title: Salivary alpha-amylase, secretory IgA and free cortisol as neurobiological components of the stress response in the acute phase of anorexia nervosa.
abstract: Objectives One novel hypothesis of the pathogenesis of anorexia nervosa (AN) is the possible role of mental stress in hyperactivity of the autonomic nervous system (ANS) and of the hypothalamic-pituitary-adrenal (HPA) axis. Two components of stress response - salivary alpha-amylase (sAA) and free cortisol - have been proposed. They can be determined in saliva, which closely reflects their concentrations in plasma. The purpose of this study was to measure salivary free cortisol, sAA and their correlation to secretory IgA (sIgA) of patients with AN in comparison to the average population. Methods A controlled clinical trial was designed for a matched group of 47 AN patients and 54 healthy individuals. After clinical examination, unstimulated salivary samples were taken during the acute stage of AN (BMI < 15 kg/m(2)) in the first week of hospitalisation. An enzyme-linked immunosorbent assay (ELISA) suitable for measuring sAA, sIgA and free cortisol were used. Results Anorexic patients exhibited disturbances in sAA secretion, and significantly increased cortisol and sIgA levels with a distinct correlation between these two parameters. Conclusions The behaviour of cortisol, sAA and sIgA levels can be assessed as an effect of stress reaction among AN patients with hyperactivity of the HPA axis and ANS dysregulation. The effect of stress response can be assessed reliably in saliva.
authors.affiliation: a Department of Biomaterials and Experimental Dentistry , Poznan University of Medical Sciences , Poznan , Poland ;
authors.forename: E
authors.initials: E
authors.lastname: Paszynska
authors.affiliation: b Psychiatric Genetics Unit, Department of Psychiatry , Poznan University of Medical Sciences , Poznan , Poland ;
authors.forename: M
authors.initials: M
authors.lastname: Dmitrzak-Weglarz
authors.affiliation: c Department of Child and Adolescent Psychiatry , Poznan University of Medical Sciences , Poznan , Poland.
authors.forename: M
authors.initials: M
authors.lastname: Tyszkiewicz-Nwafor
authors.affiliation: c Department of Child and Adolescent Psychiatry , Poznan University of Medical Sciences , Poznan , Poland.
authors.forename: A
authors.initials: A
authors.lastname: Slopien
mesh_terms: D000293:Adolescent; D000856:Anorexia Nervosa / Q000523:psychology*; D001341:Autonomic Nervous System; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000032:analysis*; D007030:Hypothalamo-Hypophyseal System / Q000378:metabolism; D007071:Immunoglobulin A, Secretory / Q000032:analysis*; D008297:Male; D009752:Nutritional Status; D010913:Pituitary-Adrenal System / Q000378:metabolism; D011044:Poland; D012463:Saliva / Q000737:chemistry*; D055291:Salivary alpha-Amylases / Q000032:analysis*; D013315:Stress, Psychological / Q000378:metabolism*
chemical_list: D007071:Immunoglobulin A, Secretory; D055291:Salivary alpha-Amylases; D006854:Hydrocortisone
keywords: Anorexia nervosa; alpha-amylase; cortisol; sIgA; saliva