» Articles » PMID: 37891989

Molecular Analysis of Biliary Tract Cancers with the Custom 3' RACE-Based NGS Panel

Abstract

The technique 3' rapid amplification of cDNA ends (3' RACE) allows for detection of translocations with unknown gene partners located at the 3' end of the chimeric transcript. We composed a 3' RACE-based RNA sequencing panel for the analysis of gene rearrangements, detection of activating mutations located within , and genes, and measurement of the expression of and transcripts. This NGS panel was utilized for the molecular profiling of 168 biliary tract carcinomas (BTCs), including 83 intrahepatic cholangiocarcinomas (iCCAs), 44 extrahepatic cholangiocarcinomas (eCCAs), and 41 gallbladder adenocarcinomas (GBAs). The NGS failure rate was 3/168 (1.8%). iCCAs, but not other categories of BTCs, were characterized by frequent alterations (17/82, 20.7%) and mutations (23/82, 28%). Other potentially druggable events included amplifications or mutations (7/165, 4.2% of all successfully analyzed BTCs) and p.V600E mutations (3/165, 1.8%). In addition to NGS, we analyzed microsatellite instability (MSI) using the standard five markers and revealed this event in 3/158 (1.9%) BTCs. There were no instances of and gene rearrangements or exon 14 skipping mutations. Parallel analysis of 47 iCCA samples with the Illumina TruSight Tumor 170 kit confirmed good performance of our NGS panel. In conclusion, targeted RNA sequencing coupled with the 3' RACE technology is an efficient tool for the molecular diagnostics of BTCs.

Citing Articles

Use of 3' Rapid Amplification of cDNA Ends (3' RACE)-Based Targeted RNA Sequencing for Profiling of Druggable Genetic Alterations in Urothelial Carcinomas.

Mitiushkina N, Tiurin V, Anuskina A, Bordovskaya N, Nalivalkina E, Terina D Int J Mol Sci. 2024; 25(22).

PMID: 39596194 PMC: 11594887. DOI: 10.3390/ijms252212126.


Response to trametinib, hydroxychloroquine, and bevacizumab in a young woman with -mutated metastatic intrahepatic cholangiocarcinoma: a case report.

Musaelyan A, Anokhina E, Turdubaeva A, Mitiushkina N, Ershova A, Shestakova A Explor Target Antitumor Ther. 2024; 5(3):780-788.

PMID: 38966164 PMC: 11220291. DOI: 10.37349/etat.2024.00246.

References
1.
Zingg D, Bhin J, Yemelyanenko J, Kas S, Rolfs F, Lutz C . Truncated FGFR2 is a clinically actionable oncogene in multiple cancers. Nature. 2022; 608(7923):609-617. PMC: 9436779. DOI: 10.1038/s41586-022-05066-5. View

2.
Yamashita K, Iwatsuki M, Yasuda-Yoshihara N, Morinaga T, Nakao Y, Harada K . Trastuzumab upregulates programmed death ligand-1 expression through interaction with NK cells in gastric cancer. Br J Cancer. 2020; 124(3):595-603. PMC: 7851117. DOI: 10.1038/s41416-020-01138-3. View

3.
Subbiah V, Cassier P, Siena S, Garralda E, Paz-Ares L, Garrido P . Pan-cancer efficacy of pralsetinib in patients with RET fusion-positive solid tumors from the phase 1/2 ARROW trial. Nat Med. 2022; 28(8):1640-1645. PMC: 9388374. DOI: 10.1038/s41591-022-01931-y. View

4.
Singh R . Target Enrichment Approaches for Next-Generation Sequencing Applications in Oncology. Diagnostics (Basel). 2022; 12(7). PMC: 9318977. DOI: 10.3390/diagnostics12071539. View

5.
Matter M, Chijioke O, Savic S, Bubendorf L . Narrative review of molecular pathways of kinase fusions and diagnostic approaches for their detection in non-small cell lung carcinomas. Transl Lung Cancer Res. 2021; 9(6):2645-2655. PMC: 7815372. DOI: 10.21037/tlcr-20-676. View