Salivary alpha-amylase and hormones levels of young adults with different body composition

Author(s)

Lucas, Barbara de Lima ; Barbosa, Tais de Souza ; Castelo, Paula Midori ; Duarte Gaviao, Maria Beatriz

• Document type: Journal article
• Source: JOURNAL OF TEXTURE STUDIES; v. 50, n. 1, p. 8-pg., 2019-02-01.

Abstract

The aim of this study was to assess the differences in salivary biomarker levels of young adults classified according to body fat accumulation. One hundred and thirty-four volunteers were evaluated (mean age 212years). Body composition was calculated through skinfold thickness: supra-iliac, biceps, and triceps, sub-scapular. Body fat percentage (BF%) was used to classify subjects according to fat tissue accumulation: normal-weight (n=37, 19 females, 18 males), overweight (n=42, 30 females, 12 males), and obese (n=55, 42 females, 13 males). Saliva samples were collected 30min after awakening to determine salivary levels of 17-beta-estradiol. For salivary cortisol and alpha-amylase activity (sAA) three samples were obtained, just after awakening, 30min after awakening and at bedtime. Oral contraceptive intake was considered for the female group. The results showed that overweight and obese females using oral contraceptive presented lower levels of 17--estradiol than normal-weight females. In overweight and obese males, sAA levels were higher 30min post-awakening when compared with the normal-weight group. The comparison of sAA levels within time showed no difference for males; obese females showed significant higher values at bedtime than 30 min post-awakening. The salivary cortisol concentration showed higher values at morning decreasing significantly at bedtime for all groups. Concluding, differences in 17--estradiol and sAA levels were found in females and males, respectively, according to body fat accumulation, showing the usefulness of salivary biomarkers in the study of systemic conditions. (AU)

• FAPESP's process: 10/02020-0 - Bite force and salivary hormone levels associated to malocclusions and signs and symptoms of temporomandibular disfunction in adolescents with and without obesity.
• Grantee: Barbara de Lima Lucas
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/19616-3 - Bite force and salivary hormone levels associated to malocclusions and signs and symptoms of temporomandibular disfunction in adolescents with and without obesity
• Grantee: Maria Beatriz Duarte Gavião
• Support Opportunities: Regular Research Grants