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Samenvatting Histologie - Bindweefsel

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Samenvatting van H2 Histologie Bindweefsel van Cytologie en Histologie. 1e bach revalidatie en kinesitherapie. Notities en extra info uit de les zijn in samenvatting verwerkt

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H2 histologie
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February 7, 2020
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2019/2020
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Bindweefsel
 Bestaat uit: extracellulaire matrix (vezels, grondsubstandtie, weefselvloeistoffen)
 Mechanische fctie: steun


Vezels

Collageen

 Types
o CO I: dermis, bot, vezelig kraakbeen,
o CO II: hyalien en elastisch kraakbeen
o CO III: glad spierweefsel, arterien, lever, milt, nier
o CO IV: lamina basalis epitheel en endotheel
o CO V: lam basalis placenta

 AZ: Glycine, proline, hydroxyproline en lysine

 Collagene vezels:
o Meest voorkomend
o Nt elastisch
o Grote trekvastheid
o Lange onvertakte fibrillen
o Golvend
o Soms grotere bundels

 Reticulaire vezels
o Dunne vezels (soms netwerk)
o Steun aan beenmerg en samenhang met reticulumcel
o Bijzondere vorm van collagene vezels
o Associatie van collageentype III met glycoprot en proteoglycanen


 Genetische bindweefselaandoeningen
o Hypermobiele type in gewrichten: hyperlaks door ter weinig collageen

, Elastine zie p 206 foto

o Trekkracht
o Secretie:pro-elastine (globulair eiwit) polymerisatie
o AZ: proline – glycine (vgl met collageen), valine en
alanine
o Desmosine (alleen in elastine)

 Elastische vezels
o Dunner en strakker dan coll
o Netwerk
o Geen dwarse bandtekening
o Amorfe centrale massa (elastine)
o Omgeven door schede van 10nm tubulaire micro-fibrillen




Grondsubstantie= cement

 Glycosaminoglycanen (proteoglycanen, 80% eiwit, 20% koolhydraten) – zie p 210

= Linaire polysachharide:
- Gevormd uit disschariden
- Covalent gebonden aan eiwitas
- Bevatten hydroxyl, carboxyl en sulfaatgroep (sterk hydrofiel, veel binding van Na+)
- Belangrijkste protoglycanen: gebonden aan dermatan-, chondroïtine -of heperansulfaat
o Synthese:
- Eiwitcomponent: RER
- Glycosylering: RER en Golgi
- Sulfatering: Golgi-app

o Afbraak: in verschillende celsoorten dmv lysosomale enzymen
o Turn-over:
- 2 dagen voor hyaluronzuur (minder complex)
- 7-10 dagen voor gesulfateerde proteoglycanen
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