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Copyright ©2014 Baishideng Publishing Group Co.
World J Gastroenterol. Jan 21, 2014; 20(3): 724-737
Published online Jan 21, 2014. doi: 10.3748/wjg.v20.i3.724
Table 1 Studies comparing “fermented milk based probiotic preparation” with placebo or “standard therapy + fermented milk based probiotic preparation” with “standard therapy”
Ref.Type of trialEvidence grade1Quality rating2SubjectsStudy designStudy groups/methodsOutcome variable/sResults and conclusions
Positive
Bekar et al[15], 2011, TurkeyHuman1++82 pts of dyspepsia and H. pylori infectionRCTTwo groups - Control group (n = 36; Triple therapy - lansoprazole, clarithromycin and amoxicillin + placebo) and Treatment group [n = 46; Triple therapy + kefir (fermented milk drink containing probiotics)]; given for 14 dEradication of H. pylori; adverse events of eradication therapy (Urease test after 45 d of treatment)Significantly more patients (78.2% vs 50.0%) in the treatment group achieved eradication in comparison with control group. Side effects were less frequent and less severe in the treatment group
Sachdeva et al[14] 2009, IndiaMetaanalysis1+++10 eligible trials; data available for 963 patientsMetaanalysis of human RCTs/CCTsTrials had to be randomized or quasi-randomized and controlled, using a FMPP in the intervention group treating Helicobacter-infected patients. The only difference between the two groups had to be FMPPEradication of H. pylori; adverse events of eradication therapyThe pooled odds ratio for eradication by ITT analysis in the treatment vs control group was 1.91 (1.38-2.67; P < 0.0001) using fixed effect model The pooled risk difference was 0.10 (95%CI: 0.05-0.15; P < 0.0001) by fixed effect model. Fermented milk based probiotic preparations improve H. pylori eradication rates by approximately 5%-15%, whereas the effect on adverse effects is heterogeneous
Sýkora et al[16], 2005, Czech Republic and United KingdomHuman1+++86 symptomatic H. pylori positive childrenRCTTwo groups - OAC-LC group - Omeprazole, amoxicillin and clarithromycin for 7 d with fermented milk containing L. casei DN-114001 for 14 d (n = 39) vs OAC group - Omeprazole, amoxicillin and clarithromycin for 7 d (n = 47)Eradication of H. pylori, Endoscopic and Histologic comparisonITT based eradication rates for the group A were 84.6% and 91.6% by PP analysis. Eradication in the group B was 57.5% in the ITT and 61.3% in the PP group. Eradication success was higher in the group A compared to group B in both ITT (P = 0.0045) and PP analysis (P = 0.0019)
Sheu et al[17], 2006, TaiwanHuman1++138 patients in whom triple therapy failedRCTTwo groups - yogurt (containing L. acidophilus La5, Lactobacillus bulgaricus, Bifidobacterium lactis Bb12 and Streptococcus thermophilus)-plus-quadruple therapy group for 7 d (n = 69) vs quadruple therapy only group (n = 69) for 7 dSuccessful eradication of H. pylori, drug compliance, side effectsThe yogurt-plus-quadruple therapy group had a higher H. pylori eradication rate than did the quadruple therapy only group (ITT analysis 85% vs 71.1%, P < 0.05; PP analysis- 90.8% vs 76.6%, P < 0.05). Side effects were more frequent in the quadruple therapy-only group than in the yogurt-plus-quadruple therapy group
Miki et al[20], 2007, JapanHuman1-++69 subjects who were positive for H. pylori infectionRCTTwo groups - Fermented milk (Bifidobacterium bifidum YIT) (BF-1) (n = 34) vs placebo (untreated milk) (n = 35) for 12 wkSuppressive effect of BF-1 fermented milk on H. pylori urease activity and gastric situationH. pylori infection was judged by the C-UBT. H. pylori-negativity (below 5%: n = 6 and 4 in the BF-1 and placebo groups, respectively) subjects
Sheu et al[18], 2002, TaiwanHuman1-+160 H. pylori infected patientsCCTTwo groups - triple plus yogurt (TYG) (containing L. acidophilus La5, Lactobacillus bulgaricus, Bifidobacterium lactis Bb12 and Streptococcus thermophilus) group (n = 80) vs triple only group (TG) (n = 80) for 7 dSuccessful eradication of H. pylori, drug compliance, side effectsBy ITT analysis, the triple-plus-yogurt group had a higher H. pylori eradication rate than the triple-only group (P < 0.05) and side effects were more commonly found in the TG than in the TYG. Also a significantly higher proportion of patients in the TYG completed the 7-d regimen than in the TG (67.5% vs 43.8%, P < 0.05)
Felley et al[21], 2001, BostonHuman1-+53 volunteers infected with H. pyloriCCTTwo groups - Acidified milk containing L. johnsonii La1 (LC-1) (n = 25) vs Placebo (pasteurized milk) (n = 27) for 3 wk followed by 500 mg bid clarithromycin received by all subjects during the last 2 wkEffect of the given treatment on H. pylori density, gastric inflammation and activityIn the LC-1 group, four had higher scores in the antrum, 14 were found to have a decreased H. pylori density reflected by lower scores (P = 0.02) and in the placebo group in antrum scores remain identical in 10 volunteers and decreased in 11 (0.08). The results suggest that H. pylori infection and gastritis can be down-regulated by LC-1
Cats et al[22], 2003, NetherlandsHuman1--14 H. pylori positive subjectsCCTTwo groups - Fermented milk (L.casei) for 3 wk (n = 14) vs control group (n = 6)Effect of L.casei on urease activity in vivo (H. pylori positive subjects)Urease activity decreased in nine of the 14 (64%) subjects with L. casei supplementation and in two of the six (33%) controls (P = 0.22). A slight, but non-significant, trend towards a suppressive effect of L. casei on H. pylori in vivo may exist
Wang et al[19], 2004, TaiwanHuman1--70 volunteers infected with H. pyloriCCTTwo groups - AB yogurt (containing L. acidophilus La5, Lactobacillus bulgaricus, Bifidobacterium lactis Bb12 and Streptococcus thermophilus) (n = 59) vs milk placebo (n = 11) for 6 wkEffect of yogurt on H. pylori infection in humansAdministration of AB-yogurt decreased the urease activity of H. pylori after 6 wk of therapy (P < 0.0001). Regular intake of yogurt containing Bb12 and La5 effectively suppressed H. pylori infections in humans
Park et al[23], 2001, South KoreaHumanNR-40 H. pylori infected volunteersCCTTwo groups - Fermented milk (Lactobacillus acidophilus, Lactobacilus casei) (n = 21) vs Placebo (n = 19) for 4 wkEradication of H. pylori, Comparison of endoscopic findings, ComplianceAll patients were compliant and the H. pylori density of antrum tended to decrease in treatment group compared with placebo group (P = 0.072). 3 cases in treatment group were noted for negative conversions of both rapid urease test and C-UBT
Kim et al[24], 2007, South KoreaHumanFTNAFTNA262 H. pylori infected patientsCCTTwo groups - triple plus yogurt group for 3 wk (n = 147) vs triple only group (n = 115) for 1 wkEradication of H. pyloriIn PP analysis, H. pylori eradication rate in the yogurt group, 87.7% was marginally higher than that in control group, 78.4% (P = 0.055). And according to ITT analysis, the eradication rate in the yogurt group, 78.2% was also marginally higher than that of control group, 69.5% (P = 0.062)
Negative
Goldman et al[25], 2006, ArgentinaHuman1+++65 children who tested positive for H. pyloriRCTTwo groups - triple therapy with probiotic food (commercial yogurt containing Bifidobacterium animalis and Lactobacillus casei) (n = 33) vs triple therapy with placebo (milk fluid) (n = 32)Eradication of H. pyloriWe found no significant differences in H. pylori eradication rates at 1 and 3 mo between the treated group (ER 45.5% and 42.4%) and the control group (ER = 37.5% and 40.6%). Study could not demonstrate an adjuvant effect of the studied probiotic food to triple therapy in the eradication of H. pylori infection in children
Song et al[26], 2005, South KoreaHumanNA-70 patients with duodenal ulcerCCTTwo groups - triple-plus-fermented milk (Lactobacilli) (n = 35) vs triple plus placebo (n = 35)H. pylori eradication rate, Fermented milk group reduces treatment-related adverse reactionsEradication was successful in 88.6% in the Lactobacilli group and 85.7% in the placebo group (P = 1.00). Lactobacillus containing fermented milk couldn’t exert beneficial effects on H. pylori eradication or treatment-related adverse reactions
Table 2 Studies comparing capsule based probiotic (bacteria only) with placebo or standard therapy plus capsule based probiotic vs standard therapy
Ref.Type of trialEvidence grade1Quality rating2SubjectsStudy designStudy groups/ methodsOutcome variable/sResults and conclusions
Positive
Canducci et al[27], Italy, 2000Human1++120 H. pylori positive patientsRCTTwo groups: RCA (Rabeprazole, Clarithromycin, Amoxycillin) group- triple therapy (n = 60), RCAL group- triple therapy with Lactéol Fort for 7 dEffect of L. acidophilus could improve the efficacy of a standard anti-H. pylori therapyIn RCA group eradication was successful in 72% at PP analysis or 70% at ITT analysis and in RCAL group eradication was achieved with 88% with PP analysis, 87% with ITT analysis
Negative
Gotteland et al[28], 2005Human1++254 children positive for H. pyloriRCTThree groups: Antibiotics (group Ab)- (n = 57) for 8 d, Lactobacillus acidophilus LB (group Ab)- (n = 63) for 8 wk, Saccharomyces boulardii plus inulin (group Sb1)- (n = 62) 8 wkTo evaluate the capacity of Lactobacillus acidophilus LB and of symbiotic combination of Sb plus inulin to interfere with H. pylori colonization in childrenH. pylori was eradicated in 66%, 12% and 6.5% of the children from the Ab, Sb1 and LB groups, respectively. A moderate but significant difference in ∆ DOB was detected in children receiving living Sb1, but not in those receiving LB
Lionetti et al[29], 2006, ItalyHuman1+++40 H. pylori positive childrenRCTTwo groups: Group A- 10 d sequential therapy plus L. reuteri ATCC 55730, Group B-Placebo with the same therapyEffect of Lactobacillus reuteri to prevent or minimize the gastrointestinal side-effectsNo significant differences were observed between the groups in the success of H. pylori eradication. Treatment was successful in 17 of 20 [85% (95%CI: 68-100)] patients in probiotic supplemented when compared with 16 of 20 patients in placebo group [80% (95%CI: 61–99)] (P = NS)
Nista et al[30], 2004, ItalyHuman1+++106 H. pylori positive patientsRCTTwo groups: Group A- triple therapy for 7 d plus Bacillus clausii (probiotic) for 14 d starting from the first day of the treatment (n = 54) Group B- triple therapy plus placebo (n = 52)Effect of probiotic on incidence and severity of antibiotic-associated side-effects during anti- H. pylori therapy and eradication was evaluated with means of 13C-urea breath testThe H. pylori eradication rate was similar between B. B. clausii and placebo groups. In particular, ITT analysis has shown H. pylori was eradicated in 39 of 54 patients (72.2%) in the B. clausii group and in 37 of 52 patients (71.15%) in the placebo group. In PP population, H. pylori was eradicated in 39 of 50 patients (78%) in the B. clausii group and in 37 of 50 patients (74%) in the placebo group
Myllyluoma et al[31], 2005, FinlandHuman1++47 subjects with H. pylori infectionCCTTwo groups: Group A –probiotic drink (n = 23), group B- Placebo (n = 24) during H. pylori eradication and for 3 wk following the treatmentEffect of probiotic therapy on symptoms associated with the recommended H. pylori eradication treatment. As a secondary end-point to find out whether this therapy could improve the eradication rateThe H. pylori eradication rate was non-significantly higher in the group receiving probiotic therapy (91% vs 79%, P = 0.42)
Cindoruk et al[32], 2007, TurkeyHuman1++124 patients with H. pylori infectionRCTTwo groups: Group A- triple therapy plus S. boulardii, Group B- triple therapy plus placebo for 14 dEfficacy and safety of S. boulardii in the prevention of side effects and the eradication success of anti-H. pylori therapyH. pylori eradication rate, although higher in the treatment group, was statistically similar in treatment and control groups: 71% (44/62) vs 59.7% (37/62), respectively (P > 0.05)
Armuzzi et al[33], 2001, ItalyHuman1++60 healthy asymptomatic subjects screened positive for H. pylori infectionCCTTwo groups: Group A- triple therapy for 7 d plus Lactobacillus GG for 14 d during and the week after eradication therapy, Group B- triple therapy plus placeboEffect of probiotic Lactobacillus GG to minimize or to prevent the occurrence of gastrointestinal side effectsH. pylori eradication rates in group A was 83.33% (25/30) and in group B was 80% (24/30). H. pylori eradication rate had no significant difference
Guo et al[34], China, 2004HumanFT NAFT NA97 H. pylori positive symptomatic patientsCCTTwo groups: treatment group (triple therapy plus Bifid triple viable capsule containing Bifidobacteria longum, faecal streptococci, Lactobacillus acidophilus) (n = 47) control group: triple therapy (n = 50)Efficacy of probiotic in the treatment of H. pyloriEradication rate was 93.6% (44/47) in treatment group and 88% in control group (44/50). H. pylori eradication rate had no significant difference
Armuzzi et al[35], 2001, ItalyHumanFT NAFT NA120 healthy asymptomatic subjects screened positive for H. pylori infectionCCTTwo groups: Group A- triple therapy for 7 d plus Lactobacillus GG for 14 d during and the week after eradication therapy, Group B- triple therapy plus placeboEffect of probiotic Lactobacillus GG to minimize or to prevent the occurrence of gastrointestinal side effects.H. pylori eradication rates in group A was 80% (48/60) and in group B was 76.67% (46/60). H. pylori eradication rate had no significant difference
Cremonini et al[36], Italy, 2002HumanFT NAFT NA85 H. pylori positive, asymptomatic patientsCCTFour groups- received both during and for 7 d after a 1 wk-triple therapy Group I- Lactobacillus GG (n = 21), group II-Saccharomyces boulardii (n = 22), group III-lactobacillus spp. And bifidobacteria (n = 21), group IV-placebo (n = 21)Efficacy of probiotic in the eradication of H. pylori infectionThe H. pylori eradication rate was almost identical between the probiotic and placebo groups
Tursi et al[37], 2004, ItalyHumanFT NAFT NA70 patients with persistent H. pylori infectionCCTTwo groups- group A- quadruple therapy plus bacteria lactobacillus casei subsp. casei DG or group B- quadruple therapy onlyEffect of probiotic supplementation on the effectiveness and tolerability of a new second-line 10 d quadruple therapyH. pylori was negative in 33/34 group A patients (PP: 97.05% ITT: 94.28%) and 30/32 Group B patients
Cao et al[38], China, 2005HumanFT NAFT NA128 H. pylori positive symptomatic patientsCCTTwo groups: Group A -quadruple therapy plus Clostridium butyricum group B- quadruple therapyEffect of treatment given in eradication of H. pyloriEradication rates in group A 96.88% (62/64) and group B 92.19% (59/64) was not significantly different
Table 3 Clinical trials comparing fermented milk based probiotic preparations vs plain fermented milk
Ref.Type of trialEvidence grade1Quality rating2SubjectsStudy designStudy groups/ methodsOutcome variable/sResults and conclusions
Positive
Pantoflickova et al[39], 2003, SwitzerlandHuman1-++50 H. pylori positive healthy volunteersRCTTwo groups- fermented milk with LC (n = 25) vs fermented milk as Placebo (n = 25). Subjects took the treatment twice daily during the first 3 wk and once daily for the next 13 wkEffect of LC1 intake without antibiotics on H. pylori gastritis, H. pylori densityLC1 intake had a favorable, albeit weak, effect on H. pylori associated gastritis, particularly in the antrum. Regular ingestion of fermented milk containing L.johnsonii may reduce the risk of developing disorders associated with high degrees of gastric inflammation and mucus depletionPlacebo intake led to a decrease in severity and activity of gastritis in the antrum (inflammatory cell score after 3-wk and 16 wk consumption: 6.3 ± 0.7 and 6.4 ± 1.0, respectively). In the placebo group, mucus depletion scores remained at the same level during the whole duration of the study. H. pylori density decreased in 38% of subjects after 3 wk and 50% after 16 wk
Horie et al[40], 2004, Japan, South Korea, EgyptHuman1--42 subjects with H. pylori infectionCCTTwo groups- A- test group (yogurt containing 1, 5 g of egg yolk IgY-urease 3 times daily) (n = 22), B- control group (IgY-urease free yogurt) (n = 20)Effect of IgY-Urease drinking yogurt on C-UBT valuesTG showed a reduction in UBT values from 51.18 ± 3.40 at wk 0 to 33.70 ± 3.50 and 31.03 ± 3.54 at 2 and 4 wk resp. Suppression of H. pylori infection in humans could be achieved by consumption of drinking yogurt fortified with IgY-ureaseCG showed some decrease in UBT values from 51.40 ± 4.48 to 44.38 ± 5.17 and 43.53 ± 5.48 at 0, 2 and 4 wk, resp. There was no significant difference obtained at week 0 and weeks 2 or 4
Sakamoto et al[41], 2001, JapanHuman2-31 subjects infected with H. pylori infectionCTThe study was conducted in two parts. 1st part = 90 g of yogurt (0-9 wk). 2nd part = 90 g yogurt containing LG21 (9-18 wk)Efficacy of Lactobacillus gasseri OLL2716 (LG21) as a probiotic for Helicobacter pyloriThe [13C] urea breath test and assays of serum pepsinogens revealed a significant improvement following LG21 treatment. LG21 was thus determined to be effective in both suppressing H. pylori and reducing gastric mucosal inflammationThere was no significant difference in C-UBT levels at 0 (26.2 ± 15.1) and 9 (26.6 ± 13.7) wk
Table 4 Whey protein components and its basic properties
Whey componentsConcentration (g/L)% of Whey ProteinMolecular weight (kDa)Number of amino acids residuesBiological propertiesRecommendation grade against Helicobacter1
β-Lactoglobulin1.350%-55%18277162Source of essential and branched chain amino acids-
α-Lactalbumin1.220%-25%14175123Primary protein found in human breast milkD
Source of essential and branched chain amino acids
Immunoglobulins(A, B and C)0.710%-15%25000 (light chain) + 50000-70000 (heavy chain)-Primary protein found in colostrum Immune modulating benefitsD
Lactoferrin0.11%-2%80000700AntioxidantA
Antibacterial, antiviral, and antifungal
Promotes growth of beneficial bacteria
Naturally occurs in breast milk, tears, saliva, bile, blood, and mucus
Lactoperoxidase0.030.50%70000612Inhibits growth of bacteria-
Bovine Serum Albumin0.45%-10%66267582Source of essential amino acids-
Large protein
Glycomacropeptide1.210%-15%670064Source of branched chain amino acidsD
Lacks the aromatic amino acids phenylalanine, tryptophan and tyrosine
Table 5 Studies comparing bovine lactoferrin with placebo or “standard therapy + bovine lactoferrin” with “standard therapy”
Ref.Type of trialEvidence grade1Quality rating2SubjectsStudy designStudy groupsOutcome variableResults and conclusion
Sachdeva et al[58], 2009, IndiaMetaanalysis1+++5 trials; 682 subjects [bLF group (n = 316); control group (n = 366)]Metaanalysis of human RCTs/CCTsTrials had to be randomized or quasi-randomized and controlled, using bLF in the intervention group treating Helicobacter-infected patients. The only difference between the two groups had to be bLFEradication of H. pylori; adverse events of eradication therapyThe pooled odds ratio (5-studies) for eradication by intention to treat analysis was 2.22 (95%CI: 1.44-3.44; P = 0.0003) using the fixed effects model (FEM) and 2.24 (95%CI: 1.15-4.35; P = 0.0003) using the random effects model (REM) (Cochran’s Q = 6.83; P = 0.145). The pooled risk difference was 0.11 (95%CI: 0.05 -0.16; P = 0.0001) by FEM (Cochran’s Q = 6.67; P = 0.154) and 0.10 (95%CI: 0.04-0.17; P = 0.0023) by REM. There was no significant difference in incidence of adverse effects
Di Mario et al[51], 2003, ItalyHuman1++150 consecutiveH. pylori-positive patients suffering from dyspeptic symptoms, gastritis and peptic ulcer diseaseRCTThree groups – A-triple therapy (rabeprazole,clarithromycin,tinidazole) with lactoferrin for 7 d (n = 51), B-triple therapy for 7 d (n = 52), C- triple therapy for 10 d (n = 47)Efficacy of standard triple therapy plus bovine lactoferrin in the eradication of H. pyloriEradication rates (ITT) were A- 92.2%, B-71.2%, C-70.2 %. Results suggest that lactoferrin tested in the present study was effective in curing H. pylori and could be a new agent to assist the antimicrobials in the eradication of the bacterium
Di Mario et al[52], 2006, ItalyHuman1++402 consecutiveH. pylori-positive patients suffering from dyspeptic symptoms, gastritis and peptic ulcer diseaseRCTThree groups – A- triple therapy (esomeprazole,clarithromycin,tinidazole) for 7 d (n = 136), B-lactoferrin followed by triple therapy for 7 d (n = 132), C- triple therapy with lactoferrin (n = 134)Efficacy of bovine lactoferrin in the treatment of H. pylori infectionEradication rate (ITT)- A- 77%, B- 73%, C = 90%. Incidence of side effects was A- 9.5%, B- 9%, C- 8.2%Results demonstrate that bovine lactoferrin is an effective adjuvant to triple therapy for eradication of H. pylori Infection
Okuda et al[53], 2005, JapanHuman1-+59 H. pylori infected healthy volunteers or children who were enrolled in a previous epidemiological studyCCTTwo groups- bLF (n = 31), placebo (n = 28)Efficacy of a single administration of bLF. Improvement of H. pylori infection, adverse effectsPositive response (> 50% decrease in C-UBT values) was observed in 10 of 31 bLF-treated subjects and 1 of 28 control subjects, indicating that the rate of positive response in the bLF group was significantly higher than that in the control group
Tursi et al[54], 2007, ItalyHuman1-+70 consecutive patients with persistent H. pylori infection after failure of a first standard treatmentCCTTwo groups- A-quadruple therapy (ranitidine bismuth citrate plus triple therapy- esomeprazole ,amoxicillin, tinidazole) (n = 35), B- quadruple therapy plus lactoferrin (n = 35)Efficacy and tolerability of bLF supplementation to this quadruple therapy in re-treating H. pylori infectionEradication rate- A-88.57%, B-94.28%. Side effects- A-29.41%, B-17.64%. bLF supplementation was found effective in reducing side-effect incidence. It seems capable of achieving a slight (NS statistically) improvement in eradicating H. pylori
Zullo et al[55], 2005, ItalyHuman1+++133 consecutive patients with non-ulcer dyspepsia and H. pylori infectionRCTTwo groups- A- triple therapy for 7 d (n = 68), B- quadruple therapy (triple therapy plus lactoferrin) (n = 65)Eradication rate of H. pylori infection, side effects and complianceEradication rate (ITT) A- 77.9%, B- 76.9%. Side effects- A –10.3%, B- 9.2%. Quadruple therapy with bLF did not significantly increase the H. pylori cure rate of standard 7-d clarithromycin-amoxycillin based triple therapy in non-ulcer dyspepsia patients
Zullo et al[56], 2007, ItalyHuman1++144 consecutive dyspeptic patientsRCTTwo groups – A- triple therapy (rabeprazole, levofoxacin, amoxycillin) (n = 72), B- quadruple therapy (rabeprazole, clarithromycin, tinidazole plus bovine lactoferrin) (n = 72)Eradication rate of H. pylori infection, side effects and complianceEradication rate (ITT) A- 68.1%, B-72.2%. H. pylori eradication rate following both quadruple therapy with lactoferrin and a low-dose PPI, triple therapy with levofloxacin is disappointingly low
Imoto et al[57], 2004HumanFTNAFTNA25 H. pylori positive healthy volunteersCCTTwo groups- A- bLf mixed with a commercial yogurt (n = 16) B- yogurt (n = 9)Effect of bLf against H. pyloriThe C-UBT values at week 8 were significantly lower than those at week 0 in the bLf group (P < 0.01), whereas no difference was observed in the control group