Avaliação da função mastigatória, salivar, antropométrica, presença de compostos sulfurados voláteis em adultos jovens e alterações em glândula salivar após indução de adipogênese em modelo animal

Author(s)

Polliane Morais de Carvalho

• Document type: Doctoral Thesis
• Press: Piracicaba, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba
• Defense date: 2014-01-12

Examining board members

Maria Beatriz Duarte Gavião; Simone Cecilio Hallak Regalo; Leonardo Rigoldi Bonjardim; Fernanda Miori Pascon; Renata Cunha Matheus Rodrigues Garcia

• Advisor: Maria Beatriz Duarte Gavião

Abstract

This study investigated masticatory function, the presence of volatile sulfur compounds (VSC) and salivary biochemistry in healthy subjects (18-33 years), and also the induction of adipocytes in the salivary gland and its implication in an animal model. Three studies were conducted, presented as chapters. Chapter 1: Investigated the performance and chewing ability, taste, and the possible relationship to gender, body mass index (BMI), waist circumference (WC) and stimulated salivary flow (Stim) and unstimulated (Unst). 171 individuals (125? 46?) were evaluated. Masticatory performance was determined by the ability of fragmentation Optocal plus and chewing ability with the use of visual analogue scale (VAS). Taste was verified by the perception of the four primary flavors. Descriptive statistics, normality tests, correlation, comparison and multiple linear regression models were used. In multiple linear regression performance was not predict by the independent variables in the model. With chewing ability the model explained 14% of variability and 5% for the taste. The results indicated that masticatory performance was not related to anthropometric parameters and saliva in healthy young subjects. The ability was related to BMI, WC and Gender. Taste was weakly related to BMI and WC. Chapter 2: Verify the salivary biochemistry and presence of VSC and the possible influence of BMI, flow and pH (Stim)/(Unst). For the verification of VSC 71 volunteers (14 57? ?) were assessed using the Oral chromeTM device. The concentrations of: total protein, calcium, phosphate, urea and amylase were investigated in 171 volunteers (46 125? ?) in saliva (Stim) / (Unst). Biochemical salivary were similar in respect of anthropometry. However, the concentrations differed significantly between saliva (Stim)/(Unst), with the exception of amylase. The sample presented similar amounts of CSV in relation to BMI. In individuals with critical values of methylmercaptan (CH3SH) we observed a significant correlation (r = 0:51) with pH Unst. The results indicate that in healthy young subjects salivary biochemistry and VSC exhibit similar behaviour in relation to BMI. The (CH3SH) when greater than the normal limit concentration was correlated to pH Unst. Chapter 3: We investigated the possible appearance of adipocytes in the salivary glands in animal model (mice). Adipogenesis was performed with high-fat diet, and also via peroxisome proliferator-gamma (PPAR gamma) with rosiglitazone . Western blot, histochemistry and immunohistochemistry were used. Microarray analysis was performed to assess the effect of diet. Antibodies: phospho-4E-BP1 and tyrosine hydroxylase marked mTOR and nerves activity, respectively. The microarray showed a large number of genetic changes. Regarding diet was observed low or no expression of phospho-4E-BP1 and an increase in tyrosine hydroxylase activity. In mice treated with rosiglitazone there was activation of mTOR and tyrosine hydroxylase. The results suggest that there are changes in salivary gland innervation before stimuli for adipogenesis. Conclusion: We concluded that in healthy young individuals masticatory function was not influenced by the salivary pattern and was weakly related to anthropometric. Salivary Biochemical and presence of CSV was similar in relation to anthropometry. There are alterations in the activity of the nervous system in the salivary glands of mice due high fat diet or activation of PPAR gamma (AU)

• FAPESP's process: 11/08715-3 - Chewing evaluation, salivary, nutritional status, anthropometry, and halitosis in young adults
• Grantee: Polliane Morais de Carvalho
• Support Opportunities: Scholarships in Brazil - Doctorate