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Analysis of differential gene expression of dorsal ganglion root cell in a model of Diabetes and Peripheral Diabetic Neuropathy

Grant number: 11/23764-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2012
Effective date (End): February 29, 2016
Field of knowledge:Biological Sciences - Physiology - Physiology of Organs and Systems
Principal Investigator:Carlos Amilcar Parada
Grantee:Maria Carolina Pedro Athié
Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Diabetic Peripheral Neuropathy (DPN) manifests in 60% of diabetic patients and counts for one of the major causes of peripheral members amputation. Besides, diabetes is responsible for 30% of all neuropathic pain diagnosed. Even though the electrophysiological and morphological aspects are well described, little is known about its development and progression, impossibilitating effective therapies. It is believed that hyperglycemia and insulin impairment signaling are the main events behind oxidative stress observed in nerves. Several hypothesis try to explain the phenomenon, like enhancement activity of the polliol pathway, greater production of AGES, impairment of neurotrofic support, PKC activity enhancement and mitochondrial failure, but until now there are still many gaps in the disease development knowledge and the cellular populations involved. Besides neurons, there are evidences that glial satellite cell located in the dorsal root ganglia (DRG) actively contribute to inflammation promotion in injury neuropathy, a non-explored fact in DPN. Recent data from our laboratory correlate experimentally DPN development with a shorter period in developing hyperglycemia induced by low doses of streptozotocin (STZ) whether late hyperglycemic rats in the same model did not had DPN. These original data permitted us to establish new model criteria of diabetes induced by STZ more close to the clinic. That said, this project objective is to explore, by DNA microarrays analysis, the major molecules or pathways differentially expressed in neurons and glial satellite cells of DRG from rats model of STZ-induced type I diabetes presenting DPN or not. Further, the possible candidate genes will be validated in the same tissues, by Real-Time PCR and Western Blot. With this approach we expect to find potential genes or pathways that might be enrolled with, allowing future advances in effective treatments or even neuropatic reversion.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PEDRO ATHIE, MARIA CAROLINA; VIEIRA, ANDRE SCHWAMBACH; TEIXEIRA, JULIANA MAIA; DOS SANTOS, GILSON GONCALVES; DIAS, ELAYNE VIEIRA; TAMBELI, CLAUDIA HERRERA; SARTORI, CESAR RENATO; PARADA, CARLOS A.. Transcriptome analysis of dorsal root ganglia's diabetic neuropathy reveals mechanisms involved in pain and regeneration. Life Sciences, v. 205, p. 54-62, . (11/23764-0, 14/25153-7)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
ATHIÉ, Maria Carolina Pedro. Differential gene expression of dorsal root ganglia cells in a rat model of diabetes and diabetic neuropathy. 2016. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia Campinas, SP.

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