Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡
Eggs of teleost fish, unlike those of many other animals, allow sperm entry only at a single site, a narrow canal in the egg's chorion called the micropyle. In some fish (e.g., flounder, herring, and Alaska pollock), the micropyle is a narrow channel in the chorion, with or without a shallow de...
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ftbioone:10.1093/biolre/iox015 2024-06-02T07:54:26+00:00 Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr world 2017-03-24 text/HTML https://doi.org/10.1093/biolre/iox015 en eng Society for the Study of Reproduction doi:10.1093/biolre/iox015 All rights reserved. https://doi.org/10.1093/biolre/iox015 Text 2017 ftbioone https://doi.org/10.1093/biolre/iox015 2024-05-07T00:52:31Z Eggs of teleost fish, unlike those of many other animals, allow sperm entry only at a single site, a narrow canal in the egg's chorion called the micropyle. In some fish (e.g., flounder, herring, and Alaska pollock), the micropyle is a narrow channel in the chorion, with or without a shallow depression around the outer opening of micropyle. In some other fish (e.g., salmon, pufferfish, cod, and medaka), the micropyle is like a funnel with a conical opening. Eggs of all the above fish have a glycoprotein tightly bound to the chorion surface around the micropyle. This glycoprotein directs spermatozoa into the micropylar canal in a Ca2+-dependent manner. This substance, called the micropylar sperm attractant or MISA, increases fertilization efficiency and is essential in herring. In flounder, salmon, and perhaps medaka, fertilization is possible without MISA, but its absence makes fertilization inefficient because most spermatozoa swim over the micropyle without entering it. The mechanism underlying sperm-MISA interactions is yet to be determined, but at least in herring the involvement of Ca2+ and K+ channel proteins, as well as CatSper and adenylyl cyclase, is very likely. In some other fish (e.g., zebrafish, loach, and goldfish), the chorion around the micropyle is deeply indented (e.g., zebrafish and loach) or it has radially or spirally arranged grooves around the outer opening of the micropyle (e.g., goldfish). MISA is absent from the eggs of these fish and sperm entry into micropylar canal seems to be purely physical. Text alaska pollock Alaska BioOne Online Journals Biology of Reproduction 96 4 780 799 |
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BioOne Online Journals |
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ftbioone |
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English |
description |
Eggs of teleost fish, unlike those of many other animals, allow sperm entry only at a single site, a narrow canal in the egg's chorion called the micropyle. In some fish (e.g., flounder, herring, and Alaska pollock), the micropyle is a narrow channel in the chorion, with or without a shallow depression around the outer opening of micropyle. In some other fish (e.g., salmon, pufferfish, cod, and medaka), the micropyle is like a funnel with a conical opening. Eggs of all the above fish have a glycoprotein tightly bound to the chorion surface around the micropyle. This glycoprotein directs spermatozoa into the micropylar canal in a Ca2+-dependent manner. This substance, called the micropylar sperm attractant or MISA, increases fertilization efficiency and is essential in herring. In flounder, salmon, and perhaps medaka, fertilization is possible without MISA, but its absence makes fertilization inefficient because most spermatozoa swim over the micropyle without entering it. The mechanism underlying sperm-MISA interactions is yet to be determined, but at least in herring the involvement of Ca2+ and K+ channel proteins, as well as CatSper and adenylyl cyclase, is very likely. In some other fish (e.g., zebrafish, loach, and goldfish), the chorion around the micropyle is deeply indented (e.g., zebrafish and loach) or it has radially or spirally arranged grooves around the outer opening of the micropyle (e.g., goldfish). MISA is absent from the eggs of these fish and sperm entry into micropylar canal seems to be purely physical. |
author2 |
Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr |
format |
Text |
author |
Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr |
spellingShingle |
Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
author_facet |
Ryuzo Yanagimachi Tatsuo Harumi Hajime Matsubara Wei Yan Shuiqiao Yuan Noritaka Hirohashi Tomohiro Iida Etsuro Yamaha Katsutoshi Arai Takahiro Matsubara Tadashi Andoh Carol Vines Gary N. Cherr |
author_sort |
Ryuzo Yanagimachi |
title |
Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
title_short |
Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
title_full |
Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
title_fullStr |
Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
title_full_unstemmed |
Chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
title_sort |
chemical and physical guidance of fish spermatozoa into the egg through the micropyle†,‡ |
publisher |
Society for the Study of Reproduction |
publishDate |
2017 |
url |
https://doi.org/10.1093/biolre/iox015 |
op_coverage |
world |
genre |
alaska pollock Alaska |
genre_facet |
alaska pollock Alaska |
op_source |
https://doi.org/10.1093/biolre/iox015 |
op_relation |
doi:10.1093/biolre/iox015 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1093/biolre/iox015 |
container_title |
Biology of Reproduction |
container_volume |
96 |
container_issue |
4 |
container_start_page |
780 |
op_container_end_page |
799 |
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1800737624417107968 |