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Effect of Lacticaseibacillus paracasei Strain Shirota on Improvement in Depressive Symptoms, and Its Association with Abundance of Actinobacteria in Gut Microbiota
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Microorganisms
Volume 11
Issue 6
10.3390/microorganisms11061400
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Heczko, P.
Kozień, Ł.
Strus, M.
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Kozień, Ł.
Strus, M.
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Heczko, P.
Kozień, Ł.
Strus, M.
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Find support for a specific problem in the support section of our website. Get Support FeedbackPlease let us know what you think of our products and services. Give Feedback InformationVisit our dedicated information section to learn more about MDPI. Get Information clear JSmol Viewer clear first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing: Column Width: Background: Open AccessEditorial Special Issue “An Update on Lactobacillus”: Editorial by Piotr Heczko *, Łucja Kozień * and Magdalena Strus
Chair of Microbiology, Department of Bacteriology, Microbial Ecology and Parasitology, Jagiellonian University Medical College, 31-121 Cracow, Poland
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Authors to whom correspondence should be addressed.
Microorganisms 2023, 11(6), 1400; https://doi.org/10.3390/microorganisms11061400
Received: 23 February 2023
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Revised: 19 May 2023
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Accepted: 19 May 2023
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Published: 26 May 2023
(This article belongs to the Special Issue An Update on Lactobacillus)
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As indicated in the introduction to this Special Issue, as of 2020, the original genus Lactobacillus comprised over 260 recognized species, a figure which is probably much higher now. These species are extremely diverse at the phenotypic, ecological, and genotypic levels. Therefore, a new taxonomy within the Lactobacillaceae family has been proposed, and now the former genus Lactobacillus has been re-classified into 25 genera, with the addition of 23 novel genera. Fortunately for all researchers working on different questions related to medicine, nutrition, etc., the generic terms Lactobacillus and ‘lactobacilli’ will remain useful to designate all organisms that were classified as Lactobacillaceae until 2020 [1].Most of the evidence supporting the idea of the leading role of the Lactobacillus genus in the housekeeping of human and animal health derives from articles on probiotics aimed at elucidating the mechanisms of their functional activities. Therefore, the terms Lactobacillus and probiotic bacteria are often regarded as synonymous, which should be avoided in research articles. It is, of course, not possible to expand the data obtained in studies of probiotic strains regarding all of the Lactobacillus strains that are contact with human body surfaces and/or anchored in various ecological niches. It is, however, possible to speculate that many properties which have been attributed to the individual probiotic Lactobacillus may be a common characteristic of the whole species. Historically, probiotic lactobacilli were isolated at random from different niches of the healthy human microbiome and then characterized; therefore, it is highly probable that there are many Lactobacillus strains sharing the same properties as well-known probiotic strains that are active in the human microbiome but remain undetected/uncharacterized [2].Accumulating data demonstrate that the gut microbiome contributes to early-life imprinting, particularly through its effects on the developing immune system [3]. Although the underlying molecular mechanisms of this neonatal priming period in humans have not been defined, thanks to new animal experiments, there are new data showing that the mechanisms of acquiring the gut microbiota in infancy depend on interactions between bacterial and host factors. This suggests that the timing of bacterial arrival in the gut is very important in shaping the gut microbiome. This is the case for the Lactobacillus bacteria: they form the dominant part of the vaginal microbiota in the late period of pregnancy, but they are also present in high numbers in human milk [4]. Thus, lactobacilli numerically overshadow all other genera, including Bifidobacterium, in colonizing neonatal mucosal and skin surfaces at birth during passage though the vagina and its Lactobacillus-rich microbiota, and then after labour during feeding, with the mother’s breast milk containing high numbers of lactobacilli [5]. Thus, proper timing and proper bacteria are the crucial factors that may determine the successful artificial colonization of neonates at risk [6]. In spite of a large number of randomized placebo-controlled clinical trials and observational cohort studies including more than 50,000 preterm infants from 29 countries that have demonstrated a decrease in the risk of necrotizing enterocolitis, death, and sepsis, routine prophylactic probiotic administration to preterm infants remains uncommon in much of the world [7]. An article published in this Special Issue presents new data regarding the successful colonization of extremely preterm neonates after supplementation with a new strain of Limosilactobacillus reuteri [8], although this species was previously considered as less colonization-efficient in comparison with others [9].On the contrary to the above, Lacticaseibacillus paracasei strain Shirota has been the object of over 500 scientific studies and is considered as one of the most researched probiotic strains, originally selected in 1930 by Doctor Minoru Shirota, and fully characterized and commercialized about twenty years later. The discovery of the gut–brain axis prompted researchers to study its mechanisms and the effectiveness of Lactobacillus probiotics in ameliorating depressive symptoms. The gut–brain axis refers to bidirectional communication between the brain and the gut, and is related to alterations in the gut microbiota composition [10]. Furthermore, L. paracasei Shirota strain was also investigated in clinical studies to check its anti-depressive activity [11]. The intervention-associated reduction in depressive symptoms was associated with the gut microbiota, and was more pronounced when Bifidobacterium and Atopobium clusters of the Actinobacteria phylum were maintained at higher counts. It is well documented that the human vaginal microbiota is composed of several dozens of bacterial species, with a distinct predominance of several Lactobacillus strains efficiently controlling the remaining members of the microbiota by direct means, i.e., the production of lactic and other acids able to kill other bacteria [12,13]. However, it is not yet known if and how the dominant lactobacilli control atypical bacteria that are not members of the microbiota and invade the vagina as result of sexual contacts, as Chlamydia trachomatis does [14]. The literature on this subject is rather scanty and different mechanisms are proposed: the induction of anti-inflammatory cytokines [15] or the expression of α5β1 integrin in cervical cells [16], and more recently, the production of biosurfactant by Lactobacillus crispatus, as published and presented in this Special Issue [17]. There is also a rapidly accumulating bulk of the literature that is focused on lactobacilli in human and animal foods; in fact, this large research area is also strictly related to health, and contains important and valuable information for industry both in the technological and economic sense. Thus, it is worth indicating here that Lactobacillaceae are the most often domesticated bacteria for nourishment. During the domestication process, microbes gained the capacity to efficiently consume particular nutrients, cope with a multitude of industry-specific stress factors, and produce desirable compounds, often at the cost of a reduction in fitness in their original, natural environments [18]. Historically, lactobacilli fermenting a practically unlimited varieties of plants, dairy products, fish, and meat were recognized as useful bacteria just after the discovery of the microbial world in the last century. In this way, examples such as the domesticated yoghurt producer Lactobacillus delbrueckii ssp. bulgaricus or the meat- and fish-fermenting Latilactobacillus sakei were discovered and characterized [19,20]. Discoveries of new domesticated Lactobacillus species are announced continuously. Moreover, the availability of whole-genome sequencing data, combined with an expansive experimental toolbox, allows researchers to generate novel, superior variants in the laboratory [18]. A very good example of this new approach to the domestication of the industrially important Lactiplantibacillus plantarum is presented in this Special Issue [21]. This example shows that although L. plantarum bacteria does not readily utilize plant fructo-oligosaccharides, they may create them efficiently in the presence of cranberry polyphenols. This may provide next-generation synergistic symbiotic approaches that incorporate adjunct substrates such as cranberry polyphenols. Cranberries are often used in polyphenol-enriched food products, which have been reported to be effective in addressing obesity, inflammation, and cardiovascular disease, and more specifically have been included in dietary supplements used to prevent urinary tract infections, since they inhibit the adhesion of uropathogenic Escherichia coli to the urinary epithelium [22].
Author ContributionsConceptualization, P.H. and M.S.; software, Ł.K.; resources, Ł.K.; writing—original draft preparation, P.H.; writing—review and editing, Ł.K.; supervision, M.S. All authors have read and agreed to the published version of the manuscript. Data Availability StatementNot applicable.Conflicts of InterestThe authors declare no conflict of interest.ReferencesZheng, J.; Wittouck, S.; Salvetti, E.; Franz, C.M.A.P.; Harris, H.M.B.; Mattarelli, P.; O’toole, P.W.; Pot, B.; Vandamme, P.; Walter, J.; et al. A Taxonomic Note on the Genus Lactobacillus: Description of 23 Novel Genera, Emended Description of the Genus Lactobacillus Beijerinck 1901, and Union of Lactobacillaceae and Leuconostocaceae. Int. J. Syst. Evol. Microbiol. 2020, 70, 2782–2858. [Google Scholar] [CrossRef] [PubMed]O’Callaghan, J.; O’Toole, P.W. Lactobacillus: Host-Microbe Relationships. Curr. Top. Microbiol. Immunol. 2013, 358, 119–154. 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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
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Heczko, P.; Kozień, Ł.; Strus, M. Special Issue “An Update on Lactobacillus”: Editorial. Microorganisms 2023, 11, 1400. https://doi.org/10.3390/microorganisms11061400 AMA StyleHeczko P, Kozień Ł, Strus M. Special Issue “An Update on Lactobacillus”: Editorial. Microorganisms. 2023; 11(6):1400. https://doi.org/10.3390/microorganisms11061400 Chicago/Turabian StyleHeczko, Piotr, Łucja Kozień, and Magdalena Strus. 2023. "Special Issue “An Update on Lactobacillus”: Editorial" Microorganisms 11, no. 6: 1400. https://doi.org/10.3390/microorganisms11061400 Find Other Styles Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here. Article Metrics No No Article Access Statistics For more information on the journal statistics, click here. Multiple requests from the same IP address are counted as one view. Zoom | Orient | As Lines | As Sticks | As Cartoon | As Surface | Previous Scene | Next Scene Cite Export citation file: BibTeX | EndNote | RIS MDPI and ACS StyleHeczko, P.; Kozień, Ł.; Strus, M. Special Issue “An Update on Lactobacillus”: Editorial. Microorganisms 2023, 11, 1400. https://doi.org/10.3390/microorganisms11061400 AMA StyleHeczko P, Kozień Ł, Strus M. Special Issue “An Update on Lactobacillus”: Editorial. Microorganisms. 2023; 11(6):1400. https://doi.org/10.3390/microorganisms11061400 Chicago/Turabian StyleHeczko, Piotr, Łucja Kozień, and Magdalena Strus. 2023. "Special Issue “An Update on Lactobacillus”: Editorial" Microorganisms 11, no. 6: 1400. https://doi.org/10.3390/microorganisms11061400 Find Other Styles Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here. clear Microorganisms, EISSN 2076-2607, Published by MDPI RSS Content Alert Further Information Article Processing Charges Pay an Invoice Open Access Policy Contact MDPI Jobs at MDPI Guidelines For Authors For Reviewers For Editors For Librarians For Publishers For Societies For Conference Organizers MDPI Initiatives Sciforum MDPI Books Preprints.org Scilit SciProfiles Encyclopedia JAMS Proceedings Series Follow MDPI LinkedIn Facebook Twitter
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