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Harris AR, McGivern P, Gilbert F, Van Bergen N. Defining Biomarkers in Stem Cell-Derived Tissue Constructs for Drug and Disease Screening. Adv Healthc Mater 2024:e2401433. [PMID: 38741544 DOI: 10.1002/adhm.202401433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 04/24/2024] [Indexed: 05/16/2024]
Abstract
The development of stem cell-derived tissue constructs (SCTCs) for clinical applications, including regenerative medicine, drug and disease screening offers significant hope for detecting and treating intractable disorders. SCTCs display a variety of biomarkers that can be used to understand biological mechanisms, assess drug interactions, and predict disease. Although SCTCs can be derived from patients and share the same genetic make-up, they are nevertheless distinct from human patients in many significant ways, which can undermine the clinical significance of measurements in SCTCs. This study defines biomarkers, how they apply to SCTCs, and clarifies specific ethical issues associated with the use of SCTCs for drug and disease screening.
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Affiliation(s)
- Alexander R Harris
- Department of Biomedical Engineering, University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Patrick McGivern
- School of Humanities and Social Inquiry, University of Wollongong, Wollongong, NSW, 2522, Australia
| | - Frederic Gilbert
- School of Humanities, University of Tasmania, Hobart, Tasmania, Australia
| | - Nicole Van Bergen
- Brain and Mitochondrial Research Group, Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, VIC, 3002, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, VIC, 3002, Australia
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Trappes R. Individual differences, uniqueness, and individuality in behavioural ecology. STUDIES IN HISTORY AND PHILOSOPHY OF SCIENCE 2022; 96:18-26. [PMID: 36150283 DOI: 10.1016/j.shpsa.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 07/30/2022] [Accepted: 08/05/2022] [Indexed: 06/16/2023]
Abstract
In this paper I develop a concept of behavioural ecological individuality. Using findings from a case study which employed qualitative methods, I argue that individuality in behavioural ecology should be defined as phenotypic and ecological uniqueness, a concept that is operationalised in terms of individual differences such as animal personality and individual specialisation. This account make sense of how the term "individuality" is used in relation to intrapopulation variation in behavioural ecology. The concept of behavioural ecological individuality can sometimes be used to identify individuals. It also shapes research agendas and methodological choices in behavioural ecology, leading researchers to account for individuals as sources of variation. Overall, this paper draws attention to a field that has been largely overlooked in philosophical discussions of biological individuality and highlights the importance of individual differences and uniqueness for individuality in behavioural ecology.
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Walker MJ, Nielsen J, Goddard E, Harris A, Hutchison K. Induced Pluripotent Stem Cell-Based Systems for Personalising Epilepsy Treatment: Research Ethics Challenges and New Insights for the Ethics of Personalised Medicine. AJOB Neurosci 2021; 13:120-131. [PMID: 34324412 DOI: 10.1080/21507740.2021.1949404] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
ABSTRACTThis paper examines potential ethical and legal issues arising during the research, development and clinical use of a proposed strategy in personalized medicine (PM): using human induced pluripotent stem cell (iPSC)-derived tissue cultures as predictive models of individual patients to inform treatment decisions. We focus on epilepsy treatment as a likely early application of this strategy, for which early-stage stage research is underway. In relation to the research process, we examine issues associated with biological samples; data; health; vulnerable populations; neural organoids; and what level of accuracy justifies using the iPSC-derived neural tissue system. In relation to clinical use, we examine potential uses in pre-natal screening, and effects on clinical decision-making. Although our focus is providing recommendations for researchers developing work in this area, we identify the novel issue of deciding on an acceptable accuracy level for the system. We also emphasize an issue thus far neglected in the ethics of PM: PM tends to represent treatment decisions as though they should be directed solely by biomedical information, but this in itself could be detrimental to best personalizing treatment decisions in the clinic.
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Affiliation(s)
- Mary Jean Walker
- La Trobe University.,ARC Centre of Excellence for Electromaterials Science, University of Wollongong
| | - Jane Nielsen
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong.,University of Tasmania
| | - Eliza Goddard
- La Trobe University.,ARC Centre of Excellence for Electromaterials Science, University of Wollongong
| | - Alex Harris
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong.,University of Melbourne
| | - Katrina Hutchison
- ARC Centre of Excellence for Electromaterials Science, University of Wollongong.,Macquarie University
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Raimondi I, Tunesi M, Forloni G, Albani D, Giordano C. 3D brain tissue physiological model with co-cultured primary neurons and glial cells in hydrogels. J Tissue Eng 2020; 11:2041731420963981. [PMID: 33117519 PMCID: PMC7570768 DOI: 10.1177/2041731420963981] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/13/2020] [Indexed: 01/20/2023] Open
Abstract
Recently, researchers have focused on the role of gut microbiota on human health and reported the existence of a bidirectional relationship between intestinal microbiota and the brain, referred to as microbiota-gut-brain axis (MGBA). In this context, the development of an organ-on-a-chip platform recapitulating the main players of the MGBA would help in the investigations of the biochemical mechanisms involved. In this work, we focused on the development of a new, hydrogel-based, 3D brain-like tissue model to be hosted in the brain compartment of the aforementioned platform. We previously cultured primary mouse microglial cells, cortical neurons and astrocytes independently, once embedded or covered by a millimeter layer of two selected collagen-based hydrogels. We evaluated cell metabolic activity up to 21 days, cell morphology, spatial distribution and synapse formation. Then, we exploited the best performing culturing condition and developed a more complex brain-like tissue model based on the co-culture of cortical neurons and glial cells in physiological conditions. The obtained results indicate that our 3D hydrogel-based brain tissue model is suitable to recapitulate in vitro the key biochemical parameters of brain tissue.
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Affiliation(s)
- Ilaria Raimondi
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Milan, Italy
| | - Marta Tunesi
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Milan, Italy
| | - Gianluigi Forloni
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Diego Albani
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Carmen Giordano
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Milan, Italy
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Hyland ME. A reformulated contextual model of psychotherapy for treating anxiety and depression. Clin Psychol Rev 2020; 80:101890. [PMID: 32682187 PMCID: PMC7352110 DOI: 10.1016/j.cpr.2020.101890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 11/18/2022]
Abstract
This paper describes a reformulated contextual model that uses cognitive theory (dual process theory), motivation theory (personality) and behavioral adaptation (self-correcting control systems) to show how anxiety and depression are caused, treated and prevented by an interaction between people and contexts. Depression and anxiety are the result of implicit beliefs (not cognitions) that all experience is unrewarding and threatening, these being components of the implicit belief that life is bad. Implicit beliefs are formed automatically from contextual cues and in healthy individuals are consistent with rational appraisal. They become more negative than reality through a process of adaptation when behaviors, directed by rational thinking, repeatedly create cues that signify lack of reward or threat. Such behaviors occur when social or other obligations lead people to choose behaviors that fail to satisfy their own unique goals in life and approach threatening situations, contrary to their automatic reactions. Therapeutic interventions and lifestyle change reverse these adaptive processes by positive experiences that create positive implicit beliefs, a change effected in different ways by contextual and specific mechanisms both of which correct the same fault of negative implicit beliefs. Effective therapeutic relationships and interventions are achieved by detecting and responding to a patient's unique needs and goals and their associated implicit beliefs. Mental health requires not only that people experience life as good as defined by their own goals and beliefs but also the avoidance of contexts where social and other pressures induce people to behave in ways inconsistent with their automatically generated feelings.
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Affiliation(s)
- Michael E Hyland
- Plymouth Marjon University, Derriford Road, Plymouth PL6 8BH, United Kingdom; University of Plymouth, Drakes Circus, Plymouth PL4 8AA, United Kingdom.
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Kilpatrick K, Paquette L, Bird M, Jabbour M, Carter N, Tchouaket É. Team Functioning And Beliefs About Team Effectiveness In Inter-Professional Teams: Questionnaire Development And Validation. J Multidiscip Healthc 2019; 12:827-839. [PMID: 31632051 PMCID: PMC6781853 DOI: 10.2147/jmdh.s218540] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 09/18/2019] [Indexed: 12/12/2022] Open
Abstract
Purpose Few validated instruments are available to measure team functioning in acute and primary care teams. To address this, we developed a questionnaire measuring healthcare provider perceptions of team effectiveness (Provider-PTE) and assessed its psychometric properties. Patients and methods Empirical evidence and a conceptual model were used for item generation. The 41-item self-completed questionnaire was developed. A cross-sectional survey of healthcare providers (n=283) across a range of settings was performed. Psychometric properties were assessed for French and English language questionnaires using Cronbach alpha (α) for reliability, the feedback form for face validity, expert opinion for content validity, and the known-group technique for construct validity. Responsiveness was examined by comparing scores in high and low functioning teams. Results The mean time needed to complete the questionnaire was less than 9 mins. Respondents were typically female (84%), and employed full time (80%) in urban settings (82%). Cronbach α values were as follows: Team Processes = 0.88; PTE-Overall = 0.91; Outcomes = 0.72. Significant differences were found by professional group (p = 0.017), length of time in the team (p = 0.025), and presence of nurse practitioners. Responses to Outcomes varied by employment status (p = 0.017). Differences were identified in high and low functioning teams (p<0.001). Feedback indicated that two questions related to team meetings needed to be added. Conclusion The study produced evidence of validity for English and French language Provider-PTE questionnaires. The revised 43-item instrument represents an important contribution by providing a validated questionnaire to measure team functioning across a range of settings that is consistent with a conceptual framework.
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Affiliation(s)
- Kelley Kilpatrick
- Susan E. French Chair in Nursing Research and Innovative Practice, Ingram School of Nursing, McGill University, Montreal, Quebec, Canada.,Centre intégré universitaire de santé et de services sociaux de l'Est-de-l'Île-de-Montréal, Maisonneuve-Rosemont Hospital Site, Montréal, Quebec, Canada
| | - Lysane Paquette
- Faculty of Nursing, Université de Montreal, Montréal, Quebec, Canada
| | - Marissa Bird
- School of Nursing, McMaster University, Hamilton, Ontario, Canada
| | - Mira Jabbour
- Centre intégré universitaire de santé et de services sociaux de l'Est-de-l'Île-de-Montréal, Maisonneuve-Rosemont Hospital Site, Montréal, Quebec, Canada
| | - Nancy Carter
- School of Nursing, McMaster University, Hamilton, Ontario, Canada
| | - Éric Tchouaket
- Department of Nursing, Université du Québec en Outaouais (UQO), Saint-Jérôme, Quebec, Canada
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Antill-O'Brien N, Bourke J, O'Connell CD. Layer-By-Layer: The Case for 3D Bioprinting Neurons to Create Patient-Specific Epilepsy Models. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3218. [PMID: 31581436 PMCID: PMC6804258 DOI: 10.3390/ma12193218] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 09/26/2019] [Accepted: 09/26/2019] [Indexed: 02/06/2023]
Abstract
The ability to create three-dimensional (3D) models of brain tissue from patient-derived cells, would open new possibilities in studying the neuropathology of disorders such as epilepsy and schizophrenia. While organoid culture has provided impressive examples of patient-specific models, the generation of organised 3D structures remains a challenge. 3D bioprinting is a rapidly developing technology where living cells, encapsulated in suitable bioink matrices, are printed to form 3D structures. 3D bioprinting may provide the capability to organise neuronal populations in 3D, through layer-by-layer deposition, and thereby recapitulate the complexity of neural tissue. However, printing neuron cells raises particular challenges since the biomaterial environment must be of appropriate softness to allow for the neurite extension, properties which are anathema to building self-supporting 3D structures. Here, we review the topic of 3D bioprinting of neurons, including critical discussions of hardware and bio-ink formulation requirements.
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Affiliation(s)
- Natasha Antill-O'Brien
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Fitzroy, VIC 3065, Australia.
| | - Justin Bourke
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Fitzroy, VIC 3065, Australia.
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, NSW 2522, Australia.
- Department of Medicine, St Vincent's Hospital Melbourne, University of Melbourne, Fitzroy, VIC 3065, Australia.
| | - Cathal D O'Connell
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital Melbourne, Fitzroy, VIC 3065, Australia.
- ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, NSW 2522, Australia.
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