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10.1523/JNEUROSCI.1736-15.2015 http://scihub22266oqcxt.onion/10.1523/JNEUROSCI.1736-15.2015 C4556785!4556785!26338326     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=26338326&cmd=llinks): Failed to open stream: HTTP request failed! 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Incubation of Fear Is Regulated by TIP39 Peptide Signaling in the Medial Nucleus of the Amygdala |pdf=|usr=}}{{26338326}} gab.com Text Incubation of Fear Is Regulated by TIP39 Peptide Signaling in the Medial Nucleus of the Amygdala JO: J Neurosci http://www.kidney.de/pget.php?&tw=1&pmid=26338326 #FOAvip Fear-related psychopathologies such as post-traumatic stress disorder are characterized by impaired extinction of fearful memories. Recent behavioral evidence suggests that the neuropeptide tuberoinfundibular peptide of 39 residues (TIP39), via its receptor, the parathyroid hormone 2 receptor (PTH2R), modulates fear memory. Here we examined the anatomical and cellular localization of TIP39 signaling that contributes to the increase in fear memory over time following a traumatic event, called fear memory incubation. Contextual freezing, a behavioral sign of fear memory, was significantly greater in PTH2R knock-out than wild-type male mice 2 and 4 weeks after a 2 s 1.5 mA footshock. PTH2R knock-out mice had significantly reduced c-Fos activation in the medial amygdala (MeA) following both footshock and fear recall, but had normal activation in the hypothalamic paraventricular nucleus and the amygdalar central nucleus compared with wild-type. We therefore investigated the contribution of MeA TIP39 signaling to fear incubation. Similar to the effect of global TIP39 signaling loss, blockade of TIP39 signaling in the MeA by lentivirus-mediated expression of a secreted PTH2R antagonist augmented fear incubation. Ablation of MeA PTH2R-expressing neurons also strengthened the fear incubation effect. Using the designer receptor exclusively activated by designer drug pharmacogenetic approach, transient inhibition of MeA PTH2R-expressing neurons before or immediately after the footshock, but not at the time of fear recall, enhanced fear incubation. Collectively, the findings demonstrate that TIP39 signaling within the MeA at the time of an aversive event regulates the increase over time in fear associated with the event context.SIGNIFICANCE STATEMENT Fear-related psychopathologies such as post-traumatic stress disorder (PTSD) are characterized by excessive responses to trauma-associated cues. Fear responses can increase over time without additional cue exposure or stress. This work shows that modulatory processes within the medial nucleus of the amygdala near the time of a traumatic event influence the strength of fear responses that occur much later. The modulatory processes include signaling by the neuropeptide TIP39 and neurons that express its receptor. These findings will help in the understanding of why traumatic events sometimes have severe psychological consequences. One implication is that targeting neuromodulation in the medial amygdala could potentially help prevent development of PTSD. Twit Text FOAVip Incubation of Fear Is Regulated by TIP39 Peptide Signaling in the Medial Nucleus of the Amygdala ????J Neurosci http://www.kidney.de/pget.php?&tw=1&pmid=26338326 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=26338326 #FOAvip English Wikipedia <ref>{{Cite pmid|26338326}}</ref> Incubation of Fear Is Regulated by TIP39 Peptide Signaling in the Medial Nucleus of the Amygdala #MMPMID26338326 Tsuda MC; Yeung HM; Kuo J; Usdin TB J Neurosci 2015[Sep]; 35 (35): 12152-61 PMID26338326show ga Fear-related psychopathologies such as post-traumatic stress disorder are characterized by impaired extinction of fearful memories. Recent behavioral evidence suggests that the neuropeptide tuberoinfundibular peptide of 39 residues (TIP39), via its receptor, the parathyroid hormone 2 receptor (PTH2R), modulates fear memory. Here we examined the anatomical and cellular localization of TIP39 signaling that contributes to the increase in fear memory over time following a traumatic event, called fear memory incubation. Contextual freezing, a behavioral sign of fear memory, was significantly greater in PTH2R knock-out than wild-type male mice 2 and 4 weeks after a 2 s 1.5 mA footshock. PTH2R knock-out mice had significantly reduced c-Fos activation in the medial amygdala (MeA) following both footshock and fear recall, but had normal activation in the hypothalamic paraventricular nucleus and the amygdalar central nucleus compared with wild-type. We therefore investigated the contribution of MeA TIP39 signaling to fear incubation. Similar to the effect of global TIP39 signaling loss, blockade of TIP39 signaling in the MeA by lentivirus-mediated expression of a secreted PTH2R antagonist augmented fear incubation. Ablation of MeA PTH2R-expressing neurons also strengthened the fear incubation effect. Using the designer receptor exclusively activated by designer drug pharmacogenetic approach, transient inhibition of MeA PTH2R-expressing neurons before or immediately after the footshock, but not at the time of fear recall, enhanced fear incubation. Collectively, the findings demonstrate that TIP39 signaling within the MeA at the time of an aversive event regulates the increase over time in fear associated with the event context.SIGNIFICANCE STATEMENT Fear-related psychopathologies such as post-traumatic stress disorder (PTSD) are characterized by excessive responses to trauma-associated cues. Fear responses can increase over time without additional cue exposure or stress. This work shows that modulatory processes within the medial nucleus of the amygdala near the time of a traumatic event influence the strength of fear responses that occur much later. The modulatory processes include signaling by the neuropeptide TIP39 and neurons that express its receptor. These findings will help in the understanding of why traumatic events sometimes have severe psychological consequences. One implication is that targeting neuromodulation in the medial amygdala could potentially help prevent development of PTSD. äIncubation of Fear Is Regulated by TIP39 Peptide Signaling in the Medi(epmc).pdf DeepDyve Pubget Overpricing