TY  - JOUR
A1  - Waider, J
A1  - Popp, S
A1  - Lange, MD
A1  - Kern, R
A1  - Kolter, JF
A1  - Kobler, J
A1  - Donner, NC
A1  - Lowe, KR
A1  - Malzbender, JH
A1  - Brazell, CJ
A1  - Arnold, MR
A1  - Aboagye, B
A1  - Schmitt-Böhrer, A
A1  - Lowry, CA
A1  - Pape, HC
A1  - Lesch, KP
T1  - Genetically driven brain serotonin deficiency facilitates panic-like escape behavior in mice
JF  - Translational Psychiatry
N2  - Multiple lines of evidence implicate brain serotonin (5-hydroxytryptamine; 5-HT) system dysfunction in the pathophysiology of stressor-related and anxiety disorders. Here we investigate the influence of constitutively deficient 5-HT synthesis on stressor-related anxiety-like behaviors using Tryptophan hydroxylase 2 (Tph2) mutant mice. Functional assessment of c-Fos after associated foot shock, electrophysiological recordings of GABAergic synaptic transmission, differential expression of the Slc6a4 gene in serotonergic neurons were combined with locomotor and anxiety-like measurements in different contextual settings. Our findings indicate that constitutive Tph2 inactivation and consequential lack of 5-HT synthesis in Tph2 null mutant mice (Tph2\(^{-/-}\)) results in increased freezing to associated foot shock and a differential c-Fos activity pattern in the basolateral complex of the amygdala. This is accompanied by altered GABAergic transmission as observed by recordings of inhibitory postsynaptic currents on principal neurons in the basolateral nucleus, which may explain increased fear associated with hyperlocomotion and escape-like responses in aversive inescapable contexts. In contrast, lifelong 5-HT deficiency as observed in Tph2 heterozygous mice (Tph\(^{+/-}\)) is able to be compensated through reduced GABAergic transmission in the basolateral nucleus of the amygdala based on Slc6a4 mRNA upregulation in subdivisions of dorsal raphe neurons. This results in increased activity of the basolateral nucleus of the amygdala due to associated foot shock. In conclusion, our results reflect characteristic syndromal dimensions of panic disorder and agoraphobia. Thus, constitutive lack of 5-HT synthesis influence the risk for anxiety- and stressor-related disorders including panic disorder and comorbid agoraphobia through the absence of GABAergic-dependent compensatory mechanisms in the basolateral nucleus of the amygdala.
KW  - anxiety
KW  - stress
KW  - serotonin
KW  - genetics
KW  - mice
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-170239
VL  - 7
IS  - e1246
ER  - 
TY  - JOUR
A1  - Körner, Maria
A1  - Meyer, Susanne R.
A1  - Marincola, Gabriella
A1  - Kern, Maximilian J.
A1  - Grimm, Clemens
A1  - Schuelein-Voelk, Christina
A1  - Fischer, Utz
A1  - Hofmann, Kay
A1  - Buchberger, Alexander
T1  - The FAM104 proteins VCF1/2 promote the nuclear localization of p97/VCP
JF  - eLife
N2  - The ATPase p97 (also known as VCP, Cdc48) has crucial functions in a variety of important cellular processes such as protein quality control, organellar homeostasis, and DNA damage repair, and its de-regulation is linked to neuromuscular diseases and cancer. p97 is tightly controlled by numerous regulatory cofactors, but the full range and function of the p97–cofactor network is unknown. Here, we identify the hitherto uncharacterized FAM104 proteins as a conserved family of p97 interactors. The two human family members VCP nuclear cofactor family member 1 and 2 (VCF1/2) bind p97 directly via a novel, alpha-helical motif and associate with p97-UFD1-NPL4 and p97-UBXN2B complexes in cells. VCF1/2 localize to the nucleus and promote the nuclear import of p97. Loss of VCF1/2 results in reduced nuclear p97 levels, slow growth, and hypersensitivity to chemical inhibition of p97 in the absence and presence of DNA damage, suggesting that FAM104 proteins are critical regulators of nuclear p97 functions.
KW  - p97 VCP Cdc48
KW  - ubiquitin proteasome system
KW  - nuclear import
KW  - DNA damage repair
KW  - FAM104A
KW  - FLJ14775
KW  - FAM104B
KW  - FLJ20434
KW  - CXorf44
KW  - cell biology
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-350222
VL  - 12
ER  -