In individuals who have had Roux-en-Y gastric bypass surgery and have liver metastases, eating a low-carbohydrate diet is linked to fewer episodes of low blood sugar, while delaying the use of...
Mechanism
Synthesis from 1 study
After stomach surgery, food rushes into the intestine and causes the pancreas to dump too much insulin, which pulls sugar out of the blood too fast. Cancer in the liver makes it harder for the body to release stored sugar to fix the drop. Eating fewer carbs and taking a medicine that slows carb...
Most probable mechanism
After stomach surgery, food moves too quickly into the small intestine, causing a sudden spike in blood sugar. This tricks the pancreas into releasing too much insulin, which pulls sugar out of the blood too fast. At the same time, cancer in the liver makes it harder for the body to release stored sugar when blood sugar drops, so low blood sugar lasts longer and happens more often. Eating fewer carbs slows the sugar spike, and a certain medicine slows carb digestion, both helping to prevent the insulin surge and keep blood sugar stable.
Roux-en-Y gastric bypass alters gastrointestinal anatomy, causing rapid delivery of ingested carbohydrates to the proximal small intestine.
Rapid glucose absorption stimulates L-cells to secrete GLP-1 and GIP, leading to exaggerated incretin effect.
Excessive incretin signaling overstimulates pancreatic beta cells, causing disproportionate insulin secretion.
Excess insulin drives glucose into peripheral tissues and suppresses hepatic gluconeogenesis and glycogenolysis.
Liver metastases impair hepatic glycogen storage and glucose production capacity, reducing counterregulatory response to hypoglycemia.
Delayed acarbose administration or high-carbohydrate intake overwhelms impaired counterregulation, triggering symptomatic hypoglycemia.
Evidence from Studies
Supporting (1)
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