Full text
| |
| Author(s): |
Alessandra Sussulini
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Química |
| Defense date: | 2010-02-19 |
| Examining board members: |
Marco Aurelio Zezzi Arruda;
Mario Francisco Pereira Juruena;
Ricardo Erthal Santelli;
Fernando Antonio Santos Coelho;
Carlos Henrique Inacio Ramos
|
| Advisor: | Marco Aurelio Zezzi Arruda; Cláudio Eduardo Müller Banzato |
| Abstract | |
Bipolar disorder is a psychiatric illness characterized by marked mood changes, oscillating between mania and depression episodes, which affects 1-3% of the worldwide population. Molecular level mechanisms of this disorder, as well as of its treatment with lithium, which is the most widely used medication, are not yet known. Thus, the aim of this work consisted in explore potential biomarkers (metabolites, proteins, metal ions free or bounded to proteins) for bipolar disorder and its treatment with lithium. For this purpose, it was performed the comparison of metabonomic (using hydrogen nuclear magnetic resonance spectroscopy and chemometric analysis), proteomic (using 2-D gel electrophoresis and different molecular mass spectrometry techniques), and metallomic (using inductively coupled plasma mass spectrometry) profiles for blood serum samples of bipolar disorder patients treated with lithium (n = 15) or other drugs than lithium (n = 10) and healthy individuals (n = 25). Metabonomic analyses indicated lipids as the most affected metabolites in the presence of bipolar disorder and of lithium treatment, which corroborated with the results of proteomic analyses, where apolipoprotein A-I was one of the proteins that showed highest alterations in its levels. It was downregulated in bipolar disorder patients, independently of the treatment, but showed a level restored to that of the control group after lithium treatment. Ionomic analyses detected As, B, Cl, Cr, Fe, K, Li, Mg, P, S, Se, Si, Sr e Zn as differential free ions, and metalloproteomic analyses detected mainly Ca, Co, Fe, K, Mg, Mn, Na, Ti and Zn bound to proteins as being the metals that presented highest alterations in the presence of bipolar disorder and lithium treatment. Among the metal-binding proteins that indicated differences between the studied groups, apolipoprotein A-I, transthyretin and vitronectin, which were previously identified in the proteomic analyses, are highlighted. With the studies described in this research work, it was possible to identify, in an exploratory way, differential molecules that can guide future studies on the patophysiological mechanisms of bipolar disorder or terapeutic action pathways of drugs like lithium, as well as on the discovery of biomarkers for the illness and/or its treatment with lithium (AU) | |