Stress tolerance-Bacillus with a wide spectrum bacteriocin as an alternative approach for food bio-protective culture production

To, Hoang Truc Anh; Chhetri, Vishal; Settachaimongkon, Sarn; Prakitchaiwattana, Cheunjit

doi:10.1016/j.foodcont.2021.108598

Cited by 12 publications

(8 citation statements)

References 137 publications

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“…Considering, the AMPs from different strains of Bacillus sp. are used as potential next-generation antibiotics substitutes as revealed in different recent research programs [ 48 ], where many of them show very functional properties even under stressful circumstances such as rude temperatures, the existence of chemical substances and pH [ 49 ]. Considering the aforementioned information, this study aimed to deal with the novel bacteriocin-producing B. cereus , isolated from buffalo milk through comprehensive subcultures and characterization.…”

Section: Discussionmentioning

confidence: 99%

Molecular identification, characterization, and antagonistic activity profiling of Bacillus cereus LOCK 1002 along with the in-silico analysis of its presumptive bacteriocins

Islam¹,

Farjana²,

Uddin³

et al. 2022

J Adv Vet Anim Res

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Objectives: This research aimed to isolate, identify, and characterize a new strain of Bacillus cereus through different molecular biology approaches so that it could be further studied for therapeutic purposes against selective enteric pathogens. Materials and Methods: Pure isolates of B. cereus were prepared from buffalo yogurt samples in REMBA medium. Initially, the morphological, physiological, and biochemical properties were studied accordingly. Following the tests, the molecular identification for the strain identification was conducted through plasmid DNA extraction, PCR, agarose gel electrophoresis, and 16S rRNA sequencing up to 1.37 kb. Afterward, the antibiotic sensitivity [Epsilometer test (E-Test)] and anti¬fungal activity were tested considering different concentrations. Being classified from the aforementioned tests, a comprehensive antimicrobial activity test was conducted using the cell-free-su¬pernatant (CFS) of the test strain against selective enteric pathogens in humans in vitro. Besides, the different clusters of genes were identified and characterized for understanding the presump¬tive bacteriocins present in the CFS of the strain in silico, where molecular string properties were calculated. Finally, the evolutionary relationship among diversified bacteriocins synthesized by different Bacillus strains was studied to predict the CFS-containing bacteriocins of the new strain. Results: Purified isolates of B. cereus were Gram-positive rods and showed significant tolerance (p < 0.0001) to different concentrations of pH, phenol, bile salt, and NaCl. 16S rRNA revealed the strain as LOCK 1002, which was strongly sensitive to all the antibiotics used and resistant to selec¬tive antifungal agents. The CFS of B. cereus LOCK 1002 was found to be a very promising antago¬nist to all the enteric pathogens used in the culture condition. Two gene clusters were predicted to be interconnected and responsible for different presumptive bacteriocins. Conclusion: The newly identified LOCK 1002 can be a very potent strain of B. cereus in use as an antimicrobial agent for having different bacteriocin coding gene clusters.

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Section: Discussionmentioning

confidence: 99%

Molecular identification, characterization, and antagonistic activity profiling of Bacillus cereus LOCK 1002 along with the in-silico analysis of its presumptive bacteriocins

Islam¹,

Farjana²,

Uddin³

et al. 2022

J Adv Vet Anim Res

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“…Bacillus species are endospore-forming and rod-shaped bacteria, which are either aerobic or facultative anaerobe. Many species exhibit a wide range of physiological traits, which enable their survival in a diverse natural environment ( 1 ). Bacillus velezensis was formerly classified as strains of Bacillus amyloliquefaciens but reclassified based on genomic analysis ( 2 , 3 ).…”

Section: Announcementmentioning

confidence: 99%

Draft genome sequence of Bacillus velezensis strains AOA1 and AKS2, the potential plant growth-promoting rhizobacteria

Babalola,

Akanmu,

Ayangbenro

2024

Microbiol Resour Announc

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This report describes the draft genome sequence of Bacillus velezensis strains AOA1 and AKS2 isolated from maize rhizosphere soil in South Africa. Bacillus velezensis plays important biological roles as plant growth promoting rhizobacterium (PGPR). Bacillus velezensis strains also exhibit numerous biotechnological application potentials in agriculture and diverse industrial settings.

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“…Signaling regulates the behavior of enteric microbes responsible for infections and colonization inside the host. Lactobacillus releases a molecule that constrains signaling of quorum sensing, directly interacts with signaling, or directly interacts with the E. coli O157 gene of bacterial transcription responsible for colonization [ 38 , 41 , 42 , 43 , 44 ]. Moreover, probiotic bacteria express their immunomodulatory action by interrelating with epithelial, dendritic cells, monocytes/macrophages, and lymphocytes [ 45 ].…”

Section: Probiotic Isolates and Their Health Advantagesmentioning

confidence: 99%

Pharmacological Efficacy of Probiotics in Respiratory Viral Infections: A Comprehensive Review

Wahab

Almaghaslah

Mahmood

et al. 2022

JPM

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Mortality and morbidity from influenza and other respiratory viruses are significant causes of concern worldwide. Infections in the respiratory tract are often underappreciated because they tend to be mild and incapacitated. On the other hand, these infections are regarded as a common concern in clinical practice. Antibiotics are used to treat bacterial infections, albeit this is becoming more challenging since many of the more prevalent infection causes have acquired a wide range of antimicrobial resistance. Resistance to frontline treatment medications is constantly rising, necessitating the development of new antiviral agents. Probiotics are one of several medications explored to treat respiratory viral infection (RVI). As a result, certain probiotics effectively prevent gastrointestinal dysbiosis and decrease the likelihood of secondary infections. Various probiotic bacterias and their metabolites have shown immunomodulating and antiviral properties. Unfortunately, the mechanisms by which probiotics are effective in the fight against viral infections are sometimes unclear. This comprehensive review has addressed probiotic strains, dosage regimens, production procedures, delivery systems, and pre-clinical and clinical research. In particular, novel probiotics’ fight against RVIs is the impetus for this study. Finally, this review may explore the potential of probiotic bacterias and their metabolites to treat RVIs. It is expected that probiotic-based antiviral research would be benefitted from this review’s findings.

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Stress tolerance-Bacillus with a wide spectrum bacteriocin as an alternative approach for food bio-protective culture production

Cited by 12 publications

References 137 publications

Molecular identification, characterization, and antagonistic activity profiling of Bacillus cereus LOCK 1002 along with the in-silico analysis of its presumptive bacteriocins

Molecular identification, characterization, and antagonistic activity profiling of Bacillus cereus LOCK 1002 along with the in-silico analysis of its presumptive bacteriocins

Draft genome sequence of Bacillus velezensis strains AOA1 and AKS2, the potential plant growth-promoting rhizobacteria

Pharmacological Efficacy of Probiotics in Respiratory Viral Infections: A Comprehensive Review

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