Seminario biologia molecular fanconi
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Transcript of Seminario biologia molecular fanconi
![Page 1: Seminario biologia molecular fanconi](https://reader031.fdocuments.us/reader031/viewer/2022032010/55a5e9051a28abb6128b4777/html5/thumbnails/1.jpg)
Virginia C. Espinosa Navarro
Juan R. Gaviria García
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Support the witness of the internal wayopposite to all the circumstances that couldalter it.
Kidney Stabilizes the volume and thephysicist – chemistry caharacteristics of theLEC and LIC.
Sodium, potassium, chloride andbicarbonate.
Eliminates the excess of water, electrolytes,osmoles, metabolic products of waste andthe toxic products.
INTRODUCTION
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• Decrease reabsorption of electrolytes and nutrients in the blood torrent.
• Clinical characteristics:
Poliuria, polidipsia and dehydration
. Hypophosphate
mic, rickets, osteomalacia
Phosphaturia, Glucosuria, Proteinuria,
Hyperuricosuria
Decrease of thegrowth, acidose, hipopotasemia, hyperchloremia
FANCONI’S SYNDROME
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Cellular organela with a membraneconstituted by a double lipid layer.
Proteins of enzymatical function.
Liver, kidney, brain (formation of themyelin).
Lipid metabolism: fatty acid of very longchain beta-oxidation, plasmalogenformation, cholesterol and billiary acids.
PEROXISOMAS
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EHHADH
The protein bifunctional enzyme.
Enzymes of the peroxisomal beta-oxidationpathway.
The N-terminal enoyl-CoA hydrataseactivity.
The C-terminal region contains 3-hydroxyacyl-CoA dehydrogenase activity.
Peroxisomal disorders.
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RELATION
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Identify the molecular, biochemical,
and cellular defects that result in
impaired renal tubular reabsorption.
GENERAL OBJECTIVE
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MATERIALES Y
MÉTODOS
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PACIENTES
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ESTUDIOS GENÉTICOS
Extracción del ADN:1. Lisis celular.
2. Extracción de lípidos de membrana.
3. Extracción de proteínas mediante la adición de
una proteasa.
4. Precipitar el ADN con un alcohol.
Análisis de ligamiento de
multipunto
Secuenciación: determinación del orden
de los nucleótidos. MÉTODO DE SANGER.
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LÍNEA CELULAR
LLC-PK1 Mutación EHHADH
EHHADH Oxidación
peroxisomal de ácidos grasos.
Transporte de fluído (túbulo
proximal).
Función respiratoria
mitocondrial.
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INMUNOPRECIPITACIÓN
HADHA Y HADHB
Anti - HADHB
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KNOCKOUT
Función bioquímica de
EHHADH
Fosfato urinario y
metabolitos urinarios
Estudios óseos (45 – 51
semanas de edad).
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RESULTADOS
Autosómica
Dominante
1-74 años
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RESULTADOS
Niña afectada de 12
años.
Raquitismo y
crecimiento disparejo
por pérdida renal de
fósforo.
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RESULTADOS
Excreción
urinaria de
proteínas de 1.2
g por día.
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RESULTADOS
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RESULTADOS
LLC-PK1:
Sin mutar en mitocondria
Mutada en mitocondria y peroxisoma
Cos-7 y HEK293
No anormalidades morfológicas
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RESULTADOS
Cromosoma 3q27
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RESULTADOS
D3S3583
D3S2747
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RESULTADOS
Mutación por cambio de
sentido(p.E3K)
Glutamato → Lisina
25 aminoácidos
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RESULTADOS
Fosforilación
Oxidativa
Capacidad de
Transporte
Anticuerpo
Anti-HADHB
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RESULTADOS
Ratones Knockout:
No aminoaciduria oglucosuria
Valores normales deintermediariosenergéticos yglagolíticos en orina
La ausencia del genno tiene un efectosignificante.
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RESULTADOS
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DISCUSIONAuthor Idea Yes/No
19. Kleta R, Bockenhauer D. Renal Fanconi’s syndrome
comprises a heterogeneous
group of disorders
characterized by proximal
tubular dysfunction leading to
generalized
aminoaciduria, glucosuria,
phosphaturia, lowmolecular-
weight proteinuria, and
metabolic acidosis
due to renal bicarbonate
losses.19
Yes
25. Balaban RS, Mandel LJ. Remarkably, proximal tubular
cells do not
use glucose for their energy
production25; fatty
acid oxidation is the
predominant energy source.
Yes
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DISCUSION
Author Idea True/False
29. Houten SM, Denis S,
Argmann CA, et
al.
Despite these known roles of L-
PBE in peroxisomal
oxidation pathways, it plays a
minor role
in overall fatty acid oxidation
and energy production,
as indicated by the fact that
Ehhadh knockout
mice are viable and ostensibly
unaffected.29
Yes
31. Koopman WJ, Willems PH,
Smeitink JA.
The findings in this family
indicate that a
monogenic defect leading to
intracellular mistargeting
of a mutant protein can result in
mitochondrial
damage and isolated organ
disease
— in this case, renal Fanconi’s
syndrome.31
Yes
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CONCLUSIONS
Energy requirements are very important
because, many process in our bodies required
them and if they are deficient, it can cause a
very life-threatening damage like this
syndrome.
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CONCLUSIONS
A mutation in some
genes of a protein
makes them more
related to the
subunits of other
enzyme complex that
they weren´t used to
work with.
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CONCLUSIONS
Haploinsufficiency of genes are less
aggressive than a mutation, cells could
continue working if some proteins won´t be
expressed.
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CONCLUSIONS
Sometimes many
syndromes won´t be
studied because they
appear as a part of a
multisystem
metabolic disease,
ignoring that they
could have a
genomic component.
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Mapa conceptual
Virginia Espinosa
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Mapa Conceptual Juan Ricardo
Gaviria G.
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