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<p>Pasireotide frequently causes severe hyperglycemia; however, its detailed mechanism remains unknown. There are no published guidelines regarding the optimal management of pasireotide-induced hyperglycemia based on its pathophysiology. Herein, we successfully switched a patient with acromegaly from a dipeptidyl peptidase-4 (DPP-4) inhibitor to a glucagon-like peptide-1 (GLP-1) analog due to pasireotide-induced deterioration of glycemic control, and we examined the underlying mechanism for glycemic control. An in vitro study was conducted using pancreatic β-cell line, MIN-6, stably expressing GLP-1R (GLP-1R-MIN-6 cells) and intestinal L-cell line, GLUTag. High glucose levels and Gs-coupled receptor stimulation synergistically triggered insulin and GLP-1 secretion. Gs-coupled receptor stimulation primarily triggered GLP-1 secretion, which was amplified by high glucose levels in GLUTag cells. Pasireotide drastically inhibited GLP-1 secretion induced by Gs-coupled receptor stimulation through SSTR5-Gi-dependent inhibition of cAMP levels, suggesting that the main pathway was completely blocked. Furthermore, administering GLP-1 partially overcame the inhibitory effect of pasireotide in GLP-1R-MIN-6 cells, leading to a partial recovery of insulin secretion. The drastic inhibition of GLP-1 secretion via shutdown of the main pathway is the primary cause of pasireotide-induced hyperglycemia. GLP-1 analogs, rather than DPP-4 inhibitors, can spare pasireotide-induced depletion of endogenous GLP-1 and restore insulin secretion.</p>

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Insights into GLP-1 and insulin secretion mechanisms in pasireotide-induced hyperglycemia highlight effectiveness of Gs-targeting diabetes treatment

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月19日

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  • Junichiro SATO,
  • Katsunori MANAKA,
  • Hirofumi HORIKOSHI,
  • Maho TAGUCHI,
  • Kazuki HARADA,
  • Takashi TSUBOI,
  • Masaomi NANGAKU,
  • Taroh IIRI,
  • Noriko MAKITA

摘要

Pasireotide frequently causes severe hyperglycemia; however, its detailed mechanism remains unknown. There are no published guidelines regarding the optimal management of pasireotide-induced hyperglycemia based on its pathophysiology. Herein, we successfully switched a patient with acromegaly from a dipeptidyl peptidase-4 (DPP-4) inhibitor to a glucagon-like peptide-1 (GLP-1) analog due to pasireotide-induced deterioration of glycemic control, and we examined the underlying mechanism for glycemic control. An in vitro study was conducted using pancreatic β-cell line, MIN-6, stably expressing GLP-1R (GLP-1R-MIN-6 cells) and intestinal L-cell line, GLUTag. High glucose levels and Gs-coupled receptor stimulation synergistically triggered insulin and GLP-1 secretion. Gs-coupled receptor stimulation primarily triggered GLP-1 secretion, which was amplified by high glucose levels in GLUTag cells. Pasireotide drastically inhibited GLP-1 secretion induced by Gs-coupled receptor stimulation through SSTR5-Gi-dependent inhibition of cAMP levels, suggesting that the main pathway was completely blocked. Furthermore, administering GLP-1 partially overcame the inhibitory effect of pasireotide in GLP-1R-MIN-6 cells, leading to a partial recovery of insulin secretion. The drastic inhibition of GLP-1 secretion via shutdown of the main pathway is the primary cause of pasireotide-induced hyperglycemia. GLP-1 analogs, rather than DPP-4 inhibitors, can spare pasireotide-induced depletion of endogenous GLP-1 and restore insulin secretion.