scholarly journals Norepinephrine transporter heterozygous knockout mice exhibit altered transport and behavior

2013 ◽  
Vol 12 (8) ◽  
pp. 749-759 ◽  
Author(s):  
H. M. Fentress ◽  
R. Klar ◽  
J. J. Krueger ◽  
T. Sabb ◽  
S. N. Redmon ◽  
...  
2016 ◽  
Vol 77 (2) ◽  
pp. 190-201 ◽  
Author(s):  
Heather K. Caldwell ◽  
Elizabeth A. Aulino ◽  
Angela R. Freeman ◽  
Travis V. Miller ◽  
Shannah K. Witchey
Keyword(s):  

2008 ◽  
Vol 19 (5-6) ◽  
pp. 566-574 ◽  
Author(s):  
Maria T.G. Perona ◽  
Shonna Waters ◽  
Frank Scott Hall ◽  
Ichiro Sora ◽  
Klaus-Peter Lesch ◽  
...  

2017 ◽  
Vol 318 ◽  
pp. 24-27 ◽  
Author(s):  
V.M. Kovalzon ◽  
L.S. Moiseenko ◽  
A.V. Ambaryan ◽  
S. Kurtenbach ◽  
V.I. Shestopalov ◽  
...  
Keyword(s):  

Neuroscience ◽  
2009 ◽  
Vol 162 (4) ◽  
pp. 870-880 ◽  
Author(s):  
F.S. Hall ◽  
X.-F. Li ◽  
J. Randall-Thompson ◽  
I. Sora ◽  
D.L. Murphy ◽  
...  

2021 ◽  
Author(s):  
Sharonda S Harris ◽  
Sara M Green ◽  
Mayank Kumar ◽  
Nikhil M Urs

Attention deficit hyperactivity disorder (ADHD) affects young children and manifests symptoms such as hyperactivity, impulsivity and cognitive disabilities. Psychostimulants, which are the primary treatment for ADHD, target monoamine transporters and have a paradoxical calming effect, but their mechanism of action, is unclear. Studies using the dopamine (DA) transporter (DAT) knockout mice, which have elevated striatal DA levels and are considered an animal model of ADHD, have suggested that the paradoxical calming effect of psychostimulants might be through the actions on serotonin neurotransmission. On the other hand, newer non-stimulant class of drugs such as atomoxetine and Intuniv suggest that targeting the norepinephrine (NE) system in the PFC might explain this paradoxical calming effect. We sought to decipher the mechanism of this paradoxical effect of psychostimulants through an integrated approach using ex vivo monoamine efflux experiments, monoamine transporter knockout mice, drug infusions and behavior. Our ex vivo efflux experiments reveal that NE transporter (NET) blocker desipramine elevates both norepinephrine and dopamine but not serotonin levels, in PFC tissue slices from wild-type and DAT-KO but not NET KO mice. However, serotonin (5-HT) transporter (SERT) inhibitor fluoxetine elevates only serotonin in all three genotypes. Systemic administration of both desipramine and fluoxetine but local PFC infusion of only desipramine and not fluoxetine inhibits hyperactivity in the DAT-KO mice. In contrast, pharmacological norepinephrine depletion but dopamine elevation using Nepicastat also inhibits hyperactivity in DATKO mice. Together, these data suggest that elevation of PFC dopamine and not norepinephrine or serotonin as a convergent mechanism for the paradoxical psychostimulant effects observe in ADHD therapy.  


CNS Spectrums ◽  
2003 ◽  
Vol 8 (8) ◽  
pp. 572-577 ◽  
Author(s):  
Jay A. Gingrich ◽  
Mark S. Ansorge ◽  
Robert Merker ◽  
Noelia Weisstaub ◽  
Mingming Zhou

ABSTRACTSerotonin (5-HT) modulates numerous processes in the central nervous system that are relevant to neuropsychiatric function and dysfunction. It exerts significant effects on anxiety, mood, impulsivity, sleep, ingestive behaviors, reward systems, and psychosis. Serotonergic dysfunction has been implicated in several neuropsychiatric conditions but efforts to more clearly understand the mechanisms of this influence have been hampered by the complexity of this system at the receptor level. There are at least 14 distinct receptors that mediate the effects of 5-HT as well as several enzymes that control its synthesis and metabolism. Pharmacologic agents that target specific receptors have provided clues regarding the function of these receptors in the adult brain. 5-HT is also an important modulator of neural development and several groups have employed a genetic strategy to ablate specific components of the 5-HT system in order to understand the role of different serotonergic in development of brain systems relevant to behavior. Several inactivation mutations of specific 5-HT receptors have been generated producing interesting behavioral phenotypes related to anxiety, depression, drug abuse, psychosis, and cognition. In many cases, knockout mice have been used to confirm what has already been suspected based on pharmacologic studies. In other instances, mutations have demonstrated new functions of serotonergic genes in development and behavior.


PLoS ONE ◽  
2014 ◽  
Vol 9 (8) ◽  
pp. e105191 ◽  
Author(s):  
Adam D. Bachstetter ◽  
Scott J. Webster ◽  
Tao Tu ◽  
Danielle S. Goulding ◽  
Jacques Haiech ◽  
...  
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