Recovery of the pubic symphysis on primiparous young and multiparous senescent mice at postpartum

It has been observed that parturition has a significant effect on female skeletal architecture and that age alters musculoskeletal tissues and their functions. We therefore hypothesized that multiparity affects the recovery of the pubic symphysis in senescent mice at postpartum and the morphology of...

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Bibliographic Details
Published in:	Histology and histopathology Vol. 27; no. 7; pp. 885 - 896
Main Authors:	Consonni, Silvio Roberto, Rosa, Renata Giardini, Nascimento, Maria Amália Cavinato, Vinagre, Cristiane Mendes, Toledo, Olga Maria Szymanski, Joazeiro, Paulo Pinto
Format:	Journal Article
Language:	English
Published:	Spain 01-07-2012
Subjects:	Aging Animals Connective Tissue - pathology Extracellular Matrix - pathology Female Immunohistochemistry Mice Microscopy, Electron, Transmission Parity Postpartum Period Pregnancy Pregnancy, Animal Pubic Symphysis - pathology
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Summary:	It has been observed that parturition has a significant effect on female skeletal architecture and that age alters musculoskeletal tissues and their functions. We therefore hypothesized that multiparity affects the recovery of the pubic symphysis in senescent mice at postpartum and the morphology of the interpubic tissues. The pubic symphysis of primiparous young, virgin senescent (VS) and multiparous senescent (MS) Swiss mice was examined by light microscopy, transmission electron microscopy, morphometric analysis and immunohistochemistry. The mouse pubic symphysis was remodeled during the first pregnancy: the cellular phenotype and morphology changed to ensure a structurally safe birth canal, followed by recovery of the interpubic articulation after birth. The morphology of the pubic symphysis in the VS group was maintained in a state similar to that observed in virgin young mice. In contrast, MS mice exhibited an interpubic ligament characterized by extended fibrocyte-like cells, an opened interpubic articulation gap, compacted and thin collagen fibrils and scarce galectin-3-positive cells. Thus, we found that the cellular and extracellular characteristics of the pubic symphysis were altered by multiparity in senescent mice. These particular tissue characteristics of the MS group might be associated with an impaired recovery process at postpartum. Thus, a better understanding of the alterations that occur in the birth canal, including the pubic symphysis, due to multiparity in reproductively aged mice may contribute to our comprehension of the biological mechanisms that modify the skeleton and pelvic ligaments and even play a role in the murine model of pelvic organ prolapse.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1699-5848
DOI:	10.14670/HH-27.885