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IgM } HLA T^VI 肖D ア quot

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IgM } HLA T^VI 肖D ア quot
Japanese Journal of Transfusion Medicine, Vol. 52. No. 3 52
(3)
#405%413, 2006
)
*
IgM } HLA T^V I ÑD€±ê"€îk¶ÓFDw$
%PTR u§C05OþjU`]_aT^Võ HLA Ñ'¾)
Äà
í1)3) {e ý2)
±³ Àx1)
»
©1)
ô+ ù1)
ÉÎ hª3)
ÐÛ Áø3)
ÔÛ
Õ1)
{ÿ |›1)
òÞ Žó3)
½m ¬Œ1)
!Î Èð1)
×!„Æ®Ÿ€iWaX$
1)
S_a[Vt¥q¦
2)
·«Ôsdsñ!ûds
3)
(ô¿ 17 å 10  20 ä¨ï)
(ô¿ 17 å 12  19 ä¨()
HLA T^V I Ñ2€±ê"€îk¶Ó(platelet transfusion refractoriness#PTR)Cw$9O6
@C=.>E¼Ï4Dù•2-O2!IgM }D HLA T^V I Ñ(IgM-HLA Ñ)D PTR FDw
$C=.>Dù•EG@RAB.":6?!PTR u§ 121 ¹DÝ~ö̀ÂD HLA ÑVT_$Z
aUQ!¢¾*›Q%.; Mixed passive hemagglutination assay(M-MPHA)û!Flow cytometric
reagents for detection of panel-reactive antibody against HLA Class I antigens(FlowPRA)û!Antihuman immunoglobulin lymphocyte cytotoxity test
(AHG-LCT)
ûCLN‘.!IgM-HLA ÑD PTR
FDw$C=.>E!"€ 24 ¡vˆD÷Á€±êËn¼(CCI24hours)CLO€±ê"€Šp1MºÌ
8;":D~p!M-MPHA ûCLN 121 ´-Ö 48 ´-1M IgM-HLA Ñ2‚°7P;"fú!FlowPRA ûCLN‚°?3; IgM-HLA ÑE!:PM 48 -Ö 35 -!AHG-LCT û?E 20 -DI?-<
;"€±ê"€ŠpE!IgM-HLA ÑQö#9O!48 ´-Ö 7 ´- 74 "€C0.>çÙ?3;"IgML)Q£8"€Š
HLA ÑDâc¾CÒk9O†Q ;B."€?E!CCI24hours 2 19.7*4.7(+109!
L)Q£8"€Š
pQáO6@2?3;2!Òk9O†Q ="€?E!CCI24hours 2 2.0*1.9(+109!
pQáMPB1<;"PTR u§C“ìÜC͚9O IgM-HLA ÑE!PTR D†gCBO@/M
P!:Dè¼bµE AHG-LCT ûCLN‚°?3B1<;"M-MPHA Q HLA ÑVT_$ZaU!
€±ê"€D™D‰—ž…C%.O6@?!PTR ´-D†grÅ@"€ŠpD‹µC’ƒ?3Oo
æ¾2-O"
&!(!'# IgM-HLA Ñ!IgG-HLA Ñ!€±ê"€îk¶Ó(PTR)
!¢¾*›–”¨¸Æ€y
z­û(M-MPHA)
!FlowPRA
$"%#
u§2ö#9O HLA T^V I ÑDþjU`
°?3O@/MP!H;!Ølék¾?-N1)!
Ï4E¤‡Ñ?-O6@1M4)!€±ê"€î
]_a(Ig)T^VC=.>E.4=1Dù•2-
k¶Ó(platelet transfusion refractoriness#PTR)
N!IgM }D HLA T^V I Ñ(IgM-HLA Ñ)
FDw$ß!,²ÚCE¯&7P>6B1<;"
2 HLA T^V I ÑÊÑD 38'71, Í š 9 O
:D;JÏ4DœÇ?E!HLA ÑVT_$Za
"f ë C!IgM-HLA
UC™8!non-cytotoxic HLA ÑD‚°D;J
ÑE!_a[y˜ü㞅(LCT)K84E
C!LCT ûCn/!Monoclonal antibody-specific
\YþjU`]_a&LCT(AHG-LCT)CLN‚
immobilization of platelet antigens(MAIPA)!
6@2ù•7P > . O
1)
'3)
406
Japanese Journal of Transfusion Medicine, Vol. 52. No. 3
Lymphocyte immunofluorescence test(LIFT)!
FlowPRA æLjp%_[bkbm%(FCM#
Flow Cytometric Reagents for Detection of Panel-
FACSCalibur#Becton Dickinson & Co., Sunny-
Reactive antibody against HLA Class I antigens
vale!CA)Z¢í>B"Ö§˜ÃH>F!FITC-
(FlowPRA)ÐKšƒÎæZí3FT!IgG ŽK
conjugated goat F(ab'
)
2 anti-human IgM(Bio-
HLA ]l` I ˜Ã(IgG-HLA ˜Ã)KRZ“¯K
source!CA#IgM-FlowPRA)
H FITC-conjugated
Ä´H>!IgM-HLA ˜ÃL“¯Ä´H>F3I
goat F(ab'
)
2 anti-human IgG(Biosource!CA#
3 "
5)
IgG-FlowPRA)Z í 3!IgM-HLA ˜ à H IgG-
uå!Miller V!Godeaus VL!IgM-HLA ˜Ã
HLA ˜ÃZá$J`]m%eq^>B"
K PTR NK…ìK{Ù¸Z©>1)2)!QBÑê
VL!IgM-HLA-A24 ˜ÃJUX PTR ³öZä›
>B6)"
2)HPA ˜Ã
HPA-1a!2a!2b!3a!3b!4a!4b!5a!5b!
6a!6b!Naka ˜•Zéï>B 12 ®õK O Ž
œ€!IgM-HLA ˜Ã7 PTR K•vH>F9
…ì>F3X{Ù¸H!PTR J…ì ? X IgMHLA ˜ÃKÂ97 AHG-LCT æGL“¯G8I
3;H7çV6JIDBKGä›?X"
J
K
1!DA
2002 Ø 4 ‘6V 2005 Ø 3 ‘QGK 3 ؄G!
Êê”ÕKtó‡…6V PTR K•vŠçKB
²ÜZ]pp\q°ñ>!IgM-M-MPHA æ!IgGM-MPHA æJUX`]m%eq^Z™DB"
4!HLA F:3@I#HLA-PC$
10?%7;>
6
IgM-M-MPHA æ!IgG-M-MPHA æ!AHG-LCT
æZí3B"
5!L38/%HE
ë 24 ¦„–K CCI(㹐²ÜÀz·)ÇZ
S!“žrð72DB 121 ³ö(Ƹ 49!
±¸ 72)
"
§K«JUWˆSÛÌ>B(CCI24hours)
KâÁϏºJE3F!HLA ˜Ã!HPA ˜Ã`
L)/*됖²Ü·(109!
L)
,ë
CCI(109!
]m%eq^Z™DB"
L)
+
-Ãßè¼(m2)
.됐²
¿²Ü·(109!
2!HLA *&,.(
Ü·(1011)
‚¬5UMcd%K HLA ]l` I a[iq^
QB!IgM-HLA ˜Ã7Á >B³öJE3F
L!×½ŒËbo[5UMª|»bo[Zí3!
L!~‹J=6KPW!ëJí3VYB²Ü
LCT æ JUW™DB"
»Ÿ(PCs)K HLA ŽH@K PCs JUX됗}
7)
3!9C)'-"+.(
ZÉO!IgM-HLA ˜ÃKÔs¸JÄw?X˜•
1)HLA ˜Ã
Z¥E PCs 7ë=YB³öK CCI24hours H!Äw
12 ®õK O Žmqg‰!²ÜZí3!˜hb
?X˜•Z¥B I 3 PCs 7 ë  = Y B ³ ö K
IgM ˜Ãƒ¡¨¸ò£IVMJ˜hb IgG ˜Ã
CCI24hours Z݁“Ò>B"
ƒ¡¨¸ò£Z¢í?X Mixed passive hemag-
2
glutination assay
(IgM-M-MPHA!IgG-M-MPHA)
1!IgM-M-MPHA 5<=FB4%5G
/
æ8)&10)!FlowPRA æ11)!AHG-LCT æ12)K 4 æ J
37060 àQBL 37090 àKƒ¡µ’JUW!
UWu§`]m%eq^Z™DB"QB!u§`
32 چ­QGK HLA-A2 ˜ÃZ“¯G8B7!
]m%eq^K}6V!³ö<HJÔs¸ÓÌ
40!220 GL!@YAY 4 Ú!8 چ­QGK
JÞîI˜•Z¥EgfnZ¶BJ¾Å>!IgM-
HLA-A2 ˜Ã>6“¯G8I6DB(Table 1)
"
M-MPHA æ!IgG-M-MPHA æ!AHG-LCT æ K
2!9C)'-"+.(
3 æJUXÖ§`]m%eq^Z™DB"
IgM-M-MPHA æ J U W 121 ³ ö È 48 ³ ö
IgM-M-MPHA æJ5:Xƒ¡xÎHƒ¡¦„
(39.71)6V IgM-HLA ˜Ã7“¯=Y!@K4
L!AHG-LCT ôy 8 ÚK IgM Ž HLA-A2 ˜ÃZ
C 25 ³öGL IgG-M-MPHA æJUW IgG-HLA
í3F¤Íµ’Z“Ò–!37060 àH>B"
˜ÃT“¯=YB(Table 2)
";YV 48 öÈ!IgM-
ƒ‹Œd`_kl
z52a z 3 i
407
FlowPRA Š D H Ž v 3 ‘!IgM-FlowPRA Š A
[ v D 23 s ‘ |!AHG-LCT C J L!b C h
IgG-FlowPRA ŠAICŽv 32 ‘!IgG-FlowPRA
HLA-A2 1€}6N?-<s‘ A22 Oq3 12 s
ŠDHŽv 8 ‘@,><"IgM-FlowPRA Š@E!
‘C/-?!IgM-M-MPHA ŠO-M5A@!5
IgM-M-MPHA ŠCJLen6N< 48 ‘| 13 ‘
NG@€}9M5A1@2B0>< HLA hxD
D IgM-HLA hx1en@2B0><"cC!IgM-
‚YvO€}9M5A1@2<&Table 4'
" G<!
FlowPRA ŠCJLen6N< 35 ‘D IgM-HLA
5NK 13 s‘D IgM-M-MPHA ŠCJMŽv„
hxE9F?!IgM-M-MPHA ŠCJLen9M
\E!s‘ A1 Oq2!dr…OQWWPXo9
5A1@2<"Z‰!AHG-LCT Š@E!IgM-M-
M5ACJLw?[v]7<"
MPHA ŠCJLen6N< 48 ‘D.=!20 ‘D
IgM-HLA hx70en@2B0><"
M-MPHA ŠCJL!IgM-HLA hxA IgG-HLA
hx1en6N< 25 s‘| 13 s‘C/-?!
IgM-M-MPHA ŠG<E IgM-FlowPRA Š1Ž
IgM-HLA hxA IgG-HLA hxD‚YvO:N
v!I73EŠ1ŽvDtjO IgM-HLA hx
;N€}@2<&Table 5'
"IgM-HLA hxA IgG-
ŽvA7!IgG-M-MPHA ŠG<E IgG-FlowPRA
HLA hxD‚Yv1€8s‘1 5 s‘!‚Yv1
Š1Žv!I73EŠ1ŽvDtjO IgG-HLA
w3YBMs‘1 7 s‘!Z‡1YBMs‘1 1
hxŽvA9M5ACJLQUSˆ47< HLA
s‘@,><"IgM-HLA hxA IgG-HLA hxD
h x Ž v u E!IgM-HLA h x D H Ž v 1 8 ‘
‚Yv1€8s‘D{p†E 2#3 @,><1!‚
&9+'
!IgM-HLA hx(IgG-HLA hxŽv1 40
YvDYBM s ‘ @ E w ? 1 p v @ , > <"
‘&43+'
!IgG-HLA hxDHŽv1 45 ‘&48+'
IgM%!IgG-M-MPHA ŠDw?DŽv„\E!d
@,><&Table 3'
"
r…OQWWPXo9M5ACJL[v]7
IgM-M-MPHA Š1Žv@!IgG-M-MPHA Š1
<"
3!
%#$"
Ta
bl
e1 Opt
i
mum c
o
ndi
t
i
o
ns f
o
r t
he I
gMMMPHA s
c
r
e
e
ni
ngt
e
s
tus
i
ngI
gM a
nt
i
HLAA2s
e
r
um
Se
r
um t
i
t
r
a
t
i
o
n
Ne
ga
t
i
ve
Te
mpe
r
a
t
ur
e Mi
nut
e
s
c
o
nt
r
o
l1
:4 1
:8 1
:1
61
:3
2
4
℃
2
2
℃
3
7
℃
3
0
6
0
(-) (-) (-) (-) (-)
(-) (W) (-) (-) (-)
3
0
(-) (W) (-) (-) (-)
6
0
(-) (2
+)(W) (-) (-)
3
0
6
0
9
0
(-) (2
+)(W) (-) (-)
(-) (2
+)(2
+)(2
+)(W)
(-) (2
+)(2
+)(2
+)(W)
IgM-M-MPHA ŠCJL!IgM-HLA hxD‚Y
v1€}@2< 26 s‘| 7 s‘D PCs ŒdC/
-?!IgM-HLA hxD‚YvCy\9Mhf[
v PCs A!y\9MhfŽv PCs DŒdg^Oe
~@2<&Table 6'
"IgM-HLA hxD‚YvCy
\9Mhf[vD PCs @E!CCI24hours 1 19.7)4.7
L'
Om7Œdg^OM5A1@2<1!
&*109!
IgM-HLA hxD‚YvCy\9MhfŽvD
L'Om7Œ
PCs @E!CCI24hours 1 2.0)1.9&*109!
dg^OKNB0><"
h x S Q V $ T X R C J L!IgM-HLA-B5
Cross Reactive Group Antigen&CREG'hxDH
Ta
bl
e2 Co
mpa
r
i
s
o
no
fI
gMHLA a
nt
i
bo
dyde
t
e
c
t
i
o
ni
n1
2
1s
e
r
as
a
mpl
e
sf
r
o
m PTRpa
t
i
e
nt
s
Numbe
rde
t
e
c
t
e
dbyo
t
he
rme
t
ho
dsc
o
mpa
r
e
dt
ot
heme
t
ho
da
tl
e
f
t
Me
t
ho
d
Numbe
r
de
t
e
c
t
e
d
MMPHA
I
gM- I
gM-& I
gG-
Fl
o
wPRA
I
gG-
I
gM- I
gM-& I
gG-
I
gG-
AHGLCT
I
gMMMPHA
4
8
2
3
2
5
0
3
3
2
8
2
0
I
gMFl
o
wPRA
3
5
1
2
2
3
0
3
3
2
0
1
8
408
Japanese Journal of Transfusion Medicine, Vol. 52. No. 3
Ta
bl
e3 Summa
r
yo
ft
hee
s
t
i
ma
t
e
di
mmuno
gl
o
bul
i
nc
l
a
s
s
e
so
f9
3HLA a
nt
i
bo
di
e
sde
t
e
c
t
e
di
n
1
2
1s
e
r
as
a
mpl
e
sf
r
o
m PTRpa
t
i
e
nt
s
I
gc
l
a
s
so
f
HLA a
nt
i
bo
di
e
s
I
gM
8
(9
)
I
gM+I
gG
4
0
(4
3
)
I
gG
4
5
(4
8
)
To
t
a
l
9
3
(1
0
0
)
MMPHA
Numbe
ro
f
r
e
a
c
t
i
o
npa
t
t
e
r
ns
Numbe
r
(%)
I
gM-
Fl
o
wPRA
I
gG-
I
gM-
I
gG-
5
(+)
(-)
(-)
(-)
3
(+)
(-)
(+)
(-)
9
(+)
(-)
(+)
(+)
6
2
2
3
(+)
(+)
(+)
(-)
(+)
(+)
(-)
(-)
(+)
(+)
(+)
(+)
3
8
7
(-)
(-)
(+)
(-)
(-)
(-)
(+)
(+)
Ta
bl
e4 Spe
c
i
f
i
c
i
t
i
e
so
fI
gMHLA a
nt
i
bo
di
e
spo
s
i
t
i
veo
nI
gMMPHA a
ndne
ga
t
i
veo
nI
gGMMPHA
MMPHA
Pa
t
i
e
ntHLA t
ype
Pa
t
i
e
nt Bl
o
o
d
Ge
nde
r
I
.
D. Type
A
B
Cw
A1
A3
O+
B+
M
M
2
4 1
1 5
1 5
2
2
5
4
A4
A5
A6
A9
A1
0
A1
1
A1
9
A2
0
A+
A+
A+
O+
A+
A+
B+
A+
F
F
F
F
M
M
F
F
2
2
6
2
2
4
1
1
1
2
4
2
A2
1
A2
2
A2
3
A+
O+
B+
F
M
F
2 2
4 6
1 5
5
2
4 1
1 5
1 5
2
2 2
4 3
5 4
6
2
4 6
1
3
1 3
5
3
5
3
1 4
8
1
1 7
3
3 5
8
2
6 5
2
2
4 5
2
I
gM-
1
NT†
9
5
2 1
0
6
2 9 4
4
8 9
5
2
3
5 7 9
5
5 1 1
0
6
2 8
5
4 1
1
1
1
9
8
Fl
o
wPRA
I
gG-
T‡
NT
AHGLCT
I
gM- I
gG-
Spe
c
i
f
i
c
i
t
y
* 2
2
0
/
2
0
0
/
2
00
/
2
0(-)(-)
1
0
/
2
0 0
/
2
0 0
/
2
0(-)(-)
0
/
2
0 (Ant
i
HPA3
b+a
nt
i
HLAA2
)
0
/
2
0 Ant
i
HLAB1
3
+B6
0
+B6
1
6
/
2
0
5
/
2
0
8
/
2
0
1
2
/
2
0
1
0
/
2
0
1
2
/
2
0
1
0
/
2
0
5
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0
0
/
2
0(-)(-)
0
/
2
0(-)(-)
0
/
2
0(+)(-)
0
/
2
0(-)(+)
0
/
2
0(-)(+)
0
/
2
0(-)(+)
0
/
2
0(+)(+)
0
/
2
0(+)(+)
6
/
2
0 0
/
2
0 0
/
2
0(+)(+) 0
/
2
0
1
0
/
2
0 0
/
2
0 0
/
2
0(+)(+) 1
0
/
2
0
1
0
/
2
0 0
/
2
0 0
/
2
0(+)(+) 0
/
2
0
Ant
i
HLAA3
1
+A3
3
Ant
i
HLAB7
+B4
8
+B6
0
Ant
i
HLAB5
1
+B5
2
Ant
i
HLACw3
Ant
i
HLAA2
6
+A3
1
+A3
3
Ant
i
HLAA2
+B6
0
Ant
i
HLAB1
3
+B6
0
+B6
1
Ant
i
HLAB4
8
+B6
0
+B6
1
Ant
i
HLAA2
6
+A3
3
Ant
i
HLAA2
Ant
i
HLAB1
3
+B6
0
+B6
1
†:MMPHA wi
t
hc
hl
o
r
o
qui
ne
unt
r
e
a
t
e
dpl
a
t
e
l
e
t
s
‡:MMPHA wi
t
hc
hl
o
r
o
qui
ne
t
r
e
a
t
e
dpl
a
t
e
l
e
t
s
*:Nu
mbe
ro
fpo
s
i
t
i
vepa
ne
l
s
/
Numbe
ro
ft
e
s
t
e
dpa
ne
l
s
.Yk1E!xX?d2[bgZFie26l|
A6 ?,*;!IgG-M-MPHA w= AHG-LCT w.
&
'
1!IgM-HLA %*"$)(+#,
=B?Qn!IgM-M-MPHA w.znFh26 3
IgM-HLA ]p@YkfqRr?:*; Miller
|@ PCs xX<A!*3EB CCI24hours . 0 Fh2
CA!GHJK$MFy*6]IOLNPgZ?
xX\S.tCE>-96.!QnFh26 3 |
,*; 4( .cq<)96=v`2;*D.1&!
@ PCs x X < A CCI24hours . 4 E 5 E!22.7!
aU!T#.y*6 IgM-M-MPHA w<A!uVF
L&Fh2xX\SFtCE6
19.6!27.8%'109!
^96 3 j{@Rr@+8!37( ?,*;cBY
%Table 7&
"
kWr._-96"2-2!Ys?y*6 IgMHLA ]p. HLA-A2 ]p 1 j{7/<)D0=
-C!1C?om@ IgM-HLA ]pFy*6Ys
eklQNKZ[
`52O ` 3 V
409
Ta
bl
e5 Spe
c
i
f
i
c
i
t
i
e
so
fI
gM-a
ndI
gGHLA a
nt
i
bo
di
e
spo
s
i
t
i
veo
nI
gM-a
ndI
gGMMPHA
Pa
t
i
e
ntBl
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410
Japanese Journal of Transfusion Medicine, Vol. 52. No. 3
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1'Miller K, Kickler TS, Ness PM, et al#Immunoglobulin class heterogeneity of platelet antibodies. Vox Sang, 47#421%426, 1984.
2'Godeau B, Fromont P, Seror T, et al#Platelet alloimmunization after multiple transfusions # a
prospective study of 50 patients. Br J Haematol,
81#395%400, 1992.
3'Laundy GJ, Bradley BA, Rees BM, et al#Incidence and specificity of HLA antibodies in multitransfused patients with acquired aplastic anemia. Transfusion, 44#814%825, 2004.
4'Iwaki Y, Lau M, Terasaki PI#Successful trans-
412
plants across T warm-positive cross-matches due
to IgM antibodies. Clin Transplant, 2$81% 84,
1988.
5'International forum$Detection of platelet-reactive
antibodies in patients who are refractory to
platelet transfusions, and the selection of compatible donors. Vox Sang, 84$73%88, 2003.
6'rMQ!~K u!lA\B‡!m$anti-PLT#
9@=9#MPHA .O[.*0( IgM <8 >
HLA Po156N^t‚NyDa†&`ˆ'
"s
€‚NGEV!50$296, 2004.
7'Terasaki PI, McClelland JB$Microdroplet assay
of human serum cytotoxins. Nature, 204$998%
1000, 1964.
8'Ohgama J, Yabe R, Tamai T, et al$A new solidphase assay system using magnetic force on
blood group serology. Transfusion Medicine, 6$
351%359, 1996.
9'cp_X!Ab d!ipJT!m$Yf…T7
Sƒ,-ek0N^tPoO[2U4"NCW
L!25$33%40, 2002.
10'Tamai T, Ishii Y, Mazda T$IgM alloantibody detection by M-MPHA , a new solid-phase assay
system. Transfusion Science, 23$47%54, 2000.
11'Pei R, Wang G, Tarsitani C, et al$Simultaneous
Japanese Journal of Transfusion Medicine, Vol. 52. No. 3
HLA class I and class II antibodies screening
with flow cytometry. Hum Immunol, 59$313%
322, 1998.
12'Johnson AH, Rossen RD, Butler WB$Detection
of alloantibodies using a sensitive antiglobulin microcytotoxicity test. Tissue Antigens, 2$215%
226, 1972.
13'hr x!npg{!]Rjw!m$P HLA :?
; I Po2|}zO[Iq/N^t‚NHZ1
)+6|}zPoO[„%AHG-LCT!LIFT!
PIFT!M-MPHA )53 FlowPRA 2vF"s‚
NEV!50&6'
$753%760, 2004.
14'Novotny VMJ$Prevention and management of
platelet transfusion refractoriness . Vox Sang ,
76$1%13, 1999.
15'Bishop JF, Matthews JP, McGrath K, et al$Factors influencing 20-hour increments after platelet
transfusion. Transfusion, 31$392%396, 1991.
16'McCalmon RT Jr, Tardif GN, Sheehan MA , et
al$IgM antibodies in renal transplantation. Clin
Transplant, 11$558%564, 1997.
17'Katz SM, Kimball PM, Ozaki C, et al$Positive
pretransplant crossmatches predict early graft
loss in liver allograft recipients. Transplantation,
57$616%620, 1994.
345.,+01
252- 2 3 /
413
PLATELET TRANSFUSION REFRACTORINESS ASSOCIATED
WITH IGM-HLA-CLASS I ANTIBODIES
$IMMUNOGLOBULIN CLASS HETEROGENEITY OF HLA CLASS I
ANTIBODIES IN PTR PATIENTS
Satoshi Saito1'3', Toyohiro Tamai2', Masao Ota3', Satoshi Ota1', Masayoshi Komatsu1',
Morito Hirabayashi1', Keiko Tamaki1', Hideyuki Seshimo1', Hisashi Shimizu1',
Hideki Asamura3', Hirofumi Fukushima3'and Setsuo Nomura1'
1'
Japanese Red Cross Nagano Blood Center
Diagnostic Systems Department, Olympus Corporation
3'
Department of Legal Medicine, Shinshu University School of Medicine
2'
Although HLA-class I antibodies&Abs'are considered one of the major obstacles in posttransfusion platelet increments for platelet transfusion refractory&PTR'patients, whether IgM-HLA-class
I Abs are associated with accelerated platelet destruction and transfusion failure remains unclear. Accordingly, we assessed the frequency of IgM-HLA-class I Abs development in 121 PTR patients using
the magnetic-mixed passive hemagglutination assay&M-MPHA'
, flow cytometric reagents for detection of panel-reactive antibody against HLA Class I antigens&FlowPRA'and the anti-human immunoglobulin lymphocyte cytotoxity test&AHG-LCT'. The relationship between IgM-HLA-class I Abs
and PTR was assessed by calculating 24 h post-transfusion corrected platelet count increments
. Result showed that IgM-HLA-class I Abs were detected in 48 of 121 patients using the M&CCI24hours'
MPHA. Only 20 and 35 of these 48 IgM-HLA-class I Abs were detected using the AHG-LCT and
FlowPRA respectively. In 7 of 48 patients positive for IgM-HLA-class I Abs, 74 transfusions without
L'
"In
corresponding antigen for specificities of IgM-HLA-class I Abs had CCI24hours of 19.7(4.7&)109!
contrast, 38 transfusions with corresponding antigens for specificities of the same Abs had CCI24hours of
2.0(1.9&)109 !L'. Collectively, IgM-HLA-class I Abs were detected in 39.7* of PTR patients, and
were considered to play a role in mediating refractoriness to platelet transfusions. In 28 of 48 cases,
IgM-HLA-class I Abs could not be detected by the AHG-LCT. Detection of IgM-HLA-class I Abs using the M-MPHA may clarify the as yet unknown mechanism of the pathogenesis of PTR.
Key words# IgM-HLA-class I antibodies, IgG-HLA-class I antibodies, Platelet transfusion refractoriness&PTR', Magnetic%mixed passive hemagglutination assay&M-MPHA'!Flow Cytometric Reagents for Detection of Panel-reactive antibody against HLA Class I antigens
&FlowPRA'
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