Histopathological and immunohistochemical changes in the amniotic membrane of gestational diabetic mothers / Cambios histopatológicos e inmunohistoquímicos de la membrana amniótica de madres diabéticas gestacionales

The aim of this study is to examine the changes in the amniotic membrane diagnosed with gestational diabetes mellitus. In this study, as a control group human amnion membrane from normotensive pregnancies was collected from diabetic women at 28­35 weeks of gestation. Gestational diabetes (n= 6) and normal amnion membrane (n= 6) for a total of 12 units were received. Amniotic membrane thickness was measured (p<0.0001) and it was significantly higher in GDM groups compared to control group. The diameter of the amniotic epithelial cell nuclei was measured (p=0.0022). Gestational diabetes results show that there was weakening between amniotic epithelial cell-cell junction. This study showed that structural changes in epithelial cells of amniotic membrane were formed due to diabetes. The membrane thickness has led to structural changes in diameter and in diabetes group cause extracellular matrix to increase, thus leading to MMP-9 expression increase eventually disrupting matrix balance. In addition, with cd44 increase angiogenesis has been induced and thought to influence material pass between fetus and mother.

El objetivo de este estudio fue examinar los cambios en la membrana amniótica diagnosticada con diabetes mellitus gestacional (DMG). En este estudio, como grupo control, se recogió la membrana amniótica de embarazos normotensos de mujeres diabéticas a las 28 y 35 semanas de gestación. La muestra consistió en 6 casos con diabetes gestacional (n = 6) y 6 casos de membrana amniótica normal (n = 6), para un total de 12 casos. El espesor de la membrana amniótica se midió (p <0,0001) y fue significativamente mayor en los grupos de DMG en comparación con el grupo control. Se midió el diámetro de los núcleos de las células epiteliales amnióticas (p = 0,0022). Los resultados demostraron que en la DMG hubo debilitamiento entre la célula epitelial amniótica-célula de unión. Este estudio mostró que los cambios estructurales en las células epiteliales de la membrana amniótica se presentaron debido a la DMG. El espesor de la membrana ha dado lugar a cambios estructurales en el diámetro y en el grupo de DMG debido a un aumento de la matriz extracelular, lo que condujo al aumento de la expresión de MMP-9, eventualmente interrumpiendo el equilibrio de la matriz. Además, el aumento de cd44 indujo la angiogénesis y se cree que también influye en el material que se comparte entre el feto y la madre.

A Study on Morphological and Immunohistochemical Changes of the Myometrium in the Pregnant and Postpartum Rat / 대한해부학회지

This experiment was performed to investigate morphological and immunohistochemical changes of the connective tissue, the nerve and the smooth muscle cell in the pregnant and postpartum rat myometrium. The materials were the non-pregnant control, the 2-, the 4-, the 10-day gestation and the 1-, the 2-, the 6-day birth of rat myometrium. The light microscopic findings were examed after van Gieson and malachite green stainings. The reaction of nitric oxide synthase activity, apoptosis, type IV collagen, and estrogen receptor were examined immunochemically. The results were as follows: A. Light microscopic findings: 1. In the van Gieson staining for collagen fibers and smooth muscles, it showed the increase of pinky collagen fibers and yellow smooth muscle cells from the 2-day gestation. At the 1-day birth, the yellow hypertrophic smooth muscle cells were in the form of the papilla. The collagen fibers of the 2-day birth were more abundant than that of the 1-day birth. 2. In the malachite green staining for nerve fibers, it showed the blue spots. The size of spots of the 4-day gestation enlarged and at the 10-day gestation the number of fine spots was increased. At the 1-day birth, it showed the decreased number and increased size of spots. B. Immunohistochemical findings : 1. The NOS activity showed the increased positive reaction at the 2-day gestation. At the 10-day gestation, the outer zone of myometrium showed prominent positive. At the 1-day birth, the endothelium of the vessels were weakly positive. 2. The apoptotic reaction was localized at the connective tissue cells between the outer and inner zones of myometrium. The positive reaction cells were a few at the 1-day birth, several at the 2-day birth, and many at the 6-day birth. 3. The type IV collagen reaction appeared at the perivascualr area and the comnnective tissues of the inner zone. The positive reaction showed weak at the control, moderate at the 2-day gestation, and strong at the 4-day gestation. At the 1- and 2-day birth, the connective tissue of inner zone was moderately positive. 4. The estrogen receptor reaction cells appeared at the papillary outer zone of the 10-day gestation. The reaction cells were several at the 1-day birth and a few at the 2-day birth. C. Electron microscopic findings : 1. At the 10-day gestation, one group of smooth muscle cells had well-developed sarcoplasmic reticulum and the other group with abundant mitochondria appeared. At the 2-day birth, one group smooth muscle cells had degenerating processes and the other group with the serrated processes showed. At the 6-day birth, smooth muscle cells were degenerated. 2. Mitochondria were abundant in the smooth muscle cell with many processes of the 10-day gestation. The onset of mitochondrial degeneration began at the 2-day birth. The mean section of mitochondria was increased by the 2-day birth and markedly decreased at the 6-day birth. 3. At the 1-day and 2-day birth, the electron-dense region of cell membrane was increased and submembranous caveolae were decreased. The mean section of caveolae was the mostly decreased at the 10-day gestation, nearly restored at the 1-day birth and enlarged at the 6-day birth.