miRInform™ Pancreas FFPE

miRInform™ Pancreas utilizes cutting edge technology to aid in the diagnosis and disease management of PDAC

Overview

miRInform™ Pancreas is a state of the art miRNA-based Laboratory Developed Test (LDT), run on formalin-fixed paraffin-embedded (FFPE) specimens, which aids in the differential diagnosis and disease management of pancreatic ductal adenocarcinoma (PDAC) patients.

This miRNA-based LDT is based on an expression difference between miR-196a and miR-217 where miR-196a is expected to be up-regulated in PDAC, while miR-217 is expected to be down-regulated, as compared to normal pancreas and chronic pancreatitis tissues¹.

Background

Pancreatic cancer is the fourth leading cause of cancer-related deaths in the US, with a 5-year survival rate lower than 5%. Pancreatic ductal adenocarcinoma (PDAC) accounts for >90% cases of pancreatic cancer (link to ACS).

Differentiation between a benign condition of chronic pancreatitis and pancreatic cancer is often difficult, as both conditions may present with the similar symptoms (abdominal pain, weight loss, jaundice) and are not mutually exclusive. Additionally, chronic pancreatitis specimens share many of the histopathological and imaging features of pancreatic cancer both microscopically and during preoperative imaging studies².

Inaccurate diagnosis can lead to major surgery for benign disease or delay of surgery for a potentially curable lesion. Because of these adverse clinical consequences, there is considerable subjectivity in the final call which has been reported to have up to a 20% error rate³∙⁴.

Technical Information

The test is based on an RT-qPCR analysis of the raw expression difference (ΔCT) between 2 gene products, miR-196a and miR-217. This miRNA signature is a balanced set wherein, one gene product is expected to be up-regulated in pancreatic ductal adenocarcinoma (miR-196a), while the other is expected to be down-regulated (miR-217), as compared to normal pancreas and chronic pancreatitis tissue¹.

A blinded validation study on FFPE specimens using a threshold value of 0.5 ΔCT resulted in analytical sensitivity of 95.2% (95%CI: 77.3- 99.2) and analytical specificity of 94.9% (95%CI: 83.1- 98.6).

Sample Requirements

• At least three (3)10 µm FFPE tissue sections containing ≥60% abnormal area content. Include one (1) H&E stained slide.

• Five (5) to eight (8) unstained slides with 5 µm tissue sections containing ≥60% abnormal area content. Include one (1) H&E stained slide.

• FFPE clinical blocks containing ≥60% abnormal area.

• For specimens with <60% abnormal area content, Asuragen’s in-house pathologists will determine if the specimen abnormal area content can be enriched.

Billing and Turnaround Time

Asuragen bills third parties (private insurance and Medicare), patients, and hospitals.

Note: Asuragen does not accept Medicaid. Asuragen cannot accept samples from New York or Florida at this time.

For additional billing information, please contact Clinical Laboratory Support: Phone: 888-772-8018 Email: ClinicalLabSupport@asuragen.com

Results can be expected within 8-10 business days from the date the sample is received.

1. Szafranska A.E., et al. MicroRNA expression alterations are linked to tumorigenesis and non-neoplastic processes in pancreatic ductal adenocarcinoma. Oncogene 2007; 26(30): p. 4442-52.

2. Van Gulik, T.M., et al. Incidence and clinical findings of benign, inflammatory disease in patients resected for presumed pancreatic head cancer. Gastrointest Endosc 1997; 46(5): p. 417-23.

3. Takahashi, K., et al. Differential diagnosis of pancreatic cancer and focal pancreatitis by using EUS-guided FNA. Gastrointest Endosc 2005; 61(1): p. 76-9.

4. Taylor, B., et al. Carcinoma of the head of the pancreas versus chronic pancreatitis: diagnostic dilemma with significant consequences. World J Surg 2003; 27(11): p. 1249-57.

Coming Soon

Asuragen will offer miRInform™ Pancreas on FNA samples.

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