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首页> 外文期刊>Zoological Science >Microvascularization on Collared Peccary Placenta: a Microvascular Cast Atudy in Late Pregnancy
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Microvascularization on Collared Peccary Placenta: a Microvascular Cast Atudy in Late Pregnancy

机译：领状胎盘微血管化：晚期妊娠的微血管铸成。

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The microvascularization of the collared peccary (Tayassu tajacu) placenta was studied by vascular casts and immunolocalization of alpha-smooth muscle actin and vimentin, to identify the three-dimensional organization and vascular flow interrelation in the microvasculature between the maternal and fetal compartments of the placentae. The immunolocalization of vimentin in the vascular endothelium and in the smooth muscle cells of blood vessels showed indented capillaries along the uterine epithelium and the trophoblast at the sides of complementary maternal and fetal microfolds, or rugae. This confers the three-dimensional structure observed in vascular casts. On the maternal side, casts demonstrated uterine folds coated by with primary and secondary ridges, and by areolae dispersed between these ridges. The arteriole runs through the center/middle of ridges, branching at the top into a microvascular network wall in a basket-like fashion. At the base of these baskets venules were formed. On the fetal side, arterioles branched centrally in the fetal rugae into a capillary network in a bulbous form, complementary to the opposite maternal depressions forming the baskets. At the base of the bulbous protrusions, the fetal venules arise. The blood vessel orientation in the materno-fetal interface of the placentae of collared peccaries suggests a blood flow pattern of the type countercurrent to crosscurrent. The same pattern has been reported in domestic swine demonstrating that, even after 38 million years, the Tayassuidae and Suidae families exhibit similar placental morphology, which is here characterized at the microvascular level.
机译：通过血管铸型和α-平滑肌肌动蛋白和波形蛋白的免疫定位研究了衣领颊部（Tayassu tajacu）胎盘的微血管化，以鉴定胎盘母体和胎儿腔室之间微血管中的三维组织和血管流动相关性。波形蛋白在血管内皮和血管平滑肌细胞中的免疫定位显示沿子宫上皮的凹陷的毛细血管和滋养母细胞在母体和胎儿微折叠或皱褶的侧面。这赋予了在血管模型中观察到的三维结构。在产妇方面，铸模显示子宫褶皱被初级和次级以及散布在这些之间的乳晕所覆盖。小动脉穿过脊的中央/中间，在顶部以篮状的方式分支成微血管网络壁。在这些篮子的底部形成了小静脉。在胎儿侧，小动脉在胎毛的中央分支成球状的毛细血管网，与形成篮的相对的产妇凹陷互补。在球状突起的底部，出现胎儿的小静脉。领兽的胎盘胎盘的胎-胎界面中的血管取向表明血流类型与逆流逆流。在家养猪中也报道了相同的模式，这表明即使在3800万年后，Tayassuidae和Suidae家族也表现出相似的胎盘形态，此处以微血管水平为特征。

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