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Bosetti C, Traini E, Alam T, Allen CA, Carreras G, Compton K, Fitzmaurice C, Force LM, Gallus S, Gorini G, Harvey JD, Kocarnik JM, La Vecchia C, Lugo A, Naghavi M, Pennini A, Piccinelli C, Ronfani L, Xu R, Monasta L. National burden of cancer in Italy, 1990-2017: a systematic analysis for the global burden of disease study 2017. Sci Rep 2020; 10:22099. [PMID: 33328623 PMCID: PMC7744506 DOI: 10.1038/s41598-020-79176-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 11/25/2020] [Indexed: 12/20/2022] Open
Abstract
We monitored the burden of cancer in Italy and its trends over the last three decades, providing estimates of cancer incidence, mortality, years of life lost, years lived with disability, and disability-adjusted life-years (DALYs), for cancer overall and 30 cancer sites using data from the Global Burden of Disease study 2017. An overview of mortality trends between 1990 and 2017 was also provided. In 2017, there were 254,336 new cancer cases in men and 214,994 in women, corresponding to an age-standardized incidence rate (ASIR) of 438 and 330/100,000, respectively. Between 1990 and 2017, incident cancer cases, and, to a lesser extent, ASIRs significantly increased overall and for almost all cancer sites, but ASIRs significantly declined for lung and other tobacco-related neoplasms. In 2017, there were 101,659 cancer deaths in men (age-standardized death rate, ASDR, 158.5/100,000) and 78,918 in women (ASDR 93.9/100,000). Cancer deaths significantly increased between 1990 and 2017 (+ 18%), but ASDR significantly decreased (- 28%). Deaths significantly increased for many cancer sites, but decreased for stomach, esophageal, laryngeal, Hodgkin lymphoma, and testicular cancer. ASDRs significantly decreased for most neoplasms, with the main exceptions of cancer of the pancreas and uterus, and multiple myeloma. In 2017, cancer caused 3,204,000 DALYs. Between 1990 and 2017, DALYs and age-standardized DALY rates significantly declined (-3.4% and -33%, respectively). Age-standardized mortality rates in Italy showed favorable patterns over the last few decades. However, the absolute number of cancer cases and, to a lower extent, of cancer deaths increased likely due to the progressive ageing of the population, this calling for a continuous effort in cancer prevention, early diagnosis, and treatment.
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Affiliation(s)
- Cristina Bosetti
- Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Via Mario Negri, 2, 20156, Milan, Italy.
| | - Eugenio Traini
- Clinical Epidemiology and Public Health Research Unit, Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste, Italy
| | - Tahiya Alam
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - Christine A Allen
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - Giulia Carreras
- Oncologic Network, Prevention, and Research Institute, Florence, Italy
| | - Kelly Compton
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - Christina Fitzmaurice
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Division of Hematology, University of Washington, Seattle, WA, USA
| | - Lisa M Force
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Silvano Gallus
- Department of Environmental Health Sciences, Istituto Di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Giuseppe Gorini
- Oncologic Network, Prevention, and Research Institute, Florence, Italy
| | - James D Harvey
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - Jonathan M Kocarnik
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Carlo La Vecchia
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Alessandra Lugo
- Department of Environmental Health Sciences, Istituto Di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Mohsen Naghavi
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - Alyssa Pennini
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | | | - Luca Ronfani
- Clinical Epidemiology and Public Health Research Unit, Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste, Italy
| | - Rixing Xu
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
| | - Lorenzo Monasta
- Clinical Epidemiology and Public Health Research Unit, Institute for Maternal and Child Health IRCCS Burlo Garofolo, Trieste, Italy
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MD, Anjomshoa M, Anlay DZ, Ansari H, Ansariadi A, Ansha MG, Antonio CAT, Appiah SCY, Aremu O, Areri HA, Ärnlöv J, Arora M, Artaman A, Aryal KK, Asadi-Lari M, Asayesh H, Asfaw ET, Asgedom SW, Assadi R, Ataro Z, Atey TMM, Athari SS, Atique S, Atre SR, Atteraya MS, Attia EF, Ausloos M, Avila-Burgos L, Avokpaho EFGA, Awasthi A, Awuah B, Ayala Quintanilla BP, Ayele HT, Ayele Y, Ayer R, Ayuk TB, Azzopardi PS, Azzopardi-Muscat N, Badali H, Badawi A, Balakrishnan K, Bali AG, Banach M, Banstola A, Barac A, Barboza MA, Barquera S, Barrero LH, Basaleem H, Bassat Q, Basu A, Basu S, Baune BT, Bazargan-Hejazi S, Bedi N, Beghi E, Behzadifar M, Behzadifar M, Béjot Y, Bekele BB, Belachew AB, Belay AG, Belay E, Belay SA, Belay YA, Bell ML, Bello AK, Bennett DA, Bensenor IM, Berhane A, Berman AE, Bernabe E, Bernstein RS, Bertolacci GJ, Beuran M, Beyranvand T, Bhala N, Bhatia E, Bhatt S, Bhattarai S, Bhaumik S, Bhutta ZA, Biadgo B, Bijani A, Bikbov B, Bililign N, Bin Sayeed MS, Birlik SM, Birungi C, 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Kazemeini H, Kazemi Z, Karyani AK, K C P, Kebede S, Keiyoro PN, Kemp GR, Kengne AP, Keren A, Kereselidze M, Khader YS, Khafaie MA, Khajavi A, Khalid N, Khalil IA, Khan EA, Khan G, Khan MS, Khan MA, Khang YH, Khanna T, Khater MM, Khatony A, Khazaie H, Khoja AT, Khosravi A, Khosravi MH, Khubchandani J, Kiadaliri AA, Kibret GDD, Kim CI, Kim D, Kim JY, Kim YE, Kimokoti RW, Kinfu Y, Kinra S, Kisa A, Kissimova-Skarbek K, Kissoon N, Kivimäki M, Kleber ME, Knibbs LD, Knudsen AKS, Kochhar S, Kokubo Y, Kolola T, Kopec JA, Kosek MN, Kosen S, Koul PA, Koyanagi A, Kravchenko MA, Krishan K, Krishnaswami S, Kuate Defo B, Kucuk Bicer B, Kudom AA, Kuipers EJ, Kulikoff XR, Kumar GA, Kumar M, Kumar P, Kumsa FA, Kutz MJ, Lad SD, Lafranconi A, Lal DK, Lalloo R, Lam H, Lami FH, Lan Q, Langan SM, Lansingh VC, Lansky S, Larson HJ, Laryea DO, Lassi ZS, Latifi A, Lavados PM, Laxmaiah A, Lazarus JV, Lebedev G, Lee PH, Leigh J, Leshargie CT, Leta S, Levi M, Li S, Li Y, Li X, Liang J, Liang X, Liben ML, Lim LL, 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Yamada T, Yan LL, Yano Y, Yaseri M, Yasin YJ, Ye P, Yearwood JA, Yentür GK, Yeshaneh A, Yimer EM, Yip P, Yisma E, Yonemoto N, Yoon SJ, York HW, Yotebieng M, Younis MZ, Yousefifard M, Yu C, Zachariah G, Zadnik V, Zafar S, Zaidi Z, Zaman SB, Zamani M, Zare Z, Zeeb H, Zeleke MM, Zenebe ZM, Zerfu TA, Zhang K, Zhang X, Zhou M, Zhu J, Zodpey S, Zucker I, Zuhlke LJJ, Lopez AD, Gakidou E, Murray CJL. Global, regional, and national age-sex-specific mortality and life expectancy, 1950-2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet 2018; 392:1684-1735. [PMID: 30496102 PMCID: PMC6227504 DOI: 10.1016/s0140-6736(18)31891-9] [Citation(s) in RCA: 575] [Impact Index Per Article: 95.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/14/2018] [Accepted: 08/08/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Assessments of age-specific mortality and life expectancy have been done by the UN Population Division, Department of Economics and Social Affairs (UNPOP), the United States Census Bureau, WHO, and as part of previous iterations of the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD). Previous iterations of the GBD used population estimates from UNPOP, which were not derived in a way that was internally consistent with the estimates of the numbers of deaths in the GBD. The present iteration of the GBD, GBD 2017, improves on previous assessments and provides timely estimates of the mortality experience of populations globally. METHODS The GBD uses all available data to produce estimates of mortality rates between 1950 and 2017 for 23 age groups, both sexes, and 918 locations, including 195 countries and territories and subnational locations for 16 countries. Data used include vital registration systems, sample registration systems, household surveys (complete birth histories, summary birth histories, sibling histories), censuses (summary birth histories, household deaths), and Demographic Surveillance Sites. In total, this analysis used 8259 data sources. Estimates of the probability of death between birth and the age of 5 years and between ages 15 and 60 years are generated and then input into a model life table system to produce complete life tables for all locations and years. Fatal discontinuities and mortality due to HIV/AIDS are analysed separately and then incorporated into the estimation. We analyse the relationship between age-specific mortality and development status using the Socio-demographic Index, a composite measure based on fertility under the age of 25 years, education, and income. There are four main methodological improvements in GBD 2017 compared with GBD 2016: 622 additional data sources have been incorporated; new estimates of population, generated by the GBD study, are used; statistical methods used in different components of the analysis have been further standardised and improved; and the analysis has been extended backwards in time by two decades to start in 1950. FINDINGS Globally, 18·7% (95% uncertainty interval 18·4-19·0) of deaths were registered in 1950 and that proportion has been steadily increasing since, with 58·8% (58·2-59·3) of all deaths being registered in 2015. At the global level, between 1950 and 2017, life expectancy increased from 48·1 years (46·5-49·6) to 70·5 years (70·1-70·8) for men and from 52·9 years (51·7-54·0) to 75·6 years (75·3-75·9) for women. Despite this overall progress, there remains substantial variation in life expectancy at birth in 2017, which ranges from 49·1 years (46·5-51·7) for men in the Central African Republic to 87·6 years (86·9-88·1) among women in Singapore. The greatest progress across age groups was for children younger than 5 years; under-5 mortality dropped from 216·0 deaths (196·3-238·1) per 1000 livebirths in 1950 to 38·9 deaths (35·6-42·83) per 1000 livebirths in 2017, with huge reductions across countries. Nevertheless, there were still 5·4 million (5·2-5·6) deaths among children younger than 5 years in the world in 2017. Progress has been less pronounced and more variable for adults, especially for adult males, who had stagnant or increasing mortality rates in several countries. The gap between male and female life expectancy between 1950 and 2017, while relatively stable at the global level, shows distinctive patterns across super-regions and has consistently been the largest in central Europe, eastern Europe, and central Asia, and smallest in south Asia. Performance was also variable across countries and time in observed mortality rates compared with those expected on the basis of development. INTERPRETATION This analysis of age-sex-specific mortality shows that there are remarkably complex patterns in population mortality across countries. The findings of this study highlight global successes, such as the large decline in under-5 mortality, which reflects significant local, national, and global commitment and investment over several decades. However, they also bring attention to mortality patterns that are a cause for concern, particularly among adult men and, to a lesser extent, women, whose mortality rates have stagnated in many countries over the time period of this study, and in some cases are increasing. FUNDING Bill & Melinda Gates Foundation.
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Lozano R, Fullman N, Abate D, Abay SM, Abbafati C, Abbasi N, Abbastabar H, Abd-Allah F, Abdela J, Abdelalim A, Abdel-Rahman O, Abdi A, Abdollahpour I, Abdulkader RS, Abebe ND, Abebe Z, Abejie AN, Abera SF, Abil OZ, Aboyans V, Abraha HN, Abrham AR, Abu-Raddad LJ, Abu-Rmeileh NM, Abyu GY, Accrombessi MMK, Acharya D, Acharya P, Adamu AA, Adebayo OM, Adedeji IA, Adedoyin RA, Adekanmbi V, Adetokunboh OO, Adhena BM, Adhikari TB, Adib MG, Adou AK, Adsuar JC, Afarideh M, Afshari M, Afshin A, Agarwal G, Aghayan SA, Agius D, Agrawal A, Agrawal S, Ahmadi A, Ahmadi M, Ahmadieh H, Ahmed MB, Ahmed S, Akalu TY, Akanda AS, Akbari ME, Akibu M, Akinyemi RO, Akinyemiju T, Akseer N, Alahdab F, Al-Aly Z, Alam K, Alam T, Albujeer A, Alebel A, Alene KA, Al-Eyadhy A, Alhabib S, Ali R, Alijanzadeh M, Alizadeh-Navaei R, Aljunid SM, Alkerwi A, Alla F, Allebeck P, Allen CA, Almasi A, Al-Maskari F, Al-Mekhlafi HM, Alonso J, Al-Raddadi RM, Alsharif U, Altirkawi K, Alvis-Guzman N, Amare AT, Amenu K, Amini E, Ammar W, Anber NH, Anderson JA, Andrei CL, Androudi S, Animut MD, Anjomshoa M, Ansari H, Ansariadi A, Ansha MG, Antonio CAT, Anwari P, Appiah LT, Aremu O, Areri HA, Ärnlöv J, Arora M, Aryal KK, Asayesh H, Asfaw ET, Asgedom SW, Asghar RJ, Assadi R, Ataro Z, Atique S, Atre SR, Atteraya MS, Ausloos M, Avila-Burgos L, Avokpaho EFGA, Awasthi A, Ayala Quintanilla BP, Ayele HT, Ayele Y, Ayer R, Azarpazhooh MR, Azzopardi PS, Azzopardi-Muscat N, Babalola TK, Babazadeh A, Badali H, Badawi A, Balakrishnan K, Bali AG, Banach M, Banerjee A, Banoub JAM, Banstola A, Barac A, Barboza MA, Barker-Collo SL, Bärnighausen TW, Barrero LH, Barthelemy CM, Bassat Q, Basu A, Basu S, Battista RJ, Baune BT, Baynes HW, Bazargan-Hejazi S, Bedi N, Beghi E, Behzadifar M, Behzadifar M, Béjot Y, Bekele BB, Belachew AB, Belay AG, Belay SA, Belay YA, Bell ML, Bello AK, Bennett DA, Bensenor IM, Benzian H, Berhane A, Berhe AK, Berman AE, Bernabe E, Bernstein RS, Bertolacci GJ, Beuran M, Beyranvand T, Bhala N, Bhalla A, Bhansali A, Bhattarai S, Bhaumik S, Bhutta ZA, Biadgo B, Biehl MH, Bijani A, Bikbov B, Bililign N, Bin Sayeed MS, Birlik SM, Birungi C, Bisanzio D, Biswas T, Bitew H, Bizuneh H, Bjertness E, Bobasa EM, Boufous S, Bourne R, Bozorgmehr K, Bragazzi NL, Brainin M, Brant LC, Brauer M, Brazinova A, Breitborde NJK, Briant PS, Britton G, Brugha T, Bukhman G, Busse R, Butt ZA, Cahuana-Hurtado L, Callender CSKH, Campos-Nonato IR, Campuzano Rincon JC, Cano J, Car J, Car M, Cárdenas R, Carrero JJ, Carter A, Carvalho F, Castañeda-Orjuela CA, Castillo Rivas J, Castro F, Causey K, Çavlin A, Cercy KM, Cerin E, Chaiah Y, Chalek J, Chang HY, Chang JC, Chattopadhyay A, Chattu VK, Chaturvedi P, Chiang PPC, Chin KL, Chisumpa VH, Chitheer A, Choi JYJ, Chowdhury R, Christensen H, Christopher DJ, Chung SC, Cicuttini FM, Ciobanu LG, Cirillo M, Claro RM, Claßen TKD, Cohen AJ, Collado-Mateo D, Cooper C, Cooper LT, Cornaby L, Cortinovis M, Costa M, Cousin E, Cromwell EA, Crowe CS, Cunningham M, Daba AK, Dadi AF, Dandona 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Measuring progress from 1990 to 2017 and projecting attainment to 2030 of the health-related Sustainable Development Goals for 195 countries and territories: a systematic analysis for the Global Burden of Disease Study 2017. Lancet 2018; 392:2091-2138. [PMID: 30496107 PMCID: PMC6227911 DOI: 10.1016/s0140-6736(18)32281-5] [Citation(s) in RCA: 264] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/06/2018] [Accepted: 09/12/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Efforts to establish the 2015 baseline and monitor early implementation of the UN Sustainable Development Goals (SDGs) highlight both great potential for and threats to improving health by 2030. To fully deliver on the SDG aim of "leaving no one behind", it is increasingly important to examine the health-related SDGs beyond national-level estimates. As part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2017 (GBD 2017), we measured progress on 41 of 52 health-related SDG indicators and estimated the health-related SDG index for 195 countries and territories for the period 1990-2017, projected indicators to 2030, and analysed global attainment. METHODS We measured progress on 41 health-related SDG indicators from 1990 to 2017, an increase of four indicators since GBD 2016 (new indicators were health worker density, sexual violence by non-intimate partners, population census status, and prevalence of physical and sexual violence [reported separately]). We also improved the measurement of several previously reported indicators. We constructed national-level estimates and, for a subset of health-related SDGs, examined indicator-level differences by sex and Socio-demographic Index (SDI) quintile. We also did subnational assessments of performance for selected countries. To construct the health-related SDG index, we transformed the value for each indicator on a scale of 0-100, with 0 as the 2·5th percentile and 100 as the 97·5th percentile of 1000 draws calculated from 1990 to 2030, and took the geometric mean of the scaled indicators by target. To generate projections through 2030, we used a forecasting framework that drew estimates from the broader GBD study and used weighted averages of indicator-specific and country-specific annualised rates of change from 1990 to 2017 to inform future estimates. We assessed attainment of indicators with defined targets in two ways: first, using mean values projected for 2030, and then using the probability of attainment in 2030 calculated from 1000 draws. We also did a global attainment analysis of the feasibility of attaining SDG targets on the basis of past trends. Using 2015 global averages of indicators with defined SDG targets, we calculated the global annualised rates of change required from 2015 to 2030 to meet these targets, and then identified in what percentiles the required global annualised rates of change fell in the distribution of country-level rates of change from 1990 to 2015. We took the mean of these global percentile values across indicators and applied the past rate of change at this mean global percentile to all health-related SDG indicators, irrespective of target definition, to estimate the equivalent 2030 global average value and percentage change from 2015 to 2030 for each indicator. FINDINGS The global median health-related SDG index in 2017 was 59·4 (IQR 35·4-67·3), ranging from a low of 11·6 (95% uncertainty interval 9·6-14·0) to a high of 84·9 (83·1-86·7). SDG index values in countries assessed at the subnational level varied substantially, particularly in China and India, although scores in Japan and the UK were more homogeneous. Indicators also varied by SDI quintile and sex, with males having worse outcomes than females for non-communicable disease (NCD) mortality, alcohol use, and smoking, among others. Most countries were projected to have a higher health-related SDG index in 2030 than in 2017, while country-level probabilities of attainment by 2030 varied widely by indicator. Under-5 mortality, neonatal mortality, maternal mortality ratio, and malaria indicators had the most countries with at least 95% probability of target attainment. Other indicators, including NCD mortality and suicide mortality, had no countries projected to meet corresponding SDG targets on the basis of projected mean values for 2030 but showed some probability of attainment by 2030. For some indicators, including child malnutrition, several infectious diseases, and most violence measures, the annualised rates of change required to meet SDG targets far exceeded the pace of progress achieved by any country in the recent past. We found that applying the mean global annualised rate of change to indicators without defined targets would equate to about 19% and 22% reductions in global smoking and alcohol consumption, respectively; a 47% decline in adolescent birth rates; and a more than 85% increase in health worker density per 1000 population by 2030. INTERPRETATION The GBD study offers a unique, robust platform for monitoring the health-related SDGs across demographic and geographic dimensions. Our findings underscore the importance of increased collection and analysis of disaggregated data and highlight where more deliberate design or targeting of interventions could accelerate progress in attaining the SDGs. Current projections show that many health-related SDG indicators, NCDs, NCD-related risks, and violence-related indicators will require a concerted shift away from what might have driven past gains-curative interventions in the case of NCDs-towards multisectoral, prevention-oriented policy action and investments to achieve SDG aims. Notably, several targets, if they are to be met by 2030, demand a pace of progress that no country has achieved in the recent past. The future is fundamentally uncertain, and no model can fully predict what breakthroughs or events might alter the course of the SDGs. What is clear is that our actions-or inaction-today will ultimately dictate how close the world, collectively, can get to leaving no one behind by 2030. FUNDING Bill & Melinda Gates Foundation.
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Abstract
In chloroplasts and mitochondria isolated from pea leaves, (35)S-methionine incorporation reveals that different subsets of proteins are selected for synthesis in the presence of the external redox reagents ferricyanide, ascorbate, duroquinol, dithiothreitol and dithionite, and in the presence of different electron transport inhibitors in the light (in chloroplasts) or with respiratory substrates (in mitochondria). Redox state of specific electron carriers may therefore regulate expression of specific genes in chloroplasts and mitochondria. The results are consistent with the hypothesis that chloroplast and mitochondrial genomes encode proteins whose synthesis must be regulated by electron transport in photosynthesis and respiration.
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Affiliation(s)
- C A Allen
- a Department of Plant Cell Biology , Lund University , Lund , Sweden
| | - G Håkansson
- a Department of Plant Cell Biology , Lund University , Lund , Sweden
| | - J F Allen
- a Department of Plant Cell Biology , Lund University , Lund , Sweden
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Allen CA, Hart BL, Taylor CL, Clericuzio CL. Bilateral cavernous internal carotid aneurysms in a child with juvenile paget disease and osteoprotegerin deficiency. AJNR Am J Neuroradiol 2007; 29:7-8. [PMID: 17947367 DOI: 10.3174/ajnr.a0755] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Benford DJ, Staguhn JG, Stacey GJ, Page L, Moseley, Jr. SH, Irwin KD, Chervenak JA, Allen CA. Design and fabrication of two-dimensional superconducting bolometer arrays. ACTA ACUST UNITED AC 2004. [DOI: 10.1117/12.552108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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7
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Abstract
Brunner's gland hamartomas are rare tumours of the duodenum. These lesions have previously been described as being benign, with no malignant potential. A case report is presented of a Brunner's gland hamartoma, whose histology revealed a focus of well marked epithelial dysplasia. This case suggests a dysplastic stage in the natural history of Brunner's gland hamartoma, and questions the malignant potential of these lesions.
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Affiliation(s)
- M J Brookes
- Department of Gastroenterology, City General Hospital, Stoke-on-Trent.
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8
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Allen CA, Fedorka-Cray PJ, Vazquez-Torres A, Suyemoto M, Altier C, Ryder LR, Fang FC, Libby SJ. In vitro and in vivo assessment of Salmonella enterica serovar Typhimurium DT104 virulence. Infect Immun 2001; 69:4673-7. [PMID: 11402014 PMCID: PMC98547 DOI: 10.1128/iai.69.7.4673-4677.2001] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [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: 11/20/2022] Open
Abstract
Multidrug-resistant Salmonella enterica serovar Typhimurium phage type DT104 has become a widespread cause of human and other animal infection worldwide. The severity of clinical illness in S. enterica serovar Typhimurium DT104 outbreaks has led to the suggestion that this strain possesses enhanced virulence. In the present study, in vitro and in vivo virulence-associated phenotypes of several clinical isolates of S. enterica serovar Typhimurium DT104 were examined and compared to S. enterica serovar Typhimurium ATCC 14028s. The ability of these DT104 isolates to survive within murine peritoneal macrophages, invade cultured epithelial cells, resist antimicrobial actions of reactive oxygen and nitrogen compounds, and cause lethal infection in mice were assessed. Our results failed to demonstrate that S. enterica serovar Typhimurium DT104 isolates are more virulent than S. enterica serovar Typhimurium ATCC 14028s.
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Affiliation(s)
- C A Allen
- Department of Microbiology, North Carolina State University, Raleigh, North Carolina 27695
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9
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Robertson GT, Kovach ME, Allen CA, Ficht TA, Roop RM. The Brucella abortus Lon functions as a generalized stress response protease and is required for wild-type virulence in BALB/c mice. Mol Microbiol 2000; 35:577-88. [PMID: 10672180 DOI: 10.1046/j.1365-2958.2000.01726.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [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: 11/20/2022]
Abstract
The gene encoding a Lon protease homologue has been cloned from Brucella abortus. The putative Brucella abortus Lon shares > 60% amino acid identity with its Escherichia coli counterpart and the recombinant form of this protein restores the capacity of an Escherichia coli lon mutant to resist killing by ultraviolet irradiation and regulate the expression of a cpsB:lacZ fusion to wild-type levels. A sigma32 type promoter was identified upstream of the predicted lon coding region and Northern analysis revealed that transcription of the native Brucella abortus lon increases in response to heat shock and other environmental stresses. ATP-dependent proteolytic activity was also demonstrated for purified recombinant Lon. To evaluate the capacity of the Brucella abortus Lon homologue to function as a stress response protease, the majority of the lon coding region was removed from virulent strain Brucella abortus 2308 via allelic exchange. In contrast to the parent strain, the Brucella abortus lon mutant, designated GR106, was impaired in its capacity to form isolated colonies on solid medium at 41 degrees C and displayed an increased sensitivity to killing by puromycin and H2O2. GR106 also displayed reduced survival in cultured murine macrophages and significant attenuation in BALB/c mice at 1 week post infection compared with the virulent parental strain. Beginning at 2 weeks and continuing for 6 weeks post infection, however, GR106 and 2308 displayed equivalent spleen and liver colonization levels in mice. These findings suggest that the Brucella abortus Lon homologue functions as a stress response protease that is required for wild-type virulence during the initial stages of infection in the mouse model, but is not essential for the establishment and maintenance of chronic infection in this host.
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Affiliation(s)
- G T Robertson
- Department of Microbiology and Immunology, Louisiana State University Health Sciences Center, Shreveport, LA 71130-3932, USA
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10
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Abstract
Cloned sheep have recently been discovered to have an unexpectedly advanced biological age. We propose that the explanation is a simple consequence of inheritance of acquired, free radical-induced cellular damage with somatic mitochondria that contribute to the mitochondrial population of cloned cells but not to zygotes produced by fertilization in normal sexual reproduction. Each increment of ageing in cloning experiments is therefore predicted to be maternally inherited. The hypothesis suggests practical ways of decreasing the effect. The hypothesis is itself a prediction of the recent proposal that mitochondria of the female germ line function primarily as genetic templates.
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11
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Allen CA, Adams LG, Ficht TA. Transposon-derived Brucella abortus rough mutants are attenuated and exhibit reduced intracellular survival. Infect Immun 1998; 66:1008-16. [PMID: 9488389 PMCID: PMC108009 DOI: 10.1128/iai.66.3.1008-1016.1998] [Citation(s) in RCA: 140] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/1997] [Accepted: 12/19/1997] [Indexed: 02/06/2023] Open
Abstract
The O antigen of Brucella abortus has been described as a major virulence determinant based on the attenuated survival of fortuitously isolated rough variants. However, the lack of genetic definition of these mutants and the virulence of naturally occurring rough species, Brucella ovis and Brucella canis, has confused interpretation. To better characterize the role of O antigen in virulence and survival, transposon mutagenesis was used to generate B. abortus rough mutants defective in O-antigen presentation. Sequence analysis of DNA flanking the site of Tn5 insertion was used to verify insertion in genes encoding lipopolysaccharide (LPS) biosynthetic functions. Not surprisingly, each of the rough mutants was attenuated for survival in mice, but unexpected differences among the mutants were observed. In an effort to define the basis for the observed differences, the structure of the rough LPS and the sensitivity of these mutants to individual killing mechanisms were examined in vitro. All of the B. abortus rough mutants exhibited a 4- to 5-log-unit increase, compared to the smooth parental strain, in sensitivity to complement-mediated lysis. Little change was evident in the sensitivity of these organisms to hydrogen peroxide, consistent with an inability of O antigen to exclude relatively small molecules. Sensitivity to polymyxin B, which was employed as a model cationic, amphipathic peptide similar to defensins found in phagocytic cells, revealed survival differences among the rough mutants similar to those observed in the mouse. One mutant in particular exhibited hypersensitivity to polymyxin B and reduced survival in mice. This mutant was characterized by a truncated rough LPS. DNA sequence analysis of this mutant revealed a transposon interruption in the gene encoding phosphomannomutase (pmm), suggesting that this activity may be required for the synthesis of a full-length core polysaccharide in addition to O antigen. B. abortus O antigen appears to be essential for extra- and intracellular survival in mice.
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Affiliation(s)
- C A Allen
- Department of Veterinary Pathobiology, Texas A&M University, College Station 77843-4467, USA
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12
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Abstract
Mammalian sperm undergo discharge of a single, anterior secretory granule following their attachment to the zona pellucida surrounding the oocyte. This secretory discharge is known for historical reasons as the acrosome reaction. It fulfils a number of purposes and without it, sperm are unable to penetrate the zona pellucida and fuse with the oocyte. In this review, we focus on the role of the acrosome reaction in the development of fusion competence in sperm. Any naturally occurring membrane fusion has two major sequential steps: a docking or adhesion step, in which two membranes adhere, and a fusion step, in which their lipid bilayers are destabilized and merged and a cellular compartment is either created or destroyed. Recent evidence suggests that there is an important role for oocyte integrins and sperm-bound disintegrins in mammalian sperm/oocyte adhesion and fusion. The fusion mechanism employed by sperm remains poorly understood, however, and circumstantial evidence suggests it is more complex than the interaction between a single protein species and its target. Sperm/oocyte fusion is probably the most accessible eukaryotic model for intercellular fusion currently available, partly because it is temporally separated from gene expression. Elucidation of the mechanism of sperm/oocyte fusion may throw light on the mechanism of other intercellular fusions such as myoblast fusion, and the evolutionary relationship of intercellular membrane fusion to intracellular membrane fusion.
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Affiliation(s)
- C A Allen
- Department of Anatomy and Structural Biology, University of Otago, Medical School, Dunedin, New Zealand
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13
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Affiliation(s)
- T S Onon
- St Mary's Hospital, Whitworth Park, Manchester, UK
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14
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Allen CA. Wellness is key for diabetics. Don't let sick days get you down. N C Med J 1997; 58:39-42. [PMID: 9019112] [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: 02/03/2023]
Affiliation(s)
- C A Allen
- Diabetes Care Workgroup, Project DIRECT (Diabetes Intervention Reaching and Educating Communities Together, USA
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15
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Hsia PW, Suresh G, Allen CA, Harrington G, Maskal S, Fain E, Damiano RJ. Improved nonthoracotomy defibrillation based on ventricular fibrillation waveform characteristics. Pacing Clin Electrophysiol 1996; 19:1537-47. [PMID: 8946448 DOI: 10.1111/j.1540-8159.1996.tb03178.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 02/03/2023]
Abstract
The heart has been shown to be more susceptible to defibrillation at a higher absolute ventricular fibrillation voltage (AVFV) measured on the surface ECG. This study evaluated in a closed-chest canine model (n = 7) the clinical applicability of using a real-time VF waveform analysis system using an electrogram defined between the generator can and an RV endocardial electrode. Under fluoroscopic guidance, superior vena cava and RV spring coil catheter electrodes were inserted through the external jugular vein. A subcutaneous patch was placed on the left chest. A two-parameter tracking algorithm was used to dynamically identify the high AVFV area, and a biphasic shock was triggered synchronously at the next peak. The performance of this new peak shock method (PSM) was compared to the conventional method of shocking at a fixed time in 175 paired trials. Five shocks per voltage and five voltages per animal were randomized between the two methods to permit the generation of sigmoidal dose response curves for the estimation of 50% (E50), 75% (E75), and 100% (E100) success energies. Induction of VF and discharge voltage were kept constant while energy delivered, impedance (R), and AVFV at the point of shock were measured. Energy (8.63 +/- 0.40 vs 8.64 +/- 0.40 J), R (48.60 +/- 0.30 vs 48.59 +/- 0.30 omega), and current (7.50 +/- 0.18 vs 7.51 +/- 0.16 A) were not significantly different between trials for either the conventional or the PSM. The time from the onset of VF until the defibrillation shock was 7.98 +/- 1.44 seconds. Higher overall successes (46.3% vs 33.1%; P < 0.01) and lower E50, E75, and E100 were observed for the PSM. Finally, the significantly higher AVFV (9.12 +/- 0.32 vs 4.73 +/- 0.34 mV; P < 0.0001) with the peak method suggests that the high VF voltage could be detected as it occurred in real-time. The improved defibrillation success supports the use of this method for nonthoracotomy defibrillation.
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Affiliation(s)
- P W Hsia
- Department of Biomedical Engineering, Medical College of Virginia, Virginia Commonwealth University, Richmond, USA
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16
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Hsia PW, Frerk S, Allen CA, Wise RM, Cohen NM, Damiano RJ. A critical period of ventricular fibrillation more susceptible to defibrillation: real-time waveform analysis using a single ECG lead. Pacing Clin Electrophysiol 1996; 19:418-30. [PMID: 8848389 DOI: 10.1111/j.1540-8159.1996.tb06512.x] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Previous studies have suggested that variations in the underlying ventricular fibrillation (VF) waveform may be one of the factors responsible for the probabilistic nature of defibrillation. The heart appeared to be more susceptible to defibrillation at higher absolute VF voltages (AVFV). This study investigated in an open-chest canine model (n = 8), a newly developed system that analyzed the VF waveform in real-time, instantaneously determined the time to shock, and immediately delivered a fixed low energy DC shock. A two parameter tracking technique using a running long-term and short-term AVFV average was devised to automatically identify a high voltage peak area of the VF waveform, which has been hypothesized to represent a critical period susceptible to defibrillation. Using a DC shock estimated at the 50% success level, the performance using this technique in 58 defibrillation trials was compared to the performance of the conventional method of shocking at a fixed time (random shock method) in 62 trials. Patch size, electrode location, and discharge voltage were kept constant while VF duration, transmyocardial resistance (TMR), energy delivered, and AVFV at the point of shock were measured. Shock energy and current, TMR, and VF duration were similar with both shock methods. A significantly higher AVFV was observed for trials performed with the peak shock method (0.66 +/- 0.02 mV) as compared to trials performed with the random shock method (0.25 +/- 0.09 mV) (P < 0.003). Using lead II as the only sensing lead, the success rate was increased in 6 of 8 dogs (75%) with the new method. One animal showed identical performance, and one animal a worse performance. The overall increase in success rate was 24% using a single ECG lead (range 0%-100%; P < 0.04). Our data document that using this algorithm a period of high VF voltage can be detected in real-time. The improved success in the majority of animals supports the hypothesis that a critical period susceptible to defibrillation exists during VF. However, the high AVFV detected using a single ECG lead did not translate to an improved success rate in all animals. This suggests that other factors in addition to the VF voltage measured on a single lead of the ECG are important in characterizing this critical period.
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Affiliation(s)
- P W Hsia
- Department of Biomedical Engineering, Medical College of Virginia, Virginia Commonwealth University, Richmond, USA
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17
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Allen CA, Green DP. Monoclonal antibodies which recognize equatorial segment epitopes presented de novo following the A23187-induced acrosome reaction of guinea pig sperm. J Cell Sci 1995; 108 ( Pt 2):767-77. [PMID: 7539438 DOI: 10.1242/jcs.108.2.767] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Acrosome-intact mammalian sperm can adhere to zona pellucida-free oocytes but are only capable of fusing if they have previously undergone the acrosome reaction. This suggests that the acrosome reaction results in presentation of at least one novel epitope which plays a role in sperm-oocyte fusion. Monoclonal antibodies were raised against unfixed acrosome-reacted guinea pig sperm and screened by indirect immunofluorescence for binding to the equatorial segment. They were back-screened against unfixed acrosome-intact sperm for absence of binding. Using this approach, two antibodies, G11 and M13, were identified which detect equatorial segment epitopes presented de novo by sperm following an A23187-induced acrosome reaction. The localization of these epitopes to the equatorial segment was confirmed at the ultrastructural level by indirect immunogold-labelling. Fluorescein isothiocyanate-labelled Fab fragments of these two antibodies also localized to the equatorial segment. Affinity chromatography and western blotting established that the two mAbs recognize the same proteins, which have M(r)s of 34, 46, 48 and 51 × 10(3). When sperm were induced to undergo the acrosome reaction with A23187 and incubated with their discharged acrosomal contents, a further band was produced with an M(r) of 30 × 10(3). Production of this band was inhibited in the combined presence of 100 microM phenylmethylsulphonyl fluoride and 100 microM p-aminobenzamidine even though these compounds do not inhibit acrosomal exocytosis. Neuraminidase and O-glycosidase were without effect on the proteins detected by antibodies G11 and M13. Endoglycosidase F, however, eliminated the bands of M(r) 46, 48 and 51 × 10(3) and replaced them with a strong band of M(r) 44 × 10(3) and two minor bands of M(r) 43 and 45 × 10(3). Formaldehyde fixation of acrosome-intact sperm caused partial rupture of the acrosome with loss of the characteristic rouleaux (stacks) of guinea pig sperm. Indirect labelling of these formaldehyde-fixed sperm with fluorescein isothiocyanate- or gold-labelled second antibody, with or without permeabilization with 0.05% Triton X-100, showed dense labelling on the cytoplasmic face of the plasma membrane overlying the convex surface of the acrosome but little labelling elsewhere. Cryosections of acrosome-intact sperm labelled indirectly with immuno-gold showed labelling consistent with the same location, as well as sporadic labelling at other intracellular sites overlying the acrosome. Since there is no evidence that sperm can translocate intact membrane protein from the cytoplasmic face to the extracellular face of the plasma membrane during the acrosome reaction, the evidence suggests that there are two isolated antigen pools.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- C A Allen
- Department of Pharmacology, University of Otago Medical School, Dunedin, New Zealand
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Vijeyasingam R, Darnton SJ, Jenner K, Allen CA, Billingham C, Matthews HR. Expression of p53 protein in oesophageal carcinoma: clinicopathological correlation and prognostic significance. Br J Surg 1994; 81:1623-6. [PMID: 7827889 DOI: 10.1002/bjs.1800811120] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Correlation of p53 expression with 5-year survival and histopathological parameters was examined immunohistochemically in two groups of 30 patients with oesophageal carcinoma (5-year survivors versus non-survivors). Tumour type, sex, operative procedure and age were matched. Some 64 per cent of squamous carcinomas and 79 per cent of adenocarcinomas were p53 positive. Normal squamous, normal glandular and metaplastic glandular epithelia were negative. Dysplastic squamous and glandular epithelium adjacent to tumours was positive when the tumour was positive and negative when it was not. Univariate analysis showed that nodal status (P = 0.001), and grade and depth of invasion (both P = 0.01) correlated with outcome. Correlation of tumour grade with outcome, when the most poorly differentiated area is used, is a novel finding for oesophageal carcinoma. The p53 status was not significantly associated with survival or any of these parameters.
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Affiliation(s)
- R Vijeyasingam
- Oesophageal Research Laboratory, East Birmingham Hospital, UK
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Affiliation(s)
- C A Allen
- Department of Histopathology, Central Pathology Laboratory, Stoke-on-Trent, UK
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Abstract
Myocardial protection strategies use cardioplegic solutions to reduce the injury induced by surgical ischemia and reperfusion. However, there is a high incidence of electrophysiologic abnormalities after cardioplegic arrest. A computerized epicardial mapping system in a porcine cardiopulmonary bypass model was used to measure the electrophysiologic consequences of different myocardial protection techniques. Both warm and cold, crystalloid and blood cardioplegic solutions were compared. The effects of hypothermia and prolonged cardiopulmonary bypass were examined in a control group that underwent a 2-hour period of hypothermia without cardioplegia or aortic cross-clamping, followed by 2 hours of normothermic reperfusion. Isochronous activation maps, unipolar electrograms, ventricular refractory periods, and pacing thresholds were measured before cardioplegic arrest and during reperfusion. Compared with the control group, crystalloid cardioplegia, but not blood cardioplegia, was accompanied by large changes in the pattern of ventricular activation and by persistent (> 2 hours) and significant slowing of the time required for complete ventricular activation. This was not the result of hypoxia. Moreover, the effective refractory period and the pacing threshold were unchanged by any cardioplegia. Our data suggest that crystalloid cardioplegia increases myocardial resistance to current flow leading to a derangement of electrical impulse propagation that may underlie arrhythmogenesis.
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Affiliation(s)
- N M Cohen
- Department of Surgery, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0068
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Sanders DS, Evans AT, Allen CA, Bryant FJ, Johnson GD, Hopkins J, Stocks SC, Marsden JR, Kerr MA. Classification of CEA-related positivity in primary and metastatic malignant melanoma. J Pathol 1994; 172:343-8. [PMID: 8207615 DOI: 10.1002/path.1711720409] [Citation(s) in RCA: 18] [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: 01/29/2023]
Abstract
Using a panel of antibodies to carcinoembryonic antigen (CEA), in paraffin-processed biopsy material patchy, predominantly membranous positivity was seen on tumour cells in 70 per cent of cases of superficial spreading melanoma, 60 per cent of nodular melanomas, and 75 per cent of secondary deposits studied with unabsorbed polyclonal anti-CEA only. No staining was seen using monoclonal anti-CEAs. Localization of CEA to the cell membrane was confirmed with confocal microscopy. Immunoblotting of fresh frozen material detected CEA of around 180 kD in both primary and metastatic melanomas migrating with an apparent molecular weight of between 150 and 200 kD, indicating variable glycosylation of the protein. Recognition of an adhesive role for CEA with roles in immunolocalization and immunotherapy emphasizes the importance of more precise classification of CEA-related positivity in human tumours.
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Affiliation(s)
- D S Sanders
- Department of Pathology, Medical School, Edgbaston, Birmingham, U.K
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22
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Abstract
Bacterial products fmet-leu-phe (FMLP), muramyl dipeptide (MDP) and lipopolysaccharide (LPS) were assayed for their ability to alter the inflammatory response to lambda carrageenan-induced pleurisy in Hooded Surgery rats. Continuously infused FMLP, or one initial i.v. dose of FMLP, MDP or LPS either ablated or partially suppressed the pleurisy. Total circulating leucocytes and neutrophils were suppressed by 55-65% when compared to the normal circulating leucocyte response to carrageenan pleurisy, excepting the protocol incorporating a single i.v. dose of FMLP where suppression was intermediate at 30%. There were also significant changes in the expression of FMLP receptors on circulating neutrophils. MDP and LPS induced a receptor number increase of 2 and 1.7 times initial value respectively, whilst a continuous FMLP infusion caused a receptor decrease to 0.3 times the initial value. The introduction of bacterial products at an alternative site to that of the pleurisy had an anti-inflammatory effect and the pleurisy was reduced.
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Affiliation(s)
- C A Allen
- Department of Experimental Medicine, University of Otago Medical School, Dunedin, New Zealand
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Abstract
In order to examine the effects of ventricular distention on the unipolar electrogram (UEG), an isolated rabbit heart modified Langendorff preparation was utilized. Left ventricular (LV) volume was adjusted using ionically permeable (PB = 9 hearts) or ionically impermeable balloons (IB = 4 hearts). LV UEGs, LV end-diastolic pressure (EDP), and LV minor axis dimension (MAD), as measured by ultrasonic transducers, were recorded. Three hundred twenty-five electrograms were digitized and analyzed with custom-designed software. In the PB group, a significant inverse linear relationship was found between UEG amplitude and changes in MAD (P < 0.0001). For each animal, this relationship had an R value > 0.8 and a P value < 0.0001. There was also a significant inverse linear relationship between UEG slope and changes in MAD (P < 0.01). UEG amplitude and slope also exhibited a significant inverse relationship to changes in LV EDP, which were best described by a third order polynomial function. In the IB group, no significant relationship was found between either UEG amplitude or slope and MAD or EDP. In this study, intracavitary volume exerted a profound and significant influence on UEG amplitude and slope. This effect was due to increases in conductive intraventricular volume and not to myocardial stretch.
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Affiliation(s)
- M K Belz
- Divisions of Cardiology, Virginia Commonwealth University/Medical College of Virginia, Richmond
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Abstract
While the development of pharmacological cardioplegic solutions for myocardial protection during cardiopulmonary bypass (CPB) have significantly lengthened the safe operating time for cardiac surgical procedures, the introduction of hypothermic hyperkalemic cardioplegia (CPG) has markedly increased the incidence of postoperative arrhythmias and conduction abnormalities. Using a customized modification of a computerized mapping system, we have developed a large animal porcine model of CPB that is exquisitely sensitive to the electrophysiological (EP) derangements imposed by ischemia and cardiac arrest. This model is able to measure spatial and temporal parameters of ventricular activation with high resolution, using an array of up to 84 epicardial electrodes that can be reproducibly placed on the surface of the heart utilizing known epicardial anatomical markers (e.g., coronary arteries). With this system we have measured the spectrum of clinically observed EP disturbances caused by CPG, from slowed intraventricular conduction to complete heart block. Compared to the control group of hypothermia alone, 2 hours of crystalloid CPG arrest had a significant slowing effect on ventricular activation (p < 0.05). CPG was accompanied, in each animal, by profound changes in the spatial distribution of ventricular activation and persistent slowing of ventricular activation. Traditional EP parameters of effective refractory period and pacing threshold were unchanged by CPG. Smaller temporal and spatial changes were observed in the control group, but were always reversed by 90 minutes of warm reperfusion. We conclude that CPG induces injury of the specialized conducting system and, to a lesser degree, the myocardium. This model will afford us the opportunity to test new methods of CPG to further improve myocardial preservation during CPB.
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Affiliation(s)
- N M Cohen
- Department of Surgery, Medical College of Virginia, Virginia Commonwealth University, Richmond
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25
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Wood AJ, Connock MJ, Allen CA, Grace RH. AgNOR technique in relation to colorectal neoplasia. J Clin Pathol 1992; 45:743. [PMID: 1401197 PMCID: PMC495166 DOI: 10.1136/jcp.45.8.743-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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26
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Abstract
The number of cell surface FMLP receptors expressed by peripheral blood neutrophils taken from healthy individuals was quantitated using a direct fluorescence label analysed on the FACScan. Receptor numbers, assayed on cells from heparinised blood prepared at 4 degrees C or 37 degrees C or in the presence of LPS (30 ng/ml) were 12,540 +/- SD 2413, 18,588 +/- 4938 and 45,041 +/- 10,744 respectively. Anticoagulation with EGTA resulted in 25-30% greater basal receptor numbers but had no effect on receptor level after maximal stimulation with LPS. Double labelling with a neutrophil-specific mAb showed that the entire neutrophil population expressed FMLP receptors.
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Affiliation(s)
- C A Allen
- Department of Experimental Medicine, University of Otago Medical School, Dunedin, New Zealand
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27
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O'Brien ME, Souberbielle BE, Cowan ME, Allen CA, Luesley DM, Mould JJ, Blackledge GR, Skinner GR. Glycoprotein patterns in normal and malignant cervical tissue. Cancer Lett 1991; 58:247-54. [PMID: 1855199 DOI: 10.1016/0304-3835(91)90108-t] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 12/29/2022]
Abstract
Glycoproteins from normal and malignant human cervix were studied using an organ culture system and compared by gel electrophoresis and autoradiography. Five glycoproteins of 178 kDa, 95 kDa, 93 kDa, 82 kDa and 38 kDa and 1 glycolipid (46 kDa) were detected more frequently in squamous carcinomas. Certain glycoproteins were shown to be oncofoetal and some had affinity for Concanavalin A (Con A). The 82 kDa glycoprotein was present in 16/17 squamous carcinomas but in only 1/13 normal cervices. This band represented a glycoprotein containing glucosamine, mannose, small quantities of methionine and no fucose. These preliminary results suggest that these glycoproteins and in particular the 82-kDa glycoprotein are worthy of further investigation and characterisation.
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Affiliation(s)
- M E O'Brien
- Cancer Research Campaign Clinical Trials Unit, Selly Oak Hospital, Birmingham, U.K
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28
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Allen CA, Highton J, Palmer DG. Increased expression of p150,95 and CR3 leukocyte adhesion molecules by mononuclear phagocytes in rheumatoid synovial membranes. Comparison with osteoarthritic and normal synovial membranes. Arthritis Rheum 1989; 32:947-54. [PMID: 2569874 DOI: 10.1002/anr.1780320803] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The expression of leukocyte adhesion molecules CR3 (CD11b) and p150,95 (CD11c) in synovial tissue was evaluated immunohistochemically. Although a significant proportion of synoviocytes in normal and osteoarthritic synovial membranes expressed the leukocyte common antigen and CR3, very few expressed the p150,95 molecule. In contrast, p150,95 was more evident in rheumatoid synovial membranes. Expression of this molecule was strongest in synovial membranes with a prominent macrophage infiltrate and accumulation of mononuclear phagocytes at the joint surface; p150,95 was also present on interdigitating cells in lymphoid collections. The patterns of expression suggest that these leukocyte adhesion molecules may be important in the diapedesis of mononuclear phagocytes into and through inflamed synovial membranes, as well as in cellular interactions within rheumatoid synovial membranes.
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Affiliation(s)
- C A Allen
- Wellcome Medical Research Institute, University of Otago Medical School, Dunedin, New Zealand
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29
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Palmer DG, Hogg N, Allen CA, Highton J, Hessian PA. A mononuclear phagocyte subset associated with cell necrosis in rheumatoid nodules: identification with monoclonal antibody 5.5. Clin Immunol Immunopathol 1987; 45:17-28. [PMID: 3621682 DOI: 10.1016/0090-1229(87)90107-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A subset of mononuclear phagocytes identified by mAb 5.5 has been found within rheumatoid subcutaneous nodules. These cells appear to be derived directly from blood-borne monocytes. They form a variable proportion of the mononuclear phagocyte population within the nodule and are intimately associated with the tissue necrosis which characterizes these lesions. Necrosis appears within small aggregates of mAb 5.5-positive cells. Similar cells are also associated with localized extensions of necrosis through the palisade zone. Centrifugal extension of the necrotic centers through incorporation of the inner cells of the palisade layer appears to be an independent phenomenon.
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30
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Allen CA, Hogg N. Association of colorectal tumor epithelium expressing HLA-D/DR with CD8-positive T-cells and mononuclear phagocytes. Cancer Res 1987; 47:2919-23. [PMID: 3105871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Forty-eight human colorectal adenocarcinomas, removed at different stages of development, have been examined immunohistochemically for the expression of class II molecules and for the relationship of such class II expression to infiltrating leukocytes. Forty-four% of tumor epithelium samples express class II molecules. This expression is confined to the proteins coded for by the HLA-D/DR subregion although the surrounding infiltrating cells express HLA-D/DR, -DQ, and -DP coded proteins. In addition, there are significantly greater numbers of mononuclear phagocytes and T-cells of the CD8 antibody-positive subset associated with the tumors expressing class II molecules on tumor epithelium compared to the class II-negative tumors. The T-cells appear not to be activated judging by the lack of expression of the receptor for interleukin-2 but the mononuclear phagocytes express CR1, the receptor for the complement component C3b, which suggests that they are stimulated.
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31
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Palmer DG, Hogg N, Denholm I, Allen CA, Highton J, Hessian PA. Comparison of phenotype expression by mononuclear phagocytes within subcutaneous gouty tophi and rheumatoid nodules. Rheumatol Int 1987; 7:187-93. [PMID: 3321380 DOI: 10.1007/bf00541376] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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: 01/05/2023]
Abstract
The mononuclear phagocyte infiltrate which occupies the gout tophus has been compared with that of the subcutaneous rheumatoid nodule. In the gout tophus, macrophage migration appears to be at a relatively low level and effectively terminates once these cells have been recruited into the corona. In the nodule the evidence suggests that both macrophage and granulocyte populations continuously migrate towards, and are progressively incorporated into, the necrotic centres. These observations indicate that chemotactic activity in rheumatoid nodules is at a higher level than in gout tophi, or that the rheumatoid mononuclear phagocyte is more responsive to such stimuli.
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Affiliation(s)
- D G Palmer
- Department of Medicine, Wellcome Medical Research Institute, University of Otago Medical School, Dunedin, New Zealand
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32
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Woods JW, Pittman AW, Pulliam CC, Werk EE, Waider W, Allen CA. Renin profiling in hypertension and its use in treatment with propranolol and chlorthalidone. N Engl J Med 1976; 294:1137-43. [PMID: 772425 DOI: 10.1056/nejm197605202942101] [Citation(s) in RCA: 83] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We compared methods of classifying hypertension according to plasma renin activity in 54 patients with essential hypertension and examined the validity of using these classifications to choose between two hypotensive drugs. A prospective, double-blind crossover study was used. Normal values for plasma renin activity were established from 111 control subjects. Plasma renin activity was related to race and inversely to age in hypertensive patients (P less than 0.05) but not in normal subjects. Three methods of classification correlated well but did not identify exactly the same renin-suppressed patients. Chlorthalidone produced a greater reduction in blood pressure and restored blood pressure to normal in a larger percentage of patients in both low-renin (59 per cent) and normal-renin (32 per cent) subgroups than propranolol (12 and 16 per cent). Renin determinations are of limited benefit in the choice of therapy for most patients with essential hypertension.
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Kenoyer MR, Allen CA, Due TL, Schaffner S, Hale HW. Perforated amebic colitis: Case report and review of the literature. Ariz Med 1976; 33:181-4. [PMID: 1275745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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