Mesulergine () (developmental code name CU-32085) is a drug of the

ergoline Ergoline is a chemical compound whose structural skeleton is contained in a variety of alkaloids, referred to as ergoline derivatives or ergoline alkaloids. Ergoline alkaloids, one being ergine, were initially characterized in ergot. Some of thes ...

group which was never marketed. It acts on

serotonin Serotonin () or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter. Its biological function is complex and multifaceted, modulating mood, cognition, reward, learning, memory, and numerous physiological processes such as vomiting and va ...

and

dopamine receptor Dopamine receptors are a class of G protein-coupled receptors that are prominent in the vertebrate central nervous system (CNS). Dopamine receptors activate different effectors through not only G-protein coupling, but also signaling through diffe ...

s. Specifically, it is an

agonist An agonist is a chemical that activates a receptor to produce a biological response. Receptors are cellular proteins whose activation causes the cell to modify what it is currently doing. In contrast, an antagonist blocks the action of the ag ...

of dopamine D₂-like receptors and serotonin 5-HT₆ receptors and an antagonist of serotonin 5-HT_2A, 5-HT_2B, 5-HT_2C, and 5-HT₇ receptors. It also has affinity for the 5-HT_1A, 5-HT_1B, 5-HT_1D, 5-HT_1F, and 5-HT_5A receptors.National Institute of Mental Health. PDSD Ki Database (Internet). ChapelHill (NC): University of North Carolina. Available from: The compound had entered clinical trials for the treatment of

Parkinson's disease Parkinson's disease (PD), or simply Parkinson's, is a long-term degenerative disorder of the central nervous system that mainly affects the motor system. The symptoms usually emerge slowly, and as the disease worsens, non-motor symptoms beco ...

; however, further development was halted due to adverse

histological Histology, also known as microscopic anatomy or microanatomy, is the branch of biology which studies the microscopic anatomy of biological tissues. Histology is the microscopic counterpart to gross anatomy, which looks at larger structures vis ...

abnormalities in rats. It was also investigated for the treatment of

hyperprolactinemia Hyperprolactinaemia is the presence of abnormally high levels of prolactin in the blood. Normal levels average to about 13 ng/mL in women, and 5 ng/mL in men, with an upper normal limit of serum prolactin levels being 15-25 ng/mL ...

(high prolactin levels).

References

5-HT6 agonists Abandoned drugs Dopamine agonists Ergolines Prolactin inhibitors Serotonin receptor antagonists Sulfamides {{Nervous-system-drug-stub