AUTOIMUNITAS
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AUTOIMUNITAS
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DEFINISI
Adalah respon imun terhadap antigen jaringan
sendiri (self-antigen) yg di sebabkan o/
mekanisme normal yg gagal berperan u/
mempertahankan self tolerance sel B atau sel-
T atau keduanya.
Penyakit autoimun a/ kerusakan
jaringan/gangguan fungsi fisiologis ygditimbulkan o/ respon autoimun.
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SELF-TOLERANCE
(toleransi diri)
1. Toleransi imunologi : suatu keadaan saat
seseorng tdk mampu mengembangkan suatu
respon imun melawan suatu antigen yg
spesifik.
2. Self-tolerance (toleransi diri) :secara khusus
menunjukan kurangnya responsivitas imun
terhadap self-antigen tissue.
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klasifikasi
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Toleransi
1. Central tolerance.
2. Peripheral tolerance.
•
Anergi• Kematian sel yg diinduksi
• Penekanan perifer o/ sel regulator
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Mekanisme penyakit Autoimun
KEGAGALAN TOLERANSI:a. kegagalan kematian sel yg diinduksi o/aktivasi
b. gangguan pd anergi sel T
c. permintaan kebutuhan sel-B untuk sel T.
d. kegagalan supresi yg diperantarai sel-T
e. mimikri molekular
f. aktivasi limfosit poliklonal
g. pelepasan antigen terasing
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Faktor Genetik
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MIKROBA
• Virus dan mikroba : misalnya sterptokokus dan
organisme klebsiella.
• Antigen dan autoantigen
• Virus (EBV) dan produksi bakteri
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