Exposure to certain plastic chemicals during early pregnancy is linked to a measurable rise in blood sugar levels during a standard glucose test.
Mechanism
Synthesis from 1 study
Plastic chemicals during pregnancy cause fat and liver cells to become resistant to insulin and change how they store fat, making it harder for the body to remove sugar from the blood. This leads to higher blood sugar levels when sugar is introduced. Another chemical in plastics can do the opposite...
Most probable mechanism
Chemicals from certain plastics enter the body during pregnancy and trigger inflammation in fat and liver tissue, which blocks the body’s ability to respond to insulin. At the same time, these chemicals change how fat cells develop and store fat, making it harder for the body to absorb sugar from the blood. As a result, when sugar is introduced, it stays in the bloodstream longer than it should.
Metabolites of high molecular weight phthalates activate pro-inflammatory signaling pathways in adipose and hepatic tissues, increasing production of tumor necrosis factor-alpha.
Elevated tumor necrosis factor-alpha disrupts insulin receptor substrate signaling and inhibits translocation of glucose transporter type 4 to the cell membrane.
Phthalate metabolites bind to and selectively activate peroxisome proliferator-activated receptor gamma in adipose tissue, altering expression of genes involved in lipid storage and insulin sensitivity.
Dysregulated adipogenesis and impaired insulin signaling reduce cellular glucose uptake, leading to elevated systemic glucose levels during a glucose challenge.
Less supported by current evidence, but not ruled out
Another chemical found in plastics binds to receptors on insulin-producing cells, causing them to release more insulin and reduce glucagon, which lowers blood sugar — this opposes the glucose-elevating effect of phthalates.
Bisphenol A binds to membrane-associated estrogen receptors on pancreatic beta-cells, triggering rapid intracellular signaling that enhances insulin granule release.
Simultaneously, bisphenol A impairs calcium signaling in pancreatic alpha-cells, reducing glucagon secretion.
Increased insulin and decreased glucagon lower circulating glucose levels during a glucose challenge.
Evidence from Studies
Supporting (1)
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Contradicting (0)
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