2,566 research outputs found
Hierarchy Theory of Evolution and the Extended Evolutionary Synthesis: Some Epistemic Bridges, Some Conceptual Rifts
Contemporary evolutionary biology comprises a plural landscape of multiple co-existent conceptual frameworks and strenuous voices that disagree on the nature and scope of evolutionary theory. Since the mid-eighties, some of these conceptual frameworks have denounced the ontologies of the Modern Synthesis and of the updated Standard Theory of Evolution as unfinished or even flawed. In this paper, we analyze and compare two of those conceptual frameworks, namely Niles Eldredge’s Hierarchy Theory of Evolution (with its extended ontology of evolutionary entities) and the Extended Evolutionary Synthesis (with its proposal of an extended ontology of evolutionary processes), in an attempt to map some epistemic bridges (e.g. compatible views of causation; niche construction) and some conceptual rifts (e.g. extra-genetic inheritance; different perspectives on macroevolution; contrasting standpoints held in the “externalism–internalism” debate) that exist between them. This paper seeks to encourage theoretical, philosophical and historiographical discussions about pluralism or the possible unification of contemporary evolutionary biology
The emerging structure of the Extended Evolutionary Synthesis: where does Evo-Devo fit in?
The Extended Evolutionary Synthesis (EES) debate is gaining ground in contemporary evolutionary biology. In parallel, a number of philosophical standpoints have emerged in an attempt to clarify what exactly is represented by the EES. For Massimo Pigliucci, we are in the wake of the newest instantiation of a persisting Kuhnian paradigm; in contrast, Telmo Pievani has contended that the transition to an EES could be best represented as a progressive reformation of a prior Lakatosian scientific research program, with the extension of its Neo-Darwinian core and the addition of a brand-new protective belt of assumptions and auxiliary hypotheses. Here, we argue that those philosophical vantage points are not the only ways to interpret what current proposals to ‘extend’ the Modern Synthesis-derived ‘standard evolutionary theory’ (SET) entail in terms of theoretical change in evolutionary biology. We specifically propose the image of the emergent EES as a vast network of models and interweaved representations that, instantiated in diverse practices, are connected and related in multiple ways. Under that assumption, the EES could be articulated around a paraconsistent network of evolutionary theories (including some elements of the SET), as well as models, practices and representation systems of contemporary evolutionary biology, with edges and nodes that change their position and centrality as a consequence of the co-construction and stabilization of facts and historical discussions revolving around the epistemic goals of this area of the life sciences. We then critically examine the purported structure of the EES—published by Laland and collaborators in 2015—in light of our own network-based proposal. Finally, we consider which epistemic units of Evo-Devo are present or still missing from the EES, in preparation for further analyses of the topic of explanatory integration in this conceptual framework
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Multi-ancestry study of blood lipid levels identifies four loci interacting with physical activity.
Many genetic loci affect circulating lipid levels, but it remains unknown whether lifestyle factors, such as physical activity, modify these genetic effects. To identify lipid loci interacting with physical activity, we performed genome-wide analyses of circulating HDL cholesterol, LDL cholesterol, and triglyceride levels in up to 120,979 individuals of European, African, Asian, Hispanic, and Brazilian ancestry, with follow-up of suggestive associations in an additional 131,012 individuals. We find four loci, in/near CLASP1, LHX1, SNTA1, and CNTNAP2, that are associated with circulating lipid levels through interaction with physical activity; higher levels of physical activity enhance the HDL cholesterol-increasing effects of the CLASP1, LHX1, and SNTA1 loci and attenuate the LDL cholesterol-increasing effect of the CNTNAP2 locus. The CLASP1, LHX1, and SNTA1 regions harbor genes linked to muscle function and lipid metabolism. Our results elucidate the role of physical activity interactions in the genetic contribution to blood lipid levels
Diminished Criminal Responsibility: A Multinational Comparative Review
This article reviews the legal frameworks of diminished criminal responsibility in eighteen civil law jurisdictions across the globe—Brazil, Chile, China, the Czech Republic, Finland, France, Germany, Greece, Italy, Japan, Luxembourg, Poland, Portugal, Russia, Spain, Switzerland, Taiwan, and Turkey. Specifically, it reports the legal standards and main features of partial responsibility, associated penalty reductions, and potential dispositions following a partial responsibility finding. It also surveys empirical data on the prevalence of diminished responsibility as compared to criminal nonresponsibility. This article, which reflects contemporary penal codes and draws from both English and non-English sources, is the only known existing source to compile these partial responsibility standards or to delineate their
precise sentencing consequences. It is also the only known source in English to describe Portugal’s and Chile’s treatment of diminished responsibility. Providing a comparative overview of graduated responsibility in nearly twenty countries invites global discussion on whether and how society should recognize partial responsibility, as well as the punitive and therapeutic consequences that should attend this finding
Immunological imbalance between IFN-³ and IL-10 levels in the sera of patients with the cardiac form of Chagas disease
The immune response is crucial for protection against disease; however, immunological imbalances can lead to heart and digestive tract lesions in chagasic patients. Several studies have evaluated the cellular and humoral immune responses in chagasic patients in an attempt to correlate immunological findings with clinical forms of Chagas disease. Moreover, immunoglobulins and cytokines are important for parasitic control and are involved in lesion genesis. Here, cytokine and IgG isotype production were studied, using total epimastigote antigen on sera of chagasic patients with indeterminate (IND, n = 27) and cardiac (CARD, n = 16) forms of the disease. Samples from normal, uninfected individuals (NI, n = 30) were use as controls. The results showed that sera from both IND and CARD patients contained higher levels of Trypanosoma cruzi-specific IgG1 (IgG1) antibodies than sera from NI. No difference in IgG2 production levels was observed between NI, IND and CARD patients, nor was a difference in IL-10 and IFN-³ production detected in the sera of IND, CARD and NI patients. However, IND patients displayed a positive correlation between IL-10 and IFN-³ levels in serum, while CARD patients showed no such correlation, indicating an uncontrolled inflammatory response in CARD patients. These findings support the hypothesis that a lack of efficient regulation between IFN-³ and IL-10 productions in CARD patients may lead to cardiac immunopathology.CNP
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Impact of phenolic-rich olive leaf extract on blood pressure, plasma lipids and inflammatory markers: a randomised controlled trial
Purpose
Dietary polyphenols have been demonstrated to favourably modify a number of cardiovascular risk markers such as blood pressure (BP), endothelial function and plasma lipids. We conducted a randomised, double-blind, controlled, crossover trial to investigate the effects of a phenolic-rich olive leaf extract (OLE) on BP and a number of associated vascular and metabolic measures.
Methods
A total of 60 pre-hypertensive [systolic blood pressure (SBP): 121–140 mmHg; diastolic blood pressure (DBP): 81–90 mmHg] males [mean age 45 (±SD 12.7 years, BMI 26.7 (±3.21) kg/m2] consumed either OLE (136 mg oleuropein; 6 mg hydroxytyrosol) or a polyphenol-free control daily for 6 weeks before switching to the alternate arm after a 4-week washout.
Results
Daytime [−3.95 (±SD 11.48) mmHg, p = 0.027] and 24-h SBP [−3.33 (±SD 10.81) mmHg, p = 0.045] and daytime and 24-h DBP [−3.00 (±SD 8.54) mmHg, p = 0.025; −2.42 (±SD 7.61) mmHg, p = 0.039] were all significantly lower following OLE intake, relative to the control. Reductions in plasma total cholesterol [−0.32 (±SD 0.70) mmol/L, p = 0.002], LDL cholesterol [−0.19 (±SD 0.56) mmol/L, p = 0.017] and triglycerides [−0.18 (±SD 0.48), p = 0.008] were also induced by OLE compared to control, whilst a reduction in interleukin-8 [−0.63 (±SD 1.13) pg/ml; p = 0.026] was also detected. Other markers of inflammation, vascular function and glucose metabolism were not affected.
Conclusion
Our data support previous research, suggesting that OLE intake engenders hypotensive and lipid-lowering effects in vivo
Persistent effects of pre-Columbian plant domestication on Amazonian forest composition
The extent to which pre-Columbian societies altered Amazonian landscapes is hotly debated. We performed a basin-wide analysis of pre-Columbian impacts on Amazonian forests by overlaying known archaeological sites in Amazonia with the distributions and abundances of 85 woody species domesticated by pre-Columbian peoples. Domesticated species are five times more likely to be hyperdominant than non-domesticated species. Across the basin the relative abundance and richness of domesticated species increases in forests on and around archaeological sites. In southwestern and eastern Amazonia distance to archaeological sites strongly influences the relative abundance and richness of domesticated species. Our analyses indicate that modern tree communities in Amazonia are structured to an important extent by a long history of plant domestication by Amazonian peoples
Hyperdominance in the Amazonian tree flora
The vast extent of the Amazon Basin has historically restricted the study of its tree communities to the local and regional scales. Here, we provide empirical data on the commonness, rarity, and richness of lowland tree species across the entire Amazon Basin and Guiana Shield (Amazonia), collected in 1170 tree plots in all major forest types. Extrapolations suggest that Amazonia harbors roughly 16,000 tree species, of which just 227 (1.4%) account for half of all trees. Most of these are habitat specialists and only dominant in one or two regions of the basin. We discuss some implications of the finding that a small group of species--less diverse than the North American tree flora--accounts for half of the world's most diverse tree community.This work was
supported by Alberta Mennega Stichting; ALCOA Suriname;
Banco de la República; Center for Agricultural Research in
Suriname; Coordenação de Aperfeiçoamento de Pessoal de
Nível Superior (Plano Nacional de Pós-Graduação); Conselho
Nacional de Desenvovimento Científico e Tecnológico of Brazil
(CNPq) projects Programa de Pesquisas Ecológicas de Longa
Duração (PELD) (558069/2009-6), Programa de Apoio a
Núcleos de Excelência da Fundação de Amparo à Pesquisa
do Estado do Amazonas (PRONEX-FAPEAM) (1600/2006), Áreas
Úmidas, and MAUA; PELD (403792/2012-6), PPBio, CENBAM,
Universal (479599/2008-4), and Universal 307807-2009-6;
Fundação de Amparo À Pesquisa Do Estado Do Amazonas
(APEAM) projects DCR/2006, Hidroveg with FAPESP, and
PRONEX with CNPq; FAPESP; Colciencias; Duke University;
Ecopetrol; FEPIM 044/2003; the Field Museum; Conservation
International/DC (TEAM/INPA Manuas), Gordon and Betty
Moore Foundation; Guyana Forestry Commission; Investissement
d’Avenir grant of the French Agence Nationale de la Recherche
(ANR) (Centre d’Étude de la Biodiversité Amazonienne
ANR-10-LABX-0025); Margaret Mee Amazon Trust; Miquel
fonds; National Geographic Society (7754-04, 8047-06 to
P.M.J.); Netherlands Foundation for the Advancement of
Tropical Research WOTRO grants WB85- 335 and W84-581;
Primate Conservation Incorporated; Programme Ecosystèmes
Tropicaux (French Ministry of Ecology and Sustainable
Development; Shell Prospecting and Development Peru;
Smithsonian Institution’s Biological Diversity of the Guiana
Shield Program; Stichting het van Eeden-fonds; the Body
Shop; the Ministry of the Environment of Ecuador;
TROBIT; Tropenbos International; NSF (NSF-0743457 and
NSF-0101775 to P.M.J.); USAID; Variety Woods Guyana;
WWF-Brazil; WWF-Guianas; XIIéme Contrat de Plan Etat
Région-Guyane (French Government and European Union); and
grants to RAINFOR from the European Union, UK Natural
Environment Research Council, the Gordon and Betty Moore
Foundation, and U.S. National Geographic Society. O.L.P. is
supported by a European Research Council Advanced Grant and a
Royal Society Wolfson Research Merit Award
Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median ). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5 m Sloan Foundation Telescope at the Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July
Efectos adversos al metotrexate en una consulta externa de Reumatología
Introduction: Methotrexate (MTX) is a drug widely used in the treatment of various rheu- matic diseases such as rheumatoid arthritis and psoriatic arthritis, being a well-tolerated, inexpensive drug with proven efficacy in the control of joint and extra-articular symptoms.
Methodology: A descriptive, retrospective, cross-sectional study was conducted, 1,441 medical records were reviewed from a Rheumatology Private Outpatient Clinic at the Centro Clínico Universitario de Oriente in Ciudad Bolivar, Venezuela in the period December 2011 to December 2019; from these records, 202 records of patients who received MTX were selected, excluding 52 records because they did not complete successive consultations, leaving 150 records for the analysis.
Results: the sample was represented by 150 patients, whose average age was 50.2±14.3 years, the predominant sex was female with 83.3% (n=125). The main indication for me- thotrexate was for the treatment of rheumatoid arthritis with 56.0% (n=84). Adverse effects occurred in 16.7% of cases, with gastric intolerance being the most frequent with 36.0% (9 patients). No relationship was found with the dose of methotrexate and the presentation of adverse effects.
Conclusion: A low rate of adverse effects to MTX was evidenced in patients with rheumatic diseases, not related to the dose, and in less than 10% of the cases it was necessary to change treatment.Introducción: El metotrexate (MTX) es un fármaco ampliamente utilizado en el tratamiento de diversas enfermedades reumáticas como artritis reumatoide y artritis psoriásica, siendo un medicamento bien tolerado, económico y con eficacia comprobada en el control de los síntomas articulares y extraarticulares.
Metodología: Se realizó un estudio descriptivo, retrospectivo, transversal; se revisaron 1.441 historias médicas de una Consulta Externa Privada de Reumatología en el Centro Clí- nico Universitario de Oriente en Ciudad Bolívar, Venezuela en el periodo diciembre 2011 a diciembre 2019; de esas historias se seleccionaron 202 historias de pacientes que recibieron MTX, excluyéndose 52 historias porque no cumplieron consultas sucesivas, quedando para el análisis 150 historias.
Resultados: la muestra estuvo representada por 150 pacientes, cuya edad promedio fue de 50,2±14,3 años, el sexo predominante fue el femenino con 83,3% (n=125). La principal indicación del metotrexate fue para el tratamiento de artritis reumatoide con 56,0% (n=84). Se presentaron efectos adversos en 16,7% de los casos, siendo la intolerancia gástrica el más frecuente con 36,0% (9 pacientes). No se encontró relación con la dosis del metotrexate y la presentación de efectos adversos.
Conclusión: Se evidenció una baja tasa de efectos adversos al MTX en pacientes con enfermedades reumáticas, no relacionado a la dosis y en menos del 10% de los casos fue necesario realizar cambio de tratamiento
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