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2018 ; 115
(28
): E6576-E6584
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gab.com Text
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English Wikipedia
Autoantibodies reactive to adrenocorticotropic hormone can alter cortisol
secretion in both aggressive and nonaggressive humans
#MMPMID29941562
Værøy H
; Adori C
; Legrand R
; Lucas N
; Breton J
; Cottard C
; do Rego JC
; Duparc C
; Louiset E
; Lefebvre H
; Déchelotte P
; Western E
; Andersson S
; Hökfelt T
; Fetissov SO
Proc Natl Acad Sci U S A
2018[Jul]; 115
(28
): E6576-E6584
PMID29941562
show ga
Violent aggression in humans may involve a modified response to stress, but the
underlying mechanisms are not well understood. Here we show that naturally
present autoantibodies reactive to adrenocorticotropic hormone (ACTH) exhibit
distinct epitope-binding profiles to ACTH peptide in subjects with a history of
violent aggression compared with controls. Namely, while nonaggressive male
controls displayed a preferential IgG binding to the ACTH central part (amino
acids 11-24), subjects who had committed violent acts of aggression had IgG with
increased affinity to ACTH, preferentially binding to its N terminus (amino acids
1-13). Purified IgGs from approximately half of the examined sera were able to
block ACTH-induced cortisol secretion of human adrenal cells in vitro,
irrespective of the source of sample (from a control subject or a violent
aggressor). Nevertheless, in the resident-intruder test in mice, i.p. injection
of residents with ACTH and IgG from aggressive subjects, but not from control
subjects, shortened latency for the first attack against intruders.
Immunohistochemical screening of violent aggressors' sera on rat brain and
pituitary sections did not show IgG binding to ACTH-producing cells, but 4 of 16
sera revealed selective binding to a nonidentified antigen in vasopressinergic
neurons of the hypothalamic paraventricular and supraoptic nuclei. Thus, the data
show that ACTH-reactive plasmatic IgGs exhibit differential epitope preference in
control and violently aggressive subjects. These IgGs can modulate ACTH-induced
cortisol secretion and, hence, are involved in the regulation of the stress
response. However, the possible role of ACTH-reactive autoantibodies in
aggressive behavior needs further investigation.