for this reason we measured hypothalamic and reproductive tissue levels of trh-ir , hypothalamic levels of somatostatin ( srif ) , and beta-endorphin ( ep ) , serum levels of prolactin ( prl ) , growth hormone ( gh ) , thyrotropin ( tsh ) , and thyroxine ( t4 ) in young , sexually mature and 24-28 month-old male long-evans and sprague-dawley rats .
C0020663
hypothalamic
C0037659
srif