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With the use of poly-L-lysine, a method has been developed which induces acutely dissociated rat anterior pituitary cells to attach to glass and polyacrylamide surfaces. In these attached cells the recovery of the secretory response, which is impaired in acutely dissociated cells, has been followed, and it has been established that, in terms of their ability to secrete luteinizing hormone (LH) in response to the specific secretogogue luteinizing-hormone-releasing hormone (LHRH), the cells become maximally responsive after 48 h. The attached cells also allow the short-term kinetics of LH secretion to be followed with great facility; and, when cells allowed to recover for 48 h are used, it is shown that in response to LHRH the pattern of LH release is biphasic.

Short term kinetics of luteinizing hormone secretion studied in dissociated pituitary cells attached to manipulable substrates.