Ahmed Enam, Lee Ji-Eun, Hamayun Muhammad, Jung Selin, Kim Ho-Youn, Lee Bokyung
Department of Health Sciences, the Graduate School of Dong-A University, Busan, 49315, Republic of Korea.
Department of Food Science and Nutrition, Dong-A University, Busan, 49315, Republic of Korea.
Sci Rep. 2025 Aug 9;15(1):29222. doi: 10.1038/s41598-025-13364-x.
Cardiovascular diseases remain one of the leading causes of mortality among adults worldwide, with elevated blood lipid levels serving as a key modifiable risk factor. This study aimed to investigate the probiotic potential of lactic acid bacteria (LAB) isolated from ginseng sprouts (Panax ginseng Meyer) cultivated under smart-farming conditions, with a particular emphasis on their cholesterol-lowering properties. Out of 485 isolates, five strains of Lacticaseibacillus rhamnosus were selected based on superior in vitro performance and identified through 16 S rRNA sequencing and phylogenetic analysis. The selected strains demonstrated high tolerance to simulated gastrointestinal conditions (pH 3.0, 0.3% bile salts), with survival rates ranging from 98 to 99%. In addition, they exhibited robust antibacterial activity, notable antioxidant capacity and antibiotic susceptibility to erythromycin and clindamycin, while showed resistance to tetracycline and vancomycin. The selected bacterial strains reduced cholesterol levels by 30% as compared to the reference strain Lacticaseibacillus rhamnosus GG. Moreover, the formation of white precipitates around the bacterial colonies grown on media supplemented with 0.5% (w/v) TDCA and 0.37 g/L CaCl indicated elevated bile salt hydrolase (BSH) activity, corroborated by increased taurine release (15 mg/mL). Collectively, these findings highlight the safety and functional efficacy of the selected L. rhamnosus strains, supporting their potential application in cholesterol management as next-generation probiotics.
心血管疾病仍然是全球成年人死亡的主要原因之一,血脂水平升高是一个关键的可改变风险因素。本研究旨在调查从智能养殖条件下种植的人参芽(Panax ginseng Meyer)中分离出的乳酸菌(LAB)的益生菌潜力,特别关注其降低胆固醇的特性。在485株分离物中,基于优异的体外性能选择了5株鼠李糖乳杆菌,并通过16S rRNA测序和系统发育分析进行鉴定。所选菌株对模拟胃肠道条件(pH 3.0,0.3%胆盐)表现出高耐受性,存活率在98%至99%之间。此外,它们表现出强大的抗菌活性、显著的抗氧化能力以及对红霉素和克林霉素的抗生素敏感性,同时对四环素和万古霉素表现出抗性。与参考菌株鼠李糖乳杆菌GG相比,所选细菌菌株将胆固醇水平降低了30%。此外,在补充有0.5%(w/v)TDCA和0.37 g/L CaCl的培养基上生长的细菌菌落周围形成白色沉淀,表明胆盐水解酶(BSH)活性升高,牛磺酸释放增加(15 mg/mL)证实了这一点。总的来说,这些发现突出了所选鼠李糖乳杆菌菌株的安全性和功能功效,支持它们作为下一代益生菌在胆固醇管理中的潜在应用。
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