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Hypocholesterolemic potential of Bacillus amyloliquefaciens KAVK1 modulates lipid accumulation on 3T3-L1 adipose cells and high fat diet-induced obese rat model

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Abstract

The significance of microorganisms occurring in foods is predominantly targeted due to their application for identifying a novel range of the bacterial spectrum. Diverse microbial species are capable of exhibiting potential pharmacological activities like antimicrobial and anticancer. Microbial strains capable of reducing obesity-related syndromes have also been reported. In the present study, the hypocholesterolemic efficacy of Bacillus amyloliquefaciens isolated from dairy products was scrutinised by in vitro (3T3-L1 adipose cells) and in vivo (high-fat diet-induced obese Wistar albino rats) methods. Potential cholesterol-lowering isolates were screened using a plate assay method and optimised by physical parameters. Molecular identification of the topmost five cholesterol-lowering isolates was acquired by amplification of the 16 S rRNA gene region. Bacillus amyloliquefaciens strain KAVK1, followed by strains KAVK2, KAVK3, KAVK4, and KAVK5 were molecularly determined. Further, cholesterol-lowering strains degraded the spectral patterns determined by the side chain of a cholesterol molecule. The anti-lipase activity was demonstrated using the porcine pancreatic lipase inhibitory method and compared with the reference compound Atorvastatin. Lyophilised strain KAVK1 revealed maximum pancreatic lipase inhibition. Strain KAVK1 attenuated lipid accumulation in 3T3-L1 adipose cell line predicted by Oil Red O staining method. Significant reduction of body weight and change in lipid profile was recognised after the supplement of KAVK1 to obese rats. Histopathological changes in organs were predominantly marked. The result of this study implies that the cholesterol-lowering B. amyloliquefaciens KAVK1 strain was used to treat hypercholesterolemia.

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Acknowledgements

AcknowledgementThis research work was supported by a fund from VISTAS, Vels University Research Grant (No: UP12G9520010.

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V.K: conceptualization, experimentation, literature collection, manuscript writing. K.A: Manuscript editing, review. S.KRN: supervision, manuscript writing, R.RK, R.S.AB, P.S: statistical analysis, image processing.

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Correspondence to S. Karthick Raja Namasivayam.

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The experimental protocol was sanctioned by the Institutional Animal Ethics Committee (IAEC), and the registration number was XVI/VELS/PCOL/09/2000/CPSEA/IAEC/25:11:14. Care of the animals taken as per the guidelines standards of the Committee for Control and Supervision of Experimental Animals (CPCSEA), Ministry of Environment and Forests, Government of India.

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The authors declare no competing interests.

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The authors assert that they have no known contending financial interests or personal associations that could have seemed to influence the work reported in this paper.

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Kokila, V., Namasivayam, S.K.R., Amutha, K. et al. Hypocholesterolemic potential of Bacillus amyloliquefaciens KAVK1 modulates lipid accumulation on 3T3-L1 adipose cells and high fat diet-induced obese rat model. World J Microbiol Biotechnol 40, 206 (2024). https://doi.org/10.1007/s11274-024-04016-9

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  • DOI: https://doi.org/10.1007/s11274-024-04016-9

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