Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina

Autores
Suarez, Maria Fernanda; Crim, Nicolás; Monti, Jose Rodolfo; Esposito, Evangelina; Urrets Zavalía, Julio Alberto; Serra, Horacio Marcelo
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The purpose of our work was to study and compare the cornea and tear film of people and sheep inhabiting in a region of Argentinean Patagonia (PATG), and in a geographically and climatically different region in the Argentinean Pampa (CAPT). Methods: Using cross sectional study, corneal examinations were performed in people and Merino sheep inhabiting PATG and CAPT regions, respectively. All people completed a questionnaire related to work activity, diet, and the use of hats or sunglasses during their life. Eyes from all participants were examined with a portable handheld slitlamp biomicroscope (BM) to evaluate corneal appearance, epithelium integrity, and transparency. Later on, in a subgroup of participants we studied eyeblinking frequency (EBF), ocular surface staining (FS), breakup time (BUT), Schirmer Tear Test (STT), corneal structure using confocal laser scanning microscopy (CLSM) and light microscopy (LM), and concentrations of serum ascorbate (sAA). Results: BM studies revealed numerous cases of Climatic Droplets Keratopathy (CDK) only in people inhabiting the PATG region. CLSM studies confirmed typical punctiform deposits at the Bowman´s layer in CDK patients living in that region. CLSM images from sheep did not show any abnormalities at the Bowman´s layer but exhibited small hyper reflective dots at the epithelium only in animals pasturing in the PATG region. FS and EBF mean values were significant higher in sheep grazing in the PATG region (p <0.05). No differences were found in surface eye tests when people from both regions were analyzed. Low sAA levels were found only in CDK people living in PATG region. Conclusions: CDK is a multi-factorial disease not only associated to harsh climate. We provide data that low sAA levels can play a role in its genesis in Patagonia patients'... Sheep pasturing in this region with a high prevalence of CDK have high concentration of sAA and did not present any sub epithelial corneal abnormalities.
Fil: Suarez, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; Argentina
Fil: Crim, Nicolás. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Monti, Jose Rodolfo. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Esposito, Evangelina. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Urrets Zavalía, Julio Alberto. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Serra, Horacio Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; Argentina
Materia
CORNEA
RADIACION ULTRAVIOLETA
CORNEAL DEGENERATION
OCULAR SURFACE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/46806
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/46806
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of ArgentinaSuarez, Maria FernandaCrim, NicolásMonti, Jose RodolfoEsposito, EvangelinaUrrets Zavalía, Julio AlbertoSerra, Horacio MarceloCORNEARADIACION ULTRAVIOLETACORNEAL DEGENERATIONOCULAR SURFACEhttps://purl.org/becyt/ford/3.2https://purl.org/becyt/ford/3The purpose of our work was to study and compare the cornea and tear film of people and sheep inhabiting in a region of Argentinean Patagonia (PATG), and in a geographically and climatically different region in the Argentinean Pampa (CAPT). Methods: Using cross sectional study, corneal examinations were performed in people and Merino sheep inhabiting PATG and CAPT regions, respectively. All people completed a questionnaire related to work activity, diet, and the use of hats or sunglasses during their life. Eyes from all participants were examined with a portable handheld slitlamp biomicroscope (BM) to evaluate corneal appearance, epithelium integrity, and transparency. Later on, in a subgroup of participants we studied eyeblinking frequency (EBF), ocular surface staining (FS), breakup time (BUT), Schirmer Tear Test (STT), corneal structure using confocal laser scanning microscopy (CLSM) and light microscopy (LM), and concentrations of serum ascorbate (sAA). Results: BM studies revealed numerous cases of Climatic Droplets Keratopathy (CDK) only in people inhabiting the PATG region. CLSM studies confirmed typical punctiform deposits at the Bowman´s layer in CDK patients living in that region. CLSM images from sheep did not show any abnormalities at the Bowman´s layer but exhibited small hyper reflective dots at the epithelium only in animals pasturing in the PATG region. FS and EBF mean values were significant higher in sheep grazing in the PATG region (p <0.05). No differences were found in surface eye tests when people from both regions were analyzed. Low sAA levels were found only in CDK people living in PATG region. Conclusions: CDK is a multi-factorial disease not only associated to harsh climate. We provide data that low sAA levels can play a role in its genesis in Patagonia patients'... Sheep pasturing in this region with a high prevalence of CDK have high concentration of sAA and did not present any sub epithelial corneal abnormalities.Fil: Suarez, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaFil: Crim, Nicolás. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; ArgentinaFil: Monti, Jose Rodolfo. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; ArgentinaFil: Esposito, Evangelina. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; ArgentinaFil: Urrets Zavalía, Julio Alberto. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; ArgentinaFil: Serra, Horacio Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; ArgentinaOMICS2016-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/46806Suarez, Maria Fernanda; Crim, Nicolás; Monti, Jose Rodolfo; Esposito, Evangelina; Urrets Zavalía, Julio Alberto; et al.; Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina; OMICS; Clinical & Experimental Ophthalmology.; 6; 6; 1-20162155-9570CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.4172/2155-9570.1000499info:eu-repo/semantics/altIdentifier/url/https://bit.ly/2sv9BTEinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:20:23Zoai:ri.conicet.gov.ar:11336/46806instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 12:20:24.08CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
title Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
spellingShingle Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
Suarez, Maria Fernanda
CORNEA
RADIACION ULTRAVIOLETA
CORNEAL DEGENERATION
OCULAR SURFACE
title_short Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
title_full Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
title_fullStr Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
title_full_unstemmed Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
title_sort Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina
dc.creator.none.fl_str_mv Suarez, Maria Fernanda
Crim, Nicolás
Monti, Jose Rodolfo
Esposito, Evangelina
Urrets Zavalía, Julio Alberto
Serra, Horacio Marcelo
author Suarez, Maria Fernanda
author_facet Suarez, Maria Fernanda
Crim, Nicolás
Monti, Jose Rodolfo
Esposito, Evangelina
Urrets Zavalía, Julio Alberto
Serra, Horacio Marcelo
author_role author
author2 Crim, Nicolás
Monti, Jose Rodolfo
Esposito, Evangelina
Urrets Zavalía, Julio Alberto
Serra, Horacio Marcelo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CORNEA
RADIACION ULTRAVIOLETA
CORNEAL DEGENERATION
OCULAR SURFACE
topic CORNEA
RADIACION ULTRAVIOLETA
CORNEAL DEGENERATION
OCULAR SURFACE
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.2
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv The purpose of our work was to study and compare the cornea and tear film of people and sheep inhabiting in a region of Argentinean Patagonia (PATG), and in a geographically and climatically different region in the Argentinean Pampa (CAPT). Methods: Using cross sectional study, corneal examinations were performed in people and Merino sheep inhabiting PATG and CAPT regions, respectively. All people completed a questionnaire related to work activity, diet, and the use of hats or sunglasses during their life. Eyes from all participants were examined with a portable handheld slitlamp biomicroscope (BM) to evaluate corneal appearance, epithelium integrity, and transparency. Later on, in a subgroup of participants we studied eyeblinking frequency (EBF), ocular surface staining (FS), breakup time (BUT), Schirmer Tear Test (STT), corneal structure using confocal laser scanning microscopy (CLSM) and light microscopy (LM), and concentrations of serum ascorbate (sAA). Results: BM studies revealed numerous cases of Climatic Droplets Keratopathy (CDK) only in people inhabiting the PATG region. CLSM studies confirmed typical punctiform deposits at the Bowman´s layer in CDK patients living in that region. CLSM images from sheep did not show any abnormalities at the Bowman´s layer but exhibited small hyper reflective dots at the epithelium only in animals pasturing in the PATG region. FS and EBF mean values were significant higher in sheep grazing in the PATG region (p <0.05). No differences were found in surface eye tests when people from both regions were analyzed. Low sAA levels were found only in CDK people living in PATG region. Conclusions: CDK is a multi-factorial disease not only associated to harsh climate. We provide data that low sAA levels can play a role in its genesis in Patagonia patients'... Sheep pasturing in this region with a high prevalence of CDK have high concentration of sAA and did not present any sub epithelial corneal abnormalities.
Fil: Suarez, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; Argentina
Fil: Crim, Nicolás. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Monti, Jose Rodolfo. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Esposito, Evangelina. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Urrets Zavalía, Julio Alberto. Universidad Catolica de Córdoba. Facultad de Medicina. Clinica Universitaria Reina Fabiola; Argentina
Fil: Serra, Horacio Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Centro de Investigaciones en Bioquímica Clínica e Inmunología; Argentina
description The purpose of our work was to study and compare the cornea and tear film of people and sheep inhabiting in a region of Argentinean Patagonia (PATG), and in a geographically and climatically different region in the Argentinean Pampa (CAPT). Methods: Using cross sectional study, corneal examinations were performed in people and Merino sheep inhabiting PATG and CAPT regions, respectively. All people completed a questionnaire related to work activity, diet, and the use of hats or sunglasses during their life. Eyes from all participants were examined with a portable handheld slitlamp biomicroscope (BM) to evaluate corneal appearance, epithelium integrity, and transparency. Later on, in a subgroup of participants we studied eyeblinking frequency (EBF), ocular surface staining (FS), breakup time (BUT), Schirmer Tear Test (STT), corneal structure using confocal laser scanning microscopy (CLSM) and light microscopy (LM), and concentrations of serum ascorbate (sAA). Results: BM studies revealed numerous cases of Climatic Droplets Keratopathy (CDK) only in people inhabiting the PATG region. CLSM studies confirmed typical punctiform deposits at the Bowman´s layer in CDK patients living in that region. CLSM images from sheep did not show any abnormalities at the Bowman´s layer but exhibited small hyper reflective dots at the epithelium only in animals pasturing in the PATG region. FS and EBF mean values were significant higher in sheep grazing in the PATG region (p <0.05). No differences were found in surface eye tests when people from both regions were analyzed. Low sAA levels were found only in CDK people living in PATG region. Conclusions: CDK is a multi-factorial disease not only associated to harsh climate. We provide data that low sAA levels can play a role in its genesis in Patagonia patients'... Sheep pasturing in this region with a high prevalence of CDK have high concentration of sAA and did not present any sub epithelial corneal abnormalities.
publishDate 2016
dc.date.none.fl_str_mv 2016-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/46806
Suarez, Maria Fernanda; Crim, Nicolás; Monti, Jose Rodolfo; Esposito, Evangelina; Urrets Zavalía, Julio Alberto; et al.; Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina; OMICS; Clinical & Experimental Ophthalmology.; 6; 6; 1-2016
2155-9570
CONICET Digital
CONICET
url http://hdl.handle.net/11336/46806
identifier_str_mv Suarez, Maria Fernanda; Crim, Nicolás; Monti, Jose Rodolfo; Esposito, Evangelina; Urrets Zavalía, Julio Alberto; et al.; Clinical, functional and structural studies of humans and merino sheeps corneas from two different regions of Argentina; OMICS; Clinical & Experimental Ophthalmology.; 6; 6; 1-2016
2155-9570
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.4172/2155-9570.1000499
info:eu-repo/semantics/altIdentifier/url/https://bit.ly/2sv9BTE
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv OMICS
publisher.none.fl_str_mv OMICS
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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