Introduction: Astrocytes are responsible for many essential functions of neurons in CNS. It has been recognised that chronic stress affects the morphology of astrocyte. Natural antioxidant such as honey has been used as one of the therapeutic strategies to lessen the damaging effect of chronic stress on our body. Therefore, the aim of the study is to explore the effect of natural antioxidant, Tualang honey (TH) on the morphology of astrocytes following chronic stress exposure. Methods: Thirty-two male rats were randomly divided into the 4 groups: (i) control, (ii) stress, (iii) honey, (iv) stress plus honey groups.TH was administered via oral gavage at dose of 1.0 g/kg body weight pre and post experiment. Chronic stress was exposed to animals in group (ii) and (iv) for consecutive 21 days. Anti GFAP immunohistochemistry method was employed to label astrocytes in the medial prefrontal cortex. The number of GFAP+ astrocytes and several parameters related to astrocyte processes were measured. Results: The present study showed that chronic stress reduced the GFAP immunoreactive astrocyte number and percentage of GFAP immunoreactive material. Chronic stress also caused a reduction in astrocyte process ramification as indicated by a reduction in astrocyte total number of processes, average length of processes and maximum number of intersections. However, antioxidant treatment using TH could not reverse these stress-induced changes to the astrocytes. Conclusion: These results demonstrate that chronic stress decreases the number of GFAP immunoreactive astrocyte and cause shrinking of astrocyte processes in stress-sensitive brain region, but these changes cannot be reversed by antioxidant treatment.

Introduction: Persistent exposure to stress can lead to a wide range of pathological effects, including reproductive dysfunctions. Tualang honey, renowned for its antioxidant properties has been utilised in traditional and modern medicine. This study aims to investigate the protective effects of Tualang honey against stress-induced testicular damage in male rats. Method: Twenty-four male rats were divided into control group, stress-exposed group, Tualang-honey-supplemented group and stress-exposed with Tualang-honey-supplemented group. Restraint stress test (RST) and Forced swimming test (FST) were imposed on the rats for 21 days. Serum testosterone and corticosterone concentration were measured using ELISA. Testes were harvested, weighed, processed and stained for spermatid counts and measuring seminiferous epithelial height and diameter. One-way analysis of variance (ANOVA) was used to compare the numerical data between groups. Results: The testosterone concentration, spermatid count, seminiferous epithelial height and diameter in stress group were significantly lower compared to control group (p < 0.05). Corticosterone concentration was significantly greater in the stress group than in the control group. The spermatid count and seminiferous epithelial height and diameter of honey-treated groups were significantly higher than the stress-only group (p < 0.05). The corticosterone concentration of honey-treated groups was significantly higher compared to the stress-only group. Meanwhile, the testosterone concentration of honey-treated groups was higher than the stress-only group although the results were insignificant. Conclusion: Tualang honey has the potential to ameliorate corticosterone concentration and induce morphological alterations by increasing spermatid counts and seminiferous epithelial thickness and diameter in rat testes exposed to prolonged stress.