Skip to main content

Enhancement of intestinal epithelial barrier function by Weissella confusa F213 and Lactobacillus rhamnosus FBB81 probiotic candidates in an in vitro model of hydrogen peroxide-induced inflammatory bowel disease



Weissella confusa F213 (WCF213) and Lactobacillus rhamnosus FBB81 (LrFBB81) are two probiotic candidates isolated from humans in our previous study. Their functional activity on the mucosal barrier has not yet been adequately investigated. Therefore, the objective of this study was to investigate the effect of these strains on maintaining mucosal integrity in vitro. Caco-2 cell monolayers were pretreated with WCF213 and LrFBB81 before being exposed to hydrogen peroxide. The integrity of mucosal cells was evaluated by measuring the transepithelial resistance (TER), flux of FITC-labelled dextran, and ZO-1 protein distribution with the help of an immunofluorescence method.


WCF213 was found to significantly maintain the TER better than the control hydrogen peroxide-treated cells (p < 0.001), followed by the strain combination, and LrFBB81 alone (p < 0.05). The permeability of mucosa was also successfully maintained by the WCF213 strain. This was illustrated by the significant reduction in the flux of FITC-labelled dextran (p < 0.05), which was larger than that exhibited by the other groups. The ZO-1 distribution of strain-treated cells showed less disruption than hydrogen peroxide-treated cells, consistent with the TER and FITC experimental results. These findings indicate that WCF213 and LrFBB81 plays important roles in the maintenance of mucosal integrity in a strain-dependent manner.


The gut mucosa plays roles in protecting against luminal contents, including pathogens, and acts as a selective barrier for nutrients, water, etc. Impairment of gut barrier function occurs in gut disorders such as inflammatory bowel diseases (IBD). IBD is mostly prevalent in developed countries; however, it has recently become more common in Asia [1]. IBD is shown as a disruption of tight junctions (TJs), attenuation of epithelial resistance and increased permeability of epithelial cells due to localization or disruption of TJ protein [2]. Reactive oxygen species (including hydrogen peroxide/H2O2) are one of proinflammatory factors that can disrupt TJs and increase the permeability of gut mucosa. Factors that prevent inflammatory-mediated TJ disruption and improve gut mucosal permeability will have beneficial effects on many gastrointestinal tract diseases, including IBD. Several studies concluded that probiotics play an anti-inflammatory role by modifying the intestinal environment and subsequently reducing the severity of intestinal inflammation associated with IBD [3, 4]. Probiotics are living microorganisms that, when administered in adequate amounts, confer a health benefit on the host [5, 6]. The source of microorganisms for probiotics used in humans mainly originates from the human body, such as breast milk and faecal materials, or is cultivated from fermented dairy products that serve as human foods [7]. Lactobacillus spp. and Bifidobacterium spp. are two genera of lactic acid bacteria (LAB) used in the majority of probiotic products [8]; however, there are next-generation probiotic candidate species such as Akkermansia muciniphila [9] and Faecalibacterium prausnitzii [10]. The prominent health benefit of probiotics derives from their ability to create more favourable gut microbial niches, thereby maintaining a normal physiology of the digestive tract [6]. Any potential benefits of probiotics on the immune system, gut-brain axis, and other extraintestinal sites are considered species- or strain-specific features [6]. Recently, we isolated promising probiotic strains Weissella confusa F213 (WCF213) and Lactobacillus rhamnosus FBB81 (LrFBB81) from healthy infant faeces [11]. These two strains belong to different genera of lactic acid bacteria [12]. The latter is commonly applied as a probiotic [11], but the former has been gaining interest since this genus has a long history associated with fermented food in European sourdoughs and Korean kimchi [13,14,15]. Thus, the beneficial effects of W. confusa should be further investigated. Molecular identification of WCF213 and LrFBB81 has been performed based on 16S rDNA sequencing [11, 16]. Both of these strains have been known to have probiotic properties such as resistance to the gastrointestinal environment [11, 16], attachment to the Caco-2 cell monolayer [17], and antioxidant activity [18]. Both strains did not show haemolysis on blood agar plates [19] and did not translocate through Caco-2 monolayers [20]. WCF213 and LrFBB81 have been shown to be resistant to penicillin and vancomycin [17]; however, the vancomycin resistance was attributed to this resistance being an intrinsic factor of most lactic acid bacteria used as probiotics [21, 22]. Based on the abovementioned results, we considered WCF213 and LrFBB81 to be safe. However, their functional effect on mucosal integrity has not yet been investigated. We speculated that these two strains applied individually or in combination would protect the mucosal integrity from H2O2-induced disruption, mimicking IBD in vitro. Therefore, the aim of this study was to evaluate the protective effect of WCF213 and LrFBB81 on mucosal integrity in vitro.

Main text


Preparations of bacterial cells

WCF213 and LrFBB81, human origin-lactic acid bacteria strains that exhibit probiotic properties, were used in this study. A single strain with a cell density of 1 × 109 CFU/ml or a combination of WCF213 and LrFBB81 (final cell density of 1 × 109 CFU/ml for each strain) was used for the probiotic-treatment group. The bacteria were cultured in de Mann Rogosa Sharpe (MRS) agar plates (Oxoid, Basingstoke, UK) at 37 °C for 18 h under anaerobic conditions. These overnight-incubated bacterial suspensions were centrifuged at 13,000 rpm at 4 °C for 5 min. The bacterial pellets were then resuspended in Dulbecco’s modified Eagles medium (DMEM) (Fujifilm, Wako Pure Chemical Industries, Ltd., Osaka, Japan) without foetal bovine serum (FBS) according to the designated concentration.

Caco-2 cell lines

Caco-2 cells were passaged in DMEM with 20% FBS (Fujifilm, Wako Pure Chemical Industries, Ltd., Osaka, Japan). After passage, the cells (4 × 104 cells/ml) were seeded onto 0.4-μm Transwell inserts (Corning ® Inc., Corning, NY, USA) that had been pre-coated with collagen type 1 (Corning ® Inc., Corning, NY, USA) and maintained at 37 °C under a 5% CO2 humidified air atmosphere. The medium was changed every 2–3 times per week.

Reagent for membrane disruption

H2O2 in DMEM without FBS was used as a TJ disruption agent.

Transepithelial resistance (TER) assay

The transepithelial resistance (TER) experiment used in this study (with slight modifications) has been published [20, 23]. TER was measured by using a Millicell ERS2 voltohmmeter (Merck, Millipore, Billerica, MA, USA). All cell media was changed with FBS-free DMEM before treatment. Cells were pretreated with a single strain or combination strains (treatment group) or DMEM only (control group) by adding the treatment to the apical surface of the cells. After 2 h of pretreatment, H2O2 was added to the basolateral side (final concentration 25 mM) and incubated for 4 h at 37 °C and 5% CO2. The TER was then measured.

Flux of fluorescein isothiocyanate (FITC)-labelled dextran (permeability assay)

Caco-2 cells were pretreated with WCF213, LrFBB81 or their combination for 2 h before being treated with H2O2 (treatment group) or DMEM only (control group) for 4 h. Then, 10 kDa fluorescein isothiocyanate (FITC)-labelled dextran (Nacalai Tesque, Kyoto, Japan) (final concentration 10 μM) was applied to the apical side and incubated for 3 h. Basolateral medium was collected and assayed in triplicate. The permeability of the monolayers was measured as the flux of FITC-labelled dextran from the apical chamber into the basolateral chamber and measured at 485/538 nm (excitation/emission) using a fluorometer (Ascent Fluoroscan, Thermo Scientific, Rockford, USA).

Caco-2 zona occludens-1 (ZO-1) immunofluorescence

The presence of zona occludens-1 (ZO-1) protein was detected using immunofluorescence as described elsewhere (with some modifications) [20]. Fourteen days post-confluence Caco-2 cells (4 × 104 cells/ml) seeded onto collagen type I-coated flexiPERM® (SARSTEDT AG & Co.KG, Numbrecht, Germany) were pretreated with WCF213 or LrFBB81 or their combination for 2 h and then treated with H2O2 (final concentration 25 mM) for 4 h. After incubation with H2O2, the slides were fixed with 4% paraformaldehyde in PBS for 15 min, and then washed with PBS-Tween. The cells were blocked with Blocking One Histo (Nacalai Tesque, Kyoto) and incubated for 15 min at room temperature. After washing with PBS-Tween, the specific primary antibody, ZO-1 anti-rabbit monoclonal antibody (rabbit monoclonal antibody, cat no. ab96594, Abcam) in Blocking One (Nacalai Tesque, Kyoto, Japan) and PBS-Tween were added into each well, and the plate was incubated at 4 °C, overnight. After washing with PBS-Tween, secondary antibody consisting of Alexa Fluor™ 488-goat anti-rabbit IgG (Invitrogen, Carlsbad, CA) in blocking buffer was added into the wells. The distribution of ZO-1 protein was observed as fluorescence that was visualized via fluorescence microscopy (60× oil immersion) (Biozero, Keyence, Japan). The images (60×) are representative of 10 images taken for each condition in three experiments.

Statistical analysis

All experiments were performed in triplicate, except where otherwise indicated. All data are presented as the mean ± SD unless otherwise specified. Statistical analysis (independent t test) was performed using IBM SPSS software (version 25.0, Chicago, USA). P-values less than 0.05 were considered statistically significant.


Weissella confusa F213 and Lactobacillus rhamnosus FBB81 Enhanced Mucosal Barrier Resistance in an in vitro Caco-2 Cell Model of IBD

In this study, the effects of WCF213 and LrFBB81 on mucosal integrity in vitro were evaluated. As shown in Fig. 1, H2O2 effectively decreased the TER, indicating that H2O2 induced Caco-2 cell barrier disruption. Pretreatment with these strains, either individually or in combination, successfully diminished the H2O2-induced disruption effect on the barrier resistance of Caco-2 cell models compared with that non-strain-treated cells. Specifically, WCF213 significantly protected mucosal integrity (p < 0.001), better than LrFBB81 or the strain combination (p < 0.05) (Additional File 1: Table S1).

Fig. 1

Single strain (WCF213 or LrFBB81) and combination strains pretreatment helped in maintaining mucosal integrity against H2O2 exposure. Caco-2 cells pretreated with either individual or combination strains significantly maintained TER as compared to that treated only with H2O2. WCF213 showed better effect on maintaining mucosal integrity (p < 0.001) than LrFBB81 or combination did. (Combination, Weissella confusa F213 and Lactobacillus rhamnosus FBB81; asterisks denote a significant difference with H2O2; Data are means of three experiments ± SD; **p < 0.001; *p < 0.05)

Weissella confusa F213 and Lactobacillus rhamnosus FBB81 decreased permeability in an in vitro Caco-2 cell model of IBD

Paracellular permeability of Caco-2 cells was measured by flux of FITC dextran (MW 10,000) into the basolateral chamber. The flux of FITC-labelled dextran was lower in the strain-treated Caco-2 cell monolayer; in particular, the flux of FITC-labelled dextran in Caco-2 cells pretreated with WCF213 was significantly lower (p < 0.05) than that in the other groups (Fig. 2), indicating that the strains (single or combination strains) could reduce the permeability induced by H2O2, suggesting the prevention of mucosal membrane disruption (Additional File 1: Table S2).

Fig. 2

Individual strain (WCF213 or LrFBB81) and combination strains (WCF213 and LrFBB81) pretreatment aided in maintaining mucosal integrity against H2O2 exposure. Caco-2 cells pretreated with WCF213 significantly reduced of FITC dextran flux into basolateral (p < 0.05) as compared to that treated only with H2O2. (Combination; Weissella confusa F213 and Lactobacillus rhamnosus FBB8; asterisk denotes a significant difference with H2O2; Data are means of three experiments ± SD; *p < 0.05)

Weissella confusa F213 and Lactobacillus rhamnosus FBB81 stabilized the tight junction protein in an in vitro Caco-2 cell model of IBD

This study revealed that the strain-treated group showed more stable ZO-1 protein than the group treated with H2O2 only. In line with the TER and FITC experimental results, WCF213 was better at maintaining the stabilization of the ZO-1 protein than LrFBB81, the strain combination or H2O2 only (Fig. 3).

Fig. 3

Single strain (WCF213 or LrFBB81) and combination strains (WCF213 and LrFBB81) pretreatment helped in maintaining mucosal integrity against H2O2 exposure. Caco-2 cells were untreated (control; a), treated with H2O2 only (b) and pretreated with probiotics strains (WCF213 (c), LrFBB81 (d), and combination (e) for 2 h, 37 °C, 5% CO2 before TJ disruption with 25 mM H2O2 for 4 h. ZO-1 tight junction protein was detected using immunofluorescence. ZO-1 protein of Caco-2 cells pretreated with probiotics strains (c, d, e) was maintained much better than that treated only with H2O2 (b). Cells that treated with hydrogen peroxide showed loss of their tight junction as shown as arrowheads (b) (observation 60× oil immersion, 10 microscope field of each treatment)


The intestinal mucosa barrier is composed of epithelial cells, the TJs between the cells, and the mucus layer [24]. Proinflammatory factors, including reactive oxygen species, damage the mucosal barrier, leading to increased paracellular permeability. Intestinal epithelial barrier dysfunction and increased permeability have been described in patients with IBD [25], which is known as dysbiosis and inflammation of the gut mucosa [26, 27]. Probiotics play a potential role not only in maintaining the composition of the microbiota but also in promoting gut mucosal integrity [28]. In the present study, we evaluated the effects of our probiotic candidate strains, WCF213 and LrFBB81, on mucosal injury caused by H2O2-induced oxidative stress in a Caco-2 cell monolayer, an in vitro model of intestinal epithelium. These strains, individually or in combination, remarkably maintained the TER, decreased the permeability, and stabilized the ZO-1 protein location at intercellular junctions. A previous study conducted by Zyrek et al. (2007) found that E. coli Nissle 1917, a probiotic strain, successfully enhanced transepithelial resistance in an in vitro model. The authors found that E. coli Nissle 1917 restored the barrier function of T84 cells after enteropathogenic E. coli (EPEC) infection [29]. A study using proteins produced by L. rhamnosus GG (LGG), p40 and p75, showed the protective effect of both proteins on mucosal integrity disruption induced by reactive oxygen species, H2O2. These proteins successfully diminished the decrease in TER after H2O2 exposure and reduced inulin flux into the basolateral membrane, which indicated that LGG treatment ameliorated the H2O2-induced disruption of TJ protein and mucosal permeability. These authors suggested that the protective mechanisms of these proteins were through protein kinase C (PKC) and mitogen-activated protein (MAP)-kinase activation [30]. A study conducted by Blackwood et al. (2017) reported that L. rhamnosus and L. plantarum significantly protected the Caco-2 cells from lipopolysaccharide (LPS)- and ethyleneglycoltetraacetic acid (EGTA)-induced disruption [23]. All these studies illustrate the potential effects of certain probiotic strains on the maintenance of mucosa integrity. Soluble peptides excreted by probiotic strains may be involved in mucosal protection against disruption agents including pathogenic microorganisms and their toxic substances. Short-chain fatty acids (SCFAs), including butyrate, produced by probiotic strains have beneficial effects on intestinal mucosa related to the proliferation and maturation of epithelium and an increase in the vascular supply, which aid in mucosal repair and play a role in TJ assembly [24, 31]. In conclusion, this study showed that WCF213 and LrFBB81 ameliorate the H2O2-induced disruption of intestinal epithelial TJs and decrease epithelial permeability; therefore, this probiotic candidate treatment represents a promising adjuvant for IBD management (Additional file 1).


Further investigation into the mechanism underlaying the protective effect of WCF213 and LrFBB81 on H2O2-induced mucosal injury is of interest. In this study, the strain combination showed less effectiveness on mucosal integrity than WCF213 alone. Since the effects of the probiotics were both dose and strain dependent, further studies should be conducted to optimize the dose of each strain in this combination.

Availability of data and materials

All data generated or analyzed during this study are included in this published article (and its additional file).



Weissella confusa F213


Lactobacillus rhamnosus FBB81


Transepithelial resistant


Fluorescein isothiocyanate


Zona occludens-1


Inflammatory bowel diseases


Tight junctions


De Mann, Rogosa, and Sharpe


Foetal bovine serum


Dulbecco’s modified Eagle’s medium




Protein kinase C


Mitogen-activated protein kinase


Short-chain fatty acids


Ethyleneglycoltetraacetic acid


  1. 1.

    Molodecky NA, Soon S, Rabi DM, Ghali WA, Ferris M, Chernoff G, et al. Increasing incidence and prevalence of the inflammatory bowel diseases with time, based on systematic review. Gastroenterology. 2012;142(1):46–54.

    Article  Google Scholar 

  2. 2.

    Baumgart DC, Carding SR. Inflammatory bowel disease: cause and immunobiology. Lancet. 2007;369(9573):1627–40.

    CAS  Article  Google Scholar 

  3. 3.

    Scaldaferri F, Gerardi V, Lopetuso LR, DelZompo F, Mangiola F, Boškoski I, et al. Gut microbial flora, prebiotics, and probiotics in IBD: their current usage and utility. Biomed Res Int. 2013;2013:435268.

    Article  Google Scholar 

  4. 4.

    Shanahan F. Probiotics in inflamatory bowel disease. Gut. 2001;48(5):609.

    CAS  Article  Google Scholar 

  5. 5.

    Health and nutritional properties of probiotics in food including powder milk with live lactic acid bacteria. [Internet]. Joint FAO/WHO Expert Consultation on Evaluation of Health and Nutritional Properties of Probiotics in Food Including Powder Milk with Live Lactic Acid Bacteria. 2001.

  6. 6.

    Hill C, Guarner F, Reid G, Gibson GR, Merenstein DJ, Pot B, et al. Expert consensus document. The International Scientific Association for Probiotics and Prebiotics consensus statement on the scope and appropriate use of the term probiotic. Nat Rev Gastroenterol Hepatol. 2014;11(8):506–14.

    Article  Google Scholar 

  7. 7.

    Sornplang P, Piyadeatsoontorn S. Probiotic isolates from unconventional sources: a review. J Anim Sci Technol. 2016;58(1):1–11.

    Article  Google Scholar 

  8. 8.

    O’Toole PW, Marchesi JR, Hill C. Next-generation probiotics: the spectrum from probiotics to live biotherapeutics. Nat Microbiol. 2017;2(5):1–6.

    Article  Google Scholar 

  9. 9.

    Gómez-Gallego C, Pohl S, Salminen S, De Vos W, Kneifel W. Akkermansia muciniphila: a novel functional microbe with probiotic properties. Benef Microbes. 2016;7(4):571–84.

    Article  Google Scholar 

  10. 10.

    Martín R, Miquel S, Benevides L, Bridonneau C, Robert V, Hudault S, et al. Functional characterization of novel Faecalibacterium prausnitzii strains isolated from healthy volunteers: a step forward in the use of F. prausnitzii as a next-generation probiotic. Front Microbiol. 2017;8:1226.

    Article  Google Scholar 

  11. 11.

    Ramona Y, Sujaya IN, Nocianitri KA, Aryantha WR, Cintyadewi R, Maha-Uni I, et al., Characterization and Molecular Identification of Lactobacillus spp. Isolated from Feces of Healthy Infants for Local Probiotic Development in Bali. International Conference on Life Sciences and Biotechnology (ICOLIB); 2015; Jember, East Java, Indonesia. Jember University, East Java, Indonesia: Jember University; 2015.

  12. 12.

    Zheng J, Wittouck S, Salvetti E, Franz CM, Harris HM, Mattarelli P, 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(4):2782–858.

    CAS  Article  Google Scholar 

  13. 13.

    Kim H-Y, Bong Y-J, Jeong J-K, Lee S, Kim B-Y, Park K-Y. Heterofermentative lactic acid bacteria dominate in Korean commercial kimchi. Food Sci Biotechnol. 2016;25(2):541–5.

    CAS  Article  Google Scholar 

  14. 14.

    Dey DK, Koo BG, Sharma C, Kang SC. Characterization of Weissella confusa DD_A7 isolated from kimchi. LWT. 2019;111:663–72.

    CAS  Article  Google Scholar 

  15. 15.

    Fusco V, Quero GM, Cho G-S, Kabisch J, Meske D, Neve H, et al. The genus Weissella: taxonomy, ecology and biotechnological potential. Front Microbiol. 2015;6:155.

    Article  Google Scholar 

  16. 16.

    Sujaya IN, Sukrama IDM, Ramona Y, Nocianitri KA, Asano K, Sone T. Resistance of Lactobacillus sp. F213 in Human Gastrointestinal Tract Revealed by DNA Based Analysis of Fecal Microbiome: Quantitative Analysis of Lactobacillus sp. F213 in Human Gastrointestinal Tract by RT-PCR and Its Significant in Modulating the Immune Function. Research Collaboration. Denpasar, Bali, Indonesia: School of Public Health, Udayana University; 2013.

  17. 17.

    Fatmawati NND, Goto K, Mayura IPB, Nocianitri KA, Ramona Y, Kastawa NWEPG, et al., Adhesion Activity and Antimicrobial Resistance Profile of Weissella confusa Probiotic Strain. The 10th Asian Conference on Lactic Acid Bacteria; 2019 August 28-31, 2019; Yogyakarta, Indonesia. Yogyakarta, Indonesia: Asian Federation of Societies for Lactic Acid Bacteria, Indonesian Society for Lactic Acid Bacteria and Gut Microbiota.

  18. 18.

    Sujaya IN, Modulation of Gut Microbiota by Probiotic Weissella confusa F213. The 1st Symphosium on Probiotics, Gut Microbiome and Health; 2017; Wuxi, China. Wuxi, China: International Joint Center on Probiotics and Gut Health UK-China Joint Center on Probiotic Bacteria.

  19. 19.

    Sukmadewi IAKR, Kastawa NWEPG, Hidayati W, Fatmawati NND, Sujaya IN. Hemolysis Activity of Lactobacillus Local Strains, The Probiotics Candidates. The 10th Asian Conference on Lactic Acid Bacteria; August 28–31, 2019; Yogyakarta, Indonesia. Yogyakarta, Indonesia: Asian Federation of Societies for Lactic Acid Bacteria, Indonesian Society for Lactic Acid Bacteria and Gut Microbiota; 2019. p. 167–8.

  20. 20.

    Fatmawati NND, Goto K, Mayura IPB, Nocianitri KA, Ramona Y, Sakaguchi M, Matsushita O, Sujaya IN. Caco-2 cells monolayer as an in vitro model for probiotic strain translocation. Bali Med J. 2020;9(1):137–42.

    Google Scholar 

  21. 21.

    Delcour J, Ferain T, Deghorain M, Palumbo E, Hols P. The biosynthesis and functionality of the cell-wall of lactic acid bacteria Lactic acid bacteria: genetics, metabolism and applications. Dordrecht: Springer; 1999. p. 159–84.

    Google Scholar 

  22. 22.

    Gueimonde M, Sánchez B, de los Reyes-Gavilán CG, Margolles A. Antibiotic resistance in probiotic bacteria. Front Microbiol. 2013;4:202.

    Article  Google Scholar 

  23. 23.

    Blackwood BP, Yuan CY, Wood DR, Nicolas JD, Grothaus JS, Hunter CJ. Probiotic Lactobacillus species strengthen intestinal barrier function and tight junction integrity in experimental necrotizing enterocolitis. J Probiot Health. 2017;5(1):159.

    Article  Google Scholar 

  24. 24.

    Ramakrishna B. Probiotic-induced changes in the intestinal epithelium: implications in gastrointestinal. Trop Gastroenterol. 2009;30(2):76–85.

    CAS  PubMed  Google Scholar 

  25. 25.

    Laukoetter MG, Nava P, Nusrat A. Role of the intestinal barrier in inflammatory bowel disease. World J Gastroenterol. 2008;14(3):401.

    CAS  Article  Google Scholar 

  26. 26.

    Matsuoka K, Kanai T. The gut microbiota and inflammatory bowel disease. Seminars in immunopathology. Berlin: Springer; 2015.

    Google Scholar 

  27. 27.

    Nishida A, Inoue R, Inatomi O, Bamba S, Naito Y, Andoh A. Gut microbiota in the pathogenesis of inflammatory bowel disease. Clin J Gastroenterol. 2018;11(1):1–10.

    Article  Google Scholar 

  28. 28.

    Krishna Rao R, Samak G. Protection and restitution of gut barrier by probiotics: nutritional and clinical implications. Curr Nutr Food Sci. 2013;9(2):99–107.

    Article  Google Scholar 

  29. 29.

    Zyrek AA, Cichon C, Helms S, Enders C, Sonnenborn U, Schmidt MA. Molecular mechanisms underlying the probiotic effects of Escherichia coli Nissle 1917 involve ZO-2 and PKCζ redistribution resulting in tight junction and epithelial barrier repair. Cell Microbiol. 2007;9(3):804–16.

    CAS  Article  Google Scholar 

  30. 30.

    Seth A, Yan F, Polk DB, Rao R. Probiotics ameliorate the hydrogen peroxide-induced epithelial barrier disruption by a PKC-and MAP kinase-dependent mechanism. Am J Physiol Gastrointest Liver Physiol. 2008;294(4):G1060.

    CAS  Article  Google Scholar 

  31. 31.

    Peng L, Li Z-R, Green RS, Holzman IR, Lin J. Butyrate enhances the intestinal barrier by facilitating tight junction assembly via activation of AMP-activated protein kinase in Caco-2 cell monolayers. J Nutr. 2009;139(9):1619–25.

    CAS  Article  Google Scholar 

Download references


We would like to thank Professor Yukako Fujinaga (Department of Bacteriology, Graduate School of Medical Sciences, Kanazawa University, Japan) for providing Caco-2 cells. We also thank Nahoko Tomonobu (Department of Cell Biology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University) for the technical assistance, Gusti Putu Adi Wira Kusuma and I Gusti Putu Bhuana Aristya Putra who helped in maintaining the bacterial stocks and Heni Ruswita for the administration assistance.


This study was supported by Udayana University through International Research Collaboration Grant Scheme with Grant No. B/20-68/UN14.4.A/PT.01.05/2020.

Author information




NNDF designed this study. NNDF performed the experiments with assistance from KG, NLGYK and IPBM. KAN and YR helped in isolating, maintaining and sub culturing the bacterial strains. Data analysis and manuscript drafted by INS, GNRS and NNDF. OM and MS give critical advice to the experimental work, and also revised the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Ni Nengah Dwi Fatmawati.

Ethics declarations

Ethics approval and consent to participate

Approval for the Experiment was obtained from Research Ethic Commission of Faculty of Medicine, Udayana University, Bali, Indonesia with number 418/UN14.2.2.VII.14/LP/2020. There is no individual person recruited as research participant, nor any individual materials such as organs, tissue, and cells are used in this current study.

Consent of publication

Not applicable.

Competing interests

All authors declare they have no conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary information

Additional file 1.

Table S1 Transepithelial Resistance (TER) of Caco-2 Cell Monolayers treated with Hydrogen Peroxide only compared with Pretreatment with Probiotic Candidates Weissella confusa F213 (WCF213) or/and Lactobacillus rhamnosus FBB81 (LrFBB81); Table S2 Flux of 10 kDa FITC-labelled Dextran (μg/mL) on Caco-2 cell monolayers treated with Hydrogen Peroxide only compared with Pretreatment with Probiotic Candidates Weissella confusa F213 (WCF213) or/and Lactobacillus rhamnosus FBB81 (LrFBB81)

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated in a credit line to the data.

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Fatmawati, N.N.D., Gotoh, K., Mayura, I.P.B. et al. Enhancement of intestinal epithelial barrier function by Weissella confusa F213 and Lactobacillus rhamnosus FBB81 probiotic candidates in an in vitro model of hydrogen peroxide-induced inflammatory bowel disease. BMC Res Notes 13, 489 (2020).

Download citation


  • Probiotics
  • Weissella confusa F213
  • Lactobacillus rhamnosus FBB81
  • Trans epithelial resistance
  • ZO-1 protein
  • Inflammatory bowel diseases