transplants Flashcards

1
Q

for bone marrow transplants you must abolish

A

bone marrow with chemo

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2
Q

autograft

A

done-recipient is same person

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3
Q

syngenetic graft

A

identical twins

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4
Q

xenograft

A

different species

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5
Q

allograft

A

same species

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6
Q

failure to match leads to

A

rejection of transplant

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7
Q

features of good match

A
  1. same blood type
  2. same MHC
  3. negative cross match screen
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8
Q

donor cells express MHC I, if different from recipient..

A

CD8 cells will react

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9
Q

human leukocyte antigens make up

A

MHC class I and II molecules

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10
Q

genes on chromosome __ determine HLA type

A

6

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11
Q

some HLA subtypes are associated with

A

autoimmune disease

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12
Q

__ sets of HLA genes per parent

A

2

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13
Q

sibling has __ chance of match

A

25%

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14
Q

most imp HLA genes for solid organ transplants

A

HLA-A
HLA-B
HLA-DR

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15
Q

two problems with mismatch

A
  1. rejection of new cells
  2. graft vs host disease
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16
Q

path of graft vs host

A

donated T cells react with recipient cells

17
Q

sxs of graft vs host

A

rash, diarrhea, abd pain

18
Q

hyperacute rejection happens

A

within mins

19
Q

hyperacuture rejection is caused by

A

preformed antibodies in recipient

20
Q

hyperacute rejection sxs

A

blood vessel spasm
intravascular coag
ischemia

21
Q

acute rejection occurs

A

weeks to months after transplant

22
Q

path of acute rejection

A

recipient T cells react to graft causing cell mediated immune response

23
Q

biopsy of acute rejection shows

A

lymphocytes

24
Q

chronic rejection occurs

A

months to years after transplant

25
Q

chronic rejection shows

A

fibrosis of vessels