Structural changes of hippocampi and expression of HSP70, C-FOS and dream proteins in the spinal cord after acute thermal stimulus or early stress-experienced rats

• Main Author: Mat Taib, Che Norma
• Format: Thesis
• Language: English
• Published: 2014
• Subjects: R5-130.5 General works
• Online Access: http://eprints.usm.my/36428/1/Dr._Che_Norma_Binti_Mat_Taib_TSTZ_%28NN24%29.pdf; http://eprints.usm.my/36428/

Kajian bertujuan untuk mengetahui kesan stres haba akut pada ekspresi protein HSP70, c-Fos and DREAM dalam usaha memahami mekanisma stres di peringkat neonat dan kesan pada kehidupan berikutnya. Fasa pertama kajian menilai ujian berenang secara paksa (FST) sebagai model induksi stres sederhana pada tikus neonat. FST dilakukan pada umur 7, 8 dan 9 hari selepas kelahiran. Kesemua tikus neonat hidup dan berada dalam keadaan sihat selepas FST. Berat badan mereka menurun pada hari ke 14 hingga 42 dan meningkat semula dan menyamai kumpulan kawalan pada hari ke 49 dan seterusnya. Nisbah sel neutrofil dan limfosit meningkat secara signifikan pada kumpulan FST berbanding dengan kumpulan kawalan. Skor BrdU menurun pada kumpulan FST berbanding tikus kawalan membuktikan berlakunya neurogenesis. This current study was to explore the effect of acute thermal stress on the expression of HSP70, c-Fos and DREAM proteins in an attempt to understand the mechanisms of neonatal stress and the effect on stress later in life. Phase one of this study evaluated forced swimming test (FST) as a model for induction of moderate stress in neonatal rats. Forced swimming test was applied to neonatal rats on days 7, 8 and 9 of life. All the pups survived and remained healthy after FST. From day 14 to day 42, the FST group had significantly lower body weights when compared to the control group. Their body weights were back to control levels on day 49 onwards. Forced swimming test significantly increased neutrophil/lymphocyte ratios in the stress group compared to controls.