scholarly journals Glucose, Insulin, and Oxygen Interplay in Placental Hypervascularisation in Diabetes Mellitus

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Silvija Cvitic ◽  
Gernot Desoye ◽  
Ursula Hiden

The placental vasculature rapidly expands during the course of pregnancy in order to sustain the growing needs of the fetus. Angiogenesis and vascular growth are stimulated and regulated by a variety of growth factors expressed in the placenta or present in the fetal circulation. Like in tumors, hypoxia is a major regulator of angiogenesis because of its ability to stimulate expression of various proangiogenic factors. Chronic fetal hypoxia is often found in pregnancies complicated by maternal diabetes as a result of fetal hyperglycaemia and hyperinsulinemia. Both are associated with altered levels of hormones, growth factors, and proinflammatory cytokines, which may act in a proangiogenic manner and, hence, affect placental angiogenesis and vascular development. Indeed, the placenta in diabetes is characterized by hypervascularisation, demonstrating high placental plasticity in response to diabetic metabolic derangements. This review describes the major regulators of placental angiogenesis and how the diabetic environmentin uteroalters their expression. In the light of hypervascularized diabetic placenta, the focus was placed on proangiogenic factors.

2016 ◽  
Vol 16 (3) ◽  
pp. 16
Author(s):  
L. B. Ermakova ◽  
M. A. Chechneva ◽  
S. N. Lysenko ◽  
V. A. Petrukhin ◽  
F. F. Burumkulova

Biomedicine ◽  
2021 ◽  
Vol 41 (4) ◽  
pp. 694-700
Author(s):  
Anil Kumar K. V. ◽  
Kavitha S. ◽  
Sreekanth K. S.

The vasculature of the placenta plays a crucial role during the course of pregnancy in order to maintain the growing need of the fetus. Abnormal placental structure and function significantly increase the risk of stillbirth. Various growth factors and cytokines play an important role in the vasculogenesis and angiogenesis of placenta. These processes are stimulated by various pro-angiogenic factors. The activities of these factors are also stimulated by hypoxia. In some of the physiological phenomenon like ovulation, embryogenesis as well as in wound healing intense blood vessel growth can be seen similar to that seen in placenta. Therefore, factors that induce and maintain placental vascular growth and function are of considerable developmental and clinical significance. The total arterial architecture may also depend upon the pro-angiogenic factors. Hormones and other growth factors are other contributors of this vasculogenesis and angiogenesis. Any dysfunction of factors can lead to foetal hypoxia and related complications. This review describes the major growth factors and their significant role in vasculogenesis and angiogenesis of placenta.


2021 ◽  
Vol 224 (2) ◽  
pp. S188-S189
Author(s):  
Stacey Gold ◽  
Catherine Lopez ◽  
Jessica L. Quistorff ◽  
Sarah Downs ◽  
Sara Iqbal ◽  
...  

Author(s):  
George Lister

Persistent pulmonary hypertension of the newborn or persistent fetal circulation is a clinical syndrome that is usually apparent within the first 2 days after birth because of the presence of hypoxemia (2;12;19). The syndrome was first described in an abstract by Gersony, Due, and Sinclair (6) in 1969. Two infants were reported who had “RV decompensation, cyanosis and clear lung fields… in the absence of recognizable cardiac, pulmonary, hematologic or CNS disease.” The syndrome has been associated with aspiration of meconium, diaphragmatic hernia, asphyxia, hemorrhage, shock, and maternal infection (4;18). In other cases, there is no clear antecedent event. Despite considerable interest in the problem and a wealth of research related to pulmonary vasoregulation and vascular development in the fetus and newborn, the etiology of the syndrome remains obscure 20 years since its recognition.


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