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Mechanisms of Fetal Overgrowth in Gestational Diabetes: The Potential Role of SOCS2
Luisa Hernández-Baraza1, Yeray Brito-Casillas1, Carmen Valverde-Tercedor1
1Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain.
During pregnancy, the maternal body adapts in several ways to create an optimal environment for embryonic growth. These changes include endocrine and metabolic shifts that can lead to insulin resistance and gestational diabetes mellitus (GDM), impacting both the mother and fetus in the short and long term. Fetal macrosomia, a condition where the fetus is significantly larger than average, is a primary concern associated with GDM. Although the underlying mechanism remains unclear, a pregnancy-induced proinflammatory state, combined with altered glucose homeostasis, plays a critical role. Several cytokines and hormones, such as interleukin 6 (IL-6), insulin growth factor 1 (IGF-1), prolactin (PRL), or progesterone, are essential for fetal growth, the control of the inflammatory response, and the regulation of lipid and carbohydrate metabolism to meet energy demands during pregnancy. However, although the role of these cytokines in metabolism and body growth during adulthood has been extensively studied, their implication in the pathophysiology of GDM and macrosomia is not well understood. Here, we review this pathophysiology and pose the hypothesis that an aberrant response to cytokine receptor activation, particularly involving the suppressor of cytokine signaling 2 (SOCS2), contributes to GDM and fetal macrosomia. This novel perspective suggests an unexplored mechanism by which SOCS2 dysregulation could impact pregnancy outcomes.
During pregnancy, the maternal body adapts in several ways to create an optimal environment for embryonic growth. These changes include endocrine and metabolic shifts that can lead to insulin resistance and gestational diabetes mellitus (GDM), impacting both the mother and fetus in the short and long term. Fetal macrosomia, a condition where the fetus is significantly larger than average, is a primary concern associated with GDM. Although the underlying mechanism remains unclear, a pregnancy-induced proinflammatory state, combined with altered glucose homeostasis, plays a critical role. Several cytokines and hormones, such as interleukin 6 (IL-6), insulin growth factor 1 (IGF-1), prolactin (PRL), or progesterone, are essential for fetal growth, the control of the inflammatory response, and the regulation of lipid and carbohydrate metabolism to meet energy demands during pregnancy. However, although the role of these cytokines in metabolism and body growth during adulthood has been extensively studied, their implication in the pathophysiology of GDM and macrosomia is not well understood. Here, we review this pathophysiology and pose the hypothesis that an aberrant response to cytokine receptor activation, particularly involving the suppressor of cytokine signaling 2 (SOCS2), contributes to GDM and fetal macrosomia. This novel perspective suggests an unexplored mechanism by which SOCS2 dysregulation could impact pregnancy outcomes.
Frequently Asked Questions
According to the study's authors, an aberrant response to cytokine receptor activation, specifically involving the Suppressor of Cytokine Signaling 2 (SOCS2), disrupts metabolic homeostasis. This signaling failure alters the regulation of lipids and carbohydrates, potentially leading to the excessive fetal growth observed in macrosomia.
The researchers propose that the Suppressor of Cytokine Signaling 2 (SOCS2) protein is a central mediator. Dysregulation of this specific regulator may impair the maternal body's ability to control inflammatory responses and glucose levels, which are essential for maintaining normal fetal development during pregnancy.
The study examined Interleukin 6 (IL-6) and Prolactin (PRL) because these molecules are essential for controlling inflammatory responses and meeting energy demands. By analyzing their signaling pathways, the authors identified how an aberrant response to these cytokines contributes to the pathophysiology of gestational diabetes.
The findings are specifically confined to the context of Gestational Diabetes Mellitus (GDM) and the resulting fetal macrosomia. The authors flag the aberrant response to cytokine receptor activation as a novel perspective for these conditions, rather than general pregnancy-related metabolic changes or adult obesity.
The study's authors propose that exploring the unexplored mechanism of SOCS2 dysregulation could lead to new clinical insights. They state that understanding this molecular pathway is necessary to develop targeted interventions that address the underlying causes of fetal overgrowth in diabetic pregnancies.
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