Li Xin-Yu, Liu Ying, Weng Sheng-Nan, Chen Wei, Ju Gao, Peng Chuan-Yue, Zhou Qiang, Yao Jie, Tang Wei
Department of Clinical Laboratory, The Second Affiliated Hospital of Anhui Medical University, Hefei, China.
Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.
Front Microbiol. 2025 Aug 13;16:1535506. doi: 10.3389/fmicb.2025.1535506. eCollection 2025.
The past few years have witnessed burgeoning interest in the potential beneficial role of probiotics in multiple fields. This study aimed to explore the probiotic properties and analyze the genomic information of the SHAMU-QH-02 strain, isolated from the human biliary tract. The SHAMU-QH-02 strain was identified using 16S rRNA gene and whole-genome sequencing. The strain exhibited antagonistic activity against most gram-positive cocci, gram-positive bacilli and gram-negative bacilli, especially foodborne pathogens, such as , , , , , , and . Antioxidant activity was assessed by ABTS scavenging assay and determination of ROS levels. Both the cell-free extract (CFE) and cell-free supernatant (CFS) of the SHAMU-QH-02 strain exhibited strong ABTS scavenging ability. Moreover, the CFS demonstrated a higher scavenging ability of ROS. Besides, the SHAMU-QH-02 strain could markedly decrease the production of interleukin-1β (IL-1β) in lipopolysaccharide (LPS)-stimulated RAW264.7 cells, indicating anti-inflammatory activity. Safety assessments indicated no cytotoxicity and susceptibility to 12 common antibiotics. Gastrointestinal stability assessment revealed high tolerance to intestinal pH and bile, yet limited ability to adhere to intestinal epithelial cells. Genomic analysis revealed the presence of hypothetical bacteriocin production genes ( = 2), virulence factor genes ( = 4), and antibiotic resistance genes ( = 23); however, none were located within the eight phage sequences. Importantly, the crude extract obtained using XAD-16HP resin could tolerate extreme pH values, 121°C, and multiple proteases. Taken together, the SHAMU-QH-02 strain exhibits probiotic attributes and presents as a notably promising probiotic candidate, potentially contributing to the food industry, health promotion and disease prevention.
在过去几年中,人们对益生菌在多个领域的潜在有益作用的兴趣迅速增长。本研究旨在探索从人胆道分离出的SHAMU-QH-02菌株的益生菌特性并分析其基因组信息。使用16S rRNA基因和全基因组测序对SHAMU-QH-02菌株进行鉴定。该菌株对大多数革兰氏阳性球菌、革兰氏阳性杆菌和革兰氏阴性杆菌表现出拮抗活性,尤其是对食源性病原体,如 、 、 、 、 、 和 。通过ABTS清除试验和活性氧水平测定评估抗氧化活性。SHAMU-QH-02菌株的无细胞提取物(CFE)和无细胞上清液(CFS)均表现出较强的ABTS清除能力。此外,CFS对活性氧的清除能力更高。此外,SHAMU-QH-02菌株可显著降低脂多糖(LPS)刺激的RAW264.7细胞中白细胞介素-1β(IL-1β)的产生,表明具有抗炎活性。安全性评估表明无细胞毒性且对12种常见抗生素敏感。胃肠道稳定性评估显示对肠道pH值和胆汁具有高耐受性,但粘附于肠道上皮细胞的能力有限。基因组分析揭示了假定的细菌素产生基因( = 2)、毒力因子基因( = 4)和抗生素抗性基因( = 23)的存在;然而,没有一个位于八个噬菌体序列内。重要的是,使用XAD-16HP树脂获得的粗提取物能够耐受极端pH值、121°C和多种蛋白酶。综上所述,SHAMU-QH-02菌株具有益生菌特性,是一个非常有前途的益生菌候选菌株,可能对食品工业、健康促进和疾病预防做出贡献。
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