Endoscopic features of gastrointestinal amyloid light-chain amyloidosis

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dc.article.number118
dc.contributor.authorLatorre G.
dc.contributor.authorVargas J.I.
dc.contributor.authorEspino A.
dc.contributor.authorLatorre G.
dc.contributor.authorVargas J.I.
dc.contributor.authorEspino A.
dc.date.accessioned2025-05-01T10:32:27Z
dc.date.available2025-05-01T10:32:27Z
dc.date.issued2021
dc.description.abstract© 2021. The American Astronomical Society. All rights reserved..We discuss the largest and most homogeneous spectroscopic data set of field RR Lyrae variables (RRLs) available to date. We estimated abundances using both high-resolution and low-resolution (ΔS method) spectra for fundamental (RRab) and first overtone (RRc) RRLs. The iron abundances for 7941 RRLs were supplemented with similar estimates that are available in the literature, ending up with 9015 RRLs (6150 RRab, 2865 RRc). The metallicity distribution shows a mean value of [Fe/H] = -1.51 ± 0.01, and σ(standard deviation) = 0.41 dex with a long metal-poor tail approaching [Fe/H] ≃ - 3 and a sharp metal-rich tail approaching solar iron abundance. The RRab variables are more metal-rich ([Fe/H]ab = -1.48 ± 0.01, σ = 0.41 dex) than RRc variables ([Fe/H]c = -1.58 ± 0.01, σ = 0.40 dex). The relative fraction of RRab variables in the Bailey diagram (visual amplitude versus period) located along the short-period (more metal-rich) and the long-period (more metal-poor) sequences are 80% and 20%, while RRc variables display an opposite trend, namely 30% and 70%, respectively. We found that the pulsation period of both RRab and RRc variables steadily decreases when moving from the metal-poor to the metal-rich regime. The visual amplitude shows the same trend, but RRc amplitudes are almost two times more sensitive than RRab amplitudes to metallicity. We also investigated the dependence of the population ratio (N c /Ntot) of field RRLs on the metallicity and we found that the distribution is more complex than in globular clusters. The population ratio steadily increases from ∼0.25 to ∼0.36 in the metal-poor regime, it decreases from ∼0.36 to ∼0.18 for -1.8 ≤ [Fe/H] ≤ -0.9 and it increases to a value of ∼0.3 approaching solar iron abundance.
dc.description.funderNational Institutes of Health
dc.description.funderNational Cancer Institute
dc.format.extent73 páginas
dc.fuente.origenScopus
dc.identifier.doi10.1016/S2468-1253(21)00222-3
dc.identifier.eisbn978-1-0716-1534-8
dc.identifier.eissn15384357
dc.identifier.isbn978-1-0716-1533-1
dc.identifier.issn24681253
dc.identifier.pubmedid34509193
dc.identifier.scieloidS0718-69242020000300109
dc.identifier.scopusidSCOPUS_ID:85115990165
dc.identifier.urihttps://doi.org/10.1016/S2468-1253(21)00222-3
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/103851
dc.identifier.wosidWOS:000990723500005
dc.information.autorucEscuela de Medicina; Espino Espino Alberto Antonio; 0000-0001-5707-6290; 146018
dc.information.autorucEscuela de Medicina; Vargas Dominguez Jose Ignacio; 0000-0002-1547-2292; 120713
dc.information.autorucEscuela de Medicina; Latorre Selvat Gonzalo Ignacio; S/I; 179226
dc.issue.numero10
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final73
dc.pagina.inicio55
dc.publisherHUMANA PRESS INC
dc.relation.ispartofThe Lancet Gastroenterology and Hepatology
dc.revistaThe Lancet Gastroenterology and Hepatology
dc.rightsAcceso cerrado
dc.subjectChile
dc.subjectHunting
dc.subjectSouthern puna
dc.subjectVicuñas
dc.subjectZooarchaeology
dc.subject.ddc610
dc.subject.deweyMedicina y saludes_ES
dc.subject.ods03 Good health and well-being
dc.subject.odspa03 Salud y bienestar
dc.titleEndoscopic features of gastrointestinal amyloid light-chain amyloidosis
dc.typeartículo
dc.volumen6
sipa.codpersvinculados146018
sipa.codpersvinculados120713
sipa.codpersvinculados179226
sipa.indexScopus
sipa.trazabilidadCarga WOS-SCOPUS;01-05-2025
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