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PRION DISEASE & PENTOSAN POLYSULPHATE IN THE UK Richard Knight NCJDSU University of Edinburgh Scotland
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PRION DISEASE & PPS IGENERAL INTRODUCTION IIPENTOSAN POLYSULPHATE IIIUK PATIENTS IVCONCLUDING POINTS
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I GENERAL INTRODUCTION
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DIFFERENT BACKGROUNDS DIFFERENT PERSPECTIVES
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TREATMENTS: HOW DO YOU EVALUATE THEM? IN THE ‘TEST TUBE’
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TREATMENTS: HOW DO YOU EVALUATE THEM? IN THE ‘TEST TUBE’
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TREATMENTS: HOW DO YOU EVALUATE THEM? PROTEINS & CELLS ARE NOT ANIMALS
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TREATMENTS: HOW DO YOU EVALUATE THEM? IN ANIMALS
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TREATMENTS: HOW DO YOU EVALUATE THEM? RODENTS ARE NOT HUMANS
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TREATMENT AT TIME OF INFECTION IS NOT THE SAME AS TREATING CLINICALLY ILL ANIMALS
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TREATMENTS: HOW DO YOU EVALUATE THEM? IN THE ‘TEST TUBE’ IN ANIMALS IN HUMANS
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X
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TREATMENT REAL DISEASE BENEFITSYMPTOM RELIEFTOXIC SIDE EFFECTS
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TREATMENT REAL DISEASE BENEFITSYMPTOM RELIEFTOXIC SIDE EFFECTS
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DISEASE PROCESS SYMPTOMS NOT ALWAYS EASY TO TELL THE DIFFERENCE
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TREATMENT REAL DISEASE BENEFITSYMPTOM RELIEFTOXIC SIDE EFFECTS
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TWO TREATMENT SITUATIONS CLINICAL ILLNESSPREVENTION ANY SIDE EFFECTS MAY BE OF DIFFERENT SIGNIFICANCE
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DISEASE TREATMENT PEOPLE VARY
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PERSON SPORADIC GENETIC IATROGENIC VARIANT TREATMENT DISEASES VARY
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TREATMENT REQUIRES DIAGNOSIS THE DIAGNOSTIC PROCESS IS NOT SIMPLE NO SIMPLE ‘CJD TESTS’
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TREATMENT IDEALLY REQUIRES EARLY DIAGNOSIS STOPPING BRAIN DISEASE PREVENTS FURTHER DAMAGE REPAIR OF EXISTING BRAIN DAMAGE IS PROBLEMATIC DIAGNOSIS OF CJD IS OFTEN ‘LATE’
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TREATMENT IDEALLY REQUIRES EARLY DIAGNOSIS STOPPING BRAIN DISEASE PREVENTS FURTHER DAMAGE REPAIR OF EXISTING BRAIN DAMAGE IS PROBLEMATIC DIAGNOSIS OF CJD IS OFTEN ‘LATE’
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TREATMENT IDEALLY REQUIRES EARLY DIAGNOSIS STOPPING BRAIN DISEASE PREVENTS FURTHER DAMAGE REPAIR OF EXISTING BRAIN DAMAGE IS PROBLEMATIC DIAGNOSIS OF CJD IS OFTEN ‘LATE’
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TREATMENT IDEALLY REQUIRES EARLY DIAGNOSIS STOPPING BRAIN DISEASE PREVENTS FURTHER DAMAGE REPAIR OF EXISTING BRAIN DAMAGE IS PROBLEMATIC DIAGNOSIS OF CJD IS OFTEN ‘LATE’ MAY BE SEVERE, IRREVERSIBLE, DAMAGE
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II PENTOSAN POLYSULPHATE
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PENTOSAN POLYSULPHATE: PPS BEECH WOOD DERIVED
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PENTOSAN POLYSULPHATE: PPS BEECH WOOD DERIVED ESTABLISHED DRUG NON-PRION DISEASE
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PENTOSAN POLYSULPHATE: PPS IN PRION DISEASE ?
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PENTOSAN POLYSULPHATE: PPS IN PRION DISEASE ?
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PENTOSAN POLYSULPHATE: PPS IN PRION DISEASE ?
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PENTOSAN POLYSULPHATE: PPS IN PRION DISEASE ? ?
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PENTOSAN POLYSULPHATE: PPS ORAL or IV: DOES NOT ENTER BRAIN
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PENTOSAN POLYSULPHATE: PPS ORAL or IV: DOES NOT ENTER BRAIN NEED DIRECT ACCESS TO BRAIN
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INTRA-VENTRICULAR ADMINISTRATION
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CURRENT PPS TREATMENT OF PRION DISEASE
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POTENTIAL PPS PROBLEMS PROBLEMS WITH CATHETER SURGERY: DAMAGE / BLEEDING POST SURGERY: INFECTION
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INTRA-VENTRICULAR ADMINISTRATION PROBLEMS WITH PUMP & CONNECTING TUBE
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POTENTIAL PPS PROBLEMS PROBLEMS WITH PPS BLEEDING SEIZURES OTHER TOXICITY
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III PPS TREATMENT IN THE UK
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UK PPS TREATMENT NO ORGANISED CLINICAL TRIAL COLLECTION OF INFORMATION ON A FEW INDIVIDUALS WHO CHOSE TREATMENT or WHOSE FAMILIES CHOSE TREATMENT
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ONE ORGANISED OBSERVATIONAL STUDY Published 2008
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INTRAVENTRICULAR PENTOSAN POLYSULPHATE IN HUMAN PRION DISEASES: AN OBSERVATIONAL STUDY IN THE UK I Bone, Belton L, Walker AS, Darbyshire J European Journal of Neurology 2008, 15:458-464 www.mrc.ac.uk/Utilities/Documentrecord/index.htm?d=MRC003453
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MRC STUDY PATIENTS 2 hGH CJD NO OBVIOUS BENEFIT 2 GSS NO OBVIOUS BENEFIT 3 vCJD 2/3 POSSIBLE BENEFIT (ALIVE LONGER)
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MRC STUDY PATIENTS 2 hGH CJD NO OBVIOUS BENEFIT 2 GSS NO OBVIOUS BENEFIT 3 vCJD 2/3 POSSIBLE BENEFIT (ALIVE LONGER)
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MRC STUDY PATIENTS 2 hGH CJD NO OBVIOUS BENEFIT 2 GSS NO OBVIOUS BENEFIT 3 vCJD 2/3 POSSIBLE BENEFIT (ALIVE LONGER)
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MRC STUDY PATIENTS 2 hGH CJD NO OBVIOUS BENEFIT 2 GSS NO OBVIOUS BENEFIT 3 vCJD 2/3 POSSIBLE BENEFIT (ALIVE LONGER)
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MRC STUDY PATIENTS 2 hGH CJD NO OBVIOUS BENEFIT 2 GSS NO OBVIOUS BENEFIT 3 vCJD 2/3 POSSIBLE BENEFIT (ALIVE LONGER)
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MRC STUDY PATIENTS SOME PROBLEMS DUE TO INTRAVENTRICULAR ADMINISTRATION (NO MAJOR ONES) NO PROBLEMS DUE TO PPS ITSELF
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MRC STUDY PATIENTS SOME PROBLEMS DUE TO INTRAVENTRICULAR ADMINISTRATION (NO MAJOR ONES) NO PROBLEMS DUE TO PPS ITSELF
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PRESENT UK SITUATION
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Intra-ventricular PPS Cases Treated in the UK Disease TreatedCurrently alive vCJD54 sCJD11 GSS20 hGH20
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Intra-ventricular PPS Cases Treated in the UK Disease TreatedCurrently alive vCJD54 sCJD11 GSS20 hGH20
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vCJD DURATION OF ILLNESS > 20 MONTHS September 2009
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vCJD DURATION OF ILLNESS > 20 MONTHS September 2009
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ALL UK vCJD DURATION OF ILLNESS September 2009
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Intra-ventricular PPS Cases Treated in the UK Disease TreatedCurrently alive vCJD54 sCJD11 GSS20 hGH20
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sCJD DURATION OF ILLNESS September 2009 +
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IV CONCLUDING REMARKS
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PPS NOT A CURE HIGHLY PROBABLE: PROLONGS DISEASE IN VARIANT CJD NO GOOD EVIDENCE FOR BENEFIT IN OTHER FORMS OF CJD NO EVIDENCE OF TOXICITY FROM PPS ITSELF INTRAVENTRICULAR ADMINISTRATION IS NOT EASY
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PPS NOT A CURE HIGHLY PROBABLE: PROLONGS LIFE IN VARIANT CJD NO GOOD EVIDENCE FOR BENEFIT IN OTHER FORMS OF CJD NO EVIDENCE OF TOXICITY FROM PPS ITSELF INTRAVENTRICULAR ADMINISTRATION IS NOT EASY
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PPS NOT A CURE HIGHLY PROBABLE: PROLONGS LIFE IN VARIANT CJD NO PRESENT EVIDENCE FOR OTHER FORMS OF CJD NO EVIDENCE OF TOXICITY FROM PPS ITSELF INTRAVENTRICULAR ADMINISTRATION IS NOT EASY
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PPS NOT A CURE HIGHLY PROBABLE: PROLONGS LIFE IN VARIANT CJD NO PRESENT EVIDENCE FOR OTHER FORMS OF CJD NO EVIDENCE OF TOXICITY FROM PPS ITSELF INTRAVENTRICULAR ADMINISTRATION IS NOT EASY
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PPS NOT A CURE HIGHLY PROBABLE: PROLONGS LIFE IN VARIANT CJD NO PRESENT EVIDENCE FOR OTHER FORMS OF CJD NO EVIDENCE OF TOXICITY FROM PPS ITSELF INTRAVENTRICULAR ADMINISTRATION IS NOT EASY
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FURTHER RESEARCH ON PPS IF POSSIBLE: RCTs ? OTHER ANIMAL RESEARCH
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FURTHER RESEARCH ON PPS IF POSSIBLE: RCTs ? EASIER ADMINISTRATION METHODS
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TREATMENT TRIALS WITH A STRUCTURED FRAMEWORK INTERNATIONAL COLLABORATION TRIALS WITH UNIFORM METHODS EUROPE: ‘THERAPRION’
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EARLIER TREATMENT EARLIER DIAGNOSIS
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EARLIER TREATMENT EARLIER DIAGNOSIS
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