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PROBIOTICS

PROBIOTICS

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    Probiotics in pediatrics.pptx mmm Probiotics in pediatrics.pptx mmm Presentation Transcript

    • Probiotics new generation in pediatrics
      Carlos D. Ramos-Perea M.D. F.A.A.P
      Catedrático Asociado Escuelas de Medicina Ponce y Central del Caribe
      Pediatra- Neonatólogo- Cuidados Intensivos
      HOSPITAL MATERNO-INFANTIL SAN ANTONIO MAYAGUEZ, P.R.
    • Objectives
      • Describe how the intestinal microflora support development of healthy immune system.
      • Define :PROBIOTICS AND PREBIOTICS
      • Understand factors that affect bacterial colonization of the intestinal tract.
      • Review data supporting clinical benefits of probiotics particularly bifidobacteria and that is safe and well tolerated by infants and children.
      • GOOD START REVIEW
    • Facts about Probiotics
      • Prebiotics: Non digestible food ingredients that selectively stimulate the growth or activity of limited number of bacteria in the colon that have the potential to improve host health.
      • PROBIOTICS:
      • Non pathogenic microoranism resistant to acid & bile that can, adhere to epithelial tissue, transiently colonize GI, produce antimicrobial, modulate immune response and influence metabolic activity of intestinal flora.
    • Cont. facts about probiotics
      • Beneficial effects of probiotics are strain specific and dose dependant relationship; has been suggested.
      • BIFIDOBACTERIA AND LACTOBACILLI are the most commonly studied genera of all probiotics.
    • Cont. facts about probiotics
      • Lactic acid bacteria convert sugars(lactose) and other CHO into lactic acid.
      • PH gets lower, and creates poor environment for growth.
      • Lactobacillus contains lactase within their cell wall, adhering to the intestinal microvillus, digesting lactose.
      • Non fermented milk containing L.bulgaricus significantly reduced both breath hydrogen results and symptoms of lactose int.
      De verse et all am j clin nutr 2001:73
    • Human Intestinal Flora (Microbiota)
      • More than 500 species
      • Trillions of bacteria
      • Important for healthy intestinal function & nutrition
      • Motility, digestion, intestinal trophism
      • Critical for immune system development and response
      • Gut barrier function and immuno-modulation
      7
    • INTESTINAL ANATOMY
      GALT
    • Intestinal Flora (A Balanced Ecosystem)
      13
      Pseudomonas
      Potentially Harmful Bacteria
      • Diarrhea/constipation
      • Infections
      • Production of Toxins
      Potentially Helpful Bacteria
      • Improve balance of good to harmful bacteria
      • Stimulation of immune functions
      • Aid in digestion and/or absorption
      • Synthesis of vitamins
      Proteus
      Staphylococci
      Clostridia
      Enterococci
      E. coli
      Lactobacilli
      Streptococci
      Eubacteria
      Potential Probiotics Bacteria
      (When Ingested)
      Bifidobacteria
      Bacteroides
      Adapted from: Gibson 1995
    • Ingestion of Bacteria (Transient Intestinal Bacteria) have a Lengthy History
      15
      Monks Perfect
      Fermentation
      Pasteurization
      Sumerians
      (Cheese)
      Celts & Huns(Kefir)
      Abraham
      (Milk & curds)
      2000
      3500 BC
      2000 BC
      AD
      Antibiotics
      Probiotics
      In the last 100 years, we drastically changed our ingestion of microbes and our microbial environment
    • Bacteria Proposed as Beneficial (HYSTORY)
      • Bacteria play a role in disease and health
      • Lactic acid bacteria are important for human health and longevity
      • Ingested bacteria can have positive influence on health:
      16
      Elie Metchnikoff
      (1845-1916)
    • Commonly Used Probiotics
      • BIFIDOBACTERIA
      • B. lactis (Bb12)
      • B. longum
      • B. breve
      • B. infantis
      • LACTOBACILLI
      • L. casei
      • L. rhamnosus (GG)
      • L. reuterii
      • L. plantarum
      17
    • Live Active Cultures of Bacteria in the Food Supply
      18
    • BIFIDOBACTERIA
      • Anaerobic, Gram + curved rods
      • Produce short chain fatty acids: acetate and lactate
      • Survive intestinal digestion and appear in stool
      • Predominant flora of breast fed infants
      19
      Bifidobacterium lactis
      Nomenclature: B. lactis also: B. animalis sub-species lactis, also B. bifidum, strain Bb12
    • Bifidobacteria Supplementation can Increase colonization with Bifidobacteria
      20
      Langhendries 1995
    • Number of Scientific Publications on Probiotics
      21
    • Nestle research center
      • Found bacteria from mother gut are transferred via breast to infant gut.
      • Translocated bacteria influence colonization of infant bowel contribute to education of infant gut.
      • For MULTIPLE and VARIABLE reasons some infants can't breast feed. Research has proven that formula with probiotics provide the same flora as breast feed reducing allergies, infections and improve defenses.
    • NRC CONTINUATION
      • Natural birth is not sterile and C/S neonates don't benefit from this inoculum.
      • Diet in early life is a mayor factor for this ecosystem.
      • Since breast milk is not sterile and contains among other species bifidobacteria. It contains also oligosaccharides that promote growth of bifidobacteria.
    • Intestinal Flora and Feeding Type (%)
      24
      Formula fed
      Breast fed
      Harmsen 2000
    • NRC CONT.
      • Intestinal flora is critical in the development of immune response.
      • 80% of immunologically active cells are contained in the gut.(GALT)
      • Germ free animals revealed underdeveloped mucosal inmune system with very small PEYER patches,decreased lymphocytes in mucosa and absent IGA producing cells.
      • The signaling of bacteria through receptors in mucosa are responsible for development of immune system.
    • Immune system cells-B and T cells adaptive response
    • Antimicrobial activities of probiotics include the (1) production of bacteriocins/ defensins , (2) competitive inhibition with pathogenic bacteria, (3) inhibition of bacterial adherence translocation, and (4) reduction of luminal pH. Probiotics bacteria can also enhance intestinal barrier function by (5) increasing mucus production.
    • (mechanical defense)
      Mucus layer
      Categorized depends on cytokine profile
      Promote- eos recruitment
      Encourage T cell prolif. And macrophage activ. Inflammatory defense
      The balance between T lymph important role in modulating immune response
      Over expression
      proinflamatory
    • Peyer patch cell,presentor to APC
    • Inhibits Ige production
      Th2
      Th1
      Protective Immunity
      Allergy
    • Immune Response
      • Enhance systemic and local humoral immune response to Rotavirus.
      • Beneficial increased production of cytokines.
      • Enhance mucosal resistance against GI infections.
      • Increase Th1 cytokine interferon g allergic response.
      • Increases in acetic acid and scfa similar to breast.
      • Improve fecal flora in preterm and LBW by increasing bifidobacteria.
    • Immune response cont.
      • In healthy newborns a T h2 response predominates, and gut permeability is very high, predisposing to allergic responses.
      • A” healthy” microbial balance will promote Th1 responses and decrease Th2 decreasing allergic and atopic disease.
      • Bifidobacteria and lactobacilli given orally will modulate GALT toward a balance T helper response and stimulate production of I-1O all of them having roles in immune response.
      • Markedly enhance production of secretory IGA.
    • Effects of probiotics documented on gut barrier and inmune response
      • Promote mucin production and compete with and inhibit growth of potential pathogens.
      • Decrease gut permeability and enhance natural killer cell activity, macrophage activation and phagocytosis.
      • Increase IGA,IGG,IGM secreting cells.
      • Increase specific secretory IGA in serum and interstitial lumen.
      • Modulate Th1 and Th2 via GALT.
    • Clinical Importance
      • Decrease in frequency and duration of diarrhea.
      • Reduce incidence of diarrhea in chronically hospitalized, malnourish infants and neonates.
      • Lower prevalence of diaper rash.
      • Reduce severity of antibiotic induce diarrhea.
      • Lower incidence of atopic dermatitis.
      • Decrease GI symptoms, gut inflammation and protein loss.
    • Clinical importance CONT.
      • Improvement in weight of infants receiving antibiotics.
      • Colonization of host friendly bacteria.
      • Improve weight gain and tolerance to lactose containing formulas in neonates.
      • Decrease incidence , severity, and mortality due to NEC in VLBW infants.
    • PRETERMS AND IUGR
      • Impaired neonatal T and B cells(lack of Th1 differentiation), PMNS decrease chemotactic and adhesion.
      • Immature microvillus with mucus deficiency and iga with permeability to macromolecules, microorganism and toxins. This starts NEC.
      • Antenatal steroids induces intestinal maturation and NEC
    • PRETERMS AND IUGR
      • Breast milk protects against NEC.
      • Iga ,lysozyme, complement, macrophages, growth factors, PAF-ACETYLHYDROLASE, and production of anti inflammatory cytokines.
      • Pufa in breast milk modifies cytokine and endotoxic response in rat model.
      • Trophic feedings is of establish value in preterm nutritional management and has been shown not to increase NEC. Standard milk advance is associated with NEC.
    • INFANTS BREAST FEED ARE 7-10 TIMES LESS LIKELY TO SUFFER NEC.
    • NEC
      DR.RAMOS-PEREA-ATOPSIA CMM 1995
    • NEC
    • Prophylactic Probiotics for Prevention of Necrotizing Enterocolitis in Very Low Birth Weight Newborns
      • Department of Pediatrics, Medical College Calcutta, 88, College Street, CALCUTA 700073, India.
      Our study showed that enteral administration of prophylactic probiotics in neonatal intensive care could significantly reduce morbidity due to necrotising enterocolitis in very low birth weight newborn. It also helps in establishing early full enteral feeding and reduces hospital stay.
      • journal of Tropical Pediatrics 2009 55(2):128-131; doi:10.1093/
      • Ibañez,20 La administración temprana de suplementos de probióticos en pretérminos de muy bajo peso al nacer podría disminuir el riesgo de padecer enterocolitis necrotizante
      Vicente Ibáñez Pradas. Servicio de Cirugía Pediátrica, Hospital General de Castellón. Castellón (España).
      • (Lin HC et all. PEDIATRICS;2005;115:1-4)
      SPAIN STUDY
      USA STUDY
    • Probiotics Eases Irritable Bowel Syndrome Symptoms
      • The nerves and muscles in the bowel appear to be extra sensitive. Muscles may contract too much. These contractions can cause cramping and diarrhea during or shortly after a meal. Or the nerves may react when the bowel stretches, causing cramping or pain.
      Immunologic signaling
    • Secretory otitis media
      • University of Gothenburg, SWEDEN
      • PILOT STUDY February 2009
      • 60 children properly diagnosed, receive 2 sprays per nostril for 10 days with LACTOBACILUS rhamnosun compare with 60 with placebo.30 ptes.(50%) Showed clinical cure of the process vs. only one with placebo.
      • No side effects reported. No changes in cytokine pattern reported.
    • ?????
      Recent evidence showed mark improvement with probiotics.(Journal of Gastroenterology 2005)
    • Diagnosis ??
    • Safety of probiotics
      • In general lactobacillus and bifidobacteria had a long history of food safety use in human population.
      • To date 70 clinical studies involving more than 4000 children and infants(term & preterm)consuming infant formula and food containing microbial ingredients with no reports of probiotics adverse side effects.
      • Specific strains of bacteria(bifidobacteria) have shown modulating effects on GALT to have immnoprotective and in particular protections from pathogens such as rotavirus.
    • Safety of Bifidobacteria
      • Genus Bifidobacteria:
      • Predominate in breast fed infants
      • No pathogenicity reported
      • B. lactis-containing yogurt is consumed worldwide
      • Infant formula with B. lactis: 15 years, 30 countries
      • Only bacterium with FDA authorization for use in infant formula
      53
    • GOOD START NATURAL CULTURES
      • Support intestinal barrier and immune function. DHA PLUS ARA .
      • Partially hydrolyzed whey proteins
      • Facilitate digestion(break down to simple a. acids.
      • Decrease risk of sensitization and development of allergy (atopic dermatitis)*1
      • Probiotics cultures: Bifidobacteria lactis.
      • Help maintain a healthy balance of intestinal flora.
      54
      GINI TRIAL
      * Von Berg 2007
    • Expertos Recomiendan Niveles Medios de LCPUFAs en la Leche Humana para Formulas Infantiles de Niños a Termino
      % de Acidos Grasos
      DHA ARA
      ~0.4 ~0.4
      ~0.35 ~0.7
      ~0.35 ~0.5
      0.2 0.35
      Grupo Expertos
      British Nutrition Foundation (BNF; ‘92)
      Food and Agriculture Organization World Health Organization (FAO/WHO; ‘94)
      Expert Panel convened by NIH/ISSFAL (‘99)
      Child Health Foundation, Germany (‘01)
    • Composición de Fosfolípidos de Corteza Cerebral (% de ac grasos totales)
      *
      *
      * p< 0.05
      Farquharson Lancet 92
    • FORMULA CON DHA + ARA
    • FORMULA DHA-ARA
    • DHA
    • DHA
    • Benefits of GOOD START NATURAL CULTURES
      63
      Less curd formation
      Faster gastric emptying
      Easy protein digestion
      Greater stool softness
      Potential for allergy prevention
      A good balance of intestinal florasupports a healthy immune system
    • Muchas gracias ; preguntas ?