Lactotroph Cells
Anterior Pituitary, Growth Hormone and Prolactin
Lactotroph Cells
Lactotrophs synthesize and release prolactin in the anterior pituitary. Unlike many pituitary cells, they operate under strong tonic inhibition from hypothalamic dopamine.
Regulatory inputs
Dopamine acts at D2 receptors to restrain secretion. Estrogens, pregnancy-related changes, suckling-associated pathways and other signals modify lactotroph activity.
Adaptation and growth
Lactotroph function and abundance change during pregnancy and lactation. Hormone production is therefore linked to physiological state rather than a fixed baseline across the life course.
Clinical interpretation
An elevated prolactin result may reflect a lactotroph tumor, medication effects, pregnancy, hypothyroidism or other conditions. Recognizing the cell type does not identify the cause. Persistent elevation requires interpretation with symptoms, relevant exclusions and assay considerations.
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