Detalhes bibliográficos
| Ano de defesa: |
2019 |
| Autor(a) principal: |
SILVA, José Radamés Ferreira da
 |
| Orientador(a): |
NOGUEIRA, Romildo de Albuquerque |
| Banca de defesa: |
FERNANDES, Thiago de Salazar e,
COSTA, Edberghe Ventura Lola,
MEDEIROS, Victor Wanderley Costa de,
PONTUAL, Emmanuel Viana |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal Rural de Pernambuco
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Biociência Animal
|
| Departamento: |
Departamento de Morfologia e Fisiologia Animal
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/8139
|
Resumo: |
Studies on the influence of exposure to electric and magnetic fields on pancreatic islets are still scarce and controversial, and it is difficult to compare existing studies because of the different research methods employed. In this work, computational simulations were used to study burst patterns during exposure of pancreatic β cells to pulses of constant voltages. The in silico results show that the burst patterns in pancreatic β cells are dependent on the external voltage applied and that some voltages may even inhibit this phenomenon. It was shown in these in silico experiments that there are critical voltages, such as 2.16 mv, in which the burst shape changes from a medium oscillation phase to a slow oscillation phase. While at a voltage of 3.5 mv a transition occurs in the burst from the slow-to-rapid oscillation phase. Voltages greater than 3.5 mv in our simulations led to a pattern with absence of bursts, indicating inhibition in the insulin secretion process. These results are reinforced by phase space analysis, which presents a state map or differential equation system variables of a mathematical dynamic model. In order to test the results obtained in vitro, an open-source electrical pulse generator was developed with the aid of the arduino platform, aiming at the application of low voltages constant pulses in the islets of Langerhans. |
