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

Autor(es)

Consonni, Silvio Roberto ^[1] ; Rosa, Renata Giardini ^[1] ; Cavinato Nascimento, Maria Amalia ^[1] ; Vinagre, Cristiane Mendes ^[2] ; Szymanski Toledo, Olga Maria ^[3] ; Joazeiro, Paulo Pinto ^[1]

Afiliação do(s) autor(es)

^[1] State Univ Campinas UNICAMP, Dept Histol & Embryol, Campinas, SP - Brazil

^[2] State Univ Campinas Unicamp, Lab Anim Sci, Multidisciplinary Ctr Biol Invest, Campinas, SP - Brazil

^[3] Fac Med ABC, Dept Morphol, Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: HISTOLOGY AND HISTOPATHOLOGY; v. 27, n. 7, p. 885-896, JUL 2012.
• Citações Web of Science: 3

Resumo

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. (AU)

• Processo FAPESP: 07/50823-2 - Estudo de características morfológicas e imunohistoquímicas de galectina-3 na sínfise púbica de camundongos fêmeas Swiss multíparas empregadas como matriz reprodutiva
• Beneficiário: Sílvio Roberto Consonni
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica