Comprehensive investigation of the caveolin 2 gene: resequencing and association for kidney transplant outcomes

Caveolae are plasma membrane structures formed from a complex of the proteins caveolin-1 and caveolin-2. Caveolae interact with pro-inflammatory cytokines and are dysregulated in fibrotic disease. Although caveolae are present infrequently in healthy kidneys, they are abundant during kidney injury....

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Veröffentlicht in:PloS one 2013-05, Vol.8 (5), p.e63358-e63358
Hauptverfasser: McCaughan, Jennifer A, Duffy, Seamus, O'Hagan, Thomas, Courtney, Aisling E, Borrows, Richard, Conlon, Peter J, Maxwell, Alexander P, McKnight, Amy Jayne
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Duffy, Seamus
O'Hagan, Thomas
Courtney, Aisling E
Borrows, Richard
Conlon, Peter J
Maxwell, Alexander P
McKnight, Amy Jayne
description Caveolae are plasma membrane structures formed from a complex of the proteins caveolin-1 and caveolin-2. Caveolae interact with pro-inflammatory cytokines and are dysregulated in fibrotic disease. Although caveolae are present infrequently in healthy kidneys, they are abundant during kidney injury. An association has been identified between a CAV1 gene variant and long term kidney transplant survival. Chronic, gradual decline in transplant function is a persistent problem in kidney transplantation. The aetiology of this is diverse but fibrosis within the transplanted organ is the common end point. This study is the first to investigate the association of CAV2 gene variants with kidney transplant outcomes. Genomic DNA from donors and recipients of 575 kidney transplants performed in Belfast was investigated for common variation in CAV2 using a tag SNP approach. The CAV2 SNP rs13221869 was nominally significant for kidney transplant failure. Validation was sought in an independent group of kidney transplant donors and recipients from Dublin, Ireland using a second genotyping technology. Due to the unexpected absence of rs13221869 from this cohort, the CAV2 gene was resequenced. One novel SNP and a novel insertion/deletion in CAV2 were identified; rs13221869 is located in a repetitive region and was not a true variant in resequenced populations. CAV2 is a plausible candidate gene for association with kidney transplant outcomes given its proximity to CAV1 and its role in attenuating fibrosis. This study does not support an association between CAV2 variation and kidney transplant survival. Further analysis of CAV2 should be undertaken with an awareness of the sequence complexities and genetic variants highlighted by this study.
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Caveolae interact with pro-inflammatory cytokines and are dysregulated in fibrotic disease. Although caveolae are present infrequently in healthy kidneys, they are abundant during kidney injury. An association has been identified between a CAV1 gene variant and long term kidney transplant survival. Chronic, gradual decline in transplant function is a persistent problem in kidney transplantation. The aetiology of this is diverse but fibrosis within the transplanted organ is the common end point. This study is the first to investigate the association of CAV2 gene variants with kidney transplant outcomes. Genomic DNA from donors and recipients of 575 kidney transplants performed in Belfast was investigated for common variation in CAV2 using a tag SNP approach. The CAV2 SNP rs13221869 was nominally significant for kidney transplant failure. Validation was sought in an independent group of kidney transplant donors and recipients from Dublin, Ireland using a second genotyping technology. Due to the unexpected absence of rs13221869 from this cohort, the CAV2 gene was resequenced. One novel SNP and a novel insertion/deletion in CAV2 were identified; rs13221869 is located in a repetitive region and was not a true variant in resequenced populations. CAV2 is a plausible candidate gene for association with kidney transplant outcomes given its proximity to CAV1 and its role in attenuating fibrosis. This study does not support an association between CAV2 variation and kidney transplant survival. 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Caveolae interact with pro-inflammatory cytokines and are dysregulated in fibrotic disease. Although caveolae are present infrequently in healthy kidneys, they are abundant during kidney injury. An association has been identified between a CAV1 gene variant and long term kidney transplant survival. Chronic, gradual decline in transplant function is a persistent problem in kidney transplantation. The aetiology of this is diverse but fibrosis within the transplanted organ is the common end point. This study is the first to investigate the association of CAV2 gene variants with kidney transplant outcomes. Genomic DNA from donors and recipients of 575 kidney transplants performed in Belfast was investigated for common variation in CAV2 using a tag SNP approach. The CAV2 SNP rs13221869 was nominally significant for kidney transplant failure. Validation was sought in an independent group of kidney transplant donors and recipients from Dublin, Ireland using a second genotyping technology. Due to the unexpected absence of rs13221869 from this cohort, the CAV2 gene was resequenced. One novel SNP and a novel insertion/deletion in CAV2 were identified; rs13221869 is located in a repetitive region and was not a true variant in resequenced populations. CAV2 is a plausible candidate gene for association with kidney transplant outcomes given its proximity to CAV1 and its role in attenuating fibrosis. This study does not support an association between CAV2 variation and kidney transplant survival. Further analysis of CAV2 should be undertaken with an awareness of the sequence complexities and genetic variants highlighted by this study.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23667606</pmid><doi>10.1371/journal.pone.0063358</doi><tpages>e63358</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Analysis
Biology
Caveolae
Caveolin
Caveolin 2 - genetics
Caveolin-1
Consent
Cytokines
Deoxyribonucleic acid
Diabetes
DNA
Donors
Ethics
Female
Fibroblasts
Fibrosis
Gene deletion
Genes
Genetic diversity
Genetic testing
Genetic variance
Genomes
Genotyping
Genotyping Techniques
Glaucoma
Graft Survival - genetics
Haplotypes - genetics
Hospitals
Humans
Immunology
Inflammation
Insertion
Investigations
Ireland
Kaplan-Meier Estimate
Kidney diseases
Kidney Transplantation
Kidney transplants
Kidneys
Linkage Disequilibrium - genetics
Male
Medical prognosis
Medical research
Medicine
Membrane structures
Nephrology
Polymorphism, Single Nucleotide - genetics
Proportional Hazards Models
Proteins
Renal failure
Reproducibility of Results
Sequence Analysis, DNA
Signal transduction
Single nucleotide polymorphisms
Single-nucleotide polymorphism
Studies
Survival
Transplantation
Transplants
Transplants & implants
Treatment Outcome
Type 2 diabetes
title Comprehensive investigation of the caveolin 2 gene: resequencing and association for kidney transplant outcomes
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