Presentation on theme: "Probiotics Kathi J Kemper, MD, MPH Wake Forest University School of Medicine “You’ve been fooling around with alternative medicine, haven’t you?”"— Presentation transcript:
Probiotics Kathi J Kemper, MD, MPH Wake Forest University School of Medicine “You’ve been fooling around with alternative medicine, haven’t you?”
Disclaimer I have the following financial relationships with the manufacturer of a commercial product and/or provider of commercial services discussed in this CME activity: American Academy of Pediatrics, “Mental Health, Naturally "Author. Royalties anticipated. The presentation will include no description of any proprietary items for screening, diagnosis, or treatments. I do not intend to discuss an unapproved or investigative use of a commercial product in my presentation.
Objectives By the end of this session, participants will be able to: 1. Define and give two examples of probiotics and prebiotics and foods that contain them 2. Summarize studies about the effectiveness and safety of using probiotics to prevent/treat 1. Diarrhea, constipation, NEC, and colic 2. Eczema 3. Identify one potential side effect and one contraindication to using probiotics
Prebiotics (functional food) First identified in 1995 Non-digestible food ingredients that stimulate the growth and/or activity of probiotics Typically oligosaccharides: galactooligosaccharides (GOS), fructo- OS (FOS), xylo-OS (XOS), Inulin Found in: Breastmilk, Jerusalem artichoke, chicory root, raw dandelion greens, leeks, onions, garlic, asparagus, whole grains, beans, banana Adding Prebiotics to Probiotics increases production of gut Short-Chain Fatty Acids (SCFA)
Probiotics: definition World Health Organization: “live microorganisms which when administered in adequate amounts confer a health benefit on the host” They: Survive stomach acid and bile Establish residence in the intestines Impart health benefits
Synbiotics Products containing BOTH Prebiotics Probiotics
Probiotic examples Lactobacillus sp. reuteri casei ramnosus Acidophilus Streptococcus sp. Bifidobacterium sp. Infantis (breastmilk) lactis longum breve bifidum Sacharomyces boulardii Enterococcus sp Mixtures Formulations: drops, chewable tablets, lozenges, capsules, straws, bottle caps Brands most often recommended on CHIM listserv include BioGaia, Culturelle, Florastor
Initial Intentional Probiotic Use Eli Metchnikoff - early 20 th century (Russian Nobel laureate, professor at Pasteur Institute in Paris) Observed Bulgarians who drank milk fermented by lactic-acid producing bacteria had long lives Lactic acid lowers gut pH and inhibits the growth of some pathogenic bacteria. Metchnikoff began drinking fermented milk and soon Parisian physicians did likewise. Henry Tissier at Pasteur Institute identified bacteria common in breastfed infant stool: Bifidobacter Lactobacillus acidophilus breaks down lactose and allows lactose intolerant individuals to drink milk
Probiotics- normal source? Colonization at birth with maternal species Specific organisms vary by age in first year Become established by 1 year Diet – maternal milk, fermented milk, pickles, fermented soy (tempeh), etc. “Successful” probiotic treatment leads to temporary colonization
Primary Pediatric Uses of Probiotics Manage lactose intolerance (L acidophilus) Antibiotic-associated diarrhea and infectious diarrhea Decrease constipation Decrease risk of NEC and all cause mortality in premature infants Decrease dental caries Treatment of H pylorii infections, UTI Decrease colic Decrease risk of developing eczema Decrease upper respiratory tract infections
Antibiotic-associated Diarrhea Systematic review of 9 placebo-controlled studies (2 in children) using various products: 60% reduction in incidence and duration of antibiotic associated diarrhea compared with placebo (P<0.01) 2002 9/10 pediatric trials (different products) favored probiotics (RR 0.49; 95% CI 0.32 to 0.74). None of the 5 trials monitoring adverse events (n = 647) reported a serious adverse event. Johnston BC. Cochrane Database Syst Rev, 2007 D’Souza et al. BMJ, 2002 What I do: recommend 2-4 weeks of probiotics for all kids who receive an antibiotic prescription.
Probiotics: infectious diarrhea Treatment: Systematic review > 9 studies in 1-36 month old children; significant reduction in diarrhea days (0.7, 95% CI: 0.3-1.2) and fewer stools with L GG (95% CI: 0.7-2.6); Dose response curve with higher L GG dose. Also S. boulardii and L reuterii Van Niel et al. Pediatrics, 2002 Allen et al. Cochrane Database Syst Rev, 2004 Prevention: 2006 systematic review of 5 RCTs in day care and hospital settings: modest, but significant benefit for rotavirus or C. Diff. L GG, L reuteri > B lactis Guandalini. J Clin Gastroenterol, 2008
*Chemotherapy-associated diarrhea Benefits for pediatric oncology patients with diarrhea (incl C diff). Benchimol EI. J Pediatric Hematology/Oncology, 2004 Breast cancer and colorectal cancer patients receiving chemotherapy had markedly less diarrhea with probiotics El-Atti S.Journal of Parenteral & Enteral Nutrition, 2009; Osterlund P. Br J Cancer, 2007 Radiation induced diarrhea attenuated with probiotics. Delia P.Tumori, 2007; Fuccio L. J Clin Gastroenterol, 2009; Giralt J. Intl J Rad Onc Bio Physics, 2008
* Decreased risks in adults Recurrent colon and bladder cancer with probiotics/synbiotics; implications for pediatrics? Perioperative infections in abdominal surgery with probiotics in adults. Implications for pediatrics
Probiotics: constipation Meta-analysis of 5 RCTs (3 adults n = 266; ) 2 children, n = 111). In adults, data suggest favorable effects of several probiotics. In children, L. casei rhamnosus Lcr35, but not L. rhamnosus GG, showed a beneficial effect. Chmielewska A. World J Gastroenterol, 2010 Anecdotally, I’ve had good success. More research needed on effectiveness for constipation!
Probiotics: NEC prevention Meta-analysis of 9 trials randomizing 1,425 premature infants (<37 weeks or < 2500 gms) to prophylactic probiotics, vs. placebo or TAU; probiotics significantly reduced severe NEC by RR 0.32 and mortality by 0.43 (P<0.05); no impact on nosocomial sepsis or length of TPN. Safety: no observed cases of systemic infection with the probiotic agents. More research needed in ELBW infants. Alfaleh K. Neonatology, 2010
* Probiotics reduce all-cause mortality and NEC “ A systematic review, …of 11 randomized, controlled trials (RCTs) in 2176 infants of <34 weeks' gestation revealed that oral probiotics reduced all-cause mortality and necrotizing enterocolitis (NEC) by more than half (P <.00001).” How? “Probiotics upregulate local and system immunity, increase anti-inflammatory cytokines and gut impermeability to bacteria and toxins, and suppress pathogens associated with NEC.” Tarnow-Mordi, et al. Pediatrics, 2010 (editorial) Soll RF. Pediatrics, 2010 (editorial) Deshpande G, et al Pediatrics, 2010 (meta-analysis)
*Probiotics for Premature Infants: widespread implementation? What about < 1000 gram infants? 11 studies used 10 different probiotics Which strains? Combinations? What dose? Should strain and dose depend on type of milk feeding? Contraindications? (case report toxicity) Routine vs. informed consent? Soll RF. Pediatrics, 2010 (editorial)
Probiotics: colic RCT of L reuteri vs. simethicone for 28 days in 83 breast-fed infants Daily median crying time Day 7 P:159 minutes vs S: 177 minutes Day 28 P: 51 minutes vs S: 145 minutes (P<0.01) Percent responders by 28 days: 95% of Probiotic vs. 7% of simethicone (P<0.01) No adverse effects reported Savino F. Pediatrics, 2007
Probiotics: eczema Probiotic supplements for Finnish pregnant moms with 1 st degree fam hx atopy: L GG 10 bill cfu’s daily for 2-4 weeks before delivery, followed by infants daily for 6 months. At 2 years old, eczema prevalence reduced from 46% to 23% (RR 0.51, CI: 0.32-0.84); at 4 years, relative risk reduction for atopic eczema of 0.57 (95% CI: 0.33- 0.97); at 7 years, RR reduction: 0.58 (95% CI, 0.35-0.94; P =.027). Kalliomaki et al. Lancet 2001; Lancet, 2003; J Allergy Clin Immunol, 2007 Dutch RdbPCT (B. bifidum, B. lactis, and L. lactis) was given to pregnant women and to babies for first 12 months. Decreased risk of eczema with active treatment at 3 months, 6/50 vs 15/52 (P = 0.035) and at 12 months 23/50 vs 31/48. Niers L. Allergy, 2009
Probiotics and infections High risk of allergy 1,018 pregnant mothers RCT mix (L rhamnosus GG and LC705, B breve Bb99, P freudenreichii) vs. placebo for 4 weeks before delivery; infants received same with or without GOS for 6 months. Two year follow-up – no difference in neonatal morbidity, colic, or serious adverse effects; significantly fewer antibiotics prescribed to synbiotic group and fewer respiratory infections Kukkonen K. Pediatrics, 2008
Probiotics: Respiratory Illness Weizman, et al. 12 weeks of B lactis or L reuteri vs. TAU controls Significant reductions, all favoring L reuteri in Days with fever (0.17 vs. 0.8, P<0.001) Episodes of fever (0.1 vs. 0.4, P<0.001) Antibiotic prescriptions (0.06 vs. 0.19, P<0.05) Weizman, Pediatrics, 2005
*Nosocomial infections L GG to prevent nosocomial GI and Respiratory infections RdbpCT, N=742 hospitalized children Dose L GG 10 9 daily in 100 ml fermented milk RRisk of GI infections 0.4 for LGG vs. placebo; NNT 15; (vomiting RR 0.3; diarrhea RR 0.24) RRisk of Respiratory infections 0.38 for LGG v placebo, NNT 30 Hojsak I., et alPediatrics, 2010 (May)
Probiotics: prescribing Which organism to use? S boulardii, Lactobacillus, and E faecium have prevented antibiotic-associated diarrhea L GG and L reuterii reduced infectious diarrhea L GG for eczema L reuteri for colic Which product? What dose? How long? Side effects? Cost?
Probiotics: recommending Lactobacillus rhamnosus GG, reuterii, best studied to date Combination products not well studied, but may work as well Typical effective “dose”: 10 billion organisms/d Most require refrigeration Can give in cool food/drink
*Probiotics: product variability 2004 Can Fam Physician (Huff BA) found 0/10 brands tested matched microbiologic specifications on label; typically, 0- 10% of label quantities, often not including any of stated bacteria 1996 BMJ (Hamilton-Miller JM) only 2/13 study of 13 British brands contained quantity of cfu listed on label
Probiotics: product variability ConsumerLab.com tested 25 probiotic products 19 for general population, 3 for children, 3 yogurts 8 claimed a specific number of organisms per serving 13 claimed only a number of organisms at time of manufacture 8/25 contained less than 1 percent of the claimed number of live bacteria or of the expected minimum of 1 billion. 7 of the 8 that gave expected numbers per serving met those counts None contaminated with bacteria, mold, or fungus All enteric-coated capsules passed testing
Probiotics: common products FlorastorNature’s Way enteric coated 35 Culturelle OrganismsSaccharomyce s boulardii L rhamnosus, casei, plantarum, acidophilus, lactis, diacetylactis, bulgaricus, salivarius, helveticus, B longum, breve, infantis S thermophilus L. GG Quantity per “dose” 10 billion35 billion10 billion (reliability?) Some products are available as dairy free preparations. Sedona labs, Klaire labs, Kirkman labs, Pharmax – all recommended by various members of CHIM listserv
Probiotics: what’s in yogurt? ProductActiviaBreyers 99% Fat Free Fruit on the Bottom… DanActiveStonyfield Farm French Vanilla Nonfat Yogurt YoPlus TypeB regularis (animalis, DN-173 010) L acidophilus ? others L casei Immunitatis (casei, DN- 114 001) Bifidus L acidophilus, casei, bulgaricus, reuteri B. Lactis Bb-12 + inulin
Probiotic safety Case reports of bacteremia, fungemia, endocarditis, meningitis in immunocompromised children on ventilators 2% bloating, gas, diarrhea Increased allergic sensitization? Food is safer than pills!
Take home points… Good evidence for: Infectious diarrhea, tx Antibx-assoc diarrhea NEC; premature mortality Promising evidence for: Preventiong atopic conditions Constipation In the future we may be using probiotics as we use antibiotics today: with specific strains used for certain clinical situations guided by controlled studies Prescribing Lactobacillus GG best studied to date Combination products not well studied, but may work as well 10 billion organisms/d Keep refrigerated (except Culturelle and BioGaia) Give in cool food/drink 2% risk bloating/gas
Suggested Practice Changes Recommend L. acidophilus for patients with lactose intolerance For the next 30 days, recommend probiotics for outpatients who receive a prescription for antibiotics; monitor rate of diarrhea as a side effect Try different probiotic products yourself and monitor your own gut reaction Recommend probiotics (L GG) for patients with infectious diarrhea. Talk with your local neonatologist about using probiotics to help reduce risk of NEC. In the next week, talk with one mother of an infant about probiotics to help with colic. Ask your hospital library to subscribe to ConsumerLab.com. Prepare a handout comparing different probiotic products for your patients. Join the AAP SOCIM: www.aap.org/sections/chim/
Probiotics: proposed mechanisms Adherence and subsequent stimulation of gut immune system Up-regulation of mucin gene Enhance secretory IgA Maintain normal macrophage function Competition for essential nutrients Production of antimicrobial factors Provide favorable environment for growth of other beneficial bacteria Production of short-chain fatty acids with anti- inflammatory properties