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Articles by M. R Griffin
Total Records ( 2 ) for M. R Griffin
  T. M Pini , M. R Griffin , C. L Roumie , M. M Huizinga , J. H Fowke , R Greevy , X Liu and H. J. Murff
 

Thiazolidinediones (TZD) have been shown to down-regulate prostate-specific antigen (PSA) levels in prostate cancer cell lines and decrease PSA velocity among prostate cancer patients; however, the effect of TZDs on serum PSA levels among men with diabetes at risk for prostate cancer is unknown. We conducted a retrospective cohort study of veterans receiving care for diabetes between 1999 and 2005 to determine if TZD use affects PSA levels in veterans at risk for prostate cancer. Eligible patients were male, ≥45 years old, taking at least one oral antidiabetic medication, and with two or more recorded PSA values. Patients with a prior history of prostate cancer or prostatectomy were excluded. Of the 13,791 patients included in the adjusted analysis, 2,016 (14.6%) were prescribed a TZD. No effect of cumulative TZD dose on change in PSA was detected (P = 0.26). Increased TZD exposure was not associated with a change in PSA, suggesting that TZD treatment for diabetes is unlikely to affect prostate cancer detection. (Cancer Epidemiol Biomarkers Prev 2009;18(6):1937–8)

  A. M Hung , D. C Crawford , M. R Griffin , K Brown Gentry , M. S Lipkowitz , E. D Siew , K Cavanaugh , J. B Lewis , T. A Ikizler and the AASK Study Group
 

Background and objectives: Chronic inflammation may play a role in chronic kidney disease (CKD) progression. CRP gene polymorphisms are associated with serum C-reactive protein (CRP) concentrations. It is unknown if CRP polymorphisms are associated with CKD progression or modify the effectiveness of anti-hypertensive therapy in delaying CKD progression.

Design, setting, participants, & measurements: We genotyped 642 participants with CKD from the African American Study of Kidney Disease and Hypertension (AASK), selecting five tag polymorphisms: rs2808630, rs1205, rs3093066, rs1417938, and rs3093058. We compared the minor allele frequencies (MAF) of single nucleotide polymorphisms (SNPs) in AASK to MAFs of African Americans from NHANES III. Among AASK participants, we evaluated the association of SNPs with CRP levels and prospectively with a composite: halving the GFR, ESRD, or death.

Results: The MAF was higher for the rs2808630_G allele (P = 0.03) and lower for the rs1205_A allele (P = 0.03) in the AASK compared with NHANES III. Among AASK participants, the rs3093058_T allele predicted higher CRP concentrations (P < 0.0001) but not CKD progression. The rs2808630_GG genotype was associated with higher risk of the composite endpoint compared with the AA genotype (P = 0.002). Participants with the rs2808630_GG genotype on angiotensin converting enzyme inhibitors (ACEIs) versus β blockers had increased risk of progression (P = 0.03).

Conclusion: CRP SNPs that were associated with higher levels of CRP did not predict CKD progression. The rs2808630_GG genotype was associated with higher risk of CKD progression, and in patients with this genotype, ACEIs did not slow progression.

 
 
 
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