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A new biomarker for heart failure and acute kidney inury research
  • Insulin Growth factor binding protein 7

Measurement of novel biomarkers to predict chronic heart failure outcomes and left ventricular remodeling

Myocardial remodeling is pivotal in the progression and complication of chronic heart failure (HF). We assessed serial measurement of five biomarkers with biologic links to remodeling (biglycan, secreted frizzled-related protein 3, endostatin, insulin-like growth factor binding protein 7 [IGFBP7], mimecan) in 142 patients with HF followed through 882 office visits. IGFBP7 and mimecan were most associated with events; in fully adjusted models, lower IGFBP7 concentrations across visits independently predicted fewer events (odds ratio [OR] = 0.83; 95 % confidence interval [CI] = 0.73-0.95, p = 0.01). Subjects with rising mimecan had greater decrease in left ventricular end diastolic (p = 0.07) and systolic (p = 0.01) volumes, greater increase in ejection fraction (p = 0.02), and had lowest event rates. Statistical models suggested several HF medications might lead to changes in both IGFBP7 and mimecan values. The results suggest serial measurement of IGFBP7 provides prognostic information, while changes in mimecan provide unique information regarding myocardial remodeling.
Motiwala SR et al. J Cardiovasc Transl Res. 2014 Mar;7(2):250-61

Validation of cell-cycle arrest biomarkers for acute kidney injury using clinical adjudication

Rationale: We recently reported two novel biomarkers for acute kidney injury (AKI), tissue inhibitor of metalloproteinases (TIMP)-2 and insulin-like growth factor binding protein 7 (IGFBP7), both related to G1 cell cycle arrest. Objectives: We now validate a clinical test for urinary [TIMP-2]·[IGFBP7] at a high-sensitivity cutoff greater than 0.3 for AKI risk stratification in a diverse population of critically ill patients. Methods: We conducted a prospective multicenter study of 420 critically ill patients. The primary analysis was the ability of urinary [TIMP-2]·[IGFBP7] to predict moderate to severe AKI within 12 hours. AKI was adjudicated by a committee of three independent expert nephrologists who were masked to the results of the test. Measurements and Main Results: Urinary TIMP-2 and IGFBP7 were measured using a clinical immunoassay platform. The primary endpoint was reached in 17% of patients. For a single urinary [TIMP-2]·[IGFBP7] test, sensitivity at the prespecified high-sensitivity cutoff of 0.3 (ng/ml)(2)/1,000 was 92% (95% confidence interval [CI], 85-98%) with a negative likelihood ratio of 0.18 (95% CI, 0.06-0.33). Critically ill patients with urinary [TIMP-2]·[IGFBP7] greater than 0.3 had seven times the risk for AKI (95% CI, 4-22) compared with critically ill patients with a test result below 0.3. In a multivariate model including clinical information, urinary [TIMP-2]·[IGFBP7] remained statistically significant and a strong predictor of AKI (area under the curve, 0.70, 95% CI, 0.63-0.76 for clinical variables alone, vs. area under the curve, 0.86, 95% CI, 0.80-0.90 for clinical variables plus [TIMP-2]·[IGFBP7]). Conclusions: Urinary [TIMP-2]·[IGFBP7] greater than 0.3 (ng/ml)(2)/1,000 identifies patients at risk for imminent AKI. 
Bihorac A et al. Am J Respir Crit Care Med. 2014 Apr 15;189(8):932-9.
human IGFBP-7 elisa kit from aviscera bioscience IGFBP-7 (Human) ELISA
Code No.: SK00589-01
Size: 96 T
Price: $360.00 USD
Standard Range:9.4-600 pg/ml
Sensitivity:5 pg/ml
Sample Type: cell culture, serum, EDTA plasma
Sample requres: 100uL per well
IntraCV: 4-6%
InterCV: 8-10%
Protocol: PDF


Code No.
Price ($)
96 T
480 T