Cited by 36Probiotics and Fermented FoodsInfant Nutrition and HealthMicrobial Metabolites in Food Biotechnology

Protection of candidate probiotic lactobacilli by Cheddar cheese matrix during simulated gastrointestinal digestion

Open access
Leeuwendaal, N.K., Hayes, J.J., Stanton, C., O'Toole, P.W., Beresford, T.P.·2022·Journal of Functional Foods

Abstract

Previously, Lacticaseibacillus rhamnosus DPC7102 and Lacticaseibacillus paracasei DPC7150 isolated from commercial Irish Cheddar cheeses were shown to exhibit probiotic traits in vitro. The objective of this study was to investigate how these strains survive in cheese and to explore whether a cheese or fermented milk matrix provided protection during simulated digestion using the INFOGEST 2.0 static digestion model. Manufacture of Cheddar cheese and fermented milks using these strains did not significantly impact cheese composition or ripening parameters. The Cheddar cheese matrix provided significantly more protection to non-starter lactic acid bacteria than the fermented milk. Pulsed-field gel patterns of isolates surviving simulated digestion confirmed the presence of the strains of interest. These data indicate that these two Lacticaseibacillus strains successfully persist in the cheese matrix during cheese ripening following which they are capable of surviving simulated digestion. This supports their potential for further development as candidate food-delivered probiotics.

Verified 2026-10-09 · 2 references not checked yet

AI snapshot

Written from the paper’s full text.

TL;DR

Cheddar cheese made with *Lacticaseibacillus rhamnosus* DPC7102 or *Lacticaseibacillus paracasei* DPC7150 as adjuncts maintained high NSLAB populations during 180-day ripening without altering composition or overall proteolysis. In INFOGEST 2.0 simulated digestion, the Cheddar matrix protected both strains significantly better than fermented milk, with >1 log CFU/g lower reductions and higher percent survival.

Key findings

  • Cheddar cheese protected both strains more than fermented milk during INFOGEST 2.0. For *Lc. rhamnosus* DPC7102, survival was 1.23% in Cheddar vs 0.12% in fermented milk, with log reductions of 1.93 vs 3.00 log CFU/g. For *Lc. paracasei* DPC7150, survival was 14.33% in Cheddar vs 0.46% in fermented milk, with log reductions of 0.86 vs 2.36 log CFU/g; the paper describes this as 30 times higher survival in the cheese matrix.
  • Adjunct addition did not significantly affect cheese composition at day 14 (pH, moisture, salt, S/M, fat, FDM, MNFS) or total proteolysis. No significant differences were seen between cheese groups for % WSN/g or total FAA at any ripening point, although some individual amino acids differed, including aspartic acid at days 14, 30, 60, 135 and 180, and glycine at days 7, 14 and 30.
  • The adjunct strains persisted at high levels during ripening. *Lc. rhamnosus* DPC7102 was present at 7.6 log CFU/g on day 1 and peaked at 8.6 log CFU/g at day 180; *Lc. paracasei* DPC7150 was present at 7.1 log CFU/g on day 1, peaked at 8.3 log CFU/g at day 90, and was 7.9 log CFU/g at day 180. Control cheese NSLAB were first detected at day 60 (2.0 log CFU/g) and reached 5.8 log CFU/g at day 180.
  • PFGE after simulated digestion showed all 18 randomly selected colonies from the DPC7102 Cheddar matched the original DPC7102 strain. In the DPC7150 Cheddar, 4 of 18 profiles matched the original DPC7150 adjunct, while the other 14 matched DPC7102, indicating potential cross-contamination during manufacture and subsequent dominance of DPC7102.

Methods

  • Pilot-scale Cheddar cheese trials were performed in triplicate with three vats: control (starter only), *Lc. rhamnosus* DPC7102 adjunct, and *Lc. paracasei* DPC7150 adjunct. Fermented milks were also made separately with each strain. Cheeses were ripened for 180 days and sampled at days 1, 7, 14, 30, 60, 90, 135 and 180.
  • Composition was measured at day 14; microbial enumeration used LM17 agar for starter lactic acid bacteria and LBS agar for NSLAB; primary and secondary proteolysis were measured as % pH 4.6 WSN/g and free amino acids.
  • Day-180 Cheddar and fermented milk samples were digested using the INFOGEST 2.0 static model with modifications, including gastric lipase. Post-digestion NSLAB were enumerated, and 18 colonies per cheese were randomly selected for PFGE. Statistical comparisons used ANOVA in IBM SPSS v26.

Limitations

  • Stated limitations: The paper does not report a limitations section; it only states that there are no ethical issues or concerns relating to the work.
  • Evident: Survival and protection were assessed only in vitro using the static INFOGEST 2.0 model; no human feeding, gut colonization, or health outcomes were measured.
  • Evident: In the DPC7150 cheese, only 4/18 PFGE profiles matched the original adjunct while 14/18 matched DPC7102, indicating cross-contamination during manufacture and dominance of DPC7102; this complicates attribution of survival and protection specifically to DPC7150 in that cheese.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.jff.2022.105042

Cites

56 of 58 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 34 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    Manufacture of Cheddar cheese and fermented milks using Lc. rhamnosus DPC7102 or Lc. paracasei DPC7150 did not significantly impact ripening parameters (proteolysis).

    “Manufacture of Cheddar cheese and fermented milks using these strains did not significantly impact cheese composition or ripening parameters.”
    • Also stated in: § 3.3. Proteolysis in cheese during ripening · plain
      “However, no statistically significant differences were seen between cheese groups at any point during cheese ripening (Fig. 3).”
    • Also stated in: § 3.3. Proteolysis in cheese during ripening · plain
      “No statistically significant differences were seen in mean levels of total FAA between cheese groups at any point during cheese ripening (Fig. 4).”
    Quote in the paperNot a substantial claim
  • Findingown data

    The two Lacticaseibacillus strains successfully persist in the cheese matrix during cheese ripening.

    “These data indicate that these two Lacticaseibacillus strains successfully persist in the cheese matrix during cheese ripening following which they are capable of surviving simulated digestion.”
    • Also stated in: § 3.2. SLAB and NSLAB populations during cheese ripening · plain
      “Lc. rhamnosus DPC7102 NSLAB numbers increased to eventually peak at 8.6 log CFU/g at Day 180, while the Lc.paracasei DPC7150 NSLAB peaked earlier at Day 90 with 8.3 log CFU/g and dropped off slightly for a final count of 7.9 log CFU/g at Day 180 (Fig. 2).”
    Quote in the paperSubstantial claim
  • Findingown data

    No statistically significant differences in % WSN/g were seen between cheese groups at any point during cheese ripening.

    “However, no statistically significant differences were seen between cheese groups at any point during cheese ripening (Fig. 3).”
    Quote in the paperNot a substantial claim
  • Findingown data

    In general, NSLAB populations for both adjunct cheeses remained between 7.1 and 8.6 log CFU/g throughout ripening.

    “In general, NSLAB populations for both cheeses remained between 7.1 and 8.6 log CFU/g throughout ripening (Fig. 2).”
    Quote in the paperNot a substantial claim
  • Findingown data

    Adjuncts Lc. rhamnosus DPC7102 and Lc. paracasei DPC7150 were present at 7.6 and 7.1 log CFU/g, respectively, at the Day 1 timepoint.

    “Adjuncts Lc. rhamnosus DPC7102 and Lc.paracasei DPC7150 added to their corresponding cheeses were present at 7.6 and 7.1 log CFU/g, respectively, at the Day 1 timepoint (Fig. 2).”
    Quote in the paperNot a substantial claim
  • May combine two claims. 37
  • Classified as probably not a substantial claim. 32
  • The quote only partly states this claim. 1
  • May combine two claims.

    Findingown data

    The Control cheese NSLAB population was only detected at Day 60 at 2.0 log CFU/g and reached 5.8 log CFU/g at the end of ripening.

    “In contrast, the Control cheese NSLAB population (to which no adjunct cultures were added) was only detected at Day 60 (at 2.0 log CFU/g) and reached a count of 5.8 log CFU/g at the end of the ripening process (Fig. 2).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingown data

    Levels of WSN increased for all three cheeses as ripening time progressed.

    “Levels of WSN (an indicator of primary proteolysis) increased for all three cheeses as ripening time progressed.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Lc. paracasei DPC7150 NSLAB peaked at Day 90 with 8.3 log CFU/g and dropped to 7.9 log CFU/g at Day 180.

    “Lc. rhamnosus DPC7102 NSLAB numbers increased to eventually peak at 8.6 log CFU/g at Day 180, while the Lc.paracasei DPC7150 NSLAB peaked earlier at Day 90 with 8.3 log CFU/g and dropped off slightly for a final count of 7.9 log CFU/g at Day 180 (Fig. 2).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    A significant increase in % WSN/g was observed in the Lc.paracasei DPC7150 cheese from Day 30 onward, and Control and Lc.rhamnosus DPC7102 cheeses exhibited significantly higher % WSN/g levels from Day 60 onwards.

    “A significant increase in % WSN/g was observed in the Lc.paracasei DPC7150 cheese from Day 30 onward (p ≤ 0.05), and Control and Lc.rhamnosus DPC7102 cheeses exhibited significantly higher % WSN/g levels from Day 60 onwards.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingown data

    Aspartic acid was the most variable amino acid between the three cheeses, and differed significantly at days 14, 30, 60, 135 and 180.

    “Aspartic acid was the most variable amino acid between the three cheeses, and differed significantly at days 14, 30, 60, 135 and 180.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingown data

    Most individual amino acid concentrations did not differ significantly between the three cheeses, although some exceptions were observed at various points during cheese ripening.

    “Most individual amino acid concentrations did not differ significantly between the three cheeses, although some exceptions were observed at various points during cheese ripening.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Total FAA increased significantly from Day 7 onward for the Control and Lc.rhamnosus DPC7102 cheeses, and from Day 14 onward for the Lc.paracasei DPC7150 cheese.

    “Total FAA increased significantly from Day 7 onward for the Control and Lc.rhamnosus DPC7102 cheeses, and from Day 14 onward for the Lc.paracasei DPC7150 cheese.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Total FAA concentration significantly increased in all Cheddar types, from Day 7 in Control and Lc. rhamnosus DPC7102 cheeses and from Day 14 in Lc. paracasei DPC7150 cheese, but no significant differences were observed in total FAA between cheese types.

    “The total concentration of FAA significantly (p ≤ 0.05) increased in all Cheddar types, from Day 7 in the Control and Lc.rhamnosus DPC7102 cheeses and from Day 14 in the Lc.paracasei DPC7150 cheese, but no significant differences were observed in total FAA between cheese types.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Detection of tryptophan ceased at day 30 for all cheeses.

    “Detection of tryptophan ceased at day 30 for all cheeses.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Initial SLAB counts were high (approximately 9 log CFU/g) and remained at these levels until Day 90, then decreased to final counts between 5.2 and 6.3 log CFU/g.

    “initial SLAB counts were high (≈9 log CFU/g) and remained at these levels until the 90 Day time point, and then began to decrease to final counts of between 5.2 and 6.3 log CFU/g.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    % WSN/g increased significantly as ripening time progressed, with significant increase from Day 30 onward in Lc. paracasei DPC7150 cheese, followed by Control and Lc. rhamnosus DPC7102 cheeses from Day 60 onward.

    “% WSN/g increased significantly as ripening time progressed, with a significant increase (p ≤ 0.05) from Day 30 onward in Lc. paracasei DPC7150 cheese being observed, followed by the Control and Lc.rhamnosus DPC7102 cheeses from Day 60 onward.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Log reductions in CFU/g were greater in the fermented milk matrix for both Lacticaseibacillus strains, with a 1 and 1.5 log greater reduction in the fermented milk matrix than the Cheddar matrix for the Lc. rhamnosus DPC7102 and Lc.paracasei DPC7150, respectively.

    “Log reductions in CFU/g were also greater in the fermented milk matrix for both Lacticaseibacillus strains, with a 1 and 1.5 log greater reduction in the fermented milk matrix than the Cheddar matrix for the Lc.rhamnosus DPC7102 and Lc.paracasei DPC7150, respectively (Table 2).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingown data

    Glycine concentrations differed significantly at three timepoints (days 7, 14 and 30).

    “Glycine concentrations differed significantly at three timepoints (days 7, 14 and 30).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    In this study, % WSN/g increased as maturation progressed, and no significant differences in % WSN/g between Cheddar types were observed.

    “In this study, we observed that the levels of % WSN/g increased as maturation progressed and no significant differences in % WSN/g between Cheddar types were observed.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    The two Cheddars with NSLAB adjuncts reached numbers over 7 log CFU/g initially and remained at this level throughout the study.

    “In contrast, the other two Cheddars had NSLAB adjuncts added to them, both of which reached numbers over 7 log CFU/g initially and remained at this level for the duration of the study.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    In Control cheese, quantifiable NSLAB populations appeared only at Day 60, then climbed to 5.8 log CFU/g.

    “When monitoring levels of NSLAB in the Control cheese, quantifiable populations only appeared at Day 60, after which they continued to climb and eventually reached 5.8 log CFU/g.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    The only significant differences in SLAB counts between Cheddar types were at Days 135 and 180, with Control cheese at Day 180 having approximately 1 log higher SLAB population than cheeses containing adjunct cultures.

    “The only significant differences seen between Cheddar types were observed at Days 135 and 180, with the Control cheese at Day 180 having ≈1 log higher population of SLAB than the cheeses containing the adjunct cultures.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Cheddar cheese protected lactobacilli to a significantly greater extent than fermented milk counterparts, with >1 log CFU/g difference seen between matrices in both cases.

    “Cheddar cheese was shown to protect lactobacilli to a significantly greater extent than the fermented milk counterparts, with > 1 log CFU/g difference seen between matrices in both cases.”
    • Also stated in: § 5. Conclusion · plain
      “When comparing the survival of strains during the INFOGEST 2.0 static digestion model, Cheddar cheese proved a superior dairy matrix when compared to fermented milk grown with the same lactobacilli strains.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    While some differences in individual amino acid levels were observed, the majority did not differ significantly between the three Cheddars, and no differences were seen between cheeses when total amino acid levels were examined.

    “While some differences in individual amino acid levels were observed, the majority did not differ significantly between the three different Cheddars and no differences were seen between cheeses when total amino acid levels were examined.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Excluding the initial timepoint, levels of GABA were always higher in Cheddars containing Lacticaseibacillus adjuncts, although this difference was only significant at day 30.

    “Excluding the initial timepoint, levels of GABA were always higher in the Cheddars containing the Lacticaseibacillus adjuncts, although this difference was only significant at day 30.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Overall, the addition of Lc. rhamnosus DPC7102 or Lc. paracasei DPC7150 did not affect SLAB proliferation or cheese composition when compared to the adjunct-free Cheddar control.

    “Overall, the addition of Lc. rhamnosus DPC7102 or Lc.paracasei DPC7150 did not affect SLAB proliferation or cheese composition when compared to the adjunct-free Cheddar control.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    The potentially probiotic lactobacilli survived at >7.7 log CFU/g after 12 months of cheese maturation and >6.5 log CFU/g following INFOGEST 2.0 simulated digestion.

    “The log CFU/g counts of the potentially probiotic lactobacilli were > 7.7 following 12 months of cheese maturation and > 6.5 following the INFOGEST 2.0 simulated digestion”
    • Also stated in: § 5. Conclusion · plain
      “Cheddar cheese produced in this study contained NSLAB with proven in vitro probiotic traits that were both capable of surviving at 10 7 CFU/g during cheese ripening and could also survive at levels of 10 6 CFU/g following simulated digestion.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    The NSLAB population of cheese with Lc. rhamnosus DPC7102 adjunct was homogeneous and composed only of the Lc. rhamnosus DPC7102 strain.

    “The NSLAB population of cheese with Lc. rhamnosus DPC7102 adjunct was found to be homogeneous and composed only of the Lc.rhamnosus DPC7102 strain”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Glycine levels differed significantly between cheeses at Days 7, 14 and 30, with Lc. rhamnosus DPC7102 cheeses tending to have higher concentrations than either control or Lc. paracasei DPC7150 cheese, but were similar for remaining timepoints.

    “Glycine levels differed significantly (p ≤ 0.05) between cheeses at Days 7, 14 and 30, with Lc. rhamnosus DPC7102 cheeses tending to have higher concentrations than either the control or the Lc.paracasei DPC7150 cheese but were similar for the remaining timepoints.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Cheese may be a more suitable vehicle for microbes than yogurt.

    “It has been suggested that cheese may be a more suitable vehicle for microbes than yogurt (Gardiner, Stanton, Lynch, Collins, Fitzgerald, & Ross, 1999).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Gardiner et al., 1999 source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    NSLAB grow in cheese during ripening, normally attaining populations in excess of 10^7 CFU/g, and thus are likely to remain viable to the levels required by regulatory agencies until the time of consumption.

    “Cheese as the matrix of choice for probiotics of NSLAB origin is further enhanced by the fact that NSLAB grow in cheese during ripening, normally attaining populations in excess of 10 7 colony forming units per gram and thus, are likely to remain viable to the levels required by the regulatory agencies until the time of consumption (Leeuwendaal et al., 2021).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Leeuwendaal et al., 2021 source

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Various members of the Lactobacillaceae family, which are common NSLAB of cheeses, have performed favourably in terms of probiotic potential.

    “Various members of the Lactobacillaceae family, which are common NSLAB of cheeses, have performed favourably in terms of probiotic potential, some of which were originally isolated from cheese and other dairy sources (Maragkoudakis, Zoumpopoulou, Miaris, Kalantzopoulos, Pot, & Tsakalidou, 2006;Fijan, 2014).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Maragkoudakis et al., 2006 source

      Not checked in the free run.

    • cites Fijan, 2014 source

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  • May combine two claims.

    Premisecitation

    Cheese generally has a higher pH than yogurt, which imparts less stress upon microbes while in the food matrix.

    “Generally, cheese has a higher pH than yogurt which imparts less stress upon microbes while in the food matrix, and the high fat content offers additional protection during transit through the gastrointestinal tract (GIT) (Flach, van der Waal, van den Nieuwboer, Claassen, & Larsen, 2018).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Flach et al., 2018 source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    Sufficient numbers of probiotic bacteria must be present and viable in the final food product at the time of consumption to have the potential to elicit a positive health response, with the minimum requirement usually set at between 10^6 and 10^7 CFU per gram of food.

    “Various organisations involved in food regulatory affairs have stated that sufficient numbers of probiotic bacteria must be present and viable in the final food product at the time of consumption to have the potential to elicit a positive health response, with the minimum requirement usually being set at between 10 6 -10 7 colony forming units per gram of food (Leroy, & De Vuyst, 2014).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Leroy & De Vuyst, 2014

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    Lacticaseibacillus rhamnosus DPC7102 and Lacticaseibacillus paracasei DPC7150, isolated from commercial Irish Cheddar cheeses, exhibit probiotic traits in vitro.

    “Previously, Lacticaseibacillus rhamnosus DPC7102 and Lacticaseibacillus paracasei DPC7150 isolated from commercial Irish Cheddar cheeses were shown to exhibit probiotic traits in vitro.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Leeuwendaal et al., 2021 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Some cheeses contain non-starter lactic acid bacteria (NSLAB) that have probiotic properties.

    “Some cheeses have also been found to contain non-starter lactic acid bacteria (NSLAB) that have probiotic properties (Settanni, & Moschetti, 2010;Leeuwendaal, Stanton, O'Toole, & Beresford, 2021).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Settanni & Moschetti, 2010

      Not checked in the free run.

    • cites Leeuwendaal et al., 2021 source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    The high fat content of cheese offers additional protection to microbes during transit through the gastrointestinal tract.

    “Generally, cheese has a higher pH than yogurt which imparts less stress upon microbes while in the food matrix, and the high fat content offers additional protection during transit through the gastrointestinal tract (GIT) (Flach, van der Waal, van den Nieuwboer, Claassen, & Larsen, 2018).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Flach et al., 2018 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    Simulated digestions were performed in triplicate and repeated three times.

    “Simulated digestions were performed in triplicate and repeated three times.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    MRS and LBS media are designed to support the growth of lacticaseibacilli; LBS contains inhibitors of lactococci and provides a low pH environment tolerated by lactobacilli.

    “MRS and LBS, based on the work of Rogosa et al (1951) are designed to support the growth of lacticaseibacilli.The key difference between both media is that LBS contains ammonium citrate, sodium acetate, acetic acid and ferrous sulphate that act as inhibitors of lactococci and provide a low pH environment which is tolerated by lactobacilli.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Rogosa et al., 1951 source

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  • Classified as probably not a substantial claim.

    Premisereasoning

    Where high populations of lactococci are expected in conjunction with lacticaseibacilli, such as in cheese, LBS is the medium of choice.

    “Where high populations of lactococci are expected in conjunction with lacticaseibacilli; such as is the case with cheese LBS is the medium of choice.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Rogosa et al., 1951 source

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Secondary proteolysis occurs when proteinases and peptidases degrade polypeptides from primary proteolysis into smaller peptides and free amino acids, which can be quantified in the WSN extract.

    “Secondary proteolysis occurs when proteinases and peptidases degrade the polypeptides produced in primary proteolysis into smaller peptides and free amino acids, which can be quantified in the WSN extract (Rank, Grappin, & Olson, 1985).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Rank, Grappin, & Olson, 1985 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Physical and chemical stresses during cheese production and maturation impede the ability of starter lactic acid bacteria (SLAB) to survive.

    “While SLAB are initially added for acidification of milk, the physical and chemical stresses experienced during cheese production and maturation impede their ability to survive (Ganesan, Weimer, Pinzon, Dao Kong, Rompato, Brothersen, & McMahon, 2014;Choi, In Lee, Rackerby, Frojen, Goddik, Ha, Do, & Park, 2020).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Ganesan, Weimer, Pinzon, Dao Kong, Rompato, Brothersen, & McMahon, 2014

      Not checked in the free run.

    • cites Choi, In Lee, Rackerby, Frojen, Goddik, Ha, Do, & Park, 2020 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    In primary proteolysis, casein molecules are broken down into smaller polypeptides, primarily by rennet (chymosin) remaining in the cheese curd post production.

    “In primary proteolysis, the casein molecules are broken down into smaller polypeptides, which is primarily carried out by the rennet (the coagulant, chymosin) that remains in the cheese curd post production (Fox, Wallace, Morgan, Lynch, Niland, & Tobin, 1996;Soodam, Ong, Powell, Kentish, & Gras, 2015).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Fox, Wallace, Morgan, Lynch, Niland, & Tobin, 1996

      Not checked in the free run.

    • cites Soodam, Ong, Powell, Kentish, & Gras, 2015

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  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Amino acids released within the cheese matrix can be metabolised by the microbiome, resulting in formation of additional flavour and aroma active compounds.

    “In addition to contributing to the organoleptic properties of the cheese, the amino acids released within the cheese matrix can be metabolised by the microbiome resulting in the formation of additional flavour and aroma active compounds (Ardö et al., 2017).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ardö et al., 2017

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Pure strains of both the Lc.rhamnosus DPC7102 and Lc.paracasei DPC7150 were run in their respective gels as controls.

    “Pure strains of both the Lc.rhamnosus DPC7102 and Lc.paracasei DPC7150 were run in their respective gels as controls.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Proteolysis involves hydrolysis of cheese casein to smaller peptides and amino acids, which accumulate during ripening and contribute to texture and overall flavour.

    “Proteolysis involves the hydrolysis of cheese casein to smaller peptides and amino acids which accumulate during cheese ripening and contributes the texture and overall flavour of the finished product (Ardö, McSweeney, Magboul, Upadhyay, & Fox, 2017).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ardö, McSweeney, Magboul, Upadhyay, & Fox, 2017

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Variation in environmental conditions such as pH and S/M could impact on behaviour of the adjuncts during cheese ripening and simulated gastric digestion.

    “This is important as variation in composition, usually measured by the four parameters of pH, S/M, FDM and MNFS impacts on cheese quality and variation in environmental conditions such as pH and S/M could impact on behaviour of the adjuncts during cheese ripening and simulated gastric digestion (Gilles, & Lawrence, 1973).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Gilles & Lawrence, 1973

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    As pH and lactose decrease in aging Cheddar, SLAB populations decline and are outcompeted by non-starter lactic acid bacteria (NSLAB), which can reach up to 10^8 CFU/g in mature cheese.

    “As pH values and lactose concentrations decrease in the aging Cheddar, SLAB populations begin to decline and are outcompeted by the more metabolically versatile NSLAB, which can reach numbers as high as 10 8 CFU/g in mature cheese (Ong et al., 2017).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ong et al., 2017

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    The other 14 profiles indicate potential cross contamination during cheese manufacture and subsequent dominance of DPC7102 following extended ripening.

    “The other 14 profiles seen among the Lc.paracasei DPC7150 Cheddar isolates appear to match the original Lc.rhamnosus DPC7102 strain profile, indicating potential cross contamination during cheese manufacture and subsequent dominance of DPC7102 following extended ripening (Fig. S7B).”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Variation in cheese composition, usually measured by pH, S/M, FDM and MNFS, impacts on cheese quality.

    “This is important as variation in composition, usually measured by the four parameters of pH, S/M, FDM and MNFS impacts on cheese quality and variation in environmental conditions such as pH and S/M could impact on behaviour of the adjuncts during cheese ripening and simulated gastric digestion (Gilles, & Lawrence, 1973).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Gilles & Lawrence, 1973

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    Cheddar cheese trials were performed in triplicate.

    “Cheddar cheese trials were performed in triplicate on January 22nd, January 30th, and February 12th (2019) at pilot scale (Moorepark Technology Limited, Teagasc Moorepark).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Lambda PFG Ladder was loaded with every gel as a reference marker.

    “Lambda PFG Ladder (New England BioLabs® Inc.) was loaded with every gel as a reference marker.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Microbial population shifts in cheese can influence biochemistry, particularly proteolysis and formation of free amino acids during ripening.

    “Microbial population shifts are important in cheese as they have the potential to influence biochemistry, in particular proteolysis and formation of FAA during cheese ripening (Smit, Smit, & Engels, 2005).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Smit, Smit, & Engels, 2005 source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims. The quote only partly states this claim.

    Study design and conductnone given

    All measurements and experiments were carried out in triplicate.

    “All measurements were carried out in triplicate.”
    • Also stated in: § 2.6. Primary and secondary proteolysis · plain
      “All experiments were carried out in triplicate.”
    • Also stated in: § 2.7. Microbial analysis · plain
      “All experiments were carried out in triplicate.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Accumulation of tryptophan can lead to its catabolism by microorganisms in cheese, producing flavour defects described as faecal, putrid and unclean.

    “which is generally desirable as accumulation of this amino acid can lead to its catabolism by microorganisms in the cheese leading to the production of flavour defects, including flavours described as faecal, putrid and unclean (Gummalla, & Broadbent, 1999;Ummadi, & Weimer, 2001).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Gummalla, & Broadbent, 1999

      Not checked in the free run.

    • cites Ummadi, & Weimer, 2001

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisereasoning

    Most of these polypeptides are soluble in water at pH 4.6, and thus water-soluble nitrogen at pH 4.6 is a useful indicator of primary proteolysis.

    “Most of these polypeptides are soluble in water at pH 4.6 and thus nitrogen levels soluble in water at pH 4.6 are a useful indicator of primary proteolysis.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    As of now, only one previous study has attempted to digest cheese using this model and did not examine microbial survival, instead focusing on peptide profiles of Prato cheese.

    “As of now, only one previous study has attempted to digest cheese using this model and did not examine microbial survival, instead focusing on the impact of simulated digestion on peptide profiles of Prato cheese (Baptista, Salgaço, Sivieri, & Gigante, 2020).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Baptista, Salgaço, Sivieri, & Gigante, 2020

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    The addition of the adjuncts did not have a large effect on primary or secondary proteolysis, with neither primary nor secondary proteolysis differing significantly from the control except for a few amino acids.

    “Thus, the addition of the adjuncts did not have a large effect on primary or secondary proteolysis.”
    • Also stated in: § 5. Conclusion · plain
      “Additionally, neither primary nor secondary proteolysis differed significantly with the control, with the exception of a few amino acids.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    Aspartic acid can be broken down to give a buttery flavour (diacetyl) but may also affect the chemistry of other highly volatile sulfuric compounds.

    “Aspartic acid can be broken down to give a buttery flavour (diacetyl) but may also affect the chemistry of other highly volatile sulfuric compounds (Ardö, 2006).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Ardö, 2006 source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisecitation

    INFOGEST was further improved to include an oral phase and lipase enzyme during the gastric phase (INFOGEST 2.0).

    “This is referred to as the INFOGEST method, and was further improved upon to include an oral phase and lipase enzyme during the gastric phase (INFOGEST 2.0) (Brodkorb et al., 2019).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Brodkorb et al., 2019 source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Generally, probiotic products are expected to contain a minimum concentration of 10^6 CFU/g prior to ingestion, and 10^8-10^9 CFU/g should be consumed daily to ensure health benefits.

    “Generally, probiotic products are expected to contain a minimum concentration of 10 6 CFU/g prior to ingestion, and that 10 8 -10 9 CFU/g should be consumed on a daily basis to ensure any health benefits to take effect (Kechagia, Basoulis, Konstantopoulou, Dimitriadi, Gyftopoulou, Skarmoutsou, & Fakiri, 2013).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Kechagia, Basoulis, Konstantopoulou, Dimitriadi, Gyftopoulou, Skarmoutsou, & Fakiri, 2013

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    GABA is a neurotransmitter and important bioactive compound with many physiological functions, and many LAB from fermented foods are capable of generating it.

    “GABA is a neurotransmitter and important bioactive compound with a plethora of physiological functions, and many LAB have been identified from fermented foods that are capable of generating this compound (for a review, see Cui, Miao, Niyaphorn, & Qu, 2020).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Cui, Miao, Niyaphorn, & Qu, 2020

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Sharp et al. (2008) showed a reduction of 2 log CFU/g of Lb. casei 334e when exposed to a 30-minute acid stress test in a low-fat Cheddar matrix, while the same strain showed a 6 log CFU/g reduction following the same acid test in a yogurt matrix.

    “Sharp et al. (2008) showed a reduction of 2 log CFU/g of Lb. casei 334e when exposed to a 30-minute acid stress test in a low-fat Cheddar matrix, while the same strain showed a much higher 6 log CFU/g reduction following the same acid test in a yogurt matrix (Sharp et al., 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Sharp et al., 2008 source

      Not checked in the free run.

  • May combine two claims.

    Interpretationown data

    This study demonstrated that two Lacticaseibacillus strains previously shown to express probiotic traits can survive in a Cheddar cheese matrix during ripening when added as an adjunct and can survive simulated gastric digestion using INFOGEST 2.0.

    “This study demonstrated the ability of two Lacticaseibacillus strains previously shown to express probiotic traits (Leeuwendaal et al., 2021) to survive in a Cheddar cheese matrix during ripening when added as an adjunct and to have the ability to survive simulated gastric digestion using the INFOGEST 2.0 model.”
    • Also stated in: § Table 1 · boosted
      “These data demonstrate that both strains are capable of surviving in a Cheddar matrix for at least 12 months of ripening, and that both are capable of surviving simulated gastric digestion.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Leeuwendaal et al., 2021 source

      Not checked in the free run.

59 of 59
  • The paper relies on this without support.

    Survival through the INFOGEST 2.0 simulated digestion model is indicative of the ability of these strains to survive human gastrointestinal transit and thus of their potential as food-delivered probiotics.

    “This supports their potential for further development as candidate food-delivered probiotics.”
  • The paper relies on this without support.

    The modifications made to the INFOGEST 2.0 protocol do not compromise its validity as a model of human gastrointestinal digestion.

    “digested in vitro using the INFOGEST 2.0 protocol, with some modifications (Brodkorb et al., 2019).”
  • The paper relies on this without support.

    Survival in the INFOGEST 2.0 in vitro digestion model predicts survival in the human gastrointestinal tract and potential health impact.

    “Thus, these strains can survive at sufficient levels once ingested to potentially impact on human health.”
  • The paper relies on this without support.

    The INFOGEST 2.0 static digestion model adequately simulates human upper gastrointestinal digestion for Cheddar cheese and fermented milk.

    “In order to determine the suitability of Cheddar cheese as a microbe delivery matrix, INFOGEST 2.0 was employed on both the Lc.rhamnosus DPC7102 and Lc.paracasei DPC7150 cheeses, as well as fermented milk samples inoculated with the two Lacticaseibacillus strains of interest.”
    “Thus, this study is the first to utilise the INFOGEST 2.0 with gastric lipase (relevant due to the high fat content of Cheddar) to determine survival of potentially beneficial microorganisms through the upper digestive system.”
4 of 4

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Gilles, 1973, The assessment of Cheddar cheese quality by compositional analysis, New Zealand Journal of Dairy Science and Technology, 8, 148

Cited by

Sorted by citations

Authors
Leeuwendaal, N. K., Hayes, J. J., Stanton, C., O'Toole, P. W., & Beresford, T. P.
Affiliations
Teagasc - The Irish Agriculture and Food Development Authority (IE)
Corresponding author
Beresford, T.P.
Venue
Journal of Functional Foods
Publisher
Elsevier BV
Published
2022-05
Volume
92
Pages
105042
ISSN
1756-4646 (ISSN-L)
OpenAlex
W4220887431
Cited by
36
References
57
Citations by year
2026: 9 · 2025: 5 · 2024: 9 · 2023: 9 · 2022: 4
FWCI
3.59
Type
journal article
Language
en
Open access
Locations
  • Journal of Functional Foods (publishedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Science Foundation Ireland
  • Teagasc
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
  • Health Sciences › Nursing › Nutrition and Dietetics › Microbial Metabolites in Food Biotechnology
Keywords
probiotics, Cheddar cheese, cheese ripening, in vitro digestion, non-starter lactic acid bacteria, fermented milk, probiotic viability, cheese matrix

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-09.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-09.

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