251
|
Harrison F, Diggle SP. An ex vivo lung model to study bronchioles infected with Pseudomonas aeruginosa biofilms. Microbiology (Reading) 2016; 162:1755-1760. [DOI: 10.1099/mic.0.000352] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Freya Harrison
- School of Life Sciences, University of Warwick, Coventry, UK
- Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Stephen P. Diggle
- Centre for Biomolecular Sciences, School of Life Sciences, University of Nottingham, Nottingham, UK
| |
Collapse
|
252
|
Ellenbroek BA, Angelucci F, Husum H, Mathé AA. Gene-environment interactions in a rat model of depression. Maternal separation affects neurotensin in selected brain regions. Neuropeptides 2016; 59:83-88. [PMID: 27372546 DOI: 10.1016/j.npep.2016.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/13/2016] [Accepted: 05/23/2016] [Indexed: 12/11/2022]
Abstract
Although the etiology of major psychiatric disorders has not been elucidated, accumulating evidence indicates that both genetic and early environmental factors play a role. We have previously demonstrated behavioral and neurochemical changes both in non-manipulated genetic rat models of depression, such as Flinders Sensitive Line (FSL) and Fawn Hooded (FH), and in normal rats following maternal separation (MS). The aim of the present study was to extend this work by exploring whether neurotensin (NT), a peptide implicated in several psychiatric disorders, is altered in a new animal model based on gene - environment interactions. More specifically, we used the FSL rats as a genetic model of depression and the Flinders Resistant Line (FRL) as controls and subjected them to MS. Pups randomly assigned to the MS procedure were separated from the dam as a litter for 180min daily between postnatal day 2 to 14. On postnatal day 90, rats were weighed and sacrificed by a two second high energy focused microwave irradiation and several brain regions were obtained by micropuncture. Neurotensin-like immunoreactivity (NT-LI) was measured by radioimmunoassay (RIA). The results showed that the FSL rats compared to the FRL rats have higher baseline NT-LI concentrations in the temporal cortex and periaqueductal gray and a markedly different response to maternal separation. The only observed change following maternal separation in the FRL rats was an NT-LI increase in the periaqueductal gray. In contrast, in the FSL significant increases were found in the nucleus accumbens, hippocampus, and entorhinal cortex and a decrease was seen in the temporal cortex after MS. The present study revealed baseline regional differences in NT-LI concentrations between the FSL and FRL strains and demonstrated that early MD differentially affects the two strains. The relevance of these alterations for depression as well as possible mechanisms underlying this gene-environment interaction are discussed.
Collapse
Affiliation(s)
- Bart A Ellenbroek
- School of Psychology, Victoria University of Wellington, Wellington, New Zealand.
| | | | - Henriette Husum
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Aleksander A Mathé
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
253
|
Rezaei Kolahchi A, Khadem Mohtaram N, Pezeshgi Modarres H, Mohammadi MH, Geraili A, Jafari P, Akbari M, Sanati-Nezhad A. Microfluidic-Based Multi-Organ Platforms for Drug Discovery. MICROMACHINES 2016; 7:E162. [PMID: 30404334 PMCID: PMC6189912 DOI: 10.3390/mi7090162] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 12/18/2022]
Abstract
Development of predictive multi-organ models before implementing costly clinical trials is central for screening the toxicity, efficacy, and side effects of new therapeutic agents. Despite significant efforts that have been recently made to develop biomimetic in vitro tissue models, the clinical application of such platforms is still far from reality. Recent advances in physiologically-based pharmacokinetic and pharmacodynamic (PBPK-PD) modeling, micro- and nanotechnology, and in silico modeling have enabled single- and multi-organ platforms for investigation of new chemical agents and tissue-tissue interactions. This review provides an overview of the principles of designing microfluidic-based organ-on-chip models for drug testing and highlights current state-of-the-art in developing predictive multi-organ models for studying the cross-talk of interconnected organs. We further discuss the challenges associated with establishing a predictive body-on-chip (BOC) model such as the scaling, cell types, the common medium, and principles of the study design for characterizing the interaction of drugs with multiple targets.
Collapse
Affiliation(s)
- Ahmad Rezaei Kolahchi
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Nima Khadem Mohtaram
- Laboratory for Innovations in MicroEngineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Division of Medical Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
| | - Hassan Pezeshgi Modarres
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| | - Mohammad Hossein Mohammadi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Armin Geraili
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Parya Jafari
- Department of Electrical Engineering, Sharif University of Technology, Azadi Ave., Tehran 11155-9516, Iran.
| | - Mohsen Akbari
- Laboratory for Innovations in MicroEngineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Division of Medical Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada.
| | - Amir Sanati-Nezhad
- BioMEMS and Bioinspired Microfluidic Laboratory, Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
- Center for Bioengineering Research and Education, Biomedical Engineering Program, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada.
| |
Collapse
|
254
|
Deane CAS, Brown IR. Induction of heat shock proteins in differentiated human neuronal cells following co-application of celastrol and arimoclomol. Cell Stress Chaperones 2016; 21:837-48. [PMID: 27273088 PMCID: PMC5003800 DOI: 10.1007/s12192-016-0708-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/19/2023] Open
Abstract
Few effective therapies exist for the treatment of neurodegenerative diseases that have been characterized as protein misfolding disorders. Upregulation of heat shock proteins (Hsps) mitigates against the accumulation of misfolded, aggregation-prone proteins and synaptic dysfunction, which is recognized as an early event in neurodegenerative diseases. Enhanced induction of a set of Hsps in differentiated human SH-SY5Y neuronal cells was observed following co-application of celastrol and arimoclomol, compared to their individual application. The dosages employed did not affect cell viability or neuronal process morphology. The induced Hsps included the little studied HSPA6 (Hsp70B'), a potentially neuroprotective protein that is present in the human genome but not in rat and mouse and hence is missing in current animal models of neurodegenerative disease. Enhanced induction of HSPA1A (Hsp70-1), DNAJB1 (Hsp40), HO-1 (Hsp32), and HSPB1 (Hsp27) was also observed. Celastrol activates heat shock transcription factor 1 (HSF1), the master regulator of Hsp gene transcription, and also exhibits potent anti-inflammatory and anti-oxidant activities. Arimoclomol is a co-activator that prolongs the binding of activated HSF1 to heat shock elements (HSEs) in the promoter regions of inducible Hsp genes. Elevated Hsp levels peaked at 10 to 12 h for HSPA6, HSPA1A, DNAJB1, and HO-1 and at 24 h for HSPB1. Co-application of celastrol and arimoclomol induced higher Hsp levels compared to heat shock paired with arimoclomol. The co-application strategy of celastrol and arimoclomol targets multiple neurodegenerative disease-associated pathologies including protein misfolding and protein aggregation, inflammatory and oxidative stress, and synaptic dysfunction.
Collapse
Affiliation(s)
- Catherine A S Deane
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
| | - Ian R Brown
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada.
| |
Collapse
|
255
|
|
256
|
Pešić V, Petrović J, M Jukić M. Molecular Mechanism and Clinical Relevance of Ketamine as Rapid-Acting Antidepressant. Drug Dev Res 2016; 77:414-422. [DOI: 10.1002/ddr.21335] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Vesna Pešić
- Department of Physiology; Faculty of Pharmacy, University of Belgrade; Belgrade Serbia
| | - Jelena Petrović
- Department of Physiology; Faculty of Pharmacy, University of Belgrade; Belgrade Serbia
| | - Marin M Jukić
- Department of Physiology and Pharmacology; Karolinska Institute; Stockholm Sweden
| |
Collapse
|
257
|
Mouse models of Down syndrome: gene content and consequences. Mamm Genome 2016; 27:538-555. [PMID: 27538963 DOI: 10.1007/s00335-016-9661-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/27/2016] [Indexed: 12/25/2022]
Abstract
Down syndrome (DS), trisomy of human chromosome 21 (Hsa21), is challenging to model in mice. Not only is it a contiguous gene syndrome spanning 35 Mb of the long arm of Hsa21, but orthologs of Hsa21 genes map to segments of three mouse chromosomes, Mmu16, Mmu17, and Mmu10. The Ts65Dn was the first viable segmental trisomy mouse model for DS; it is a partial trisomy currently popular in preclinical evaluations of drugs for cognition in DS. Limitations of the Ts65Dn are as follows: (i) it is trisomic for 125 human protein-coding orthologs, but only 90 of these are Hsa21 orthologs and (ii) it lacks trisomy for ~75 Hsa21 orthologs. In recent years, several additional mouse models of DS have been generated, each trisomic for a different subset of Hsa21 genes or their orthologs. To best exploit these models and interpret the results obtained with them, prior to proposing clinical trials, an understanding of their trisomic gene content, relative to full trisomy 21, is necessary. Here we first review the functional information on Hsa21 protein-coding genes and the more recent annotation of a large number of functional RNA genes. We then discuss the conservation and genomic distribution of Hsa21 orthologs in the mouse genome and the distribution of mouse-specific genes. Lastly, we consider the strengths and weaknesses of mouse models of DS based on the number and nature of the Hsa21 orthologs that are, and are not, trisomic in each, and discuss their validity for use in preclinical evaluations of drug responses.
Collapse
|
258
|
Safavi M, Sabourian R, Abdollahi M. The development of biomarkers to reduce attrition rate in drug discovery focused on oncology and central nervous system. Expert Opin Drug Discov 2016; 11:939-56. [DOI: 10.1080/17460441.2016.1217196] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
259
|
Zhang Z, Yu S, Liang X, Zhu Y, Xie Y. A novel design of ultrafast micro-CT system based on carbon nanotube: A feasibility study in phantom. Phys Med 2016; 32:1302-1307. [PMID: 27423826 DOI: 10.1016/j.ejmp.2016.06.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/14/2016] [Accepted: 06/30/2016] [Indexed: 12/19/2022] Open
Abstract
Artifacts induced by respiratory motion during routine diagnosis severely degrades the image quality. The increase of scanning speed plays an important role to avoid motion artifacts. Limited to the mechanical structure of conventional CT, the increase of gantry rotational speed is unsustainable and a more feasible way is to increase the number of X-ray sources and detectors like the dual-source CT. This paper focuses on high-speed scanning CT and proposes a novel ultrafast micro-CT (UMCT) system based on carbon nanotube (CNT). At each exposure position, all of the X-ray sources are fast activated by turns and the flat-panel detectors collect the corresponding projection data. Then, the gantry will be contrarotated 40° to prepare for the next exposure until the rotation covers full 360°. Because each exposure is very fast, the organ motions of in vivo human body can be greatly reduced. This paper introduces the UMCT system design, image reconstruction algorithm and experimental results. Simulation experiment was also carried out on UMCT system. The result validated the feasibility of the UMCT system.
Collapse
Affiliation(s)
- Zhicheng Zhang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, China
| | - Shaode Yu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, China
| | - Xiaokun Liang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; School of Information Engineering, Guangdong Medical College, Dongguan, China
| | - Yanchun Zhu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
| | - Yaoqin Xie
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
| |
Collapse
|
260
|
Steiner S, Bisig C, Petri-Fink A, Rothen-Rutishauser B. Diesel exhaust: current knowledge of adverse effects and underlying cellular mechanisms. Arch Toxicol 2016; 90:1541-53. [PMID: 27165416 PMCID: PMC4894930 DOI: 10.1007/s00204-016-1736-5] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 04/28/2016] [Indexed: 12/03/2022]
Abstract
Diesel engine emissions are among the most prevalent anthropogenic pollutants worldwide, and with the growing popularity of diesel-fueled engines in the private transportation sector, they are becoming increasingly widespread in densely populated urban regions. However, a large number of toxicological studies clearly show that diesel engine emissions profoundly affect human health. Thus the interest in the molecular and cellular mechanisms underlying these effects is large, especially concerning the nature of the components of diesel exhaust responsible for the effects and how they could be eliminated from the exhaust. This review describes the fundamental properties of diesel exhaust as well as the human respiratory tract and concludes that adverse health effects of diesel exhaust not only emerge from its chemical composition, but also from the interplay between its physical properties, the physiological and cellular properties, and function of the human respiratory tract. Furthermore, the primary molecular and cellular mechanisms triggered by diesel exhaust exposure, as well as the fundamentals of the methods for toxicological testing of diesel exhaust toxicity, are described. The key aspects of adverse effects induced by diesel exhaust exposure described herein will be important for regulators to support or ban certain technologies or to legitimate incentives for the development of promising new technologies such as catalytic diesel particle filters.
Collapse
Affiliation(s)
- Sandro Steiner
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Christoph Bisig
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | - Alke Petri-Fink
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700, Fribourg, Switzerland
| | | |
Collapse
|
261
|
Ku KM, Weir RK, Silverman JL, Berman RF, Bauman MD. Behavioral Phenotyping of Juvenile Long-Evans and Sprague-Dawley Rats: Implications for Preclinical Models of Autism Spectrum Disorders. PLoS One 2016; 11:e0158150. [PMID: 27351457 PMCID: PMC4924796 DOI: 10.1371/journal.pone.0158150] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 06/10/2016] [Indexed: 11/18/2022] Open
Abstract
The laboratory rat is emerging as an attractive preclinical animal model of autism spectrum disorder (ASD), allowing investigators to explore genetic, environmental and pharmacological manipulations in a species exhibiting complex, reciprocal social behavior. The present study was carried out to compare two commonly used strains of laboratory rats, Sprague-Dawley (SD) and Long-Evans (LE), between the ages of postnatal day (PND) 26-56 using high-throughput behavioral phenotyping tools commonly used in mouse models of ASD that we have adapted for use in rats. We detected few differences between young SD and LE strains on standard assays of exploration, sensorimotor gating, anxiety, repetitive behaviors, and learning. Both SD and LE strains also demonstrated sociability in the 3-chamber social approach test as indexed by spending more time in the social chamber with a constrained age/strain/sex matched novel partner than in an identical chamber without a partner. Pronounced differences between the two strains were, however, detected when the rats were allowed to freely interact with a novel partner in the social dyad paradigm. The SD rats in this particular testing paradigm engaged in play more frequently and for longer durations than the LE rats at both juvenile and young adult developmental time points. Results from this study that are particularly relevant for developing preclinical ASD models in rats are threefold: (i) commonly utilized strains exhibit unique patterns of social interactions, including strain-specific play behaviors, (ii) the testing environment may profoundly influence the expression of strain-specific social behavior and (iii) simple, automated measures of sociability may not capture the complexities of rat social interactions.
Collapse
Affiliation(s)
- Katherine M. Ku
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, California, United States of America
| | - Ruth K. Weir
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, California, United States of America
| | - Jill L. Silverman
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, California, United States of America
- The MIND Institute, University of California, Davis, Sacramento, California, United States of America
| | - Robert F. Berman
- Department of Neurological Surgery, University of California, Davis, Davis, California, United States of America
| | - Melissa D. Bauman
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, California, United States of America
- The MIND Institute, University of California, Davis, Sacramento, California, United States of America
- California National Primate Research Center, Davis, California, United States of America
- * E-mail:
| |
Collapse
|
262
|
Schumacher M, Denier C, Oudinet JP, Adams D, Guennoun R. Progesterone neuroprotection: The background of clinical trial failure. J Steroid Biochem Mol Biol 2016; 160:53-66. [PMID: 26598278 DOI: 10.1016/j.jsbmb.2015.11.010] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 11/08/2015] [Accepted: 11/12/2015] [Indexed: 12/12/2022]
Abstract
Since the first pioneering studies in the 1990s, a large number of experimental animal studies have demonstrated the neuroprotective efficacy of progesterone for brain disorders, including traumatic brain injury (TBI). In addition, this steroid has major assets: it easily crosses the blood-brain-barrier, rapidly diffuses throughout the brain and exerts multiple beneficial effects by acting on many molecular and cellular targets. Moreover, progesterone therapies are well tolerated. Notably, increased brain levels of progesterone are part of endogenous neuroprotective responses to injury. The hormone thus emerged as a particularly promising protective candidate for TBI and stroke patients. The positive outcomes of small Phase 2 trials aimed at testing the safety and potential protective efficacy of progesterone in TBI patients then provided support and guidance for two large, multicenter, randomized and placebo-controlled Phase 3 trials, with more than 2000 TBI patients enrolled. The negative outcomes of both trials, named ProTECT III and SyNAPSE, came as a big disappointment. If these trials were successful, progesterone would have become the first efficient neuroprotective drug for brain-injured patients. Thus, progesterone has joined the numerous neuroprotective candidates that have failed in clinical trials. The aim of this review is a reappraisal of the preclinical animal studies, which provided the proof of concept for the clinical trials, and we critically examine the design of the clinical studies. We made efforts to present a balanced view of the strengths and limitations of the translational studies and of some serious issues with the clinical trials. We place particular emphasis on the translational value of animal studies and the relevance of TBI biomarkers. The probability of failure of ProTECT III and SyNAPSE was very high, and we present them within the broader context of other unsuccessful trials.
Collapse
Affiliation(s)
- Michael Schumacher
- U1195 Inserm and University Paris-Sud and University Paris-Saclay, 80 rue du Général Leclerc, 94276 Kremlin-Bicêtre, France.
| | - Christian Denier
- U1195 Inserm and University Paris-Sud and University Paris-Saclay, 80 rue du Général Leclerc, 94276 Kremlin-Bicêtre, France; Department of Neurology, CHU Bicêtre, 78 rue du Général Leclerc, 94275 Kremlin-Bicêtre, France
| | - Jean-Paul Oudinet
- U1195 Inserm and University Paris-Sud and University Paris-Saclay, 80 rue du Général Leclerc, 94276 Kremlin-Bicêtre, France
| | - David Adams
- U1195 Inserm and University Paris-Sud and University Paris-Saclay, 80 rue du Général Leclerc, 94276 Kremlin-Bicêtre, France; Department of Neurology, CHU Bicêtre, 78 rue du Général Leclerc, 94275 Kremlin-Bicêtre, France
| | - Rachida Guennoun
- U1195 Inserm and University Paris-Sud and University Paris-Saclay, 80 rue du Général Leclerc, 94276 Kremlin-Bicêtre, France
| |
Collapse
|
263
|
Vasilopoulou CG, Margarity M, Klapa MI. Metabolomic Analysis in Brain Research: Opportunities and Challenges. Front Physiol 2016; 7:183. [PMID: 27252656 PMCID: PMC4878281 DOI: 10.3389/fphys.2016.00183] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 05/09/2016] [Indexed: 12/11/2022] Open
Abstract
Metabolism being a fundamental part of molecular physiology, elucidating the structure and regulation of metabolic pathways is crucial for obtaining a comprehensive perspective of cellular function and understanding the underlying mechanisms of its dysfunction(s). Therefore, quantifying an accurate metabolic network activity map under various physiological conditions is among the major objectives of systems biology in the context of many biological applications. Especially for CNS, metabolic network activity analysis can substantially enhance our knowledge about the complex structure of the mammalian brain and the mechanisms of neurological disorders, leading to the design of effective therapeutic treatments. Metabolomics has emerged as the high-throughput quantitative analysis of the concentration profile of small molecular weight metabolites, which act as reactants and products in metabolic reactions and as regulatory molecules of proteins participating in many biological processes. Thus, the metabolic profile provides a metabolic activity fingerprint, through the simultaneous analysis of tens to hundreds of molecules of pathophysiological and pharmacological interest. The application of metabolomics is at its standardization phase in general, and the challenges for paving a standardized procedure are even more pronounced in brain studies. In this review, we support the value of metabolomics in brain research. Moreover, we demonstrate the challenges of designing and setting up a reliable brain metabolomic study, which, among other parameters, has to take into consideration the sex differentiation and the complexity of brain physiology manifested in its regional variation. We finally propose ways to overcome these challenges and design a study that produces reproducible and consistent results.
Collapse
Affiliation(s)
- Catherine G Vasilopoulou
- Metabolic Engineering and Systems Biology Laboratory, Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas (FORTH/ICE-HT)Patras, Greece; Human and Animal Physiology Laboratory, Department of Biology, University of PatrasPatras, Greece
| | - Marigoula Margarity
- Human and Animal Physiology Laboratory, Department of Biology, University of Patras Patras, Greece
| | - Maria I Klapa
- Metabolic Engineering and Systems Biology Laboratory, Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas (FORTH/ICE-HT)Patras, Greece; Departments of Chemical and Biomolecular Engineering and Bioengineering, University of MarylandCollege Park, MD, USA
| |
Collapse
|
264
|
Gururajan A, Clarke G, Dinan TG, Cryan JF. Molecular biomarkers of depression. Neurosci Biobehav Rev 2016; 64:101-33. [DOI: 10.1016/j.neubiorev.2016.02.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/11/2016] [Accepted: 02/12/2016] [Indexed: 12/22/2022]
|
265
|
Arends MJ, White ES, Whitelaw CBA. Animal and cellular models of human disease. J Pathol 2016; 238:137-40. [PMID: 26482929 DOI: 10.1002/path.4662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 10/17/2015] [Indexed: 02/02/2023]
Abstract
In this eighteenth (2016) Annual Review Issue of The Journal of Pathology, we present a collection of 19 invited review articles that cover different aspects of cellular and animal models of disease. These include genetically-engineered models, chemically-induced models, naturally-occurring models, and combinations thereof, with the focus on recent methodological and conceptual developments across a wide range of human diseases.
Collapse
Affiliation(s)
- Mark J Arends
- Centre for Comparative Pathology, University of Edinburgh, Edinburgh, UK
| | - Eric S White
- Division of Pulmonary & Critical Care Medicine, Department of Medicine, University of Michigan Medical School, Ann Arbor, USA
| | | |
Collapse
|
266
|
Nongonierma AB, FitzGerald RJ. Strategies for the discovery, identification and validation of milk protein-derived bioactive peptides. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.01.022] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
267
|
Tsukamoto T. Animal disease models for drug screening: the elephant in the room? Drug Discov Today 2016; 21:529-30. [DOI: 10.1016/j.drudis.2016.02.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 02/18/2016] [Indexed: 11/30/2022]
|
268
|
Comparison of the response using ICR mice derived from three different sources to ethanol/hydrochloric acid-induced gastric injury. Lab Anim Res 2016; 32:56-64. [PMID: 27051443 PMCID: PMC4816997 DOI: 10.5625/lar.2016.32.1.56] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 02/28/2016] [Accepted: 03/03/2016] [Indexed: 01/16/2023] Open
Abstract
Animal models for gastric ulcers produced by physical, pharmacological and surgical methods have been widely employed to evaluate therapeutic drugs and investigate the mechanism of action of this disease. ICR mice were selected to produce this model, even though several mice and rats have been widely used in studies of gastric ulcers. To compare the responses of ICR mice obtained from three different sources to gastric ulcer inducers, alterations in gastric injury, histopathological structure, and inflammation were measured in Korl:ICR (Korea NIFDS source), A:ICR (USA source) and B:ICR (Japan source) treated with three concentrations of ethanol (EtOH) (50, 70, and 90%) in 150 mM hydrochloric acid (HCl) solution. Firstly, the stomach lesion index gradually increased as the EtOH concentration increased in three ICR groups. Moreover, a significant increase in the level of mucosal injury, edema and the number of inflammatory cells was similarly detected in the EtOH/HCl treated group compared with the vehicle treated group in three ICR groups. Furthermore, the number of infiltrated mast cells and IL-1β expression were very similar in the ICR group derived from three different sources, although some differences in IL-1β expression were detected. Especially, the level of IL-1β mRNA in 50 and 90EtOH/HCl treated group was higher in Korl:ICR and A:ICR than B:ICR. Overall, the results of this study suggest that Korl:ICR, A:ICR and B:ICR derived from different sources have an overall similar response to gastric ulcer induced by EtOH/HCl administration, although there were some differences in the magnitude of their responses.
Collapse
|
269
|
Bell RL, Hauser S, Rodd ZA, Liang T, Sari Y, McClintick J, Rahman S, Engleman EA. A Genetic Animal Model of Alcoholism for Screening Medications to Treat Addiction. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2016; 126:179-261. [PMID: 27055615 PMCID: PMC4851471 DOI: 10.1016/bs.irn.2016.02.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The purpose of this review is to present up-to-date pharmacological, genetic, and behavioral findings from the alcohol-preferring P rat and summarize similar past work. Behaviorally, the focus will be on how the P rat meets criteria put forth for a valid animal model of alcoholism with a highlight on its use as an animal model of polysubstance abuse, including alcohol, nicotine, and psychostimulants. Pharmacologically and genetically, the focus will be on the neurotransmitter and neuropeptide systems that have received the most attention: cholinergic, dopaminergic, GABAergic, glutamatergic, serotonergic, noradrenergic, corticotrophin releasing hormone, opioid, and neuropeptide Y. Herein, we sought to place the P rat's behavioral and neurochemical phenotypes, and to some extent its genotype, in the context of the clinical literature. After reviewing the findings thus far, this chapter discusses future directions for expanding the use of this genetic animal model of alcoholism to identify molecular targets for treating drug addiction in general.
Collapse
Affiliation(s)
- R L Bell
- Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, United States.
| | - S Hauser
- Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Z A Rodd
- Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, United States
| | - T Liang
- Indiana University School of Medicine, Indianapolis, IN, United States
| | - Y Sari
- University of Toledo, Toledo, OH, United States
| | - J McClintick
- Center for Medical Genomics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - S Rahman
- Department of Pharmaceutical Sciences, South Dakota State University, Brookings, SD, United States
| | - E A Engleman
- Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, United States
| |
Collapse
|
270
|
Murphy H, Jaafari H, Dobrovolny HM. Differences in predictions of ODE models of tumor growth: a cautionary example. BMC Cancer 2016; 16:163. [PMID: 26921070 PMCID: PMC4768423 DOI: 10.1186/s12885-016-2164-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 02/14/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND While mathematical models are often used to predict progression of cancer and treatment outcomes, there is still uncertainty over how to best model tumor growth. Seven ordinary differential equation (ODE) models of tumor growth (exponential, Mendelsohn, logistic, linear, surface, Gompertz, and Bertalanffy) have been proposed, but there is no clear guidance on how to choose the most appropriate model for a particular cancer. METHODS We examined all seven of the previously proposed ODE models in the presence and absence of chemotherapy. We derived equations for the maximum tumor size, doubling time, and the minimum amount of chemotherapy needed to suppress the tumor and used a sample data set to compare how these quantities differ based on choice of growth model. RESULTS We find that there is a 12-fold difference in predicting doubling times and a 6-fold difference in the predicted amount of chemotherapy needed for suppression depending on which growth model was used. CONCLUSION Our results highlight the need for careful consideration of model assumptions when developing mathematical models for use in cancer treatment planning.
Collapse
Affiliation(s)
- Hope Murphy
- Department of Physics, Utica College, Utica, NY, USA.
| | - Hana Jaafari
- Department of Physics & Astronomy, Texas Christian University, 2800 S. University Drive, TX, 76129, Fort Worth, USA.
| | - Hana M Dobrovolny
- Department of Physics & Astronomy, Texas Christian University, 2800 S. University Drive, TX, 76129, Fort Worth, USA.
| |
Collapse
|
271
|
Hill AB, Chen M, Chen CK, Pfeifer BA, Jones CH. Overcoming Gene-Delivery Hurdles: Physiological Considerations for Nonviral Vectors. Trends Biotechnol 2016; 34:91-105. [PMID: 26727153 PMCID: PMC5800990 DOI: 10.1016/j.tibtech.2015.11.004] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 11/16/2015] [Accepted: 11/17/2015] [Indexed: 12/13/2022]
Abstract
With the use of contemporary tools and techniques, it has become possible to more precisely tune the biochemical mechanisms associated with using nonviral vectors for gene delivery. Consequently, nonviral vectors can incorporate numerous vector compositions and types of genetic cargo to develop diverse genetic therapies. Despite these advantages, gene-delivery strategies using nonviral vectors have poorly translated into clinical success due to preclinical experimental design considerations that inadequately predict therapeutic efficacy. Furthermore, the manufacturing and distribution processes are critical considerations for clinical application that should be considered when developing therapeutic platforms. In this review, we evaluate potential avenues towards improving the transition of gene-delivery technologies from in vitro assessment to human clinical therapy.
Collapse
Affiliation(s)
- Andrew B Hill
- Abcombi Biosciences Inc, Buffalo, NY, USA; McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
| | - Mingfu Chen
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, BY, USA
| | - Chih-Kuang Chen
- Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan, ROC
| | - Blaine A Pfeifer
- Abcombi Biosciences Inc, Buffalo, NY, USA; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, BY, USA.
| | - Charles H Jones
- Abcombi Biosciences Inc, Buffalo, NY, USA; Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, BY, USA.
| |
Collapse
|
272
|
Ardi Z, Albrecht A, Richter-Levin A, Saha R, Richter-Levin G. Behavioral profiling as a translational approach in an animal model of posttraumatic stress disorder. Neurobiol Dis 2016; 88:139-47. [PMID: 26804028 DOI: 10.1016/j.nbd.2016.01.012] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 01/12/2016] [Accepted: 01/19/2016] [Indexed: 12/28/2022] Open
Abstract
Diagnosis of psychiatric disorders in humans is based on comparing individuals to the normal population. However, many animal models analyze averaged group effects, thus compromising their translational power. This discrepancy is particularly relevant in posttraumatic stress disorder (PTSD), where only a minority develop the disorder following a traumatic experience. In our PTSD rat model, we utilize a novel behavioral profiling approach that allows the classification of affected and unaffected individuals in a trauma-exposed population. Rats were exposed to underwater trauma (UWT) and four weeks later their individual performances in the open field and elevated plus maze were compared to those of the control group, allowing the identification of affected and resilient UWT-exposed rats. Behavioral profiling revealed that only a subset of the UWT-exposed rats developed long-lasting behavioral symptoms. The proportion of affected rats was further enhanced by pre-exposure to juvenile stress, a well-described risk factor of PTSD. For a biochemical proof of concept we analyzed the expression levels of the GABAA receptor subunits α1 and α2 in the ventral, dorsal hippocampus and basolateral amygdala. Increased expression, mainly of α1, was observed in ventral but not dorsal hippocampus of exposed animals, which would traditionally be interpreted as being associated with the exposure-resultant psychopathology. However, behavioral profiling revealed that this increased expression was confined to exposed-unaffected individuals, suggesting a resilience-associated expression regulation. The results provide evidence for the importance of employing behavioral profiling in animal models of PTSD, in order to better understand the neural basis of stress vulnerability and resilience.
Collapse
Affiliation(s)
- Ziv Ardi
- Sagol Department of Neurobiology, University of Haifa, Israel; The Institute for the Study of Affective Neuroscience (ISAN), University of Haifa, Israel.
| | - Anne Albrecht
- Sagol Department of Neurobiology, University of Haifa, Israel; The Institute for the Study of Affective Neuroscience (ISAN), University of Haifa, Israel
| | - Alon Richter-Levin
- The Institute for the Study of Affective Neuroscience (ISAN), University of Haifa, Israel
| | - Rinki Saha
- Sagol Department of Neurobiology, University of Haifa, Israel; The Institute for the Study of Affective Neuroscience (ISAN), University of Haifa, Israel
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, Israel; The Institute for the Study of Affective Neuroscience (ISAN), University of Haifa, Israel; Psychology Department, University of Haifa, Israel
| |
Collapse
|
273
|
Abstract
This report aims to facilitate the implementation of the Three Rs (replacement, reduction, and refinement) in the use of animal models or procedures involving sepsis and septic shock, an area where there is the potential of high levels of suffering for animals. The emphasis is on refinement because this has the greatest potential for immediate implementation. Specific welfare issues are identified and discussed, and practical measures are proposed to reduce animal use and suffering as well as reducing experimental variability and increasing translatability. The report is based on discussions and submissions from a nonregulatory expert working group consisting of veterinarians, animal technologists, and scientists with expert knowledge relevant to the field.
Collapse
|
274
|
Jarvis MF, Williams M. Irreproducibility in Preclinical Biomedical Research: Perceptions, Uncertainties, and Knowledge Gaps. Trends Pharmacol Sci 2016; 37:290-302. [PMID: 26776451 DOI: 10.1016/j.tips.2015.12.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/03/2015] [Accepted: 12/07/2015] [Indexed: 01/30/2023]
Abstract
Concerns regarding the reliability of biomedical research outcomes were precipitated by two independent reports from the pharmaceutical industry that documented a lack of reproducibility in preclinical research in the areas of oncology, endocrinology, and hematology. Given their potential impact on public health, these concerns have been extensively covered in the media. Assessing the magnitude and scope of irreproducibility is limited by the anecdotal nature of the initial reports and a lack of quantitative data on specific failures to reproduce published research. Nevertheless, remediation activities have focused on needed enhancements in transparency and consistency in the reporting of experimental methodologies and results. While such initiatives can effectively bridge knowledge gaps and facilitate best practices across established and emerging research disciplines and therapeutic areas, concerns remain on how these improve on the historical process of independent replication in validating research findings and their potential to inhibit scientific innovation.
Collapse
Affiliation(s)
| | - Michael Williams
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| |
Collapse
|
275
|
Mbogo GW, Nedeva C, Puthalakath H. Isolation of Cardiomyocytes and Cardiofibroblasts for Ex Vivo Analysis. Methods Mol Biol 2016; 1419:117-29. [PMID: 27108436 DOI: 10.1007/978-1-4939-3581-9_10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Heart failure (HF) is a common clinical endpoint to several underlying causes including aging, hypertension, stress, and cardiomyopathy. It is characterized by a significant decline in the cardiac output. Cardiomyocytes are terminally differentiated cells and therefore, apoptotic death due to beta adrenergic (β-AR) signaling contributes to high attrition rate of these cells. Past treatments of HF offer some survival benefit to patients (e.g., the beta blockers), but at the expense of blocking the compensatory beta-adrenergic signaling in surviving cells. One prerequisite for developing new therapeutics is to be able to grow cardiomyocytes ex vivo, and test their apoptotic response to drugs. Here we describe methods for isolation and culturing of neonatal and adult calcium tolerant cardiomyocytes. Similarly, cardiofibroblasts can also be isolated using the same protocol and subsequently, immortalized with SV40 T-Antigen for ex vivo studies.
Collapse
Affiliation(s)
- George Williams Mbogo
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Christina Nedeva
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Hamsa Puthalakath
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
| |
Collapse
|
276
|
Namas RA, Mi Q, Namas R, Almahmoud K, Zaaqoq AM, Abdul-Malak O, Azhar N, Day J, Abboud A, Zamora R, Billiar TR, Vodovotz Y. Insights into the Role of Chemokines, Damage-Associated Molecular Patterns, and Lymphocyte-Derived Mediators from Computational Models of Trauma-Induced Inflammation. Antioxid Redox Signal 2015; 23:1370-87. [PMID: 26560096 PMCID: PMC4685502 DOI: 10.1089/ars.2015.6398] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
SIGNIFICANCE Traumatic injury elicits a complex, dynamic, multidimensional inflammatory response that is intertwined with complications such as multiple organ dysfunction and nosocomial infection. The complex interplay between inflammation and physiology in critical illness remains a challenge for translational research, including the extrapolation to human disease from animal models. RECENT ADVANCES Over the past decade, we and others have attempted to decipher the biocomplexity of inflammation in these settings of acute illness, using computational models to improve clinical translation. In silico modeling has been suggested as a computationally based framework for integrating data derived from basic biology experiments as well as preclinical and clinical studies. CRITICAL ISSUES Extensive studies in cells, mice, and human blunt trauma patients have led us to suggest (i) that while an adequate level of inflammation is required for healing post-trauma, inflammation can be harmful when it becomes self-sustaining via a damage-associated molecular pattern/Toll-like receptor-driven feed-forward circuit; (ii) that chemokines play a central regulatory role in driving either self-resolving or self-maintaining inflammation that drives the early activation of both classical innate and more recently recognized lymphoid pathways; and (iii) the presence of multiple thresholds and feedback loops, which could significantly affect the propagation of inflammation across multiple body compartments. FUTURE DIRECTIONS These insights from data-driven models into the primary drivers and interconnected networks of inflammation have been used to generate mechanistic computational models. Together, these models may be used to gain basic insights as well as serving to help define novel biomarkers and therapeutic targets.
Collapse
Affiliation(s)
- Rami A. Namas
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
- Center for Inflammation and Regenerative Modeling, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Qi Mi
- Department of Sports Medicine and Nutrition, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Rajaie Namas
- Department of Internal Medicine, Division of Rheumatology, University of Michigan, Ann Arbor, Michigan
| | - Khalid Almahmoud
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Akram M. Zaaqoq
- Department of Critical Care Medicine, University of Pittsburgh, Pennsylvania
| | - Othman Abdul-Malak
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Nabil Azhar
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Judy Day
- Department of Mathematics, University of Tennessee, Knoxville, Tennessee
| | - Andrew Abboud
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ruben Zamora
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Timothy R. Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
- Center for Inflammation and Regenerative Modeling, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Yoram Vodovotz
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
- Center for Inflammation and Regenerative Modeling, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
| |
Collapse
|
277
|
Scudamore CL, Soilleux EJ, Karp NA, Smith K, Poulsom R, Herrington CS, Day MJ, Brayton CF, Bolon B, Whitelaw B, White ES, Everitt JI, Arends MJ. Recommendations for minimum information for publication of experimental pathology data: MINPEPA guidelines. J Pathol 2015; 238:359-67. [PMID: 26387837 DOI: 10.1002/path.4642] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/01/2015] [Accepted: 09/13/2015] [Indexed: 12/27/2022]
Abstract
Animal models are essential research tools in modern biomedical research, but there are concerns about their lack of reproducibility and the failure of animal data to translate into advances in human medical therapy. A major factor in improving experimental reproducibility is thorough communication of research methodologies. The recently published ARRIVE guidelines outline basic information that should be provided when reporting animal studies. This paper builds on ARRIVE by providing the minimum information needed in reports to allow proper assessment of pathology data gathered from animal tissues. This guidance covers aspects of experimental design, technical procedures, data gathering, analysis, and presentation that are potential sources of variation when creating morphological, immunohistochemical (IHC) or in situ hybridization (ISH) datasets. This reporting framework will maximize the likelihood that pathology data derived from animal experiments can be reproduced by ensuring that sufficient information is available to allow for replication of the methods and facilitate inter-study comparison by identifying potential interpretative confounders.
Collapse
Affiliation(s)
| | - Elizabeth J Soilleux
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Natasha A Karp
- Mouse Informatics Group, Wellcome Trust Sanger Institute, Cambridge, UK
| | - Ken Smith
- Pathology and Pathogen Biology, Royal Veterinary College, Hertfordshire, UK
| | - Richard Poulsom
- Blizard Institute, Queen Mary University of London, UK and Scientific Editor, The Journal of Pathology
| | - C Simon Herrington
- Edinburgh Cancer Research Centre, Institute of Genetics & Molecular Medicine, Edinburgh, UK and Editor in Chief, The Journal of Pathology
| | - Michael J Day
- School of Veterinary Sciences, University of Bristol, Langford, UK
| | - Cory F Brayton
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, USA
| | | | - Bruce Whitelaw
- The Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Eric S White
- Division of Pulmonary & Critical Care Medicine, Department of Medicine, University of Michigan Medical School, Ann Arbor, USA
| | | | - Mark J Arends
- Centre for Comparative Pathology, University of Edinburgh, Edinburgh, UK
| |
Collapse
|
278
|
Optimization of human dose prediction by using quantitative and translational pharmacology in drug discovery. Future Med Chem 2015; 7:2351-69. [PMID: 26599348 DOI: 10.4155/fmc.15.143] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In this perspective article, we explain how quantitative and translational pharmacology, when well-implemented, is believed to lead to improved clinical candidates and drug targets that are differentiated from current treatment options. Quantitative and translational pharmacology aims to build and continuously improve the quantitative relationship between drug exposure, target engagement, efficacy, safety and its interspecies relationship at every phase of drug discovery. Drug hunters should consider and apply these concepts to develop compounds with a higher probability of interrogating the clinical biological hypothesis. We offer different approaches to set an initial effective concentration or pharmacokinetic-pharmacodynamic target in man and to predict human pharmacokinetics that determine together the predicted human dose and dose schedule. All concepts are illustrated with ample literature examples.
Collapse
|
279
|
Rinaldi C, Malik B, Greensmith L. Targeted Molecular Therapies for SBMA. J Mol Neurosci 2015; 58:335-42. [PMID: 26576772 DOI: 10.1007/s12031-015-0676-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 11/01/2015] [Indexed: 12/11/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is a late-onset neuromuscular disease caused by a polyglutamine expansion in the androgen receptor gene which results in progressive spinal and bulbar motor neuron degeneration, and muscle atrophy. Although the causative genetic defect is known, until recently, the molecular pathogenesis of the disease was unclear, resulting in few, if any, targets for therapy development. However, over the past decade, our understanding of the pathomechanisms that play a role in SBMA has increased dramatically, and several of these pathways and mechanisms have now been investigated as possible therapeutic targets. In this review, we discuss some of the key pathomechanisms implicated in SBMA and describe some of the therapeutic strategies that have been tested in SBMA to date, which fall into four main categories: (i) gene silencing; (ii) protein quality control and/or increased protein degradation; (iii) androgen deprivation; and (iv) modulation of AR function. Finally, it is also now clear that in addition to a greater understanding of the molecular mechanisms that underlie disease, the development of an effective disease modifying therapy for SBMA will require the coordinated, collaborative effort of research teams with diverse areas of expertise, clinicians, pharmaceutical companies as well as patient groups.
Collapse
Affiliation(s)
- Carlo Rinaldi
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.
| | - Bilal Malik
- Sobell Department of Motor Neuroscience and Movement Disorders, Queen Square, London, WC1N 3BG, UK
| | - Linda Greensmith
- Sobell Department of Motor Neuroscience and Movement Disorders, Queen Square, London, WC1N 3BG, UK
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| |
Collapse
|
280
|
Gunn RN, Slifstein M, Searle GE, Price JC. Quantitative imaging of protein targets in the human brain with PET. Phys Med Biol 2015; 60:R363-411. [DOI: 10.1088/0031-9155/60/22/r363] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
281
|
Boisramé-Helms J, Toti F, Hasselmann M, Meziani F. Lipid emulsions for parenteral nutrition in critical illness. Prog Lipid Res 2015; 60:1-16. [PMID: 26416578 DOI: 10.1016/j.plipres.2015.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 08/10/2015] [Accepted: 08/19/2015] [Indexed: 12/26/2022]
Abstract
Critical illness is a life-threatening multisystem process that can result in significant morbidity and mortality. In most patients, critical illness is preceded by a physiological deterioration, characterized by a catabolic state and intense metabolic changes, resulting in malnutrition and impaired immune functions. In this context, parenteral lipid emulsions may modulate inflammatory and immune reactions, depending on their fatty acid composition. These effects appear to be based on complex modifications in the composition and structure of cell membranes, through eicosanoid and cytokine synthesis and by modulation of gene expression. The pathophysiological mechanisms underlying these fatty acid-induced immune function alterations in critical ill patients are however complex and partially understood. Indeed, despite a very abundant literature, experimental and clinical data remain contradictory. The optimization of lipid emulsion composition thus represents a major challenge for clinical medicine, to adequately modulate the inflammatory pathways. In the present review, we first address the metabolic response to aggression, the effects of parenteral lipid emulsions on inflammation and immunity, and finally the controversial place of these lipid emulsions during critical illness. The analysis furthermore highlights the pathophysiological mechanisms underlying the differential effects of lipid emulsions and their potential for improving the handling of critically ill patients.
Collapse
Affiliation(s)
- Julie Boisramé-Helms
- Service de Réanimation Médicale, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'Hôpital, 67000 Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg, EA 7293, Faculté de médecine, Université de Strasbourg, 4 rue Koeberlé, 67000 Strasbourg, France
| | - Florence Toti
- UMR 7213 CNRS, Faculté de Pharmacie, Université de Strasbourg, Illkirch, France
| | - Michel Hasselmann
- Service de Réanimation Médicale, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'Hôpital, 67000 Strasbourg, France
| | - Ferhat Meziani
- Service de Réanimation Médicale, Nouvel Hôpital Civil, Hôpitaux Universitaires de Strasbourg, 1 place de l'Hôpital, 67000 Strasbourg, France; Fédération de Médecine Translationnelle de Strasbourg, EA 7293, Faculté de médecine, Université de Strasbourg, 4 rue Koeberlé, 67000 Strasbourg, France.
| |
Collapse
|
282
|
de Vries RBM, Wever KE, Avey MT, Stephens ML, Sena ES, Leenaars M. The usefulness of systematic reviews of animal experiments for the design of preclinical and clinical studies. ILAR J 2015; 55:427-37. [PMID: 25541545 PMCID: PMC4276599 DOI: 10.1093/ilar/ilu043] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The question of how animal studies should be designed, conducted, and analyzed remains underexposed in societal debates on animal experimentation. This is not only a scientific but also a moral question. After all, if animal experiments are not appropriately designed, conducted, and analyzed, the results produced are unlikely to be reliable and the animals have in effect been wasted. In this article, we focus on one particular method to address this moral question, namely systematic reviews of previously performed animal experiments. We discuss how the design, conduct, and analysis of future (animal and human) experiments may be optimized through such systematic reviews. In particular, we illustrate how these reviews can help improve the methodological quality of animal experiments, make the choice of an animal model and the translation of animal data to the clinic more evidence-based, and implement the 3Rs. Moreover, we discuss which measures are being taken and which need to be taken in the future to ensure that systematic reviews will actually contribute to optimizing experimental design and thereby to meeting a necessary condition for making the use of animals in these experiments justified.
Collapse
|
283
|
Chen L, Cai C, Chen V, Lu X. Trans-species learning of cellular signaling systems with bimodal deep belief networks. Bioinformatics 2015; 31:3008-15. [PMID: 25995230 PMCID: PMC4668779 DOI: 10.1093/bioinformatics/btv315] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Revised: 04/21/2015] [Accepted: 05/17/2015] [Indexed: 12/20/2022] Open
Abstract
MOTIVATION Model organisms play critical roles in biomedical research of human diseases and drug development. An imperative task is to translate information/knowledge acquired from model organisms to humans. In this study, we address a trans-species learning problem: predicting human cell responses to diverse stimuli, based on the responses of rat cells treated with the same stimuli. RESULTS We hypothesized that rat and human cells share a common signal-encoding mechanism but employ different proteins to transmit signals, and we developed a bimodal deep belief network and a semi-restricted bimodal deep belief network to represent the common encoding mechanism and perform trans-species learning. These 'deep learning' models include hierarchically organized latent variables capable of capturing the statistical structures in the observed proteomic data in a distributed fashion. The results show that the models significantly outperform two current state-of-the-art classification algorithms. Our study demonstrated the potential of using deep hierarchical models to simulate cellular signaling systems. AVAILABILITY AND IMPLEMENTATION The software is available at the following URL: http://pubreview.dbmi.pitt.edu/TransSpeciesDeepLearning/. The data are available through SBV IMPROVER website, https://www.sbvimprover.com/challenge-2/overview, upon publication of the report by the organizers. CONTACT xinghua@pitt.edu SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
Collapse
Affiliation(s)
- Lujia Chen
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA 15237, USA
| | - Chunhui Cai
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA 15237, USA
| | - Vicky Chen
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA 15237, USA
| | - Xinghua Lu
- Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, PA 15237, USA
| |
Collapse
|
284
|
Secher JO, Callesen H, Freude KK, Hyttel P. Initial embryology and pluripotent stem cells in the pig--The quest for establishing the pig as a model for cell therapy. Theriogenology 2015; 85:162-71. [PMID: 26474684 DOI: 10.1016/j.theriogenology.2015.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 09/03/2015] [Accepted: 09/07/2015] [Indexed: 02/07/2023]
Abstract
The quest for porcine pluripotent stem cells (PSCs) was initiated in the early 90s. Initially, it was the intention to benefit from these cells for production of genetically modified pigs using homologous recombination followed by derivation of chimeric offspring; a technology that has been used to produce genetically modified mice since the mid-80s. However, no convincing reports on the generation of bona fide porcine embryonic stem cells or embryonic germ cells resulted from these activities, and with the advent of somatic cell nuclear transfer during the late 90s, alternative methods for creating genetically modified pigs emerged. Over the past years, renewed interest in porcine PSCs has sparked activities in deriving in particular porcine induced pluripotent stem cells to develop the pig as a faithful model for studying the potentials and risks associated with induced pluripotent stem cell-based human therapy. Here, we review the recent data on establishment of porcine PSCs and the differences in embryonic development between pig and mouse, which may be underlying factors for the continuing challenge to culture and maintain porcine PSCs.
Collapse
Affiliation(s)
- Jan O Secher
- Department of Large Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark.
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Kristine K Freude
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Poul Hyttel
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark.
| |
Collapse
|
285
|
Abstract
Animal models of osteoarthritis are extensively used for investigating disease pathways and for preclinical testing of novel therapies. Their predictive utility, however, has often been questioned, mainly because preclinical efficacy of novel therapeutics is poorly translated in clinical trials. In the current narrative review, we consider the preclinical models that were used to support undertaking clinical trials for disease-modifying osteoarthritis drugs, and compare outcomes between clinical and preclinical studies. We discuss this in light of the 1999 Food and Drug Administration draft guidelines for industry for use in the development of drugs, devices, and biological products intended for the treatment of osteoarthritis, which raised five considerations on the usefulness of osteoarthritis models. We systematically discuss what has been learnt regarding these five points since 1999, with emphasis on replicating distinct risk factors and subtypes of human osteoarthritis, and on comprehensive evaluation of the disease in animals, including pathology of all joint tissues, biomarker analysis, and assessment of pain and joint function. Finally, we discuss lessons learnt and propose some recommendations for how the evidence from preclinical research might be strengthened with a view to improving success in clinical translation.
Collapse
Affiliation(s)
- Anne-Marie Malfait
- Department of Medicine, Division of Rheumatology, and Department of Biochemistry, Rush University Medical Center, Chicago, IL, 60612, USA.
| | - Christopher B Little
- Raymond Purves Bone and Joint Research Laboratories, Kolling Institute of Medical Research, Institute of Bone and Joint Research, University of Sydney at Royal North Shore Hospital, St Leonards, NSW, 2065, Australia.
| |
Collapse
|
286
|
Abstract
In one of his earlier papers, Lex Cools stated that the 'concept of an impaired balance between the in series connected […] dopamine system, […] 5-HT system and […] noradrenaline system offers a single coherent and integrated theory of schizophrenia' (Cools, 1975). Since then, considerable attention has focused on the interaction between dopamine and 5-HT and it is now well accepted that most antipsychotics (especially the second-generation drugs) modulate both dopaminergic and serotonergic receptors. However, the vast majority of research has focused on the 5-HT1A, 5-HT2A and 5-HT2C receptors. In the present paper, we review the literature pertaining to the 5-HT3 receptor, the only ionotropic 5-HT receptor. We discuss both the interactions between 5-HT3 receptors and dopamine, and the animal and human literature investigating the role of 5-HT3 receptors in schizophrenia. The results show that the interactions between 5-HT3 receptors and dopamine are complex, but that 5-HT3 receptors do not have a strong influence on the positive symptoms of schizophrenia. However, when added to standard antipsychotic medication, several recent studies have found that 5-HT3 receptor antagonists can induce a statistically significantly improvement in negative and cognitive symptoms. The implications of these findings in relation to animal modelling and drug development are discussed.
Collapse
|
287
|
Begley DA, Sundberg JP, Krupke DM, Neuhauser SB, Bult CJ, Eppig JT, Morse HC, Ward JM. Finding mouse models of human lymphomas and leukemia's using the Jackson laboratory mouse tumor biology database. Exp Mol Pathol 2015; 99:533-6. [PMID: 26302176 DOI: 10.1016/j.yexmp.2015.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 07/07/2015] [Indexed: 01/22/2023]
Abstract
Many mouse models have been created to study hematopoietic cancer types. There are over thirty hematopoietic tumor types and subtypes, both human and mouse, with various origins, characteristics and clinical prognoses. Determining the specific type of hematopoietic lesion produced in a mouse model and identifying mouse models that correspond to the human subtypes of these lesions has been a continuing challenge for the scientific community. The Mouse Tumor Biology Database (MTB; http://tumor.informatics.jax.org) is designed to facilitate use of mouse models of human cancer by providing detailed histopathologic and molecular information on lymphoma subtypes, including expertly annotated, on line, whole slide scans, and providing a repository for storing information on and querying these data for specific lymphoma models.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Herbert C Morse
- Virology and Cellular Immunology Section, Laboratory of Immunogenetics, NIAID, NIH, Bethesda, MD USA
| | | |
Collapse
|
288
|
Abstract
Many animal models of migraine have been described. Some of them have been useful in the development of new therapies. All of them have their shortcomings. Animal models of chronic migraine have been relatively less frequently described. Whether a rigid distinction between episodic and chronic migraine is useful when their underlying pathophysiology is likely to be the same and that migraine frequency probably depends on complex polygenic influences remains to be determined. Any model of chronic migraine must reflect the chronicity of the disorder and be reliable and validated with pharmacological interventions. Future animal models of chronic migraine are likely to involve recurrent activation of the trigeminal nociceptive system. Valid models would provide a means for investigating pathophysiological mechanism of the transformation from episodic to chronic migraine and may also be used to test the efficacy of potential preventive medications.
Collapse
|
289
|
Sahota T, Sanderson I, Danhof M, Della Pasqua O. Model-based prediction of the acute and long-term safety profile of naproxen in rats. Br J Pharmacol 2015; 172:3861-74. [PMID: 25884765 PMCID: PMC4523341 DOI: 10.1111/bph.13167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 02/08/2015] [Accepted: 04/15/2015] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND AND PURPOSE Despite the increasing importance of biomarkers as predictors of drug effects, toxicology protocols continue to rely on the experimental evidence of adverse events (AEs) as a basis for establishing the link between indicators of safety and drug exposure. Furthermore, biomarkers may facilitate the translation of findings from animals to humans. Combined with a model-based approach, biomarker data have the potential to predict long-term effects arising from prolonged drug exposure. Here, we used naproxen as a paradigm to explore the feasibility of a biomarker-guided approach for the prediction of long-term AEs in humans. EXPERIMENTAL APPROACH An experimental toxicology protocol was set up for evaluating the effects of naproxen in rats, in which four active doses were tested (7.5, 15, 40 and 80 mg·kg(-1) ). In addition to AE monitoring and histology, a few blood samples were also collected for the assessment of drug exposure, TXB2 and PGE2 levels. Non-linear mixed effects modelling was used to analyse the data and identify covariate factors on the incidence and severity of AEs. KEY RESULTS Modelling results showed that besides drug exposure, maximum PGE2 inhibition and treatment duration were also predictors of gastrointestinal ulceration. Although PGE2 levels were clearly linked to the incidence rates, it appeared that ulceration severity is better predicted by measures of drug exposure. CONCLUSIONS AND IMPLICATIONS These results show that the use of a model-based approach provides the opportunity to integrate pharmacokinetics, pharmacodynamics and toxicity data, enabling optimization of the design, analysis and interpretation of toxicology experiments.
Collapse
Affiliation(s)
- Tarjinder Sahota
- Division of Pharmacology, Leiden Academic Centre for Drug ResearchLeiden, The Netherlands
| | - Ian Sanderson
- Division of Pharmacology, Leiden Academic Centre for Drug ResearchLeiden, The Netherlands
| | - Meindert Danhof
- Division of Pharmacology, Leiden Academic Centre for Drug ResearchLeiden, The Netherlands
| | - Oscar Della Pasqua
- Division of Pharmacology, Leiden Academic Centre for Drug ResearchLeiden, The Netherlands
- Clinical Pharmacology, Modelling and Simulation, GlaxoSmithKlineUxbridge, UK
- Clinical Pharmacology & Therapeutics, University College LondonLondon, UK
| |
Collapse
|
290
|
Hawkins P, Armstrong R, Boden T, Garside P, Knight K, Lilley E, Seed M, Wilkinson M, Williams RO. Applying refinement to the use of mice and rats in rheumatoid arthritis research. Inflammopharmacology 2015; 23:131-50. [PMID: 26168847 PMCID: PMC4508365 DOI: 10.1007/s10787-015-0241-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 06/24/2015] [Indexed: 12/19/2022]
Abstract
Rheumatoid arthritis (RA) is a painful, chronic disorder and there is currently an unmet need for effective therapies that will benefit a wide range of patients. The research and development process for therapies and treatments currently involves in vivo studies, which have the potential to cause discomfort, pain or distress. This Working Group report focuses on identifying causes of suffering within commonly used mouse and rat ‘models’ of RA, describing practical refinements to help reduce suffering and improve welfare without compromising the scientific objectives. The report also discusses other, relevant topics including identifying and minimising sources of variation within in vivo RA studies, the potential to provide pain relief including analgesia, welfare assessment, humane endpoints, reporting standards and the potential to replace animals in RA research.
Collapse
Affiliation(s)
- Penny Hawkins
- Research Animals Department, RSPCA, Wilberforce Way, Southwater, West Sussex, RH13 9RS, UK,
| | | | | | | | | | | | | | | | | |
Collapse
|
291
|
Abstract
The 2nd Cross Company Respiratory Symposium (CCRS), held in Horsham, U.K. in 2012, brought together representatives from across the pharmaceutical industry with expert academics, in the common interest of improving the design and translational predictiveness of in vivo models of respiratory disease. Organized by the respiratory representatives of the European Federation of Pharmaceutical Industries and Federations (EFPIA) group of companies involved in the EU-funded project (U-BIOPRED), the aim of the symposium was to identify state-of-the-art improvements in the utility and design of models of respiratory disease, with a view to improving their translational potential and reducing wasteful animal usage. The respiratory research and development community is responding to the challenge of improving translation in several ways: greater collaboration and open sharing of data, careful selection of the species, complexity and chronicity of the models, improved practices in preclinical research, continued refinement in models of respiratory diseases and their sub-types, greater understanding of the biology underlying human respiratory diseases and their sub-types, and finally greater use of human (and especially disease-relevant) cells, tissues and explants. The present review highlights these initiatives, combining lessons from the symposium and papers published in Clinical Science arising from the symposium, with critiques of the models currently used in the settings of asthma, idiopathic pulmonary fibrosis and COPD. The ultimate hope is that this will contribute to a more rational, efficient and sustainable development of a range of new treatments for respiratory diseases that continue to cause substantial morbidity and mortality across the world.
Collapse
|
292
|
Stegemann R, Buchner DA. Transgenerational inheritance of metabolic disease. Semin Cell Dev Biol 2015; 43:131-140. [PMID: 25937492 PMCID: PMC4626440 DOI: 10.1016/j.semcdb.2015.04.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/20/2015] [Accepted: 04/22/2015] [Indexed: 02/05/2023]
Abstract
Metabolic disease encompasses several disorders including obesity, type 2 diabetes, and dyslipidemia. Recently, the incidence of metabolic disease has drastically increased, driven primarily by a worldwide obesity epidemic. Transgenerational inheritance remains controversial, but has been proposed to contribute to human metabolic disease risk based on a growing number of proof-of-principle studies in model organisms ranging from Caenorhabditis elegans to Mus musculus to Sus scrofa. Collectively, these studies demonstrate that heritable risk is epigenetically transmitted from parent to offspring over multiple generations in the absence of a continued exposure to the triggering stimuli. A diverse assortment of initial triggers can induce transgenerational inheritance including high-fat or high-sugar diets, low-protein diets, various toxins, and ancestral genetic variants. Although the mechanistic basis underlying the transgenerational inheritance of disease risk remains largely unknown, putative molecules mediating transmission include small RNAs, histone modifications, and DNA methylation. Due to the considerable impact of metabolic disease on human health, it is critical to better understand the role of transgenerational inheritance of metabolic disease risk to open new avenues for therapeutic intervention and improve upon the current methods for clinical diagnoses and treatment.
Collapse
Affiliation(s)
- Rachel Stegemann
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States
| | - David A Buchner
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States; Department of Biological Chemistry, Case Western Reserve University, Cleveland, OH 44106, United States.
| |
Collapse
|
293
|
Graham ML, Schuurman HJ. Validity of animal models of type 1 diabetes, and strategies to enhance their utility in translational research. Eur J Pharmacol 2015; 759:221-30. [DOI: 10.1016/j.ejphar.2015.02.054] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 01/15/2015] [Accepted: 02/09/2015] [Indexed: 01/22/2023]
|
294
|
van Meer PJ, Graham ML, Schuurman HJ. The safety, efficacy and regulatory triangle in drug development: Impact for animal models and the use of animals. Eur J Pharmacol 2015; 759:3-13. [DOI: 10.1016/j.ejphar.2015.02.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 01/15/2015] [Accepted: 02/09/2015] [Indexed: 11/26/2022]
|
295
|
Yao YG, Chen YB, Liang B. The 3rd symposium on animal models of primates - the application of non-human primates to basic research and translational medicine. J Genet Genomics 2015; 42:339-41. [PMID: 26165501 DOI: 10.1016/j.jgg.2015.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 04/29/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Yong-Gang Yao
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, and Kunming Primate Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China.
| | - Yong-Bin Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, and Kunming Primate Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| | - Bin Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences & Yunnan Province, and Kunming Primate Research Center, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
| |
Collapse
|
296
|
Hughes L, Carton R, Minguzzi S, McEntee G, Deinum EE, O'Connell MJ, Parle-McDermott A. An active second dihydrofolate reductase enzyme is not a feature of rat and mouse, but they do have activity in their mitochondria. FEBS Lett 2015; 589:1855-62. [PMID: 25980602 DOI: 10.1016/j.febslet.2015.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/06/2015] [Accepted: 05/07/2015] [Indexed: 12/30/2022]
Abstract
The identification of a second functional dihydrofolate reductase enzyme in humans, DHFRL1, led us to consider whether this is also a feature of rodents. We demonstrate that dihydrofolate reductase activity is also a feature of the mitochondria in both rat and mouse but this is not due to a second enzyme. While our phylogenetic analysis revealed that RNA-mediated DHFR duplication events did occur across the mammal tree, the duplicates in brown rat and mouse are likely to be processed pseudogenes. Humans have evolved the need for two separate enzymes while laboratory rats and mice have just one.
Collapse
Affiliation(s)
- Linda Hughes
- Nutritional Genomics Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Robert Carton
- Bioinformatics and Molecular Evolution Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland; Centre for Scientific Computing and Complex Systems Modelling (SCI-SYM), Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Stefano Minguzzi
- Nutritional Genomics Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Gráinne McEntee
- Nutritional Genomics Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Eva E Deinum
- Institute of Evolutionary Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, United Kingdom
| | - Mary J O'Connell
- Bioinformatics and Molecular Evolution Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland; Centre for Scientific Computing and Complex Systems Modelling (SCI-SYM), Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Anne Parle-McDermott
- Nutritional Genomics Group, School of Biotechnology, Dublin City University, Glasnevin, Dublin 9, Ireland.
| |
Collapse
|
297
|
Hittinger M, Juntke J, Kletting S, Schneider-Daum N, de Souza Carvalho C, Lehr CM. Preclinical safety and efficacy models for pulmonary drug delivery of antimicrobials with focus on in vitro models. Adv Drug Deliv Rev 2015; 85:44-56. [PMID: 25453270 DOI: 10.1016/j.addr.2014.10.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/30/2014] [Accepted: 10/07/2014] [Indexed: 12/11/2022]
Abstract
New pharmaceutical formulations must be proven as safe and effective before entering clinical trials. Also in the context of pulmonary drug delivery, preclinical models allow testing of novel antimicrobials, reducing risks and costs during their development. Such models allow reducing the complexity of the human lung, but still need to reflect relevant (patho-) physiological features. This review focuses on preclinical pulmonary models, mainly in vitro models, to assess drug safety and efficacy of antimicrobials. Furthermore, approaches to investigate common infectious diseases of the respiratory tract, are emphasized. Pneumonia, tuberculosis and infections occurring due to cystic fibrosis are in focus of this review. We conclude that especially in vitro models offer the chance of an efficient and detailed analysis of new antimicrobials, but also draw attention to the advantages and limitations of such currently available models and critically discuss the necessary steps for their future development.
Collapse
|
298
|
Finkbeiner S, Frumkin M, Kassner PD. Cell-based screening: extracting meaning from complex data. Neuron 2015; 86:160-74. [PMID: 25856492 PMCID: PMC4457442 DOI: 10.1016/j.neuron.2015.02.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 09/23/2014] [Accepted: 01/22/2015] [Indexed: 01/23/2023]
Abstract
Unbiased discovery approaches have the potential to uncover neurobiological insights into CNS disease and lead to the development of therapies. Here, we review lessons learned from imaging-based screening approaches and recent advances in these areas, including powerful new computational tools to synthesize complex data into more useful knowledge that can reliably guide future research and development.
Collapse
Affiliation(s)
- Steven Finkbeiner
- Director of the Taube/Koret Center for Neurodegenerative Disease and the Hellman Family Foundation Program in Alzheimer's Disease Research, Gladstone Institute of Neurological Disease, San Francisco, CA 94158, USA; Departments of Neurology and Physiology, University of California, San Francisco, San Francisco, CA 94143, USA.
| | - Michael Frumkin
- Director of Engineering, Research, Google, Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA
| | - Paul D Kassner
- Director of Research, Amgen, Inc., 1120 Veterans Boulevard South, San Francisco, CA 94080, USA
| |
Collapse
|
299
|
Peters SM, Pothuizen HHJ, Spruijt BM. Ethological concepts enhance the translational value of animal models. Eur J Pharmacol 2015; 759:42-50. [PMID: 25823814 DOI: 10.1016/j.ejphar.2015.03.043] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 02/25/2015] [Accepted: 03/12/2015] [Indexed: 12/21/2022]
Abstract
The translational value of animal models is an issue of ongoing discussion. We argue that 'Refinement' of animal experiments is needed and this can be achieved by exploiting an ethological approach when setting up and conducting experiments. Ethology aims to assess the functional meaning of behavioral changes, due to experimental manipulation or treatment, in animal models. Although the use of ethological concepts is particularly important for studies involving the measurement of animal behavior (as is the case for most studies on neuro-psychiatric conditions), it will also substantially benefit other disciplines, such as those investigating the immune system or inflammatory response. Using an ethological approach also involves using more optimal testing conditions are employed that have a biological relevance to the animal. Moreover, using a more biological relevant analysis of the data will help to clarify the functional meaning of the modeled readout (e.g. whether it is psychopathological or adaptive in nature). We advocate for instance that more behavioral studies should use animals in group-housed conditions, including the recording of their ultrasonic vocalizations, because (1) social behavior is an essential feature of animal models for human 'social' psychopathologies, such as autism and schizophrenia, and (2) social conditions are indispensable conditions for appropriate behavioral studies in social species, such as the rat. Only when taking these elements into account, the validity of animal experiments and, thus, the translation value of animal models can be enhanced.
Collapse
Affiliation(s)
- Suzanne M Peters
- Faculty of Science, Utrecht University, Padualaan 8, NL-3584 CH Utrecht, The Netherlands; Delta Phenomics B.V., Nistelrooisebaan 3, NL-5374 RE Schaijk, The Netherlands.
| | - Helen H J Pothuizen
- Delta Phenomics B.V., Nistelrooisebaan 3, NL-5374 RE Schaijk, The Netherlands
| | - Berry M Spruijt
- Faculty of Science, Utrecht University, Padualaan 8, NL-3584 CH Utrecht, The Netherlands.
| |
Collapse
|
300
|
Graham ML, Prescott MJ. The multifactorial role of the 3Rs in shifting the harm-benefit analysis in animal models of disease. Eur J Pharmacol 2015; 759:19-29. [PMID: 25823812 PMCID: PMC4441106 DOI: 10.1016/j.ejphar.2015.03.040] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 02/05/2015] [Accepted: 03/12/2015] [Indexed: 12/12/2022]
Abstract
Ethics on animal use in science in Western society is based on utilitarianism, weighing the harms and benefits to the animals involved against those of the intended human beneficiaries. The 3Rs concept (Replacement, Reduction, Refinement) is both a robust framework for minimizing animal use and suffering (addressing the harms to animals) and a means of supporting high quality science and translation (addressing the benefits). The ambiguity of basic research performed early in the research continuum can sometimes make harm-benefit analysis more difficult since anticipated benefit is often an incremental contribution to a field of knowledge. On the other hand, benefit is much more evident in translational research aimed at developing treatments for direct application in humans or animals suffering from disease. Though benefit may be easier to define, it should certainly not be considered automatic. Issues related to model validity seriously compromise experiments and have been implicated as a major impediment in translation, especially in complex disease models where harms to animals can be intensified. Increased investment and activity in the 3Rs is delivering new research models, tools and approaches with reduced reliance on animal use, improved animal welfare, and improved scientific and predictive value.
Collapse
Affiliation(s)
- Melanie L Graham
- University of Minnesota, Department of Surgery, St. Paul, MN, USA; University of Minnesota, Veterinary Population Medicine Department, St. Paul, MN, USA.
| | - Mark J Prescott
- National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3Rs), London, UK
| |
Collapse
|