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Effects of intrahypothalamic administration of antisense DNA for progesterone receptor mRNA on reproductive behavior and progesterone receptor immunoreactivity in female rat

S Ogawa, UE Olazabal, IS Parhar and DW Pfaff
Journal of Neuroscience 1 March 1994, 14 (3) 1766-1774; DOI: https://doi.org/10.1523/JNEUROSCI.14-03-01766.1994
S Ogawa
Laboratory of Neurobiology and Behavior, Rockefeller University, New York, New York 10021.
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UE Olazabal
Laboratory of Neurobiology and Behavior, Rockefeller University, New York, New York 10021.
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IS Parhar
Laboratory of Neurobiology and Behavior, Rockefeller University, New York, New York 10021.
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DW Pfaff
Laboratory of Neurobiology and Behavior, Rockefeller University, New York, New York 10021.
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Abstract

Since reproductive behaviors of female rats can be correlated with estrogen-induced increases in progestin binding by hypothalamic neurons, we hypothesized that specific progesterone receptor (PR) antisense DNA sequences might decrease these behaviors. Antisense oligonucleotides (15 bases), spanning the translation start site of rabbit PR mRNA, were microinjected directly among ventromedial hypothalamic neurons, and their behavioral effects were compared to control oligonucleotides composed of the same nucleotide bases in scrambled order. When applied 12 but not 24 hr after estradiol, the PR antisense treatment significantly reduced iordosis behavior, measured either as a reflex or in a mating behavior test. Notably, proceptive behaviors, which are strongly progesterone dependent, were greatly reduced in their occurrence (80% decrease). To see if PR protein was also reduced, antisense DNA was administered near the ventromedial hypothalamus on one side of the brain, while the other side received the scrambled control sequence or vehicle. The total number of PR- immunoreactive cells on the antisense side was significantly lower in the ventromedial nucleus, but not in control measurements from the medial preoptic area. Interrupting gene expression for PR, a transcription factor, in hypothalamic neurons, can have behavioral and immunocytochemical effects.

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The Journal of Neuroscience: 14 (3)
Journal of Neuroscience
Vol. 14, Issue 3
1 Mar 1994
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Effects of intrahypothalamic administration of antisense DNA for progesterone receptor mRNA on reproductive behavior and progesterone receptor immunoreactivity in female rat
S Ogawa, UE Olazabal, IS Parhar, DW Pfaff
Journal of Neuroscience 1 March 1994, 14 (3) 1766-1774; DOI: 10.1523/JNEUROSCI.14-03-01766.1994

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Effects of intrahypothalamic administration of antisense DNA for progesterone receptor mRNA on reproductive behavior and progesterone receptor immunoreactivity in female rat
S Ogawa, UE Olazabal, IS Parhar, DW Pfaff
Journal of Neuroscience 1 March 1994, 14 (3) 1766-1774; DOI: 10.1523/JNEUROSCI.14-03-01766.1994
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