apparently RHD*01N.01 (RHD deletion) with unexpected serology
(ISBT table: not listed)
This entry is partly characterized.
apparently deleted RHD with unexpected serology,
Molecular data
Nucleotides:
Amino acids:
Hybrid allele encompassing at least one RHCE exon:
NA
Comments on the molecular basis:
- "No RHD gene could be determined in 13 patient samples"
- RHCE was not fully sequenced but the authors consider, from their unpublished testing, that it is unlikely that RHCE variants explained RH1 expression in these samples
- QMPSF and sequencing of the 10 RHD exons
- no signal for all exons by Beadchip
Extracellular position of one or more amino acid substitutions:
Splicing:
Unconventional prediction methods:
Phenotype
Main D phenotype: unexpected D positive of weak D phenotype in the absence of RHD gene (last update: Jan. 8, 2021)Reports by D phenotype
- Undetailed ambiguous D phenotype
- False positive
- Weak D phenotype
- False positive
- DEL
- False positive
Other RH phenotypes: RH:
Serology with monoclonal anti-D
Antigen Density (Ag/RBC)
More phenotype data
Rhesus Similarity Index
Haplotype
Main CcEe phenotype association: NA (last update: Dec. 28, 2020)Alloimmunization
Antibodies in carriers
Antibody specificity: D (RH1)
Summary: not relevant (last update: Dec. 28, 2020)Detailed information
Antibodies in D negative recipients
Alloimmunization in recipients: NA
Reports
Summary: many descriptions, described in all populations (last update: Dec. 28, 2020)Detailed reports
- 6/191 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
- 1/15446 first time donors with D negative phenotype, tested for D phenotype in immediate spin and IAT testing in the Canadian population, mainly White, Ontario
- 3/58 within a donor population of 38836, 4272 initially typed D negative and 58 of these were found to be weak D with different reagents Albanian
- 26/223 donors with D negative phenotype initially, found to have D antigen expression (67 of the 223 samples of the cohort) or samples referred with discrepant or weak D typing, or discrepancies with previous typings, or anti-D in D positive individuals (156 of the 223 samples of the cohort) in the Indian population
- 3/129 donors with weak D phenotype Thai
- 11/121 donors with DEL phenotype Thai
- 9/353 samples referred for discrepant or weak D typing in the USA population
Allele or phenotype frequency
Structure mapping
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References
- Polin H et al. Effective molecular RHD typing strategy for blood donations. Transfusion, 2007. [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]
- Goldman M et al. Identifying D-positive donors using a second automated testing platform. Immunohematology, 2013. [Citation] [RHeference]
- Xhetani M et al. Distribution of Rhesus blood group antigens and weak D alleles in the population of Albania. Blood Transfus, 2014. [Citation] [RHeference]
- S Vege et al. RHD Genotyping of Discrepant or Weak D Samples: Over a Year’s Experience. Transfusion, 2017. — Abstract — [RHeference]
- Fichou Y et al. Molecular basis of weak D expression in the Indian population and report of a novel, predominant variant RHD allele. Transfusion, 2018. [Citation] [RHeference]
- Dezan MR et al. High frequency of variant RHD genotypes among donors and patients of mixed origin with serologic weak-D phenotype. J Clin Lab Anal, 2018. [Citation] [RHeference]
- Thongbut J et al. Comprehensive Molecular Analysis of Serologically D-Negative and Weak/Partial D Phenotype in Thai Blood Donors. Transfus Med Hemother, 2020. [Citation] [RHeference]
- Vege S et al. Impact of RHD genotyping on transfusion practice in Denmark and the United States and identification of novel RHD alleles. Transfusion, 2021. [Citation] [RHeference]
Last update: Jan. 8, 2021