingrid A Holm
- Harvard Medical School, Boston, MA 02115, USA; Division of Genetics and Genomics and the Manton Center for Orphan Diseases Research, Boston Children's Hospital, Boston, MA 02115, USA
| | | | - Carolyn M Hutter
- Division of Genomic Medicine, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Pasi A Janne
- Harvard Medical School, Boston, MA 02115, USA; Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Steven Joffe
- Department of Medical Ethics & Health Policy, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - David Kaufman
- Division of Genomics and Society, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Bartha M Knoppers
- Centre of Genomics and Policy, Faculty of Medicine, Department of Human Genetics, McGill University, Montreal, QC H3A 1B1, Canada
| | - Barbara A Koenig
- Institute for Health and Aging, University of California, San Francisco, San Francisco, CA 94118, USA
| | - Ian D Krantz
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Pediatrics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Teri A Manolio
- Division of Genomic Medicine, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Laurence McCullough
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jean McEwen
- Division of Genomics and Society, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Amy McGuire
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, Houston, TX 77030, USA
| | - Donna Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Richard M Myers
- HudsonAlpha Institute for Biotechnology, Huntsville, AL 35806, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Jeffrey Ou
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Donald W Parsons
- Baylor College of Medicine and Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Gloria M Petersen
- Department of Health Sciences Research, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Sharon E Plon
- Baylor College of Medicine and Texas Children's Cancer Center, Houston, TX 77030, USA
| | - Heidi L Rehm
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Harvard Medical School, Boston, MA 02115, USA; Partners Personalized Medicine, Boston, MA 02139, USA; Laboratory for Molecular Medicine, Partners HealthCare, Cambridge, MA 02139, USA
| | - J Scott Roberts
- Department of Health Behavior & Health Education, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
| | - Dan Robinson
- Michigan Center for Translational Pathology, Ann Arbor, MI 48109, USA
| | - Joseph S Salama
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; Clinical Sequencing Exploratory Research Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Sarah Scollon
- Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Richard R Sharp
- Biomedical Ethics Research Program, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Brian Shirts
- Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA
| | - Nancy B Spinner
- Division of Translational Medicine and Human Genetics, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Holly K Tabor
- Department of Pediatrics and Seattle Children's Research Institute, University of Washington, Seattle, WA, USA
| | - Peter Tarczy-Hornoch
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA; University of Washington, Seattle, WA 98105, USA
| | - David L Veenstra
- Department of Pharmacy, University of Washington, Seattle, WA 98195, USA
| | - Nikhil Wagle
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Department of Medical Oncology and Center for Cancer Precision Medicine, Dana-Farber Cancer Institute, Boston, MA 02115, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Karen Weck
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Benjamin S Wilfond
- Department of Pediatrics and Seattle Children's Research Institute, University of Washington, Seattle, WA, USA
| | - Kirk Wilhelmsen
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Susan M Wolf
- Law School, Medical School, and Consortium on Law and Values in Health, Environment, & the Life Sciences, Minneapolis, University of Minnesota, MN 55455, USA
| | - Julia Wynn
- Department of Pediatrics, Columbia University, New York, NY 10029, USA
| | - Joon-Ho Yu
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
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Lantos JD, Caciki J, Garrett JR. One Exemption Too Many: The Case for Mandated CCHD Screening. Am J Bioeth 2016; 16:3-5. [PMID: 26734734 DOI: 10.1080/15265161.2016.1128750] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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McNolty LA, Garrett JR. For Whom the Burden Tolls: Gender and the Unequal Management of Fetal Risks and Parental Expectations. Am J Bioeth 2016; 16:17-19. [PMID: 26832083 DOI: 10.1080/15265161.2015.1120811] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
| | - Jeremy R Garrett
- b Children's Mercy Bioethics Center and University of Missouri-Kansas City
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Abstract
Many bioethicists view the primary task of bioethics as 'value clarification'. In this article, I argue that the field must embrace two more ambitious agendas that go beyond mere clarification. The first agenda, critique, involves unmasking, interrogating, and challenging the presuppositions that underlie bioethical discourse. These largely unarticulated premises establish the boundaries within which problems can be conceptualized and solutions can be imagined. The function of critique, then, is not merely to clarify these premises but to challenge them and the boundaries they define. The second agenda, integration, involves honoring and unifying what is right in competing values. Integration is the morally ideal response to value conflict, offering the potential for transcending win/lose outcomes. The function of integration, then, is to envision actions or policies that not only resolve conflicts, but that do so by jointly realizing many genuine values in deep and compelling ways. My argument proceeds in stages. After critically examining the role and dominant status of value clarification in bioethical discourse, I describe the nature and value of the two agendas, identify concrete examples of where each has been and could be successful, and explain why a critical integrative bioethics--one that appreciates the joint necessity and symbiotic potential of the two agendas--is crucial to the future of the field. The ultimate goal of all of this is to offer a more compelling vision for how bioethics might conduct itself within the larger intellectual and social world it seeks to understand and serve.
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Beck JC, Smith LD, Gordon BG, Garrett JR. An ethical framework for responding to drug shortages in pediatric oncology. Pediatr Blood Cancer 2015; 62:931-4. [PMID: 25732614 DOI: 10.1002/pbc.25461] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 11/05/2014] [Accepted: 01/16/2015] [Indexed: 12/15/2022]
Abstract
The frequency of drug shortages has increased considerably over the last decade. Important ethical issues arise whenever the supply of an effective drug is insufficient to meet demand. Using the ethical principles of beneficence, non-maleficence, and justice, institutions can guide prioritization of drug distribution before a shortage occurs to avoid unfair and unethical distribution of resources. This analysis will give a historical context for drug shortages, identify, and explore the central ethical concerns raised by drug shortages, and propose an ethical framework for addressing them in the context of pediatric oncology.
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Affiliation(s)
- Jill C Beck
- University of Nebraska Medical Center, Omaha, Nebraska
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Abstract
Bioethicists invoke a duty to rescue in a wide range of cases. Indeed, arguably, there exists an entire medical paradigm whereby vast numbers of medical encounters are treated as rescue cases. The intuitive power of the rescue paradigm is considerable, but much of this power stems from the problematic way that rescue cases are conceptualized-namely, as random, unanticipated, unavoidable, interpersonal events for which context is irrelevant and beneficence is the paramount value. In this article, I critique the basic assumptions of the rescue paradigm, reframe the ethical landscape in which rescue obligations are understood, and defend the necessity and value of a wider social and institutional view. Along the way, I move back and forth between ethical theory and a concrete case where the duty to rescue has been problematically applied: the purported duty to regularly return incidental findings and individual research results in genomic and genetic research.
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Affiliation(s)
- Jeremy R Garrett
- a Children's Mercy Bioethics Center and University of Missouri-Kansas City
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Plantz DM, Garrett JR, Carter B, Knackstedt AD, Watkins VS, Lantos J. Engaging Pediatric Health Professionals in Interactive Online Ethics Education. Hastings Cent Rep 2014; 44:15-20. [DOI: 10.1002/hast.383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Whether researchers have an obligation to disclose secondary genetic research findings, and, if so, in what circumstances, remains a matter of heated debate. This paper suggests that much of this confusion is definitional or conceptual in nature. That is, there is significant variability in the way that threshold terms and concepts such as "incidental," "analytic validity," "clinical validity," "clinical relevance," "clinical utility," "clinical significance," and "actionability," are used in the literature, which is impeding efforts to clarify the scope of an obligation to return findings. This paper analyzes the definitional muddle underlying the debate about returning genetic research findings, first, to explain the range of definitions being used in this debate. We go on to propose that, underlying all the seeming confusion and disagreement, three central and widely agreed upon concepts are at work in this debate - validity, value, and volition. Refocusing attention on these core concepts, and their appropriate conceptualizations, can produce a more productive debate regarding the return of genetic research findings.
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Affiliation(s)
- Lisa Eckstein
- Lecturer in law and medicine in the Faculty of Law at the University of Tasmania
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Abstract
Children's well-being has become the focal consideration in legal and public policy debates regarding same-sex marriage. In this article, we critically examine and rebut the central moral argument made by opponents of same-sex marriage: that the state should not license any domestic arrangement other than "traditional marriage" because doing so would be detrimental to children's well-being. Although many have challenged the empirical premise that children raised by same-sex couples fare worse than children in other arrangements, we focus primarily on the normative premises for exclusively licensing traditional (that is, monogamous, heterosexual) marriage. We argue that even if the empirical support for its claims was strong, the argument is morally insufficient for denying state recognition to other types of relationships. Importantly, we affirm the state's vital role in promoting children's well-being. We question, however, the approach of delegitimizing certain relationships as a means to that end. Instead, we argue, the state should encourage and support individuals who want to care for children, presume that any couple or individual is capable of adequate child-rearing, and ensure that all adults who are raising children (whether married or not) have the material resources and support necessary to be good parents. Such a policy would (1) set a reasonable minimal threshold for state recognition, (2) be vigilant in identifying cases falling below this threshold, and then (3) either assist or disqualify underperforming arrangements. It would also, appropriately, decouple arguments about legitimate and illegitimate types of relationships from arguments about what is best for children.
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Affiliation(s)
- Jeremy R Garrett
- Children's Mercy Bioethics Center, Children's Mercy Hospital, Kansas City, MO 64108, USA.
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Affiliation(s)
- Jeremy R Garrett
- Children’s Mercy Bioethics Center, Children’s Mercy Hospital, 2401 Gillham Rd., Kansas City, MO 64108, USA.
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Affiliation(s)
- Jeremy R Garrett
- Children's Mercy Bioethics Center, Children's Mercy Hospital, 2401 Gillham Road, Kansas City, MO 64108, USA.
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Affiliation(s)
- Jeremy R Garrett
- Children's Mercy Bioethics Center, Children’s Mercy Hospital, Kansas City, MO 64108, USA.
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Garrett JR, Howard ER. Myenteric plexus of the hind-gut: developmental abnormalities in humans and experimental studies. Ciba Found Symp 2008; 83:326-54. [PMID: 6913488 DOI: 10.1002/9780470720653.ch16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Intraluminal pressure studies on patients with congenital aganglionosis showed that the aganglionic rectum contracted in an uncoordinated manner and failed to relax. Histochemical assessment of the innervation helped to explain the variable severity of the symptoms in this condition. It is concluded that (1) absence of ganglia prevents normal coordinated peristalsis and creates an obstructive element; (2) absence of reflex relaxation adds to the obstruction; (3) the degree of uncoordinated motor activity in distal aganglionic bowel probably relates to the number of cholinesterase-positive nerves in the circular muscle and adds another variable obstructive element; and (4) deficient innervation of distal ganglionic bowel probably creates a poor propulsive force and so accentuates more distal obstructive factors. Neurohistochemical and functional studies in the anorectum of cats reveal a somewhat different innervation pattern from that in humans but show that sphincteric tone is mainly due to alpha-adrenergic neural activity. Reflex relaxation of the internal anal sphincter is a complex function in which inhibitory responses override motor responses, and it involves an important non-adrenergic non-cholinergic component. The role of cholinergic nerves in the sphincter remains uncertain. Neurohistochemical assessment of full thickness biopsy specimens of rectal muscle from patients with disabling constipation shows that developmental neuronal dysplasias of the hind-gut may be divided into three main categories: (1) aganglionosis (Hirschsprung's disease), (2) hypoganglionosis and (3) hyperganglionosis, and that the different neuronal elements may be affected to differing degrees in individuals within each group. Resection of the aganglionic bowel is required in congenital aganglionosis but the combined diagnostic-therapeutic procedure of anorectal myotomy has been found beneficial in patients with hypoganglionosis.
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Carpenter GH, Proctor GB, Garrett JR. Preganglionic parasympathectomy decreases salivary SIgA secretion rates from the rat submandibular gland. J Neuroimmunol 2005; 160:4-11. [PMID: 15710452 DOI: 10.1016/j.jneuroim.2004.10.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2004] [Revised: 10/20/2004] [Accepted: 10/20/2004] [Indexed: 10/26/2022]
Abstract
Immunoglobulin A (IgA) is transported into saliva by salivary cells expressing the polymeric immunoglobulin receptor (pIgR). In rat salivary glands, autonomic nerves stimulate this process. To examine how nerves affect pIgR-mediated IgA secretion, the chorda-lingual nerve was sectioned. One week after preganglionic parasympathectomy, both the stimulated and unstimulated rates of salivary IgA secretion were reduced, despite similar glandular amounts of IgA. Biochemical analysis of cells from parasympathectomised and control glands indicated reduced membrane expression of pIgR. It appears the removal of long-term parasympathetic input has affected the routing of pIgR within salivary cells and reduced the SIgA transport into saliva.
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Affiliation(s)
- G H Carpenter
- Salivary Research Group, Division Oral Medicine, Guy's King's and St Thomas' School of Dentistry, United Kingdom.
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Proctor GB, Garrett JR, Carpenter GH, Ebersole LE. Salivary secretion of immunoglobulin A by submandibular glands in response to autonomimetic infusions in anaesthetised rats. J Neuroimmunol 2003; 136:17-24. [PMID: 12620639 DOI: 10.1016/s0165-5728(02)00466-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Salivary secretion of immunoglobulin A (lgA) by submandibular glands is increased by stimuli from autonomic nerves. Since it is unclear which specific autonomic receptors transduce such stimuli, we have infused autonomimetics intravenously and compared secretion of fluid, IgA and stored proteins (peroxidase and total protein) with secretory responses during electrical stimulation of the parasympathetic nerve supply in anaesthetized rats. The greatest secretion of IgA was evoked by the alpha-adrenoceptor agonist phenylephrine and this was reduced by the beta-adrenoceptor blocking drug propranolol. The secretion of fluid or proteins but not IgA was increased with frequency of nerve stimulation and dose of methacholine (cholinergic), isoprenaline (beta-adrenergic) or phenylephrine (alpha-adrenergic).
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MESH Headings
- Adrenergic Agonists/pharmacology
- Adrenergic Antagonists/pharmacology
- Adrenergic alpha-Agonists/pharmacology
- Adrenergic beta-Agonists/pharmacology
- Adrenergic beta-Antagonists/pharmacology
- Animals
- Autonomic Pathways/drug effects
- Autonomic Pathways/physiology
- Cholinergic Antagonists/pharmacology
- Dose-Response Relationship, Drug
- Electric Stimulation
- Immunoglobulin A/metabolism
- Male
- Parasympathetic Fibers, Postganglionic/drug effects
- Parasympathetic Fibers, Postganglionic/physiology
- Rats
- Rats, Wistar
- Receptors, Adrenergic, alpha/drug effects
- Receptors, Adrenergic, alpha/immunology
- Receptors, Adrenergic, alpha/metabolism
- Receptors, Adrenergic, beta/drug effects
- Receptors, Adrenergic, beta/immunology
- Receptors, Adrenergic, beta/metabolism
- Submandibular Gland/immunology
- Submandibular Gland/innervation
- Submandibular Gland/metabolism
- Sympathetic Fibers, Postganglionic/drug effects
- Sympathetic Fibers, Postganglionic/physiology
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Affiliation(s)
- G B Proctor
- Salivary Research Group, Unit, Guy's, King's and St. Thomas' School of Dentistry, The Rayne Institute, 123 Coldharbour Lane, London SE5 9NU, UK.
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Proctor GB, Carpenter GH, Segawa A, Garrett JR, Ebersole L. Constitutive secretion of immunoglobulin A and other proteins into lumina of unstimulated submandibular glands in anaesthetised rats. Exp Physiol 2003; 88:7-12. [PMID: 12525850 DOI: 10.1113/eph8802438] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 11/08/2022]
Abstract
Salivary fluid secretion is dependent upon reflex stimuli mediated by autonomic nerves. In order to determine if immunoglobulin A (IgA) and salivary proteins are secreted in the absence of nerve stimulation, small volumes (< 2 microl) of saliva were consecutively collected from the submandibular duct of anaesthetised rats following rest pauses in order to sample the protein contents of the ductal system. Within the first 5 microl of such saliva collected by parasympathetic nerve stimulation, IgA and other salivary proteins reached peak concentrations that were over 20-fold greater than levels in parasympathetically stimulated saliva subsequently collected during a 5 min period of stimulation. Confocal microscopy of TRITC-labelled IgA added to live, acutely isolated submandibular acini indicated that it did not enter the lumina by paracellular leakage. IgG is thought to enter saliva by paracellular leakage but did not accumulate in luminal saliva in the present study. Electrophoresis suggested that the major proteins secreted in the absence of stimulation were the same as those present in subsequently stimulated saliva. It can be concluded that IgA and other major submandibular proteins are secreted into glandular lumina in the absence of nerve stimulation. The functional significance of such unstimulated protein secretion is at present unclear.
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Affiliation(s)
- G B Proctor
- Salivary Research Group, Guy's, King's and St Thomas' School of Dentistry, The Rayne Institute, 123 Coldharbour Lane, London SE5 9NU, UK.
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Thomopoulos GN, Garrett JR, Proctor GB. Ultrastructural histochemical studies of secretory granule replenishment in rat submandibular granular tubules after cyclocytidine-induced secretion. J Submicrosc Cytol Pathol 2002; 34:279-89. [PMID: 12408361] [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: 02/27/2023]
Abstract
Rat submandibular glands have been examined electron microscopically at various times after degranulating the granular tubules by injecting cyclocytidine (75 mg/kg i.p.), to study events in the reformation of secretory granules in these cells. The changes were progressive but not synchronous in the cells. The first evidence of recovery was the re-appearance of glycogen particles 6 h after injection. Residual secretory granules were small and located periluminally at that time. More granules were present at 15 h after injection but they were still small and placed periluminally. There was more glycogen in the cells and some was present in aggregates. At 1 day after injection there were more secretory granules and they tended to be larger than previously. The secretory granules increased in size and number progressively thereafter and the cells appeared like normal controls by day 7. During the recovery, fusion profiles were seen between granules from 2 days onwards. Throughout, few Golgi complexes were detected and this may be related with the low glycosylation of the secretory proteins in these cells. The results confirm that the reformation of the secretory granules in granular tubule cells is a slow process that involves fusions of smaller granules.
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Affiliation(s)
- G N Thomopoulos
- Department of Biology, Aristotle University, School of Sciences, Thessaloniki, Greece.
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Harrison JD, Fouad HM, Garrett JR. Variation in the response to ductal obstruction of feline submandibular and sublingual salivary glands and the importance of the innervation. J Oral Pathol Med 2001; 30:29-34. [PMID: 11140897 DOI: 10.1034/j.1600-0714.2001.300105.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/23/2022]
Abstract
A variable response following ductal ligation of feline salivary glands corresponds to the human condition but contrasts with a predictable atrophy in obstructed salivary glands of rodents popularly used as a model for human salivary problems. The present investigation is concerned with a possible reason for the variable response, namely the preservation of the innervation. Ducts of feline submandibular and sublingual salivary glands were ligated with or without the inclusion of the chorda tympani. Inclusion led to a delayed initial response followed by progressive atrophy until the parenchyma was extremely atrophic, whereas avoidance of the chorda led to the variable response in which variable numbers of acini of a similar form to normal persisted. The results establish the atrophic effect of inclusion of the chorda tympani in ductal ligation and indicate the caution that should be exercised in the extrapolation of the rodent model to the human condition.
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Affiliation(s)
- J D Harrison
- Department of Oral Pathology, Guy's, King's and St Thomas's Dental Institute, London, England
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Abstract
Twenty-nine parotids ligated for between 1 and 365 days were examined by light and electron microscopy. Major changes in the acini were seen at 4 days and included vacuolation, disintegration, extravasation, apoptosis, phagy and a reduction in number and size of secretory granules. There was a further reduction in secretory granules from 7 to 12 days, but acinar cells persisted even up to 365 days, some contained a luminal concentration of small secretory granules and occasionally acinar cells of a similar appearance to normal were found. These findings contrast with a reported absence of acinar cells from the obstructed parotid of rat and show that parotid acinar cells are able to persist and retain an appearance indicative of secretory activity.
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Affiliation(s)
- J D Harrison
- Department of Oral Pathology, The Rayne Institute, Guy's, King's and St Thomas's Dental Institute, 123 Coldharbour Lane, SE5 9NU, London, UK
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Proctor GB, Carpenter GH, Garrett JR. Sympathetic decentralization abolishes increased secretion of immunoglobulin A evoked by parasympathetic stimulation of rat submandibular glands. J Neuroimmunol 2000; 109:147-54. [PMID: 10996216 DOI: 10.1016/s0165-5728(00)00316-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Salivary secretion of immunoglobulin A (IgA) in response to electrical stimulation of the parasympathetic nerve supply was assessed bilaterally in the submandibular glands of anaesthetized rats 1 week following unilateral pre-ganglionic sympathectomy (decentralization). Nerve-mediated stimulation on the non-denervated side increased IgA secretion several fold above an unstimulated rate of secretion whereas sympathetic decentralization reduced the parasympathetically stimulated secretion of IgA without affecting the basal rate. Glandular levels of IgA were increased following decentralization compared to the control glands. Salivary levels of free secretory component (FSC), the cleaved polymeric immunoglobulin receptor (plgR), were increased by parasympathetic stimulation and reduced by sympathectomy, though not as much as IgA. The decreased secretion of FSC suggests a reduced production of plgR and may account in part, for reduced IgA secretion following long-term removal of sympathetic nerve impulses.
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Affiliation(s)
- G B Proctor
- Secretory and Soft Tissue Research Unit, Guy's, King's and St Thomas' School of Dentistry, The Rayne Institute, 123 Coldharbour Lane, SE5 9NU, London, UK.
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Proctor GB, Carpenter GH, Anderson LC, Garrett JR. Nerve-evoked secretion of immunoglobulin A in relation to other proteins by parotid glands in anaesthetized rat. Exp Physiol 2000; 85:511-8. [PMID: 11038402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Secretion of fluid and proteins by salivary cells is under the control of parasympathetic and sympathetic autonomic nerves. In a recent study we have shown that, in the rat submandibular gland, autonomic nerves can also increase the secretion of IgA, a product of plasma cells secreted into saliva as SIgA (IgA bound to Secretory Component, the cleaved poly-immunoglobulin receptor). The present study aimed to determine if parotid secretion of SIgA is increased by autonomic nerves and to compare SIgA secretion with other parotid proteins stored and secreted by acinar and ductal cells. Assay of IgA in saliva evoked by parasympathetic nerve stimulation immediately following an extended rest period under anaesthesia indicated that it had been secreted into intraductal saliva in the absence of stimulation during the rest period. The mean rate of unstimulated IgA secretion (2.77+/-0.28 microg min(-1) g(-1)) and the 2.5-fold increase in IgA secretion evoked by parasympathetic stimulation were similar to results found previously in the rat submandibular gland. Sympathetic nerve stimulation increased SIgA secretion 2.7-fold, much less than in the submandibular gland. SDS-PAGE and Western blot analysis with anti-IgA and anti-Secretory Component antibodies confirmed that SIgA was the predominant form of IgA in saliva. Acinar-derived amylase and ductal-derived tissue kallikrein were more profoundly increased by parasympathetic and particularly sympathetic stimulation than SIgA. Overall, the results of the present study indicate that SIgA forms a prominent component of unstimulated parotid salivary protein secretion and that its secretion is similarly increased by stimulation of either autonomic nerve supply. The secretion of other parotid salivary proteins that are synthesized and stored by acinar or ductal cells is upregulated to a much greater extent by parasympathetic and particularly sympathetic stimulation.
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Affiliation(s)
- G B Proctor
- Secretory and Soft Tissue Research Unit, Guy's, King's and St Thomas' School of Dentistry, The Rayne Institute, 123 Coldharbour Lane, London SE5 9NU, UK.
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Matsuo R, Garrett JR, Proctor GB, Carpenter GH. Reflex secretion of proteins into submandibular saliva in conscious rats, before and after preganglionic sympathectomy. J Physiol 2000; 527 Pt 1:175-84. [PMID: 10944180 PMCID: PMC2270057 DOI: 10.1111/j.1469-7793.2000.00175.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
1. An indwelling catheter was placed in the left submandibular duct of rats, under pentobarbitone anaesthesia, and connected to an outflow cannula that emerged above the skull. 2. Saliva was collected from the outflow cannula in conscious rats, the same day after recovery from anaesthesia, under four different reflex conditions: grooming, heat exposure, rejection of a bitter tasting substance and feeding on softened chow, repeated in different orders. 3. Saliva flow was greatest for grooming and least for rejection. Protein concentrations were least with heat but much greater and similar for the other stimulations. Acinar peroxidase activity was high for feeding, intermediate for grooming and rejection, and again lowest with heat. Tubular tissue kallikrein activities were moderately low, being greatest with feeding and least with grooming. Secretory immunoglobulin A (SIgA) concentration was least with heat and similar for the other stimulations. 4. The next day, under pentobarbitone anaesthesia, the left preganglionic sympathetic trunk was sectioned (sympathetic decentralization) and, after recovery, the preceding stimulations were repeated. Flow of saliva showed little change, but protein and peroxidase concentrations and outputs decreased dramatically with grooming, rejection and feeding to levels similar to those with heat, which showed little change. Tissue kallikrein was lowered less dramatically, but the reductions in output were significant except with heat. Patterns of proteins resolved by electrophoresis changed for grooming, rejection and feeding and became similar to saliva from heat, which showed little change. No significant effects on SIgA concentrations occurred. 5. Gland weights from the sympathetically decentralized side were greater than from the intact side at the end of the experiments and histologically showed retention of acinar mucin. 6. Thus reflex sympathetic drive varied with the different stimulations; it was least during heat, but it had pronounced effects on acinar secretion of proteins during the other stimulations. At the same time this sympathetic drive had less impact on tissue kallikrein secretion from tubules and had little influence on flow or the concentration of SIgA secreted.
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Affiliation(s)
- R Matsuo
- Department of Oral Physiology, Okayama University Dental School, Japan
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Carpenter GH, Proctor GB, Anderson LC, Zhang XS, Garrett JR. Immunoglobulin A secretion into saliva during dual sympathetic and parasympathetic nerve stimulation of rat submandibular glands. Exp Physiol 2000; 85:281-6. [PMID: 10825415] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Salivary secretion of proteins from rat submandibular glands was studied using graded stimulation of the parasympathetic nerve in isolation, and then at a fixed rate in combination with graded sympathetic nerve stimulation. Increasing the frequency of parasympathetic nerve stimulation per se caused a gradual increase in the secretion of peroxidase (from acini) but only small increases in proteinase (from ductal cells) and IgA outputs. Dual stimulations, with an increasing frequency of sympathetic nerve stimulation on a background of low frequency parasympathetic nerve stimulation, showed that maximal acinar secretion of peroxidase required only a low frequency of additional sympathetic stimulation, whereas ductal secretion of kallikrein was greatest with the highest frequency of additional sympathetic stimulation (20 Hz in bursts). IgA secretion also required high frequency additional sympathetic stimulation in bursts for greatest output. Although a synergism occurred with parasympathetic plus sympathetic nerve stimulation for the secretion of both peroxidase and kallikrein it was not evident for the secretion of IgA. This presumably reflects a difference for exocytosis of proteins stored in granules (e.g. peroxidase and kallikrein) compared to those proteins continuously transported across the plasma membrane in vesicles by transcytosis. This work confirms that vesicular movement of secretory IgA can be increased by both parasympathetic and sympathetic nerve stimulation, but the frequency parameters differ for each nerve.
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Affiliation(s)
- G H Carpenter
- Secretory and Soft Tissue Research Unit, Department of Oral Pathology, GKT School of Dentistry, Rayne Institute, 123 Coldharbour Lane, London SE5 9NU, UK.
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Thomopoulos GN, Garrett JR, Proctor GB. Ultrastructural histochemical studies of secretory processes in rat submandibular granular tubules during intermittent sympathetic nerve stimulation. Eur J Morphol 2000; 38:69-79. [PMID: 10694903 DOI: 10.1076/0924-3860(200004)38:2;1-f;ft069] [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] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Secretory changes in the cells of granular tubules in rat submandibular glands have been studied sequentially during electrical stimulation of their sympathetic nerves. Results were assessed in a series of biopsied lobes from the same gland, taken at different times during the sympathetic stimulation. Changes were not synchronous between adjacent cells and it appeared that the time for the onset of secretory events differed between cells but, once set in action, a chain of similar events occurred. Nevertheless, some cells appeared to remain refractory throughout. Initially, some alignment of granules to the adjacent plasma membrane occurred and occasional evidence for classical exocytosis was seen. However, from early on microvesicles appeared in more luminally located granule membranes and were associated with granule fusions, that became common and led to the formation of large irregular aggregates. Most of the secretion of granule contents appeared to be through openings of aggregates into lumina. With granule fusions the intra-membrane microvesicles became internalised and tended to increase in size with time; they were commonly expelled with the contents of the aggregates. Fragments of cytoplasm also became incorporated in aggregate formation. Cytoplasm, often containing glycogen, also formed luminal blebs over some granular tubule cells and appeared to pass into the secretion by an apocrine process. At the end of stimulation multivesicular bodies were seen in association with redundant aggregates.
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Affiliation(s)
- G N Thomopoulos
- School of Sciences, Department of Biology, Aristotle University, Thessaloniki, Greece
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Abstract
1. The influence of sympathetic and parasympathetic nerve stimulations on salivary secretion of immunoglobulin A (IgA) was studied in the submandibular glands of anaesthetized rats by stimulating the nerve supplies with bipolar electrodes. 2. Although the flow of saliva from sympathetically stimulated glands was only 23% of that from parasympathetically stimulated glands the output of IgA was over 2-fold greater. This difference was attributable to influences of the nerves on IgA secretion through the epithelial cell polymeric immunoglobulin receptor-mediated pathway, as Western blotting with specific antibodies to IgA and secretory component revealed that secretory IgA (SIgA) dominated in all saliva samples. 3. Study of saliva secreted in sequential periods of nerve stimulation or following rest pauses suggested that SIgA secretion occurred in the absence of stimulation but this was upregulated 2.6- and 6-fold by parasympathetic and sympathetic nerve stimulations, respectively, compared with the calculated unstimulated rate. 4. The IgA content of extensively stimulated glands was 77% of levels in unstimulated contralateral control glands despite a secretion into saliva equivalent to almost 90% of the glandular IgA content. The IgA may be synthesized and secreted by glandular plasma cells at a rate which exceeds demand and/or such synthesis may be upregulated by nerve impulses. 5. The results indicate that salivary secretion of SIgA is upregulated by nerve impulses and that sympathetic nerves induce a greater effect than parasympathetic nerves.
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Affiliation(s)
- G H Carpenter
- Secretory and Soft Tissue Research Unit, King's College School of Medicine and Dentistry, 123 Coldharbour Lane, London SE5 9NU, UK
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Garrett JR, Proctor GB, Zhang XS, Anderson LC, Shori DK. Constitutive secretion of kallikreins in vivo from rat submandibular glands. Eur J Morphol 1998; 36 Suppl:86-91. [PMID: 9825899] [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: 02/09/2023]
Abstract
In parasympathetic saliva from rat submandibular glands the relative proportions of the various tissue kallikreins differ from those in sympathetic saliva. Kallikreins in sympathetic saliva arise from exocytosis of prepackaged granules in granular tubules, so the kallikreins in parasympathetic saliva must come from a non-granular pool, and are likely to be secreted through a constitutive vesicular route. During periods devoid of stimulation in anaesthetised rats, the kallikreins have been found to accumulate progressively in glandular lumina in parasympathetic-like proportions. As this transport of kallikrein into lumina occurs continuously in vivo, independently of any stimulation or any secretion of fluid, it must arise by constitutive vesicular secretion. During parasympathetic stimulation, the kallikreins are secreted into the saliva at a greater rate than in the resting state but their proportions remain the same and the means by which this increase occurs is open to debate. Constitutively secreted true tissue kallikrein (rK1) has been found to have a different molecular form from that in secretory granules. The submandibular glands also contribute to the kallikreins normally circulating in the blood. Serum levels of kallikrein increased equally during either parasympathetic or sympathetic stimulation and were independent of the amounts secreted into the saliva, so are likely to have arisen from constitutive secretion via the basal sides of the cells, morphological evidence for which has been found in the mouse (Penschow & Coghlan, 1993).
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Affiliation(s)
- J R Garrett
- Dept. Oral Pathology, King's College School of Medicine & Dentistry, London, UK
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