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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency (Family B)

ABSTRACT: Affymetrix 6.0 SNP data for haplotype comparison of patients from two different families sharing the same homozygous mutation in TFRC, to determine if the families were related to each other Peripheral blood was used for patients who had no history of hematopoietic stem cell transplant (HSCT). Fibroblasts cell lines were used as a source of DNA for the individual who received HSCT.

ORGANISM(S): Homo sapiens

PROVIDER: GSE75349 | GEO | 2015/11/25

SECONDARY ACCESSION(S): PRJNA304000

REPOSITORIES: GEO

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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency (Family B)

Project description:Affymetrix 6.0 SNP data for haplotype comparison of patients from two different families sharing the same homozygous mutation in TFRC, to determine if the families were related to each other Peripheral blood was used for patients who had no history of hematopoietic stem cell transplant (HSCT). Fibroblasts cell lines were used as a source of DNA for the individual who received HSCT. Genomic DNA from 3 subjects (2 from Family A, 1 from Family B in duplicate) was genotyped at 909,622 single nucleotide polymorphisms (SNPs) on the Genome-Wide Human SNP 6.0 Array (Affymetrix).

2015-11-25 | E-GEOD-75349 | biostudies-arrayexpress

A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency (Family A)

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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency (Family A)

Project description:Affymetrix 6.0 SNP data for genome-wide linkage scans of a consanguineous Kuwaiti family with a combined immunodeficiency Peripheral blood or saliva were used for patients who had no history of hematopoietic stem cell transplant (HSCT). Fibroblasts cell lines were used as a source of DNA for individuals who received HSCT. Genomic DNA from 32 subjects (5 affected and 27 unaffected) from Family A was genotyped at 909,622 single nucleotide polymorphisms (SNPs) on the Genome-Wide Human SNP 6.0 Array (Affymetrix).

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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency

Project description:This SuperSeries is composed of the SubSeries listed below.

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A missense mutation in TFRC, encoding transferrin receptor 1, causes combined immunodeficiency.

Project description:Patients with a combined immunodeficiency characterized by normal numbers but impaired function of T and B cells had a homozygous p.Tyr20His substitution in transferrin receptor 1 (TfR1), encoded by TFRC. The substitution disrupts the TfR1 internalization motif, resulting in defective receptor endocytosis and markedly increased TfR1 expression on the cell surface. Iron citrate rescued the lymphocyte defects, and expression of wild-type but not mutant TfR1 rescued impaired transferrin uptake in patient-derived fibroblasts. Tfrc(Y20H/Y20H) mice recapitulated the immunological defects of patients. Despite the critical role of TfR1 in erythrocyte development and function, patients had only mild anemia and only slightly increased TfR1 expression in erythroid precursors. We show that STEAP3, a metalloreductase expressed in erythroblasts, associates with TfR1 and partially rescues transferrin uptake in patient-derived fibroblasts, suggesting that STEAP3 may provide an accessory TfR1 endocytosis signal that spares patients from severe anemia. These findings demonstrate the importance of TfR1 in adaptive immunity.

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Effect of R22W mutation in TFRC gene on gene expression in PBMCs

Project description:TFRC, also known as CD71, regulates the uptake of transferrin-bound iron into cells through receptor-mediated endocytosis. In a patient with a combined immunodeficiency, we identified a homozygous missense mutation in TFRC gene leading to R22W amino acid change in the cytoplasmic tail of the receptor. This mutation impairs the endocytosis of TFRC, which results in profound aberrations in the immune system.

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