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A Neutral Effect of Metformin Treatment on Macroprolactin Content in Women with Macroprolactinemia

, : A Neutral Effect of Metformin Treatment on Macroprolactin Content in Women with Macroprolactinemia. Experimental and Clinical Endocrinology & Diabetes

NlmCategory="UNASSIGNED">Background: Metformin decreases serum levels of monomeric prolactin. No previous study has investigated the effect of metformin on macroprolactin content in patients with macroprolactinemia. Methods: We studied three age-, sex- and weight-matched groups of patients: 15 women with monomeric prolactin, 12 women with macroprolactin, as well as 15 women with normal prolactin levels. Because of coexisting 2 diabetes or prediabetes all patients were treated with metformin (1.7-3 g daily). Plasma lipids, glucose homeostasis markers, as well as serum levels of prolactin and macroprolactin were assessed at baseline and after 4 months of metformin treatment. Results: As expected, metformin reduced plasma glucose and triglycerides, as well as improved insulin sensitivity in all treatment groups. Moreover, the drug reduced post-polyethylene glycol prolactin levels and tended to reduce pre-polyethylene glycol prolactin levels in women with monomeric prolactin but not in women with macroprolactinemia and women with normal prolactin levels. Conclusion: The obtained results indicate that metformin has a negligible effect on macroprolactin levels.


PMID: 27750350

DOI: 10.1055/s-0042-117718

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