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  1. Article ; Online: Acetyl-coenzyme A carboxylase beta gene polymorphism does not predict cardiovascular risk susceptibility in Chinese type 2 diabetic individuals.

    Chan, Gary C W / Zhi, Helen / Hicks, Pamela J / Freedman, Barry I / Tang, Sydney C W

    Nephrology (Carlton, Vic.)

    2022  Volume 27, Issue 5, Page(s) 404–409

    Abstract: Aim: Type 2 diabetes (T2D) is associated with significant cardiovascular (CV) morbidity and mortality. A single-nucleotide polymorphism (SNP) in the acetyl-coenzyme A carboxylase beta (ACACB) gene, rs2268388, reproducibly associates with diabetic ... ...

    Abstract Aim: Type 2 diabetes (T2D) is associated with significant cardiovascular (CV) morbidity and mortality. A single-nucleotide polymorphism (SNP) in the acetyl-coenzyme A carboxylase beta (ACACB) gene, rs2268388, reproducibly associates with diabetic nephropathy (DN). ACACB regulates fatty-acid oxidation. As such, we assessed whether ACACB SNP rs2268388 was associated with CV disease in Chinese individuals with T2D.
    Methods: Chinese individuals with T2D were genotyped for SNP rs2268388. Baseline demographics were recorded and clinical data regarding coronary, carotid, and peripheral arterial disease and congestive heart failure were retrieved from electronic patient records. Statistical analyses were performed to detect associations between the rs2268388 T risk allele with CV outcomes in the cohort.
    Results: A total of 596 Chinese individuals with T2D were genotyped. Their mean age was 66.8 ± 10.9 years at the time of data extraction. Genotyping revealed 59.7%, 33.2% and 7.1% of the study population were non-carriers, heterozygous and homozygous carriers of the rs2268388 T risk allele in ACACB. No statistically significant correlations of the risk allele were observed with CV outcomes.
    Conclusion: These results did not demonstrate association between rs2268388 SNP in ACACB with CV outcomes in Chinese T2D patients. The ACACB gene and its role in CV risk susceptibility, via alterations in fatty acid oxidation, remains an interesting postulate and studies with larger cohort sizes and in different ethnic groups remain warranted.
    MeSH term(s) Acetyl-CoA Carboxylase/genetics ; Acetyl-CoA Carboxylase/metabolism ; Aged ; Cardiovascular Diseases/genetics ; Cardiovascular Diseases/metabolism ; Case-Control Studies ; China/epidemiology ; Coenzyme A/genetics ; Coenzyme A/metabolism ; Diabetes Mellitus, Type 2/diagnosis ; Diabetes Mellitus, Type 2/genetics ; Diabetes Mellitus, Type 2/metabolism ; Diabetic Nephropathies/diagnosis ; Diabetic Nephropathies/genetics ; Diabetic Nephropathies/metabolism ; Genetic Predisposition to Disease ; Humans ; Middle Aged ; Polymorphism, Single Nucleotide ; Risk Factors
    Chemical Substances ACACB protein, human (EC 6.4.1.2) ; Acetyl-CoA Carboxylase (EC 6.4.1.2) ; Coenzyme A (SAA04E81UX)
    Language English
    Publishing date 2022-01-05
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 1303661-0
    ISSN 1440-1797 ; 1320-5358
    ISSN (online) 1440-1797
    ISSN 1320-5358
    DOI 10.1111/nep.14017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Urine APOL1 Isoforms Reflect Plasma-Derived Liver-Synthesized Proteins.

    Althage, Magnus / Heinrich, Timothy M / Miliotis, Tasso / Bogstedt, Anna / Ma, Lijun / Gautreaux, Michael D / Hicks, Pamela J / Palmer, Nicholette D / MacPhee, Iain / Hartleib-Geschwindner, Judith / Greasley, Peter J / Freedman, Barry I

    Journal of the American Society of Nephrology : JASN

    2021  Volume 32, Issue 10, Page(s) 2442–2444

    MeSH term(s) Adult ; Aged ; Apolipoprotein L1/blood ; Apolipoprotein L1/genetics ; Apolipoprotein L1/urine ; Female ; Genetic Variation ; Genotype ; Humans ; Kidney/metabolism ; Kidney Transplantation ; Male ; Middle Aged ; Postoperative Period ; Protein Isoforms/blood ; Protein Isoforms/genetics ; Protein Isoforms/urine
    Chemical Substances APOL1 protein, human ; Apolipoprotein L1 ; Protein Isoforms
    Language English
    Publishing date 2021-06-23
    Publishing country United States
    Document type Letter ; Research Support, Non-U.S. Gov't
    ZDB-ID 1085942-1
    ISSN 1533-3450 ; 1046-6673
    ISSN (online) 1533-3450
    ISSN 1046-6673
    DOI 10.1681/ASN.2021030411
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  3. Article ; Online: Nephropathy Progression in African Americans With a Family History of ESKD: Implications for Clinical Trials in APOL1-Associated Nephropathy.

    Freedman, Barry I / Spainhour, Mitzie / Hicks, Pamela J / Turner, Jolyn / Robertson, Julia / Langefeld, Carl D / Murea, Mariana / Divers, Jasmin

    American journal of kidney diseases : the official journal of the National Kidney Foundation

    2019  Volume 74, Issue 2, Page(s) 284–286

    MeSH term(s) Adult ; African Americans/genetics ; Apolipoprotein L1/genetics ; Clinical Trials as Topic ; Disease Progression ; Female ; Genotype ; Humans ; Kidney Diseases/complications ; Kidney Diseases/genetics ; Kidney Failure, Chronic/genetics ; Male ; Middle Aged
    Chemical Substances APOL1 protein, human ; Apolipoprotein L1
    Language English
    Publishing date 2019-05-07
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Extramural
    ZDB-ID 604539-x
    ISSN 1523-6838 ; 0272-6386
    ISSN (online) 1523-6838
    ISSN 0272-6386
    DOI 10.1053/j.ajkd.2019.03.414
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Genome-wide association study for time to failure of kidney transplants from African American deceased donors.

    Divers, Jasmin / Ma, Lijun / Brown, William Mark / Palmer, Nicholette D / Choi, Young / Israni, Ajay K / Pastan, Stephen O / Julian, Bruce A / Gaston, Robert S / Hicks, Pamela J / Reeves-Daniel, Amber M / Freedman, Barry I

    Clinical transplantation

    2020  Volume 34, Issue 6, Page(s) e13827

    Abstract: Two renal-risk variants in the apolipoprotein L1 gene (APOL1) in African American (AA) deceased donors (DD) are associated with shorter renal allograft survival after transplantation. To identify additional genes contributing to allograft survival, a ... ...

    Abstract Two renal-risk variants in the apolipoprotein L1 gene (APOL1) in African American (AA) deceased donors (DD) are associated with shorter renal allograft survival after transplantation. To identify additional genes contributing to allograft survival, a genome-wide association study was performed in 532 AA DDs. Phenotypic data were obtained from the Scientific Registry of Transplant Recipients. Association and single-nucleotide polymorphism (SNP)-by-APOL1 interaction tests were conducted using death-censored renal allograft survival accounting for relevant covariates. Replication and inverse-variance-weighted meta-analysis were performed using data from 250 AA DD in the Genomics of Transplantation study. Accounting for APOL1, multiple SNPs near the Nudix Hydrolase 7 gene (NUDT7) showed strong independent effects (P = 1.6 × 10
    MeSH term(s) African Americans/genetics ; Apolipoprotein L1/genetics ; Genome-Wide Association Study ; Graft Rejection/genetics ; Humans ; Kidney Transplantation ; Lipoproteins, HDL/genetics
    Chemical Substances APOL1 protein, human ; Apolipoprotein L1 ; Lipoproteins, HDL
    Language English
    Publishing date 2020-04-25
    Publishing country Denmark
    Document type Journal Article ; Meta-Analysis ; Research Support, N.I.H., Extramural
    ZDB-ID 639001-8
    ISSN 1399-0012 ; 0902-0063
    ISSN (online) 1399-0012
    ISSN 0902-0063
    DOI 10.1111/ctr.13827
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  5. Article ; Online: JC Viruria Is Associated With Reduced Risk of Diabetic Kidney Disease.

    Kruzel-Davila, Etty / Divers, Jasmin / Russell, Gregory B / Kra-Oz, Zipi / Cohen, Moran Szwarcwort / Langefeld, Carl D / Ma, Lijun / Lyles, Douglas S / Hicks, Pamela J / Skorecki, Karl L / Freedman, Barry I

    The Journal of clinical endocrinology and metabolism

    2019  Volume 104, Issue 6, Page(s) 2286–2294

    Abstract: Purpose: African Americans who shed JC polyomavirus (JCV) in their urine have reduced rates of nondiabetic chronic kidney disease (CKD). We assessed the associations between urinary JCV and urine BK polyomavirus (BKV) with CKD in African Americans with ... ...

    Abstract Purpose: African Americans who shed JC polyomavirus (JCV) in their urine have reduced rates of nondiabetic chronic kidney disease (CKD). We assessed the associations between urinary JCV and urine BK polyomavirus (BKV) with CKD in African Americans with diabetes mellitus.
    Methods: African Americans with diabetic kidney disease (DKD) and controls lacking nephropathy from the Family Investigation of Nephropathy and Diabetes Consortium (FIND) and African American-Diabetes Heart Study (AA-DHS) had urine tested for JCV and BKV using quantitative PCR. Of the 335 individuals tested, 148 had DKD and 187 were controls.
    Results: JCV viruria was detected more often in the controls than in the patients with DKD (FIND: 46.6% vs 32.2%; OR, 0.52; 95% CI, 0.29 to 0.93; P = 0.03; AA-DHS: 30.4% vs 26.2%; OR, 0.63; 95% CI, 0.27 to 1.48; P = 0.29). A joint analysis adjusted for age, sex, and study revealed that JC viruria was inversely associated with DKD (OR, 0.56; 95% CI, 0.35 to 0.91; P = 0.02). Statistically significant relationships between BKV and DKD were not observed.
    Main conclusions: The results from the present study extend the inverse association between urine JCV and nondiabetic nephropathy in African Americans to DKD. These results imply that common pathways likely involving the innate immune system mediate coincident chronic kidney injury and restriction of JCV replication. Future studies are needed to explore causative pathways and characterize whether the absence of JC viruria can serve as a biomarker for DKD in the African American population.
    MeSH term(s) African Americans ; Aged ; BK Virus/isolation & purification ; Coinfection/virology ; Diabetic Nephropathies/prevention & control ; Diabetic Nephropathies/virology ; Female ; Humans ; JC Virus/isolation & purification ; Male ; Middle Aged ; Urinary Tract Infections/virology ; Urine/virology
    Language English
    Publishing date 2019-01-29
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, N.I.H., Intramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 3029-6
    ISSN 1945-7197 ; 0021-972X
    ISSN (online) 1945-7197
    ISSN 0021-972X
    DOI 10.1210/jc.2018-02482
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  6. Article ; Online: Genome-wide association study of vitamin D concentrations and bone mineral density in the African American-Diabetes Heart Study.

    Palmer, Nicholette D / Lu, Lingyi / Register, Thomas C / Lenchik, Leon / Carr, J Jeffrey / Hicks, Pamela J / Smith, S Carrie / Xu, Jianzhao / Dimitrov, Latchezar / Keaton, Jacob / Guan, Meijian / Ng, Maggie C Y / Chen, Yii-der I / Hanley, Anthony J / Engelman, Corinne D / Norris, Jill M / Langefeld, Carl D / Wagenknecht, Lynne E / Bowden, Donald W /
    Freedman, Barry I / Divers, Jasmin

    PloS one

    2021  Volume 16, Issue 5, Page(s) e0251423

    Abstract: Relative to European Americans, African Americans have lower 25-hydroxyvitamin D (25OHD) and vitamin D binding protein (VDBP) concentrations, higher 1,25-dihydroxyvitamin D (1,25(OH)2D3) concentrations and bone mineral density (BMD), and paradoxically ... ...

    Abstract Relative to European Americans, African Americans have lower 25-hydroxyvitamin D (25OHD) and vitamin D binding protein (VDBP) concentrations, higher 1,25-dihydroxyvitamin D (1,25(OH)2D3) concentrations and bone mineral density (BMD), and paradoxically reduced burdens of calcified atherosclerotic plaque (subclinical atherosclerosis). To identify genetic factors contributing to vitamin D and BMD measures, association analysis of >14M variants was conducted in a maximum of 697 African American-Diabetes Heart Study participants with type 2 diabetes (T2D). The most significant association signals were detected for VDBP on chromosome 4; variants rs7041 (β = 0.44, SE = 0.019, P = 9.4x10-86) and rs4588 (β = 0.17, SE = 0.021, P = 3.5x10-08) in the group-specific component (vitamin D binding protein) gene (GC). These variants were found to be independently associated. In addition, rs7041 was also associated with bioavailable vitamin D (BAVD; β = 0.16, SE = 0.02, P = 3.3x10-19). Six rare variants were significantly associated with 25OHD, including a non-synonymous variant in HSPG2 (rs116788687; β = -1.07, SE = 0.17, P = 2.2x10-10) and an intronic variant in TNIK (rs143555701; β = -1.01, SE = 0.18, P = 9.0x10-10), both biologically related to bone development. Variants associated with 25OHD failed to replicate in African Americans from the Insulin Resistance Atherosclerosis Family Study (IRASFS). Evaluation of vitamin D metabolism and bone mineral density phenotypes in an African American population enriched for T2D could provide insight into ethnic specific differences in vitamin D metabolism and bone mineral density.
    MeSH term(s) African Americans/genetics ; Aged ; Bone Density ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/genetics ; Diabetes Mellitus, Type 2/physiopathology ; Female ; Genome-Wide Association Study ; Humans ; Male ; Middle Aged ; Polymorphism, Genetic ; Vitamin D/analogs & derivatives ; Vitamin D/blood ; Vitamin D/genetics ; Vitamin D-Binding Protein/blood ; Vitamin D-Binding Protein/genetics
    Chemical Substances Vitamin D-Binding Protein ; Vitamin D (1406-16-2) ; 1,25-dihydroxyvitamin D (66772-14-3) ; 25-hydroxyvitamin D (A288AR3C9H)
    Language English
    Publishing date 2021-05-20
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0251423
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  7. Article ; Online: An Exome-wide Association Study for Type 2 Diabetes-Attributed End-Stage Kidney Disease in African Americans.

    Guan, Meijian / Keaton, Jacob M / Dimitrov, Latchezar / Hicks, Pamela J / Xu, Jianzhao / Palmer, Nicholette D / Wilson, James G / Freedman, Barry I / Bowden, Donald W / Ng, Maggie C Y

    Kidney international reports

    2018  Volume 3, Issue 4, Page(s) 867–878

    Abstract: Introduction: Compared with European Americans, African Americans (AAs) are at higher risk for developing end-stage kidney disease (ESKD). Genome-wide association studies (GWAS) have identified >70 genetic variants associated with kidney function and ... ...

    Abstract Introduction: Compared with European Americans, African Americans (AAs) are at higher risk for developing end-stage kidney disease (ESKD). Genome-wide association studies (GWAS) have identified >70 genetic variants associated with kidney function and chronic kidney disease (CKD) in patients with and without diabetes. However, these variants explain a small proportion of disease liability. This study examined the contribution of coding genetic variants for risk of type 2 diabetes (T2D)-attributed ESKD and advanced CKD in AAs.
    Methods: Exome sequencing was performed in 456 AA T2D-ESKD cases, and 936 AA nondiabetic, non-nephropathy control individuals at the discovery stage. A mixed logistic regression model was used for association analysis. Nominal associations (
    Results: A total of 11 suggestive T2D-ESKD associations (
    Conclusion: Our findings suggest that coding genetic variants are implicated in predisposition to T2D-ESKD in AAs.
    Language English
    Publishing date 2018-03-14
    Publishing country United States
    Document type Journal Article
    ISSN 2468-0249
    ISSN (online) 2468-0249
    DOI 10.1016/j.ekir.2018.03.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Analysis of a cardiovascular disease genetic risk score in the Diabetes Heart Study.

    Raffield, Laura M / Cox, Amanda J / Carr, J Jeffrey / Freedman, Barry I / Hicks, Pamela J / Langefeld, Carl D / Hsu, Fang-Chi / Bowden, Donald W

    Acta diabetologica

    2015  Volume 52, Issue 4, Page(s) 743–751

    Abstract: Aims: It remains unclear whether the high cardiovascular disease (CVD) burden in people with type 2 diabetes (T2D) is associated with genetic variants that contribute to CVD in general populations. Recent studies have examined genetic risk scores of ... ...

    Abstract Aims: It remains unclear whether the high cardiovascular disease (CVD) burden in people with type 2 diabetes (T2D) is associated with genetic variants that contribute to CVD in general populations. Recent studies have examined genetic risk scores of single-nucleotide polymorphisms (SNPs) identified by genome-wide association studies for their cumulative contribution to CVD-related traits. Most analyses combined SNPs associated with a single phenotypic class, e.g., lipids. In the present analysis, we examined a more comprehensive risk score comprised of SNPs associated with a broad range of CVD risk phenotypes.
    Methods: The composite risk score was analyzed for potential associations with subclinical CVD, self-reported CVD events, and mortality in 983 T2D-affected individuals of European descent from 466 Diabetes Heart Study (DHS) families. Genetic association was examined using marginal models with generalized estimating equations for subclinical CVD and prior CVD events and Cox proportional hazards models with sandwich-based variance estimation for mortality; analyses were adjusted for age and sex.
    Results: An increase in genetic risk score was significantly associated with higher levels of coronary artery calcified plaque (p = 1.23 × 10(-4)); however, no significant associations with self-reported myocardial infarction and CVD events and all-cause and CVD mortality were observed.
    Conclusions: These results suggest that a genetic risk score of SNPs associated with CVD events and risk factors does not significantly account for CVD risk in the DHS, highlighting the limitations of applying current genetic markers for CVD in individuals with diabetes.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Cardiovascular Diseases/complications ; Cardiovascular Diseases/genetics ; Diabetes Mellitus, Type 2/complications ; Diabetes Mellitus, Type 2/genetics ; Diabetes Mellitus, Type 2/mortality ; Family ; Female ; Genetic Predisposition to Disease ; Genome-Wide Association Study ; Humans ; Male ; Middle Aged ; Phenotype ; Plaque, Atherosclerotic/genetics ; Polymorphism, Single Nucleotide ; Quantitative Trait, Heritable ; Risk Factors ; Vascular Calcification/genetics
    Language English
    Publishing date 2015-08
    Publishing country Germany
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1097676-0
    ISSN 1432-5233 ; 0940-5429
    ISSN (online) 1432-5233
    ISSN 0940-5429
    DOI 10.1007/s00592-015-0720-5
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  9. Article: Effect of a Single Apolipoprotein L1 Gene Nephropathy Variant on the Risk of Advanced Lupus Nephritis in Brazilians.

    Vajgel, Gisele / Lima, Suelen Cristina / Santana, Diego Jeronimo S / Oliveira, Camila B L / Costa, Denise Maria N / Hicks, Pamela J / Cavalcante, Maria Alina G M / Langefeld, Carl D / Valente, Lucila Maria / Crovella, Sergio / Kirsztajn, Gianna Mastroianni / Freedman, Barry I / Sandrin-Garcia, Paula

    The Journal of rheumatology

    2019  Volume 47, Issue 8, Page(s) 1209–1217

    Abstract: Objective: Apolipoprotein L1 gene (: Methods: APOL1 RRA were genotyped in 222 healthy blood donors (controls) and 201 cases with LN from 3 outpatient clinics. Two single-nucleotide polymorphisms in the G1 (rs73885319 and rs60910145) and an indel for ... ...

    Abstract Objective: Apolipoprotein L1 gene (
    Methods: APOL1 RRA were genotyped in 222 healthy blood donors (controls) and 201 cases with LN from 3 outpatient clinics. Two single-nucleotide polymorphisms in the G1 (rs73885319 and rs60910145) and an indel for the G2 (rs71785313) variant were genotyped.
    Results: The frequency of
    Conclusion: Although initial kidney lesions and treatment responses were similar, a single
    MeSH term(s) Apolipoprotein L1/genetics ; Genetic Predisposition to Disease ; Genotype ; Humans ; Lupus Nephritis/genetics ; Polymorphism, Single Nucleotide
    Chemical Substances APOL1 protein, human ; Apolipoprotein L1
    Language English
    Publishing date 2019-11-15
    Publishing country Canada
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 194928-7
    ISSN 1499-2752 ; 0315-162X
    ISSN (online) 1499-2752
    ISSN 0315-162X
    DOI 10.3899/jrheum.190684
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  10. Article ; Online: APOL1

    Ma, Lijun / Ainsworth, Hannah C / Snipes, James A / Murea, Mariana / Choi, Young A / Langefeld, Carl D / Parks, John S / Bharadwaj, Manish S / Chou, Jeff W / Hemal, Ashok K / Petrovic, Snezana / Craddock, Ann L / Cheng, Dongmei / Hawkins, Gregory A / Miller, Lance D / Hicks, Pamela J / Saleem, Moin A / Divers, Jasmin / Molina, Anthony J A /
    Freedman, Barry I

    Kidney international reports

    2020  Volume 5, Issue 6, Page(s) 891–904

    Abstract: Introduction: APOL1: Methods: A global gene expression analysis was performed in human primary renal tubule cell lines derived from 50 African American individuals. Follow-up gene knock out, cell-based rescue, and microscopy experiments were ... ...

    Abstract Introduction: APOL1
    Methods: A global gene expression analysis was performed in human primary renal tubule cell lines derived from 50 African American individuals. Follow-up gene knock out, cell-based rescue, and microscopy experiments were performed.
    Results: APOL1
    Conclusion: Results suggest the mitochondrial fusion/fission pathway may be a therapeutic target in
    Language English
    Publishing date 2020-03-30
    Publishing country United States
    Document type Journal Article
    ISSN 2468-0249
    ISSN (online) 2468-0249
    DOI 10.1016/j.ekir.2020.03.020
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