| Lymphatics in the human endometrium disappear during decidualization. | |
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MedLine Citation:
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PMID: 20729537 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: The mammalian placenta plays a central role in maternal tolerance of the semi-allogeneic fetus and fluid balance between the maternal and fetal compartments. The lymphatics play a role in both these function. The aim of this study was to describe the distribution of lymphatic vessels in human decidua, with particular focus on the lymphatics that surround remodelling spiral arteries during decidualization and trophoblast invasion. METHODS: Placental bed and non-placental bed (decidua parietalis) biopsies were obtained from 41 women undergoing elective termination of pregnancy at 6-18 weeks gestational age as well as placental bed biopsies from 5 women undergoing elective Caesarean section at term. In addition to routine haematoxylin and eosin staining, double immunohistochemical labelling was performed on serial 3-µm sections to identify lymphatic vessels in conjunction with one of the following: blood vessels, smooth muscle, epithelial and trophoblast cells or proliferating cells. Representative photomicrographs of all sections were obtained from a total of 273 areas (46 samples, average 6 range 3-15 areas per sample). Descriptive findings of the organization of lymphatics in human placental bed and decidua parietalis were made from a total of 1638 images. RESULTS: Lymphatic vessels positive for podoplanin were abundant in non-decidualized hypersecretory endometrium at all stages of gestation. By contrast, the decidua was nearly always devoid of lymphatics. In some samples, structures that appeared to be regressing lymphatics could be observed at the boundary between non-decidualized hypersecretory and decidualized endometrium. Lymphatic vessels were notably absent from the vicinity of spiral arteries that were surrounded by decidualized stromal cells. Lymphatic vessels in non-decidualized hypersecretory endometrium appeared larger and more elongated as gestation progressed. Proliferating lymphatic vascular endothelial cells were identified in both large vessels, and in streaks of D2-40 positive cells that could have been newly forming lymphatic vessels. Placental bed lymphatics exhibited limited and variable staining with LYVE-1 at all stages of pregnancy apart from term. CONCLUSIONS: We have made novel observations on lymphatics in the placental bed and their relationship with other structures throughout pregnancy. Endometrial stromal cell decidualization results in a loss of lymphatics, with this phenomenon being particularly apparent around the spiral arteries. |
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Authors:
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Mila Volchek; Jane E Girling; Gendie E Lash; Leonie Cann; Beena Kumar; Stephen C Robson; Judith N Bulmer; Peter A W Rogers |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-08-21 |
Journal Detail:
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Title: Human reproduction (Oxford, England) Volume: 25 ISSN: 1460-2350 ISO Abbreviation: Hum. Reprod. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-16 Completed Date: 2011-01-10 Revised Date: 2012-03-02 |
Medline Journal Info:
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Nlm Unique ID: 8701199 Medline TA: Hum Reprod Country: England |
Other Details:
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Languages: eng Pagination: 2455-64 Citation Subset: IM |
Affiliation:
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Department of Obstetrics and Gynaecology, Monash Institute of Medical Research, Monash University, Centre for Women's Health Research, 246 Clayton Rd, Clayton, Victoria 3168, Australia. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Decidua
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pathology* Embryo Implantation* Endometrium / pathology* Female Humans Lymphatic Vessels / pathology* Membrane Glycoproteins / metabolism Pregnancy Trophoblasts / pathology* Vesicular Transport Proteins / metabolism |
| Grant Support | |
ID/Acronym/Agency:
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S19967//Biotechnology and Biological Sciences Research Council |
| Chemical | |
Reg. No./Substance:
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0/LYVE1 protein, human; 0/Membrane Glycoproteins; 0/PDPN protein, human; 0/Vesicular Transport Proteins |
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