Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians.
Given their well-developed systems of innate and adaptive immunity, global population declines of amphibians are particularly perplexing. To investigate the role of the major histocompatibility complex (MHC) in conferring pathogen resistance, we challenged Xenopus laevis tadpoles bearing different c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2008-07-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC2443284?pdf=render |
| _version_ | 1811281497492029440 |
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| author | Seth M Barribeau Jandouwe Villinger Bruce Waldman |
| author_facet | Seth M Barribeau Jandouwe Villinger Bruce Waldman |
| author_sort | Seth M Barribeau |
| collection | DOAJ |
| description | Given their well-developed systems of innate and adaptive immunity, global population declines of amphibians are particularly perplexing. To investigate the role of the major histocompatibility complex (MHC) in conferring pathogen resistance, we challenged Xenopus laevis tadpoles bearing different combinations of four MHC haplotypes (f, g, j, and r) with the bacterial pathogen Aeromonas hydrophila in two experiments. In the first, we exposed ff, fg, gg, gj, and jj tadpoles, obtained from breeding MHC homozygous parents, to one of three doses of A. hydrophila or heat-killed bacteria as a control. In the second, we exposed ff, fg, fr, gg, rg, and rr tadpoles, obtained from breeding MHC heterozygous parents and subsequently genotyped by PCR, to A. hydrophila, heat-killed bacteria or media alone as controls. We thereby determined whether the same patterns of MHC resistance emerged within as among families, independent of non-MHC heritable differences. Tadpoles with r or g MHC haplotypes were more likely to die than were those with f or j haplotypes. Growth rates varied among MHC types, independent of exposure dose. Heterozygous individuals with both susceptible and resistant haplotypes were intermediate to either homozygous genotype in both size and survival. The effect of the MHC on growth and survival was consistent between experiments and across families. MHC alleles differentially confer resistance to, or tolerance of, the bacterial pathogen, which affects tadpoles' growth and survival. |
| first_indexed | 2024-04-13T01:34:47Z |
| format | Article |
| id | doaj.art-db31edf643ac4f3895fb27d934ad12d3 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-13T01:34:47Z |
| publishDate | 2008-07-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-db31edf643ac4f3895fb27d934ad12d32022-12-22T03:08:25ZengPublic Library of Science (PLoS)PLoS ONE1932-62032008-07-0137e269210.1371/journal.pone.0002692Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians.Seth M BarribeauJandouwe VillingerBruce WaldmanGiven their well-developed systems of innate and adaptive immunity, global population declines of amphibians are particularly perplexing. To investigate the role of the major histocompatibility complex (MHC) in conferring pathogen resistance, we challenged Xenopus laevis tadpoles bearing different combinations of four MHC haplotypes (f, g, j, and r) with the bacterial pathogen Aeromonas hydrophila in two experiments. In the first, we exposed ff, fg, gg, gj, and jj tadpoles, obtained from breeding MHC homozygous parents, to one of three doses of A. hydrophila or heat-killed bacteria as a control. In the second, we exposed ff, fg, fr, gg, rg, and rr tadpoles, obtained from breeding MHC heterozygous parents and subsequently genotyped by PCR, to A. hydrophila, heat-killed bacteria or media alone as controls. We thereby determined whether the same patterns of MHC resistance emerged within as among families, independent of non-MHC heritable differences. Tadpoles with r or g MHC haplotypes were more likely to die than were those with f or j haplotypes. Growth rates varied among MHC types, independent of exposure dose. Heterozygous individuals with both susceptible and resistant haplotypes were intermediate to either homozygous genotype in both size and survival. The effect of the MHC on growth and survival was consistent between experiments and across families. MHC alleles differentially confer resistance to, or tolerance of, the bacterial pathogen, which affects tadpoles' growth and survival.http://europepmc.org/articles/PMC2443284?pdf=render |
| spellingShingle | Seth M Barribeau Jandouwe Villinger Bruce Waldman Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. PLoS ONE |
| title | Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. |
| title_full | Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. |
| title_fullStr | Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. |
| title_full_unstemmed | Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. |
| title_short | Major histocompatibility complex based resistance to a common bacterial pathogen of amphibians. |
| title_sort | major histocompatibility complex based resistance to a common bacterial pathogen of amphibians |
| url | http://europepmc.org/articles/PMC2443284?pdf=render |
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