The Administration of Topical Aloe vera Extract Reduce the Number of Sunburn Cells and Expression of Caspase-3 on Post UVB-light-exposure Epidermis

Abstract

Introduction: Ultraviolet B (UVB) radiation triggers the formation of free radicals that cause apoptosis and sunburn cells (SBC) formation. Aloe vera contains anti-inflammatory and antioxidant compounds that can potentially inhibit this process. Objective: to assess the effect of topical Aloe vera extract administration on the decrease of SBC number and Caspase-3 expression on the epidermis after UVB light exposure. Methods: In a post-test only group design study, a single dose of 3 doses of Erythema (DEM) was performed on two groups of 6 week old BALB/c female rats. Group A (control) did not receive any topical treatment, and group B (treatment) were smeared with 75% Aloe vera extract before irradiation. Each group was divided into 4 sub-groups based on post-exposure time of 6 hours (A1 and B1), 12 hours (A2 and B2), 24 hours (A3 and B3), and 48 hours (A4 and B4). The expression of caspase-3 was assessed by immunohistochemical staining while the SBC number was measured using a microscope. The expression of caspase-3 was analyzed using the Kruskal-Wallis and Mann-Whitney statistical tests, while the number of SBC was analyzed using the one-way ANOVA statistical test and the post-hoc LSD test. Results: The results of the Kruskal-Wallis analysis showed a significant difference in Caspase-3 expression between groups, p <0.05. The results of Mann-Whitney analysis showed a significant difference in Caspase-3 expression between the A1-A3 and B1-B3 subgroups (p <0.05). One-way ANOVA analysis showed a significant difference in the number of SBC between groups (p <0.05). Post-hoc LSD analysis showed significant differences in SBC counts between groups A and B across all subgroups, p <0.05. Conclusion: Topical application of Aloe Vera extract decreased Caspase-3 expression and the number of SBC in UVB light-exposed skin.

Effect of Four Antioxidants Combination on Number of Sertoli and Leydig Cells, Sperm Quality and Caspase-3 Expression in Rat Exposed to Cigarette Smoke

“…The combination of four antioxidants is able to ameliorate the damage, cell death, DNA mutation, replication errors, and genomic instability. This is in accordance with the research of (Soetrisno K, 2016) showing that Aloe vera extract, which contains various antioxidants, can reduce caspase-3 expression and the number of sunburn cells in the epidermis of rats exposed to UVB rays.…”