Abstract
In this study, ten strains of lactic acid bacteria were isolated from the intestine of Blainville's beaked whale (Mesoplodon densirostris),and their cholesterol-lowering activities in vitro and in vivo were investigated. The among these strains, HJ-S2 strain, which identified as Lactiplantibacillus plantarum, showed a high in vitro cholesterol-lowering rate (48.82%). Strain HJ-S2 was resistant to acid and bile salts, with a gastrointestinal survival rate of more than 80%, but was sensitive to antibiotics. Strain HJ-S2 was found to be able to adhere to HT-29 cells in an adhesion test. The number of cell adhesion was 132.52. In addition, we also performed the cholesterol-lowering activities in vivo using high-fat diet feed mouse models. Our results indicated that HJ-S2 reduced total cholesterol (TC), total glycerol (TG), and low-density lipoprotein cholesterol (LDLC) levels while increasing the high-density lipoprotein cholesterol (HDLC) level. It also alleviated the lipid accumulation in high-fat diet feed mouse liver and pancreas. Hence, HJ-S2 demonstrated appropriate cholesterol-lowering ability and has the potential to be used as a probiotic in functional foods.
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Data Availability
The data that support the findings of this study are available from the corresponding author, [Xu Tang], upon reasonable request.
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Funding
This study was supported by the Natural Science Foundation of Fujian Province of China (2020J01103) and Xiamen Southern Oceanographic Center (21CZP003HJ13).
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JW and PW performed the experiments equally; JW wrote the original draft preparation; PW and XT revised the main manuscript text; JH and SH prepared Figs. 1–6 and Table 1–5. JH, SH and QH provided technically support for the study; and XT supervised and managed the study. All authors read and approved the final manuscript.
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Wan, J., Wu, P., Huang, J. et al. Characterization and evaluation of the cholesterol-lowering ability of Lactiplantibacillus plantarum HJ-S2 isolated from the intestine of Mesoplodon densirostris. World J Microbiol Biotechnol 39, 199 (2023). https://doi.org/10.1007/s11274-023-03637-w
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DOI: https://doi.org/10.1007/s11274-023-03637-w