Effects of post mortem interval and gender in DNA base excision repair activities in rat brains

Author(s)

Soltys, Daniela Tathiana ; Martins Pereira, Carolina Parga ; Ishibe, Gabriela Naomi ; de Souza-Pinto, Nadja Cristhina

• Document type: Journal article
• Source: MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS; v. 776, p. 6-pg., 2015-06-01.

Abstract

Most human tissues used in research are of post mortem origin. This is the case for all brain samples, and due to the difficulty in obtaining a good number of samples, especially in the case of neurodegenerative diseases, male and female samples are often included in the same experimental group. However, the effects of post mortem interval (PMI) and gender differences in the endpoints being analyzed are not always fully understood, as is the case for DNA repair activities. To investigate these effects, in a controlled genetic background, base excision repair (BER) activities were measured in protein extracts obtained from Wistar rat brains from different genders and defined PMI up to 24 hours, using a novel fluorescent-based in vitro incision assay. Uracil and AP-site incision activity in nuclear and mitochondrial extracts were similar in all groups included in this study. Our results show that gender and PMI up to 24 hours have no influence in the activities of the BER proteins UDG and APE1 in rat brains. These findings demonstrate that these variables do not interfere on the BER activities included in these study, and provide a security window to work with UDG and APE1 proteins in samples of post mortem origin. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 08/57721-3 - Redoxome
• Grantee: Ohara Augusto
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/07937-8 - Redoxome - Redox Processes in Biomedicine
• Grantee: Ohara Augusto
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 10/51906-1 - Mitochondrial bioenergetics, ion transport, redox state and DNA metabolism
• Grantee: Alicia Juliana Kowaltowski
• Support Opportunities: Research Projects - Thematic Grants