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Zebrafish lacking A...
Zebrafish lacking Alzheimer presenilin enhancer 2 (Pen-2) demonstrate excessive p53-dependent apoptosis and neuronal loss.
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Campbell, William A (författare)
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Yang, Hongwei (författare)
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- Zetterberg, Henrik, 1973 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för neurovetenskap och fysiologi, sektionen för psykiatri och neurokemi,Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry
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Baulac, Stéphanie (författare)
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Sears, Jacqueline A (författare)
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Liu, Tianming (författare)
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Wong, Stephen T C (författare)
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Zhong, Tao P (författare)
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Xia, Weiming (författare)
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(creator_code:org_t)
- 2006-02-08
- 2006
- Engelska.
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Ingår i: Journal of neurochemistry. - : Wiley. - 0022-3042. ; 96:5, s. 1423-40
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Gamma-secretase cleavage, mediated by a complex of presenilin, presenilin enhancer (Pen-2), nicastrin, and Aph-1, is the final proteolytic step in generating amyloid beta protein found in brains of Alzheimer's disease patients and Notch intracellular domain critical for proper neuronal development. Here, we employ the zebrafish model to study the role of Pen-2 in neuronal survival. We found that (i) knockdown of Pen-2 using antisense morpholino led to a reduction of islet-1 positive neurons, (ii) Notch signaling was reduced in embryos lacking Pen-2 or other gamma-secretase components, (iii) neuronal loss in Pen-2 knockdown embryos is not as a result of a lack of neuronal precursor cells or cell proliferation, (iv) absence of Pen-2 caused massive apoptosis in the whole animal, which could be suppressed by simultaneous knockdown of the tumor suppressor p53, (v) loss of islet-1 or acetylated tubulin positive neurons in Pen-2 knockdown embryos could be partially rescued by knockdown of p53. Our results demonstrate that knockdown of Pen-2 directly induces a p53-dependent apoptotic pathway that contributes to neuronal loss and suggest that Pen-2 plays an important role in promoting neuronal cell survival and protecting from apoptosis in vivo.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Psykiatri (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Psychiatry (hsv//eng)
Nyckelord
- Alzheimer Disease
- Animals
- Animals
- Genetically Modified
- Apoptosis
- genetics
- Blotting
- Northern
- Blotting
- Western
- methods
- Body Patterning
- drug effects
- genetics
- Cell Count
- methods
- Disease Models
- Animal
- Dose-Response Relationship
- Drug
- Embryo
- Nonmammalian
- Fish Proteins
- chemistry
- deficiency
- physiology
- Gene Expression Regulation
- Developmental
- drug effects
- genetics
- Immunohistochemistry
- methods
- In Situ Hybridization
- methods
- In Situ Nick-End Labeling
- methods
- Indoles
- diagnostic use
- Membrane Proteins
- chemistry
- deficiency
- metabolism
- physiology
- Neurons
- metabolism
- Oligonucleotides
- Antisense
- pharmacology
- Presenilin-2
- RNA
- Messenger
- metabolism
- Receptors
- Notch
- metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- methods
- Tumor Suppressor Protein p53
- chemistry
- metabolism
- Zebrafish
- Zebrafish Proteins
- deficiency
- metabolism
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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