Safety evaluation of very high doses of intravitreal topotecan in rabbits
- Autores
- del Sole, Maria Jose; Nejamkin, Pablo; Clausse, María; Farall, Rodolfo Andres; Chan, Débora; Lamas, Gabriela; Lubieniecki, Fabiana; Schaiquevich, Paula Susana; Abramson, David
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- documento de conferencia
- Estado
- versión publicada
- Descripción
- Introduction Intravitreal topotecan (TPT) at 90 μg has shown promise for treating intraocular retinoblastoma. However, the control of refractory or recurrent vitreous seeds and retinal tumors remains a challenge and these difficult-to-treat eyes may require higher doses than those currently used in the clinic. Objectives To evaluate systemic and ocular safety of monthly very high-doses intravitreal injections of TPT in rabbits. Methods Systemic and ocular toxicity was assessed in non-tumor-bearing New Zealand rabbits after three monthly intravitreal injections of sterile water, 50 μg, 100 μg or 200 μg of TPT into one eye and vehicle into the contralateral. Animals were evaluated monthly for general and ophthalmic clinical status including direct and indirect ophthalmoscopy, biomicroscopy, and scotopic electroretinography (ERG). One month after the last injection, the eyes were enucleated and subjected to histological assessment. Linear mixed effects models were used for the statistical analysis of the treatment effects. Results Weight, hair loss, or changes in hematologic values were absent during the study period across all animal groups. No evidence of retinal or optic nerve alterations were evidenced by fundus examination except in 2 eyes treated with 200 μg TPT that showed attenuation of retinal vasculature. Histological examination revealed no distinct abnormalities except for one eye treated with 200 μg TPT that showed a focus area of retinal distortion with loss of photoreceptors and gliosis. In line, a significant decrease in the a- and b-wave amplitudes of the ERG recording was registered for the group of eyes treated with 200 μg TPT despite ERG parameters remained within normal values for visual function. Conclusion Intravitreal TPT up to 100 μg per dose was safe in the rabbit’s eye. The results suggest a promising potential for clinical application of doses up to 200 μg TPT in relapse/refractory cases of retinoblastoma.
Fil: del Sole, Maria Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina
Fil: Nejamkin, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina
Fil: Clausse, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina
Fil: Farall, Rodolfo Andres. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina
Fil: Chan, Débora. Universidad Austral. Facultad de Ingeniería; Argentina
Fil: Lamas, Gabriela. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; Argentina
Fil: Lubieniecki, Fabiana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; Argentina
Fil: Schaiquevich, Paula Susana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan"; Argentina
Fil: Abramson, David. Memorial Sloan-Kettering Cancer Center; Estados Unidos
XXVI Biennial Meeting of the International Society for Eye Research
Ciudad Autónoma de Buenos Aires
Argentina
International Society for Eye Research - Materia
-
Retinoblastoma
Safety evaluation
Retinoblastoma
Rabbits
Intravitreal topotecan - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/258365
Ver los metadatos del registro completo
id |
CONICETDig_2c143f16784af3262fd8adb1b0b29f4f |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/258365 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Safety evaluation of very high doses of intravitreal topotecan in rabbitsdel Sole, Maria JoseNejamkin, PabloClausse, MaríaFarall, Rodolfo AndresChan, DéboraLamas, GabrielaLubieniecki, FabianaSchaiquevich, Paula SusanaAbramson, DavidRetinoblastomaSafety evaluationRetinoblastomaRabbitsIntravitreal topotecanhttps://purl.org/becyt/ford/3.2https://purl.org/becyt/ford/3Introduction Intravitreal topotecan (TPT) at 90 μg has shown promise for treating intraocular retinoblastoma. However, the control of refractory or recurrent vitreous seeds and retinal tumors remains a challenge and these difficult-to-treat eyes may require higher doses than those currently used in the clinic. Objectives To evaluate systemic and ocular safety of monthly very high-doses intravitreal injections of TPT in rabbits. Methods Systemic and ocular toxicity was assessed in non-tumor-bearing New Zealand rabbits after three monthly intravitreal injections of sterile water, 50 μg, 100 μg or 200 μg of TPT into one eye and vehicle into the contralateral. Animals were evaluated monthly for general and ophthalmic clinical status including direct and indirect ophthalmoscopy, biomicroscopy, and scotopic electroretinography (ERG). One month after the last injection, the eyes were enucleated and subjected to histological assessment. Linear mixed effects models were used for the statistical analysis of the treatment effects. Results Weight, hair loss, or changes in hematologic values were absent during the study period across all animal groups. No evidence of retinal or optic nerve alterations were evidenced by fundus examination except in 2 eyes treated with 200 μg TPT that showed attenuation of retinal vasculature. Histological examination revealed no distinct abnormalities except for one eye treated with 200 μg TPT that showed a focus area of retinal distortion with loss of photoreceptors and gliosis. In line, a significant decrease in the a- and b-wave amplitudes of the ERG recording was registered for the group of eyes treated with 200 μg TPT despite ERG parameters remained within normal values for visual function. Conclusion Intravitreal TPT up to 100 μg per dose was safe in the rabbit’s eye. The results suggest a promising potential for clinical application of doses up to 200 μg TPT in relapse/refractory cases of retinoblastoma.Fil: del Sole, Maria Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; ArgentinaFil: Nejamkin, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; ArgentinaFil: Clausse, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; ArgentinaFil: Farall, Rodolfo Andres. Universidad de Buenos Aires. Facultad de Ingeniería; ArgentinaFil: Chan, Débora. Universidad Austral. Facultad de Ingeniería; ArgentinaFil: Lamas, Gabriela. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; ArgentinaFil: Lubieniecki, Fabiana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; ArgentinaFil: Schaiquevich, Paula Susana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan"; ArgentinaFil: Abramson, David. Memorial Sloan-Kettering Cancer Center; Estados UnidosXXVI Biennial Meeting of the International Society for Eye ResearchCiudad Autónoma de Buenos AiresArgentinaInternational Society for Eye ResearchInternational Society for Eye Research2024info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/258365Safety evaluation of very high doses of intravitreal topotecan in rabbits; XXVI Biennial Meeting of the International Society for Eye Research; Ciudad Autónoma de Buenos Aires; Argentina; 2024; 562-562CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://react-profile.org/ebook/ISER2024_AbstractBook/Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:07:10Zoai:ri.conicet.gov.ar:11336/258365instacron: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:34982025-09-03 10:07:11.121CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
title |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
spellingShingle |
Safety evaluation of very high doses of intravitreal topotecan in rabbits del Sole, Maria Jose Retinoblastoma Safety evaluation Retinoblastoma Rabbits Intravitreal topotecan |
title_short |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
title_full |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
title_fullStr |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
title_full_unstemmed |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
title_sort |
Safety evaluation of very high doses of intravitreal topotecan in rabbits |
dc.creator.none.fl_str_mv |
del Sole, Maria Jose Nejamkin, Pablo Clausse, María Farall, Rodolfo Andres Chan, Débora Lamas, Gabriela Lubieniecki, Fabiana Schaiquevich, Paula Susana Abramson, David |
author |
del Sole, Maria Jose |
author_facet |
del Sole, Maria Jose Nejamkin, Pablo Clausse, María Farall, Rodolfo Andres Chan, Débora Lamas, Gabriela Lubieniecki, Fabiana Schaiquevich, Paula Susana Abramson, David |
author_role |
author |
author2 |
Nejamkin, Pablo Clausse, María Farall, Rodolfo Andres Chan, Débora Lamas, Gabriela Lubieniecki, Fabiana Schaiquevich, Paula Susana Abramson, David |
author2_role |
author author author author author author author author |
dc.subject.none.fl_str_mv |
Retinoblastoma Safety evaluation Retinoblastoma Rabbits Intravitreal topotecan |
topic |
Retinoblastoma Safety evaluation Retinoblastoma Rabbits Intravitreal topotecan |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/3.2 https://purl.org/becyt/ford/3 |
dc.description.none.fl_txt_mv |
Introduction Intravitreal topotecan (TPT) at 90 μg has shown promise for treating intraocular retinoblastoma. However, the control of refractory or recurrent vitreous seeds and retinal tumors remains a challenge and these difficult-to-treat eyes may require higher doses than those currently used in the clinic. Objectives To evaluate systemic and ocular safety of monthly very high-doses intravitreal injections of TPT in rabbits. Methods Systemic and ocular toxicity was assessed in non-tumor-bearing New Zealand rabbits after three monthly intravitreal injections of sterile water, 50 μg, 100 μg or 200 μg of TPT into one eye and vehicle into the contralateral. Animals were evaluated monthly for general and ophthalmic clinical status including direct and indirect ophthalmoscopy, biomicroscopy, and scotopic electroretinography (ERG). One month after the last injection, the eyes were enucleated and subjected to histological assessment. Linear mixed effects models were used for the statistical analysis of the treatment effects. Results Weight, hair loss, or changes in hematologic values were absent during the study period across all animal groups. No evidence of retinal or optic nerve alterations were evidenced by fundus examination except in 2 eyes treated with 200 μg TPT that showed attenuation of retinal vasculature. Histological examination revealed no distinct abnormalities except for one eye treated with 200 μg TPT that showed a focus area of retinal distortion with loss of photoreceptors and gliosis. In line, a significant decrease in the a- and b-wave amplitudes of the ERG recording was registered for the group of eyes treated with 200 μg TPT despite ERG parameters remained within normal values for visual function. Conclusion Intravitreal TPT up to 100 μg per dose was safe in the rabbit’s eye. The results suggest a promising potential for clinical application of doses up to 200 μg TPT in relapse/refractory cases of retinoblastoma. Fil: del Sole, Maria Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina Fil: Nejamkin, Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina Fil: Clausse, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina Fil: Farall, Rodolfo Andres. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina Fil: Chan, Débora. Universidad Austral. Facultad de Ingeniería; Argentina Fil: Lamas, Gabriela. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; Argentina Fil: Lubieniecki, Fabiana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan". Servicio de Patología; Argentina Fil: Schaiquevich, Paula Susana. Gobierno de la Ciudad de Buenos Aires. Hospital de Pediatría "Juan P. Garrahan"; Argentina Fil: Abramson, David. Memorial Sloan-Kettering Cancer Center; Estados Unidos XXVI Biennial Meeting of the International Society for Eye Research Ciudad Autónoma de Buenos Aires Argentina International Society for Eye Research |
description |
Introduction Intravitreal topotecan (TPT) at 90 μg has shown promise for treating intraocular retinoblastoma. However, the control of refractory or recurrent vitreous seeds and retinal tumors remains a challenge and these difficult-to-treat eyes may require higher doses than those currently used in the clinic. Objectives To evaluate systemic and ocular safety of monthly very high-doses intravitreal injections of TPT in rabbits. Methods Systemic and ocular toxicity was assessed in non-tumor-bearing New Zealand rabbits after three monthly intravitreal injections of sterile water, 50 μg, 100 μg or 200 μg of TPT into one eye and vehicle into the contralateral. Animals were evaluated monthly for general and ophthalmic clinical status including direct and indirect ophthalmoscopy, biomicroscopy, and scotopic electroretinography (ERG). One month after the last injection, the eyes were enucleated and subjected to histological assessment. Linear mixed effects models were used for the statistical analysis of the treatment effects. Results Weight, hair loss, or changes in hematologic values were absent during the study period across all animal groups. No evidence of retinal or optic nerve alterations were evidenced by fundus examination except in 2 eyes treated with 200 μg TPT that showed attenuation of retinal vasculature. Histological examination revealed no distinct abnormalities except for one eye treated with 200 μg TPT that showed a focus area of retinal distortion with loss of photoreceptors and gliosis. In line, a significant decrease in the a- and b-wave amplitudes of the ERG recording was registered for the group of eyes treated with 200 μg TPT despite ERG parameters remained within normal values for visual function. Conclusion Intravitreal TPT up to 100 μg per dose was safe in the rabbit’s eye. The results suggest a promising potential for clinical application of doses up to 200 μg TPT in relapse/refractory cases of retinoblastoma. |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject Congreso Book http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia |
status_str |
publishedVersion |
format |
conferenceObject |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/258365 Safety evaluation of very high doses of intravitreal topotecan in rabbits; XXVI Biennial Meeting of the International Society for Eye Research; Ciudad Autónoma de Buenos Aires; Argentina; 2024; 562-562 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/258365 |
identifier_str_mv |
Safety evaluation of very high doses of intravitreal topotecan in rabbits; XXVI Biennial Meeting of the International Society for Eye Research; Ciudad Autónoma de Buenos Aires; Argentina; 2024; 562-562 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://react-profile.org/ebook/ISER2024_AbstractBook/ |
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 application/pdf |
dc.coverage.none.fl_str_mv |
Internacional |
dc.publisher.none.fl_str_mv |
International Society for Eye Research |
publisher.none.fl_str_mv |
International Society for Eye Research |
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 |
_version_ |
1842269992948596736 |
score |
13.13397 |