Mother-child transmission of immunoglobulins G.
Autor(a) principal: | |
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Data de Publicação: | 1995 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666 |
Resumo: | The placental transfer of immunoglobulins is made by active transport and only IgG class of immunoglobulins is transferred. In a full-term gestation IgG concentration is usually higher in the cord serum than in the mother serum. It has been shown that the ratio of cord/maternal IgG is higher when maternal IgG values are low. A series of 44 mother-child pairs from the north of Portugal were studied. Quantitative determination of IgG in all sera was made by single radial immunodiffusion and results were expressed in milligrams/deciliter (mg/dl). In the first 48 hours after delivery, mothers were interviewed and clinical, social and demographic data were collected. In 35 pairs, cord IgG exceeded the corresponding maternal concentration. The ratio of cord/maternal IgG ranged from 0.75 to 2.86 (mean 1.27). From all studied variables only maternal IgG concentration and age were correlated with that ratio. Transplacental concentration (ratio of cord/maternal IgG) was higher for lower levels of maternal IgG. Significant contribution of maternal age did not stand when a woman with extreme values of IgG and age was withdrawn from the analysis. Values found for this series of Portuguese mother-child pairs were similar to those found for other caucasian populations and are in agreement with current proposed models for placental transfer of IgG. |
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Mother-child transmission of immunoglobulins G.Transmissão mãe-filho de imunoglobulinas G.The placental transfer of immunoglobulins is made by active transport and only IgG class of immunoglobulins is transferred. In a full-term gestation IgG concentration is usually higher in the cord serum than in the mother serum. It has been shown that the ratio of cord/maternal IgG is higher when maternal IgG values are low. A series of 44 mother-child pairs from the north of Portugal were studied. Quantitative determination of IgG in all sera was made by single radial immunodiffusion and results were expressed in milligrams/deciliter (mg/dl). In the first 48 hours after delivery, mothers were interviewed and clinical, social and demographic data were collected. In 35 pairs, cord IgG exceeded the corresponding maternal concentration. The ratio of cord/maternal IgG ranged from 0.75 to 2.86 (mean 1.27). From all studied variables only maternal IgG concentration and age were correlated with that ratio. Transplacental concentration (ratio of cord/maternal IgG) was higher for lower levels of maternal IgG. Significant contribution of maternal age did not stand when a woman with extreme values of IgG and age was withdrawn from the analysis. Values found for this series of Portuguese mother-child pairs were similar to those found for other caucasian populations and are in agreement with current proposed models for placental transfer of IgG.The placental transfer of immunoglobulins is made by active transport and only IgG class of immunoglobulins is transferred. In a full-term gestation IgG concentration is usually higher in the cord serum than in the mother serum. It has been shown that the ratio of cord/maternal IgG is higher when maternal IgG values are low. A series of 44 mother-child pairs from the north of Portugal were studied. Quantitative determination of IgG in all sera was made by single radial immunodiffusion and results were expressed in milligrams/deciliter (mg/dl). In the first 48 hours after delivery, mothers were interviewed and clinical, social and demographic data were collected. In 35 pairs, cord IgG exceeded the corresponding maternal concentration. The ratio of cord/maternal IgG ranged from 0.75 to 2.86 (mean 1.27). From all studied variables only maternal IgG concentration and age were correlated with that ratio. Transplacental concentration (ratio of cord/maternal IgG) was higher for lower levels of maternal IgG. Significant contribution of maternal age did not stand when a woman with extreme values of IgG and age was withdrawn from the analysis. Values found for this series of Portuguese mother-child pairs were similar to those found for other caucasian populations and are in agreement with current proposed models for placental transfer of IgG.Ordem dos Médicos1995-02-27info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666oai:ojs.www.actamedicaportuguesa.com:article/2666Acta Médica Portuguesa; Vol. 8 No. 2 (1995): Fevereiro; 81-5Acta Médica Portuguesa; Vol. 8 N.º 2 (1995): Fevereiro; 81-51646-07580870-399Xreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPporhttps://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666/2057Machado, A PGonçalves, GBarros, HNascimento, M Sinfo:eu-repo/semantics/openAccess2022-12-20T11:00:56Zoai:ojs.www.actamedicaportuguesa.com:article/2666Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:17:53.079008Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Mother-child transmission of immunoglobulins G. Transmissão mãe-filho de imunoglobulinas G. |
title |
Mother-child transmission of immunoglobulins G. |
spellingShingle |
Mother-child transmission of immunoglobulins G. Machado, A P |
title_short |
Mother-child transmission of immunoglobulins G. |
title_full |
Mother-child transmission of immunoglobulins G. |
title_fullStr |
Mother-child transmission of immunoglobulins G. |
title_full_unstemmed |
Mother-child transmission of immunoglobulins G. |
title_sort |
Mother-child transmission of immunoglobulins G. |
author |
Machado, A P |
author_facet |
Machado, A P Gonçalves, G Barros, H Nascimento, M S |
author_role |
author |
author2 |
Gonçalves, G Barros, H Nascimento, M S |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Machado, A P Gonçalves, G Barros, H Nascimento, M S |
description |
The placental transfer of immunoglobulins is made by active transport and only IgG class of immunoglobulins is transferred. In a full-term gestation IgG concentration is usually higher in the cord serum than in the mother serum. It has been shown that the ratio of cord/maternal IgG is higher when maternal IgG values are low. A series of 44 mother-child pairs from the north of Portugal were studied. Quantitative determination of IgG in all sera was made by single radial immunodiffusion and results were expressed in milligrams/deciliter (mg/dl). In the first 48 hours after delivery, mothers were interviewed and clinical, social and demographic data were collected. In 35 pairs, cord IgG exceeded the corresponding maternal concentration. The ratio of cord/maternal IgG ranged from 0.75 to 2.86 (mean 1.27). From all studied variables only maternal IgG concentration and age were correlated with that ratio. Transplacental concentration (ratio of cord/maternal IgG) was higher for lower levels of maternal IgG. Significant contribution of maternal age did not stand when a woman with extreme values of IgG and age was withdrawn from the analysis. Values found for this series of Portuguese mother-child pairs were similar to those found for other caucasian populations and are in agreement with current proposed models for placental transfer of IgG. |
publishDate |
1995 |
dc.date.none.fl_str_mv |
1995-02-27 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666 oai:ojs.www.actamedicaportuguesa.com:article/2666 |
url |
https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666 |
identifier_str_mv |
oai:ojs.www.actamedicaportuguesa.com:article/2666 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666 https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/2666/2057 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
dc.publisher.none.fl_str_mv |
Ordem dos Médicos |
publisher.none.fl_str_mv |
Ordem dos Médicos |
dc.source.none.fl_str_mv |
Acta Médica Portuguesa; Vol. 8 No. 2 (1995): Fevereiro; 81-5 Acta Médica Portuguesa; Vol. 8 N.º 2 (1995): Fevereiro; 81-5 1646-0758 0870-399X reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799130631508066304 |