Elevated plasma concentrations of bacterial ClpB protein in patients with eating disorders.
Int J Eat Disord
; 49(8): 805-8, 2016 Aug.
Article
em En
| MEDLINE
| ID: mdl-27038326
ABSTRACT
OBJECTIVE:
Caseinolytic protease B (ClpB) produced by Enterobacteria, such as Escherichia coli, has been identified as a conformational mimetic of α-melanocyte-stimulating hormone (α-MSH), an anorexigenic and anxiogenic neuropeptide. In mice, ClpB induces α-MSH cross-reactive antibodies and activates anorexigenic brain neurons. In patients with eating disorders (ED), anti-ClpB and anti-α-MSH antibodies correlate with psychopathological traits. However, it is not known if ClpB is present in human plasma including ED patients.METHODS:
Plasma concentrations of ClpB were measured using a recently developed ClpB immunoassay in female patients with anorexia nervosa, bulimia nervosa, and binge-eating disorder and compared with healthy participants, all characterized by the Eating Disorder Inventory-2 (EDI-2) scale.RESULTS:
We found that ClpB was readably detectable in plasma of healthy participants and ED patients and that its concentrations were elevated in ED patients, without significant differences in patient's subgroups. Plasma ClpB concentrations correlated with the EDI-2 scores, with α-MSH as well as with plasma levels of anti-ClpB and anti-α-MSH antibodies.DISCUSSION:
These data revealed that bacterial ClpB is naturally present in human plasma and that its concentrations can be elevated in ED patients and associated with ED-related psychopathological traits. These results support a link between bacterial ClpB and the ED pathophysiology. © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49805-808).Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Transtornos da Alimentação e da Ingestão de Alimentos
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Proteínas de Escherichia coli
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Proteínas de Choque Térmico
Tipo de estudo:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article