Volume 22, Issue 2 (Febraory 2024)                   IJRM 2024, 22(2): 101-110 | Back to browse issues page

Ethics code: IR.UK.VETMED. REC. 1400.016


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Nikkhouy P, Abbasnejad M, Esmaeili-Mahani S, Kooshki R. Mode of delivery alters sensitivity to thermal and chemical stimuli in adult rats: An experimental study. IJRM 2024; 22 (2) :101-110
URL: http://ijrm.ir/article-1-3109-en.html
1- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran.
2- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran. Laboratory of Molecular Neuroscience, Kerman Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran.
3- Department of Biology, Faculty of Sciences, Lorestan University, Khorramabad, Iran. , kooshki.r@lu.ac.ir
Abstract:   (387 Views)

Background: The mode of delivery might prompt a long-lasting alteration in physiological and behavioral responsiveness in offspring.
Objective: This study was intended to evaluate if the mode of delivery could alter sensitivity to thermal and chemical stimuli in female rats.
Materials and Methods: 56 adult female Wistar rats (200-220 gr) that were born by vaginal or cesarean section (C-section) were used (n = 28/each). Inflammatory pain was induced by subcutaneous injection of formalin into the hind paw. The thermal nociceptive threshold was determined by tail-flick and hot plate tests. Besides, the Western blot test was used to evaluate the spinal cord levels of c-Fos and c-Jun proteins.
Results: Formalin-induced inflammation was significantly decreased in C-section group as compared to vaginally born rats (p < 0.001). The baseline nociceptive threshed and morphine-induced analgesia were significantly increased in C-section groups in comparison to vaginally born rats. In addition, the levels of c-Fos and c-Jun proteins were significantly decreased in the spinal cord of C-section rats as compared to vaginally born animals (p < 0.01). Morphine treatment could decrease the expression of c-Fos and c-Jun in the C-section group (p < 0.05).
Conclusion: Overall, C-section rats showed lower spinal nociceptive processing and neuronal activity later in life, compared to the vaginal born rats.

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Type of Study: Original Article | Subject: Reproductive Biology

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