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Disclosures

Disclosures. Speakers Fees; Sandoz, Astellas, Chiesi. Advisory Board Fees; Astellas, Chiesi,Nordic Pharma Grants; Dutch Kidney Foundation, Astellas, Eu FP-7. “ There ’ s an awful lot of money in shit. ” (Roy, House of God, Chapter3, Page 35).

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Disclosures

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  1. Disclosures • Speakers Fees; Sandoz, Astellas, Chiesi. • Advisory Board Fees; Astellas, Chiesi,Nordic Pharma • Grants; Dutch Kidney Foundation, Astellas, Eu FP-7

  2. “There’s an awful lot of money in shit.” (Roy, House of God, Chapter3, Page 35)

  3. Feces transplantation in nephrologyNo guts no glory Frederike Bemelman Internist-nephrologist, Clinical Immunologist f.j.bemelman@amc.uva.nl

  4. The gut microbiota: extremely popular and associated to a wide range of diseases A role in obesity Backhed PNAS 2007 Insulin resistance ChristophePlosOne 2011

  5. Outline presentation gut and its microbiota • Terminology and normal function • Changes in renal failure • Solid organ transplantation • Evidence and therapeutic potential • Conclusions

  6. Terminology (1) • Microbiota: collective microbial community inhabiting a special environment • Microbiome • Genome of the microbiota • Synonym of microbiota • Metagenome: total of DNA extracted from an environment • Metagenomics: study of the metagenome • Targeted: 16S ribosomal RNA en DNA • Untargeted: shotgun sequencing • Deep sequencing

  7. Terminology (2) Probiotics live micro organisms Prebiotics non digestible food ingredients

  8. Taxonomic ranking:Different techniques yield different resolutions

  9. Tremendous phyla diversity but functional homogeneity Shotgun Metagenomics: Functional homogeneity 16S rRNA analysis of the mouth and gut: phylum level Lozupone, Nature 2012

  10. The gut microbiota • Remarkable variety within and between individuals • Intra individual variations might be more important than inter individual • Number of unique configurations is large • No easy classification in a manageable number of distinct phenotypes

  11. The human gut microbiota a mutually beneficial co-existence • Digestion capabilities • Production of and increasing access to essential nutrients • Shapes the immune system

  12. The microbiota shapes the immune system of our gut Neonatal maturation of Peyers Patches mesenterial lymphnodes, IgA producing B cells Differentiation of effector T and regulatory T cells Enhancement of bactericidal function of neutrophils Reduction of threshold for Dendritic Cell activation Alegre AJT 2014

  13. > 1012/ml bacteria separated by 10 μm over a surface area of 200 m2

  14. Components of the functional Barrier;commensal bacteria have an essential role • Stratification • Mucus production by goblet cells • Anti Microbial Peptides • IgA molecules formed by plasma cells in the lamina propria • Maintenance of tight junctions • Competition with pathogenic strains • Suppression of innate responses

  15. Bacterial products can induce regulatory T cells

  16. Outline presentation gut and its microbiota • Terminology and normal function • Changes in renal failure • Solid organ transplantation • Evidence and therapeutic potential • Conclusions

  17. Renal failure • Increased oxalate and uric acid secretion by colonic epithelium • Increased uremic toxins resulting in dysbiosis • Increased NH4OH production • Enhanced proteolyticfermentation pathway • Th1 type response by direct binding of LPS to macrophages driving a TH1 and a TH17 response • Decreased barrier function • Frequent endotoxemia • Translocation of micro organism

  18. Uremia: intestinal barrier dysfunction • Frequent endotoxemia in the absence of overt infection • Detection of bacteria in mesenteric lymph nodes of uremic rats • Increased intestinal permeability to uremic solutes Curr Opin Nephrol Hypertens 2012, 21:587–592

  19. Uremic solutes are associated with • Increasedmortality in CKD • Cardiovasculardisease • Progression of CKD • Endothelialdysfunction • Oxidative stress Microbiotain CKD Decreased diversity

  20. Associations IgA and IBD • Coeliakie and dermatitis herpetiformis both associates with HLA-DQ2 and or DQ8 • Glutenpeptides (gliadine) HLA-DQ2/8 complexes evoke specific CD4 T cells resulting in inflammation and increased permeabilitiy for all other antigens • Tissue transglutaminase 2 beaks giladin down inimmunodominant peptides • IgAN patients have increased intestinal permeability, increased IgA reactive with gliadine and other alimentary antigens (bovine, lactoglobulin) 20-30% • IGAN in mice can be elicited by ovalbumin, bovine gamma globulin and horse spleen ferritin

  21. Outline presentation gut and its microbiota • Terminology and normal function • Changes in renal failure • Solid organ transplantation • Therapeutic potential • Conclusions

  22. The microbiota and solid organ transplantation:an unexplored area Search for microbiota Search for organ transplantation AND microbiota

  23. The microbiota and solid organ transplantation:only few facts • Substantial changes prior and 6 months after renal and liver transplantation but wide inter-individual variation • Decreased diversity in renal, lung, liver transplantation • In gut transplantation Firmicutesabundance was correlated to rejection Fricke AJT 2013 BorewiczMicrobiolLett 2013 Wu MicrobEcol 2013 Oh AJT 2012

  24. Analysis of the microbiota in renal allograft recipients Lee et al Transplantation 2014 Fewer bacteroidetes in diarrhea Less diversity as compared to references More lactobacillus in rejection

  25. Enterococci in gut and urinary tract Lee Transplantation 2014

  26. Important fields to explore in nephrology and solid organ transplantation • Is there a link between the local gut alloresponse and the systemic alloresponse • Do intestinal Tregs recognizing microbial peptides give rise to systemic effects? • Is there cross reactivity ? • Ischemia reperfusion damage might be attenuated by short chain fatty acids Andrade–Oliveira J Am Soc Nephrol 2015 • Microbiota might affect (immunosuppressive) drug metabolism

  27. Outline presentation gut and its microbiota • Terminology and normal function • Changes in renal failure • Solid organ transplantation • Therapeutic potential • Conclusions

  28. Prebiotics Therapeutic arsenal Probiotics Postbiotics Fecal Microbiota Transplantation

  29. Fecal Microbiota Transplantation • First report by Ge Hong 4th century in Zhou Hou Bei Ji Fang (Handy medicines in emergencies) • Ralph Lewin: “fresh warm camel feces as Bedouin remedy against dysentery” • Eiseman et al 1958: pseudomembranous colitis

  30. Efficacy > 90 % Minor side effects Two renal transplant recipients

  31. Can FMT eradicate the gut of ESBL E.Coli? • Urinary tract infection the most frequent infection after renal transplantation • Associated with loss of transplant function • The incidence of ESBL E.Coli is rising, resulting in longterm admission for intravenous administration of antibiotics • Feasibility Analysis of NasoduodenalFecesAdministration to eradicate Resistant Enterobacteriaeceae(FANFARE) • Aim: Eradication of the gut of renal tranplant recipients from pathogenic E.coli

  32. ♀ 59y 1982 postmortal renal transplantation Recurrent urinary tract infections (≥4x/y) Despite antibiotic treatment / prophylaxis Tx 1-1-1985 1-1-1990 1-1-1995 1-1-2000 1-1-2005 1-1-2010 1-1-2015 Urine Feces ESBL E.coli E.faecalis Negative culture K.pneumoniae Non-ESBL

  33. KEY POINTS • Renal failure and solid organ transplantation are associated with profound changes in the gut microbiota • Decreased diversity • Enhanced permeability • Possibly enhanced systemic toxins • Fecal MicrobiotaTransplantation • effective eradication of Clostridium difficile (and possibly of other pathogenic strains) • Increases insulin sensitivity • Microbiota and the alloresponse?

  34. Work in progress

  35. Safety • Retrospective multicenter study • 80 subjects • HIV/AIDS (3) • IBD (36) • SOT (19) • Oncologic condition (7) • Other (15) • Efficacy after a single (78%) or double FMT (89%) Side effects : 1 death after sedation for colonoscopy, one unrelated Kelly American Journal of Gastroenterology 2014

  36. SCFA functions • Improvement of renal function after injury (IR) • Less systemic inflammation, oxidative stress an apoptosis • More autophagy • In vivo: • Less HDAC activity • Less maturation of DC • Less CD4 and CD8 cell proliferation • Better mitochondrial biogenesis of kidney epithelium

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