An enzyme linked immunosorbent assay (ELISA) for the determination of the human haptoglobin phenotype.

Background: Haptoglobin (Hp) is an abundant serum protein which binds extracorpuscular hemoglobin (Hb). Two alleles exist in humans for the Hp gene, denoted 1 and 2. Diabetic individuals with the Hp 2-2 genotype are at increased risk of developing vascular complications including heart attack, stroke, and kidney disease.

Persons with Quebec platelet disorder have a tandem duplication of PLAU, the urokinase plasminogen activator gene.

Quebec platelet disorder (QPD) is an autosomal dominant bleeding disorder linked to a region on chromosome 10 that includes PLAU, the urokinase plasminogen activator gene. QPD increases urokinase plasminogen activator mRNA levels, particularly during megakaryocyte differentiation, without altering expression of flanking genes. Because PLAU sequence changes were excluded as the cause of this bleeding disorder, we investigated whether the QPD mutation involved PLAU copy number variation.

A genome-wide association study identifies a novel major locus for glycemic control in type 1 diabetes, as measured by both A1C and glucose.

Objective: Glycemia is a major risk factor for the development of long-term complications in type 1 diabetes; however, no specific genetic loci have been identified for glycemic control in individuals with type 1 diabetes. To identify such loci in type 1 diabetes, we analyzed longitudinal repeated measures of A1C from the Diabetes Control and Complications Trial.

Research Design And Methods: We performed a genome-wide association study using the mean of quarterly A1C values measured over 6.

Genome-wide association identifies the ABO blood group as a major locus associated with serum levels of soluble E-selectin.

Background: Elevated serum soluble E-selectin levels have been associated with a number of diseases. Although E-selectin levels are heritable, little is known about the specific genetic factors involved. E-selectin levels have been associated with the ABO blood group phenotype.

Multiple superoxide dismutase 1/splicing factor serine alanine 15 variants are associated with the development and progression of diabetic nephropathy: the Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications Genetics study.

Background: Despite familial clustering of nephropathy and retinopathy severity in type 1 diabetes, few gene variants have been consistently associated with these outcomes.

Research Design And Methods: We performed an individual-based genetic association study with time to renal and retinal outcomes in 1,362 white probands with type 1 diabetes from the Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications (DCCT/EDIC) study. Specifically, we genotyped 1,411 SNPs that capture common variations in 212 candidate genes for long-term complications and analyzed them for association with the time from DCCT baseline to event for renal and retinal outcomes using multivariate Cox proportion hazards models.

Quantitative analysis of kallikrein 15 gene expression in prostate tissue.

Purpose: The newly discovered human kallikrein 15 gene KLK15 has been shown in preliminary analysis to be associated with more aggressive types of prostate cancer. We quantitatively measured and compared gene expression of KLK15 in malignant and benign prostate tissues.

Materials And Methods: Matched prostate tissue samples from the cancerous and noncancerous parts of the same prostates were obtained from 90 patients who underwent radical prostatectomy.

Identification of single nucleotide polymorphisms in the human kallikrein 10 (KLK10) gene and their association with prostate, breast, testicular, and ovarian cancers.

Background: The KLK10 gene (also known as the normal epithelial cell-specific 1 gene) is a member of the expanded human kallikrein gene family. Recently, it has been reported that KLK10 is a tumor suppressor gene and that its expression is downregulated in various forms of cancer and cancer cell lines. KLK10 is also upregulated in ovarian cancer.