Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis)
There are few reports describing the structure and function of the whale placenta with the advance of pregnancy. In this study, therefore, the placenta and nonpregnant uterus of the Antarctic minke whale were observed morphologically and immunohistochemically. Placentas and nonpregnant uteri were co...
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ftpubmed:oai:pubmedcentral.nih.gov:3934202 2023-05-15T13:49:39+02:00 Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) SASAKI, Motoki AMANO, Yoko HAYAKAWA, Daisuke TSUBOTA, Toshio ISHIKAWA, Hajime MOGOE, Toshihiro OHSUMI, Seiji TETSUKA, Masafumi MIYAMOTO, Akio FUKUI, Yutaka BUDIPITOJO, Teguh KITAMURA, Nobuo 2012-12-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934202 http://www.ncbi.nlm.nih.gov/pubmed/23269486 https://doi.org/10.1262/jrd.2012-132 en eng The Society for Reproduction and Development http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934202 http://www.ncbi.nlm.nih.gov/pubmed/23269486 http://dx.doi.org/10.1262/jrd.2012-132 ©2013 Society for Reproduction and Development http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. CC-BY-NC-ND Original Article Text 2012 ftpubmed https://doi.org/10.1262/jrd.2012-132 2014-03-09T01:39:57Z There are few reports describing the structure and function of the whale placenta with the advance of pregnancy. In this study, therefore, the placenta and nonpregnant uterus of the Antarctic minke whale were observed morphologically and immunohistochemically. Placentas and nonpregnant uteri were collected from the 15th, 16th and 18th Japanese Whale Research Programme with Special Permit in the Antarctic (JARPA) and 1st JARPA II organized by the Institute of Cetacean Research in Tokyo, Japan. In the macro- and microscopic observations, the placenta of the Antarctic minke whale was a diffuse and epitheliochorial placenta. The chorion was interdigitated to the endometrium by primary, secondary and tertiary villi, which contained no specialized trophoblast cells such as binucleate cells, and the interdigitation became complicated with the progress of gestation. Furthermore, fetal and maternal blood vessels indented deeply into the trophoblast cells and endometrial epithelium respectively with fetal growth. The minke whale placenta showed a fold-like shape as opposed to a finger-like shape. In both nonpregnant and pregnant uteri, many uterine glands were distributed. The uterine glands in the superficial layer of the pregnant endometrium had a wide lumen and large epithelial cells as compared with those in the deep layer. On the other hand, in the nonpregnant endometrium, the uterine glands had a narrower lumen and smaller epithelial cells than in the pregnant endometrium. In immunohistochemical detection, immunoreactivity for P450scc was detected in most trophoblast cells, but not in nonpregnant uteri, suggesting that trophoblast epithelial cells synthesized and secreted the sex steroid hormones and/or their precursors to maintain the pregnancy in the Antarctic minke whale. Text Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis minke whale PubMed Central (PMC) Antarctic The Antarctic Journal of Reproduction and Development 59 2 159 167 |
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Original Article SASAKI, Motoki AMANO, Yoko HAYAKAWA, Daisuke TSUBOTA, Toshio ISHIKAWA, Hajime MOGOE, Toshihiro OHSUMI, Seiji TETSUKA, Masafumi MIYAMOTO, Akio FUKUI, Yutaka BUDIPITOJO, Teguh KITAMURA, Nobuo Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
topic_facet |
Original Article |
description |
There are few reports describing the structure and function of the whale placenta with the advance of pregnancy. In this study, therefore, the placenta and nonpregnant uterus of the Antarctic minke whale were observed morphologically and immunohistochemically. Placentas and nonpregnant uteri were collected from the 15th, 16th and 18th Japanese Whale Research Programme with Special Permit in the Antarctic (JARPA) and 1st JARPA II organized by the Institute of Cetacean Research in Tokyo, Japan. In the macro- and microscopic observations, the placenta of the Antarctic minke whale was a diffuse and epitheliochorial placenta. The chorion was interdigitated to the endometrium by primary, secondary and tertiary villi, which contained no specialized trophoblast cells such as binucleate cells, and the interdigitation became complicated with the progress of gestation. Furthermore, fetal and maternal blood vessels indented deeply into the trophoblast cells and endometrial epithelium respectively with fetal growth. The minke whale placenta showed a fold-like shape as opposed to a finger-like shape. In both nonpregnant and pregnant uteri, many uterine glands were distributed. The uterine glands in the superficial layer of the pregnant endometrium had a wide lumen and large epithelial cells as compared with those in the deep layer. On the other hand, in the nonpregnant endometrium, the uterine glands had a narrower lumen and smaller epithelial cells than in the pregnant endometrium. In immunohistochemical detection, immunoreactivity for P450scc was detected in most trophoblast cells, but not in nonpregnant uteri, suggesting that trophoblast epithelial cells synthesized and secreted the sex steroid hormones and/or their precursors to maintain the pregnancy in the Antarctic minke whale. |
format |
Text |
author |
SASAKI, Motoki AMANO, Yoko HAYAKAWA, Daisuke TSUBOTA, Toshio ISHIKAWA, Hajime MOGOE, Toshihiro OHSUMI, Seiji TETSUKA, Masafumi MIYAMOTO, Akio FUKUI, Yutaka BUDIPITOJO, Teguh KITAMURA, Nobuo |
author_facet |
SASAKI, Motoki AMANO, Yoko HAYAKAWA, Daisuke TSUBOTA, Toshio ISHIKAWA, Hajime MOGOE, Toshihiro OHSUMI, Seiji TETSUKA, Masafumi MIYAMOTO, Akio FUKUI, Yutaka BUDIPITOJO, Teguh KITAMURA, Nobuo |
author_sort |
SASAKI, Motoki |
title |
Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
title_short |
Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
title_full |
Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
title_fullStr |
Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
title_full_unstemmed |
Structure and Steroidogenesis of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis) |
title_sort |
structure and steroidogenesis of the placenta in the antarctic minke whale (balaenoptera bonaerensis) |
publisher |
The Society for Reproduction and Development |
publishDate |
2012 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934202 http://www.ncbi.nlm.nih.gov/pubmed/23269486 https://doi.org/10.1262/jrd.2012-132 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis minke whale |
genre_facet |
Antarc* Antarctic Antarctic Minke whale Balaenoptera bonaerensis minke whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934202 http://www.ncbi.nlm.nih.gov/pubmed/23269486 http://dx.doi.org/10.1262/jrd.2012-132 |
op_rights |
©2013 Society for Reproduction and Development http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1262/jrd.2012-132 |
container_title |
Journal of Reproduction and Development |
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59 |
container_issue |
2 |
container_start_page |
159 |
op_container_end_page |
167 |
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1766251910088622080 |