Blood Group System Flashcards
ISBT #007
The Lewis system (Le)
The only major system not produced by RBCs. Intrinsic to GIT
Lewis
Ags are on type 1 glycosphingolipids
Lewis
Gene at chromosome 19 and codes for Gucosyltransferase 3
Lewis
Le (a+ b+) possible in
Asians
lele / Le (a- b-) / (Le^null) possible in
Blacks
Associated with Helicobacter pylori
Le^b
ISBT #002; Chromosome 4
MNS system
• On glycophorin A
• amino acid #1 - serine
• amino acid # 5 - Glycine
M antigen
• On glycophorin A
• amino acid #1 - Leucine
• amino acid # 5 - Glutamic acid
N antigen
On glycophorin B
Amino acid #29 - Methionine
S antigen
On glycophorin B
Amino acid #29 - Threonine
s antigen
Reaction enhanced at pH 6.5 (acidic)
Seen in multiparous women
Anti-M
Reaction enhanced at alkaline pH
Seen in RENAL DIALYSIS patient where machine is sterilized with formaldehyde
Anti-N
ISBT # 003
P1PK
Antigen that deteriorates rapidly upon storage. False nega in old specimen
P1 antigen
Neutralized by hydatid cysts fluid from E. Granulosus
Anti-P1
Found in fascioliasis
Anti-P1
Biphasic hemolysin
Autoanti-P
_____ receptor for parvovirus19
_____ receptor for SHIGA TOXIN; cause HUS
_____ receptor for P-fambriated uropathogenic E. coli
P antigen
P^k antigen
P system antigens
_____ hydatid cysts and other parasitic infection
_____ spontaneous abortions in Early pregnancy
_____ PCH
Anti-P1
Anti-Tja
Autoanti-P
ISBT#027
I (individual) system
Associated with HEMPAS or Chronic Dyserythropoietic Anemia II
I system
HEMPAS
Hereditary Erythroblastic Multinuclearity with Positive Acidified Serum test
Most common agglutinin in patient with hemolytic anemia
Pathogenic Autoanti-I / Anti-I
Causes acrocyanosis
Anti-I / pathogenic Autoanti-I
Associated with congenital cataracts in Asians
Adult i
Associated with:
IM
EBV infxn
Alcoholic Cirrhosis
Anti-i
ISBT#006; gene at chromosome 7
Kell
First blood group to be discovered after antiglobulin testing
Kell
ISBT#009; Chromosome 18
KIDD System
Antigens of Kidd blood group
- Jk (a+b-)
- Jk (a+b+)
- Jk (a-b+)
- Jk (a-b-)
Antibodies of Kidd, Jk
- Anti-Jk^a
- Anti-Jk^b
- Anti-Jk3
Allen and colleagues (1951) reported finding antibody in the serum of Mrs. Kidd, whose infant (John Kidd) had HDFN
Notorious in blood bank;
Anti-Jk^a
Anti-Jk^b
Can cause **severe immediate and delayed fatal HTR ** and mild HDFN
Anti-Jk3
Antihypertensive drugs that is associated with Drug induced HTR
Aldomet and Methyldopa
ISBT #005; CHROMOSOME 19q
Lutheran System Lu
Jk(a+b-) seen in
Blacks
Jk(a-b+) and Jk (a+b+) seen in
Asians and Whites
Jk(a-b-) seen in
0.9% Polynesians
- Filipino
- Indonesians
- Japanese
- Chinese
Lutheran Antigens
- Lu^a
- Lu^b
- Lu3
Lutheran antibodies
- anti-Lu^a
- anti-ALu^b
- Anti-Lu^3
Found in patient with SLE, RT reacting IgM and is naturally occurring
Clinically insignificant
Anti-Lu^a
Associated with shortened survival of transfused cells and post transfusion jaundice(not severe)
Anti-Lu^b
ISBT #010; Chromosome 17q
Diego system, Di
Found in tissues like as brain, hepatocytes, lungs, pancreas, placenta, and skeletal muscle
Lu^a, Lu^b, and Lu3
Located on BAND-3 / ANION EXCHANGE-1(AE-1) or SLC4A1
Diego antigens
SLC4A1 - solute carrier family-4 anion exchanger, member 1
Defects in AE-1 CAUSES
Congenital Acanthocytosis
Hereditary Spherocytosis
Southeast Asian Ovalocytosis
Diego Antibodies
Anti-Di^a
Anti-Di^b
Anti-Wr^a
Anti-Wr^b