(Tokushima University Institutional Repository: 118973)
2.
Yasuyuki Okada, Peng Fuduan, Perea Jose, Corchete Luis, Bujanda Luis, Li Wei and Goel Ajay : Genome-wide methylation profiling identifies a novel gene signature for patients with synchronous colorectal cancer, British Journal of Cancer, Vol.128, No.1, 112-120, 2023.
(Summary)
There are no robust tools for the diagnosis of synchronous colorectal cancer (SyCRC). Herein, we developed the first methylation signature to identify and characterise patients with SyCRC. For biomarker discovery, we analysed the genome-wide methylation profiles of 16 SyCRC and 18 solitary colorectal cancer (SoCRC) specimens. We thereafter established a methylation signature risk-scoring model to identify SyCRC in an independent cohort of 38 SyCRC and 42 SoCRC patients. In addition, we evaluated the prognostic value of the identified methylation profile. We identified six differentially methylated CpG probes/sites that distinguished SyCRC from SoCRC. In the validation cohort, we developed a methylation panel that identified patients with SyCRC from not only larger tumour (AUC = 0.91) but also the paired remaining tumour (AUC = 0.93). Moreover, high risk scores of our panel were associated with the development of metachronous CRC among patients with SyCRC (AUC = 0.87) and emerged as an independent predictor for relapse-free survival (hazard ratio = 2.72; 95% CI = 1.12-6.61). Furthermore, the risk stratification model which combined with clinical risk factors was a diagnostic predictor of recurrence (AUC = 0.90). Our novel six-gene methylation panel robustly identifies patients with SyCRC, which has the clinical potential to improve the diagnosis and management of patients with CRC.
(Keyword)
Humans / DNA Methylation / Colorectal Neoplasms / Neoplasm Recurrence, Local / Prognosis / Protein Processing, Post-Translational / Biomarkers, Tumor / Gene Expression Regulation, Neoplastic
Yasushi Sato, Yasuyuki Okada, Yasuteru Fujino, Tomoyuki Kawaguchi, Yoshifumi Kida, Yasuhiro Mitsui, Hironori Tanaka, Tetsu Tomonari, Shinji Kitamura, Koichi Okamoto, Yutaka Kawano, Hiroshi Miyamoto, Masahiro Sogabe and Tetsuji Takayama : Clinical Outcomes of Comprehensive Genomic Profiling Tests for Gastrointestinal Cancers: Experience from Tokushima University Hospital., The Journal of Medical Investigation : JMI, Vol.70, No.1.2, 154-159, 2023.
(Summary)
In Japan, cancer genome profiling (CGP) for cancer patients without standard treatment has been covered by public insurance since June 2019. This study analyzed data of 122 patients with gastrointestinal tumors who underwent CGP to clarify cancer genome medicine's current status and possible problems at the Tokushima University Hospital. The major types of cancer included pancreatic (n=30), colorectal (n=25), biliary tract (n=15), gastric (n=11), and hepatocellular carcinoma (n=8). CGP tests included F1CDx in 70 patients (57%), F1LCDx in 36 (30%), TSO500 in 14 (11%), and NCC Oncopanel in 2 (2%). Actionable gene alterations were identified in 72 patients (59%), but only 5 patients (4%) were treated for pancreatic (n=1), colorectal (n=3), and small bowel cancers (n=1). The main reasons for not receiving genotype-matched therapy included the lack of appropriate drugs or clinical trials that matched the actionable gene alterations (n=40) and the inability to participate in clinical trials (n=10). There is still not a sufficient number of patients receiving genotype-matched treatment for gastrointestinal cancers. To promote cancer genome medicine in regional areas, attempts to improve access to genotype-matched therapies are required, as well as to promote the development of new molecular-targeted drugs and clinical trials for these drugs. J. Med. Invest. 70 : 154-159, February, 2023.
hironori wada, Yasuteru Fujino, Kaizo Kagemoto, Yoshifumi Kida, Yasuyuki Okada, Yasuhiro Mitsui, Koichi Okamoto, Yasushi Sato, Yoshimi Bando, Hiroshi Miyamoto and Tetsuji Takayama : Gastric cancer genome profiling reveals HER2 false-negative status and informs a successful trastuzumab treatment strategy, The Japanese Journal of Gastro-enterology, Vol.119, No.10, 937-945, 2022.
(Summary)
Intratumoral HER2 heterogeneity is a well-described gastric cancer feature and may explain many false-negative results related to this oncogene. An 81-year-old man was diagnosed at our hospital with stage IV gastric cancer with multiple lymph node metastases. Immunohistochemistry (IHC) analysis indicated that the primary tumor was HER2-negative. After a chemotherapy course, we submitted a pretreatment biopsy specimen for comprehensive cancer genome profiling (CGP) to determine the last-line therapy. This revealed HER2 amplification. The specimen was reevaluated using fluorescence in situ hybridization and IHC with deeper-cut specimens, which confirmed that the tumor was indeed HER2-positive. Therefore, the patient was treated with chemotherapy plus trastuzumab, which elicited tumor shrinkage and conferred long-term survival. Our current data underscore the CGP importance, which can provide more accurate tumor profilings and inform subsequent treatment decisions.
Beibei Ma, Hiroyuki Ueda, Koichi Okamoto, Masahiro Bando, Shota Fujimoto, Yasuyuki Okada, Tomoyuki Kawaguchi, Hironori Wada, Hiroshi Miyamoto, Mitsuo Shimada, Yasushi Sato and Tetsuji Takayama : TIMP1 promotes cell proliferation and invasion capability of right-sided colon cancers via the FAK/Akt signaling pathway., Cancer Science, Vol.113, No.12, 4244-4257, 2022.
(Summary)
Although right-sided colorectal cancer (CRC) shows a worse prognosis than left-sided CRC, the underlying mechanism remains unclear. We established patient-derived organoids (PDOs) from left- and right-sided CRCs and directly compared cell proliferation and invasion capability between them. We then analyzed the expression of numerous genes in signal transduction pathways to clarify the mechanism of the differential prognosis. Cell proliferation activity and invasion capability in right-sided cancer PDOs were significantly higher than in left-sided cancer PDOs and normal PDOs, as revealed by Cell Titer Glo and transwell assays, respectively. We then used quantitative RT-PCR to compare 184 genes in 30 pathways among right-sided and left-sided cancer and normal PDOs and found that the TIMP1 mRNA level was highest in right-sided PDOs. TIMP1 protein levels were upregulated in right-sided PDOs compared with normal PDOs but was downregulated in left-sided PDOs. TIMP1 knockdown with shRNA significantly decreased cell proliferation activity and invasion capability in right-sided PDOs but not in left-sided PDOs. Moreover, TIMP1 knockdown significantly decreased pFAK and pAkt expression levels in right-sided PDOs but not in left-sided PDOs. A database analysis of The Cancer Genome Atlas revealed that TIMP1 expression in right-sided CRCs was significantly higher than in left-sided CRCs. Kaplan-Meier survival analysis showed significantly shorter overall survival in high-TIMP1 patients versus low-TIMP1 patients with right-sided CRCs but not left-sided CRCs. Our data suggest that TIMP1 is overexpressed in right-sided CRCs and promotes cell proliferation and invasion capability through the TIMP1/FAK/Akt pathway, leading to a poor prognosis. The TIMP1/FAK/Akt pathway can be a target for therapeutic agents in right-sided CRCs.
(Keyword)
Humans / Prognosis / Signal Transduction / Colorectal Neoplasms / Colonic Neoplasms / Cell Proliferation / Tissue Inhibitor of Metalloproteinase-1
Jung Gerhard, Hernández-Illán Eva, Lozano J Juan, Sidorova Julia, Muñoz Jenifer, Yasuyuki Okada, Quintero Enrique, Hernandez Goretti, Jover Rodrigo, Carballal Sabela, Cuatrecasas Miriam, Moreno Lorena, Diaz Mireia, Ocaña Teresa, Sánchez Ariadna, Rivero Liseth, Ortiz Oswaldo, Llach Joan, Castells Antoni, Pellisé Maria, Goel Ajay, Batlle Eduard and Balaguer Francesc : Epigenome-Wide DNA Methylation Profiling of Normal Mucosa Reveals HLA-F Hypermethylation as a Biomarker Candidate for Serrated Polyposis Syndrome, The Journal of Molecular Diagnostics : JMD, Vol.24, No.6, 674-686, 2022.
(Summary)
Serrated polyposis syndrome (SPS) is associated with a high risk for colorectal cancer. Intense promoter hypermethylation is a frequent molecular finding in the serrated pathway and may be present in normal mucosa, predisposing to the formation of serrated lesions. To identify novel biomarkers for SPS, fresh-frozen samples of normal mucosa from 50 patients with SPS and 19 healthy individuals were analyzed by using the 850K BeadChip Technology (Infinium). Aberrant methylation levels were correlated with gene expression using a next-generation transcriptome profiling tool. Two validation steps were performed on independent cohorts: first, on formalin-fixed, paraffin-embedded tissue of the normal mucosa; and second, on 24 serrated lesions. The most frequently hypermethylated genes were HLA-F, SLFN12, HLA-DMA, and RARRES3; and the most frequently hypomethylated genes were PIWIL1 and ANK3 (Δβ = 10%; P < 0.05). Expression levels of HLA-F, SLFN12, and HLA-DMA were significantly different between SPS patients and healthy individuals and correlated well with the methylation status of the corresponding differentially methylated region (fold change, >20%; r > 0.55; P < 0.001). Significant hypermethylation of CpGs in the gene body of HLA-F was also found in serrated lesions (Δβ = 23%; false discovery rate = 0.01). Epigenome-wide methylation profiling has revealed numerous differentially methylated CpGs in normal mucosa from SPS patients. Significant hypermethylation of HLA-F is a novel biomarker candidate for SPS.
(Keyword)
Adenomatous Polyposis Coli / Argonaute Proteins / Biomarkers / Colorectal Neoplasms / DNA Methylation / Epigenome / Histocompatibility Antigens Class I / Humans / Mucous Membrane
Yasuyuki Okada, Naoki Takahashi, Tetsuji Takayama and Ajay Goel : LAMC2 promotes cancer progression and gemcitabine resistance through modulation of EMT and ATP-binding cassette transporters in pancreatic ductal adenocarcinoma., Carcinogenesis, Vol.42, No.4, 546-556, 2021.
(Summary)
Pancreatic ductal adenocarcinoma (PDAC) is an aggressive disease with poor prognosis. Gemcitabine remains an effective option for the majority of PDAC patients. Unfortunately, currently no reliable prognostic and predictive biomarkers of therapeutic response are available for the patients with PDAC. Laminin γ2 (LAMC2) is overexpressed in several cancers, and its high expression facilitates cancer development and chemoresistance. However, its functional role in PDAC remains unclear, and a better understanding of this will likely help improve the prognosis of PDAC patients. This study aimed to elucidate the clinical and biological role of LAMC2 in PDAC. We first analyzed the expression levels of LAMC2 by real-time reverse transcription PCR in a cohort of 114 PDAC patients. Interestingly, higher expression of LAMC2 significantly correlated with poor survival in PDAC cohort. In addition, elevated LAMC2 expression served as a potential prognostic marker for survival. Subsequently, functional characterization for the role of LAMC2 in PDAC was performed by small interfering RNA knockdown in pancreatic cancer (PC) cell lines. Interestingly, inhibition of LAMC2 in PC cells enhanced the gemcitabine sensitivity and induction of apoptosis. Moreover, it inhibited colony formation ability, migration and invasion potential. Furthermore, LAMC2 regulated the expression of epithelial-mesenchymal transition (EMT) phenotype. In addition, LAMC2 significantly correlated with genes associated with the expression of ATP-binding cassette (ABC) transporters in PC cells and PDAC patients. In conclusion, these results suggest that LAMC2 regulates gemcitabine sensitivity through EMT and ABC transporters in PDAC and may be a novel therapeutic target in PDAC patients.
Yasuyuki Okada, Satoshi Nisiwada, Kensuke Yamamura, Masayuki Sho, Hideo Baba, Tetsuji Takayama and Ajay Goel : Identification of laminin γ2 as a prognostic and predictive biomarker for determining response to gemcitabine-based therapy in pancreatic ductal adenocarcinoma., European Journal of Cancer, Vol.146, 125-134, 2021.
(Summary)
Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal malignancies. While the extracellular matrix component plays an integral role in PDAC pathogenesis and mediating chemoresistance, its role in predicting response to chemotherapy in patients with PDAC remains unclear. We performed a systematic biomarker discovery by analysing genome-wide transcriptomic profiling data from 423 patients (GSE71729, GSE21501 and The Cancer Genome Atlas [TCGA]) for predicting overall survival (OS). This was subsequently validated in two independent clinical cohorts of 270 patients with PDAC (training cohort, n = 121, and validation cohort, n = 149). In addition, we investigated endoscopic ultrasound-fine needle aspiration biopsy specimens from 51 patients with PDAC with an unresectable cancer for predicting therapeutic response to gemcitabine-based therapy. After rigorous bioinformatic analysis, we identified laminin γ2 (LAMC2) to be a significant prognostic factor in all three PDAC data sets (GSE71729: hazard ratio [HR] = 2.04, P = 0.002; GSE21501: HR = 2.17, P = 0.031; TCGA: HR = 2.57, P < 0.001). High LAMC2 expression in patients with PDAC was associated with a significantly poor OS and relapse-free survival in both the training (P < 0.001, P < 0.001) and validation cohorts (P = 0.001, P = 0.026). More importantly, LAMC2 expression robustly identified patients with PDAC and unresectable disease and those who responded to gemcitabine-based therapy (area under the curve = 0.79; 95% confidence interval [CI], 0.65-0.89). The univariate logistic regression analysis revealed that high LAMC2 expression was the only factor that predicted poor response to gemcitabine in patients with PDAC (odds ratio = 4.90; 95% CI, 1.45-16.6; P = 0.011). We conclude that LAMC2 is a novel prognostic and predictive biomarker for gemcitabine-based therapy in both the adjuvant and palliative setting; which could have significant impact on precision and individualised treatment of patients with PDAC.
Yasushi Sato, Kazuyoshi Noda, Yasuyuki Okada, Kensei Nishida, Yutaka Kawano, Toshihito Tanahashi, Masanori Takehara, Yasuteru Fujino, Koichi Okamoto, Hiroshi Miyamoto and Tetsuji Takayama : Exosomal miR-199a-3p secreted from cancer-associated adipocytes promote pancreatic cancer progression., DDW2023, Chicago, May 2023.
2.
Yasuyuki Okada, Fuduan Peng, Jose Perea, Luis Bujanda, Tetsuji Takayama, Wei Li and Ajay Goel : Identification of a Novel Epigenetic Signature for the Identification of Patients with Synchronous Colorectal Cancers., Digestive Disease Week2021, May 2021.
3.
Yasuyuki Okada, Ya Cui, Satoshi Nishiwada, Eunsung Jun, Fuminori Sonohara, SongCheol Kim, Yasuhiro Koreda, Masayuki Sho, Wei Li, Tetsuji Takayama and Ajay Goel : Expression Profiling Identifies a Novel miRNA-based Signature for Predicting Local Recurrence in Patients with Pancreatic Ductal Adenocarcinoma., Digestive Disease Week2021, May 2021.
4.
Yasuyuki Okada, Goel Ajay, Nishiwada Satoshi, Takahashi Naoki and Tetsuji Takayama : LAMC2 promotes progression and gemcitabine resistance through modulation of EMT and ATP-binding transporters in pancreatic ductal adenocarcinoma, AACR annual meeting 2021, Apr. 2021.