partly characterized RHD*09 (weak D type 4) (partly characterized or subtypes not separated)
(ISBT table: not listed)
This entry is partly characterized.
weak D type 4 - partly characterized or subtypes not separated,
Molecular data
Nucleotides:
Amino acids:
Hybrid allele encompassing at least one RHCE exon:
NA
Comments on the molecular basis:
- all samples are likely to be RHef00313 since these samples had 602G and 667G and 19/34 such samples in the study were fully sequenced and were RHef00313
- "nucleotide changes: 667T>G in RHD exon 5, 819G>A in RHD exon 6 because RHD exon 2 and 4 amplifications failed"
- "Three weak D type 4 (...) alleles were assigned on the basis of exon 5 sequence analysis alone"
- not RHef00602, since those were separated
- subtypes not separated
- subtypes not separated
- subtypes not separated
- subtypes not separated
- samples without c.1025T>C
- RHef00313 or RHef00315 not seperated
- RHef00313 or RHef00315 not seperated
- RHef00313 or RHef00315 not seperated
- RHef00313 or RHef00315 not seperated
- RHef00313 or RHef00315 or RHef00319 not seperated
- listed as weak D type 4; RHef00602 alleles listed seperately
Extracellular position of one or more amino acid substitutions:
Splicing:
Unconventional prediction methods:
Phenotype
Main D phenotype: weak D (last update: May 3, 2020)Reports by D phenotype
- D positive (apparently normal D or undetailed positive D)
- Sample heterozygous with RHef00477
- Undetailed ambiguous D phenotype
- Sample heterozygous with RHef00477
- Discrepant D phenotype (negative or positive depending on anti-D reagents and techniques)
- Sample heterozygous with RHef00477
- Weak D phenotype
- Sample heterozygous with RHef00477
- D negative
- Sample heterozygous with RHef00477
Other RH phenotypes: RH:
Serology with monoclonal anti-D
Antigen Density (Ag/RBC)
More phenotype data
Rhesus Similarity Index
Haplotype
Main CcEe phenotype association: ce (last update: Aug. 15, 2020)ce | Ce | cE | CE | |
---|---|---|---|---|
ce | 45 | 18 | 1 | 0 |
Ce | 0 | 1 | 0 | |
cE | 1 | 0 | ||
CE | 0 |
Reports by CcEe phenotype
- with ce 21 samples (7 homozygous samples)
- with cE 1 sample (haplotype given, not complete phenotype)
- with Ccee 18 samples
- with CcEe 1 sample
- with ccEe 1 sample
15 samples (haplotype given, not complete phenotype)
3 samples (haplotype given, not complete phenotype)
2 samples (haplotype given, not complete phenotype)
4 samples
Reports by allele association
Alloimmunization
Antibodies in carriers
Antibody specificity: D (RH1)
Summary: not relevant, see types or alleles (last update: Aug. 25, 2020)Detailed information
-
Denomme GA et al. Transfusion (2005)
- Ab specificity: D (RH1)
- Number (auto- or allo-): 0
- Number listed as allo-:
- Number listed as auto-:
- Number of carriers of the allele assessed:
- DAT:
- Autologuous control:
- Elution:
- Autoadsorption:
- Titer:
- Was anti-LW excluded?:
- Other antibodies detected:
- Cross matches (with Ab and RBCs from different partial types):
- Transfusion history:
- Pregnancy history:
- Anti-D Ig history:
- Context:
- Hemolytic consequences:
- Comment: lists exposures to standard D antigen and patient blood management for several carriers
-
Daniels G et al. Br J Haematol (2013)
(review; Table I)
- Ab specificity: D (RH1)
- Number (auto- or allo-):
- Number listed as allo-: no new case detailed (listed as allo-anti-D)
- Number listed as auto-: NA
- Number of carriers of the allele assessed: NA
- DAT: NA
- Autologuous control: NA
- Elution: NA
- Autoadsorption: NA
- Titer: NA
- Was anti-LW excluded?: NA
- Other antibodies detected: NA
- Cross matches (with Ab and RBCs from different partial types): NA
- Transfusion history: NA
- Pregnancy history:
- Anti-D Ig history: NA
- Context: NA
- Hemolytic consequences: NA
- Comment: list of D variants associated with alloanti-D formation
Antibodies in D negative recipients
Alloimmunization in recipients: expected to be possible, see phenotype data
Reports
Summary: frequent descriptions, mainly in individuals of African or North-African descent, or compatible with such descent (last update: May 3, 2020)Detailed reports
-
40/326 (1 homozygous or hemizygous) random donors South African Black (Johannesburg)
(some samples overlap with
16584437 ) - 4/146 (+1 heterozygous with RHef00301) donors with weak D phenotype White, in the Austrian (Tyrol) population
- 1/270 donors with weak D phenotype White, in the German (Northern Germany) population
- 6/55 55 discrepant or weak D phenotypes among 33864 multiethnic patients (of African, Asian, Indoasian and European extraction) in the Canadian (Toronto) population
- 12/289 289 samples with ambiguous D phenotype (333 consecutive samples with ambiguous D phenotype studied but 44 were hybrid alleles, excluded from the study) in the French (Western France) population
- 2/45 45 samples referred for D typing discrepancies in the USA population (Table 2)
- 2/191 (2 donors and 0 patients) among 191 samples with weak D expression or unclear D phenotype within 44,743 donors and 8,604 patients tested in the Austrian population, Upper Austria
- 2/101 donors with weak D phenotype Danish
- 89/205 weak D phenotype African descent in the French population
- 3/16 among 2007 unrelated donors, 16 had weak D phenotype in the Brazilian population (Sao Paulo, mainly racially mixed non-white skin color individuals)
- 47/430 (3 heterozygous) among samples with ambigous D phenotype in the French population (Table S1)
- 1/269 among 308 donors (269 D positive, 39 D negative phenotype) who underwent molecular analysis in the Tunisian population
- 8/50 50 weak D phenotypes among 1113 initially D negative samples (25 samples were not resolved by the genotyping performed) in the Egyptian population
-
1/2000 among 2000 random blood donors (223 typed D negative), genotyped by amplifying RHD exons through 7 and 9 in the Tunisian population
(study may overlap with
25369614 ) - 1/67 (heterozygous with RHef00442) among 405 random donor samples used to evaluate RHD zygosity tests (35 typed D negative, 303 typed D positive, 67 of the latter had discordant results with different methods and were sequenced) in the Tunisian population
-
15/2000 7 homozygous and 8 heterozygous samples; among 2000 random donors (1777 typed D positive), all samples were genotyped for 602G and 667G, but these samples were not fully sequenced to separate weak D type 4 subtypes in the Tunisian population
(study may overlap with
24014941 ) - 10/627 weak D typing (95% from patients, 5% from donors; 21,2% were identified as RHef00442 or RHef00446 by authors, "mostly (…) inconclusive serology consequent to recent transfusion") in the Belgian (Flanders) population
- 8/400 among random blood and bone marrow donors genotyped for RHD in the Brazilian population (Parana state, Southern Brazil)
- 13/94 donors with discreapancies in D typing Southeast Brazil
Allele or phenotype frequency
Structure mapping
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References
- Wagner FF et al. Molecular basis of weak D phenotypes. Blood, 1999. [Citation] [RHeference]
- Hemker MB et al. DAR, a new RhD variant involving exons 4, 5, and 7, often in linkage with ceAR, a new Rhce variant frequently found in African blacks. Blood, 1999. [Citation] [RHeference]
- Müller TH et al. PCR screening for common weak D types shows different distributions in three Central European populations. Transfusion, 2001. [Citation] [RHeference]
- Denomme GA et al. Partial D, weak D types, and novel RHD alleles among 33,864 multiethnic patients: implications for anti-D alloimmunization and prevention. Transfusion, 2005. [Citation] [RHeference]
- Araújo F et al. Weak D type 2 is the most prevalent weak D type in Portugal. Transfus Med, 2006. [Citation] [RHeference]
- Le Maréchal C et al. Identification of 12 novel RHD alleles in western France by denaturing high-performance liquid chromatography analysis. Transfusion, 2007. [Citation] [RHeference]
- Polin H et al. Effective molecular RHD typing strategy for blood donations. Transfusion, 2007. [Citation] [RHeference]
- Westhoff CM et al. Rh complexities: serology and DNA genotyping. Transfusion, 2007. [Citation] [RHeference]
- Christiansen M et al. Correlation between serology and genetics of weak D types in Denmark. Transfusion, 2008. [Citation] [RHeference]
- Noizat-Pirenne F et al. Relevance of RH variants in transfusion of sickle cell patients. Transfus Clin Biol, 2011. [Citation] [RHeference]
- Cruz BR et al. RHD alleles in Brazilian blood donors with weak D or D-negative phenotypes. Transfus Med, 2012. [Citation] [RHeference]
- Ouchari M et al. RHD alleles in the Tunisian population. Asian J Transfus Sci, 2013. [Citation] [RHeference]
- Fichou Y et al. Establishment of a medium-throughput approach for the genotyping of RHD variants and report of nine novel rare alleles. Transfusion, 2013. [Citation] [RHeference]
- Hussein E et al. Weak D types in the Egyptian population. Am J Clin Pathol, 2013. [Citation] [RHeference]
- Daniels G et al. Variants of RhD--current testing and clinical consequences. Br J Haematol, 2013. [Citation] [RHeference]
- Ouchari M et al. [System RH: screening of partials D with RHD/RHCE hybrid gene]. Transfus Clin Biol, 2013. [Citation] [RHeference]
- Kacem N et al. Paternal RHD zygosity determination in Tunisians: evaluation of three molecular tests. Blood Transfus, 2015. [Citation] [RHeference]
- Ouchari M et al. Weak D in the Tunisian population. Blood Transfus, 2015. [Citation] [RHeference]
- Van Sandt VS et al. RHD variants in Flanders, Belgium. Transfusion, 2015. [Citation] [RHeference]
- A C Gaspardi et al. RHD variants in blood donors from Southeast Brazil. Transfusion, 2015. — Abstract — [RHeference]
- Zacarias JM et al. Frequency of RHD variants in Brazilian blood donors from Parana State, Southern Brazil. Transfus Apher Sci, 2016. [Citation] [RHeference]
Last update: Aug. 15, 2020