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Presentation on Probiotics with mechanism of action, examples, figures.

Published in: Health & Medicine, Technology


  1. 1. Probiotics : Bifidobacterium andLactobacillus Pinky Sheetal V Bioinformatics
  2. 2. Presentation Layout • What are Probiotics? • The Probiotic history • Why are Probiotics important for human health? • Lactobacillus and Bifidobacterium • Foods containing Probiotics • Mechanism of action • Features of Probiotics • Beneficial effects of Probiotics • Prebiotics- concept, features, mode of action and applications • Commercial Probiotic strains • Genetically engineered Probiotics • Safety Guidelines • Status of Probiotics in India • Indian and global Probiotics manufacturers.
  3. 3. What are Probiotics? Probiotics are defined as live microbes which when administered in adequate amounts confer a beneficial health effect on the host--- WHO 2002Lactobacillus species Bifidobacterium speciesL. acidophilus B. bifidumL. casei (rhamnosus) B. longumL. reuteri B. breveL. bulgaricus B. infantisL. plantarum B. lactisL. johnsonii B. adolescentisL. lactis Others Bacillus cereus Non pathogenic Escherichia coli Saccharomyces cerevisiae Enterococcus faecalis Streptococcus thermophilus
  4. 4. The Probiotic History •Ellie Metchnikoff, the first scientist who proposed the therapeutic use of lactic acid bacteria. •Lactic acid bacteria were first discovered by Pasteur in 1857 •Their isolation from rancid milk was reported in 1878 by Lister. In 1889 Tissier discovered Bifidobacterium spp. •The first stable cultures of Lactobacillus casei strain Shirota were made in 1930 by Dr. Minoru Shirota
  5. 5. Why are Probiotics important for Humanhealth? Antibiotics Destroy the Problems in gut micro flora digestion Alcohol consumption Problems in Emergence of absorption of antibiotic nutrients in the resistant strains body Stress Probiotics
  6. 6. Lactobacillus Bifidobacterium•Acid tolerant strains: • Saccharolytic organisms strains:•Lactic acid as the major •Produce acetic and lactic acidsmetabolic end product without generation of CO2 •They are lactic acid bacteria (LAB) •Source:  Raw and fermented dairy products  Fresh and fermented plant products The reproductive and intestinal tracts of humans and other animals.
  7. 7. Food containing Probiotics• Milk• Soya milk• Tofu• Milk products- Sour cream, Butter milk, Yogurt• Fermented Indian foods like Idlis Dosas Dhoklas Vadas Kadhi
  8. 8. Features of Probiotics• Non-pathogenic• Nontoxic• Resistant to gastric acid• Adhere to gut epithelial tissue• Produce antibacterial substances• It should persist for short periods in the gastro-intestinal tract• Able to resist the antibacterial mechanisms that operate in the gut• Need to avoid the effects of peristalsis, which tend to flush out bacteria with food• Resistant to the bile acid
  9. 9. Mechanism of action of ProbioticsProduction of low-molecular-weight antibacterial substance that inhibits both gram-positive and gram-negative enteric bacteria Also use enzymatic mechanisms to modify toxin receptors and block toxin- mediated pathology Also prevent colonization of pathogenic microorganisms by competitive inhibition for microbial adhesion sites
  10. 10. Diarrhea Type of Diarrhea Pathogen Probiotic used Clostridium difficile Clostridium difficile Lactobacillus GG diarrhea Traveler’s diarrhea Enterotoxigenic Saccharomyces boulardii Escherichia coli Pediatric diarrhea Campylobacter, Lactobacillus GG and Salmonellae, Shigellae Bifidobacterium The beneficial effect was shown to be accompanied by a greater immunoglobulin A–antibody secreting response and less rotaviral shedding in children treated with these agents.
  11. 11. Cholesterol assimilation Mechanism of cholesterol assimilation by Probiotics Direct IndirectInhibiting the de Decreasing the Deconjugating thenovo synthesis of intestinal absorption of cholesterol to bile salts cholesterol dietary cholesterol Lactose,calcium hydroxyl Assimilation Binding Degradationmethyl glutarate, uric acid, whey proteins
  12. 12. Anticancer effects Increase the susceptibility to colon cancer by conversion of pre-carcinogensHigh animal fat and protein Diet = to carcinogens by the intestinal micro flora Enzymes (Glycosidase, B- glucuronidase , azoreductase , and nitroreductase ) Active Pre-carcinogens carcinogens Activity of L. acidophilus and L. casei supplementation in humans helped to decrease levels of these enzymes.
  13. 13. • Lactose- intolerant individuals tolerate yogurt mainly due to the supply of lactase activity from the lactic acid bacteria present in the yogurt itself.• Lactose deficiency leads to calcium malabsorption• Acidic condition = Calcium absorption is more• Production of lactic acid by hydrolysis of milk lactose by Probiotics.
  14. 14. Allergy• Degradation/structural modification of antigens.• Normalization of the properties of aberrant indigenous microbiota.• Regulation of the secretion of inflammatory mediators.• Stimulating immune response and reduction of serum IgE levels.• Lactobacillus and Bifidobacterium improve mucosal barrier function.• Probiotics have been shown to reduce the incidence of childhood eczema.• Probiotics have been shown to control lactose intolerance.
  15. 15. Prebiotics• A selectively fermented ingredient that allows specific changes, both in the composition and/or activity of the gastrointestinal microflora that confers benefits upon the host wellbeing and health.• Prebiotics + Probiotics = Synbiotics Characteristics of Prebiotics partially digestible Non Digestible or Non Absorbable in the small intestine Well fermented by beneficial bacteria in the gut Poorly fermented by potentially pathogenic bacteria in the gut Poorly fermented by bacteria in the mouth Frequently used Prebiotics (Non digestible oligosaccharides NDOs) Inulin and oligofructose; Galactooligosaccharides; Lactulose
  16. 16. Mode of action of Prebiotics Bifidobacterium Prebiotics selective medium Lactobacillus Carbon and energy source Metabolism= short resultant acidic chain fatty acids intestinal SCFA environment. • Bifidobacterium and Lactobacillus possess permeases to initialize these substrates before hydrolyzing and metabolizing. • The product being simple sugars are not available to the pathogenic bacteria as this process is intracellular.
  17. 17. Applications of Prebiotics• Can be consumed as dietary supplements or in functional foods.• Prebiotic compounds may also be added to animal feed, as an alternative to antibiotics.• Reduce carriage of enteric pathogens, thereby preventing transmission to humans .• Dietary prebiotics sourced from seaweeds may provide a means to modulate the intestinal microbiota thereby improving the overall health of animals and humans.
  18. 18. Genetically Engineered Probiotics• Use of genetically modified Probiotics as TMAU Trimethylaminuria• A genetically modified Bacteroides ovatus and Xylan in small amounts to improve as a therapy to animals with colitis.Benefits of Genetic engineering:• Strengthen the effects of existing strains• Create completely new Probiotics. These need not necessarily be composed only of bacterial products but can also include elements of regulatory systems or enzymes derived from a foreign—human— source.• As vector for vaccines and growth hormones
  19. 19. Commercial Probiotic StrainsProbiotic Strain Commercial ProductL. acidophilus LA-5; NCDO 1748 FlorastorSaccharomyces cerevisiae (boulardii) Biocodex (Creswell OR)L. casei Shirota YakultB. breve strain YakultL. johnsonii Lj-1 (same as NCC533 and LC-1formerly L. acidophilus La-1) Nestlé (Lausanne, Switzerland) BioGaia Probiotic chewable tabletsL. reuteri ATCC 55730 ("Protectis") or dropsStreptococcus oralis KJ3 ProBiora3Streptococcus rattus JH145 Oragenics Inc. (Alachua FL)Lactobacilli rhamnosus PBO1 EcoVagLactobacilli gasseri EB01 Bifodan (Denmark)
  20. 20. Safety Guidelines
  21. 21. Status of Probiotics in India• Used as animal feed supplements for cattle, poultry and piggery.• Yakult Dannone released their Probiotic drink named Yakult.• The latest and recent addition to the list of probiotics in India is ViBact (which is made up of genetically modified Bacillus mesentricus), which acts as an alternate to B-complex capsules launched by US Vitamins.• Probiotic yogurts have been launched by Mother Dairy.
  22. 22. Indian and Global Probioticmanufacturers• Mirobax – Hyderabad • UAS Laboratories Inc. a• Unique Biotech – Hyderabad leading Probiotic company,• Alliance Bioscience Pvt Ltd - was founded by Dr. S.K. Dash Pondicherry in 1979.• Agri Life • Shandong Bolylely SOM Phytopharma (India) Bioengineering Co., Ltd China Limited – Hyderabad • Danisco• Ruchi Biochemicals – • Chr. Hansen A of Denmark Mumbai • Yakult Danone• Sami Labs Ltd.– Bangalore • US-based VSL• Tablets India Pharmaceuticals• Mother Dairy • Alkem Health Foods ( Prebiotics )
  23. 23. References• Martha I. Alvarez-Olmos and Richard A. Oberhelman. Probiotic Agents and Infectious Diseases. Clinical Infectious Diseases 2001; 32:1567–76.• V. C. Suvarna* and V. U. Boby. Probiotics in human health: A current assessment. CURRENT SCIENCE, VOL. 88, NO. 11, 10 JUNE 2005.• Iradj Sobhani et al. Microbial Dysbiosis in Colorectal Cancer (CRC) Patients. January 2011 | Volume 6 | Issue 1 | e16393.• David Philippe et al. Bifidobacterium lactis attenuates onset of inflammation in a murine model of colitis. World J Gastroenterol 2011 January 28; 17(4): 459-469.• Jana Cinova et al. Role of Intestinal Bacteria in Gliadin-Induced Changes in Intestinal Mucosa: Study in Germ-Free Rats. PLoS ONE 6(1): e16169. doi:10.1371/journal.pone.0016169.• David O’Mahony et al. Bifidobacterium animalis AHC7 protects against pathogen-induced NF-B activation in vivo. BMC Immunology 2010, 11:63.• S. Rerksuppahol et al. Lactobacillus acidophilus and Bifidobacterium bifidum stored at ambient temperature are effective in the treatment of acute diarrhea. Annals of Tropical Paediatrics (2010) 30, 299–304.• Laurie O’Sullivan. Prebiotics from Marine Macroalgae for Human and Animal Health Applications. Mar. Drugs 2010, 8, 2038-2064; doi:10.3390/md8072038.• John Christodoulou et al. Research Proposal Development of Diagnostic and Therapeutic Approaches to Trimethylaminuria. March 2009.• Guidelines for the Evaluation of Probiotics in Food. Report of a Joint FAO/WHO Working Group on Drafting Guidelines for the Evaluation of Probiotics in Food London Ontario, Canada April 30 and May 1, 2002.• Jose M Saavedra. Clinical applications of probiotic agents. Am J Clin Nutr 2001;73(suppl):1147S–51S.• Elizabeth Furrie. Probiotics and allergy. Proceedings of the Nutrition Society (2005), 64, 465–469.•••