Protective Effects of a <i>Brassica nigra</i> Sprout Hydroalcoholic Extract on Lipid Homeostasis, Hepatotoxicity, and Nephrotoxicity in Cyclophosphamide-Induced Toxicity in Rats

<b>Background:</b> <i>Brassica nigra</i> possesses a significant concentration of bioactive compounds and has been demonstrated to have a variety of pharmacological properties, although its sprout has not been extensively studied. Thus, the protective effects of <i>Brassica nigra</i> sprout hydroalcoholic extract (BNSE) on lipid homeostasis, hepatotoxicity, and nephrotoxicity in cyclophosphamide (CYP)-induced toxicity in rats were examined in this study. <b>Methods:</b> Four experimental rat groups (<i>n</i> = 8 for each group) were examined as follows: NR, normal rats that received normal saline by oral gavage daily; CYP, injected with a single dose of CYP at 250 mg kg⁻¹ intraperitoneally (i.p.) and did not receive any treatment, receiving only normal saline by oral gavage daily; CYP + BNSE250, injected with a single dose of CYP at 250 mg kg⁻¹ i.p. and treated with BNSE at 250 mg kg⁻¹ by oral gavage daily for three weeks; and CYP + BNSE500, injected with a single dose of CYP at 250 mg kg⁻¹ i.p. and treated with BNSE at 500 mg kg⁻¹ by oral gavage daily for three weeks. <b>Results:</b> The results indicated a significant increase (<i>p</i> < 0.05) in triglyceride (TG), cholesterol (CHO), low-density lipoprotein cholesterol (LDL-c), and very low-density lipoprotein cholesterol (VLDL-c) levels in CYP-induced toxicity rats. The administration of BNSE at 250 and 500 mg kg⁻¹ significantly (<i>p</i> < 0.05) attenuated TG, CHO, LDL-c, and VLDL-c at values comparable with the NR group. The most efficient treatment for improving the lipid profile and atherogenicity complication was BNSE at 500 mg kg⁻¹, performing even better than 250 mg kg⁻¹. Administrating BNSE at 250 or 500 mg kg⁻¹ improved the liver’s function in a dose-dependent manner. Comparing the lower dose of 250 mg kg⁻¹ of BNSE with 500 mg kg⁻¹ showed that administrating 250 mg kg⁻¹ attenuated alanine transaminase (ALT) by 28.92%, against 33.36% when 500 mg kg⁻¹ was given. A similar trend was observed in aspartate aminotransferase (AST), where 19.44% was recorded for BNSE at 250 mg kg⁻¹ and 34.93% for BNSE at 500 mg kg⁻¹. Higher efficiency was noticed for BNSE at 250 and 500 mg kg⁻¹ regarding alkaline phosphatase (ALP). An improvement of 38.73% for BNSE at 500 mg kg⁻¹ was shown. The best treatment was BNSE at 500 mg kg⁻¹, as it markedly improved liver function, such as total bilirubin (T.B.), in a dose-dependent manner. The administration of BNSE attenuated the total protein (T.P.), albumin, and globulin levels to be close to or higher than the typical values in NR rats. <b>Conclusions:</b> BNSE might be used for its promising hypolipidemic, hepatoprotective, and nephroprotective potential and to prevent diseases related to oxidative stress. Further research on its application in humans is highly recommended.