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Samenvatting Regulatie en Afweer 1 (40410RA10Y): Histologie: stapeling.

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Samenvatting Regulatie en Afweer 1 (40410RA10Y): Histologie: stapeling.

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o Cellen die doodgaan vormen een goede bodem voor afzetting van
kalk.
• Calciumhuishouding is in principe normaal. Lokale beschadiging zorgt
ervoor dat op die plek calcium wordt afgezet, zoals bij aderverkalking.
▪ Metastatische calcificatie:
• Calciumhuishouding is verstoord.
• Weefsel rondom is intact.
• Mogelijke oorzaken:
o Osteoporose, nieraandoening, te veel PTH (→ belangrijk voor
calciumhuishouding). PTH: zorgt voor dat calcium wordt
opgenomen uit de botten.


AMYLOÏD EN AMYLOÏDOSE

- Amyloïd: verzameling van ziektebeelden die te maken hebben met verkeerde vouwing van eiwitten.
- Kristalachtig eiwitproduct na verkeerde vouwing dat buiten de cel neerslaat.
- Kleurstof: congo-rood. Dit komt in de kristallen en geeft een spectrum van kleuren weer: polarisering
van licht.




o
▪ Verkleuring laat verkeerd gevouwen eiwit zien.
- Amyloïdose: amyloïd in de vaatwand. Vaatwand is minder soepel en kan hoge bloeddruk minder goed
aan.
o Soepele vaatwand is belangrijk voor demping van bloed dat wordt rondgepompt
- Ziekte van Alzheimer: eiwitaggregatie (→ eiwitstapeling) in hersenen, plaques worden gevormd →
celdood, schade aan neuronen, etc.




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