1
|
Soto-Navarro C, Ravilious C, Arnell A, de Lamo X, Harfoot M, Hill SLL, Wearn OR, Santoro M, Bouvet A, Mermoz S, Le Toan T, Xia J, Liu S, Yuan W, Spawn SA, Gibbs HK, Ferrier S, Harwood T, Alkemade R, Schipper AM, Schmidt-Traub G, Strassburg B, Miles L, Burgess ND, Kapos V. Mapping co-benefits for carbon storage and biodiversity to inform conservation policy and action. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190128. [PMID: 31983334 PMCID: PMC7017768 DOI: 10.1098/rstb.2019.0128] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2019] [Indexed: 12/21/2022] Open
Abstract
Integrated high-resolution maps of carbon stocks and biodiversity that identify areas of potential co-benefits for climate change mitigation and biodiversity conservation can help facilitate the implementation of global climate and biodiversity commitments at local levels. However, the multi-dimensional nature of biodiversity presents a major challenge for understanding, mapping and communicating where and how biodiversity benefits coincide with climate benefits. A new integrated approach to biodiversity is therefore needed. Here, we (a) present a new high-resolution map of global above- and below-ground carbon stored in biomass and soil, (b) quantify biodiversity values using two complementary indices (BIp and BIr) representing proactive and reactive approaches to conservation, and (c) examine patterns of carbon-biodiversity overlap by identifying 'hotspots' (20% highest values for both aspects). Our indices integrate local diversity and ecosystem intactness, as well as regional ecosystem intactness across the broader area supporting a similar natural assemblage of species to the location of interest. The western Amazon Basin, Central Africa and Southeast Asia capture the last strongholds of highest local biodiversity and ecosystem intactness worldwide, while the last refuges for unique biological communities whose habitats have been greatly reduced are mostly found in the tropical Andes and central Sundaland. There is 38 and 5% overlap in carbon and biodiversity hotspots, for proactive and reactive conservation, respectively. Alarmingly, only around 12 and 21% of these proactive and reactive hotspot areas, respectively, are formally protected. This highlights that a coupled approach is urgently needed to help achieve both climate and biodiversity global targets. This would involve (1) restoring and conserving unprotected, degraded ecosystems, particularly in the Neotropics and Indomalaya, and (2) retaining the remaining strongholds of intactness. This article is part of the theme issue 'Climate change and ecosystems: threats, opportunities and solutions'.
Collapse
Affiliation(s)
- C. Soto-Navarro
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
- Luc Hoffmann Institute, Rue Mauverney 28, 1196 Gland, Switzerland
| | - C. Ravilious
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| | - A. Arnell
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| | - X. de Lamo
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| | - M. Harfoot
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| | - S. L. L. Hill
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
- Natural History Museum, Cromwell Road, London SW7 5BD, UK
| | - O. R. Wearn
- Institute of Zoology, Zoological Society of London, Regent's Park, London NW1 4RY, UK
| | - M. Santoro
- Gamma Remote Sensing, Worbstrasse 225, 3073 Gümligen, Switzerland
| | - A. Bouvet
- CESBIO, Edouard Belin, 31401 Toulouse, France
| | - S. Mermoz
- GlobEO, Avenue Saint-Exupery, 31400 Toulouse, France
| | - T. Le Toan
- CESBIO, Edouard Belin, 31401 Toulouse, France
| | - J. Xia
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - S. Liu
- National Engineering Laboratory for Applied Technology of Forestry and Ecology in Southern China, College of Biological Science and Technology, Central South University of Forest and Technology, Changsha 410004, People's Republic of China
| | - W. Yuan
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, People's Republic of China
- State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
| | - S. A. Spawn
- Department of Geography, University of Wisconsin-Madison, Madison, WI, USA
- Centre for Sustainability and the Global Environment, University of Wisconsin-Madison, Madison, WI, USA
| | - H. K. Gibbs
- Department of Geography, University of Wisconsin-Madison, Madison, WI, USA
- Centre for Sustainability and the Global Environment, University of Wisconsin-Madison, Madison, WI, USA
| | - S. Ferrier
- CSIRO, GPO BOX 1700, Canberra, Australian Capital Territory, Australia
| | - T. Harwood
- CSIRO, GPO BOX 1700, Canberra, Australian Capital Territory, Australia
| | - R. Alkemade
- PBL Netherlands Environmental Assessment Agency, PO Box 30314, 2500 GH The Hague, The Netherlands
| | - A. M. Schipper
- PBL Netherlands Environmental Assessment Agency, PO Box 30314, 2500 GH The Hague, The Netherlands
- Department of Environmental Science, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlands
| | - G. Schmidt-Traub
- UN Sustainable Development Solutions Network, 75009 Paris, France
| | - B. Strassburg
- International Institute for Sustainability (IIS), CEP: 22460-320, Rio de Janeiro, Brazil
| | - L. Miles
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| | - N. D. Burgess
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
- Centre for Macroecology, Evolution and Climate, The Natural History Museum, University of Copenhagen, Copenhagen, Denmark
| | - V. Kapos
- UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK
| |
Collapse
|
2
|
Nowrouzi S, Bush A, Harwood T, Staunton KM, Robson SKA, Andersen AN. Incorporating habitat suitability into community projections: Ant responses to climate change in the Australian Wet Tropics. DIVERS DISTRIB 2019. [DOI: 10.1111/ddi.12935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Somayeh Nowrouzi
- Zoology and Ecology, College of Science and Engineering James Cook University Townsville Queensland Australia
- CSIRO Land and Water Darwin Northern Territory Australia
- CSIRO Land and Water Canberra Australian Capital Territory Australia
| | - Alex Bush
- CSIRO Land and Water Canberra Australian Capital Territory Australia
- Environment and Climate Change Canada University of New Brunswick Fredericton New Brunswick Canada
| | - Tom Harwood
- CSIRO Land and Water Canberra Australian Capital Territory Australia
| | - Kyran M. Staunton
- College of Public Health, Medical and Veterinary Sciences James Cook University Cairns Queensland Australia
- Australian Institute of Tropical Health and Medicine James Cook University Cairns Queensland Australia
| | - Simon K. A. Robson
- School of Health, Medical and Applied Sciences Central Queensland University Townsville Queensland Australia
- School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
| | - Alan N. Andersen
- CSIRO Land and Water Darwin Northern Territory Australia
- Research Institute for the Environment and Livelihoods Charles Darwin University Darwin Northern Territory Australia
| |
Collapse
|
3
|
Rambla-Alegre M, Leonardo S, Barguil Y, Flores C, Caixach J, Campbell K, Elliott CT, Boundy MJ, Harwood T, Maillaud C, Campàs M, Diogene J. Dépistage rapide et confirmation du profil multitoxines des tétrodotoxines et de ses analogues dans les liquides biologiques. Toxicologie Analytique et Clinique 2018. [DOI: 10.1016/j.toxac.2018.04.077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
4
|
Harwood T, Khan E, Niang P, Mustafa A, Kangaharan N, Ilton M. An Article on Investigative Pitfalls in Pulmonary Hypertension. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
5
|
Cachalia T, Joseph A, Harwood T. Hypothermia and near-drowning associated with life-threatening injuries: A remarkable recovery: A case report. Trauma Case Rep 2016; 5:1-6. [PMID: 29942847 PMCID: PMC6013007 DOI: 10.1016/j.tcr.2016.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2016] [Indexed: 11/26/2022] Open
Abstract
A young male suffered multiple severe injuries after a fall and near-drowning. On presentation to the emergency department (ED), he was in a critical and unstable condition and his chances of survival were deemed very low. This case illustrates the management of the hypothermic multi-trauma patient and the remarkable recovery made possible by a high standard of care.
Collapse
Affiliation(s)
- Tariq Cachalia
- Trauma Department, Royal North Shore Hospital, Reserve Rd, St Leonards, Sydney, Australia
| | - Anthony Joseph
- Trauma Department, Royal North Shore Hospital, Reserve Rd, St Leonards, Sydney, Australia
| | - Tom Harwood
- Trauma Department, Royal North Shore Hospital, Reserve Rd, St Leonards, Sydney, Australia
| |
Collapse
|
6
|
Bush A, Harwood T, Hoskins AJ, Mokany K, Ferrier S. Current Uses of Beta-Diversity in Biodiversity Conservation: A response to Socolar et al. Trends Ecol Evol 2016; 31:337-338. [DOI: 10.1016/j.tree.2016.02.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 02/25/2016] [Indexed: 01/25/2023]
|
7
|
Hoskins AJ, Bush A, Gilmore J, Harwood T, Hudson LN, Ware C, Williams KJ, Ferrier S. Downscaling land-use data to provide global 30″ estimates of five land-use classes. Ecol Evol 2016; 6:3040-55. [PMID: 27069595 PMCID: PMC4814442 DOI: 10.1002/ece3.2104] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/06/2016] [Accepted: 03/07/2016] [Indexed: 11/08/2022] Open
Abstract
Land-use change is one of the biggest threats to biodiversity globally. The effects of land use on biodiversity manifest primarily at local scales which are not captured by the coarse spatial grain of current global land-use mapping. Assessments of land-use impacts on biodiversity across large spatial extents require data at a similar spatial grain to the ecological processes they are assessing. Here, we develop a method for statistically downscaling mapped land-use data that combines generalized additive modeling and constrained optimization. This method was applied to the 0.5° Land-use Harmonization data for the year 2005 to produce global 30″ (approx. 1 km(2)) estimates of five land-use classes: primary habitat, secondary habitat, cropland, pasture, and urban. The original dataset was partitioned into 61 bio-realms (unique combinations of biome and biogeographical realm) and downscaled using relationships with fine-grained climate, land cover, landform, and anthropogenic influence layers. The downscaled land-use data were validated using the PREDICTS database and the geoWiki global cropland dataset. Application of the new method to all 61 bio-realms produced global fine-grained layers from the 2005 time step of the Land-use Harmonization dataset. Coarse-scaled proportions of land use estimated from these data compared well with those estimated in the original datasets (mean R (2): 0.68 ± 0.19). Validation with the PREDICTS database showed the new downscaled land-use layers improved discrimination of all five classes at PREDICTS sites (P < 0.0001 in all cases). Additional validation of the downscaled cropping layer with the geoWiki layer showed an R (2) improvement of 0.12 compared with the Land-use Harmonization data. The downscaling method presented here produced the first global land-use dataset at a spatial grain relevant to ecological processes that drive changes in biodiversity over space and time. Integrating these data with biodiversity measures will enable the reporting of land-use impacts on biodiversity at a finer resolution than previously possible. Furthermore, the general method presented here could be useful to others wishing to downscale similarly constrained coarse-resolution data for other environmental variables.
Collapse
Affiliation(s)
| | - Alex Bush
- CSIRO Land and Water Canberra ACT 2601 Australia
| | | | - Tom Harwood
- CSIRO Land and Water Canberra ACT 2601 Australia
| | - Lawrence N Hudson
- Department of Life Sciences Natural History Museum Cromwell Road London SW7 5BD UK
| | - Chris Ware
- CSIRO Land and Water Canberra ACT 2601 Australia
| | | | | |
Collapse
|
8
|
Hatfield-Dodds S, Schandl H, Adams PD, Baynes TM, Brinsmead TS, Bryan BA, Chiew FHS, Graham PW, Grundy M, Harwood T, McCallum R, McCrea R, McKellar LE, Newth D, Nolan M, Prosser I, Wonhas A. Australia is ‘free to choose’ economic growth and falling environmental pressures. Nature 2015; 527:49-53. [DOI: 10.1038/nature16065] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 10/09/2015] [Indexed: 11/09/2022]
|
9
|
Potter C, Harwood T, Knight J, Tomlinson I. Learning from history, predicting the future: the UK Dutch elm disease outbreak in relation to contemporary tree disease threats. Philos Trans R Soc Lond B Biol Sci 2011; 366:1966-74. [PMID: 21624917 PMCID: PMC3130388 DOI: 10.1098/rstb.2010.0395] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Expanding international trade and increased transportation are heavily implicated in the growing threat posed by invasive pathogens to biodiversity and landscapes. With trees and woodland in the UK now facing threats from a number of disease systems, this paper looks to historical experience with the Dutch elm disease (DED) epidemic of the 1970s to see what can be learned about an outbreak and attempts to prevent, manage and control it. The paper draws on an interdisciplinary investigation into the history, biology and policy of the epidemic. It presents a reconstruction based on a spatial modelling exercise underpinned by archival research and interviews with individuals involved in the attempted management of the epidemic at the time. The paper explores what, if anything, might have been done to contain the outbreak and discusses the wider lessons for plant protection. Reading across to present-day biosecurity concerns, the paper looks at the current outbreak of ramorum blight in the UK and presents an analysis of the unfolding epidemiology and policy of this more recent, and potentially very serious, disease outbreak. The paper concludes by reflecting on the continuing contemporary relevance of the DED experience at an important juncture in the evolution of plant protection policy.
Collapse
Affiliation(s)
- Clive Potter
- Centre for Environmental Policy, Imperial College London, Mechanical Engineering Building, 3rd Floor, Exhibition Road, South Kensington, London SW7 2AZ, UK.
| | | | | | | |
Collapse
|
10
|
Moslonka-Lefebvre M, Finley A, Dorigatti I, Dehnen-Schmutz K, Harwood T, Jeger MJ, Xu X, Holdenrieder O, Pautasso M. Networks in plant epidemiology: from genes to landscapes, countries, and continents. Phytopathology 2011; 101:392-403. [PMID: 21062110 DOI: 10.1094/phyto-07-10-0192] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
There is increasing use of networks in ecology and epidemiology, but still relatively little application in phytopathology. Networks are sets of elements (nodes) connected in various ways by links (edges). Network analysis aims to understand system dynamics and outcomes in relation to network characteristics. Many existing natural, social, and technological networks have been shown to have small-world (local connectivity with short-cuts) and scale-free (presence of super-connected nodes) properties. In this review, we discuss how network concepts can be applied in plant pathology from the molecular to the landscape and global level. Wherever disease spread occurs not just because of passive/natural dispersion but also due to artificial movements, it makes sense to superimpose realistic models of the trade in plants on spatially explicit models of epidemic development. We provide an example of an emerging pathosystem (Phytophthora ramorum) where a theoretical network approach has proven particularly fruitful in analyzing the spread of disease in the UK plant trade. These studies can help in assessing the future threat posed by similar emerging pathogens. Networks have much potential in plant epidemiology and should become part of the standard curriculum.
Collapse
|
11
|
Carrasco L, Mumford J, MacLeod A, Harwood T, Grabenweger G, Leach A, Knight J, Baker R. Unveiling human-assisted dispersal mechanisms in invasive alien insects: Integration of spatial stochastic simulation and phenology models. Ecol Modell 2010. [DOI: 10.1016/j.ecolmodel.2010.05.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Allainguillaume J, Harwood T, Ford CS, Cuccato G, Norris C, Allender CJ, Welters R, King GJ, Wilkinson MJ. Rapeseed cytoplasm gives advantage in wild relatives and complicates genetically modified crop biocontainment. New Phytol 2009; 183:1201-1211. [PMID: 19496946 DOI: 10.1111/j.1469-8137.2009.02877.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Biocontainment methods for genetically modified crops closest to commercial reality (chloroplast transformation, male sterility) would be compromised (in absolute terms) by seed-mediated gene flow leading to chloroplast capture. Even in these circumstances, however, it can be argued that biocontainment still represses transgene movement, with the efficacy depending on the relative frequency of seed- and pollen-mediated gene flow. In this study, we screened for crop-specific chloroplast markers from rapeseed (Brassica napus) amongst sympatric and allopatric populations of wild B. oleracea in natural cliff-top populations and B. rapa in riverside and weedy populations. We found only modest crop chloroplast presence in wild B. oleracea and in weedy B. rapa, but a surprisingly high incidence in sympatric (but not in allopatric) riverside B. rapa populations. Chloroplast inheritance models indicate that elevated crop chloroplast acquisition is best explained if crop cytoplasm confers selective advantage in riverside B. rapa populations. Our results therefore imply that chloroplast transformation may slow transgene recruitment in two settings, but actually accelerate transgene spread in a third. This finding suggests that the appropriateness of chloroplast transformation for biocontainment policy depends on both context and geographical location.
Collapse
Affiliation(s)
- J Allainguillaume
- School of Biological Sciences, The University of Reading, Reading, Berkshire RG6 6AS, UK
| | - T Harwood
- Centre for Environmental Policy, Imperial College London, London SL5 7PY, UK
| | - C S Ford
- School of Biological Sciences, The University of Reading, Reading, Berkshire RG6 6AS, UK
| | - G Cuccato
- School of Biological Sciences, The University of Reading, Reading, Berkshire RG6 6AS, UK
| | - C Norris
- National Institute of Agricultural Botany (NIAB), Cambridge, Cambridgeshire CB3 0LE, UK
| | - C J Allender
- Warwick HRI, Wellesbourne, Warwickshire CV35 9EF, UK
| | - R Welters
- Natural Environment Research Council, Swindon, Berkshire SN2 1EU, UK
| | - G J King
- Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - M J Wilkinson
- School of Biological Sciences, The University of Reading, Reading, Berkshire RG6 6AS, UK
- Present address: Institute of Biological, Environmental and Rural Sciences, Edward Llwyd Building, Aberystwyth University, Aberystwyth SY23 3DA, UK
| |
Collapse
|
13
|
Allan CM, Robson M, Harwood T, Handelsman DJ. 169. SERTOLI CELL-SPECIFIC DISRUPTION OF THE ANDROGEN RECEPTOR DNA-BINDING DOMAIN REVEALS DIFFERENTIAL TEMPORAL CONTROL OF DISTINCT ANDROGEN-REGULATED GENES. Reprod Fertil Dev 2009. [DOI: 10.1071/srb09abs169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Androgen receptor (AR) actions are vital for spermatogenesis. However, in postnatal development male germ cells do not express AR, highlighting its key role in testicular somatic cells. We recently used a Cre-loxP strategy to determine the in vivo requirement of AR DNA-binding in Sertoli cell (SC) function. Transgenic (Tg) mice with Cre expression targeted by SC-specific AMH or Abp promoters were crossed with floxed-Ar (Arflox) mice for Cre-loxP inframe deletion of Ar exon 3, which encodes a zinc finger essential for the DNA-binding domain (DBD). SC-specific mutated ARΔex3 (SCARΔex3) produced infertile AMH.SCARΔex3 and Abp.SCARΔex3 males. Testes from adult homozygous TgCre(+/+) AMH.SCARΔex3 or Abp.SCARΔex3 males were 30% of normal size and exhibited meiotic arrest, whereas testes from hemizygous TgCre(+/–) Abp.SCARΔex3 males were larger (47% normal) with more postmeiotic germ cell development. Despite marked Leydig cell hypertrophy, testicular expression of the adult Leydig marker Hsd3b6 (RT-PCR) and normal intratesticular testosterone levels (LC-MS/MS) in SCARΔex3 males indicated the presence of morphologically distinct but functional adult Leydig cells. SC-specific mutated AR Δex3 was predicted to disrupt classical AR-regulated pathways via loss of direct DNA interaction. Androgen-repressed testicular Ngfr expression (known to be via non-classical AR pathways) was not upregulated in SCARΔex3 testes, suggesting maintenance of a non-classical mechanism independent of AR-DBD. In contrast, SC-specific Rhox5 and Eppin transcription, regulated by divergent or classical androgen-response elements respectively, were both decreased in postnatal SCARΔex3 vs. control testes, demonstrating SC-specific AR function as early as postnatal day 5. However, Rhox5 expression declined dose-dependently, whereas Eppin expression increased, in adult TgCre(+/−) and TgCre(+/+) SCARΔex3 testes, revealing differential temporal control for distinct AR-regulated transcripts. Thus, our SCARΔex3 paradigm displayed dose-dependent TgCre-disruption of meiotic competence and post-meiotic development as well as gene expression, and represents a unique model to selectively differentiate AR-regulated genes.
Collapse
|
14
|
Harwood T. Response to Wilkinson & Tepfer's "Fitness and beyond: preparing for the arrival of GM crops with ecologically important novel characters". Fuzzy reasoning and unacceptable change: defining and assessing an ambiguous endpoint. Environ Biosafety Res 2009; 8:15-16. [PMID: 19419649 DOI: 10.1051/ebr/2009004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- Tom Harwood
- Centre for Environmental Policy, Imperial College London, Silwood Park, Ascot, Berkshire SL5 7PY, UK.
| |
Collapse
|
15
|
Sosis M, Dillon F, Harwood T. A comparison of CO2 laser ignition of the Xomed, PVC and rubber tracheal tubes. Can J Anaesth 1990; 37:S87. [PMID: 2361324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- M Sosis
- Department of Anesthesiology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois
| | | | | |
Collapse
|
16
|
Chase AR, Kelley PR, Taunton-Rigby A, Jones RT, Harwood T. Quantitation of cannabinoids in biological fluids by radioimmunoassay. NIDA Res Monogr 1976:1-9. [PMID: 987538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A tritium based radioimmunoassay for delta9THC and its metabolites has been developed for the use of investigators studying the epidemiological, medical, clinical, and research aspects of cannabis use. The assay is sufficiently sensitive to detect cannabinoids in the urine of marijuana smokers for several days after their last exposure to the drug. The results obtained from a 28 day study indicate that the assay reflects the administration and removal of oral doses of THC. The specificity of the antisera, as determined in cross reactivity studies, allows not only the assay of metabolites in biological samples without interference from other drugs, but also the evaluation of extracts of other kinds of samples which may contain unmetabolized delta9THC. The technique of radioimmunoassay has many advantages over other methods of analysis. It is simple to perform and can be readily applied to the rapid analysis of large numbers of samples. It can be used in the direct analysis of physiological fluids and other biological samples which ordinarily have to be processed before other techniques can be applied. The method is non-destructive abd obviates the need to use radiolabelled drugs in man during metabolic and other studies. This radioimmunoassay has been designed with particular emphasis on ease of use by other investigators. We anticipate that it will prove useful to investigators and scientists for determining the absence, or presence and amount, of THC metabolite in a biological specimen, for epidemiologists in determining the full extent of cannabis use and to the medical/clinical community for establishing the minimum effective dose of delta9THC for each patient. The widespread application of a single method of analysis should also remove a great deal of the controversy surrounding marijuana studies performed to date.
Collapse
|