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Prions in the Urine of Patients with Variant 
Creutzfeldt–Jakob Disease 
Laura Quintero 
Daniela Márquez Obando 
III Semestre
INTRODUCTION 
Creutzfeldt-Jakob Disease 
(CJD) 
• Degenerative neurological disorder. 
• CJD is caused by an agent called a 
prion. 
• Symptoms: progressive dementia, 
memory loss, personality changes, 
hallucinations, myoclonus, ataxia and 
changes in gait. 
• Epidemiology: occurring in about one 
out of every one million people every 
year
INTRODUCTION 
PRIONS (Proteinaceous infectious particles) 
• Infectious agent composed of protein in a 
misfolded form. 
• Pathogenic sialoprotein havyng altered secundary 
structure. 
• Acts on the same type of protein present in the 
body. 
• Its transmission has been linked to consumption of 
prion-contaminated cattle meat.
INTRODUCTION 
PRIONS 
Diferences betwen normal and pathological prions.
INTRODUCTION 
Relation CJD with Prions 
• Prions cause fatal neurodegenerative 
disease. 
• Prpc PrpSc in prions pathologies. 
• Limited proteolysis: Are added within the 
central nervous system to form amyloid 
plaques.
OBJECTIVE 
Investigate the presence of 
prions in patients with 
different transmissible 
spongiform encephalopathies, 
primarily in Creutzfeldt-Jakob 
disease.
MATERIALES Y METODOS 
PACIENTES
MATERIALES Y METODOS 
Western Blot o Inmunoblot 
Fundamento 
1. Separación por tamaño de proteínas por electroforesis 
en gel (SDS). 
2. Transferencia de proteínas a un filtro. 
3. Incubación con anticuerpos (reacción con proteínas). 
4. Detectar anticuerpo unido al filtro observando el gel.
MATERIALES Y METODOS 
PMCA
MATERIALES Y METODOS 
PCMA
RESULTADOS 
DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE 
LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) 
Solo la muestra control (banda 9) y la muestra de un paciente 
con la variante (banda 3) fueron positivos para PRPSC . Las 
muestras de otras enfermedades fueron negativas.
RESULTADOS 
• DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE 
DE LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) 
13/14 muestras de pacientes con la variante de la 
enfermedad fueron positivos para PRPSC . 
La técnica PMCA solo detecta en pacientes esta enfermedad.
RESULTADOS 
DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE 
LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) 
Se hicieron experimentos para mirar su las muestras de orina de 
diferentes grupos de control eran positivas, sin embargo fueron negativas.
RESULTADOS 
Después de la digestión con proteinasa K el comportamiento 
electroforético de la PRPSC (sin tener en cuenta el país) fue el esperado
RESULTADOS 
DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE 
LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) 
Para determinar si la PRPSC es detectable en diferentes momentos de la fase 
clínica de la enfermedad se tomaron dos muestras 
PRPSC + 
Características similares 
Mayor cantidad en la última muestra
RESULTADOS 
CONCENTRACIÓN DE EN ORINA DE PACIENTES CON LA VARIANTE DE 
LA ECJ 
se llevó a cabo por medio de pmca, su estimación se basó en lo obtenido en el 
western blot y las [] de priones recombinantes. 
Concentración en cerebro: 100 microgr/gr 
Concentración orina: 1 x10-16 gr/ml
DISCUSION 
AUTHOR COMMENT AGREEMENT OR 
DISAGREEMENT 
30. Newman PK, Todd NV, 
Scoones D, 
et al 
“The one patient with urine sample that was found to 
be negative has a disease duration of 114 months 
and was receiving treartment with 
intracerebroventricular administration of pentosan 
polysulfate, and agent that has been studied for the 
treatmen of variant CJD” 
disagreement 
5. Wadsworth JD, Joiner S, Hill 
AF, et al. 
31. Brandner S, Whitfield J, 
Boone K, et al. 
32. Head MW, Ritchie D, Smith N, 
et al 
This result is not entirely surprising, considering that 
variant Creutzfeldt–Jakob disease is acquired by 
infection (probably by oral ingestion), and studies 
have shown more extensive peripheral involvement 
in variant Creutzfeldt–Jakob disease than in the 
sporadic or inherited forms of transmissible 
spongiform encephalopathies 
disagreement 
5. Wadsworth JD, Joiner S, Hill 
AF, et al. 
32. Head MW, Ritchie D, Smith N, 
et al 
34. Notari S, Moleres FJ, Hunter 
SB, et al. 
Indeed, PrPSc is readily detectable by means of 
immunohistochemical or biochemical studies in 
lymph nodes, tonsil, spleen, portions of the intestinal 
tract, kidney, liver, pancreas, and skeletal muscle 
from patients with variant Creutzfeldt–Jakob disease 
disagreement
CONCLUSIONS 
• This work is a way to promote the investigation, reading and 
analysis of various topics related to our career. 
• This seminar allows us to apply prior knowledge to 
understand this content. With this we can strengthen 
important concepts of molecular biology. 
• The use of articles in English allow us improve our second 
language and to kwon vocabulary about science. 
• With this seminar we can to kwon better the molecular biology 
techniques and how these techniques works.
Prions in the Urine of Patients with Variant Creutzfeldt–Jakob Disease
Prions in the Urine of Patients with Variant Creutzfeldt–Jakob Disease

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Prions in the Urine of Patients with Variant Creutzfeldt–Jakob Disease

  • 1. Prions in the Urine of Patients with Variant Creutzfeldt–Jakob Disease Laura Quintero Daniela Márquez Obando III Semestre
  • 2.
  • 3. INTRODUCTION Creutzfeldt-Jakob Disease (CJD) • Degenerative neurological disorder. • CJD is caused by an agent called a prion. • Symptoms: progressive dementia, memory loss, personality changes, hallucinations, myoclonus, ataxia and changes in gait. • Epidemiology: occurring in about one out of every one million people every year
  • 4. INTRODUCTION PRIONS (Proteinaceous infectious particles) • Infectious agent composed of protein in a misfolded form. • Pathogenic sialoprotein havyng altered secundary structure. • Acts on the same type of protein present in the body. • Its transmission has been linked to consumption of prion-contaminated cattle meat.
  • 5. INTRODUCTION PRIONS Diferences betwen normal and pathological prions.
  • 6. INTRODUCTION Relation CJD with Prions • Prions cause fatal neurodegenerative disease. • Prpc PrpSc in prions pathologies. • Limited proteolysis: Are added within the central nervous system to form amyloid plaques.
  • 7. OBJECTIVE Investigate the presence of prions in patients with different transmissible spongiform encephalopathies, primarily in Creutzfeldt-Jakob disease.
  • 9. MATERIALES Y METODOS Western Blot o Inmunoblot Fundamento 1. Separación por tamaño de proteínas por electroforesis en gel (SDS). 2. Transferencia de proteínas a un filtro. 3. Incubación con anticuerpos (reacción con proteínas). 4. Detectar anticuerpo unido al filtro observando el gel.
  • 12. RESULTADOS DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) Solo la muestra control (banda 9) y la muestra de un paciente con la variante (banda 3) fueron positivos para PRPSC . Las muestras de otras enfermedades fueron negativas.
  • 13. RESULTADOS • DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) 13/14 muestras de pacientes con la variante de la enfermedad fueron positivos para PRPSC . La técnica PMCA solo detecta en pacientes esta enfermedad.
  • 14. RESULTADOS DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) Se hicieron experimentos para mirar su las muestras de orina de diferentes grupos de control eran positivas, sin embargo fueron negativas.
  • 15. RESULTADOS Después de la digestión con proteinasa K el comportamiento electroforético de la PRPSC (sin tener en cuenta el país) fue el esperado
  • 16. RESULTADOS DETECCIÓN DE PRPSC EN ORINADE PACIENTES CON LA VARIANTE DE LA ENFERMEAD DE CREUTZFELD-JAKOB (PMCA) Para determinar si la PRPSC es detectable en diferentes momentos de la fase clínica de la enfermedad se tomaron dos muestras PRPSC + Características similares Mayor cantidad en la última muestra
  • 17. RESULTADOS CONCENTRACIÓN DE EN ORINA DE PACIENTES CON LA VARIANTE DE LA ECJ se llevó a cabo por medio de pmca, su estimación se basó en lo obtenido en el western blot y las [] de priones recombinantes. Concentración en cerebro: 100 microgr/gr Concentración orina: 1 x10-16 gr/ml
  • 18. DISCUSION AUTHOR COMMENT AGREEMENT OR DISAGREEMENT 30. Newman PK, Todd NV, Scoones D, et al “The one patient with urine sample that was found to be negative has a disease duration of 114 months and was receiving treartment with intracerebroventricular administration of pentosan polysulfate, and agent that has been studied for the treatmen of variant CJD” disagreement 5. Wadsworth JD, Joiner S, Hill AF, et al. 31. Brandner S, Whitfield J, Boone K, et al. 32. Head MW, Ritchie D, Smith N, et al This result is not entirely surprising, considering that variant Creutzfeldt–Jakob disease is acquired by infection (probably by oral ingestion), and studies have shown more extensive peripheral involvement in variant Creutzfeldt–Jakob disease than in the sporadic or inherited forms of transmissible spongiform encephalopathies disagreement 5. Wadsworth JD, Joiner S, Hill AF, et al. 32. Head MW, Ritchie D, Smith N, et al 34. Notari S, Moleres FJ, Hunter SB, et al. Indeed, PrPSc is readily detectable by means of immunohistochemical or biochemical studies in lymph nodes, tonsil, spleen, portions of the intestinal tract, kidney, liver, pancreas, and skeletal muscle from patients with variant Creutzfeldt–Jakob disease disagreement
  • 19. CONCLUSIONS • This work is a way to promote the investigation, reading and analysis of various topics related to our career. • This seminar allows us to apply prior knowledge to understand this content. With this we can strengthen important concepts of molecular biology. • The use of articles in English allow us improve our second language and to kwon vocabulary about science. • With this seminar we can to kwon better the molecular biology techniques and how these techniques works.