研究者詳細 - 丹下　正一朗

論文 - 丹下　正一朗

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Genetic Characteristics of Cutaneous, Acral, and Mucosal Melanoma in Japan

Tokimasa Hida, Masashi Idogawa, Junji Kato, Yukiko Kiniwa, Kohei Horimoto, Sayuri Sato, Masahide Sawada, Shoichiro Tange, Masae Okura, Ryuhei Okuyama, Takashi Tokino, Hisashi Uhara

Cancer Medicine 2024年11月

DOI

日本の一般健常人集団におけるBRCA1およびBRCA2バリアントの頻度と病原性(The frequency and pathogenicity of BRCA1 and BRCA2 variants in the general Japanese population)

井戸川雅史, 真里谷奨, 丹下正一朗, 櫻井晃洋, 時野隆至

日本癌学会総会記事 ( (一社)日本癌学会 ) 83回 J - 1048 2024年09月

Mosaic SUFU mutation associated with a mild phenotype of multiple hereditary infundibulocystic basal cell carcinoma syndrome.

Marina Hamada, Tokimasa Hida, Masashi Idogawa, Shoichiro Tange, Takafumi Kamiya, Masae Okura, Toshiharu Yamashita, Takashi Tokino, Hisashi Uhara

The Journal of dermatology 2024年08月 [国際誌]

Multiple hereditary infundibulocystic basal cell carcinoma syndrome (MHIBCC), an autosomal dominant disorder caused by variants in SUFU, is characterized by numerous infundibulocystic basal cell carcinomas (IBCCs). In this report, we present a possible case of mosaic MHIBCC. A 57-year-old woman underwent the removal of four papules on her face, which were diagnosed as IBCCs. Exome sequencing revealed a SUFU c.1022+1G>A mutation within the skin tumor. The same mutation was detected in her blood but at a lower allele frequency. TA cloning revealed that the allele frequency of the mutation in the blood was 0.07. Additionally, tumor assessment revealed loss of heterozygosity (LOH) in chromosome 10, including the SUFU locus. These results indicate the patient had mosaicism for the SUFU mutation in normal tissues, aligning with the mosaic MHIBCC diagnosis. This, combined with LOH, likely contributed to IBCC development. Mosaic MHIBCC may present with milder symptoms. However, it may still increase the risk of developing brain tumors and more aggressive basal cell carcinoma. The possibility of mosaicism should be investigated in mild MHIBCC cases, where standard genetic tests fail to detect SUFU germline variants.

DOI PubMed

クローズアップ実験法(series 370) 知っていますか?TCGAの更新状況

丹下正一朗, 井戸川雅史, 時野隆至

実験医学 ( (株)羊土社 ) 42 ( 9 ) 1414 - 1424 2024年06月

Long Noncoding RNA RP11-278A23.1, a Potential Modulator of p53 Tumor Suppression, Contributes to Colorectal Cancer Progression.

Masayo Kamikokura, Shoichiro Tange, Hiroshi Nakase, Takashi Tokino, Masashi Idogawa

Cancers 16 ( 5 ) 2024年02月 [国際誌]

Recently, many studies revealed that long noncoding RNAs (lncRNAs) play important roles in cancers. To identify lncRNAs contributing to colorectal cancers, we screened lncRNAs through expression and survival analyses in datasets from The Cancer Genome Atlas (TCGA). The screen revealed that RP11-278A23.1 expression is significantly increased in colorectal cancer tissues compared with normal tissues and that high RP11-278A23.1 expression correlates with poor prognosis. The knockdown of RP11-278A23.1 inhibited the growth of and promoted apoptosis in colorectal cancer cells. Next, to comprehensively examine differentially expressed genes after RP11-278A23.1 knockdown, RNA sequencing was performed in HCT116 cells. The expression of p21, a p53 target gene, was significantly upregulated, and the expression of several p53 target proapoptotic genes was also altered. RP11-278A23.1 knockdown increased p53 expression at the translational level but not at the transcriptional level. Interestingly, RP11-278A23.1 knockdown also altered the expression of these proapoptotic genes in DLD1 cells with mutated p53 and in p53-knockout HCT116 cells. These results suggest that RP11-278A23.1 modifies the expression of these apoptosis-related genes in p53-dependent and p53-independent manners. In summary, lncRNA RP11-278A23.1 contributes to colorectal cancer progression by promoting cell growth and inhibiting apoptosis, suggesting that this lncRNA may be a useful therapeutic target.

DOI PubMed

Astrocyte-induced mGluR1 activates human lung cancer brain metastasis via glutamate-dependent stabilization of EGFR

Kojiro Ishibashi, Toshiya Ichinose, Riki Kadokawa, Ryo Mizutani, Sadahiro Iwabuchi, Sumihito Togi, Hiroki Ura, Shoichiro Tange, Keiko Shinjo, Jun Nakayama, Shigeki Nanjo, Yo Niida, Yutaka Kondo, Shinichi Hashimoto, Erik Sahai, Seiji Yano, Mitsutoshi Nakada, Eishu Hirata

Developmental Cell ( Elsevier BV ) 2024年02月 [査読有り]

DOI

長鎖非コードRNA IncAC1はp53標的遺伝子の発現変化を介して大腸癌進展に寄与する(Long non-coding RNA IncAC1 contributes to colorectal cancer progression via the expression change of p53-targeting genes)

井戸川雅史, 小泉昌代, 丹下正一朗, 平野朋美, 大久保陽介, 時野隆至

日本癌学会総会記事 ( (一社)日本癌学会 ) 82回 1242 - 1242 2023年09月

MYEOV overexpression induced by demethylation of its promoter contributes to pancreatic cancer progression via activation of the folate cycle/c-Myc/mTORC1 pathway.

Shoichiro Tange, Tomomi Hirano, Masashi Idogawa, Eishu Hirata, Issei Imoto, Takashi Tokino

BMC cancer 23 ( 1 ) 85 - 85 2023年01月 [国際誌]

BACKGROUND: While molecular targeted drugs and other therapies are being developed for many tumors, pancreatic cancer is still considered to be the malignant tumor with the worst prognosis. We started this study to identify prognostic genes and therapeutic targets of pancreatic cancer. METHODS: To comprehensively identify prognostic genes in pancreatic cancer, we investigated the correlation between gene expression and cancer-specific prognosis using transcriptome and clinical information datasets from The Cancer Genome Atlas (TCGA). In addition, we examined the effects of the suppression of candidate prognostic genes in pancreatic cancer cell lines. RESULT: We found that patients with high expression levels of MYEOV, a primate-specific gene with unknown function, had significantly shorter disease-specific survival times than those with low expression levels. Cox proportional hazards analysis revealed that high expression of MYEOV was significantly associated with poor survival and was an independent prognostic factor for disease-specific survival in pancreatic cancer patients. Analysis of multiple cancer samples revealed that the MYEOV promoter region is methylated in noncancer tissues but is demethylated in tumors, causing MYEOV overexpression in tumors. Notably, the knockdown of MYEOV suppressed the expression of MTHFD2 and other folate metabolism-related enzyme genes required for the synthesis of amino acids and nucleic acids and also restored the expression of c-Myc and mTORC1 repressors. CONCLUSION: There is a significant correlation between elevated MYEOV expression and poor disease-specific survival in pancreatic cancer patients. MYEOV enhances the activation of several oncogenic pathways, resulting in the induction of pancreatic cancer cell proliferation. Overall, MYEOV acts as an oncogene in pancreatic cancer. Furthermore, MYEOV may be a prognostic biomarker and serve as an 'actionable' therapeutic target for pancreatic cancers.

DOI PubMed

CRISPRを用いた遺伝子活性化システムによる腫瘍細胞株におけるlncRNAの網羅的機能スクリーニング(Comprehensive screening of long noncoding RNAs(lncRNAs) based on CRISPR-mediated gene activation in cancer cells)

平野朋美, 井戸川雅史, 丹下正一朗, 時野隆至

日本癌学会総会記事 ( (一社)日本癌学会 ) 81回 P - 3096 2022年09月

Prevalence of Pathogenic Germline BRCA1/2 Variants and Their Association with Clinical Characteristics in Patients with Epithelial Ovarian Cancer in a Rural Area of Japan

Akiko Abe, Issei Imoto, Shoichiro Tange, Masato Nishimura, Takeshi Iwasa

Genes 2022年06月

DOI

Inhibition of EGFR and MEK surmounts entrectinib resistance in a brain metastasis model of NTRK1-rearranged tumor cells.

Chiaki Suzuki, Akihiro Nishiyama, Sachiko Arai, Shoichiro Tange, Atsushi Tajima, Azusa Tanimoto, Koji Fukuda, Yohei Takumi, Hiroshi Kotani, Shinji Takeuchi, Naohiro Yanagimura, Koushiro Ohtsubo, Norio Yamamoto, Koichi Omori, Seiji Yano

Cancer science 113 ( 7 ) 2323 - 2335 2022年04月 [国際誌]

Tropomyosin receptor kinase (TRK) inhibitors have demonstrated histology-agnostic efficacy in patients with neurotrophic receptor tyrosine kinase (NTRK) gene fusion. Although responses to TRK inhibitors can be dramatic and durable, duration of response may eventually be limited by acquired resistance via several mechanisms, including resistance mutations such as NTRK1-G595R. Repotrectinib is a second-generation TRK inhibitor, which is active against NTRK1-G595R. However, its efficacy against entrectinib-resistant tumors has not been fully elucidated. In the present study, we established entrectinib-resistant tumor cells (M3B) in a brain metastasis model inoculated with NTRK1-rearranged KM12SM cells, and examined the sensitivity of M3B cells to repotrectinib. While M3B cells harbored the NTRK1-G595R mutation, they were unexpectedly resistant to repotrectinib. The resistance was due to extracellular signal-regulated kinase (ERK) reactivation partially mediated by epidermal growth factor receptor (EGFR) activation. We further demonstrate that the triplet combination of repotrectinib, EGFR inhibitor, and MEK inhibitor could sensitize M3B cells in vitro as well as in a brain metastasis model. These results indicate that resistant mutations, such as NTRK1-G595R, and alternative pathway activation, such as ERK activation, could simultaneously occur in entrectinib-resistant tumors, thereby causing resistance to second-generation inhibitor repotrectinib. These findings highlight the importance of intensive examinations to identify resistance mechanisms and application of the appropriate combination treatment to circumvent the resistance.

DOI PubMed

Multiomics identifies the link between intratumor steatosis and the exhausted tumor immune microenvironment in hepatocellular carcinoma

Hiroki Murai, Takahiro Kodama, Kazuki Maesaka, Shoichiro Tange, Daisuke Motooka, Yutaka Suzuki, Yasuyuki Shigematsu, Kentaro Inamura, Yoshihiro Mise, Akio Saiura, Yoshihiro Ono, Yu Takahashi, Yota Kawasaki, Satoshi Iino, Shogo Kobayashi, Masashi Idogawa, Takashi Tokino, Tomomi Hashidate-Yoshida, Hideo Shindou, Masanori Miyazaki, Yasuharu Imai, Satoshi Tanaka, Eiji Mita, Kazuyoshi Ohkawa, Hayato Hikita, Ryotaro Sakamori, Tomohide Tatsumi, Hidetoshi Eguchi, Eiichi Morii, Tetsuo Takehara

Hepatology 77 ( 1 ) 77 - 91 2022年

Background and Aims: Immunotherapy has become the standard-of-care treatment for hepatocellular carcinoma (HCC), but its efficacy remains limited. To identify immunotherapy-susceptible HCC, we profiled the molecular abnormalities and tumor immune microenvironment (TIME) of rapidly increasing nonviral HCC. Approaches and Results: We performed RNA-seq of tumor tissues in 113 patients with nonviral HCC and cancer genome sequencing of 69 genes with recurrent genetic alterations reported in HCC. Unsupervised hierarchical clustering classified nonviral HCCs into three molecular classes (Class I, II, III), which stratified patient prognosis. Class I, with the poorest prognosis, was associated with TP53 mutations, whereas class III, with the best prognosis, was associated with cadherin-associated protein beta 1 (CTNNB1) mutations. Thirty-eight percent of nonviral HCC was defined as an immune class characterized by a high frequency of intratumoral steatosis and a low frequency of CTNNB1 mutations. Steatotic HCC, which accounts for 23% of nonviral HCC cases, presented an immune-enriched but immune-exhausted TIME characterized by T cell exhaustion, M2 macrophage and cancer-associated fibroblast (CAF) infiltration, high PD-L1 expression, and TGF-β signaling activation. Spatial transcriptome analysis suggested that M2 macrophages and CAFs may be in close proximity to exhausted CD8+ T cells in steatotic HCC. An in vitro study showed that palmitic acid-induced lipid accumulation in HCC cells upregulated PD-L1 expression and promoted immunosuppressive phenotypes of cocultured macrophages and fibroblasts. Patients with steatotic HCC, confirmed by chemical-shift MR imaging, had significantly longer PFS with combined immunotherapy using anti–PD-L1 and anti-VEGF antibodies. Conclusions: Multiomics stratified nonviral HCCs according to prognosis or TIME. We identified the link between intratumoral steatosis and immune-exhausted immunotherapy-susceptible TIME.

DOI PubMed

Detection of novel fusion genes by next-generation sequencing-based targeted RNA sequencing analysis in adenoid cystic carcinoma of head and neck

Eri Shibata, Kei-ichi Morita, Kou Kayamori, Shoichiro Tange, Hiroki Shibata, Yosuke Harazono, Yasuyuki Michi, Tohru Ikeda, Hiroyuki Harada, Issei Imoto, Tetsuya Yoda

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology ( Mosby Inc. ) 132 ( 4 ) 426 - 433 2021年10月

Objective: Adenoid cystic carcinoma (AdCC) is a rare, indolent salivary gland tumor that is reported to be driven by fusion genes. However, MYB/MYBL1-NFIB fusions have been detected in < 60% of all AdCC cases and the oncogenic driver mutations in approximately 40% of AdCC remain unknown. Our aim was to identify novel gene fusions in AdCC. Study Design: We investigated 20 AdCC cases using a targeted RNA sequencing panel to identify gene fusions and performed quantitative real-time reverse transcription polymerase chain reaction to assess MYB, MYBL1, and NFIB expression levels. Results: A total of 36 fusion transcripts in 15 cases were detected and validated by Sanger sequencing. The MYB-NFIB and MYBL1-NFIB fusion genes were detected in 9 and 3 cases, respectively, in a mutually exclusive manner. Furthermore, novel gene fusions, namely, NFIB-EPB41L2, MAP7-NFIB, NFIB-MCMDC2, MYBL1-C8orf34, C8orf34-NFIB, and NFIB-CASC20, were identified. Among them, NFIB-EPB41L2 and NFIB-MCMDC2 are thought to activate MYB and MYBL1 expression, respectively, through the insertion of a genomic segment in proximity to MYB and MYBL1 genes, respectively. Conclusion: Six novel gene fusions other than MYB/MYBL1-NFIB were identified. The detection of novel fusion genes and investigation of the molecular mechanism will contribute to the development of novel molecular targeted therapies for this disease.

DOI

Early dynamics of circulating tumor DNA predict chemotherapy responses for patients with esophageal cancer.

Ryosuke Fujisawa, Takeshi Iwaya, Fumitaka Endo, Masashi Idogawa, Noriyuki Sasaki, Hayato Hiraki, Shoichiro Tange, Tomomi Hirano, Yuka Koizumi, Masakazu Abe, Tomoko Takahashi, Mizunori Yaegashi, Yuji Akiyama, Mari Masuda, Akira Sasaki, Fumiaki Takahashi, Yasushi Sasaki, Takashi Tokino, Satoshi S Nishizuka

Carcinogenesis 42 ( 10 ) 1239 - 1249 2021年09月 [国際誌]

We investigated whether early circulating tumor DNA (ctDNA) changes, measured using digital PCR (dPCR), can predict later chemotherapy responses in esophageal squamous cell cancer (ESCC). We compared the dynamics of ctDNA and tumor volumes during chemotherapy in 42 ESCC. The accuracy of predictions of later chemotherapy responses were evaluated by the ratio of the variant allele frequency (VAF) of ctDNA (post-/pre-ctDNA) and the total tumor volume (post-/pre-volume) before and after an initial chemotherapy cycle using a receiver-operating characteristic curve analysis. Total positive and negative objective responses (ORs) were defined as either >50% or ≤50% reductions, respectively, in the total tumor volume at the end of first-line chemotherapy. Mutation screening of 43 tumors from 42 patients revealed 96 mutations. The pretreatment dPCR-ctDNA data were informative in 38 patients, using 70 selected mutations (1-3 per patient). The areas under the curve (AUCs) for the post-/pre-volume and post-/pre-ctDNA levels used in predicting the total OR were 0.85 and 0.88, respectively. The optimal cutoff value of post-/pre-ctDNA was 0.13. In 20 patients with post-/pre-volume ≥50%, the total OR could be predicted by the post-/pre-ctDNA with high accuracy; the AUC by post-/pre-ctDNA was higher than that by post-/pre-volume (0.85 vs 0.76, respectively). Patients with low post-/pre-ctDNA (n = 18) had a significantly better overall survival rate than those with high post-/pre-ctDNA (n = 20; P = 0.03). Early ctDNA changes after an initial cycle of chemotherapy predict later responses to treatment with high accuracy in ESCC patients.

DOI PubMed

Dead or alive? Pitfall of survival analysis with TCGA datasets.

Masashi Idogawa, Masayo Koizumi, Tomomi Hirano, Shoichiro Tange, Hiroshi Nakase, Takashi Tokino

Cancer biology & therapy 22 ( 10-12 ) 1 - 2 2021年09月 [国際誌]

We often encounter situations in which data from the TCGA that have been analyzed in papers we read or reviewed cannot be reproduced, even when TCGA datasets are used, especially in survival analyses. Therefore, we attempted to confirm the data source for TCGA survival analysis and found that several websites used to analyze the survival data of TCGA datasets inappropriately handle the survival data, causing differences in statistical analyses. This causes the misinterpretation of results because figures of survival analysis results in several papers are sometimes exactly as generated by these sites, and the results depend on only the tools provided by these sites. We would like to make this situation widely known and raise the problem for scientific soundness.

DOI PubMed

Genetic analyses of a secondary poroma and trichoblastoma in a HRAS‐mutated sebaceous nevus

Tomoyuki Minowa, Takafumi Kamiya, Tokimasa Hida, Masae Okura, Junji Kato, Masashi Idogawa, Shoichiro Tange, Tomomi Hirano, Takashi Tokino, Hisashi Uhara

The Journal of Dermatology 2021年08月

DOI

Functionally confirmed compound heterozygous ADAM17 missense loss-of-function variants cause neonatal inflammatory skin and bowel disease 1.

Issei Imoto, Masako Saito, Kenichi Suga, Tomohiro Kohmoto, Masanobu Otsu, Keisuke Horiuchi, Hironao Nakayama, Shigeki Higashiyama, Mayumi Sugimoto, Ayumi Sasaki, Yukako Homma, Miki Shono, Ryuji Nakagawa, Yasunobu Hayabuchi, Shoichiro Tange, Shoji Kagami, Kiyoshi Masuda

Scientific reports 11 ( 1 ) 9552 - 9552 2021年05月 [査読有り] [国際誌]

A disintegrin and metalloprotease 17 (ADAM17) is the major sheddase that processes more than 80 substrates, including tumour necrosis factor-α (TNFα). The homozygous genetic deficiency of ADAM17 causing a complete loss of ADAM17 expression was reported to be linked to neonatal inflammatory skin and bowel disease 1 (NISBD1). Here we report for the first time, a family with NISBD1 caused by functionally confirmed compound heterozygous missense variants of ADAM17, namely c.1699T>C (p.Cys567Arg) and c.1799G>A (p.Cys600Tyr). Both variants were detected in two siblings with clinical features of NISBD1, such as erythroderma with exudate in whole body, recurrent skin infection and sepsis and prolonged diarrhoea. In a cell-based assay using Adam10/17 double-knockout mouse embryonic fibroblasts (Adam10/17-/- mEFs) exogenously expressing each of these mutants, phorbol 12-myristate 13-acetate-stimulated shedding was strongly reduced compared with wild-type ADAM17. Thus, in vitro functional assays demonstrated that both missense variants cause the loss-of-function of ADAM17, resulting in the development of NISBD1. Our study further expands the spectrum of genetic pathology underlying ADAM17 in NISBD1 and establishes functional assay systems for its missense variants.

DOI PubMed

Proteasomal degradation of polycomb-group protein CBX6 confers MMP-2 expression essential for mesothelioma invasion

Katsuya Sakai, Takumi Nishiuchi, Shoichiro Tange, Yoshinori Suzuki, Seiji Yano, Minoru Terashima, Takeshi Suzuki, Kunio Matsumoto

Scientific Reports ( Springer Science and Business Media LLC ) 10 ( 1 ) 2020年12月

Abstract The aggressive invasiveness of malignant mesothelioma limits cancer therapy, however, the molecular mechanisms underlying the invasiveness remain largely unknown. Here we found that the matrix metalloproteinase-2 (MMP-2) was required for the invasion of mesothelioma cells in the collagen matrix and the gene expression of MMP-2 was correlated with the invasive phenotype. The MMP-2 gene expression was regulated by DNA and histone methylation around the transcription start site, implicating the involvement of the polycomb repressive complex (PRC). Knockdown of PRC component chromobox 6 (CBX6) promoted MMP-2 expression and invasion of mesothelioma cells. Transcriptome analysis suggested that CBX6 regulates sets of genes involved in cancer cell migration and metastasis. In invasive but not non-invasive cells, CBX6 was constantly unstable owing to ubiquitination and protein degradation. In human tissues, CBX6 localized in the nuclei of normal mesothelium and benign mesothelioma, but the nuclear staining of CBX6 was lost in malignant mesothelioma. These results suggest involvement of proteasomal degradation of CBX6 in mesothelioma progression.

DOI

p53標的遺伝子ARVCFはスプライシング変化によりp53の腫瘍抑制能を補助する

井戸川雅史, 鈴木菜摘, 丹下正一朗, 時野隆至

日本癌学会総会記事 ( (一社)日本癌学会 ) 79回 OJ4 - 3 2020年10月

Claudin-6 is a single prognostic marker and functions as a tumor-promoting gene in a subgroup of intestinal type gastric cancer.

Tomohiro Kohmoto, Kiyoshi Masuda, Katsutoshi Shoda, Rizu Takahashi, Sae Ujiro, Shoichiro Tange, Daisuke Ichikawa, Eigo Otsuji, Issei Imoto

Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association 23 ( 3 ) 403 - 417 2020年05月 [国内誌]

BACKGROUND: We aimed to identify novel tumor-promoting drivers highly expressed in gastric cancer (GC) that contribute to worsened prognosis in affected patients. METHODS: Genes whose expression was increased and correlated with worse prognosis in GC were screened using datasets from the Cancer Genome Atlas and Gene Expression Omnibus. We examined Claudin-6 (CLDN6) immunoreactivity in GC tissues and the effect of CLDN6 on cellular functions in GC cell lines. The mechanisms underlying GC-promoting function of CLDN6 were also investigated. RESULTS: CLDN6 was identified as a gene overexpressed in GC tumors as compared with adjacent non-tumorous tissues and whose increased expression was positively correlated with worse overall survival of GC patients, particularly those with Lauren's intestinal type GC, in data from multiple publicly available datasets. Additionally, membranous CLDN6 immunoreactivity detected in intestinal type GC tumors was correlated with worse overall survival. In CLDN6-expressing GC cells, silencing of CLDN6 inhibited cell proliferation and migration/invasion abilities, possibly via suppressing transcription of YAP1 and its downstream transcriptional targets at least in part. CONCLUSIONS: This study identified CLDN6 as a GC-promoting gene, suggesting that CLDN6 to be a possible single prognostic marker and promising therapeutic target for a subset of GC patients.

DOI PubMed

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