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Welti R, Chinotti M, Walsh O, Arcus M, Asgari J, Phillips K, Wallace J, Do L, Moynihan P, Silva M. Oral health messages for Australia: A national consensus statement. Aust Dent J 2023; 68:247-254. [PMID: 37665214 DOI: 10.1111/adj.12973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2023] [Indexed: 09/05/2023]
Abstract
BACKGROUND Oral health promotion initiatives must be evidence-based and consistent with broader health messaging. The Oral Health Messages for the Australian Public were first produced in 2009 and sought to enable a focused, and strategic approach to oral health promotion in Australia. As the evidence base and needs of the Australian population have since changed, this consensus statement was updated in 2022-2023. METHODS The process of updating the messages consisted of 3 phases (preparatory phase, the Delphi technique, final revision phase). The preparatory phase included public and expert consultation, an umbrella review of published scientific literature and review of available recommendations, policies and guidelines. The Delphi technique used in this study was guided by Guidance on Conducting and REporting DElphi Studies (CREDES) and included 2 voting rounds. There were 70 experts in round 1 and 60 experts in round 2. Delphi participants comprised of experts from a variety of fields to ensure diversity and inclusion, balance expertise and maximize stakeholder representation. Consensus was defined as 75% agreement. RESULTS A total of 11 messages were included in the 2022 update of Oral Health Messages for Australia. CONCLUSION The updated oral health messages will support oral health promotion policy and activity at both individual and population level to improve the oral health of Australians.
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Affiliation(s)
- R Welti
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - M Chinotti
- Australian Dental Association, St Leonards, New South Wales, Australia
| | - O Walsh
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - M Arcus
- Royal Australian College of General Practitioners, East Melbourne, Victoria, Australia
| | - J Asgari
- Consumer Health Forum, Deakin, Australian Capital Territory, Australia
| | - K Phillips
- Queensland Health, Brisbane, Queensland, Australia
| | - J Wallace
- University of Newcastle, Newcastle, New South Wales, Australia
- University of Sydney, Camperdown, New South Wales, Australia
| | - L Do
- University of Queensland, St Lucia, Queensland, Australia
| | - P Moynihan
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - M Silva
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Parkville, Victoria, Australia
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Welti R, Chinotti M, Walsh O, Arcus M, Asgari J, Phillips K, Wallace J, Do L, Moynihan P, Silva M. Oral health messages for Australia: a national consensus statement. Aust Dent J 2023; 68:303-304. [PMID: 38009270 DOI: 10.1111/adj.13003] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2023] [Indexed: 11/28/2023]
Affiliation(s)
- R Welti
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - M Chinotti
- Australian Dental Association, St Leonards, Sydney, Australia
| | - O Walsh
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - M Arcus
- Royal Australian College of General Practitioners, East Melbourne, Victoria, Australia
| | - J Asgari
- Consumer Health Forum, Deakin, Australian Capital Territory, Australia
| | - K Phillips
- Queensland Health, Brisbane, Queensland, Australia
| | - J Wallace
- University of Newcastle, Callaghan, New South Wales, Australia
- University of Sydney, Sydney, New South Wales, Australia
| | - L Do
- University of Queensland, Saint Lucia, Queensland, Australia
| | - P Moynihan
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - M Silva
- Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia
- Inflammatory Origins, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
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Do L, Brown C, Luo NM, Zhang C, Esiason G, Sjoberg J, Psoter K, Sabadosa K, Ren C. P040 Implementation and preliminary experiences of the HERO-2 real-world research study in patients with cystic fibrosis. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00373-3] [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: 10/18/2022]
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Vasantavada PV, Hearnshaw S, Do L, Vernazza CR, Zohoori F. Editorial - Community Water fluoridation. Community Dent Health 2021; 38:158-160. [PMID: 34473431 DOI: 10.1922/cdh_sept21editorial03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Since the discovery of the caries preventive benefits of fluoride, it has been the cornerstone of preventive programs for children and adults. Water fluoridation, the controlled addition of a precise amount of fluoride to community water systems to the level beneficial for dental health, is one of the most effective and safe means to deliver fluoride (McDonagh et al., 2000; National Health and Medical Research Council, 2017). In 1999, the US Centers for Disease Control and Prevention (CDC) named fluoridation of drinking water as one of ten great public health achievements in the 20th Century, alongside vaccination, control of infectious diseases, a decline in death from coronary heart disease and other accomplishments (CDC, 2011). This is a remarkable recognition of the impact of dental conditions and the importance of a dental preventive program.
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Affiliation(s)
- P V Vasantavada
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK
| | - S Hearnshaw
- Coordinator, National Community Water Fluoridation Network, UK
| | - L Do
- Director of Research, School of Dentistry, The University of Queensland, Brisbane, Australia
| | - C R Vernazza
- School of Dental Sciences, Newcastle University, UK
| | - F Zohoori
- School of Health and Life Sciences, Teesside University, Middlesbrough, UK
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Jamieson L, Do L, Kapellas K, Chrisopoulos S, Luzzi L, Brennan D, Ju X. Oral health changes among Indigenous and non-Indigenous Australians: findings from two national oral health surveys. Aust Dent J 2021; 66 Suppl 1:S48-S55. [PMID: 33899961 DOI: 10.1111/adj.12849] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/16/2021] [Accepted: 04/18/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Historically, Indigenous Australians experienced poorer oral health than non-Indigenous Australians. We aimed to ascertain if Indigenous Australian oral health improved relative to non-Indigenous oral health between the 2004-06 and 2017-18 National Surveys of Adult Oral Health (NSAOH). METHODS Both NSAOHs were population-based cross-sectional surveys of Australian adults aged 15 years or more. In both surveys, representative samples of adults were drawn through a three-stage, stratified sample design within metropolitan and regional areas in each state/territory. Frequencies of Indigenous and non-Indigenous self-reported and clinical oral health variables were ascertained, and differences were calculated between the 2004-06 and 2017-18 NSAOHs. Ninety-five per cent confidence intervals were calculated and weights were used to account for the complex sampling methodology of both surveys. RESULTS In 2004-06, 229 Indigenous and 13 882 non-Indigenous Australians provided self-report data, and 87 and 5418 of these had dental examinations, respectively. In 2017-18, 334 Indigenous and 15 392 non-Indigenous Australians provided self-report data, and 84 and 4937 of them had dental examinations respectively. Between the surveys, relative to their non-Indigenous counterparts, Indigenous Australians experienced greater levels of: inadequate dentition (4.2%), experience of toothache (4.8%), problem-based dental attendance (4.5%) and 1+ teeth decayed, missing or filled (4.4%). CONCLUSIONS The gap between poor self-reported and clinical oral health between Indigenous and non-Indigenous Australians was greater in the more recent survey.
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Affiliation(s)
- L Jamieson
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - L Do
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - K Kapellas
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - S Chrisopoulos
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - L Luzzi
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - D Brennan
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - X Ju
- Australian Research Centre for Population Oral Health, Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
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Abstract
INTRODUCTION Our ability to address child oral health inequalities would be greatly facilitated by a more nuanced understanding of whether underlying disease experience or treatment opportunities account for a larger share of differences between social groups. This is particularly relevant in the context of population subgroups who are socially marginalized, such as Australia's Indigenous population. The decayed, missing, and filled (dmf) surfaces index is at once a reflection of dental caries experience (d) and its management (m and f). OBJECTIVES To 1) describe socioeconomic inequalities in dental caries experience and its management among Indigenous and non-Indigenous children and 2) compare these inequalities using absolute and relative measures. METHODS Data were from the Australian National Child Oral Health Study 2012-2014. Absolute and relative income inequalities were assessed for overall dmfs and its individual components (ds, ms, fs) using adjusted means and health disparity indices (Slope Index of Inequality [SII] and Relative Index of Inequality [RII]). RESULTS Mean dmfs among Indigenous children aged 5 to 10 y was 6.4 (95% confidence interval [CI], 5.4-7.4), ranging from 2.3 in the highest to 9.1 in the lowest income group. Mean dmfs among non-Indigenous children was 2.9 (95% CI, 2.8-3.1), ranging from 1.9 in the highest to 4.2 in the lowest income group. Age- and gender-adjusted social gradients for Indigenous children were evident across all dmfs components but were particularly notable for ds (SII = -4.6, RII = -1.7) and fs (SII = -3.2, RII = -1.5). The social gradients for non-Indigenous children were much lower in magnitude: ds (SII = -1.8, RII = -1.6) and fs (SII = -0.7, RII = -0.5). CONCLUSION Our findings suggest that socioeconomic disadvantage may translate into both higher disease experience and increased use of dental services for both Indigenous and non-Indigenous groups, with the social gradients being much more amplified among Indigenous children. KNOWLEDGE TRANSFER STATEMENT The findings of this study demonstrate the magnitude of disparities in dental caries among children by population groups in Australia. Our results suggest that the relationship between socioeconomic disadvantage and poor oral health is more deleterious among Indigenous than non-Indigenous children. Tackling upstream determinants of health might not only affect population patterns of health and disease but also mitigate the overwhelming racial inequalities in oral health between Indigenous and non-Indigenous Australians.
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Affiliation(s)
- D Haag
- Australian Research Centre for Population Oral Health (ARCPOH), Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - H Schuch
- Postgraduate Program in Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - D Ha
- Australian Research Centre for Population Oral Health (ARCPOH), Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - L Do
- Australian Research Centre for Population Oral Health (ARCPOH), Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - L Jamieson
- Australian Research Centre for Population Oral Health (ARCPOH), Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
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Dimitropoulos Y, Holden A, Gwynne K, Do L, Byun R, Sohn W. Outcomes of a co-designed, community-led oral health promotion program for Aboriginal children in rural and remote communities in New South Wales, Australia. Community Dent Health 2020; 37:132-137. [PMID: 32212435 DOI: 10.1922/cdh_00005dimitropoulos06] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Improving the oral health of Aboriginal children is an Australian priority. Public policy recommends the development of evidence-based, culturally competent oral health promotion programs. Positive health outcomes are more likely for Aboriginal people when programs are co-designed with the community and tailored to local needs. This study aims to determine the impact of a community-led oral health promotion program for Aboriginal children in rural and remote communities. BASIC RESEARCH DESIGN Consecutive surveys. Baseline data were collected on the oral health of Aboriginal children aged five-12 years in rural and remote communities in Central Northern New South Wales in 2014. Then, an evidence-based oral health promotion program was co-designed with local Aboriginal communities. It included daily toothbrushing, water bottle program, regular application of fluoride varnish, regular distribution of toothbrushes and fluoride toothpaste and dental health education and commenced in 2016 in three schools in the region. In 2018, oral health status and oral hygiene behaviours of participating children were compared against baseline data to evaluate the program. RESULTS There was a significant reduction in tooth decay, plaque scores and gingivitis. The mean number of teeth affected by tooth decay was 4.13, compared to 5.31 in 2014. An increase was also seen in positive oral hygiene behaviour. CONCLUSIONS The co-design elements of the program are critical to its success. Engaging local Aboriginal communities to co-design and deliver oral health promotion can reduce the burden of tooth decay experienced by Aboriginal children.
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Affiliation(s)
- Y Dimitropoulos
- Poche Centre for Indigenous Health, The University of Sydney
| | - A Holden
- The University of Sydney School of Dentistry
| | - K Gwynne
- Poche Centre for Indigenous Health, The University of Sydney
| | - L Do
- Australian Research Centre for Population Oral Health
| | - R Byun
- Centre for Oral Health Strategy, New South Wales Ministry of Health
| | - W Sohn
- The University of Sydney School of Dentistry
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Deshmukh V, O'Green AL, Bossard C, Seo T, Lamangan L, Ibanez M, Ghias A, Lai C, Do L, Cho S, Cahiwat J, Chiu K, Pedraza M, Anderson S, Harris R, Dellamary L, Kc S, Barroga C, Melchior B, Tam B, Kennedy S, Tambiah J, Hood J, Yazici Y. Modulation of the Wnt pathway through inhibition of CLK2 and DYRK1A by lorecivivint as a novel, potentially disease-modifying approach for knee osteoarthritis treatment. Osteoarthritis Cartilage 2019; 27:1347-1360. [PMID: 31132406 DOI: 10.1016/j.joca.2019.05.006] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/23/2019] [Accepted: 05/14/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Wnt pathway upregulation contributes to knee osteoarthritis (OA) through osteoblast differentiation, increased catabolic enzymes, and inflammation. The small-molecule Wnt pathway inhibitor, lorecivivint (SM04690), which previously demonstrated chondrogenesis and cartilage protection in an animal OA model, was evaluated to elucidate its mechanism of action. DESIGN Biochemical assays measured kinase activity. Western blots measured protein phosphorylation in human mesenchymal stem cells (hMSCs), chondrocytes, and synovial fibroblasts. siRNA knockdown effects in hMSCs and BEAS-2B cells on Wnt pathway, chondrogenic genes, and LPS-induced inflammatory cytokines was measured by qPCR. In vivo anti-inflammation, pain, and function were evaluated following single intra-articular (IA) lorecivivint or vehicle injection in the monosodium iodoacetate (MIA)-induced rat OA model. RESULTS Lorecivivint inhibited intranuclear kinases CDC-like kinase 2 (CLK2) and dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A). Lorecivivint inhibited CLK2-mediated phosphorylation of serine/arginine-rich (SR) splicing factors and DYRK1A-mediated phosphorylation of SIRT1 and FOXO1. siRNA knockdowns identified a role for CLK2 and DYRK1A in Wnt pathway modulation without affecting β-catenin with CLK2 inhibition inducing early chondrogenesis and DYRK1A inhibition enhancing mature chondrocyte function. NF-κB and STAT3 inhibition by lorecivivint reduced inflammation. DYRK1A knockdown was sufficient for anti-inflammatory effects, while combined DYRK1A/CLK2 knockdown enhanced this effect. In the MIA model, lorecivivint inhibited production of inflammatory cytokines and cartilage degradative enzymes, resulting in increased joint cartilage, decreased pain, and improved weight-bearing function. CONCLUSIONS Lorecivivint inhibition of CLK2 and DYRK1A suggested a novel mechanism for Wnt pathway inhibition, enhancing chondrogenesis, chondrocyte function, and anti-inflammation. Lorecivivint shows potential to modify structure and improve symptoms of knee OA.
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Affiliation(s)
| | | | | | - T Seo
- Samumed, LLC, San Diego, CA, USA.
| | | | - M Ibanez
- Samumed, LLC, San Diego, CA, USA.
| | - A Ghias
- Samumed, LLC, San Diego, CA, USA.
| | - C Lai
- Samumed, LLC, San Diego, CA, USA.
| | - L Do
- Samumed, LLC, San Diego, CA, USA.
| | - S Cho
- Samumed, LLC, San Diego, CA, USA.
| | | | - K Chiu
- Samumed, LLC, San Diego, CA, USA.
| | | | | | - R Harris
- Samumed, LLC, San Diego, CA, USA.
| | | | - S Kc
- Samumed, LLC, San Diego, CA, USA.
| | | | | | - B Tam
- Formerly Samumed, LLC, USA.
| | | | | | - J Hood
- Formerly Samumed, LLC, USA.
| | - Y Yazici
- Samumed, LLC, San Diego, CA, USA.
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Baker SR, Foster Page L, Thomson WM, Broomhead T, Bekes K, Benson PE, Aguilar-Diaz F, Do L, Hirsch C, Marshman Z, McGrath C, Mohamed A, Robinson PG, Traebert J, Turton B, Gibson BJ. Structural Determinants and Children's Oral Health: A Cross-National Study. J Dent Res 2018; 97:1129-1136. [PMID: 29608864 DOI: 10.1177/0022034518767401] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Much research on children's oral health has focused on proximal determinants at the expense of distal (upstream) factors. Yet, such upstream factors-the so-called structural determinants of health-play a crucial role. Children's lives, and in turn their health, are shaped by politics, economic forces, and social and public policies. The aim of this study was to examine the relationship between children's clinical (number of decayed, missing, and filled teeth) and self-reported oral health (oral health-related quality of life) and 4 key structural determinants (governance, macroeconomic policy, public policy, and social policy) as outlined in the World Health Organization's Commission for Social Determinants of Health framework. Secondary data analyses were carried out using subnational epidemiological samples of 8- to 15-y-olds in 11 countries ( N = 6,648): Australia (372), New Zealand (three samples; 352, 202, 429), Brunei (423), Cambodia (423), Hong Kong (542), Malaysia (439), Thailand (261, 506), United Kingdom (88, 374), Germany (1498), Mexico (335), and Brazil (404). The results indicated that the type of political regime, amount of governance (e.g., rule of law, accountability), gross domestic product per capita, employment ratio, income inequality, type of welfare regime, human development index, government expenditure on health, and out-of-pocket (private) health expenditure by citizens were all associated with children's oral health. The structural determinants accounted for between 5% and 21% of the variance in children's oral health quality-of-life scores. These findings bring attention to the upstream or structural determinants as an understudied area but one that could reap huge rewards for public health dentistry research and the oral health inequalities policy agenda.
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Affiliation(s)
- S R Baker
- 1 Unit of Dental Public Health, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield, UK
| | - L Foster Page
- 2 Department of Oral Sciences, Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Otago, New Zealand
| | - W M Thomson
- 2 Department of Oral Sciences, Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Otago, New Zealand
| | - T Broomhead
- 1 Unit of Dental Public Health, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield, UK
| | - K Bekes
- 3 Department of Paediatric Dentistry, School of Dentistry, Medical University of Vienna, Vienna, Austria
| | - P E Benson
- 1 Unit of Dental Public Health, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield, UK
| | - F Aguilar-Diaz
- 4 Department of Public Health, National Autonomous University of Mexico León Unit, León, Guanajuato, México
| | - L Do
- 5 Australian Research Centre for Population Oral Health, The University of Adelaide, Adelaide, Australia
| | - C Hirsch
- 6 Department of Paediatric Dentistry, University of Leipzig, Leipzig, Germany
| | - Z Marshman
- 1 Unit of Dental Public Health, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield, UK
| | - C McGrath
- 7 Periodontology & Public Health, Faculty of Dentistry, University of Hong Kong, Hong Kong
| | - A Mohamed
- 8 Department of Dental Services, Ministry of Health, Brunei Darussalam
| | - P G Robinson
- 9 Bristol Dental School, The University of Bristol, Bristol, UK
| | - J Traebert
- 10 Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Santa Catarina, Brazil
| | - B Turton
- 11 Department of Dentistry, University of Puthisastra, Phnom Penh, Cambodia
| | - B J Gibson
- 1 Unit of Dental Public Health, School of Clinical Dentistry, Claremont Crescent, University of Sheffield, Sheffield, UK
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Deshmukh T, Geragthy L, Sivapathan S, Hogg M, Do L, Brown P, Panicker S, Altman M, Gottlieb D, Thomas L. Strain Analysis Identifies Subclinical Left Ventricular Dysfunction in Patients who have had a Bone Marrow Transplant. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.518] [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]
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Deshmukh V, Hu H, Barroga C, Bossard C, Kc S, Dellamary L, Stewart J, Chiu K, Ibanez M, Pedraza M, Seo T, Do L, Cho S, Cahiwat J, Tam B, Tambiah JRS, Hood J, Lane NE, Yazici Y. A small-molecule inhibitor of the Wnt pathway (SM04690) as a potential disease modifying agent for the treatment of osteoarthritis of the knee. Osteoarthritis Cartilage 2018; 26:18-27. [PMID: 28888902 DOI: 10.1016/j.joca.2017.08.015] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 07/18/2017] [Accepted: 08/30/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVES Osteoarthritis (OA) is a degenerative disease characterized by loss of cartilage and increased subchondral bone within synovial joints. Wnt signaling affects the pathogenesis of OA as this pathway modulates both the differentiation of osteoblasts and chondrocytes, and production of catabolic proteases. A novel small-molecule Wnt pathway inhibitor, SM04690, was evaluated in a series of in vitro and in vivo animal studies to determine its effects on chondrogenesis, cartilage protection and synovial-lined joint pathology. DESIGN A high-throughput screen was performed using a cell-based reporter assay for Wnt pathway activity to develop a small molecule designated SM04690. Its properties were evaluated in bone-marrow-derived human mesenchymal stem cells (hMSCs) to assess chondrocyte differentiation and effects on cartilage catabolism by immunocytochemistry and gene expression, and glycosaminoglycan breakdown. In vivo effects of SM04690 on Wnt signaling, cartilage regeneration and protection were measured using biochemical and histopathological techniques in a rodent acute cruciate ligament tear and partial medial meniscectomy (ACLT + pMMx) OA model. RESULTS SM04690 induced hMSC differentiation into mature, functional chondrocytes and decreased cartilage catabolic marker levels compared to vehicle. A single SM04690 intra-articular (IA) injection was efficacious in a rodent OA model, with increased cartilage thickness, evidence for cartilage regeneration, and protection from cartilage catabolism observed, resulting in significantly improved Osteoarthritis Research Society International (OARSI) histology scores and biomarkers, compared to vehicle. CONCLUSIONS SM04690 induced chondrogenesis and appeared to inhibit joint destruction in a rat OA model, and is a candidate for a potential disease modifying therapy for OA.
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Affiliation(s)
| | - H Hu
- Samumed, LLC, San Diego, CA, USA.
| | | | | | - S Kc
- Samumed, LLC, San Diego, CA, USA.
| | | | | | - K Chiu
- Samumed, LLC, San Diego, CA, USA.
| | - M Ibanez
- Samumed, LLC, San Diego, CA, USA.
| | | | - T Seo
- Samumed, LLC, San Diego, CA, USA.
| | - L Do
- Samumed, LLC, San Diego, CA, USA.
| | - S Cho
- Samumed, LLC, San Diego, CA, USA.
| | | | - B Tam
- Samumed, LLC, San Diego, CA, USA.
| | | | - J Hood
- Samumed, LLC, San Diego, CA, USA.
| | - N E Lane
- University of California, Davis, CA, USA.
| | - Y Yazici
- Samumed, LLC, San Diego, CA, USA.
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Dost F, Do L, Farah CS. Knowledge of oral cancer risk factors amongst high-risk Australians: findings from the LESIONS programme. Aust Dent J 2016; 61:432-439. [DOI: 10.1111/adj.12408] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/10/2016] [Indexed: 12/25/2022]
Affiliation(s)
- F Dost
- The University of Queensland Centre for Clinical Research; Herston Queensland Australia
| | - L Do
- Australian Research Centre for Population Oral Health; The University of Adelaide; Adelaide South Australia Australia
| | - CS Farah
- The University of Queensland Centre for Clinical Research; Herston Queensland Australia
- School of Dentistry; The University of Western Australia; Nedlands Western Australia Australia
- Australian Centre for Oral Oncology Research and Education; Nedlands Western Australia Australia
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13
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Leary S, Graham E, Do L. P38 Changes in oral health behaviour between childhood and adolescence: findings from a UK cohort. Br J Soc Med 2016. [DOI: 10.1136/jech-2016-208064.137] [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: 11/04/2022]
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14
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Parry J, Isaacs J, Do L, Riche D, Butler V, Shwayder J. Efficient, effective, and gentle office tubal patency assessment through the parryscope technique. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.538] [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: 10/23/2022]
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Hetts S, Losey A, Lillaney P, Cooke D, Thorne B, Yang J, Sze L, Do L, Martin A, Saeed M, Wilson M. P-004 solid organ embolization in vivousing a magnetically assisted remote controlled catheter under real-time mri guidance. J Neurointerv Surg 2015. [DOI: 10.1136/neurintsurg-2015-011917.43] [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: 11/04/2022]
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Hellman U, Hedqvist D, Do L, Sundström B, Wållberg-Jonsson S. AB0792 Changes in the Metabolism of Hyaluronan Are Associated with Inflammatory Cytokines in Patients with Ankylosing Spondylitis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4412] [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: 11/03/2022]
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Hellman U, Hedqvist D, Sundström B, Do L, Wållberg-Jonsson S. A6.33 Changes in Hyaluronan metabolism is associated with inflammatory cytokines in patients with ankylosing spondylitis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-207259.159] [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: 11/04/2022]
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18
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Hetts SW, Saeed M, Martin AJ, Evans L, Bernhardt AF, Malba V, Settecase F, Do L, Yee EJ, Losey A, Sincic R, Lillaney P, Roy S, Arenson RL, Wilson MW. Endovascular catheter for magnetic navigation under MR imaging guidance: evaluation of safety in vivo at 1.5T. AJNR Am J Neuroradiol 2013; 34:2083-91. [PMID: 23846795 DOI: 10.3174/ajnr.a3530] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Endovascular navigation under MR imaging guidance can be facilitated by a catheter with steerable microcoils on the tip. Not only do microcoils create visible artifacts allowing catheter tracking, but also they create a small magnetic moment permitting remote-controlled catheter tip deflection. A side product of catheter tip electrical currents, however, is the heat that might damage blood vessels. We sought to determine the upper boundary of electrical currents safely usable at 1.5T in a coil-tipped microcatheter system. MATERIALS AND METHODS Alumina tubes with solenoid copper coils were attached to neurovascular microcatheters with heat shrink-wrap. Catheters were tested in carotid arteries of 8 pigs. The catheters were advanced under x-ray fluoroscopy and MR imaging. Currents from 0 mA to 700 mA were applied to test heating and potential vascular damage. Postmortem histologic analysis was the primary endpoint. RESULTS Several heat-mitigation strategies demonstrated negligible vascular damage compared with control arteries. Coil currents ≤300 mA resulted in no damage (0/58 samples) compared with 9 (25%) of 36 samples for > 300-mA activations (P = .0001). Tip coil activation ≤1 minute and a proximal carotid guide catheter saline drip > 2 mL/minute also had a nonsignificantly lower likelihood of vascular damage. For catheter tip coil activations ≤300 mA for ≤1 minute in normal carotid flow, 0 of 43 samples had tissue damage. CONCLUSIONS Activations of copper coils at the tip of microcatheters at low currents in 1.5T MR scanners can be achieved without significant damage to blood vessel walls in a controlled experimental setting. Further optimization of catheter design and procedure protocols is necessary for safe remote control magnetic catheter guidance.
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Affiliation(s)
- S W Hetts
- Departments of Radiology and Biomedical Imaging
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Losey A, Martin A, Lillaney P, Caton C, Patel A, Yee E, Thorne B, Wilson M, Saeed M, Sincic R, Do L, Hetts S. Development of a novel vascular phantom for navigation testing in interventional MRI. J Vasc Interv Radiol 2013. [DOI: 10.1016/j.jvir.2013.01.197] [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: 10/27/2022] Open
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20
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Slade GD, Sanders AE, Do L, Roberts-Thomson K, Spencer AJ. Effects of fluoridated drinking water on dental caries in Australian adults. J Dent Res 2013; 92:376-82. [PMID: 23456704 DOI: 10.1177/0022034513481190] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Systematic reviews produce conflicting conclusions regarding dental caries-preventive effects of water fluoridation in adults. The authors investigated the relationship using data from the nationally representative 2004-2006 Australian National Survey of Adult Oral Health. Effects were compared between the pre-fluoridation cohort born before 1960 (n = 2,270) and the cohort born between 1960 and 1990 (n = 1,509), when widespread implementation of fluoridation increased population coverage from < 1% to 67%. Residential history questionnaires determined the percentage of each person's lifetime exposed to fluoridated water. Examiners recorded decayed, missing, and filled teeth (DMF-Teeth) and decayed and filled tooth surfaces (DF-Surfaces). Socio-demographic and preventive dental behaviors were included in multivariable least-squares regression models adjusted for potential confounding. In fully adjusted models, > 75% of lifetime exposure to fluoridation relative to < 25% of lifetime exposure was associated with 11% and 10% fewer DMF-Teeth in the pre-1960 (p < .0001) and 1960-1990 cohorts (p = .018), respectively. Corresponding reductions in DF-Surfaces were 30% (p < .001) and 21% (p < .001). Findings for intermediate fluoridation exposure suggested a dose-response relationship. Results were consistent in sensitivity analyses accounting for missing data. In this nationally representative sample of Australian adults, caries-preventive effects of water fluoridation were at least as great in adults born before widespread implementation of fluoridation as after widespread implementation of fluoridation.
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Affiliation(s)
- G D Slade
- Department of Dental Ecology, University of North Carolina at Chapel Hill, Room 4501E, UNC School of Dentistry, 385 South Columbia Street, CB#7455, Chapel Hill, NC 27599-7455, USA.
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Yi S, Mak W, Yang C, Liu T, Cui J, Chen A, Purdy J, Monjazeb A, Do L. Development of a Standardized Method for Contouring the Lumbosacral Plexus: A Preliminary Dosimetric Analysis of this Organ at Risk among 15 Patients Treated with IMRT for Lower Gastrointestinal Cancers and the Incidence of Radiation Induced Lumbosacral Plexopathy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1682] [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: 11/24/2022]
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22
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Canter RJ, Wasif N, Tamurian RM, Christensen S, Do L, Martinez SR, Chen S, Brennan MF. Impact of subspecialty, clinical volume, and years of practice in selection of treatment sequencing in the management of localized extremity soft tissue sarcoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10085] [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: 11/20/2022] Open
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Yang J, Liu T, Yang C, Jennelle R, Chen A, Do L, Valicenti R, Purdy J. SU-FF-T-176: Rectal and Bladder Dose in Relationship to PTV Percentage Coverage in Prostate IMRT. Med Phys 2009. [DOI: 10.1118/1.3181651] [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: 11/07/2022] Open
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Saeed M, Weber O, Lee R, Do L, Robert P, Corot C, Saloner D, Higgins C. CMR 2005: 6.04: Blood-pool contrast medium (Vistarem) discriminates acutely infarcted from scarred myocardium on late enhancement. Contrast Media Mol Imaging 2006. [DOI: 10.1002/cmmi.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
STUDY DESIGN We report one case of 66-year-old man with Forestier disease and spinal cord compression by retro-odontoid synovial cyst. OBJECTIVES AND METHODS Although retro-odontoid synovial cysts remain rare, an increasing number have been reported in the literature. Affecting adults in the sixth decade of life, retro-odontoid synovial cysts produce slowly progressive upper spinal cord symptoms. Diagnosis can be achieved by means of magnetic resonance imaging (MRI). Association with Forestier's disease has been reported in only one previous study. Cyst probably develop as a result of enhanced mechanical stress on the only remaining mobile joint. In the literature treatment of retro-odontoid mass associated with Forestier has usually involved occipito-cervical fusion with transoral decompression. RESULTS In this report we describe a patient treated by the posterolateral route with good short- and mid-term clinical and radiological outcome. CONCLUSIONS In comparison of transoral route, the advantages of the posterolatral route are shorter hospitalization and lower morbidity especially in elderly patients with operative risk factors.
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Affiliation(s)
- S Fuentes
- Service de Neurochirurgie, CHU La Timone, rue Saint-Pierre, 13005 Marseille.
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Métellus P, Flores-Parra I, Fuentes S, Dufour H, Adetchessi T, Do L, Bouvier C, Manera L, Grisoli F. [A retrospective study of 32 lumbar synovial cysts. Clinical aspect and surgical management]. Neurochirurgie 2003; 49:73-82. [PMID: 12746722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
We report a retrospective analysis of a series of 32 cases of lumbar synovial cysts. Clinically, two populations were identified: patients who presented radicular pain mimicking the clinical diagnosis of disk herniation (group I) and patients who presented neurogenic claudication consistent with a diagnosis of lumbar spinal stenosis (group II). The radiological work-up consisted in standard X-rays and CT-scan for all patients. MRI (magnetic resonance imaging) was performed in 14 patients. All the patients were operated on. The surgical technique consisted in foraminotomy for patients in group I and more or less extensive laminectomy for patients in group II. Functional outcome was marked by a significant improvement in 96.9% of the patients and those who presented a motor deficit recovered in 83% of the cases. Based on the findings in this series, we discuss the clinical aspects and the therapeutic management of this pathological entity.
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Affiliation(s)
- P Métellus
- Service de Neurochirurgie, Hôpital La Timone, Marseille.
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Fuentes S, Metellus P, Dufour H, Do L, Fesselet J, Grisoli F. [Traumatic spondylolisthesis of the axis: arguments in favor of surgical management after analysis of 8 patients]. Neurochirurgie 2003; 49:25-30. [PMID: 12736577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
BACKGROUND AND PURPOSE The purpose of this report is to assess the efficacy of primary surgical stabilization in the management of traumatic C2 spondylolisthesis. MATERIAL AND METHODS Eight patients including 5 men and 3 women (mean age, 44 years) were treated surgically for traumatic spondylolisthesis of the axis. Three patients presented permanent neurological deficit. The indication for operative treatment included fracture instability and association with either neurological deficit or multiple trauma. External immobilization was attempted and failed in two patients. In all cases the procedure was performed by the anterior route and consisted of surgical fixation with C2/C3 discectomy, intersomatic graft placement, and bone fusion. RESULTS Using the Effendi and Levine classification, fractures were classified as type I in 2 cases, type II in 3, type IIa in 2, and type III in 1. The two patients with severe tetraparesis presented spinal cord contusion at the C2/C3 disk level. Postoperative radiography demonstrated C2/C3 fusion in all patients. No surgical complications were observed. The average hospital stay was 4.5 days. CONCLUSION Surgical stabilization by C2-C3 fusion via the anterior route is effective for management of all types of traumatic C2 spondylolisthesis. It achieves immediate stability. We recommend its use as a primary intervention not only for unstable lesions but also for lesions associated with neurological deficits or multiple trauma. A major benefit is to facilitate nursing care and patient rehabilitation.
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Affiliation(s)
- S Fuentes
- Service de Neurochirurgie, CHU de La Timone, rue Saint-Pierre, 13385 Marseille Cedex 5.
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Fuentes S, Metellus P, Dufour H, Bruder N, Do L, N'Doye N, Grisoli F. [Endoscopic third ventriculostomy for management of obstructive hydrocephalus secondary to supratentorial intraventricular hematoma. Case report]. Neurochirurgie 2002; 48:510-5. [PMID: 12595807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
We report two cases of intraventricular hematoma with obstructive hydrocephalus. We perform endoscopic treatment of the hydrocephalus: aspiration of the hematoma associated with a third ventriculostomy. Both patients respectively aged 59 and 74 years had an obstructive hydrocephalus due to intraventricular hemorrage. The patient neurological status worsen at day 6 for patient No. 1 and at day 4 for patient No. 2. Endoscopic ventriculoscopy was performed respectively at day 6 and at day 5. Operatively, immediate vision was poor but was progressively improved by repetitive irrigation with Ringer-lactate (RL). Obstruction of the right Monro foramen by clot was observed. Introduction of the neuroendoscope into the third ventricle was possible after suction of the hematoma. Perforation of the floor of the third ventricle was performed after identification of the mammillary bodies and the infundibulum. Neurological status recovered within 10 days after surgery and the patients were referred to a medical unit. The patients were independent at home. The one-year MRI follow-up study showed a functional acqueduc in case 1 and a non-functional acqueduc in case 2 indicating in this case that the ventriculocisternotomy was useful. Intraventricular hematoma is not a contraindication for endoscopic third ventriculostomy. If possible, waiting for 6 or 5 days to allow the structuring of the blood clot and using large irrigation RL may facilitate the endoscopic procedure. This indication for endoscopic third ventriculostomy constitutes an alternative to external ventricular drainage which is significatively associated with complication (infection and obstruction). We cannot affirm that the removal of the clots and ventriculocisternostomy versus temporary external drainage avoids secondary hydrocephalus.
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Affiliation(s)
- S Fuentes
- Service de Neurochirurgie, Hôpital de la Timone, Marseille
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Fuentes S, Metellus P, Dufour H, Do L, Grisoli F. [Postoperative intracranial seeding of craniopharyngioma. Three case reports and a review of the literature]. Neurochirurgie 2002; 48:345-50. [PMID: 12407320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Metastasis of craniopharyngioma is uncommon. Only 10 cases have been reported in the literature. In this report, we describe 3 patients who presented metastases following operative treatment of suprasellar craniopharyngioma. All 3 patients (ages: 32, 11, and 9 years) underwent radical excision of a supradiaphragmatic, retrochiasmatic craniopharyngioma by the right frontopterional approach. Resection was considered as total in all cases. All patients required hormone replacement therapy. Local recurrence was observed in only one case. Metastasis occurred along the surgical route in all three patients. The interval between surgery and metastasis was 5 and 3 years in the first two cases. The third patient presented two metastases: one in the temporal space at 3 years and another in the frontal space at 10 years. Repeat surgery was performed in 2 patients. The first case involved a lesion located in the right frontal space, and the second involved local recurrence and metastasis along the surgical route. The third patient was treated by puncture and radiation therapy for the temporal lesion and surveillance for the frontal lesions. No recurrence has been observed at 2 and 7 years after re-operation. Although rare, metastasis of craniopharyngioma has been reported up to 21 years after resection of the primary tumor. Metastasis often occurs along the surgical route, as in our 3 cases, but spreading to distant locations via cerebrospinal fluid has been observed. Regular follow-up is necessary, even after supposedly total resection.
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Affiliation(s)
- S Fuentes
- Service de Neurochirurgie (Pr Grisoli), Hôpital de la Timone, 264, rue Saint-Pierre, 13385 Marseille Cedex 05, France.
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Brunel H, Peretti-Viton P, Benguigui-Charmeau V, Borrione F, Roche P, Do L, Raybaud C. [MRI: an essential examen for the management of sacrococcygeal chondromas]. J Neuroradiol 2002; 29:15-22. [PMID: 11984473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Chordomas are rare tumors, involving mainly the sacrococcygeal area and the clivus. Although a significant radiological semiology exists (osteolytic, lobulated, calcified tumor), the definite diagnosis is histological. Five cases of sacral and/or coccygeal chordomas were studied by CT scan and MRI. Clinical, radiological (tumoral topography and extension) and histological data were noted in all cases. At CT scan, the tumor was median, osteolytic, often calcified, of intermediate density, sparing iliac bones. MRI showed, in all the cases, a tumoral lobulation making easier the diagnosis of chordoma. Futhermore, as compared to CT scan MRI brought new information for the study of the tumoral extension, revealing a frequent involvement of adjacent muscles and spinal canal. It also showed that the tumor most often spared the rectal wall. These data are fundamental in the management of patients: the therapeutical aim must be, if possible, a complete removal of the tumor. Thus, besides its interest in the diagnosis, MRI appears to be essential in the pre-therapeutical assessment of sacro-coccygeal chordomas.
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Affiliation(s)
- H Brunel
- Service de Neuroradiologie, Hôpital La Timone, 264 rue Saint-Pierre, 13385 Marseille Cedex
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Fuentes S, Metellus P, Bouvier C, Dufour H, Do L, Grisoli F. [Metastatic meningioma to the first thoracic vertebral body. A case report and review of the literature]. Neurochirurgie 2002; 48:53-6. [PMID: 11972153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
This report describes a case of metastatic meningioma involving the first thoracic vertebral body in a 63-year-old woman. The patient was treated surgically 10 years earlier for a benign meningioma of the right parietal vault. Local recurrence was diagnosed in 1992. Despite the gamma-knife radiosurgery, recurrence required surgical treatment in 1999. Histological findings were compatible with atypical meningioma (grade II WHO). One year later, the patient presented left C8 cervicobrachial neuralgia. Investigation led to discovery of a D1 tumor that was a metastasis of the atypical intracranial meningioma. A resection of the vertebral T1 body with C7-T2 osteosynthesis was performed with an excellent recovery and no postoperative complication.
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Affiliation(s)
- S Fuentes
- Service de Neurochirurgie, Hospital de la Timone, 264 rue Saint-Pierre, 13385 Marsielle Cedex 5, France.
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Metellus P, Dufour H, Fuentes S, Do L, Figarella-Branger D, Grisoli F. [Central neurocytoma revealed by intraventricular hemorrhage. A case report and review of the literature]. Neurochirurgie 2001; 47:445-7. [PMID: 11493876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
A case of intraventricular tumor presenting with intraventricular hemorrhage in a 38-year-old man is reported. Initial symptoms were an acute onset of headache with projectile vomiting. CT-scan revealed intraventricular hemorrhage. Cerebral angiography did not show any vascular malformation. MRI study, performed initially and several days after, disclosed and confirmed the presence of an intraventricular mass. The patient was operated on via a transfrontal route, and a complete tumor removal was achieved. Pathological examination was consistent with a central neurocytoma. Two similar cases from the literature are discussed with respect to differential diagnosis and practical management considerations.
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Affiliation(s)
- P Metellus
- Service de Neurochirurgie, CHU la Timone, 264, rue Saint-Pierre, 13005 Marseille, France.
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Dufour H, Métellus P, Manera L, Fuentes S, Do L, Grisoli F. Spontaneous vertex extradural hematoma: considerations about causes. Case report and review of the literature. J Neurosurg 2001; 94:633-6. [PMID: 11302666 DOI: 10.3171/jns.2001.94.4.0633] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A 36-year-old woman with an uneventful medical history was admitted to the emergency department following an initial generalized seizure. Neuroimaging workup disclosed a homogeneous mass at the vertex, which first was diagnosed as vertex meningioma. Anticonvulsant drug therapy was administered and the patient was discharged. Two months later the patient was examined in our neurosurgery department for additional therapeutic recommendations. A repeated neuroimaging examination showed considerable regression of the lesion. The findings on magnetic resonance imaging were consistent with those of a regressing extradural hematoma (EDH). A complete blood-coagulation study displayed no evidence of abnormality. Thorough questioning of the patient revealed no history of pericranial infection or head trauma occurring within the last 2 years. The final diagnosis was spontaneously occurring vertex EDH. In this report the authors describe the clinical and neuroimaging features of the case as well as the management strategy, and discuss etiological aspects within the context of a careful review of the literature.
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Affiliation(s)
- H Dufour
- Department of Neurosurgery, University Hospital Center Timone, Marseille, France
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Tseng KY, Roubert C, Do L, Rubinstein M, Kelly MA, Grandy DK, Low MJ, Gershanik OS, Murer MG, Giros B, Raisman-Vozari R. Selective increase of Nurr1 mRNA expression in mesencephalic dopaminergic neurons of D2 dopamine receptor-deficient mice. Brain Res Mol Brain Res 2000; 80:1-6. [PMID: 11039723 DOI: 10.1016/s0169-328x(00)00107-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The orphan nuclear receptor Nurr1 is critical for the survival of mesencephalic dopaminergic precursor neurons. Little is known about the mechanisms that regulate Nurr1 expression in vivo. Other members of this receptor family have been shown to be activated by dopamine. We sought to determine if Nurr1 expression is also regulated by endogenous dopamine through dopamine receptors. Consequently, we investigated the expression of Nurr1 mRNA in genetically modified mice lacking both functional copies of the D2 dopamine receptor gene and in their congenic siblings. Quantitative in situ hybridization demonstrated a significant increased expression of Nurr1 mRNA in the substantia nigra pars compacta and the ventral tegmental area of D2 dopamine receptor -/- mice. No change in Nurr1 expression was detected in other brain regions, such as the habenular nuclei and temporal cortex. Among the cell groups studied, mesencephalic dopaminergic neurons are unique in that they express both Nurr1 and the D2 dopamine receptor, and synthesize dopamine. Thus, it seems plausible that the selective increase in Nurr1 expression observed in D2 receptor-deficient mice is the consequence of an impaired dopamine autoreceptor function.
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Affiliation(s)
- K Y Tseng
- Departamento de Fisiología y Biofísica, Facultad de Medicina, Universidad de Buenos Aires, Argentina
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Kaim JM, Gultz J, Do L, Scherer W. An in vitro investigation of the antimicrobial activity of an herbal mouthrinse. J Clin Dent 1999; 9:46-8. [PMID: 10518853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
The purpose of this study was to determine the antimicrobial activity of one prescription and two commercially available over-the-counter mouthrinses and positive and negative controls against bacteria commonly found in the oral cavity. The bacteria used in this study were Streptococcus mutans, Streptococcus sanguis and Actinomyces viscosus. Sterile discs which were treated with the mouthrinses were placed on agar plates along with the controls. Zones of microbial inhibition were measured in millimeters after 48 hours. The results indicated that all of the mouthrinses demonstrated antimicrobial activity against the bacteria tested. Herbal Mouth and Gum Therapy mouthrinse, containing natural ingredients, produced the largest zones of microbial inhibition when compared to Listerine against all three of the bacteria tested. Herbal Mouth and Gum Therapy mouthrinse produced larger zones of microbial inhibition when compared to Peridex against two of the three bacteria tested, and produced similar zones of inhibition against the third bacteria.
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Affiliation(s)
- J M Kaim
- College of Dentistry, New York University, New York, USA.
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Gultz J, Do L, Boylan R, Kaim J, Scherer W. Antimicrobial activity of cavity disinfectants. Gen Dent 1999; 47:187-90. [PMID: 10687496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The purpose of this study was to determine the antimicrobial activity of four commercially available cavity disinfectants and one prescription mouthwash as they came into contact with bacteria commonly found in the oral cavity. Streptococcus mutans, salivarius, and Actinomyces viscosus were used in the study. Zones of microbial inhibition were measured in millimeters after 48 hours. The results of this study indicate that all of the antimicrobial agents demonstrated activity against the bacteria tested. Consepsis Solution produced the largest zones of inhibition against all three of the bacteria used.
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Affiliation(s)
- J Gultz
- Division of Basic Medical Sciences, New York University College of Dentistry, NY 10010, USA
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Cottart CH, Do L, Blanc MC, Vaubourdolle M, Descamps G, Durand D, Galen FX, Clot JP. Hepatoprotective effect of endogenous nitric oxide during ischemia-reperfusion in the rat. Hepatology 1999; 29:809-13. [PMID: 10051483 DOI: 10.1002/hep.510290317] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The aim of this study was to evaluate the protective or deleterious effects of endogenous nitric oxide (NO) on liver cells during hepatic ischemia-reperfusion (IR) in the rat. Injury to hepatocytes and endothelial cells was evaluated by determining cytolysis-marker activity in plasma (alanine transaminase [ALT]; aspartate transaminase [AST]) and plasma hyaluronic acid (HA) concentration. Clamping the hepatic pedicle for 45 minutes caused a significant increase in plasma AST and ALT activity after 30 minutes of reperfusion, which reached a maximum (+270% and +740%, respectively) after 6 hours of reperfusion. Plasma HA concentration was significantly higher (+130%) only after 6 hours of reperfusion. Administration of a nonselective NO synthase (NOS) inhibitor, Nomega-nitro-L-arginine (L-NNA; 10 mg/kg iv), 30 minutes before IR, caused marked aggravation of postischemic liver injury, as shown by plasma ALT and AST activity and HA concentration. This deleterious effect was partially prevented by the simultaneous injection of L-arginine, the endogenous NO precursor (100 mg/kg iv). Interestingly, L-arginine alone limited postischemic damage (AST, -25%; ALT, -45%; HA, -21% vs. untreated IR rats at 6 hours reperfusion). Pretreatment with the Guanosine 3':5'-cyclic monophosphate-independent vasodilator, prazosin, partially reversed L-NNA effects, but it did not protect untreated IR animals. Pretreatment with aminoguanidine, a selective inhibitor of inducible NOS, did not aggravate hepatic IR injury. Thus, endogenous NO, probably produced by an early and transient activation of a constitutive NOS, protects both hepatocytes and endothelial cells against liver ischemia-reperfusion injury, and this effect is not entirely a result of vasorelaxation.
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Affiliation(s)
- C H Cottart
- Department of Endocrinology, UFR des Sciences Pharmaceutiques et Biologiques, Université René Descartes, Paris, France
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Do T, Parker RG, Do C, Tran L, Do L, Dolkar D. Salvage radiotherapy for biochemical and clinical failures following radical prostatectomy. Cancer J Sci Am 1998; 4:324-30. [PMID: 9815297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
PURPOSE The proportion of prostate cancer patients undergoing radical prostatectomy has increased over the past 10 to 15 years. It is conceivable that a corresponding increase in local tumor recurrences after prostatectomies will be observed. The role of salvage radiotherapy is presently unclear. In this study, the results of salvage radiotherapy for patients with biochemical evidence of local recurrence, as evidenced from rising prostate-specific antigen (PSA) levels, after radical prostatectomy at UCLA Medical Center and the West Los Angeles Veterans Administration Medical Center are described. PATIENTS AND METHODS Between 1990 and 1997, 69 patients were diagnosed with presumed local tumor recurrence after radical prostatectomy. Of these patients, 60 patients were referred to radiotherapy for salvage treatments. Tumor recurrence was detected biochemically, with or without a palpable nodule on digital rectal examination, and a metastatic workup revealing no evidence of extrapelvic disease. Biochemical failure after salvage radiotherapy was defined as two consecutive rises in serum PSA level after a PSA nadir or an absence of a PSA nadir after radiation treatments, as was earlier defined at the ASTRO Consensus Panel on PSA Guidelines. Patients referred for adjuvant postoperative radiation treatment and patients with metastatic disease at presentation were excluded from the study. Patients were treated with a four-field approach (anteroposterior/posteroanterior and opposing laterals) to a median dose of 64.8 Gy in 1.8-Gy fractions. Follow-up evaluations included serum PSA level and digital rectal examination every 3 to 6 months. RESULTS At last follow-up (mean follow-up, 36 months after salvage radiotherapy), 40 of 60 patients (67%) were biochemically free of disease. Thirty of 60 patients (50%) had undetectable PSA levels, and 55 of 60 (92%) had achieved some initial decrease after salvage radiation treatments. Three-year and 5-year actuarial biochemical disease-free survival was 63% and 55%, respectively. Of the 20 patients with biochemical failure after salvage radiation therapy, 10 patients (50%) developed distant metastases, and two (10%) patients were found to have persistent local disease. The mean time to biochemical relapse after salvage radiotherapy was 10 months, and the mean time to distant metastasis after salvage radiotherapy was 20 months. Evaluation of the remaining eight biochemical failures (43%) revealed no evidence of local disease progression or distant metastasis to date. Univariate and multivariate analyses revealed that both PSA > 1.0 ng/mL at the time of salvage radiotherapy and perineural invasion significant prognosticators for biochemical relapse after salvage radiotherapy. Likewise, both univariate and multivariate analyses revealed that prognosticators for distant metastasis included seminal vesicle invasion and perineural invasion. DISCUSSION Salvage radiation therapy is a viable option for post prostatectomy local tumor recurrences. Of the patients who fail biochemically after salvage radiotherapy, 50% were eventually found to have distant metastases. In addition, biopsy-proven local recurrence after-prostatectomy was found not to confer an adverse outcome after salvage radiotherapy.
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Affiliation(s)
- T Do
- Department of Radiation Therapy, University of California, Los Angeles Medical Center 90095, USA
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Abstract
In the current study we examined the regulation of Bak, a death promoter of an apoptotic pathway, in the human breast cancer cell line MCF-7. We observed a time-dependent increase in both Bak mRNA and protein levels which appeared to correlate well with the increase in cell density. We also found that treatment of cells with 17beta-estradiol resulted in inhibition of the time-dependent increases in Bak mRNA and protein. The effects of estradiol appeared to be via estrogen receptor as treatment of cells with progesterone did not effect Bak expression. Our study provides additional molecular evidence for (1) a link between apoptosis pathways and cell-cell and/or cell-cell matrix interactions and (2) a role for estradiol in the modulation of signals between apoptosis pathways and cell-cell and/or cell-cell matrix interactions.
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Affiliation(s)
- L K Leung
- Division of Basic Sciences, National Cancer Institute, NCI-Frederick Cancer Research and Development Center, NIH, MD 21702-1201, USA
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Braunstein GD, Frumovitz M, Do L, Seliktar J, Gonzales E. The beta-core fragment of chorionic gonadotropin is not complexed to macromolecules in amniotic fluid. J Clin Endocrinol Metab 1994; 78:1349-53. [PMID: 7515386 DOI: 10.1210/jcem.78.6.7515386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A prior report claimed that amniotic fluid contains substantial quantities of beta-core fragment, a major degradation product of CG metabolism, complexed to macromolecules. In an attempt to confirm this finding, we measured beta-core fragment concentrations in 36 second- and 22 third-trimester amniotic fluid samples in a direct beta-core fragment RIA as well as a total CG RIA and found that all of the apparent immunoreactivity could be accounted for by the cross-reaction of CG and CG beta in the beta-core fragment RIA. Chromatography of concentrated pools of amniotic fluid or pregnancy serum failed to reveal a peak of CG immunoreactivity in the beta-core fragment elution area. However, chromatography after incubation of amniotic fluid or pregnancy serum with 3 mol/L ammonium thiocyanate resulted in a peak of apparent CG immunoreactivity in the area coinciding with the elution of ammonium thiocyanate and not purified beta-core fragment. The addition of ammonium thiocyanate to the CG RIA tubes resulted in apparent, but spurious, CG immunoreactivity. We conclude that amniotic fluid does not contain appreciable amounts of free or complexed beta-core fragment. We also were unable to confirm the presence of beta-core fragment complexed to macromolecules in pregnancy serum. Our results suggest that the previous studies that purported to demonstrate beta-core fragment-macromolecular complexes in amniotic fluid and pregnancy serum were reporting artifacts introduced by the ammonium thiocyanate used to dissociate beta-core fragment from the putative complex or the in vitro generation of beta-core fragment.
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Affiliation(s)
- G D Braunstein
- Cedars-Sinai Medical Center-University of California Los Angeles School of Medicine 90048
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Raulin F, Frere C, Paillous P, De Vanssay E, Do L, Khlifi M. Titan and exobiological aspects of the Cassini-Huygens mission. J Br Interplanet Soc 1992; 45:257-71. [PMID: 11539470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Titan, the largest satellite of Saturn, has a dense N2-CH4 atmosphere rich in organic compounds, both in gas and in aerosol phases. Its surface is probably covered by oceans of liquid methane-ethane mixtures, with many dissolved organics. This quasi planet appears as a natural laboratory to study chemical evolution toward complex organic systems in a planetary environment over a long time scale. With the Cassini-Huygens mission NASA and ESA will jointly send an orbiter (Cassini) around Saturn and a probe (Huygens) in the atmosphere of Titan. This mission, currently planned to be launched in 1996-1997 for a Saturn - Titan arrival in 2004, offers a unique opportunity to study in detail extra-terrestrial organic processes. Consequently, it has important implications in the field of exobiology and the origins of life.
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Affiliation(s)
- F Raulin
- Equipe Physico-Chimie Organique Spatiale, Universite Paris Val de Marne, France
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Southard JN, Do L, Smith WC, Talamantes F. Hamster placental lactogen-II contains a structural feature unique among the growth hormone-prolactin-placental lactogen family. Mol Endocrinol 1989; 3:1710-3. [PMID: 2608054 DOI: 10.1210/mend-3-11-1710] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Sequence analysis of cDNA for hamster placental lactogen-II (PL-II) revealed that while this protein has a high degree of sequence homology to mouse and rat PL-II it contains a pair of cysteine residues not present in the mouse and rat proteins or in any other known member of the GH-PRL-PL protein family. This unique pair of cysteine residues may be responsible for the extreme tendency of hamster PL-II, compared to other members of the GH-PRL-PL family, to form disulfide-bonded hormone-serum protein complexes.
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Affiliation(s)
- J N Southard
- Department of Biology, University of California, Santa Cruz 95064
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Raulin F, Do L, Frère C, Israel G. GC-MS and ACP experiments on the huygens Titan's probe : Possible exobiological implications of the Cassini mission. ORIGINS LIFE EVOL B 1989. [DOI: 10.1007/bf02388970] [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: 11/28/2022]
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